bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Large Inclusions in Casting Slab of 45# Steel
Authors: Gao Ju , Du Cheng Liang
Published: March 2013

According to the production process of 45#steel(120t BOF→ slag refining →CC), some system analysis are introduced to research on the type, composition and quantity of large inclusions in casting slab under slag washing process, the effect of slag washing production process on the cleanliness of casting slab is evaluated. The results of the study show that: Under slag washing process, many of large inclusions are spherical inclusions，the main type of large inclusions is CaO-SiO2-Al2O3-MnO complex inclusion andSiO2-Al2O3 inclusion; the content of large inclusions in normal slab is 5.17mg/10kg, it is lower than that under un-slag washing process; the content of large inclusions in head slab is 108.82mg/10kg, it’s 21.05 times higher than that in normal slab; the content of large inclusions in compound casting slab is 15.94mg/10kg, it’s 3.08 times higher than that in normal slab; the content of large inclusions in casting slab is slightly higher under the condition of unsteady casting; the main inclusions with a size of between 140μm and 300μm in head slab, take up 70.13%, the inclusions with a size of more than 300μm is second, take up 29.24%, and the least is inclusions with a size of between 80μm and 140μm, only take up 0.63%. The level of the molten steel fluctuated remarkably, slag entrapment and secondary oxidation is serious at the casting start and compound casting, which cause the cleanliness of casting slab decreasing. Unsteady casting has great effect on the cleanliness of casting slab.
A Review on R&D Status and Application of Fly Ash Cenospheres in Microwave Absorption
Authors: Zhang Jing , Yu Jiang Long , Wang Ping Yang , Zhao Huan
Published: March 2013

The paper provides an overview of surface modification and application of fly ash cenospheres. The state of the art research and development of electromagnetic wave absorption materials based on surface treated fly ash cenospheres are summarized.
Porous Sepiolite/Starch Composites：Preparation, Structure and Absorption Properties
Authors: Du Yuan Yuan , Fang Hai Hong , Zheng Peng Wu
Published: March 2013

The porous nanocomposites consisting of starch and sepiolite were prepared by a solvent exchange technique, i.e. replacing ice crystals in frozen sepiolite/starch gel with ethanol. The influence of sepiolite contents on pore size, apparent density, moisture adsorption, oil adsorption capacity and dye adsorption of porous sepiolite/starch composites (SPPSs) was investigated. The addition of sepiolite reduced pore size, apparent density and moisture adsorption of SPPSs. The oil adsorption and the methylene blue adsorption of SPPSs could respectively reach 10.1 g/g and 2.07 mg g-1 at the maximal, while those of PS were only 5.83 g/g and 1.55 mg g-1.
Study on Anti-Aging Performance of Composite Materials of PP-G-an /PP /SiO2
Authors: Wang Ya Zhen , Li Yong , Jia Wei Nan , Yue Cheng E , Ma Di
Published: March 2013

In order to further improve the anti-aging properties of polypropylene (PP), the polypropylene (PP) was modified via Supercritical carbon dioxide (SC CO2) grafting copolymerization with AN. PP-g-AN characterized by FT-IR. Polypropylene grafted acrylonitrile (PP-g-AN) / polypropylene (PP) / silica (SiO2) were blended. The influence of the contents of PP-g-AN on the anti-aging property was discussed. At the same time, the anti-aging mechanism was studied. After the artificial accelerated ageing test, the result shows that the anti-aging properties of PP were improved greatly which due to the addition of PP-g-AN and SiO2．
Research of Interface of Carbon Fiber Reinforced PA6 by In-Situ Anionic Polymerization
Authors: Zhao Hong Kai , Xiao Li Guang , Gao Jing Wu
Published: March 2013

High polymer active functional groups can be grafted on the surface of carbon fibers so as to adjust the interface effect between fibers in the composite material and resin and improve the performance of composite material, by controlling the structure of grafted high polymer, the interface layer with intended performance can be well designed. Heat treatment does not affect the fiber strength, the content of functional groups on the surface of the fibers reaches the max. value around 1h. There are no macromolecules polymerized and grafted on the surface of carbon fibers not subjected to isocyanate grafting treatment. Through isocyanate treatment after heat treatment, it can be obviously seen that the nylon molecules are grafted on the fiber surface. When no activating agent is added in the polymerized monomers, the resin grafting percent of fiber surface can reach 18.8%; when 0.003 activating agent (mole ratio of it to monomers) is added in the monomers, the grafting percent of PA6 on surface of carbon fibers is only 7.65%, this is the result of reactive competition on the interface between monomer matrix and fibers.
The Application of Fiber Reinforced Concrete in Cement Concrete Pavement
Authors: Zhang Tao , Xu Yun Yun , Lin Zhen Rong
Published: March 2013

Concrete is the most widely used building material in the world. In terms of traffic and bridge construction, concrete is also the most widely used building materials. The cement concrete of the inherent advantages of having a high compressive strength while also has easy to produce cracks, poor impact resistance inherent weaknesses. These weaknesses limit the application of cement concrete. In order to improve the comprehensive quality of the concrete, to further improve the scope of application of cement concrete pavement, the main problems of cement concrete pavement is analyzed. Then the progress of the current hot research field of fiber reinforced concrete is analyzed comprehensively. Finally, on the basis of summing up the status quo, the next step is to study key issues is presented.
Characterization of Nanoscale Precipitates in 10Ni3MnCuAl Steel by Three Dimensional Atom Probe Tomography
Authors: Luo Yi
Published: March 2013

The precipitation hardened steel 10Ni3MnCuAl after solution heat treatment and aging at 510 °C is investigated by three dimensional atom probe (3DAP). The results show that the Ni, Mn, Al and Cu distribute uniformly in the steel after solution heat treatment, but they form multicomponent precipitates after aging and cause the hardness increase. The concentration ratio between Ni and Al in multicomponent precipitates is roughly 1, while the concentration of Fe decreases, and the distance between concentration peak of Cu and those of Ni and Al becomes wider with the aging time, which is related to the precipitation character of Cu in α-ferrite.
Effect of Temperature and Synthesis of CuO Nanostructures on Cu Plate by Thermal Method
Authors: Supakosl Benjara , Mekla Vatcharinkorn , Raksapha Chakkaphan
Published: March 2013

CuO nanostructures were synthesized by thermal evaporation method using Cu metal plate in air at temperatures ranging from 400 to 600 C for 6 h. The CuO nanostructures were characterized by X-ray diffraction, XRD and field emission scanning electron microscopy, FE-SEM. X-ray diffraction, XRD pattern showed the bicrystal nanostructure of CuO and Cu2O. FE-SEM images indicated that the nanowires depended on temperatures. The diameter of Cuo nanowires varies from 10 nm to 20 nm and length of several 5 micrometers.
Effect of Wet Ammonia on Crystalline Forms of Ammonium Polyphosphate
Authors: Liu Gou Sheng , Chen Wen Yan , Liu Yue Long
Published: March 2013

Ammonium polyphosphate (APP) has six crystalline forms, in which form II is commercially applied as flame retardant in engineering plastics such as PP and ABS, form V is extensively studied recently. In preparation of APP, the reaction atmosphere is significant to controllably obtain a certain crystalline forms. In this paper, the effect of wet ammonia is investigated. The results show that low concentration of wet ammonia is suitable for preparation of form II, while dry ammonia is suitable for preparation of form V. The results are informative for controllable preparation of APP in industrial production.
Ultrasound-Assisted one-Pot Synthesis of Dispersable Nano-MnO2 in the Presence of Nanocellulose
Authors: Chen Yan Dan , Wu Qiao Mei , Huang Biao , Tang Li Rong
Published: March 2013

One-step rapid synthesis of colloidal nano-MnO2 suspension from KMnO4 solution has been readily carried out in the presence of nanocellulose whiskers (NCW) upon a sonochemistry procedure at room temperature. NCW that plays a triple role of a reducing agent and a support, as well as of a stabilizer, has been introduced to obtain stable dispersions of MnO2 nanoparticles. UV-vis spectroscopy, XRD, and TEM were employed to characterize the products. Uniform α-MnO2 nanoparticles of dimensions 20–30 nm were obtained with good crystalinity and phase-purity by air- calcination treatment at 500 °C.
Synthesis and Application of Titanium Carbonitride
Authors: Gong Xi Na , Sun Jin Feng , Quan Kun , Meng Yong Qiang
Published: March 2013

The characteristics of each method for synthesis titanium carbonitride were introduced. The property of titanium carbonitride synthesized by each method is affected by raw materials, parameters and external conditions. The application of titanium carbonitride is mainly on cermets cutting tools, it also exhibits a lot of good properties on coating materials, superhard cutting tools and multi phase ceramics.
The Influence of B4C on Mechanical Properties of MgO-SiC Based Refractory Castables
Authors: Wei Jun Cong , Wang Jing , Tu Jun Bo
Published: March 2013

The effects of B4C addition on the room temperature physical properties and hot mechanical properties of MgO-SiC based refractory castables were investigated using magnesia and SiC fines as starting materials and silica fume as a binder. The microstructure was characterized by scanning electron microscopy (SEM). The results showed that drying strength of MgO-SiC based castables decreased with the increase in B4C addition, the immediate temperature strength and hot temperature strength increased. The HMOR at 1400°C for 0.5h decreased. This is because B4C oxidized and produced a liquid phase during heating, contributing to sintering and making the material denser. So the cold strength increased. On the other hand, due to the formation of liquids, direct binding reduced and the HMOR decreased
Fluorescence Enhancement of Europium(III) Perchlorate by 2,2′-Dipyridyl on Bis(benzylsulfinyl)methane Complex
Authors: Li Wen Xian , Ao Bo Yang , Zhang Jing
Published: March 2013

A novel ligand with double sulfinyl groups, bis(benzylsulfinyl)methane L, was synthesized by a new method. Its novel ternary complex, has been synthesized [using L as the first ligand, and dipyridyl L' as the second ligand]. In order to study the effect of the second ligand on the fluorescence properties of rare-earth sulfoxide complex, a novel binary europium complex has been synthesized. Photoluminescent measurement showed that the first ligand L could efficiently transfer the energy to Eu (III) ions in the complex. Furthermore, the detailed luminescence analyses on the rare earth complexes indicated that the ternary Eu (III) complex manifested stronger fluorescence intensities, longer lifetimes, and higher fluorescence quantum efficiencies than the binary Eu (III) materials. The fluorescence emission intensities and fluorescence lifetimes of the ternary complex enhanced more obviously than the binary complex.
Studies on the Properties of LiFePO4 -C/Li Batteries Doped Carbon by Vapor Deposition
Authors: Cai Fei Peng , Wang Jian Mei , Wang Bo , Yang Gai , Hu Su Qin , Jiang Bo
Published: March 2013

A vapor deposed LiFePO4/C composite cathode material was acquired through filled carbon to FePO4 precursor by vapor deposition. The results showed that the carbon could contact to LiFePO4 nanopaticle directly and uniformly and formed a conducting network. It showed a good discharge capacity retention at large discharge rate. It was 57.3% at 10C. It also showed an excellent capacity steady characteristic when cycling at 1C.
Influence of Aging Treatments on the Microstructure Evolution in Mg-8.8Hg-8Ga (wt%) Alloys
Authors: Feng Yan , Wang Ri Chu , Peng Chao Qun
Published: March 2013

All precipitate morphologies in Mg-8.8%Hg-8%Ga alloy for a range of aging temperatures are investigated in details using SEM, TEM and OM. The results show that Mg21Ga5Hg3 is the dominant precipitate in Mg-8.8%Hg-8%Ga alloy and precipitates in dispersed particles. This study elaborates on the morphological evolution of Mg21Ga5Hg3 precipitates as a function of aging time and temperature.
Recovery of Nickel and Cobalt from Dimethyldithiocarbamate Precipitation of Pyrolusite Leaching Process
Authors: Su Hai Feng , Li Bo Ji , Lu Qing , Wen Yan Xuan , Su Jing
Published: March 2013

Dimethyldithiocarbamate precipitation is a secondary resource containing nickel and cobalt, which are formed by adding sodium dimethyldithiocarbamate to purify the neutralized filtrate of pyrolusite reductive leaching process. The extraction of nickel and cobalt from dimethyldithiocarbamate precipitation was investigated using nitric acid as oxidant in dilute sulfuric acid medium in this paper. The effects of concentrations of nitric acid and sulfuric acid, leaching temperature as well as reaction time were discussed. The results showed that high nickel and cobalt recovery could be obtained by analyzing the leaching efficiencies of nickel and cobalt during the leaching process. The optimal leaching condition was 1.47 mol/L H2SO4 and 1.16 mol/L HNO3 for 30 min at 45 °C while using particles smaller than 0.420 mm. And the leaching efficiencies were 98% for Co and 95% for Ni, respectively.
Thermal Effects Caused by Inclusions in Optical Films Irradiated by CW Laser
Authors: Huang Cai Hua , Sun Xiao Hua , Sun Yi Hua , Zou Jun
Published: March 2013

A steady thermal conduction model was presented to study the temperature field and thermal stress distribution in film irradiated by continuous wave laser. The thermal effects may arise from either the absorbing inclusions or the intrinsic absorption of film. Based on the plane thermal conduction assumption, the characteristics of damage resulted from local melting or evaporation and thermal stress were discussed. The damage region resulted from local melting or evaporation smaller than that from thermal stress. The circumferential stress σθis the main cause accounting for the stress damage. The normal stress perpendicular to the interface between film and substrate is the direct cause of drum type damage. The characteristics of damage in unsteady thermal conduction caused by pulse laser can be analyzed qualitatively by means of this model.
Study on Degradation of Dyes Wastewater by N-Doped TiO2
Authors: Miao Chao Lin , Wang Hui
Published: March 2013

nano-sized TiO2 doped with different percentage of N was prepared quickly by sol-gel process，and the photocatalytic properties of degradation dyes wastewaters were studied under stimulant solar light irradiation in the ambient air. Some properties of photocatalysts were characterized by the means of XPS, UV-Vis ,XRD, and degradation loss. The results showed the catalytic activity was the best when the doped of nitrogen was 0.5% at calcinated 400°C，and the degradation of the methylene blue was almost completed.
Effect of Epoxy Emulsion on the Mechanical Properties and Permeability of Cement Mortar
Authors: Zhang Kai , Xu Guo Xiao , You Jin Qiu
Published: March 2013

The effects of epoxy emulsion on the mechanical properties and water and chloride permeability of cement mortar and concrete were experimentally studied. The results show that adding epoxy emulsion will improve the flexural and tensile strengths at both early (7 d) and later (28 d) ages, and the 28 d compressive strength of cement mortar, though the compressive strength at 7d will be decreased a little. The suitable dosage of epoxy emulsion is 6~10% (solid content) based on the mass of the cement in mortar. The water and chloride permeability of cement mortar are also remarkable improved when 6~10%epoxy emulsion is added.
Experimental Research of the Rapid Set Cement Concrete for Rapid Repair of Concrete Pavements
Authors: Sun Ren Juan , Ge Zhi , Li Wu , Zhou Hai Fang , Huang Da Wei
Published: March 2013

The efficient rapid repair for the distressed concrete pavement requires a rapid setting material that can be placed, cured, and opened to the traffic in short period. Normally, the time of the traffic open is determined by the concrete strength gain in the early hours. Meanwhile, the strength development and thermal and shrinkage properties of the concrete affect the structural and bonding performance of the repaired pavement. Type Ⅲ cement and Calcium Sulfoaluminate (CSA) cement are categorized as the rapid set cement (RSC) and are the most widely used as the cementitious material for the concrete structure rapid repair. The compressive strength of the RSC concrete cylinders with different mix proportions had been tested to obtain a strength gain guide for the rapid repair construction. Coefficient of the thermal expansion and shrinkage of the concrete were experimented. The results show that the RSC cement concretes are steady and can meet the requirement of the concrete pavement repair.
A Finite Cylindrical Cavity Expansion and Penetration Model of Exponential Strain-Hardening Materials
Authors: Jiang Zhi Gang , Song Dian Yi , Liu Fei
Published: March 2013

A finite cylindrical cavity expansion model for metal targets was proposed in consideration of the lateral free boundary and strain-hardening effect. Analytical solutions of radial pressure on the cavity wall were obtained. An engineering model for the penetration of rigid sharp-nosed projectiles into thick cylindrical metal targets with finite radius was developed. The influence of the radius ratio of target to projectile on penetration depth was studied. The present engineering model has good agreement with ballistic experiments and numerical simulation. The influence of the lateral free boundary of target on penetration depth needs to be considered for radius ratio of target to projectile less than 20.
Friction Correction and Constitutive Equation of a Non-Quenched and Tempered Steel during Hot Deformation
Authors: Li Xia , Li Xiao Xia , Li Ming Yao , Wu Xiao Chun
Published: March 2013

Thermo-mechanical experiments were carried out to study the effect of deformation speed and temperature on the behaviour of a non-quenched and tempered steel during hot forging. And an effective method for correction of friction was used to amend the tested flow stress, Meanwhile, the constitutive equations of flow stress-strain for TL1438 steel during hot forming was established based on the amended flow stress and hyperbolic sine which includes Zener-Hollomon parameter, and related parameters of TL1438 during hot forming was obtained by analyzing the data.
Study on Treatment Effect of Three Types of Industrial Wastewater by Ammonium Molybdate-Modified Bentonite
Authors: Shao Hong , Gao Wei , Zhang Di , Liu Zi Ru , Li Wen Ze
Published: March 2013

Ammonium molybdate modified bentonite was prepared from bentonite using ammonium molybdate as modified agent, which was used to remove several industrial effluents. It is used in the pretreatment of monosodium glutamate wastewater, slaughtering wastewater and beer wastewater which have high concentration of COD. The suitable reaction condition is ensured and the treatment effects for the treated effluents are compared by ammonium Molybdate-modified Bentonite. The result shows that the ammonium molybdate-modified bentonite is better than other flocculants. The COD removal rate of monosodium glutamate wastewater, slaughtering wastewater and beer wastewater could reach 55.40%, 96.32%, 93.23% respectively. The treatment of slaughtering wastewater is the best and all treated effects meet the pretreatment requirement. Ammonium molybdate-modified bentonite is applied to several industrial effluents in different business. It is a new type flocculant with good flocculation effect and wide application.
Numerical Simulation the Stress Uniformity in Split Hopkinson Pressure Bar Testing
Authors: Jin Hong Bin
Published: March 2013

The assumption of uniform stress in a test specimen is fundamental to SHPB test technique. In the present paper, a numerical simulation of wave propagation in SHPB is performed to validate the assumption. A one-dimensional model based on CSPM is firstly developed. Then the wave propagations in SHPB with various area ratios of bar/specimen are simulated. The results show that the condition of stress uniformity is not satisfied, especially at the beginning of wave propagation. For the large area specimen, the stress tends to be uniform. While for the small area specimen, the non-uniformity of stress is more apparent.
Status and Prospects of Indirect Squeeze Casting Technology
Authors: Meng Fan Sheng , Lin Bo , Fan Jian Lei
Published: March 2013

Because of the unique advantages of indirect squeeze casting, has become a heated topic of current national research. Indirect squeeze casting research status and current problems are studied. Finally, come out the prospect for the future development.
Effect of Contact Angle Hysteresis on Liquid Bridge while Sphere Particles are in Relative Movement
Authors: Yang Song , Wu Jun Hua , Wang Xin
Published: March 2013

Hysteresis effect of contact angle has an important impact on liquid bridges between sphere particles. This effect is not limited to increasing liquid volume of fixed particles. The hysteresis effect of contact angle is expressed by fixed liquid volume while the two sphere particles are in relative movement. The hysteresis effect of contact angle on the liquid bridge is also significant. In this paper, the hysteresis effect of contact angle on capillary forces of liquid bridges is analyzed when the two sphere particles are in relative movement. Results indicate that contact angle hysteresis effects on capillary force are significant.
Anti-Icing Properties of Superhydrophobic poly (vinyl chloride) Coatings
Authors: Yuan Zhi Qing , Wang Xian , Bin Ji Ping , Liu Qi Long , Jiang Hai Yun , Zhao De Jian , Wu Ruo Mei , Chen Hong
Published: March 2013

In this work, the anti-icing properties of different poly (vinyl chloride) coatings with different wettabilities were investigated in a climatic chamber with a working temperature of −10 °C. Compared with smooth poly (vinyl chloride) coating, the superhydrophobic poly (vinyl chloride) coating with high sliding angle did not show obvious anti-icing property. However, the superhydrophobic poly (vinyl chloride) coating with low sliding angle can largely prevent ice formation on the surface, showing excellent anti-icing property.
Microstructure and Corrosion Behavior of Laser Cladding Al3Ti-Based Composite Coatings on AA6063 Aluminum Alloy
Authors: He Huan , Fu Yue Chun , Guo Wei Hua , Xiao Min , Pang Xing Zhi , Shen Xiao Ming , Zeng Jian Min
Published: March 2013

Intermetallic compound Al3Ti-based IMC coatings were formed on AA6063 aluminum alloy by laser cladding. The microstructure and corrosion characteristics in 3.5% NaCl solution were investigated. The results show that, the laser cladding coating is made up of Al3Ti dendrites, interdendritic α-Al and uniform distribution of TiC which hardly melted during laser irradiation, and shows good bonding to the substrate. The cross distribution of Al3Ti and α-Al helps to avoid the generation of cracks in the coating. The corrosion resistance of the laser cladding coatings is greatly increased as compared with the substrate, which owes mainly to the existence of hard Al3Ti and TiC. And with the increasing of TiC content in the coating, the corrosion resistance is improved simultaneously.
Microstructure Refinement of Medium Carbon Steel through Ti Deoxidation
Authors: Shao Shuai , Shen Yun Fu , Zhou Ya Hui , Chen Shou Wang , Li Xin , Xia Fan , Zhang Jiu Feng , Cai Zheng Yu , Kong Hui
Published: March 2013

The medium carbon steel (C: 0.26%, mass percentage) was deoxidized by Ti alloys, and its features of inclusion and microstructure were systemically studied through the scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS). The results show that the element of titanium in inclusions coexists with manganese, and no single-phase oxides of titanium are observed. Through the statistical analysis, it can be seen that the average size of Ti-contained inclusions is similar to the inclusions without the Ti, and the percentage of large inclusions (>5μm) is smaller in Ti-contained inclusions, which may reduce the harmful effect of inclusions. After etching in 3Vol% Nital solution, it’s found that the Ti-contained inclusions can act as nucleation sits for the intragranular acicular ferrite.
Simulation of the Coupled Mass Transfer and Gas-Solid Reaction in Porous Packed Beds
Authors: Li Ming Chun , Liu Jia Tao , Jing Yu , Qu Yan Ping
Published: March 2013

According to the continuum assumption and the mass transfer controlled regime, a mathematical model describing the combined diffusion, convection and the reversible chemical reactions in a porous packed bed was established and numerically solved. The simulation results are validated by comparing with the experimental data. The calculated results showed that, an increase in convection velocity causes an increase in Thielet number and an opposite effect for Th/Pe ratio. Therefore, the ability of chemical reaction increases under the condition of increasing convection velocity. But the utilization of reaction gas decreases. The influence of main parameters on the reaction conversion all can be analyzed by calculating the Thiele number and the Peclet number.
Design on Closed Loop Soft Water Cooling System for Shougang Qiangang No.3 BF
Authors: Li Lin , Zhang Fu Ming , Liu Yong , Wang Dai Jun , Li Yong Qi
Published: March 2013

Ability to improve cooling system, avoid untimely damage of BF lining and coolers, reduce maintenance frequency and prolong maintenance period during the furnace campaign, it is imperative for BF longevity. Describe development of cooling system, illustrate economic rationality and safe reliability of closed loop soft water cooling system, stress equipments, process, design, system measurement and control on closed loop soft water cooling system for Shougang Qiangang No.3 BF. Take full account of BF working condition, lining structure and corrosion mechanism, combine actual investment, choose advanced and rational coolers; develop segmentation design for cooling system, strengthen BF cooling effectively, boost system steering rate in order to reduce temperature of brick lining, prolong lifetime of brick lining, keep the lining integrity, maintain rational furnace profile, ensure BF production and longevity.
Effects of Impurity on Vanadium Precipitatation
Authors: Cao Peng , Meng Wei Wei , Lei Lei , Peng Yi
Published: March 2013

The effects of ammonium adding temperature and coefficient on precipitation rate and product quality for a certain kind of vanadium-bearing solution are studied in this paper. On this basis, a further investigation is carried out to probe into the effects of Na, Si, and Al on the precipitation rate and product quality. It can be found in the experiments that the precipitation rate can reach to 99.328% or above with the optimal parameters listed as follows: ammonium adding temperature at 35~65°C, ammonium adding coefficient at 2, and Na, Si and Al content under 25 g/L, 1.5 g/L, and 0.1 g/L respectively. As a result, Na, Si, and Al content in ammonium polyvanadate(APV) is 0.058%, 0.053%, and 0.01% respectively.
Study on Extraction of Vanadium from High Acid Leach Solution of Stone Coal Using Extractant HBL@101
Authors: Li Qing Gang , Xu Liang , Qi Zhao Shu , Zeng Li
Published: March 2013

A new extractant HBL@101 was used to directly extract vanadium from high acid leach solution of stone coal. The effects of acidity and Eh of feed, time, phase ratio and temperature on the extraction of vanadium were investigated. The extraction distribution isotherm was also obtained. The results showed that the extraction of vanadium reached 98% in single stage with A/O ratio of 1:1 at 35~45 °C for 10 min. More than 99.7% of vanadium can be extracted in three-stage counter current extraction. The loaded organic can be easily stripped using NaOH solution. After pH adjustment, the strip liquor was used to precipitate vanadium by adding NH4Cl. The final product of V2O5 with purity of 98.7% can be obtained.
Application of Crossing Borehole Hydraulic Fracturing in Coal Mine
Authors: Xie Chang Hong
Published: March 2013

In order to solve technical problems which restricted coal mining operation, such as low penetrability of coal mass and low efficiency of gas extraction, according to geological mining condition of Yuyang Mine, Crossing Borehole Hydraulic Fracturing system was designed and investigated in N3704 west gas tunnel (below). The system was based on coal or rock mass hydraulic fracturing theory and gas flow theory. Through the experimental study of fracture and analysis of fracturing effect after inspection, the result of field test shows that Crossing Borehole Hydraulic Fracturing system could improve the gas extraction efficiency significantly. The test result provides a basis for hydraulic fracturing operation in other mines.
Application of Wet Concrete Spraying Technology in Mine Roadway
Authors: Zhang Da Lin , Bi Yuan Zhi
Published: March 2013

In general, dry spraying method is using in mine roadway, but the dry spraying method has many disadvantages. The compactness of concrete is not high. Concrete has low strength. Rebound is very big. And there are much dust. So the wet spraying method is necessary. This method can well solve the disadvantages of dry spraying method, and can greatly improve the working environment.
Removal of Dichloroethylene in Water Using a Novel TCAS-Loaded Resin
Authors: He Miao Miao , Hu Xiao Jun , Peng Yong Biao , He Xin
Published: March 2013

Through the method of the static tests, the removal rate of aqueous dichloroethylene onto a new TCAS-loaded resin was researched. This TCAS-loaded resin was made of a novel supramolecular acceptor compound named thiacalix[4]arenetetrasulfonate(TCAS) and anion exchange resin, and the adsorption mechanism was discussed preliminarily. The results of adsorption indicated that the pH value was an important factor for the removal of dichloroethylene and it would be better for the adsorption if the pH value was greater than 6. The operating temperature should be controlled in 5 to 15°C for the adsorption of dichloroethylene onto TCAS-loaded resin while the removal rate decreased with the temperature increasing and the best time for reaction was 40min. The removal rate of dichloroethylene in aqueous solution was better when 25mL aqueous solution of dichloroethylene (1.0mg/L) was adsorbed by 0.5g TCAS-loaded resin. The dichloroethylene can be resolving and TCAS-loaded resin can be reused.
Geochemistrical Features of Laojunshan Granite and its Evolution in East-South Yunnan, China
Authors: Li Ying Shu , Cai Yan , Chen Jiao Jiao , Chen Nan , Wang Lun , Zhang Yi Ke , He Da Qing
Published: March 2013

Laojunshan granite is located in east-south Yunnan. Study on the geology, petrochemistry, microelement and rare earth elements of the Laojunshan granite indicates that the Laojunshan granite is a complex granite, which is divided into three epoch and various metasomatism within the granite is visible. The content of titanium, iron, magnesium is low and the content of silicon, aluminium, potassium is high in the granite, reflecting the granite is a granite of saturated-aluminium series and speculating mother rock of the granite is mud, psammitic rock. Formation of the granite is related with geological development of Laojunshan area, sedimenting in form of subside in the pre-Caledonian epoch, upheavaling in the late-Caledonian epoch and arising orogeny from the Indo-Chinese epoch to the Yannshan epoch, and undergoing sedimention, regional metamorphism, migmatization, granitization and remelting magma emplacement. Because Laojunshan granite possesses features of autochthonous and parautochthonous transformation type granite, origin of Laojunshan rock body belongs to continental crust alterational and metasomatic remelting granite.
Investigation on Beneficiation Strategy for Collophane
Authors: Cao Qin Bo , Weng Shu Ming , Li Chen Xiu , Bai Shao Jun , Liu Dan
Published: March 2013

Phosphate being one of the three major nutrients required for agricultural plant growth usually presents as collophane in China. Since fine phosphate and other gauge minerals associate with each other and form intergrowth, the beneficiation of collophane is extremely difficult. In this paper, the flotation strategy for a low grade collophane ore from Guizhou province in China was studied in detail. Direct, reverse and direct-reverse combined flotation sheets were employed to collophane flotation. The results reveal that direct-reverse flotation is a suitable flotation flow sheet for this collophane ore. With direct-reverse flotation sheet, the grade of P2O5 in concentrate is 33%, which is improved by 3% comparing direct flotation and P2O5 recovery could achieve 80%. In addition, content of MgO decreased to 0.9%, which satisfied the requirement of wet-process phosphoric acid.
Mining Environment Governance and Sustainable Development of Coal Industry
Authors: Zhou Qiang
Published: March 2013

The environmental pollution is one of the most challenging fields that people has to be faced with. A series of environmental pollution caused by coal mining are closely related to the sustainable development of coal industry and society. Mining environment includes water environment, surrounding rock environment, stress environment, thermal environment, active faults, etc. In this paper, the environmental issues caused by mining and current research results were analyzed and summarized and several research direction of mining environment were put forward according to our national conditions and the consistent development of the coal industry.
Research on Classified Magnetic Separation of Oolitic Hematite from Guizhou Province
Authors: Chen Wen Hui , Zhang Qin , Shen Zhi Hui , Jiang Mao
Published: March 2013

Oolitic hematite is considered to be one of the most refractory ores in the world due to its ultra fine disseminated grain size and complex mineral composition. Various magnetic separation methods were conducted on the oolitic hematite ore samples from Guizhou Province. Because the TFe grades of each size fraction of the grinding products were different from each other, the beneficiation process of “classification – low intensity magnetic separation – high intensity magnetic separation” was finally adopted to guarantee the quality of iron concentrates. After the determined magnetic separation, the relatively good technical indexes are obtained. The TFe grade of iron concentrates is increased from 38.7% to 46.1%, and the iron recovery is 81.7%.
Research on Flotation Tests of Sulfide Copper Ore from Yunan
Authors: Wang Yi Jie , Wen Shu Ming , Liu Jian , Feng Qi Cheng , Lv Meng Yang
Published: March 2013

The mineral processing flow sheet and reagent system of flotation copper minerals from a large copper-iron deposit in Yunnan were fully investigated. The results indicate that the optimum conditions for flotation of copper minerals from the material were identified as grinding fineness of 85%, dosage of CaO at 2000g/t , dosage of Na2S at 200 g/t, dosage of butyl xanthate 40g/t. Under such a condition, a copper recovery of 88.17% with a concentrate grade of 26.86% was achieved from the material using a closed circuit flow sheet of "one-stage roughing flotation, one-stage cleaning flotation and one-stage scavenging flotation.
Study of Lead Flotation Test in Oxide Lead-Zinc Ore
Authors: Yang Jun Long , Liu Quan Jun , Guo Yan Hua , Jiang Mei Guang , Xiao Hong
Published: March 2013

This paper studied an technological process of recovery of Pb and Zn from a difficult to choose high oxidation Lead –Zinc deposit. By mineralogy process study shown, the run-of-mine grade of Lead was 4.09%, with the oxidation rate of 88.26%. The optimal grinding fineness was about to 85.68%. Use the best reagent combination which obtained by condition test, the final results was that the grade of Lead concentrate was 35.6% and the recovery rate was 78.73%, included silver 564 g/t; the grade of the Zinc concentrate was 42.50%, and the recovery rate is 83.65%.
Treatment of Membrane Concentrated “Young” Landfill Leachate by Coagulation Sedimentation
Authors: An Zheng Yang , Xu Xiao Jun
Published: March 2013

A self-made coagulant was applied in the treatment of some membrane concentrated reject of the “young” landfill leachate. The optimum operation diameters were determined by orthogonal and single factor experiments. Under the optimum conditions, the values of COD and ammonia nitrogen of water sample after treatment were 88 mg/L and 10.8 mg/L, respectively, which reached the standard in Pollution Control Standard of Domestic Refuse Landfill GB 16889-2008. Therefore, coagulation method can be applied in the treatment of membrane concentrated “young” landfill leachate to achieve standard discharge.
Study on Technological Mineralogy of a Certain Lead-Zinc Ore
Authors: Li Zheng Yao , Guo Xiao Fan , Liu Jun , Wang Li Li , Li Heng Qian
Published: March 2013

The characteristics of process mineralogy of the some lead-zinc mine were studied with scanning electron microscope, optics microscopes，and x-ray diffraction. The species of lead minerals and zinc minerals and the chemical composition of the minerals were analyzed. The liberations at different grinding finenesses and the particle sizes of the minerals had been also determined. The phase shape of lead and zinc in the ore was also analyzed. The behaviors of various minerals and mineralogical factors affecting the flotation had been explained clearly. The investigation results were favorable to reasonable selection of flotation parameters and would provide theoretical guidance to lead-zinc separation.
The Characteristics of Collapse Columns in Duanwang Minefield and their Influences on Gas Emission Quantities of Coal Faces
Authors: Zhai Xin Xian , Li Xiao Ju , Zhai Yan Wei
Published: March 2013

Duanwang Coal Mine is located at north of Qinshui coalfield in Shanxi province, China, which gently inclined and thick seams have been mined. Authorized production capacity of the coal mine is 1.8Mt/a. With the increase of mining depth, the mine gas emission quantity increased. Karst collapse columns are very developed in the minefield, and the phenomenon of abnormal gas emission always occurred at the coal face and driving gateway around the collapse columns, then the mine became high gassy one from low gassy mine. Using field measurement and theoretical analysis methods, the following conclusion can be drawn. Karst collapse columns have significant influences on gas emission of the coal face and driving gateway. Here are large amount of free form gas into and around the collapse columns, the collapse columns were disclosure while driving gateway, a large amount of the free gas into collapse column would be instantly released, which caused abnormal gas emission at driving gateway, even leading to gas density exceeding limitation by Coal Mine Safety Regulation of China. However, during mining area of the collapse columns, gas emission quantity at coal face was relatively smaller.
Treatment of Pyrite Cinders for Arsenic Removal Using Acid Leaching Process
Authors: Bai Shao Jun , Wen Shu Ming , Zhao He Fei , Cao Qin Bo , Shen Hai Ying , Liu Dian Wen
Published: March 2013

A craft of concentrated acid-heating reinforced leaching process is investigated for the treatment of a high arsenic pyrite cinder, a common by-product in vitriol industry. The pyrite cinder, containing 57.37% Fe, and 2.78% As, was conducted for the acid leaching process. The results demonstrated that iron concentrate with 60.57% Fe, 0.28% As and 96.23% of iron recovery was obtained under the optimal acid leaching conditions(Sulphuric acid concentration is a mass ratio of 20%, a leaching temperature of 60°C, a liquid-solid ratio of 2:1 and a leaching time of 120 min).This craft can be used to utilize pyrite cinder and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of sulfuric acid residue and extend raw material sourcing for Chinese steel industry.
The Processing Method and Progress of Phosphate Resources
Authors: Wang Ju , Dai Hui Xin , Guo Yan Hua
Published: March 2013

The paper briefly introduces the phosphate rock resources situation and the processing method of commonly used phosphate rock. Including flotation, scrub off mud, heavy medium dressing, chemical processing method, biological leaching and other methods.
Development of the Ring Block Drill Pipe Casing Wear Tester and Experimental Research
Authors: Qin Yan Bin , Dou Yi Hua , Wang Xiao Zeng , Yang Jing Wen
Published: March 2013

In deep wells and ultra-deep wells the complex geological conditions often result in serious casing wear. In order to be able to accurately measure the wear efficiency and friction coefficient required in the process of the prediction of casing wear, a ring-block drill pipe and casing wear tester is specifically designed and produced, the scheme of tester is proposed, and the design of structure, driving device, and the detecting system of the friction and contact forces of tester is completed. Adopting the ring block drill pipe casing wear tester and simulating down hole conditions P110 casing wear experiments are finished. The results show that the ring block drill pipe casing wear tester meets the requirement of down hole casing wear experiment. P110 casing wear efficiency decreased with the increasing of wear time. The friction coefficient between the P110 casing and the drill pipe sample is about 0.25.
Influence of Geometrical and Physical Parameters of Cement on Loads of Casing and Cement
Authors: Wang Xiao Zeng , Qu Zhan , Dou Yi Hua
Published: March 2013

A mechanical model of casing, formation and cement is established under the action of the in-situ stress in the cementing section. According to the continuous displacement and radial stress conditions, the calculation formulas of loads applied to casing and cement are developed. The influences of geometrical and physical parameters of cement on loads and stresses of the casing and cement are analyzed. The result shows that the increase of Young’s modulus of cement results in that the casing load increases firstly, and then decreases. The bigger Young’s modulus of cement, the more load of cement. Along with the increase of Poisson's ratio of cement, cement and casing load become bigger. Cement load is greater than the casing one, so it can avoid damaging casing.
Mine Gas Concentration Pre-Warning Based Monitoring Data Relational Analysis
Authors: Dong Ding Wen , Wang Hong Gang , Jia Peng Tao
Published: March 2013

For efficient analysis of mine gas monitoring data to expand monitor system function and realize effective gas pre-warning, the gas concentration pre-warning method based on monitoring data processing was studied. Studying by mine gas monitoring data, its statistical characteristics was abstracted, the intrinsic correlation characteristics of time series consisted by gas monitoring data was also analyzed by using grey relational analysis method. Further, the pre-warning indexes and its thresholds were determined, and the gas concentration abnormal situations could be analyzed, which realized timely and dynamically quantitative pre-warning. The case analysis shows that the method has a better applicability for mine-site gas concentration pre-warning, which can offer the effective decision for daily safe management.
Preparation and Inhibition Characteristic of Multi-Phase Foamed Gel for Preventing Spontaneous Combustion of Coal
Authors: Qin Bo Tao , Zhang Lei Lin , Lu Yi
Published: March 2013

In order to prevent the spontaneous combustion of coal efficaciously, a kind of new compound material of multi-phase foamed gel, which is based on three-phase foam, composed of foaming agent, thickener, fly ash and nitrogen and formed by physical and mechanical stirring, is proposed. It makes use of the all-around capability of gel and three-phase foam to prevent mine fire. The effects of the mass fraction of foaming agent and slurry, the quantitative ratio of polymers and concentration on foam properties had been carried out. The results show that the properties of multi-phase foamed gel are the best when the mass fraction of foaming agent, polymers and slurry were 4‰, 6‰(the quantitative ratio was 1:1) and 16.66%(water cement ratio was 5:1). In addition, the inhibition characteristic of multi-phase foamed gel was studied experimentally and theoretically.
Overview of Bauxite Selective Dissociation in China
Authors: Zeng Shu Qin , Zhang Xiao Lin , Cao Shi Ming , Zhao Wen Juan , Wen Ya , Mao Ying Bo , Xu Guo Yin
Published: March 2013

This paper introduces the survey of bauxite resources in China, analyses the basal principle of selective dissociation, then details dissociation process flow and selective grinding, finally prospects the future development of bauxite selective dissociation.
Performance Test and Flow Pattern Simulation of Small Diameter Thermosyphons
Authors: Zhao Shu Lei , Ding Xiao Tian , Wei Zheng Yuan , Liu Gui Fang
Published: March 2013

Thermal transfer behavior of small diameter thermosyphons with different fill ratio, the inner and outer temperature response at start-up, and the calculated vapor-liquid two-phase vertical flow regimes were studied. The thermosyphons were fabricated by different diameter glass tubes. The present study suggests that the best thermal conductive performance is obtained with 26% fill ratio. Inner and outer thermal behaviors were experimentally studied with innovative methods of attaching thermocouples on thermosyphon walls from both inside and outside. Experimental results indicated a very good temperature uniformity of thermosyphons. Furthermore, a 2D, planar CFD modeling using explicit Multi-Fluid VOF model in the Eulerian multiphase model was carried out to model the interaction/interface between gas and liquid as well as fluid flow movement inside the tube. Real-time vapor bubble generation, combination and vapor slug maps were derived from the simulation. A good agreement was observed between CFD acquired data and experimental observations. It is evidenced that CFD is a powerful tool to model and examine the complex flow and heat transfer in a thermosyphon.
Actualizing Quality Engineering, Constructing Characteristic Specialty
Authors: Wang Dong Feng , Mao Xiang Zhao , Lin Hong , Xue Chang Hu
Published: March 2013

College of Food Science and Engineering of Ocean University of China grew out of the processing of aquatic food product of Shandong University. The specialty of food science and engineering was awarded national characteristic specialty at 2010. This paper suggests construction mentality and aims surrounding the national characteristic specialty.
Research on Environment Management Index System of Iron and Steel Industry
Authors: Zou Yan Yan , Wang Ya Dong , Luo Xing Xing
Published: March 2013

This paper summarized the meaning and characteristics of the environment management index system by probing into the research about the present environment management and related fields, and put forward the evaluation environment management index system of the iron and steel industry, and finally proposed the method of fuzzy comprehensive evaluation used to evaluate index system of the environment management.
Application of OPENID Site Certification Technology in Management System of Perforation Information
Authors: Wang Hui , Li Guo Jia , Pan Jun Hui
Published: March 2013

All kinds of operations to the wells data from Daqing oilfield, oil wells data and user information, which are included in the management system of perforation information. Traditional network password authentication is very easy to be rent asunder. The results show that user authentication based on OpenID is one of high safety levels and better network authentication patterns, the safe and new network identity authentication method is required, which could effectively prevent the leakage of oil wells data and user information, phishing, network deception, hacker’s crack and so on.