bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Na2CO3 on Hydration Resistance of MgO-Al-C Bricks
Authors: Ji Xiu Mei , Wei Jun Cong , Huang Jian Kun , Gao Chun Hui , Tu Jun Bo
Published: March 2013

To improve the hydration resistance of MgO-Al-C bricks, Na2CO3 was chosen as an additive through thermodynamic calculation. MgO-Al-C refractories were prepared by using Si, Na2CO3 or both as additives. The effects of additives on the hydration resistance of specimens were investigated. XRD was conducted to determine the phase composition. The results showed that the hydration resistance of MgO-Al-C bricks would be improved slightly with addition of only Si due to the densification of the structure. When Na2CO3 and Si were added together, the hydration resistance would be improved remarkably. The mechanism is that Na2CO3 could decompose to give off O2 during heating, which could promote the oxidation of Al metal and inhibit the formation of Al4C3 and AlN.
Influence of Sewage Sludge on the Slurrying Properties and Co-Gasification Kinetics of Coal-Sludge Slurries
Authors: Zhu Bang Yang , Li Han Xu , Yao Jie , Liu Qiao , Zhang Zi Li , Cao Xiang
Published: March 2013

The feature of coal-sludge slurries(CSSs) were studied by mixing Shenhua coal and sewage sludge collected from Huainan sewage treatment plant. The results showed that, the rheological properties of CSSs prepared with the adding dosage from 0 to 15% were the shearing and diluting feature. With the adding dosages of the sludge increase, the apparent viscosity values increased and the maximum solid concentrations of CSSs decreased. Also, the gasification kinetics were studied by Thermogravimetry-Fourier Transform Infrared(TG-FTIR). The gasification starting temperatures and activation energy decreased with the adding dosages of the sludge increase, it indicated that the process was accelerated by sewage sludge.
Effect of CNTs Content on Properties of AlN-CNTs Composite Ceramic
Authors: Liu Qiu Xiang , Dong Gui Xia , Wang Jiang Yuan
Published: March 2013

AlN-CNTs composites were prepared by using hot pressed sintering. The microstructure of AlN-CNTs composites was observed by scanning electron microscope (SEM), and the dielectric property and thermal conductivity were measured using LCR and other specialized instruments. The experimental results showed that the variation of the electrical resistivity was consistent with the percolation theory, with the percolation threshold of the samples at about 1.4% CNTs, and that with increase of CNTs content both the dielectric constant and dielectric loss rise up, whereas the thermal conductivity goes down
Artificial-Neural-Network Prediction of Device Behaviors in Submicron MOS Transistors
Authors: Chen Shen Li , Chen Ying Der
Published: March 2013

A new technique is presented for modeling submicron MOSFET devices and predicting the MOSFET device behaviors by using fuzzy theory and artificial neural network (ANN). The power of ANNs used as a realization of I-V characterizations is demonstrated on the submicron MOS transistors. The prediction results are compared with experimental data of the actual devices and obtained a good agreement under different bias situations.
The Junction Width Effect on Inelastic Electron Tunneling Spectroscopy in Octanethiolate Molecular Junctions
Authors: Leng Jian Cai , Ma Hong , Ma Yong
Published: March 2013

First-principles investigation on the inelastic electron tunneling spectra of octanethiolate molecular junctions is performed. It is demonstrated that the inelastic electron tunneling spectra are very sensitive to the molecular junction width. The varied peak height mainly caused by the different coupling energy between the electrode and molecule.
The Effect of Oxygen-Rich Condition on Properties of ZnO: In Films by Sputtering
Authors: Li Hui , Feng Hai Tao , Zhang Fang Hui , Liu Yun , Xie Er Qing
Published: March 2013

Indium doped zinc oxide (ZnO:In) films were prepared in oxygen-rich condition by direct current(DC) reactive magnetron sputtering. The X-ray diffraction(XRD) pattern presented that the crystal quality of ZnO:In films was improved by the introduction of nitrogen into ambience, meanwhile the element constituent was investigated by X-Ray photoelectron spectroscopy(XPS). The photoluminescence(PL) spectra showed the visible emission was originated from two different defects. The current-voltage characteristic and persistent photoconductivity(PPC) phenomena were also explained, when the oxygen vacancies(VO) may act trap centers in persistent photoconductivity.
Theoretical Study on Au-Doped Ge Semiconductor Clusters
Authors: Li Xiao Jun
Published: March 2013

Structure, electronic property, aromaticity and vibrational frequency of medium-sized Au-doped germanium clusters were systematically explored using the density-functional theory (DFT) in conjunction with the LanL2DZ basis set. Our results show that the endohedrally Au-doped cagelike structures are energetically preferred. The p- and d-states in endohedral Au atom mainly contribute to the chemical bonding at around −6.5 and −10.6 eV for the AuGe10 and AuGe12 clusters. Moreover, the cage aromaticity appears to be an important determination of the electronic stability of the two clusters, reflected by negative nucleus-independent chemical shifts (NICS) values. The theoretical work will be useful and helpful for the understanding in the further application, i.e., cluster-assembled optoelectronic nanomaterials.
The Durability of Water and Oil Repellent Finishing of Cotton Fabrics with Isocyanate
Authors: Zhang Dian Wei , Cui Yong Zhu , Xiao Wang , Liu Guo Jun
Published: March 2013

The cotton fabrics was treated with the blending of organic fluorine water and oil repellent finishing agent and cross-linking agent. The contact angle to water was over 120°and that to oil was above 110°after the fabrics were washed 20 times, indicating that the water and oil repellent properties and durability of fabrics were excellent. And the technology was optimized as follows: the water and oil repellent finishing agent 50g/L, cross-linking agent 4g/L, curing temperature 150°C and curing time 200s.
The Effect of Polymethyl Methacrylate（PMMA）for the Fabrication of Polyacrylonitrile (PAN) Fiber
Authors: Lin Hui Min , Rong Hai Qin , Zhao Shu Hui
Published: March 2013

The effect of polymethyl methacrylate (PMMA) was investigated for the fabrication of polyacrylonitrile (PAN) fiber. At the same time,the content of polymethyl methacrylate, the ratio of PMMA to PAN, the rheological properties of spinning dope，the mechanical properties and thermal performance of original silk were also characterized. Based on the research, when the content of PMMA is 5%, the ratio of PMMA to PAN is 7:3, it’s the suitable condition for spinning, and the original fiber have excellent properties.
Synthesis and Crystal Structure of a Fe(II,III) Complex with 2-(4΄-Chlorine-benzoyl)-benzoic acid and 3-(2-Pyridyl)pyrazole
Authors: Wang Qing Wei , Lu Ting Feng , Guo Jia , Li Xiu Mei
Published: March 2013

A new metal-organic complex FeII2FeIII2(cbba)4(L)6 (Hcbba = 2-(4΄-chlorine-benzoyl) benzoic acid, L = 3-(2-pyridyl)pyrazole) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, TG and IR spectroscopy. The compound crystallizes in monoclinic, space group Cc with a = 17.729(5), b = 15.919(5), c = 33.650(5) Å, β = 92.058(5)°, V = 9491(4) Å3, C104H68Cl4Fe4N18O12, Mr = 2126.96, Dc = 1.489 g/cm3, μ(MoKα) = 0.786 mm1, F(000) = 4344, Z = 4, the final R = 0.0559 and wR = 0.1122 for 12093 observed reflections (I > 2(I)).
Electrochemical Properties of GaCl3 in Ionic Liquid [C2mim][GaCl4]
Authors: Jin Yi
Published: March 2013

Under dry argon atmosphere, the colourless and transparent ionic liquid [C2mim][GaCl4] was synthesized. Using [C2mim][GaCl4] as solvent, a solution of GaCl3with molarity 5.227×10-3 mol/cm3 was prepared at 303.15 K and there is a equilibrum between the solute and the solvent: GaCl3+ [C2mim][GaCl4] → [C2mim][Ga2Cl7]. The cyclic voltammogram of the solution had been carried out relative to Al/Al3+reference electrode, with GC working electrode and Ga counter electrode, with various scan rates from 30 to 700mV/s, in a temperature range of 303.15 to 343.15 K, respectively. The results indicated that (1) there were two processes: Ga(Ⅲ)→Ga(I)→Ga(0), which corresponded to the double reduction peaks in the cyclic voltammogram; (2) the first reduction process was a diffusion controlled and quasi-reversible process. Plotting current density of the peak vs the square root of scan rate, a series of straight lines were obtained, then the diffusion coefficients were obtained according to Randles-Sevcik equation in various temperature. The values of diffusion coefficient were fitted to Arrhenius equation with least-square method and value of diffusion activation energy, ED = 41.5 kJ/mol, was obtained from Arrhenius slope.
Hydrothermal Synthesis and Crystal Structure of a Cadmium Complex
Authors: Tong Shao Wei , Guo Jian , Song Wen Dong , An Jing Bo
Published: March 2013

A new coordination polymer based on cadmium nitrate and 2-（4-pyridyl-1H-benzimidazole- 5,6-dicarboxylate (H2pbd) , namely [Cd( pbd)2•(H2O)2]n•n(H2O)2, have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction. The crystal of the complex crystallizes in triclinic, space group P-1 with a = 7.7200 Å, b = 8.1029Å, c = 13.0801Å, α= 96.1270(10) º, β = 102.1280(10)º, γ= 112.479(2) º, V = 723.15(12) Å3, Z =1, C28 H22 Cd N6 O12 and F(000) = 376.0. The H2pbd ligands links the Cd(II) atoms into a double stranded chain.
Application and Research Progress on Eco-Cement
Authors: Zhang Li Hua
Published: March 2013

The forming background, properties and classification of eco-cement as well as it’s characteristics are systematically expatiated in this paper and the application and research progress of eco-cement in and abroad are introduced. The domestic research status of eco-cement and some presently existing problems are analyzed and discussed. It’s believed that there are good prospect of eco-cement in our country, much more attention should be paid on the problem which conclude security production, exhaust gas emission and environmental pollution control regulations of the eco-cement production. In the development of eco-cement industry, it’s necessary to consider the factors of environment and city construction for the industrial plan. Furthermore, the performance and application field of eco-cement still have to be improved.
Study on Disinfection of Oilfield Wastewater
Authors: Lin Hong Yan , Wang Chun Cai , Kan Lian Bao
Published: March 2013

The suitability of Daqing oilfield wastewater disinfection by electrolysis technology was analyzed. The results show that electrolysis disinfection method is applicable to the water quality of Daqing oilfield. The effect of current, wastewater flow, and electrolysis time on the disinfection effect and power consumption was studied. The results show that the disinfection effect is good and economical for Daqing oilfield wastewater when the current is 2A and the flow is 40L/h.
Influence of Blast Furnace Slag on the Mechanical Properties of High Performance Concrete
Authors: Park Wan Shin , Cho Sung Ho , Yun Song Hui , Kim Jeong Eun , Kim Do Gyeum , Noh Jea Myoung
Published: March 2013

The characteristics of the compressive strength and splitting tensile strength according to replacement ratio of the blast furnace slag were found in this study. The blast furnace slag was utilizes as the concrete mix-material and then, these results were compared with the basis presented in the international standards. In this study, cylinder made of concrete with water/binder ratio 0.34 and blast furnace slag replacement rate of 10%, 30%, 50%, and 70% were prepared to measure the compressive strength and spiting tensile strength. Test results indicate that The 28 days and 91 days compressive strength is affected by blast furnace slag replacement except specimen BS30 and the splitting tensile strength in specimen BS series is slightly larger than that of OPC except specimen BS 30.
Research on Evaluation Index of Water Stability for Asphalt Mixtures
Authors: Sun Zhao Hui , Yang Guo Feng , Wang Tie Bin , Wang Zhi Song
Published: March 2013

Aiming at the deficiency of the water stability evaluation index of bituminous mixtures by immersion Marshall test in present specifications in china, the water stability of various of bituminous mixtures test pieces was analyzed by comparing freeze-thaw splitting tensile tests with immersion Marshall stability tests. There is larger difference between the evaluation results of immersion Marshall test and freeze-thaw splitting tensile test. The residual stability by immersion Marshall test is rarely inconsistent with regulatory requirements, Residual modulus is brought up to evaluate the water stability of bituminous mixtures. Residual modulus suggested to evaluate the water stability of asphalt mixtures has the similar trend with freeze-thaw splitting tensile strength ratio and the residual modulus threshold valve 0.85 is recommended.
A Brief Discussion on Settlement Pattern of Ancient Village in Jiajiazhuang
Authors: Cheng Yan Hong , Wang Jin Ping
Published: March 2013

Ancient settlement refers to an agriculture-based village formed by surrounding natural environmental conditions, with agriculture as the main economic activity. As the product of natural adjustment, utilization and transformation, settlement is the crystallization of human cultural development, which significantly reflected local economic development level, local customs, etc. Based on field investigation and analysis of relevant literatures, the paper generalized overall pattern and development course of ancient post road in Jiajiazhuang, and summarized overall layout and functional characteristics of dwellings and temples in Jiajiazhuang with Guoshiqi Courtyard and Temples to the Three Progenitors (Sanhuang Miao) as examples. The paper is of profound significance to the understanding of dwelling architectures in Shanxi, and restoration and protection of ancient settlement.
Failure Analysis of Pin Joint of Carbon/Epoxy Composite Plate
Authors: Kottner Radek , Bek Lukáš , Krystek Jan , Kroupa Tomáš , Lašová Václava
Published: March 2013

This paper deals with the failure analysis of a carbon fibre reinforced plastic (CFRP) plate which is joined to a structure using a steel pin. The analysis was carried out experimentally and numerically using the finite element method (FEM) system MSC.Marc. The Puck´s failure criterion for 3D stress state was used after its implementation into the MSC.Marc system. Experimental specimens were symmetrical laminates with 8 layers. A special experimental device which allowed monitoring of all visible changes of the experimental specimens with cameras was designed. This device was installed into the testing machine Zwick/Roell Z050. Obtained images were evaluated using the digital image correlation technique. Moreover, the vibrations in the surroundings of the specimens were measured to detect acoustic emissions which occur during damage.
Fracture Analysis of GCr15 Steel Ball Screw Nut
Authors: Wang Qian , Li Mu Sen , Ding Xia , Li Bao Min , Dong Qing Xin
Published: March 2013

This paper dealt with the fracture failure of a GCr15 steel ball screw nut. Through testing and analysis of hardness, microstructure, scanning electron microscopy and energy dispersive spectrum meter, it was found that there are local carbide network, few oversized carbide particles and metallic inclusions. The analysis showed that carbide network was failed to be eliminated through spheroidizing annealing treatment, while the presence of non-uniform carbide particles and metallic inclusions easily induced the crack and consequently led to the fracture of the nut.
Effect of Die Forms on Rivet Deformation and Microstructure
Authors: Deng Jiang Hua , Tang Chao , Zhan Yan Ran , Jiang Xing Ying
Published: March 2013

In order to solve the problem of rivet head tending to crack in riveting, the effect of die forms on TA1 rivet deformation and microstructure was investigated by experimental method from macro and micro aspects in electromagnetic riveting. The results show that rivet material axial and radial flow can be controlled using different die forms, and thus the distribution of adiabatic shear band and grains in two sides of that in formed rivet head can be changed. With flat head die, severe axial and radial flows result in the nonuniform deformation and crack is prone to produced in rivet head. The adiabatic shear band of rivet head is obvious and grains in both sides of that deform severely. Material radial flows of rivet head are well constrained by spherical and 400 head die. The deformations are relatively uniform and the adiabatic shear bands are not obvious. It is an effective way to avoid crack formation and improve riveting quality using different die forms.
Investigation on Forming Process of Automobile Trunk Side Panel Based on Numerical Simulation Technology
Authors: Li Hai Peng , Fan Jia Wei , Wang Li Hui , Wang Xue Xia , Zhao Ju Yuan
Published: March 2013

The forming process of automobile trunk side panel was investigated, using numerical simulation technology, to acquire the feasible process parameters and improve the formability of the product. With the technology, the manufacturability working procedures and drawing process parameters of the product were analyzed, calculated and simulated to achieve optimum formability characteristics. The method effectively lowers the probability of springback, wrinkling and thickness reduction, and shortens design cycle and cost. Based on the simulation results including forming limit diagram and thickness distribution diagram, the feasible process parameters are determined.
Research on Intelligent Precise Pass Design Based on Spline Finite Strip Method
Authors: Li Guo Chang
Published: March 2013

Enterprises have been looking forward to breakthroughs of compound cold rolled section steel precise pass design algorithm for a long time; the breakthroughs will enlarge the application area of cold rolled steel. However, further study of stress and strain cannot effectively conduct pass design algorithm, the theory research and pass design have bottlenecks. Use spline finite strip method to guide pass design, with artificial intelligence correction, we can gen precise pass design method. These researches will offer theoretical foundation to precise pass design and pass software design.
The Relationship between Phase Structure and Melting Characteristics of High Cesium Content KF-CsF-AlF3 Aluminum Flux
Authors: Cheng Fang Jie , Yang Jun Xiang , Zhao Hai Wei , Zhang Guan Xing , Huang Jun Lan , Long Wei Min
Published: March 2013

The melting curves of high cesium content KF-CsF-AlF3 flux samples prepared by the wetting synthesis method were measured by differential scanning calorimetry (DSC), and the effect of the flux compositions on the melting characteristics was analyzed and summarized. Existing phases of every representation sample was identified by X-ray diffraction (XRD), meanwhile, the morphology and chemical elements of the typical flux samples were analyzed by scanning electron microscope (SEM) and energy spectrum analysis (EDS), respectively. The results indicated that solid phase decomposition first occurred in the common phase Cs2AlF5 for all the flux samples at 420°C; one of the decomposition products, Cs3AlF6 take the eutectic reaction with the Cs2KAlF6 at about 450°C; the flux samples containing phase CsAl2F7 or Cs2KAl3F12 have the e5 and e1 eutectic reaction at 471°C and 525°C, respectively, and their liquidus increased correspondingly. The liquidus for regionⅠflux samples is about 450°C and with a narrow melting range, which would make them good substrates for aluminum alloy middle temperature brazing.
Corrosion Behavior of Alloys for Hot Dipping
Authors: Wang You Bin , Zeng Jian Min
Published: March 2013

The corrosion property of three currently used hot dipped alloys (Al-8Si, Zn-0.6Ni and 55Al-Zn-Si) immersed in 3.5% NaCl solution were studied by analyzing the open circuit potential variation with time and electrochemical impedance spectroscopy (EIS) tests. The open circuit potential of the Al-8Si alloy is 100mV higher than the potential of Zn-0.6Ni and 55Al-Zn-Si, and the potential of Zn-0.6Ni is approach to the 55Al-Zn-Si alloy. The phase angles of the Al-8Si, 55Al-Zn-Si and Zn-0.6Ni are close to -80°,-70°,-60°, and the high impedance values at low frequencies are 105,104,103 Ω cm2, respectively. The EIS spectra of the alloys indicated two relaxation time constants. An “equivalent circuit” with the circuit elements representing the electrochemical properties was proposed to simulate the EIS spectra, and the simulated dates were in a good agreement with the experiment dates. The polarization resistance (Rp) of Al-8Si, 55Al-Zn-Si and Zn-0.6Ni are 18000, 2010, 251 Ω•cm-2, respectively. The results showed that the corrosion property of Al-8Si is well than the other alloys in the test solution.
Facile Method to Prepare Superhydrophobic High-Density Polyethylene Coating
Authors: Fu Xin , Gong Hui Fang , Xiao Xi Mei
Published: March 2013

A superhydrophobic HDPE coating was obtained by a facile but yet effective way. The water contact angle and sliding angle of the superhydrophobic HDPE coating were 156±1.9ºand 3±1.6º, respectively. The HDPE coating was still superhydrophobic contacting with acid, alkali, salt aqueous solutions.
Chemical Bonding Characteristics of Lanthanide Complexes: a Case of Valence Study
Authors: Zhang Huan , Zhang Xu , Ma Jun Guo
Published: March 2013

A number of newly Ln-N bond valence parameters were quantitatively estimated, which allowed us to obtain all Ln-N bond lengths with different coordination numbers in metal organic complexes. Twenty linear correlations among the mean bond valence parameters of Ln-O, Ln-N, Ln-S, Ln-Cl and Ln-C bonds of metal organic complexes have been well established and denoted by a set of linearity equations, which provides us a useful method to determine the bond valence parameters of other type Ln-atom bonds in coordination chemistry. The present work shows us a novel approach to deeply understand the chemical bonding characteristics between Ln and the ligands in various metal organic complexes.
Study on Anti-Thermal-Fatigue Property and Mechanism of 8407 Steel with Surface Aluminization and Oxidation Treatment
Authors: Sun Jian
Published: March 2013

Thermal fatigue test was performed with cycle heating method to compare thermal fatigue behaviors of 8407 steel samples with and without aluminization and oxidation treatment. Thermal fatigue crack morphology formed on the surface was observed by SEM. The anti-thermal-fatigue mechanism of Fe3O4•Al2O3 complex oxide was clarified. The results show that, the formed oxide film with surface aluminization and oxidation treatment of 8407 steel is compact and has higher strength and hardness, which can improve both the initiating resistance and propagating resistance of thermal fatigue crack, thus improving anti-thermal-fatigue property of 8407 steel.
Novel Synthesis and Characterization of Titanium Carbide Coatings on Graphite Flakes
Authors: Ding Jun , Yuan Wen Jie , Deng Cheng Ji , Zhu Hong Xi
Published: March 2013

Titanium carbide coatings were synthesized by reacting with titanium powders in NaF-NaCl based salt on surface of graphite at 1100-1400 °C in argon (Ar). The effect of temperature of heat treatment on TiC coatings properties was studied. Phase composition and microstructure of the TiC coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray spectroscopy (EDS). The “template-growth” mechanism plays a dominant role in the coating formation process.
Influence on Concentration of Magnetite with Changing of Fe3+/Fe2+ in Copper Slag
Authors: Jiang Long Kui
Published: March 2013

Large number of available resource is in the copper slag, which includes oxides of copper and oxides of iron. The total iron in copper slag is usually above 35%, and iron element in copper slag are mainly distributed in olivine phase and magnetic iron oxide minerals. Because minerals in copper slag embedded with each other and the grain of minerals in copper slag are very small, so it is very difficult to recover iron from the copper slag by means of traditional separation technology. Based on the characteristics of copper slag, iron in copper slag can selectively be gathered to magnetite phase through the melted copper slag is processed, and the size of grain of magnetite grows up by adopting appropriate measure to control the reaction temperature. With magnetic separation technology, the magnetite (Fe3O4) can be gotten which contains more total iron.
Study on Surface Dispersion and Topography of Ceria Supported on γ-Alumina
Authors: Yu Qing Chun , Yan Chun Pei , Deng Yong , Wang Fei
Published: March 2013

The active ingredient of catalysts is generally dispersed on porous supports of inert metal oxides to augment its catalytic activity. In this paper, the dispersion and topography of CeO2 supported on γ-Al2O3 was studied by means of XRD. The monolayer coverage of CeO2 was determined by internal-standard method with NiO reference material. Highly dispersed CeO2 would appear and encapsulate outside theγ-Al2O3 support surface evenly when CeO2 loading was below its monolayer coverage; above the monolayer coverage, crystalline CeO2 would appear.
Calculation Model of Mass Action Concentration for CaO-B2O3-SiO2 Slag System
Authors: Wang Hong Ming , Zhu Xiang , Li Gui Rong
Published: March 2013

According to the coexistence theory of melted slag structure, a calculation model of mass action concentrations for CaO-B2O3-SiO2 slag system has been established, by which the mass action concentrations of all structure units in CaO-B2O3-SiO2 systems are calculated. The results indicate that the activities of CaO and 2CaO•SiO2 can be decreased effectively by B2O3. Furthermore, when the slag basicity is higher than 2.0, the activity of 2CaO•SiO2 increases firstly and then decreases with the increasing of B2O3 content. The activity of CaO increases with the increasing of slag basicity. When the basicity is less than 2.2, the activity of 2CaO•SiO2 increases with the increase of slag basicity. Moreover, when the basicity is 2.2, the activity of 2CaO•SiO2 reaches the maximum value. In another word, the activity of 2CaO•SiO2 decreases with the increase of slag basicity on the condition that the slag basicity exceeds 2.2. B2O3 exists in the slag in the form of CaO•B2O3, 2CaO•B2O3 and 3CaO•B2O3.
Cognition on the Molten Blast Furnace Slag Granulation Techniques in Contemporary China
Authors: Li Lin , Ma Guang Xiao , Wang Dai Jun , Zang Ruo Yu , Li Yong Qi
Published: March 2013

Introduce characters and applications of granulation techniques of the molten blast furnace slag in contemporary China, describe characters and design ideas of two types of granulation boxes, represent three types of circulating granulation water systems, put forward matching proposal between the molten slag granulation system and the circulating granulation water system, analyze contemporary research and problems of waste heat recovery of the molten BF slag.
The Study of Nitrogen Solubility in High Nitrogen Steels Smelted with High Pressure and Bottom-Blowing Nitrogen
Authors: Wang Shu Huan , Chen Long , Zhao Ding Guo , Li Chen Xiao , Wu Yan Hui
Published: March 2013

The experiments of smelting high nitrogen nickel-free stainless steel were carried out in the high temperature and high pressure reaction kettle. The nitrogen content was more than 1.36% by using the method of high pressure and bottom blowing nitrogen. With controlling high pressure nitrogen atmosphere and bottom blowing nitrogen, internal react were investigated by single factor experiment. Experimental results shown that there is saturated solubility, while smelting 18Mn18CrN steel with high pressure and bottom blowing nitrogen. Thermodynamic calculation model nitrogen solubility under the condition of high pressure was established, and the influence of nitrogen partial pressure on saturated solubility was researched.
Effect of Out-Phase Electromagnetic Field on the HDC Casting Process of Commercial Aluminum
Authors: Zhu Qing Feng , Zhao Zhi Hao , Wang Xiang Jie , Cui Jian Zhong
Published: March 2013

Commercial aluminum ingot with the diameters of 100 mm is produced by conventional out-phase electromagnetic field HDC casting process. The out-phase electromagnetic field is applied on the HDC casting process. The effect of out-phase electromagnetic filed on the ingot surface and structure is investigated. The result shows that the out-phase electromagnetic field is more effective in improving the upper surface, while, has little function on the bottom surface. The macro/microstructure of the ingot is changed by the out-phase electromagnetic field. Very long and coarse columnar grains evolve to short and thin columnar grains with the application of the out-phase electromagnetic field.
Experimental Investigation of Indium Extraction by Sulfuric Acid Precure Pressure-Atmospheriation Leaching from Tin Dust
Authors: Jiang Yan , Xie Gan , Xiao Rui Min , Huang Du Shu , Li Zi Jing , Sun Li Da
Published: March 2013

Sulfuric Acid precure Pressure-atmospheriation leaching process from tin dust was studied. The factors had been investigated,which effects indium leaching rate,the factors are :the sulfuric acid initial temperature, curing time of heat, acid dosage, leaching reaction time, leaching temperature, the liquid-solid ratio and so on.The results show that the indium, zinc and tin leaching rate can be 96.68%, 97.70% and 0.52%,while pressure-atmospheriation leaching is carried out under the initial temperature 140°C,sulfuric acid, the time of heat aging 40 min, acid dosage and tin of tobacco smoke mass ratio0.7:1, leaching time 1.5h, leaching temperature 90°C,and the liquid-solid ratio 4:1 conditions.
Extraction of Vanadium in the Comprehensive Recycling of Spent Al2O3-Based Catalyst
Authors: Shao Yan Hai , Li Ming Ming , Tong Xiong
Published: March 2013

Under the premise of comprehensive recycling valuable metals, a novel technology was developed to extract vanadium from spent Al2O3-based catalyst. Mixture of spent catalyst and sodium carbonate was roasted at 1000°C for 30 min with the mol ratio of Na2O to (Al2O3 + V2O5 + MoO3) as 1.15, after water leaching, 97.3% of vanadium could be extracted. With CaO addition of 25 g/L and reacting at 90°C for 4 h, 98.6% of vanadium in sodium aluminate solution was precipitated as desilication residue. The desilication residue was leached at 80°C for 45 min with sodium bicarbonate concentration of 100 g/L and L/S of 4 mL/g, over 96.4% of vanadium could be leached. By two purification steps with addition of 30 wt.% H2SO4 and Mg(NO3)2, respectively, over 99% of Al, 96% of Si, 93% of P and 95% of As were removed from leach liquor. Adding 50 g/L NH4NO3 to the purified leach liquor and adjusting pH to 8.2, 99.8% of vanadium could be precipitated as ammonium metavanadate. After calcination, the purity of V2O5 product was 98.25%. In the whole process, up to 88.7% of vanadium could be recovered from the spent catalyst.
Review of Arsenic Pollution and Treatment Progress in Nonferrous Metallurgy Industry
Authors: Yang Bo , Zhang Geng Lin , Deng Wen , Ma Juan
Published: March 2013

Arsenic pollution in nonferrous metallurgy industry and its control and utility techniques were summarized. The arsenic emission from the process of metallurgy industrial production, which is main sources of Arsenic pollution, is harmful to environment. The treating methods and the present utilization of As-containing soil, slag and tailings, dust and As-contaminated wastewater are introduced in this paper. And also the development and application and future development of Arsenic products are indicated. Furthermore, it points out promising directions for the treatment of As -containing materials. With the development of nonferrous metallurgy industry, new technology should be developed to reduce the production of harmful substance and the consumption of energy. Besides, we should learn excellent production experience from other countries, and try to make use of the secondary resources.
Study on Mineral Separation-Metallurgy Process of Ferro-Nickel Concentrate Prepared from Laterite Ore
Authors: Xiong Xue Liang , Yang Zhi
Published: March 2013

A new mineral processing and metallurgy technology was proposed, which was that the ferro-nickel concentrate was prepared from laterite ore by coal-based direct reduction. Under the reduction of cheap reductant and the catalysis of composite additives, the effects of coal-based direct reduction were enhanced and the ferro-nickel was extracted. The optimal conditions were followed that the alkalinity was 0.87, and the roasting temperature was 1150°C, and the roasting time is 2.5 hours. The recovery rate of nickel was 86.7% and the nickel content of ferro-nickel concentrate was 5.3%.
Analysis of the Relative Position of the Slope and Underground Mining Area and its Influence Properties
Authors: Sun Shi Guo , Yang Hong , Li Chun Sheng , Zhang Bao Lin , Wang Jia , Wang Ming Zhu
Published: March 2013

The stability state of slope rock mass is relating to each other’s relative location during the transformation from open-pit to underground mining, it’s the most disadvantageous influence on the slope stability when the underground mining area is located in the toe of slope, and it’s the best influence as in the slope extracellular region. Slope stability factor changes with the geometric dimensions of underground mining increased, but not in direct proportion. Under the condition of constant geometric dimensions of mining area, the influence on slope stability is changing with the mining depth increased. Thus indicating that the influence on slope stability by underground mining has its spatial property, and to determine the specific influence value requires a combination of many factors, such as the relationship of relative spatial position, the geometric dimensions of mining area, engineering geological conditions and so on.
Comparison Tests between Magnetic Roasting in a Fluidized Bed and Magnetic Roasting in a Fixed Bed
Authors: Zhang Yu Shu , Chen Chao , Liu Ya Chuan , Yang Yao Hui
Published: March 2013

This paper discussed the roles of magnetic roasting and the main factors that affect magnetic roasting. Mechanism research of magnetic roasting shows that feed size, roasting temperature, reducing atmosphere and roasting time are the main four factors. Comparison tests of magnetic roasting in a fluidized bed or in a fixed bed have been done. The results show that the appropriate feed size and reducing atmosphere play an important role in roasting. The roasting temperature in a fluidized bed is lower than that in a fixed bed and the roasting time in a fluidized bed is much less than that in a fixed bed. As a result, roasting in a fluidized bed has a higher efficiency of heat and mass transfer than that in a fixed bed.
Flocculation Performance of Trimethoxysilane Modified Polymer Flocculant for Wastewater from Effluent A/O Bioreactor
Authors: Zhu Fang , Shi Chang Miao , Cheng Chang
Published: March 2013

A Trimethoxysilane modified polymer flocculant (PMCAD) was synthesized and applied in wastewater from effluent A/O bioreactor. The turbidity removal, color removal and zeta potential of flocculant PMCAD were determined through the treatment of coking wastewater from A/O bioreactor. Results showed that flocculant PMCAD was more efficient for turbidity removal than that of PAM. The largest removal rates of turbidity and color were 94.44 % and 67.78 % respectively at the dosage PMCAD of 200 mg/L at pH 7. the zeta potential of flocs for coking wastewater increased as the PMCAD dosage increased from 100 to 600 mg/L at pH 7.
Experiment Research on Copper Zinc Mixed Flotation
Authors: Jiang Mei Guang , Liu Quan Jun , Xiao Hong , Yang Jun Long
Published: March 2013

the major elements of the copper sulfide tin ore are Copper, tin and zinc, The grade of copper is 1.22%,as chalcopyrite and copper sulfide tin ore exists in the ore, the grade of tin is 1.19%,With gray tin and tin exists in the stone, the grade of zinc is 1.27%, Zinc is mainly in sphalerite,it is not easy separation Because ore structure is complex, due to the flotability of copper zinc is similar, The first with prior flotation method choose copper zinc mixed concentrate, Use re-election for tin enrichment, The last is copper zinc separation flotation.
Experimental Study on Removal of Arsenic from Sulfuric-Acid Residue of High-Arsenic
Authors: Zhao He Fei , Wen Shu Ming , Bai Shao Jun , Chen Ci Yun , Feng Qi Cheng
Published: March 2013

The experimental study on removal of arsenic from sulfuric-acid residue of high-arsenic was conducted in this paper. Reduction roasting–magnetic separation and sulfuric acid leaching were discussed, and the results showed that the harmful impurity arsenic can't be effectively removed by the reduction roasting-magnetic separation process from sulfuric-acid residue. The content of arsenic would be enriched with the growth of magnetic iron grade, while the effect of the arsenic removal was obvious for sulfuric acid leaching. The leach residue, in which the content of arsenic was only 0.24% with 92.29% of arsenic leaching rate was obtained from the raw ore with 2.78% of arsenic by the sulfuric acid leaching process. And the iron grade of sulfuric-acid residue reached 61.88% while content of non-ferrous metal was very Low, which can be used as a raw material of iron-smelting. This study provided a certain amount of technical support for the similar high arsenic sulfuric-acid residue recycling.
Degradating Organophosphosphous Pesticides Wastewater by Sonophotocatalytic Oxidation Technology
Authors: Xu Xue Li , Song Wei , Zhang Li
Published: March 2013

Organophosphosphous pesticides wastewater was degradated by sonophotocatalytic oxidation technology,and some factors affecting sonophotocatalytic oxidation reaction were studied in details such as different degradation modes,the time of degradation、initial solution concentration 、initial pH value、the amount of catalyst and the effect of Fenton,etc.In the end the optimal conditons were determined.The conclusion we drawed was that the optimal time of degradation was 100min 、initial solution concentration was 100mg／L、initial pH value was 7、the amount of catalyst was 0.6g,moreover the adding of Fenton could greatly enhance the degradation rate.
Influence of Reaction Temperature on Nitrate Removal from Water by SSI
Authors: Cai Xing Fu , Shi Yan , Wang Fan , Li Jun Guo
Published: March 2013

Spherical sponge iron (SSI) with high activity and intension could be could be utilized to remove nitrate from wastewater. Influence of reaction temperature on nitrate removal by SSI from wastewater was investigated. Because of erosion battery reaction of SSI in solution, pH in solution increased quickly once SSI was added in and then maintain above 10 despite of nitrate original concentration. The reaction temperature has certain influence under higher nitrate original concentration, while little influence under lower nitrate concentration. It was concluded that nitrate removal by SSI appeared to be the first-order reaction because most of the reaction order was 1. The apparent reaction rate constant of nitrate removal was change slightly with the reaction temperature. It was suggested that the limited key of nitrate reduction by SSI was the diffusion of reactant because the activity energy, which was 11.37 and 7.24kJ/mol, was lower than 30kJ/mol.
Recovery of Fine Cassiterite from Tin Tailings Slime by Froth Flotation
Authors: Lan Zhuo Yue , Zhou Yong Cheng , Tong Xiong
Published: March 2013

Tin gravity slime tailings of Datun mineral processing plant in south-eastern China contains fine and ultrafine cassiterite. Tin recovery from the slime tailings was studies in the presence of different flotation reagents. A flotation process has been used on a laboratory scale to investigate the effect of various reagents such as collectors, auxiliary collector, activators, ect., and theirs dosages in neutral flotation environment. To reach an optimum tin recovery, different dosages of the reagents were also studied. Due to cassiterite is friable and a large amount of fines and slimes were generated. Usually de-sliming is used to prevent slime coating and to increase the recovery of tin. However, analyses have shown that fine particles in the sample mostly contain tin, thus de-sliming was not suggested. By applying the process, ultrafine cassiterite can be efficiently recovered from the tailings slime by one rougher process, and the concentrate assaying 1.20% Sn with a recovery of 89.10% was obtained.
Effect Evaluation of Foam System with Dripping Injection Foaming Agent in CO2 Flooding Reservoir
Authors: Wu Wen Xiang , Chen Shu Li , Tang Jia Bin
Published: March 2013

In order to research the effects of the concentration of foaming agent and gas-liquid ratio on the steady seepage pressure of the foam, surfactants of HY-3 and HABS are used as foaming agents in this paper. And compared with the steady seepage pressure of the process of injecting CO2 individually and injecting CO2 accompany with dripping water, the results shows that these two kinds of foaming agents both can solve the problem of injecting gas breakthrough and injecting water difficultly, and the effect of HY-3 is better than that of HABS. By the evaluation experiment of the effect of the foam system which was applied in the ultra low permeability reservoirs with crack, it can be seen that these two kinds of foaming agents both can play the role of adjusting gas injection profile. The plugging ability and shunting effect of HY-3 is superior to that of HABS.
Influence of Hardness on Casing Wear Resistance in Polysulfide Water Based Drilling Fluid
Authors: Dou Yi Hua , Zhou Hai Ling , Wang Xiao Zeng , Yang Jing Wen
Published: March 2013

Worn casing often appears in deep and ultra deep well which effected by many factors in drilling process, such as casing grades, drilling fluid density and contact forces, and so on. Using polysulfide water-based drilling fluid, simulating the actual bit pressure, rotary speed and other influencing factors, the wear experiments of TP140,VM140,P110 and N80 casing which often are adopted in the oilfield are completed, and the wear efficiency and friction coefficient which are adopted to predict down hole casing wear are obtained. The experimental results show that the higher casing steel grade, the greater the hardness, the better wear performance. The experiments can help deepen the understanding of the mechanism of casing wear. Adopting the results which are obtained in research the prediction accuracy of down hole casing wear can be improved.
Simulation Study on the Spiral Flow under Two Different Intake Ways
Authors: Lv Jian Hua , Li Xue , He Xu , Chen Hong Yan
Published: March 2013

Computational fluid dynamics software were carried out to simulated the spiral flow field of using RANS(Reynolds-averaged Navier-Stokes) turbulence models.The physical model was established with the software Gambit.Under the condition that the gas velocity is 9000m3/h. The results shows that the intake way have a major impact on spiral flow field. The model with a circular intake has a stable spiral flow field, a smaller negative pressure area and less number of secondary vortexes then model with a square intake. The center of spiral flow field is coincident with the geometric center of the cylinder.
Analysis of Geological Factors Affecting Coal Seam Gas Content and Prediction
Authors: Dai Lin Chao , Wen Guang Cai , Liu Zhen , Yang Hui Ming , Wang Bo
Published: March 2013

In order to determine coal seam gas content accurately, the single factor method was adopted to study geological factors that affect coal seam gas content of a coal mine. Bedrock depth, 50m influence coefficient and coal thickness are identified as the main controlling factors of gas content. And the corresponding correlation coefficient are: 0.6011, 0.3899, 0.2527. Factors such as effective trapping thickness, moisture content and ash content are regarded as secondary factors. Then the SVM theory was used to set up a nonlinear prediction model between coal seam gas content and main controlling factors, and the gas content was predicted. Results show that single factor method can be used to determine main controlling factors of coal seam gas and the gas content SVM model can predict gas content accurately. Besides, the research findings can provide technical basis for gas drainage and gas outburst prevention.
Landslide Stability Analysis Based on GeoStudio
Authors: Wang Rui , Wang Xi , Yin Kun , Zhao Yang
Published: March 2013

In order to monitor landslide risk, GeoStudio software is frequently applied to landslide stability analysis. In this paper, Juting landslide in Shanxi was subjected by GeoStudio software, while limit equilibrium method was adopted to calculate the landslide stability in the slip surface. The solutions of stress and displacement vector were gotten through SIGMA / W module on the landslide for finite element method in sliding surface stress analysis. And it was also used to import the results obtained in SIGMA / W module into SLOPE / W module to calculate safety factor and the potential sliding surface. The result shows that the calculated safety factors which are worked out by those two ways are close to each other, and limit equilibrium method can be used in landslide stability analysis, but the finite element method is more consistent with the actual situation. GeoStudio software can calculate landslide stability coefficient conveniently, and can express potential slip surface intuitively, providing reliable foundation for landslide stability analysis.
Land Subsidence Prediction Method of Power Cables Pipe Jacking Based on the Peck Theory
Authors: Zhang Yuan Liang , Zhang Yi Hu
Published: March 2013

Overhead transmission line and cable are generally used for across or crossing the railway, highways and rivers.For higher deformation requirement of operation of the railway and highway foundation settlement,to ensure that the cable through the process of foundation in regulating the allowable range, calculation and prediction of foundation settlement is specially necessary.Based on the Peck theory, the dominant factor in foundation settlement-strata loss calculation method is introduced supplemented with measured settlement observation records in this paper,which confirmes that the calculation results are replicab in engineering practice.
A Simulative Study on the Effects of Additional Inertia Force Exerting on the Water Dynamic Features of Damaged Vessels
Authors: Li Ang , Pu Jin Yun
Published: March 2013

With the aid of “gambit” and Reynolds Stress Transport Equations, the residential cabin model and the turbulence model were established. By observing the effects of additional inertia force exerting on the water dynamic features of damaged vessels under different linear accelerations, the following conclusions could be obtained: (1) the inflow direction through square and round breaks is deviated from the heave, and contrary to the sailing direction; while that derivation of triangle breaks is comparatively smaller, less effected by inertia force (2) within high turbulence intensity areas, square breaks mainly appear in pre-inflow areas, and triangle and round breaks mainly occur in post-inflow areas (3) with the increase of acceleration, the flow coefficient of the three kind of break tends to decline, whereas that trend seems to be less noticeable with triangle breaks (4) under the effect of inertia force, the shrink coefficient of the three types of break incline to drop; the round breaks is less effected while a distinct variance could be observed in the cases of square and triangle shaped breaks.