###### Abstract  
Coking with low moisture coal is an important link of energy conservation and coke quality improvement in the coking industry. Aiming at the problems of dust emission and bad accumulation in the coking chamber during coal charging, a new system of coking coal charged into 6 m top-charge coke oven was studied and designed, in which a cylinder with telescopic and high temperature resistance was used to fill the coking chamber with a dense phase continuous flow. The coal transport characteristics, dust emission, and accumulation characteristics were studied through the actual operation of the equipment. The results found that the matching of spiral feeding speed and cylinder lifting speed had an important influence on the transport characteristics, when moisture was 5%, and the control dense phase transport conditions were--cylinder lifting speed of 0.02 m/s and spiral feeding speed control range of [0.31 m/s, 0.50 m/s]. The new device was found to reduce dust emission by 90% per square meter, compared to the traditional. The influence of controllable factors on the accumulation characteristics of coal was studied, and the essential conditions for optimal repose angle and bulk density were obtained through an orthogonal test, the prediction model of accumulation characteristics was established. c 2020 2020 2020 2020 2020 2020 2020  
the coking chamber. Through further studies, scientists developed the separation of fine particles from raw coal during coal drying [12; 13; 14; 15], the equivalent diameter of fine particles was increased by granulation after dust removal, then mixed with coarse particles and charged into the furnace. The process controls the increase of dust in the waste gas and tar, while keeping the low moisture content of the coking coal in the furnace, but at the same time, it also leads to high energy consumption in the dust removal process and frequent replacement of the dust removal bag [16]. Segregation is easy to occur during coal charging, after mixing fine granule and coarse granule [17; 18; 19; 20]. Focusing on the problem, we start with the coking coal charging method and proposed a new coal charging method in the top-charged coke oven, the equipment mainly consists of spiral feeding and high temperature resistant telescopic feeding device, this method was mainly inspired by the method of feeding flour bags with cylindrical filling pipe [21]. In theory, the technology of this device mainly controls the amount of dust brought by reducing the falling height of the coal particles with low-moisture and limiting the escape of particles under the action of the cylinder wall during the coking chamber [22; 23]. In addition, the repose angle and bulk density of coal in the coking chamber were optimized by the method of adjusting the lifting speed of the cylinder and increasing the guide plate at the blanking outlet. Through the above research and analysis, the main contributions of this paper are as follows:  
1. Choose suitable high-temperature resistant materials. 2. Design an experimental study of a new coal charging device based on the 6 m industrial top-charged coke oven. Then, run the device in the cold mode and no coal charging conditions; observe and research the feasibility of the device in terms of mechanical properties. 3. During coal charging with the new equipment, the dust emission and distribution range were tested and simulated, and compared with the traditional top charging method. 4. During coal charging with the new equipment, the transportation mode of coal was analyzed to explore the laws and control conditions of different phase flow. 5. The influence of controllable factors on the accumulation characteristics of coal was studied, then necessary conditions of optimal repose angle and bulk density were determined. 6. The prediction model of accumulating characteristics during coking coal charging was established. In short, the key point was to optimize the low moisture coking coal top charging technology in the coke oven.