China Shenhua Energy Company is the largest coal mining state-owned enterprise in Mainland China, and the largest coal mining enterprise in the world. It is a subsidiary of Shenhua Group. It is engaged in the production and sale of coal and the generation and sale of electric power in the PRC. It operates coal mines as well as an integrated railway network and a seaport that are primarily used to transport its coal. It also operates power plants in the PRC which are engaged in the generation and sales of coal-based power to provincial and regional electric companies. Wikipedia.
Chen B.,Inner Mongolia University of Science and Technology |
Zhang D.,China Shenhua Energy Company
Applied Mechanics and Materials
In this paper, the slipping of belt conveyor for the normal stable operation and full load starting in between belt and rollers are investigated. The results illustrate that the resistance of the belt conveyor in the normal and stable operation is less than that of the full load starting operation due. The possibility of slipping in normal and stable operation is less than that of the slipping start running at full load condition. Therefore, in order to check the conveyor belt slipping, we should pay attention to the full load start condition, can not check under normal and stable operation of the skid. The application of soft-start technology to solve the problem of slipping when starting was also proposed. © (2012) Trans Tech Publications, Switzerland. Source
Zhao Y.-Y.,Jiangsu University of Science and Technology |
Li J.-Y.,Jiangsu University of Science and Technology |
Li X.-X.,China Shenhua Energy Company
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
The temperatures in welding workpieces and stirring tools were measured, and the effect of material on the temperature fields of friction stir welding was investigated. The results indicate that the temperature distributions in welding workpieces and stirring tools have the same trends for different tool materials, the temperature and its gradient reduce gradually with the temperature measurement points far away from the weld center in the workpieces and from the shoulders in the stirring tools. The peak temperature in the workpieces rises gradually along with the welding direction, and the temperature at the advancing side is higher than that in the retreated side. The temperature fluctuation in stirring tools are very small at the stable welding stage because of equilibrium between the heat quantity produced by friction between stirring tool and workpiece and that dissipated through the stirring tool. The temperature in the workpieces and stirring tools is higher while a stirring tool made of material with smaller specific heat capacity and larger thermal conductivity is used as it produce more heat to friction pairs, but lead to more heat dissipation through it. Source
China Shenhua Energy Company | Date: 2013-04-27
An opencast coal mine underground water reservoir comprising an impermeable layer and, provided below the impermeable layer, a water storage space and a purification layer. The water storage space comprises a first water storage space and a second water storage space. The purification layer comprises a first purification layer and a second purification layer. The first purification layer is provided horizontally in the water storage space and divides the water storage space into the first water storage space and the second water storage space. The first water storage space is provided below the impermeable layer and between same and the first purification layer. The second water storage space is provided below the first water storage space and the bottom of the second water storage space is provided at the bottom of the opencast coal mine underground water reservoir. The second purification layer is provided vertically within the second water storage space. The present invention, by constructing the opencast coal mine underground water reservoir, prevents wastage of water resource produced during a coal mining process, and by providing the purification layer in the opencast coal mining underground water reservoir, implements repeated purification of water, prevents environmental pollution, and implements a water conservation mining policy during the coal mining process.
China Shenhua Energy Company | Date: 2011-04-27
Provided a method for preparing metallurgical-grade alumina by using fluidized-bed fly ash, comprising: a) removing iron by wet magnetic separation after crushing the fly ash; b) reacting the fly ash after magnetic separation with hydrochloric acid to obtain a hydrochloric leachate; c) passing the hydrochloric leachate through macro-porous cationic resin to deeply remove iron to obtain a refined aluminum chloride solution; d) concentrating and crystallizing the refined aluminum chloride solution to obtain an aluminum chloride crystal; and e) calcining the aluminum chloride crystal to obtain the metallurgical-grade alumina. The method is simple, the procedure is easy to be controlled, the extraction efficiency of alumina is high, the production coast is low, and the product quality is steady.
China Shenhua Energy Company | Date: 2011-04-27
Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloride acid to obtain hydrochloric acid leachate; adsorbing gallium contained in the hydrochloric acid leachate with macro-porous cationic resin, followed by eluting to obtain an eluent containing gallium; adding masking agent to mask ferric ion to obtain an eluent containing gallium after masking; adsorbing gallium in the eluent containing gallium after masking with macro-porous cationic resin, followed by eluting to obtain a secondary eluent; adding sodium hydroxide solution into the secondary eluent to react; filtering and removing precipitates after reaction, and then concentrating the filtrate and electrolyzing to obtain metal gallium. The method simplifies the process and improves extraction efficiency of gallium.