Energy Material, Chemical Engineering and Mining Engineering

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Authors: Ying Li Li, Zhi Wei Wang
Abstract: Biomass is an important energy material, which can be used for power generation in large scale after briquetting. In the paper, the briquetting methods such as biomass cold briquetting, thermal briquetting and common briquetting as well as biomass briquetting machines of ring die, flat die, piston and screw type were firstly presented. Combined with biomass briquetting fuel technology and biomass power generation technology, the characteristics of biomass briquetting fuel direct combustion power generation, co-firing power generation and gasification and power generation technologies were elaborated. Finally, there was an outlook for the development prospect of such energy materials and its power generation technology in China. A conclusion to their economic, environmental and social benefits were gotten, which provides a certain reference for comprehensive application of biomass resource with high efficiency.
Authors: Jun Chao Zheng, Xiao Cong He, Jing Nan Xu, Kai Zeng, Yan Fang Ding, Yue Bo Hu
Abstract: The clinch joining technique can be used to join energy saving materials based on a cost effective, environmentally friendly process. In this paper, the mechanical joining method by clinching with segmented die is analyzed utilizing a finite element method. A comparison is conducted about the principle of forming process and the metal flowing direction for two different types of die, drawing conclusions that a better interlocking length can be obtained using segmented die. Analyzing the quality parameter of the clinching results, finds the reason why the segmented die can get a better neck thickness and undercut. Meanwhile, the results of clinching with segmented die also show a good agreement with experimental results.
Authors: Bin Shao, Qing Hua Yu, Xiao Hong Li
Abstract: This thesis introduces design principle, methods and composition of a new test device for carbon dioxide absorbents as energy materials based on pressure sensor and temperature sensor. The error of the test device is analyzed. The results show that the error of the device is acceptable after correcting, the error can be ignored. The test results are reliable.
Authors: Ding Guo Zhao, Xiao Jie Cui, Shu Huan Wang, Long Chen
Abstract: The largest proportion of element in master alloys were iron and pure iron smelting industrial used accounts for 70% of the total raw materials. Iron produced by secondary refining has the highest purity. If the inclusion in the raw materials is very low, inclusions in smelting amorphous master alloy would be lower. The carbon content of 0.1% in the carbon-75 ferrosilicon, but ferrosilicon dosage is small, generally is about 10%, so the carbon content in the master alloy is below 0.01%. Boron anhydride generally containing boron oxide at about 95%, the rest is mainly water, contains less impurities, the alumina content is generally below 0.1%, as well as chloride, which have little effect on master alloy smelting. Impurities in additive calcium oxide, calcium fluoride are generally below 10%, mainly are oxides, presenting in the slag in the smelting master alloys basically.
Authors: Nan He, Zhong Fu Tan, Shu Xiang Wang, Yang Hou
Abstract: Generation permits trade plays a key role in the economic generation dispatch. The application of new energy materials has a positive influence on the generation fuel mix, which offers cleaner power option for generation permits trade. An optimization model on generation permits trade is established to promote the development of renewable energy and the lowest generation cost of a certain unit commitment. Power demand, ramp-up limit, real power of a unit, new energy materials, and a certain emission limit are applied as the constraints of the model. The process of generation permits trade is a cooperative game. An optimized profit allocation model is also established using Shapley value to effectively allocate the profits among the units participating in the generation permits trade.
Authors: San Xin Wang, Ze Yu Wu
Abstract: Bulk metallic glasses (BMGs) alloys (Fe71.2B24Y4.8)96Nb4-xZrx (x = 1-4 at.%) with a maximum diameter of 5 mm were synthesized with low purity materials by copper mold casting technique. The effect of Zr substitution for Nb on the structure, thermal stability and the magnetic properties has been studied. It was found that the substitution of an appropriate amount of Zr for Nb can improve the glass forming ability. The wide supercooled liquid region ∆Tx (exceeding 123 K) and a high Tg (exceeding 868 K) demonstrated a high thermal stability of the present Fe-based BMGs. In addition, these BMGs also exhibit good soft magnetic properties with relatively high saturation magnetization of 88 emu/g, and low coercivity of 20 Oe.
Authors: Feng Lan Han, Qi Xing Yang, Lan Er Wu, Sheng Wei Guo, Yong Jiang
Abstract: Environmental performances of fluorite used as catalyzer for chemical reaction between MgO and Si were investigated by performing pilot scale experiments of Mg production. F amounts of 0.012-0.116 kg were added in the charged briquettes and Mg slag generated from the chemical reaction in most of the tests weighted 4.26-4.96 kg with F contents ranging 0.21-2.52%. Based on high recoveries of F, 83-100%, in the slag after the reaction, it is estimated that there are little or no F compounds leaving the retorts during the pilot tests. However, high amount of F, 72.9 mg/kg, was leached out from an Mg slag sample obtained from an Mg plant, making it necessary to decrease amount of fluorite used as catalyzer for the reaction or to improve operation conditions, thus, enhancing rate for chemical reaction between MgO and Si in Pidgeon process.
Authors: Chang Lu, Yuan Qing Liang, Hui Hui Li
Abstract: In this paper air was passed through into one progress temperature-controlled box with coal sample and nitrogen into another as comparison during the procedure of coal’s low-temperature (10~80°C)oxidation . Draw the heating curves and heating rate curve, and equation model is built combined with energy conservation, then concludes the heat release rate of the coal samples in the air conditions. The experimental results show that the condition with air is more close to the storage conditions of coal such as transportation in reality, which is very significant to prevent the spontaneous combustion of coals
Authors: Ding Guo Zhao, Xiao Jie Cui, Shu Huan Wang, He Jun Zhang
Abstract: The thermodynamic analysis shown that oxygen content in master alloy is very low, so other alloy elements content which are balance to oxygen are relatively high. In the amorphous master alloy, deoxidizing capacity of silicon is stronger than boron, and with process of decrease of the temperature, oxygen content decrease. The silicon in the master alloy can also take off the oxygen content below 1 ppm. Denitrification capacity of boron is stronger than silicon, and with process of decrease of the temperature, nitrogen content decrease. The boron in the master alloy can also take off the nitrogen content below 4 ppm. All of the research are based on energy materials and it will be useful for the development for energy saving.

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