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Development of calcium coke for CaC2 production using calcium carbide slag and coking coal 被引量:7
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作者 Xu-zhong Gong Jun-qiang Zhang +5 位作者 Zhi Wang Dong Wang Jun-hao Liu Xiao-dong Jing Guo-yu Qian Chuan Wang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2021年第1期76-87,共12页
A type of calcium coke was developed for use in the oxy-thermal process of calcium carbide production.The calcium coke was prepared by the co-pyrolysis of coking coal and calcium carbide slag, which is a solid waste g... A type of calcium coke was developed for use in the oxy-thermal process of calcium carbide production.The calcium coke was prepared by the co-pyrolysis of coking coal and calcium carbide slag, which is a solid waste generated from the chlor-alkali industry.The characteristics of the calcium cokes under different conditions were analyzed experimentally and theoretically.The results show that the thermal strength of calcium coke increased with the increase in the coking coal proportion, and the waterproof property of calcium coke also increased with increased carbonation time.The calcium coke can increase the contact area of calcium and carbon in the calcium carbide production process.Furthermore, the pore structure of the calcium coke can enhance the diffusion of gas inside the furnace, thus improving the efficiency of the oxy-thermal technology. 展开更多
关键词 calcium carbide slag calcium carbide production calcium coke thermal strength waterproof property
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CO_(2) mineralization of carbide slag for the production of light calcium carbonates 被引量:5
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作者 Tongyang Zhang Guanrun Chu +6 位作者 Junlin Lyu Yongda Cao Wentao Xu Kui Ma Lei Song Hairong Yue Bin Liang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第3期86-98,共13页
The production of polyvinyl chloride by calcium carbide method is a typical chemical process with high coal consumption,leading to massive flue gas and carbide slag emissions.Currently,the carbide slag with high CaO c... The production of polyvinyl chloride by calcium carbide method is a typical chemical process with high coal consumption,leading to massive flue gas and carbide slag emissions.Currently,the carbide slag with high CaO content is usually stacked in residue field,easily draining away with the rain and corroding the soil.In this work,we coupled the treatment of flue gas and carbide slag to propose a facile CO_(2)mineralization route to prepare light calcium carbonate.And the route feasibility was comprehensively evaluated via experiments and simulation.Through experimental investigation,the Ca^(2+) leaching and mineralization reaction parameters were determined.Based on the experiment,a process was built and optimized through Aspen Plus,and the energy was integrated to obtain the overall process energy and material consumption.Finally,the net CO_(2)emission reduction rate of the entire process through the life-cycle assessment method was analyzed.Moreover,the relationship between the parameters and the CO_(2)emission life-cycle assessment was established.The final optimization results showed that the mineralization process required 1154.69 kW·h·(t CO_(2))^(-1) of energy(including heat energy of 979.32 kW·h·(t CO_(2))^(-1) and electrical energy of 175.37 kW·h·(t CO_(2))^(-1)),and the net CO_(2)emission reduction rate was 35.8%.The light CaCO_(3)product can be sold as a high value-added product.According to preliminary economic analysis,the profit of mineralizing can reach more than 2,100 CNY·(t CO_(2))^(-1). 展开更多
关键词 CO_(2)mineralization calcium carbide slag Light calcium carbonate Process simulation Life-cycle assessment
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