Thermodynamics analysis of carbothermal-chlorination reduction in aluminum production

作者: Weijuan Yang , Xiaowei Liu , Jianzhong Liu , Zhihua Wang , Junhu Zhou

DOI: 10.1016/J.APPLTHERMALENG.2016.09.156

关键词:

摘要: Abstract Carbo-thermal reduction aluminum is regarded as the future production method for its low energy consumption. A thermodynamics analysis performed, taking Al–C two-step model objective. High temperature beneficial to reaction efficiency, but harmful exergy efficiency of first (Al2O3 + 3C + AlCl3 = 3AlCl + 3CO, R1). The second (3AlCl = AlCl3 + 2Al, R2) presents an opposite pattern. An optimal window exists AlCl mediated carbon method. R1 above 1520 K and that R2 398–798 K in window. Heat recovery significantly important enhancing both and consumption actual processes. Energy reduced from 11,335 kW h/t(Al) 8063 kW h/t(Al) when ideal heat performed. Compared with electrolytic aluminum, carbothermol-chlorination a better performance some condition. 10,151 and 13,200 kW h/t(Al) respectively. Moreover, 67% greater by 1.7 times than that aluminum.

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