A new non-electrolytic aluminum extraction method  

一种新的非电解法炼铝工艺（英文）

作　　者：Oleg G.PARFENOV Andrey D.KUSTOV Leonid A.SOLOVYOV 

机构地区：[1]Institute of Chemistry and Chemical Technology of SB RAS

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第9期2509-2517,共9页中国有色金属学报（英文版）

基　　金：supported by the Russian Academy of Science under project No. V.46.1.4 "High speed metallurgy"

摘　　要：A new method of primary aluminum extraction from alumina was proposed. The method is based on the new reaction AlI3＋（3/2）Zn=Al＋（3/2）ZnI2. In its turn, the exchange reaction AlCl3＋CaI2→AlI3＋CaCl2 is used to get aluminum iodide from aluminum chloride—the product of alumina carbochlorination. These reactions were studied in laboratory experiments as well as additional reactions, which were needed for the main chemicals recycling： Cl2, ZnI2→Zn, CaCl2→CaI2. XRD and SEM methods were used to investigate the phases and morphology of the reaction＇s solid products. The global free energy minimization method was used for the chemical equation＇s calculations. It was shown that aluminum can be effectively extracted from alumina without electrolysis, extreme high temperature and expended chemicals. The estimated specific carbon consumption and CO2 atmospheric pollution rate have to be halves of such values for the contemporary aluminum plant powered by the coal power station.提出了一种从氧化铝中提取原铝的新方法。该方法的原理基于如下化学反应:AlI_3+(3/2)Zn=Al+(3/2)ZnI_2。首先通过氧化铝的碳热氯化反应得到氯化铝(AlCl_3),然后通过氯化铝和碘化钙的交换反应(AlCl_3+CaI_2→AlI_3+CaCl_2)得到碘化铝。在实验室条件下对这些反应进行了研究,同时对一些回收主要化学试剂的反应进行了研究(Cl_2,ZnI_2→Zn,CaCl_2→CaI_2)。采用XRD和SEM对反应产物的相组成及形貌进行分析。采用总自由能最小方法对化学反应平衡进行计算。结果表明,采用非电解方法,可以在没有非常高的温度和可消耗的化学试剂的条件下,从氧化铝中有效地提取铝。与当今采用燃煤发电提供电力的铝电解厂相比,本方法所产生的单位碳消耗和CO_2大气排放可以降低一半以上。

关 键 词：aluminum aluminum alloy chlorides IODIDES ZINC IODINE high-speed metallurgy 

分 类 号：TF821[冶金工程—有色金属冶金]