A new non-electrolytic aluminum extraction method

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• 作者：Oleg G. PARFENOV ; Andrey D. KUSTOV ; ^{kustov@icct.ru" class="auth_mail" title="E-mail the corresponding author} ; Leonid A. SOLOVYOV
• 关键词：aluminum ; aluminum alloy ; chlorides ; iodides ; zinc ; iodine ; high-speed metallurgy
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：26
• 期：9
• 页码：2509-2517
• 全文大小：2349 K

文摘

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.