Chlorination methods applied to recover refractory metals from tin slags
Chlorination methods applied to recover refractory metals from tin slags
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DOI：
10.1016/j.mineng.2007.08.011
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发表时间：
2008-01-01
影响因子：
4.8
通讯作者：
Moura, Francisco J.
中科院分区：
文献类型：
--
作者：
Brocchi, Eduardo A.;Moura, Francisco J.
锡石是锡的主要矿石，含有大量的铌和钽，它们被排除在锡冶炼炉渣中。因此，锡渣应被视为铌和钽的重要来源，特别是当这两种金属的主要矿石储量非常有限时。由于这两种金属的需求量越来越大，而且价值很高，因此有必要开发一种合适的工艺从锡冶炼渣中回收铌和钽。In.鉴于氯化物冶金的某些优点，作者进行了在较低的温度和分压下，用气态氯在碳存在下氯化锡渣、盐酸浸出和四氯化碳蒸气氯化以回收金属有价物，特别是铌和钽的研究。本文根据这些氯化过程的热力学和动力学，对铌、钽及一些伴生金属的回收作了简要的叙述和讨论。根据氯化研究的结果，提出了从锡渣中回收铌和钽的进一步研究建议。(c)2007爱思唯尔有限公司保留所有权利。
Cassiterite, the principal ore of tin, contains a considerable amount of niobium and tantalum, which are rejected in the tin smelter slag. Therefore, the tin slag should be considered as an important source of niobium and tantalum, particularly when the reserves of the principal ores of these two metals, are very limited in nature. Because of the increasing demand and very high value of these two metals, it has been necessary to develop a suitable process to recover niobium and tantalum from tin smelting slag. In. view of certain advantages of chloride metallurgy, the authors have carried out some studies on chlorination of tin slag by gaseous chlorine in presence of carbon, hydrochloric acid leaching and chlorination by carbon tetrachloride vapor, at a comparatively low temperature and partial pressure, to recover the metal values, particularly niobium and tantalum. In this paper, based on thermodynamics and kinetics of these chlorination processes, the recovery of Nb and Ta and some associated metals has been briefly described and discussed. Based on the findings of the chlorination studies made, some further investigations for recovering niobium and tantalum from tin slags have been suggested. (c) 2007 Elsevier Ltd. All rights reserved.