铜钴伴生硫化矿火法冶炼过程钴的分配计算

Distribution Calculation of Cobalt in Pyrometallurgy Process of Copper and Cobalt Associated Sulphide Ore

针对铜钴伴生硫化矿冶炼的难题,提出了氧化造锍熔炼—还原造锍熔炼—氧化吹炼的工艺流程,以提高钴回收率、缩短钴回收流程。对氧化造锍熔炼—还原造锍熔炼过程中钴的分配比进行了计算。结果表明,在氧化造锍阶段,低操作温度和低冰铜品位可大幅提高钴在锍和渣中的分配比;在还原造锍阶段,低的还原温度和造高含铁冰铜都有利于钴的富集和回收。在典型的闪速熔炼—还原贫化工艺过程中钴的最大回收率为65%,可通过改变操作工艺条件来提高钴回收率。

A new technological process, including oxidation matte smelting, reducing matte smelting and oxidation blowing, was proposed to solve the problem in traditional pyrometallurgy of copper and cobalt associated sulfide ore, improve cobalt recovery rate, and shorten cobalt recovery process. The distribution ratios of cobalt in oxidation matte smelting and reducing matte smelting process were calculated. The re- sults show that in oxidation stage, low operating temperature and low matte grade can improve cobalt dis- tribution ratio between matte and slag significantly, while low operating temperature and high iron bearing cobalt matte is in favor of cobalt recovery in reducing matte smelting stage. The maximum cobalt recovery, though 65 % in a typical flash smelting and reduction dilution process, can be improved by a change of op- erating parameters.