用化学处理法从低品位辉钼矿精矿中回收钼

Chemical processing of a low grade molybdenite concentrate to recover molybdenum

本文报导的研究成果涉及两种工艺:(1)苏打灰焙烧法;(2)石灰强化碳热还原法。将它们用于从低品位辉钼矿精矿中提取钼产品的试验已经获得成功。用上述两种工艺已分别产出MoO_3和钼金属半成品,所得半成品再分别用炭吸附—解吸法和熔盐电解精炼法进一步提纯,最终产品的纯度分别达到99．9%和99．8%。此外,这些工艺还提供了包括环境污染和废气治理等的有效解决办法。而它们在处理高品位MoS_2矿石(或精矿)的传统工艺中,正是两个尚未解决的主要问题。

The present investigation deals with two processes, namely, soda ash roasting and lime enhanced carbothermic reduction that were successfully applied to extract molybdenum from an indigenous （and low grade） molybdenite concentrate（MoS2）. These processes yielded molybdenum in the form of molybdenum trioxide （MoO3） and molybdenum metal respectively. MoO3 and molybdenum metal, so prepared, were further refined by carbon adsorption desorption and molten salt electrorefining techniques respectively. The final purity of MoO3 and molybdenum metal were 99.9% and 99.8% respectively. These processes offered effective measures to contain environmental pollution and bypass tedious off gas treatment procedures, which, otherwise, are two major problem areas in the traditional processing of high grade MoS2 ores/concentrates.