某石英脉钨多金属矿石工艺矿物学研究

摘要

This paper studies the process mineralogy of a tungsten poly-metallic ore by automatic quantitative mineral technology MLA combined with traditional methods. WO3 grade of the ore is 1.25%, tungsten mainly exists as scheelite and wolframite with theoretical recovery rate attaining 99%;copper chiefly exists as chalcopyrite with theoretical recovery rate reaching 96 %; these silver minerals have many types but low content,closely associated with lead-bismuth minerals such as galena and native bismuth. The theoretica recovery rate can attain 61% if recovering silver from copper concentrate. The results indicate that the tungsten minerals in the ore mainly output as large veins,but a few of them as fine grain-disseminated structure.The spatial distribution and dissemination size of tungsten minerals are extremely uneven.The grain size of scheelite (containing wolframite) and chalcopyrite are relatively coarse and the grain size of more than 0.04 mm accounted for about 95%and 73%respectively, which is very beneficial for grinding dissociation.%采用MLA矿物自动定量检测系统，结合传统的工艺矿物学研究方法，对某钨多金属矿石进行工艺矿物学研究。原矿石含WO31.25%，钨主要以白钨矿和黑钨矿矿物形式存在，理论最高回收率约为99%；铜主要以黄铜矿矿物形式存在，理论最高回收率约为96%；银矿物种类多、含量低，与方铅矿、自然铋等铅铋矿物紧密共生，可从含铅铋矿物的铜精矿中回收银，理论最高回收率约为61%。研究数据表明矿石中的钨矿物主要呈大脉状产出，少数呈细粒浸染状产出，在空间分布和嵌布粒度上极不均匀。白钨矿（含黑钨矿）和黄铜矿的粒度较粗，大于0.04 mm粒级者分别占约95%和73%，对磨矿解离非常有利。