摘要
为了有效利用云南某低品位钼铜矿资源,对该矿进行了工艺矿物学研究。主要通过化学分析、镜下观察、电子探针测试(EPMA)以及矿物解离度分析(MLA),查明了该矿的工艺矿物学参数。其主要特征为84.41%的钼赋存于辉钼矿中,13.51%富集于钼钙矿,2.08%以类质同象的形式赋存于白钨矿中;78.88%的铜富集于黄铜矿中,16.16%集中于斑铜矿中。辉钼矿粒度粗,主要集中于-3 mm+0.074 mm之间,72%-200目样品中辉钼矿单体解离度高达89.84%,且与铜硫化矿密切共生,可采用浮选工艺回收硫化钼矿物;氧化钼矿物钼钙矿与白钨矿紧密连生,天然可浮性差,磁性较弱,而脉石矿物多为弱磁性的石榴子石等矿物,可通过磁选工艺将氧化钼矿物富集。该矿性质表明采用单一选矿工艺很难获得最佳的钼回收率,需采用铜钼混合浮选-铜钼分离-磁选联合流程处理该矿石。
The process mineralogy research is carried out for one low grade lindgrenite resource in Yunnan in order to effective utilization of the resource. The process mineralogy parameters of this ore is found out mainly through chemieal analysis, microscopic observa- tion, electronic probe analysis （EPMA） and degree of mineral liberation analysis （MLA）. The major characteristic is 84. 41% molybdenum occurred in molybdenite, 13.51% molybdenum enriched in powellite, 2. 08% molybdenum occurred in scheelite in isomorphism form; 78.88% copper enriched in copper pyrites, 16. 16% copper enriched in bornite. The particle size of molybdenite is crude, the size range is major among -3ram ＋ 0. 074ram, the single separation degree of molybdenite can reach to 89. 84% in 72% -200 mesh sample, and it is close coexisted with copper sulfide, so the flotation technology can be used to recover the molybdenum sulfide mineral; in the molybdenum oxide mineral, the intergrowth is occurred between powellite and scheelite closely, the inherent floatability is bad, the magnetism is weaker, and the gangue mineral is garnet and the other minerals with low magnetic, so the magnetic separation process can be used to enrich the mo- lybdenum oxide mineral. The mineral properties show it is hard to get the optimal molybdenum recovery rate by single mineral processing technology, the joint process flow that the copper and molybdenum mixed flotation-copper and molybdenum separation-magnetic separation shall be adopted for ore treatment.
出处
《云南冶金》
2016年第4期15-20,共6页
Yunnan Metallurgy
