多金属氧化钼矿工艺矿物学及其综合利用技术研究

Mineralogical characteristics and comprehensive utilization of polymetallic oxidized molybdenum ore

对氧化钼矿的工艺矿物学特征及其综合利用技术进行研究.结果表明:氧化钼矿的主要矿物组成为钼华、钼钙矿、褐铁矿、黄铁矿及石英.在磨矿细度为200目以下含量65%时,采用混合浮选工艺,可得钼品位为7.41%的钼精矿,钼回收率为82.18%,其中含铅18.02%、含金7.96 g.t-1、含银1 002 g.t-1;采用联合碱浸法处理钼精矿,可获得钼浸出率为95.61%的工艺指标;采用氰化法处理碱浸渣,金银浸出率分别为94.55%、83.96%;采用浮选法处理氰化渣,可得铅品位为46.76%的铅精矿,铅回收率为52.83%;采用重选法回收浮选尾矿中的石英,可获得SiO2含量为97.12%、回收率为80.84%的石英产品.

The mineralogical characteristics and comprehensive utilization technology of the oxidation molybdenum ore were studied. The results show that the main minerals of oxidation molybdenum in- clude molybdite, powellite, limonite, pyrite and quartz. The molybdenum grade of concentrate is 7.41% and the recovery of molybdenum is 82. 18%, with the grade of lead, gold and silver is 18.02%, 7.96 g· t^-1 and 1 002 g· t^-1 respectively when mixed flotation process is adopted under the conditions of grinding fineness of 200 mesh content 65%. The molybdenum leaching rate can be ob- tained for 95.61% when alkali leaching is adapted to processing molybdenum concentrate and the leaching rate of gold and silver is up to 94.55% and 83.96% by using cyanide leaching of alkali leac- hing slag. The lead grade of concentrate is 50.23% and the recovery of lead is 50.39% using flotation process to deal with cyanide leaching slag. The SiO2 content of concentrate is 97.12% and the recov- ery of Si02 is 80.84%, under the gravity separation to deal with flotation tailings quartz.