某大型铜钼矿铜钼分离试验研究

铜钼混合精矿的工艺粒度很细,在-0.043mm的级别中,辉钼矿、铜矿物的含量分别为77.30%、65.77%,造成铜钼浮选分离困难。试验首先对铜钼混合精矿进行浓密脱药,然后以水玻璃和硫氢化钠作为脉石矿物和铜矿物的抑制剂,并用氧化剂高锰酸钾进一步抑制微细颗粒次生铜矿物,在利用多次条件试验后闭路回水、再磨细度-0.043mm82.5%的条件下,经过一次粗选、二次扫选和四次精选,擦洗后再进行二次精选的闭路试验,获得了钼品位55.73%、含铜0.64%,钼回收率68.11%的钼精矿；铜品位21.36%、含钼0.1447%,铜回收率99.98%的铜精矿,实现了铜钼的有效分离。

Experimental Research on Copper-molybdenum Separation in Large-scale Copper and Molybdenum Mine

In flotation, the copper and molybdenum mixed concentrate is difficult to separate, the reason is that the contents of molybdenite and copper minerals are 77.30% and 65.77%, and the particle size of mixed concentrate is -0.043mm. In the experiment, the mixed concentrate is firstly thickened and reagents removed, secondly, add sodium silicate and NaHS as the gangue and copper minerals depressant; add oxidant potassium permanganate to depress the ultra-fine size secondary copper minerals. With the condition of fine size (82.5% passing 0.043 mesh) and the closed water circuit, the closed process of experiment is one time roughing, two times scavenging, four times cleaning, two more times cleaning after scrubbing. After several times of experiment, the effective copper and molybdenum separation is achieved. The grade of molybdenum concentrate is 55.73%Mo, 0.64%Cu with recovery of 68.11%; while the grade of copper concentrate is 21.36%Cu, 0.1447%Mo with recovery of 99.98%.