内蒙古大型铜钼矿铜钼分离试验研究

内蒙古某低品位铜钼混合精矿中辉钼矿和铜矿的嵌布粒度很细,在-0.043mm级别中,辉钼矿、铜矿物的含量分别为77.30%和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,在利用多次循环闭路回水、再磨细度82.5%-0.043mm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。

Investigation on Separation of Copper-molybdenum Bulk Concentrate

In flotation the copper-molybdenum bulk concentrate is difficultly separated. The reason is that the contents of molybdenite and copper distribution in the -0043mm of bulk concentrate are 77.30% and 65.77%,respectively. In the experiment, the bulk concentrate is firstly thickened and dereagented, then add sodium silicate and NaHS as depressor of the gangue and copper minerals; 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 roughing, two scavenging, four cleaning, two cleaning after scrubbing. 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%.