某含磁黄铁矿铜硫矿的磁选试验研究

Magnetic separation research on copper sulfur ore containing high-content of pyrrhotine

广东某铜硫矿的磁黄铁矿含量高,部分磁黄铁矿的可浮性与黄铜矿、黄铁矿相近.针对该铜硫矿的矿石性质,采用"一次粗选-再磨-一次精选"磁选工艺,在磨矿细度70.12%-0.074mm、再磨细度90.20%-0.074mm的条件下,对品位为0.59%Cu、20.95%S、30.78%Fe的原矿,获得产率15.12%的磁硫精矿,其品位为S 35.76%、Fe 55.30%,S,Fe回收率分别为25.82%,27.16%,Cu损失率为2.16%.采用该工艺不仅脱除了对铜硫浮选影响较大的部分磁黄铁矿,而且可获得合格的磁硫精矿产品,为后续铜硫浮选创造有利的条件.

A copper sulfur ore in Guangdong contains a large amount of sulfide minerals such as pyrrhotine. According to complicate variable flotability of pyrrhotine, part of pyrrhotine has similar flotability with chalcopyrite and pyrite. Based on the ore property of raw ore, the magnetic process which contains one roughing-regrinding-one cleaning, was chosen to remove pyrrhotine in raw ore. With grinding fineness of 70.12%-0. 074mm and regrinding fineness of 90.20%-0. 074mm, when the raw ore assays 0.59%Cu,20.95%S and 30.78%Fe,a pyrrhotine concentrate with the yield of 15.12% and the grade of 35.76%S and 55.30%Fe was obtained,the S and Fe recovery is 25.82% ,27.16% ,respectively,and the Cu loss rate is 2.16%. The process not only removes part of the pyrrhotite which has a great influence on the flotation of copper and sulfur, but also obtains the qualified magnetic sulfur concentrate product, thereby creating favorable conditions for the subsequent flotation of copper and sulfur.