浮选机－浮选柱联合分选某硫铁矿尾矿试验研究

以广东云浮某硫铁矿选矿厂的浮选尾矿为样品，采用浮选机-浮选柱联合分选工艺进行分选，充分利用浮选机和浮选柱两种设备的特性，在保证粗颗粒回收的同时强化了微细颗粒的回收。对原矿样品的粒度和硫含量进行了分析，结果表明硫主要分布于+74 μm和-10 μm两个粒级中。通过浮选机两次粗选、两次扫选、粗精矿再磨后两次精选流程的闭路试验，可从含硫6.91%的浮选入料中获得品位为33.42%、回收率为63.82%的硫精矿。在相同的药剂用量下，通过浮选机-浮选柱联合分选，可获得品位为32.68%、回收率为70.84%的硫精矿。粒级回收率分析表明，与单一浮选机工艺相比，浮选机-浮选柱联合分选后，-54 μm细粒级的回收率明显提高，尤其是-20 μm粒级，回收率提高了将近10个百分点。

Pyrite tailings flotation based on collaboration of flotation machine and flotation column

Flotation tests were conducted by using a sample of pyrite flotation tailings from a mine concentrate plant located in Yunfu，Guangdong province of China.The results show that the coarse and fine particles were effectively recovered based on the collaboration of flotation machine and flotation column to take advantages of the two flotation devices.The analysis of size and sulfur content distribution showed that sulfur mainly existed in +74 μm and -10 μm size fractions.Using flotation machine，under a closed-circuit of two stage roughing two stage scavenging and two stage cleaning after regrinding of primary concentrate，concentrates containing sulfur of 33.42% with recovery of 63.82% were obtained when the flotation feeding sulfur was 6.91%.Under the same flotation reagents dosage，concentrates containing sulfur of 32.68% with recovery of 70.84% were obtained by collaboration of flotation machine and flotation column.Compared with flotation machine，the collaboration of flotation machine and flotation column was more efficiency.The recovery of -54 μm significantly increased.Especially for the -20 μm size fraction，the recovery increased by almost 10 percentage points.