旋流器脱泥优化某高泥氧化铜矿石的回收效果研究

Study on the Recovery Effect of High Slime Copper Oxide Ores Using Cyclone Desliming

某高泥氧化铜矿石铜品位为4.26%,主要铜矿物为孔雀石,其次是辉铜矿、硅孔雀石和斜硅铜矿,脉石矿物主要为泥质粉砂岩、石英粉砂、绢云母、绿泥石等。针对氧化铜矿石浮选中矿泥会恶化浮选过程,大量消耗浮选药剂,影响浮选指标的问题,对磨矿细度为-0.074 mm占64.04%的矿石(-0.010 mm占14.05%)优先选出硫化铜矿物后的产品进行了直接硫化浮选和旋流器机械脱泥后的浮选试验。结果表明,用旋流器脱出的产率为12.64%、铜品位为4.82%的细泥采用浸出工艺处理,铜浸出率达95.26%;产率为87.36%、铜品位为3.32%的沉砂采用硫化浮选流程处理,可获得铜品位为24.75%、铜回收率为67.47%的铜精矿,铜综合回收率为84.01%;而直接硫化浮选仅获得铜品位为19.79%、铜回收率为75.09%的铜精矿,尾矿铜品位高达1.02%。与高泥氧化铜矿石的直接浮选相比,脱泥浮选工艺更加平稳、可控,铜回收指标更理想,浮选药剂用量更低,是一种较有发展前景的工艺形式。

The copper grade of high slime copper oxide ores is 4.26%,and the main copper minerals are malachite,followed by chalcocite,chrysocolla and shattuckite.The gangue minerals are mainly argillaceous siltstone,quartz silt,sericite and chlorite and so on.In view of the problem that the slime of copper oxide ores in the flotation process deteriorates the flotation,consumes a large amount of flotation agents and affects the flotation index,the flotation tests of direct sulphidizing flotation and mechanical desliming using cyclone were carried out for the ores with grinding fineness of-0.074 mm accounting for64.04%(-0.010 mm accounting for 14.05%),and the copper sulfide ores were selected firstly.The results showed that the copper leaching rate of the fine slime(yield of 12.64%and the copper grade of 4.82%treated by cyclone)is 95.26%after leaching process.The copper grade,copper recovery rate and copper comprehensive recovery rate of the underflow(yield of87.36%and the copper grade of 3.32%treated by cyclone)is 24.75%,67.47%and 84.01%respectively,after two roughing flotation.The copper concentrate with copper grade of 19.79%and recovery rate of 75.09%were obtained by directly sulphidizing flotation,and the copper grade of tailing reached up to 1.02%.Compared with the direct flotation of high slime copper oxide ores,the desliming flotation process is more stable and controllable,and can get ideal copper recovery index and lower dosage of flotation agents,which is a prospecting process.