某难选泥质氧化铜矿浮选试验研究

Study on Flotation Experiment of a Refractory Argillaceous Copper Oxide Ore

为减少泥质矿物对孔雀石浮选的影响,采用预先脱泥浮选工艺,对某高氧化率、含泥量大的难处理氧化铜矿石进行试验研究,对于预先脱泥浮选工艺,细泥脱除率为9.42%的情况下,能获得综合铜精矿品位为27.16%,脱除的细泥作为产品转入湿法浸出作业,铜的浸出率能达到94.30%,折算成全流程的铜的回收率为12.02%,所以全流程的铜综合回收率为85.46%,与原矿直接浮选工艺对比,浮选综合铜精矿品位提高了3.88%,铜综合回收率提高了6.32%,充分说明了预先脱泥浮选-矿泥浸出的选冶联合工艺的效果。而且原矿经过旋流器预先脱泥处理后,在保证铜精矿回收率的同时,包括氟硅酸钠、硫化钠和捕收剂在用量上都有较大的降低空间,充分说明了预先脱泥浮选工艺的效果。

In order to reduce the influence of clay minerals on malachite flotation,a series of flotation experiments were carried out on the basis of pre-desilting process,aiming at such characteristics of this refractory argillaceous copper oxide ore as high oxidation rate,serious sliming.When the fine mud removal rate was 9.42%,the comprehensive concentrator with Cu grade 27.16%,the leaching rate of copper can reach 94.30%,and the copper recovery rate of the whole process is 12.02%,so the comprehensive copper recovery rate of the whole process is 85.46%.Compared with the direct flotation process of the ore,the flotation comprehensive copper concentrate grade has increased by 3.88%,the comprehensive recovery rate of copper increased by 6.32%,fully demonstrating the effect of the pre-dewatering flotation-mineral leaching process.The amount of sodium fluosilicate,sodium sulfide and collector could be reduced greatly on the premise of ensuring the recovery rate of concentrate,which fully explained the effect of pre-desilting flotation process.