某难选泥质氧化铜矿浮选试验研究

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。

Study on Flotation Experiment of a Refractory Argillaceous Copper Oxide Ore

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.