某富含蛇纹石的低品位难选铜镍矿选矿工艺研究

针对某铜镍矿铜镍品位低,铜镍矿物嵌布粒度微细,共生关系复杂,蛇纹石含量高等特征,开展了选矿工艺试验研究。试验结果表明,采用预先脱除脉石-铜镍混合浮选流程,通过对含Ni 0.51%、含Cu 0.20%、含Co 0.02%的原矿进行选择性磨矿,利用MIBC预先脱除部分易浮脉石,碳酸钠作矿浆pH调整剂,CMC作MgO脉石的抑制剂,硫酸铜和丁基黄药分别作铜镍矿物的活化剂和捕收剂,全流程浮选闭路试验获得了含Ni 7.78%、Cu 2.91%、Co 0.24%,回收率分别为Ni 72.98%、Cu 66.57%、Co 51.29%的铜镍混合精矿。该工艺流程获得了较好的选别效果,实现了铜、镍、钴的有效回收。

Beneficiation Experiment on a Low-Grade Refractory Copper-Nickel Ore Rich in Serpentine

According to the characteristics of a low-grade copper-nickel ore with complex associated relations, fine disseminated size of copper and nickel and high content of serpentine, beneficiation experiments on the ROM to recover Cu, Ni and Co were conducted. The results showed that good separation indexes had been achieved by the flotation process of pre-removal of gangue- Cu/Ni bulk flotation , for the ROM assaying Ni 0.51%, Cu 0.20%, and Co 0.02%, bulk concentrate assaying Ni 7.78%, Cu 2.91%, Co 0.24%,at the recovery of Ni 72.98%, Cu 66.57%, Co 51.29% were obtained by flotation locked cycle test under the condition of selective grinding, sodium carbonate as pH regulator of ore pulp, CMC as inhibitor of MgO bearing gangue, copper sulphate as activator and butyl xanthate as collector of recoverable metal minerals. The recovery of copper, nickel and cobalt had been realized effetely by flotation process.