刚果(金)某难选氧化铜钴矿选矿工艺研究

Study on Separating Technology of a Congo(Kinshasa) Refractory Copper-cobalt Oxide Ore

针对刚果(金)某难选氧化铜钴矿高氧化率、高结合率、泥化严重、有害杂质钙镁含量高的特点,制定了不经脱泥,先浮选硫化铜钴矿、后硫化浮选氧化铜钴矿的原则流程,对易给氧化铜钴矿闭路选别带来中矿累积的微细粒中矿制定了选冶联合处理工艺。对含铜3.10%的原矿,采用最终闭路试验流程处理,获得了铜品位31.52%、回收率33.25%的硫化矿精矿和铜品位23.76%、回收率47.14%的氧化矿精矿,稀硫酸浸出中矿,可以回收6.64%的铜,总铜回收率达到87.03%,同时回收53.96%的伴生金属钴。

Aiming at such characteristics of the Congo（Kinshasa） refractory copper-cobalt oxide ore as high oxygenation,high binding rate,serious sliming and high content of deleterious impurity（Ca,Mg）,a flowsheet in principle was formulated,i.e.preferential flotation of copper-cobalt sulfide and subsequent flotation of copper-cobalt oxide without desliming,and a dressing-metallurgy combination process was drawn up to deal with the micro-fine middlings accumulating easily in the closed beneficiation of copper-cobalt oxide.Raw ore（Cu 3.10%） was finally treated by closed test process.Then sulfide concentrator with Cu grade 31.52% and recovery 33.25% and oxide concentrator with Cu grade 23.76% and recovery 47.14% were achieved.By leaching metallurgy middlings in dilute sulfuric acid,6.64% Cu could by recovered and total recovery reached 87.03%.Meanwhile,53.96% associated metal Co was recovered.