刚果(金)某氧化铜钴矿工艺矿物学特性及对浸出工艺的影响

为合理开发利用刚果(金)某氧化铜钴矿提供理论依据,利用先进仪器—矿物参数自动定量分析系统(AMICS)、扫描电子显微镜等综合手段对该矿进行了工艺矿物学研究,指出影响铜钴浸出的矿物学因素。结果表明,铜的氧化率为92.22%,氧化铜矿物主要为孔雀石和蓝磷铜矿;钴的氧化率为85.84%,氧化钴矿物主要为水钴矿。矿石中铜钴矿物粒度分布不均,其中,铜矿物以中粗粒为主,钴矿物以中细粒为主,并且黏土矿物较多,铜钴矿物在粗磨条件下易与脉石裸露连生,因此建议在适当粗磨条件下采用酸法搅拌浸出工艺回收铜钴。矿石中分别有3.69%的铜和9.46%的钴以吸附态分布在褐铁矿和铁锰水合氧化物中,这部分铜、钴较难浸出,是影响浸出率提高的主要因素。

Process Mineralogy and Its Influence on Metallurgy Technology of a Copper-cobalt Oxidized Ore in Congo (DRC)

Process mineralogy of copper-cobalt oxidized ore in Congo has been studied by multiple methods such as advanced instrμment—AMICS (Advanced Mineral Identification and Characterization System) and scanning electron microscope, which points out the mineralogical factors affecting the acid leaching of copper and cobalt. The results show that the oxidation ratio of copper is 92.22%, mainly in malachite and cornetite; the oxidation ratio of cobalt is 85.84%, mainly in heterogenite. The size distribution of copper and cobalt minerals in the ore is uneven, among which copper minerals are mainly mediμm-coarse, cobalt minerals are mainly mediμm-fine, and there are many clay minerals. The copper and cobalt minerals are easy to be exposed under the condition of coarse grinding, it is suggested that acid agitation leaching should be adopted for copper and cobalt recovery under proper coarse grinding conditions. 3.69% copper and 9.46% cobalt are distributed in limonite and Fe-Mn hydrated oxide in the adsorption state, and this part of copper and cobalt is difficult to leach, which mainly affects the improvement of leaching rate.