富钴结壳选冶方案配置与试验

针对富钴结壳开采过程中不可避免会产生夹带部分基岩的问题，采用选冶联合工艺处理富钴结壳，考察了不同选矿（浮选、强磁选、重磁选）—二氧化硫还原酸浸联合工艺对技术经济指标的影响，并对不同采矿贫化率（10%、20%、30%）条件下的选冶指标进行了分析。结果表明，富钴结壳采用选冶联合工艺才能经济处理，三种选冶方案配置中，强磁选矿—冶炼配置相对较好，浮选—冶炼配置方案次之，重磁选矿—冶炼配置方案较差，具体选矿工艺可根据实际情况选择。原矿相较于精矿，在二氧化硫平均用量增加9.4%，硫酸平均用量增加6.7%的条件下，镍钴锰浸出率基本持平，达到90%以上，精矿的二氧化硫和硫酸消耗更少，更具成本有优势。

Configuration Scheme and Experimental Research of Beneficiation and Metallurgy for Cobalt-rich Crusts

To address inevitable entrainment of base rock during mining process of cobalt-rich crusts, a combined process of beneficiation and metallurgy was used to deal with cobalt-rich crusts. The processes of different beneficiation (flotation, strong magnetic separation, gravity magnetic separation) combined with sulfur dioxide reduction acid leaching were studied, and the technical and economic indicators under different mining dilution rates (10%, 20%, 30%) were analyzed. The results show that cobalt-rich crusts must be processed economically by a combined process of beneficiation and metallurgy. Among the three schemes, strong magnetic separation-metallurgy configuration is relatively better, followed by flotation-metallurgy configuration, and heavy magnetic beneficiation-metallurgy configuration rank at the bottom, and the specific beneficiation process can be selected according to actual situation. Compared with concentrate obtained after beneficiation and raw ore of different mining dilution rates, only when the amount of sulfur dioxide is raised by 9.4% and amount of sulfuric acid is raised by 6.7%, leaching rate of nickel, cobalt and manganese can be basically the same of 90% above. Concentrates consume less sulfur dioxide and sulfuric acid, which is more cost-effective.