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采用Mextral 984H萃取Cu-新型萃取剂HBL110萃取Co的工艺,从含Fe等杂质的铜钴矿堆浸液中回收Co,考察了有机相配比、皂化率、平衡pH值、温度、相比对Co萃取率的影响。实验结果表明,在有机相体积分数50.5%、皂化率50%、料液pH值2.4~2.6、相比1∶1、温度30℃、时间5min、萃取级数4级的条件下,Co萃取率大于95%;负载有机相经纯水洗涤后,在H2SO4浓度0.7mol/L、相比8∶1、时间5min、温度40℃、反萃级数4级的条件下,Co反萃率达到94%以上,反萃液Co浓度达到20g/L,与Fe、Mn、Mg等杂质实现分离并达到富集效果。
The extraction process of Co from Cu-extractant HBL110 by Mextral 984H was used to recover Co from the hematite of Fe-containing cobalt-cobalt heap leaching solution. The effects of organic phase ratio, saponification ratio, equilibrium pH value and temperature were investigated. Effect of extraction rate. The experimental results showed that under the condition of the volume fraction of organic phase 50.5%, the saponification rate 50%, the pH value of feed liquid 2.4 ~ 2.6, the ratio of 1: 1, the temperature 30 ℃, the time 5min and the extraction stage 4, the Co extraction rate More than 95%. After the organic phase was washed with pure water, under the conditions of H2SO4 concentration of 0.7mol / L, 8:1, 5min, 40 ℃ and 4 stages of stripping, the CO recovery rate reached 94 %, Stripping solution Co concentration of 20g / L, with Fe, Mn, Mg and other impurities to achieve separation and achieve enrichment effect.