提钴铜萃余液中铁铝锰的深度脱除试验

Experiment on deep removal of Fe,Al and Mn in copper raffinate

本文对非洲某湿法氧化铜矿的铜萃余液中的铁、铝、锰等杂质离子进行了深度除杂研究。结果表明,采用CaO除杂-P204八级逆流萃取工艺,Mn的去除率可达91%以上,其他杂质脱除率均在95%以上,Co的保留率可达95%以上。CaO沉淀除杂最佳工艺条件:CaO加入量为1.0 g/30 mL(调制成70%浓度料浆),沉淀温度为室温,沉淀时间为10 min;P204萃取除杂最佳工艺条件:萃取温度为室温,萃取pH=2.5~3.0,萃取剂皂化率为40%,萃取剂浓度为10%,相比(O/A)1∶1,萃取时间10 min。

This paper made an in-depth research on removal of impurity ions of Fe,Al and Mn in copper raffinate of copper oxide ore with hydrometallurgical process in Africa.The results showed that by using the process of removing impurities with CaO-P204 eight-stage counter-current extraction,the Mn removal efficiency can be above 91%.The removal efficiency for other impurities can be above 95%,while the retaining rate of Co can be above 95%.The optimum process conditions for CaO precipitation and impurity removal are follows:the CaO dosage is 1.0 g/30 mL(prepared into the slurry with a density of 70%),the precipitation temperature is room temperature and the precipitation time is 10 min.The optimum process conditions for P204 extraction and impurity removal are follows:extraction temperature is room temperature,extraction pH is 2.5-3.0,saponification rate of extractant is 40%,extractant concentration is 10%,phase ratio(O/A)is 1∶1 and extraction time is 10 min.