萃取冶金过程中除油回收萃取有机相的生产实践

Production Practice of Oil Removal and Recovery of Organic Phase in Extraction Metallurgy Process

本文介绍了某企业萃取冶金生产过程中对萃余液/反萃液除油并回收萃取有机相的实际情况,3个串联的萃取系统采用的改性材料除油器一次除油率分别为78.79%、19.10%和16.42%,除油后溶液含油量远大于10 mg/L,无法满足设计要求。通过分析除油原理,在原有流程除油器前端新增"溶气泵+气浮澄清箱"的组合装置,在除油器末端增加活性炭吸附罐保安过滤装置。经过三次除油后,除油率分别达到了98.69%、95.11%和95.17%,除油后溶液平均含油量小于10 mg/L,萃取有机相回收率达到60%以上,除油回收萃取剂效果较好。

This paper introduced the practice of removing oil from the residual liquid/stripping liquid and recovering the extracted organic phase in the extraction metallurgy process of an enterprise.The oil re-moval rates of the designed modified material deoilers in three cascaded extraction systems were 78.79%,19.10%and 16.42%,respectively,and the oil content of the solution after oil removal was more than 10 mg/L,which cannot meet the design requirements.By analyzing the principle of oil removal,a combined device of dissolved air pump and air flotation clarification box were added at the front of the oil remover,and a activated carbon adsorption tank was added at the end of the oil remover.After three times of oil removal,the oil removal rate reached 98.69%,95.11%and 95.17%,respectively,and the average oil content of the solution was less than 10 mg/L,and the recovery rate of the extraction organic phase reached more than 60%.The effect of removing oil and recovering extractant was better.