Sustainable Mining and Metallurgy

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 removal 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 10mg/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 10mg/L, and the recovery rate of the extraction organic phase reached more than 60%. The effect of removing oil and recovering extractant was better.