氨水—硫酸铵体系中Mextral 54-100萃取铜研究

以Mextral 54-100为萃取剂,对某铜铝废料经氨性体系浸出后所得料液进行溶剂萃取,回收金属铜。分别考察了萃取剂浓度、相比、时间、水相初始pH对铜萃取的影响。溶剂萃取最优工艺条件:萃取剂体积浓度40%、相比O/A=1/1、混合时间4min。此条件下单级萃铜能力达29.66g/L。经过萃取、洗涤后,采用170g/L硫酸进行反萃,铜反萃率达92.59%。通过McCabe-Thiele图解法确定了萃取段的理论级数,并进行了二级模拟逆流试验验证,最终萃余液含铜约0.06g/L。

Solvent Extraction of Copper from Ammoniacal/Ammonium Sulfate Medium with Mextral 54-100

Solvent extraction of copper from ammoniacal/ammonium sulfate medium using Mextral 54-100 was investigsted. Effects of extractant concentration, phase ratio, extraction time and pH value of initial leach solution on copper extraction were examined. The results show that capacity of one-stage copper extraction is 29.66 g/L under the optimum conditions including 40% volume concentration of extractant, phase ratio of O/A=1/1, and extraction time of 4 min. Copper stripping rate with 170 g/L H2SO4 is 92.59% from loaded organic phase. Theoretical stage of extraction is determined by of McCabe-Thiele Isothermy Graphic Method. After two-stage countercurrent extraction, the simulation results correspond with the data, and copper concentration in raffinate is about 0.06 g/L.