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将原本用于从酸浸出液中萃取铜的萃取剂LIX84-I用来从氨浸出液中萃取铜,获得了成功,并实现了工业化生产.实验室研究表明,在萃取原液含铜浓度3g/L,pH>4.22,相比1:1,氨浓度1.5mol/L,混合时间3min的条件下,LIX84-I是从氨浸出液中萃取铜的有效萃取剂,萃取率可达到99.9%.在工业生产中发现,将氨浸出液中固体微粒的含量控制在不超过120mg/L和维持二氧化碳浓度不低于0.5mol/L,是保证生产上铜萃取作业顺利进行的必要条件.用电积残液(酸浓度约200g/L)返回反萃作业作为反萃剂使用,可以进行铜的反萃,反萃率可达到99.94%.
LIX84-I, an extractant originally used to extract copper from acid leachate, was used to extract copper from ammonia leachate, which was successful and industrialized.Laboratory studies showed that when the concentration of copper in extract solution was 3 g / L, pH> 4.22, compared with 1: 1, ammonia concentration 1.5mol / L, mixing time 3min under the conditions, LIX84-I is extracted from the ammonia leaching solution of copper extractant, extraction rate can reach 99.9% .In industrial production It is found that controlling the content of solid particles in the ammonia leachate to not more than 120 mg / L and maintaining the carbon dioxide concentration not less than 0.5 mol / L are necessary conditions for ensuring smooth copper extraction operation in production. About 200g / L) back to the stripping operations as a stripping agent, copper stripping can be carried out, stripping rate of up to 99.94%.