碱性氰化液中萃取金的研究进展

本文全面概述了各种有机胺类、膦氧化物、烷基磷酸酯、二元混合协同萃取剂和胍类液体及树脂萃取剂萃取和反萃取金的体系。二元混合协同萃取比单一萃取剂的萃取效果好。文中描述了胍类树脂萃取剂的试验级和示范级萃取和反萃取试验,并介绍了树脂吸附(RIS)和碳吸附(CIS)用于碱性氰化液中提金的生产及成本。胍类树脂萃取剂因选择性好、耗损少、易反萃,最具有应用价值。

RESEARCH PROGRESS OF SOLVENT EXTRACTION OF GOLD FROM ALKALINE CYANIDE SOLUTION

This paper summarizes the extraction and stripping systems of different varies of organic alamines,phosphine oxides,alkyl phosphate esters,two-mixed-cooperate extractants,liquid guanidine and resin guanidine.The extraction effect of two-mixed-cooperate extractants is better than the one of single extractant.The continuous resin in solution(RIS) extraction and elution tests on trial-bench scale and demonstrating plant scale were presented.The summary of the production and operating cost of RIS and CIS(carbon in solution) in the extracting gold from alkaline cyanide solution was listed in this paper.Because of better selectivity,less loss and easier stripping,the guanidine resin extractant is the worthiest of application at present.