Fe-PGMs合金废电解液溶析结晶制备硫酸亚铁  

Preparation of ferrous sulfate by solution crystallization of waste electrolyte produced by electrolysis of Fe-PGMs alloy

作　　者：郭塍 肖发新 张亚博 罗志华 闫耀宇 孙树臣 涂赣峰 GUO Cheng;XIAO Faxin;ZHANG Yabo;LUO Zhihua;YAN Yaoyu;SUN Shuchen;TU Ganfeng(School of Metallurgy,Northeastern University,Shenyang 110819,China;Key Laboratory for Recycling of Nonferrous Metal Resources(Shenyang),Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]沈阳市有色金属资源循环利用重点实验室,沈阳110819

出　　处：《贵金属》2023年第S01期50-55,共6页Precious Metals

基　　金：中色集团科技项目(2022KJJH09);国家重点研发计划(2019YFC1907504)。

摘　　要：以Fe-PGMs合金电解精炼产生的废电解液为原料,无水乙醇作为溶析剂,使用溶析结晶法从废电解液中将硫酸亚铁结晶析出。考察了溶析时间、乙醇与水溶液体积比、溶析温度、搅拌速度、陈化时间、无水乙醇滴加方式对硫酸亚铁结晶率的影响。结果表明,在溶析时间60 min、无水乙醇与水溶液体积比为1:1、溶析温度10℃、搅拌速度200 r/min、陈化时间60 min、乙醇滴加方式为逐滴加入时硫酸亚铁结晶率达到最大92.98%。此工艺避免了电解过程中废电解液对环境的污染,实现了电解Fe-PGMs合金中电解液及Fe-PGMs合金酸浸液的循环利用。Ferrous sulfate was crystallized from the waste electrolyte produced in electrolytic refining of Fe-PGMs alloy by solution crystallization method using anhydrous ethanol as the dissolution solvent.The effects of dissolution time,volume ratio of ethanol to water solution,dissolution temperature,stirring speed,aging time,and anhydrous ethanol dripping method on the crystallization rate of ferrous sulfate were investigated.The results showed that the maximum crystallization rate of ferrous sulfate reached 92.98%when the dissolution time was 60 min,the volume ratio of anhydrous ethanol to aqueous solution was 1:1,the dissolution temperature was 10℃,the stirring speed was 200 r/min,the aging time was 60 min,and the ethanol was added dropwise.This process not only avoids environmental pollution caused by waste electrolyte during the electrolysis process,reduces the production of finished products,but also achieves the recycling and utilization of electrolyte in electrolytic Fe-PGMs alloys and Fe-PGMs alloy acid leaching solution,which is of great significance.

关 键 词：硫酸亚铁 Fe-PGMs合金 电解精炼 溶析结晶 无水乙醇 

分 类 号：TF83[冶金工程—有色金属冶金]