摘要
研究了还原水解-镁盐共沉淀法对Na2WO4溶液深度除铬的工艺,并用碱浸法一次实现了铬镁渣中的钨铬分离。结果表明:在70℃下加入3倍理论量的Na2S,控制pH值为8~9,反应0.5 h,加入1%的MgSO4溶液继续反应0.5 h后过滤,滤液m(Cr)/m(WO3)<1.6×10^-4;铬镁渣浸出终点碱度控制在30~40 g/L,最终可实现WO3回收率>96%,浸出液m(Cr)/m(WO3)<1.6×10^-4。
The process of deep chromium removal from Na2WO4 solution by reductive hydrolysis-magnesium salt coprecipitation was studied,and the separation of tungsten from chromium in chromium magnesium slag was realized by once alkali leaching.The results show that after adding 3 times the theoretical amount of Na2S at 70℃,controlling the pH value at 8~9 for 0.5 h,adding 1%MgSO4 solution to continue the reaction for 0.5 h,and then filtrating,the ratio of Cr content to WO3 content in the filtrate is less than 1.6×10^-4.When the final alkalinity of chromium magnesium slag leaching is controlled at 30~40 g/L,WO3 recovery is more than 96%,and the ratio of Cr content to WO3 content in the leaching solution is less than 1.6×10^-4.
作者
雷吟春
欧阳海波
曹育龙
龙扬
赵玲平
LEI Yin-chun;OU-YANG Hai-bo;CAO Yu-long;LONG Yang;ZHAO Ling-ping(Hunan Maotian Century New Material Co.,Ltd.,Changsha 410600,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2019年第6期1-4,共4页
Rare Metals and Cemented Carbides
关键词
Na2WO4溶液
除铬
镁盐
共沉淀
铬镁渣
碱浸
Na2WO4 solution
chromium removal
magnesium salt
coprecipitation
chromium magnesium slag
alkali leaching
作者简介
通讯作者:雷吟春(1982-),女,硕士,工程师,主要从事钨资源开发与利用生产技术管理工作,E-mail:290995711@qq.com。
