有色金属科学与工程2025，Vol.16Issue(4)：520-526,543,8.DOI:10.13264/j.cnki.ysjskx.2025.04.003
高镁硫酸锌溶液氟化沉淀脱镁工艺优化
Process optimization of magnesium removal from high-magnesium zinc sulfate solution by fluorination precipitation
摘要
Abstract
Fluoride precipitation is considered one of the most effective techniques for magnesium removal in hydrometallurgy.However,this method has the problem of introducing a large amount of fluorine introduction and poor filtration performance of precipitates.Given this,the theoretical calculations of the fluoride precipitation were carried out.Then,the removal of magnesium from zinc sulfate solution by the fluoride precipitation method was investigated through the characterization of the solution composition precipitates,and the treatment of the precipitated liquid and precipitates.The results showed that the feeding modes and reaction temperature significantly affected the fluorine introduction and filtration performance of precipitates.Under the conditions of a fluorine-magnesium ratio of 0.75(zinc fluoride dosage of 21.88 g),a temperature of 60 ℃ and a feeding time of 16 min,the removal rate of magnesium could reach 64.42%.In contrast,the fluorine concentration in the liquid after magnesium removal was only 0.22 g/L.Fluoride in the final liquid could be effectively removed using La(OH)3,and its removal rate could reach more than 82%.After washing twice with pure water,the zinc in the washing products could be reduced from 17.12%to 0.67%,which can meet the technical specifications of industrial magnesium fluoride(YS/T 691-2009).关键词
氟化沉淀/除镁/湿法炼锌/净化/硫酸锌Key words
fluoride precipitation/magnesium removal/zinc hydrometallurgy/purification/zinc sulfate分类
矿业与冶金引用本文复制引用
刘梦辉,李玉虎,杨裕东,王应哲,孙亮..高镁硫酸锌溶液氟化沉淀脱镁工艺优化[J].有色金属科学与工程,2025,16(4):520-526,543,8.基金项目
江西省双千计划创新创业领军人才项目(jxsq2018106051) （jxsq2018106051）
江西理工大学清江青年拔尖支持计划资助项目(JXUSTQJBJ2018005) （JXUSTQJBJ2018005）
