低温酸浸磷钾伴生矿提钾工艺研究  

Potassium extraction from phosphorus-potassium associated ore at low temperature

作　　者：张爽[1] 吕仁亮[1] 王为国[1] 马家玉[2] 汪铁林[2] 王存文[2] 

机构地区：[1]武汉工程大学化工与制药学院,湖北武汉430073 [2]绿色化工过程教育部重点实验室,湖北武汉430073

出　　处：《现代化工》2015年第5期96-100,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(51274153);湖北省自然科学基金重点项目(2011CDA120);湖北省中低品位磷矿资源开发利用协同创新中心开放基金项目(P201105)

摘　　要：研究了盐酸和萤石低温酸浸磷钾伴生矿提钾的工艺过程。探讨了各工艺参数对钾浸出率的影响,并采用响应面法对酸浸工艺进行了优化,得出最佳工艺条件为:m(萤石)/m(矿粉)为0.2,盐酸质量分数为22.5%,盐酸用量为79.7 m L,加热温度为92.2℃,反应时间为4.2 h。在此条件下模型预测的钾元素理论浸出率为92.8%,实验验证浸出率为91.3%。The leaching of potassium from phosphorus-potassium ore using hydrochloric acid and fluorite at a low temperature is studied. The effects of process parameters on the leaching rate of potassium are investigated. The leaching process is optimized and an optimum condition is obtained by response surface method. The optimum condition is shown as follows ：92.2℃ of temperature ,0. 2 of feed ratio,22. 5% of hydrochloric acid concentration,79.7 mL of hydrochloric acid dosage and 4. 2 hours of reaction time. The model predicts that the leaching rate can be 92. 82%, while the experimental result is 91.3%.

关 键 词：磷钾伴生矿 提钾 低温 响应面法 

分 类 号：TF826[冶金工程—有色金属冶金]