钨酸钠浓料铝盐除氟工艺探讨  

Study on removal of fluoride by aluminum salt from concentrated sodium tungstate

作　　者：赖星任 张龙辉 周加坤 张忠堂[1] LAI Xing-ren;ZHANG Long-hui;ZHOU Jia-kun;ZHANG Zhong-tang(School of Metllurgy Engineering.Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Research and Development Center,Chongyi Zhangyuan Tungsten Industry Co.,Ltd.,Chongyi 341300,Jiangxi,China;Engineering Power Department,Baosteel Desheng Stainless SteelCo.,Ltd.,Fuzhou 350601,Fujian,China)

机构地区：[1]江西理工大学冶金工程学院,江西赣州341000 [2]崇义章源钨业股份有限公司研发中心,江西崇义341300 [3]宝钢德盛不锈钢有限公司工程动力部,福建福州350601

出　　处：《中国冶金》2021年第4期118-121,共4页China Metallurgy

基　　金：国家自然科学基金资助项目(52004111);江西理工大学博士启动基金资助项目(205200100457)。

摘　　要：以黑白钨混合矿碱分解工艺中的钨酸钠浓料液为研究对象,研究了时间、温度、pH、加料量以及三氧化钨浓度对硫酸铝除氟效果的影响。结果表明,在最佳工艺条件下,调节pH为12.7,温度为25℃,加料量摩尔分数x(Al)∶x(F)为2.1,反应时间为10 min,三氧化钨浓度为215 g/L,此时溶液中氟浓度可降至100 mg/L以下。进一步研究表明,钨酸钠浓料中三氧化钨浓度越高,硫酸铝除氟效果越差,且会增大除氟渣中钨的含量。The concentrated sodium tungstate solution in the process of alkali decomposition of mixed wolframite was studied. The effects of reaction time, reaction temperature, pH, tungsten trioxide concentration and feed rate on the removal efficiency of fluoride by aluminum sulfate were investigated, indicating that the concentration of fluorine in the solution can be reduced to less than 100 mg/L under the optimum conditions of pH is 12.7, temperature is 25 ℃, x(Al)∶x(F) is 2.1, reaction time is 10 min and the concentration of tungsten trioxide is 215 g/L. Further study shows that the higher the concentration of tungsten trioxide in concentrated sodium tungstate, the worse the effect of aluminum sulfate on fluoride removal, and the content of tungsten in slag increases.

关 键 词：钨酸钠溶液 硫酸铝 除氟 三氧化钨 湿法冶金 

分 类 号：TF841.1[冶金工程—有色金属冶金]