湿法炼锌过程中纳米级二氧化硅除氟技术工艺研究  

Investigation of Fluorine Removal with Nanosilica During Zinc Hydrometallurgy Process

作　　者：段良洪 郭远贵 刘伟 王敏杰 曹文法 尹健夫 DUAN Liang-hong;GUO Yuan-gui;LIU Wei;WANG Min-jie;CAO Wen-fa;YIN Jian-fu(Chenzhou Fengyue Environmental Science and Technology Co Ltd,Chenzhou 423000,Hunan,China;Chenzhou Municipal Product Quality Supervision and Inspection Institute,Chenzhou 423000,Hunan,China)

机构地区：[1]郴州丰越环保科技有限公司,湖南郴州423000 [2]郴州市产商品质量监督检验所,湖南郴州423000

出　　处：《矿冶工程》2022年第2期113-116,共4页Mining and Metallurgical Engineering

摘　　要：以工业水玻璃为原料,采用液相沉淀法制备了纳米级二氧化硅,并将其应用于锌电积液除氟。实验结果表明,未经焙烧处理的纳米级二氧化硅无除氟能力;纳米级二氧化硅经400℃、4 h焙烧后,在加入量为锌电积液中F^(-)质量的60倍、锌电积液硫酸浓度145 g/L、除氟温度40℃、除氟时间3 h条件下,纳米级二氧化硅吸附氟容量为13 mg/g,对锌电积液中氟脱除率达到78.05%,除氟后溶液含氟0.09 g/L,满足锌电积工序要求。Nanosilica was prepared by liquid phase precipitation process with industrial water glass as raw material,and then applied for fluorine removal from electrolyte of zinc electrowinning.Results show that the uncalcined nanosilica is not capable to remove the fluorine.However,after the nanosilca was subjected to a 4 h-calcination at 400 ℃,it was added into the electrolyte for fluorine removal with an amount of 60 times the mass of fluorine in the solution.After 3 h defluorination reaction at 40 ℃ with the sulfuric acid concentration of the solution at 145 g/L,the fluoride removal rate of the electrolyte was up to 78.05%,showing the fluoride adsorption capacity of nanosilica was 13 mg/g.The solution after fluorine removal only contained 0.09 g/L fluorine,meeting the requirements for zinc electrowinning process.

关 键 词：纳米二氧化硅 吸附 锌电积液 除氟 

分 类 号：TF813[冶金工程—有色金属冶金]