提升白云母白度试验  

Experimental Study on Improving Whitening of Muscovite

作　　者：杜昌运 任浏祎[1,2] 叶子乾 焦吴极 樊晨宇 DU Chang-yun;REN Liu-yi;YE Zi-qian;JIAO Wu-ji;FAN Chen-yu(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]矿物资源加工与环境湖北省重点实验室,武汉430070

出　　处：《有色金属（冶炼部分）》2023年第8期96-103,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金联合基金资助项目(U2003129);国家大学生创新创业训练计划资助项目(S202210497327)。

摘　　要：白云母经磨矿后产生铁质污染,严重影响产品质量。引入二氧化硫脲作为白云母除铁增白的还原剂,并系统研究了化学浸出除铁和氧化还原除铁对白云母粉白度的影响。在浸出剂为9%的草酸溶液、液固比3∶1、浸出温度80℃、浸出时间40 min的条件下,可以得到白度为70.300%的白云母产品。然后经过氧化剂NaClO溶液氧化,并在还原剂用量6%、pH=12、还原温度60℃、还原时间15 min的条件下,得到白度为76.114%的白云母产品,达到了大多数高端产品对白云母粉白度为75.000%的要求。The iron pollution of muscovite after grinding seriously affects the product quality.Thiourea dioxide was introduced as a reducing agent for removing iron and brightening of muscovite,and the effects of chemical leaching and oxidation-reduction removal of iron on the whiteness of muscovite were systematically studied.The muscovite product with a whiteness of 70.300%can be obtained under the conditions including leaching agent of 9%oxalic acid solution,L S of 3∶1,leaching temperature of 80℃,and leaching time of 40 minutes.Then,the muscovite product with a whiteness of 76.114%is obtained by oxidizing with the oxidant NaClO solution and under the conditions of reducing agent dosage of 6%,pH=12,reduction temperature of 60℃,and reduction time of 15 minutes,which meets the requirements of 75.000%whiteness of white mica for most high-end products.

关 键 词：白云母 铁质污染 酸浸 氧化还原反应 白度 

分 类 号：TF803.25[冶金工程—有色金属冶金]