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.
作者
杜昌运
任浏祎
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)
出处
《有色金属（冶炼部分）》
CAS
北大核心
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)。
关键词
白云母
铁质污染
酸浸
氧化还原反应
白度
muscovite
iron pollution
acid leaching
redox reaction
whiteness
