中国非金属矿工业导刊Issue(2)：59-62,4.
高岭土除铁增白研究
Research on Iron Removal and Whitening of Kaolin
摘要
Abstract
Based on experimental data from iron removal and whitening of kaolin,when the pH value of the kaolin slurry is 1.9 and the amount of sodium hydrosulfite added is 1.5%,the chemical bleaching method for iron removal and whitening exhibits significant effects.The iron oxide content of kaolin decreases from 1.02%to 0.69%,and the whiteness increases from 72.10 to 83.82.The use of superconducting magnetic separation for iron removal from kaolin has certain effects,but it has limited impact on enhancing the whiteness of kaolin.By combining superconducting magnetic separation with chemical bleaching for iron removal,using a magnetic field strength of 3T and a slurry flow rate of 2cm/s,the kaolin slurry after superconducting magnetic separation is adjusted to a pH value of 1.8,and 0.5%sodium hydrosulfite is added.The iron oxide content of kaolin is 0.57%,and the whiteness reaches 86.18.Compared with chemical bleaching for iron removal,the combined iron removal method reduces the amount of sulfuric acid by 55%and the amount of sodium hydrosulfite by 66%,achieving the same iron removal and whitening effects.关键词
高岭土/化学漂白/超导磁选/连二硫酸钠/联合除铁Key words
kaolin/chemical bleaching/superconducting magnetic separation/hydrosulfite/combined iron removal分类
化学化工引用本文复制引用
张飞,陈喜冰,蒋国明,吴真远,张浪,左亚娟,石晓岚..高岭土除铁增白研究[J].中国非金属矿工业导刊,2025,(2):59-62,4.基金项目
中国建材集团"揭榜挂帅"关键核心技术攻关项目"高岭土矿物功能材料绿色高效制备及应用"(编号:2024YYSF06). （编号:2024YYSF06）
