摘要
采用氧化—还原—酸洗除铁、除有机杂质,在50℃用3%过氧化氢将亚铁化合物氧化成三价铁,再使用连二亚硫酸钠还原成可溶性较高的二价铁,经硫酸洗涤后除去,除铁率为41%～61%,产品白度明显提高。
Iron removal in montmorillonite is a hard nut to crack, especial ferrous disulfide. A new method reduction-oxidation was developed to reduce iron and remove organo-impurity. The factors that influence iron removal and bleaching result were investigated, inculding temperature, dosage of H2O2 and Na2S2O4, concentration of H2SO4 and so on. In this method 3% H2O2 was used to oxidate Fe（Ⅱ） to Fe（Ⅲ） and wipe off organo-impurity at 50℃. And then Fe（Ⅲ） was reduced to Fe（Ⅱ） by Na2S2O4, which followed by scrubbing with H2SO4. The result showed that 41% -61% of iron was removed and whiteness was improved obviously.
出处
《中国非金属矿工业导刊》
2008年第1期31-32,共2页
China Non-Metallic Minerals industry
关键词
膨润土
氧化还原
除铁
增白
montmorillonite
reduction-oxidation
iron removal
bleaching
