盐酸酸浸镁还原渣提高有效硅含量  

Improvement of Effective Silicon Content in Magnesium Reduction Slag Leached by Hydrochloric Acid

作　　者：梁一然 李明照[1] 梁晓波[1] 王国卫[1] 张耀斌[1] 毛嘉[1] 任川兮 冯小琴[2] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]北方自动控制技术研究所,太原030006

出　　处：《有色金属（冶炼部分）》2015年第7期55-59,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：山西省国际科技合作项目(2014081001-2)

摘　　要：将镁还原渣加石英砂焙烧后,用盐酸酸浸并将酸浸渣加助剂焙烧,以提高易于植物吸收的有效硅含量。结果表明,镁渣加入石英砂焙烧后采用4mol/L盐酸浸出,可使其中的氧化镁、氧化钙、氧化铁溶解进入溶液;酸浸渣焙烧后主要组成为二氧化硅,酸浸渣中加入助剂KOH于200℃焙烧6h后,有效硅含量可达25.62%,比原始镁渣提高了488.97%。Magnesium reduction slag was roasted with quartz sand and leached by hydrochloric acid and acid leaching residues were roasted with additives to improve effective silicon content for plant absorption.The results show that MgO,CaO,and Fe2O3 in magnesium reduction slag are dissolved into solution after roasted with quartz sand and leached by 4mol/L hydrochloric acid.The main component of acid leaching residues is silicon dioxide after roasting.The effective silicon content is improved from 4.35% of initial magnesium reduction slag to 25.62% after acid leaching residues are roasted with additives of KOH at200 ℃for 6h.

关 键 词：镁还原渣 酸浸 焙烧 有效硅 正交试验 

分 类 号：X705[环境科学与工程—环境工程]