硫酸铵焙烧铝土矿提取氧化铝及氧化铁  

EXTRACTION OF ALUMINUM OXIDE AND IRON OXIDE FROM BAUXITE ORE BY ROASTING WITH AMMONIUM SULFATE

作　　者：刘佳囡 翟玉春[1,2] 贾志良[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]东北大学秦皇岛分校,河北秦皇岛066004

出　　处：《矿冶》2015年第3期45-49,共5页Mining And Metallurgy

基　　金：国家重点基础研究发展计划项目(2007CB613603)

摘　　要：以三水铝石矿、硫酸铵为原料,采用硫酸铵两段焙烧法提取铝土矿中的铝和铁,通过单因素试验研究了常压条件下硫酸铵焙烧铝土矿过程中低温段、高温段焙烧温度、低温段、高温段焙烧时间、铵矿比对铝土矿中氧化铝和氧化铁的提取率的影响。结果表明,粒度小于74μm的铝土矿在铵矿比n=4,低温段焙烧温度300℃,焙烧时间60 min,高温段焙烧温度450℃,焙烧时间60 min的条件下,多次验证Al2O3的提取率均在98%以上,Fe2O3的提取率均在88%以上。使铝土矿中的铝、铁、硅得到了有效地分离。Using bauxite ore and ammonium sulfate as raw materials , Al203 and Fe203 were extracted from bauxite ore by the method of ammonium sulfate roasting. The optimum conditions, which could guarantee the ex- traction rate of Al2 O3 more than 98% and the extraction rate of Fe2 O3 more than 88% , were figure out through sin- gle-factor experiment as follows ： molar ratio of ammonium sulfate-to-bauxite 4, low temperature reaction at 300 ℃ , reaction time 60 rain; high temperature reaction at 450 ℃ , reaction time 60 min. The components of aluminum, i- ron and silicon in the bauxite has been separated effectively.

关 键 词：铝土矿 硫酸铵 氧化铝 氧化铁 焙烧条件 

分 类 号：TF821[冶金工程—有色金属冶金]