针铁矿法分离铬铁矿硫酸浸出液中Cr3＋与Fe3＋  

Separation of Cr^(3+) and Fe^(3+) from Sulphuric Acid Leaching Solution of Chromite by Goethite Method

作　　者：刘佳宁[1] 姜茂发[1] 李昱彤[1] 珅刘美 

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819

出　　处：《过程工程学报》2015年第2期242-246,共5页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展规划(973)基金资助项目(编号:2012CB626812);国家自然科学基金资助项目(编号:51304042);国家大学生创新创业训练计划资助项目(编号:140061)

摘　　要：采用针铁矿法分离铬铁矿硫酸浸出溶液中的Cr3+与Fe3+.结果表明,以Fe2(SO4)3溶液中加入适量KOH后生成的Fe(OH)3为前驱体,在120℃的水热条件下保温8 h后可制备出晶体发育良好的针铁矿晶种.将铬铁矿硫酸浸出液的Fe3+浓度稀释至1 g/L以下并加入针铁矿晶种,在p H=2.5、温度90℃条件下保温4 h后,Fe3+以针铁矿晶体沉淀析出,能实现铁与铬的分离,除铁率为97%,铬损失率为33%.Separation of Cr3＋ and Fe3＋ from in sulfuric acid leaching solution of chromite with goethite was studied with experiments. The result show that Fe（OH）3 produced by adding appropriate amount of mineralizing agent （KOH） into Fe2（SO4）3 solution can be transformed into goethite inoculating crystals in good crystalline form under the conditions of 8 h heating at 120 ℃. After diluting the sulfuric acid leaching solution of chromite to the concentration of Fe3＋ at 1 g/L and then adding goethite inoculating crystals to the solution, the separation between Fe3＋ and Cr3＋ can be accomplished under the conditions of pH 2.5 and 90 ℃ heating for 4 h. 97% of iron is precipitated and 33% of chromium lost.

关 键 词：铬铁矿 硫酸浸出 针铁矿 CR3+ FE3+ 分离 

分 类 号：TD982[矿业工程—选矿]