摘要
研究了在HCl-Na_(2)CrO_(4)体系中对铬铁矿进行多级浸出,并探讨了铬铁矿中主要金属元素的浸出动力学。结果表明:在粒径45~75μm、氧化剂Na_(2)CrO_(4)用量为理论量0.6倍、反应时间5h、反应温度453.15K、料球质量比1/1、搅拌速度30r/min、液固体积质量比4mL/1g最佳条件下进行3级循环浸出,铬、铁、铝、镁浸出率分别可达91.98%、94.54%、76.62%和78.03%;铬铁矿的酸浸反应受界面化学反应控制,温度在373.15~473.15K范围内,铬、铁、铝、镁的浸出表观活化能分别为45.80、40.43、42.08和43.54kJ/mol,浸出效果较好。
The multi-stage leaching of chromite in HCl-Na_(2)CrO_(4) system has been studied,and the leaching kinetics of main metal elements in chromite has been discussed.The results show that under the optimal conditions of particle size of 45~75μm,oxidizing agent Na_(2)CrO_(4) dosage of 0.6 times of theoretical dosage,reaction time of 5 h,reaction temperature of 453.15 K,ball to material mass ratio of 1/1,stirring speed of 30 r/min,liquid volume to solid mass ratio of 4 mL/1 g,the three-stage cyclic leaching is carried out,the leaching rates of Cr,Fe,Al and Mg can reach 91.98%,94.54%,76.62% and 78.03%,respectively.The acid leaching reaction of chromite is controlled by interfacial chemical reaction.The apparent activation energies of Cr,Fe,Al and Mg are 45.80,40.43,42.08 and 43.54 kJ/mol,respectively.In the range of 373.15~473.15 K,and the leaching effect is good.
作者
蹇成宗
田仪娟
蒋子文
闫春宇
全学军
李纲
JIAN Chengzong;TIAN Yijuan;JIANG Ziwen;YAN Chunyu;QUAN Xuejun;LI Gang(Institute of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China)
出处
《湿法冶金》
CAS
北大核心
2024年第4期407-419,共13页
Hydrometallurgy of China
基金
重庆英才计划项目(CQYC20210309538)。
