材料与冶金学报2025，Vol.24Issue(4)：356-361,369,7.DOI:10.14186/j.cnki.1671-6620.2025.04.006
低品位菱镁矿在硫酸溶液中的浸出特性及动力学
Leaching characteristics and kinetics of low-grade magnesite ore in sulfuric acid solution
摘要
Abstract
The leaching characteristics and kinetics of the main elements in the sulfuric acid solution of the calcined low-grade magnesite calcination have been systematically studied.Under the conditions of leaching time of 15 minutes,leaching temperature of 40℃,sulfuric acid concentration of 1.5 mol/L,and liquid-to-solid ratio of 15 mL/g,the leaching rate reaches 90.47％ for magnesium,84.45％ for calcium,12.18％ for silicon,55.47％ for iron,and 10.34％for aluminum.The kinetic results reveal that the leaching process of magnesium,calcium,and silicon is jointly controlled by chemical reaction and ash layer diffusion,with activation energy Ea of 30.20 kJ/mol,33.56 kJ/mol,and 36.46 kJ/mol,respectively.In contrast,the leaching of iron and aluminum is predominantly controlled by ash layer diffusion,exhibiting activation energy Ea of 5.05 kJ/mol and 14.06 kJ/mol,respectively.The ash layer formed by elements such as silicon and aluminum emerges as the primary resistance to mass transfer and diffusion.关键词
菱镁矿/硫酸/浸出/动力学Key words
magnesite/sulfuric acid/leach/kinetic分类
矿业与冶金引用本文复制引用
高菲,史新宇,唐晓佳,孟庆臻..低品位菱镁矿在硫酸溶液中的浸出特性及动力学[J].材料与冶金学报,2025,24(4):356-361,369,7.基金项目
辽宁省教育厅基本科研项目(LJKFZ20220167) （LJKFZ20220167）
大连海事大学博联科研基金项目(3132024603). （3132024603）
