Oxidative acid leaching of mechanically activated sphalerite

被引：13

作者：

Tian, L. ^{[1
,2
]}

Zhang, T. A. ^{[1
]}

Liu, Y. ^{[1
]}

Lv, G. Z. ^{[1
]}

Tang, J. J. ^{[1
]}

机构：

[1] Northeastern Univ, Minist Educ, Key Lab Ecol Utilizat Multimetall Mineral, Shenyang, Liaoning, Peoples R China

[2] Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou, Peoples R China

来源：

CANADIAN METALLURGICAL QUARTERLY | 2018年 / 57卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Sphalerite; Zn extraction; mechanical activation; leaching kinetics; activation energy; reaction orders; DISSOLUTION; ZINC; REACTIVITY; KINETICS;

D O I：

10.1080/00084433.2017.1367884

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The pressure leaching kinetics of mechanically activated sphalerite was investigated in this work. X-ray diffraction and scanning electron microscopy were used to characterise the influences of crystalline structure and morphology, respectively. A laser particle size analyser and specific surface area tester were used to determine the particle size and specific surface area, respectively. Compared to the non-activated sample, the activated samples demonstrated distinct physicochemical properties with higher reaction efficiencies and increased Zn recovery ratios. The activation energy of sphalerite decreased from 69.96 to 45.91, 45.11, and 44.44 kJ mol(-1) as the activation time increased from 0 to 30, 60, and 120 min, respectively. The reaction orders for the H2SO4 solutions of the sphalerite samples activated for 0, 30, 60, and 120 min were 1.832, 1.247, 1.214, and 1.085, respectively, which indicated that the dependency of the sphalerite leaching process on H2SO4 could be reduced by means of mechanical activation.

引用

页码：59 / 69

页数：11

共 26 条

[11] Mechanochemical effects on the molybdenite roasting kinetics [J].