Leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system

被引：50

作者：

Wang Rui-xiang ^{[1
,2
]}

Tang Mo-tang ^{[1
]}

Yang Sheng-hai ^{[1
]}

Zhagn Wen-hai ^{[1
]}

Tang Chao-bo ^{[1
]}

He Jing ^{[1
]}

Yang Jian-guang ^{[1
]}

机构：

[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China

[2] Jiangxi Univ Sci & Technol, Sch Mat & Chem Engn, Ganzhou 341000, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2008年 / 15卷 / 05期

基金：

中国国家自然科学基金;

关键词：

NH3-NH4Cl-H2O system; low-grade zinc oxide ore; leaching; kinetics;

D O I：

10.1007/s11771-008-0126-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system was studied. The effects of ore particle size, reaction temperature and the sum concentration of ammonium ion and ammonia on the leaching efficiency of zinc were examined. The leaching kinetics of low-grade zinc oxide ore in NH3-NH4Cl-H2O system follows the kinetic law of shrinking-core model. The results show that diffusion through the inert particle pores is the leaching kinetics rate controlling step. The calculated apparent activation energy of the process is about 7.057 kJ/mol. The leaching efficiency of zinc is 92.1% under the conditions of ore particle size of 69 mu m, holding at 80 degrees C for 60 min, sum ammonia concentration of 7.5 mol/L, the molar ratio of ammonium to ammonia being 2:1, and the ratio (g/mL) of solid to liquid being 1:10.

引用

页码：679 / 683

页数：5

共 15 条

[1] Kinetics of sulfuric acid leaching of low-grade zinc silicate ore [J].

Abdel-Aal, EA .

HYDROMETALLURGY, 2000, 55 (03) :247-254

[2]

Ekmekyapar A, 2003, CHEM BIOCHEM ENG Q, V17, P261

[3] Concentrating Ge in zinc hydrometallurgical process with hot acid leaching-halotrichite method [J].

He, J ;

Tang, MT ;

Lu, JL ;

Liu, ZQ ;

Yang, SH ;

Yao, WY .

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY, 2003, 10 (04) :307-312

[4]

IGINIO C, 1983, HYDROMETALLURGY, V10, P61

[5] Dissolution kinetics of smithsonite ore in ammonium chloride solution [J].

Ju, SH ;

Tang, MT ;

Yang, SH ;

Li, YN .

HYDROMETALLURGY, 2005, 80 (1-2) :67-74

[6] LEACHING KINETICS OF MALACHITE IN AMMONIA SOLUTIONS [J].

KUNKUL, A ;

KOCAKERIM, MM ;

YAPICI, S ;

DEMIRBAG, A .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1994, 41 (3-4) :167-182

[7] THE CENIM LNETI PROCESS - A NEW PROCESS FOR THE HYDROMETALLURGICAL TREATMENT OF COMPLEX SULFIDES IN AMMONIUM-CHLORIDE SOLUTIONS [J].

LIMPO, JL ;

FIGUEIREDO, JM ;

AMER, S ;

LUIS, A .

HYDROMETALLURGY, 1992, 28 (02) :149-161

[8] SOLUBILITY OF ZINC-CHLORIDE IN AMMONIACAL AMMONIUM-CHLORIDE SOLUTIONS [J].

LIMPO, JL ;

LUIS, A .

HYDROMETALLURGY, 1993, 32 (02) :247-260

[9]

LIU San-jun, 2005, HYDROMETALLURGY CHIN, V24, P23

[10] Kinetics of nickel leaching from spent catalyst in sulphuric acid solution [J].

Mulak, W ;

Miazga, B ;

Szymczycha, A .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2005, 77 (04) :231-235

← 1 2 →