New information on the sphalerite bioleaching mechanism at low and high temperature

被引：61

作者：

Rodríguez, Y ^{[1
]}

Ballester, A ^{[1
]}

Blázquez, ML ^{[1
]}

González, F ^{[1
]}

Muñoz, JA ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Ciencia Mat & Ingn Met, E-28040 Madrid, Spain

来源：

HYDROMETALLURGY | 2003年 / 71卷 / 1-2期

关键词：

microbial attachment; bioleaching mechanism; sphalerite; sphalerite electrochemistry; iron-oxidizing microorganisms; sulphur-oxidizing microorganisms;

D O I：

10.1016/S0304-386X(03)00174-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The study of the sphalerite bioleaching mechanism showed that the oxidation state of the iron in solution is fundamental because it controls the relative rate of the oxidation reactions participating in the process. In addition, it was observed that the leaching of sphalerite is controlled by a layer of elemental sulphur formed on the surface, which controls diffusion. Microbial attachment on the pyrite component of the zinc concentrate relates directly with the leaching rate of the sphalerite due to the liberation of Fe2+ from contact bioleaching of the pyrite. Bioleaching of the sphalerite concentrate takes place via a cooperative bioleaching strategy involving contact bioleaching of the pyritic phase of the concentrate and the indirect bioleaching of the sphalerite. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：57 / 66

页数：10

共 23 条

[21] AN ELECTROCHEMICAL MODEL FOR THE LEACHING OF A SPHALERITE CONCENTRATE [J].

VERBAAN, B ;

CRUNDWELL, FK .

HYDROMETALLURGY, 1986, 16 (03) :345-359

[22] REACTION-MECHANISM FOR THE FERRIC-CHLORIDE LEACHING OF SPHALERITE [J].

WARREN, GW ;

HENEIN, H ;

JIN, ZM .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1985, 16 (04) :715-724

[23] The effect of solid surfaces upon bacterial activity [J].

Zobell, CE .

JOURNAL OF BACTERIOLOGY, 1943, 46 (01) :39-56

← 1 2 3 →