Iron control in zinc plant residue leach solution

被引：35

作者：

Swarnkar, SR ^{[1
]}

Gupta, BL ^{[1
]}

Sekharan, RD ^{[1
]}

机构：

[1] HINDUSTAN ZINC LTD,ZINC SMELTER,UDAIPUR 313024,INDIA

来源：

HYDROMETALLURGY | 1996年 / 42卷 / 01期

关键词：

D O I：

10.1016/0304-386X(95)00077-T

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In the hydrometallurgical production of zinc through the conventional 'roast-leach-electro-win' process, zinc ferrite is formed together with zinc oxide during roasting of zinc sulphide concentrate. This ferrite is not leached under normal conditions and separates out as residue. Zinc from this residue is recovered in high-temperature acid leaching, which yields a zinc sulphate solution containing high levels of iron. This imposes process constraints, because of high iron level, on recycling the solution to the neutral leaching stage. Investigations into the control of iron levels in residue leach solution by optimizing acidity with zinc hydroxide-gypsum cake are presented in this paper. The plant implementation of this work is also illustrated.

引用

页码：21 / 26

页数：6