Importance of roasted sulphide concentrates characterization in the hydrometallurgical extraction of zinc

被引：70

作者：

Balarini, Julio Cezar ^{[1
]}

Polli, Ludmila de Oliveira ^{[1
]}

Santos Miranda, Tania Lucia ^{[1
]}

Zica de Castro, Roberto Machado ^{[1
]}

Salum, Adriane ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Engn Quim, Escola Engn, BR-30160030 Belo Horizonte, MG, Brazil

来源：

MINERALS ENGINEERING | 2008年 / 21卷 / 01期

关键词：

sulphide ores; roasting; particle morphology; ore mineralogy; industrial minerals;

D O I：

10.1016/j.mineng.2007.10.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

The production of electrolytic zinc front sulphide ores consists mainly of four stages: roasting, acid leaching, purification and electrolysis. The roasting step plays an important role in zinc extraction due to the transformation from sulphide to oxide structure which provides more reactivity in presence of acid solutions. Incomplete particle roasting and presence of highly stable zinc ferrite (ZnFe2O4) formed in the pyrometallurgical step are the two major obstacles in the hydrometallurgical extraction of zinc. The objective of this study is to detect problems observed in an industrial electrolytic zinc circuit. For this purpose, X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF) and scanning electron microscopy (SEM/EDS) techniques were used to characterize sulphide and roasted concentrate samples. Microscopic investigations of cross-sectional particles revealed incomplete roasting in some particle sizes and the presence of ferrite clusters inside the roasted ores. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：100 / 110

页数：11

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