Removal of Hg, As and Se ions from gold cyanide leach solutions by dissolved air flotation

被引：31

作者：

Tessele, F

Misra, M

Rubio, J ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, PPGEM, Dept Engn Minas, Porto Alegre, RS, Brazil

[2] Univ Nevada, Dept Chem & Met Engn, Reno, NV 89557 USA

来源：

MINERALS ENGINEERING | 1998年 / 11卷 / 06期

关键词：

environmental; gold ores; froth flotation;

D O I：

10.1016/S0892-6875(98)00035-1

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The removal of Hg, As and Se ions from processing streams of gold cyanidation circuits was studied by dissolved air flotation (DAF) at laboratory scale. Two different methods were applied. The first was based on the separation by flotation of the aggregates (AF) formed between the ions and NaDTC (precipitant), LaCl(3) or FeCl(3) (coagulants) and Bufloc (a flocculant). The second was adsorptive particulate flotation (APF) using solid sorbing materials for the ions (chabazite and La(2)O(3)) and microbubbles in the solid/liquid separation stage. Results showed that removal was efficient in both cases and followed the order : (AF) >APF-chabazite>APF-La(2)O(3) Almost complete removal (98%) of the metal ions from solution was obtained. Process efficiency depended on the system solution and interfacial chemistry, aggregation phenomena and DAF operating parameters. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：535 / 543

页数：9

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