Separation of silica from bauxite via froth flotation

被引：38

作者：

Massola, C. P. ^{[1
]}

Chaves, A. P. ^{[1
]}

Lima, J. R. B. ^{[1
]}

Andrade, C. F. ^{[2
]}

机构：

[1] Univ Sao Paulo, Dept Min & Petr Engn, Escola Politecn, BR-05508900 Sao Paulo, Brazil

[2] Companhia Brasileira Aluminio, Mirai Dept, BR-36790000 Mirai, MG, Brazil

来源：

MINERALS ENGINEERING | 2009年 / 22卷 / 04期

关键词：

Froth flotation; Non-ferrous metallic ores; Tailings; REVERSE FLOTATION; DIASPORIC-BAUXITE; ORES;

D O I：

10.1016/j.mineng.2008.09.001

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite concentrate. Tailings from an industrial plant have undergone attrition scrubbing and desliming; the quartz silica contained in the tailings has undergone flotation. Starch was used as a depressant, and ether-amine as the cationic collector. Optimum pH is around 10.0. In pilot plant scale, a metallurgical-grade concentrate was obtained by assaying 42.3% available alumina with an alumina/insoluble silica mass ratio of 11.1. It contained the gibbsite and the iron and titanium bearing minerals. The concentrate was further upgraded by magnetic separation, leading to 54.0% available alumina, with an alumina/insoluble silica mass ratio of 12.6 at an overall available alumina recovery of 69.3% in the final concentrate (non-magnetic product). (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：315 / 318

页数：4

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