Separation of silica from bauxite via froth flotation


Autoria(s): Massola, Camila Peres; Chaves, Arthur Pinto; Lima, Jose Renato Baptista de; Andrade, Christian Fonseca de
Contribuinte(s)

Universidade de São Paulo

Data(s)

18/10/2012

18/10/2012

2009

Resumo

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.

CBA

Identificador

Minerals Engineering, Oxford, v. 22, n. 4, p. 315-318, Mar. 2009

0892-6875

http://producao.usp.br/handle/BDPI/18300

10.1016/j.mineng.2008.09.001

http://dx.doi.org/10.1016/j.mineng.2008.09.001

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

Relação

Minerals Engineering

Direitos

restrictedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #Froth flotation #Non-ferrous metallic ores #Tailings #REVERSE FLOTATION #DIASPORIC-BAUXITE #ORES #Engineering, Chemical #Mineralogy #Mining & Mineral Processing
Tipo

article

original article

publishedVersion