Separation of silica from bauxite via froth flotation
Contribuinte(s) |
Universidade de São Paulo |
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Data(s) |
18/10/2012
18/10/2012
2009
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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 |
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 |