Concentration of bauxite fines via froth flotation

Rem: Revista Escola de Minas

Renata Salles Kurusu²  Arthur Pinto Chaves¹  Christian Fonseca De Andrade¹  Claret Antônio Vidal Abreu¹ 

[1] ,University of São Paulo Escola Politécnica Department of Mining and Oil EngineeringSão Paulo SP ,Brasil

关键词: Bauxite preparation;    froth flotation;    reverse froth flotation;    Beneficiamento de bauxita;    flotação;    flotação reversa;   

DOI  :  10.1590/S0370-44672009000300003

来源: SciELO

【 摘 要 】

Companhia Brasileira de Alumínio (CBA) has bauxite processing plants at Poços de Caldas and Itamarati de Minas, and a new processing plant at Miraí that has been operating since June, 2008; all of them are in the State of Minas Gerais. The plants haveunits for the crushing, scrubbing and screening operations. The screened oversize is the concentrate or washed bauxite. At Itamarati de Minas, the fines are de-slimed and concentrated by gravity separation of the iron-titanium minerals in Reichert spirals followed by HIWMS. The tailings still contain bauxite, which can be separated by reverse froth flotation (flotation of the quartz and depression of the bauxite), using starch as a depressant and amine as a promoter; the pH must be around 10.0. The iron and titanium bearing minerals are depressed with the bauxite and an additional magnetic separation operation is necessary on the depressed bauxite. This paper describes the work performed on Itamarati de Minas samples on a bench scale at Escola Politécnica, University of S. Paulo.

【 授权许可】

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