Resumo

LI, L.; LU, X.; QIU, J.  e  LIU, D.. Effect of microemulsified collector on froth flotation of coal. J. S. Afr. Inst. Min. Metall. [online]. 2013, vol.113, n.11, pp.877-880. ISSN 2411-9717.

The performance of microemulsified diesel and conventional diesel collectors in coal flotation was compared by flotation indicators, including combustible recovery, ash content of the clean coal, and the flotation index. An efficient separation with lower dosage was obtained using the microemulsified diesel collector. Under optimum separation conditions, the microemulsion consumption was 100 g/t less compared with diesel. The saving in diesel consumption using the microemulsion reached about 70%, disregarding the consumption of the surfactant and cosurfactant. Frothing tests showed that the frother dosage was decreased by using the microemulsion collector, because of the surfactant and cosurfactant added during preparation. The microemulsified diesel collector is superior to the conventional diesel collector in terms of diesel consumption and separation efficiency, but the selectivity requires further improvement.

Palavras-chave : froth flotation; microemulsified collector; coal.

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