Removal of Pyrite in Coal Flotation

Document Type

Article

Publication Date

2-1-1992

Abstract

In most operating coal-cleaning plants, a significant amount of pyrite is recovered in the I roth during flotation of high-sulfur coal. Reducing the pyrite recovery first requires that the primary recovery mechanism should be identified, as different measures are required for reducing entrainment, locked-particle flotation, or true hydrophobic flotation. In this paper, evidence is presented wh ch suggests that hydrophobic flotation is not an important mechanism for recovery of liberated pyrile when the collector is a neutral oil, and that the bulk of the floated pyrite occurs either as a result of simple entrainment or by mechanical locking with floatable coal particles. Column flotation results are also presented which show that significant sulfur reductions can be achieved by reducing levels of entrainment. © 1992, Taylor & Francis Group, LLC. All rights reserved.

Publication Title

Mineral Processing and Extractive Metallurgy Review

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