Removal of sulfur from Assam coal by bacterial conditioning and froth flotation

Removal of sulfur from Assam coal by bacterial conditioning and froth flotation

Removal of sulfur from Assam coal by bacterial conditioning and froth flotation

Abstract

Reduction of sulfur by bacterial leaching from a high sulfur-bearing coal sample from Assam
was attempted. Flotation of the sample with light diesel oil could not depress the pyrite and also the
Thiobacillus ferrooxidans was found to be ineffective in leaching the sulfur from the ¯otation
concentrate. Conditioning of the same coal sample with Thiobacillus ferrooxidans was found to assist
in selectively depressing the pyrite, thereby reducing nearly 60% of the pyritic sulfur present in the
sample.

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