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2000•Acta Scientiarum Naturalium Universitatis SunyatseniRequires access

THE DEPRESSION OF PYRITE FLOTATION BY THIOBACILLUS FERROOXIDANS

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Abstract

The experimental studies on the microbial flotation of a pure pyrite sample using Thiobacillus ferrooxidans was conducted in the laboratory.The results indicate that Thiobacillus ferrooxidans has strong depression effect on the flotation of pyrite.Thiobacillus ferrooxidans can adsorb on the surface of pyrite in a very short time (a few min.),changing the surface from hydrophobic into hydrophilic and making the pyrite particles to lose their floatability.Therefore, Thiobacillus ferrooxidans is an effective microbial depressant of pyrite.It has also been pointed out that the depression of pyrite by Thiobacillus ferrooxidans is caused by the adsorption of the microbial colloids, but not by the oxidation effect.

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What this paper is about

The experimental studies on the microbial flotation of a pure pyrite sample using Thiobacillus ferrooxidans was conducted in the laboratory.The results indicate that Thiobacillus ferrooxidans has strong depression effect on the flotation of pyrite.Thiobacillus ferrooxidans can adsorb on the surface of pyrite in a very short time (a few min.),changing the surface from hydrophobic into hydrophilic and making the pyrite particles to lose their floatability.Therefore, Thiobacillus ferrooxidans is an effective microbial depressant of pyrite.It has also been pointed out that the depression of pyrite by Thiobacillus ferrooxidans is caused by the adsorption of the microbial colloids, but not by the oxidation effect.

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Available abstract

The experimental studies on the microbial flotation of a pure pyrite sample using Thiobacillus ferrooxidans was conducted in the laboratory.The results indicate that Thiobacillus ferrooxidans has strong depression effect on the flotation of pyrite.Thiobacillus ferrooxidans can adsorb on the surface of pyrite in a very short time (a few min.),changing the surface from hydrophobic into hydrophilic and making the pyrite particles to lose their floatability.Therefore, Thiobacillus ferrooxidans is an effective microbial depressant of pyrite.It has also been pointed out that the depression of pyrite by Thiobacillus ferrooxidans is caused by the adsorption of the microbial colloids, but not by the oxidation effect.

Key concepts: Pyrite, Thiobacillus ferrooxidans, Adsorption, Thiobacillus, Depressant, Chemistry, Metallurgy, Mineralogy

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