Abstract
Ozone conditioning can be used for the selective flotation of macroscopic fossil resin (resinite) from coal by treatment of the resin/coal suspension for an appropriate period of time prior to flotation. In this way, a significant improvement in resin separation efficiency can be achieved, but the chemistry of ozone reactions and its influence on particle behavior have not been reported. The improvement in the selective fossil resin flotation by ozone conditioning has been found to be due to (1) the improved depression of fine coal particles, which is evidenced from contact angle measurements, chemical analysis, and FTCR spectroscopic examination; and (2) the improved dispersion of the resin/coal suspension in which the coagulation between resin and coal particles in suspension was significantly reduced by ozonation as evidenced by optical microscopic observation.
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