Flotation machine and process for removing impurities from coals

Title: Flotation machine and process for removing impurities from coals

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The present invention is directed to a type of flotation machine that combines three separate operations in a single unit. The flotation machine is a hydraulic separator that is capable of reducing the pyrite and other mineral matter content of a coal. When the hydraulic separator is used with a flotation system, the pyrite and certain other mineral particles that may have been entrained by hydrodynamic forces associated with conventional flotation machines and/or by the attachment forces associated with the formation of microagglomerates are washed and separated from the coal. 4 figs.

Inventors:: Szymocha, K.; Ignasiak, B.; Pawlak, W.; Kulik, C.; Lebowitz, H.E.

Issue Date:: 1995-12-05

OSTI Identifier:: 170460

Assignee:: Electric Power Research Inst., Palo Alto, CA (United States) PTO; SCA: 010300; PA: EDB-96:024512; SN: 96001517637

Patent Number(s):: US 5,472,094/A/

Application Number:: PAN: 8-131,514

Contract Number:: FG22-87PC79865

Resource Relation:: Other Information: PBD: 5 Dec 1995

Research Org:: Electric Power Research Institute

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; COAL; FLOTATION; DESULFURIZATION; DEASHING; SEPARATION EQUIPMENT; DESIGN; COAL PREPARATION; OPERATION; PERFORMANCE

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Flotation machine and process for removing impurities from coals

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The present invention is directed to a type of flotation machine that combines three separate operations in a single unit. The flotation machine is a hydraulic separator that is capable of reducing the pyrite and other mineral matter content of a coal. When the hydraulic separator is used with a flotation system, the pyrite and certain other minerals particles that may have been entrained by hydrodynamic forces associated with conventional flotation machines and/or by the attachment forces associated with the formation of microagglomerates are washed and separated from the coal. 4 figs.
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