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Title: Flotation machine and process for removing impurities from coals

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.
Inventors:
 [1];  [1];  [1];  [2];  [3]
  1. (Edmonton, CA)
  2. (Newark, CA)
  3. (Mountain View, CA)
Issue Date:
OSTI Identifier:
870820
Assignee:
Electric Power Research Institute, Inc. (Palo Alto, CA) NETL
Patent Number(s):
US 5601703
Application Number:
08/567191
Contract Number:
FG22-87PC79865
Research Org:
Electric Power Research Institute, Inc. (Palo Alto, CA)
Country of Publication:
United States
Language:
English
Subject:
flotation; machine; process; removing; impurities; coals; directed; type; combines; separate; operations; single; unit; hydraulic; separator; capable; reducing; pyrite; mineral; matter; content; coal; minerals; particles; entrained; hydrodynamic; forces; associated; conventional; machines; attachment; formation; microagglomerates; washed; separated; removing impurities; flotation machine; mineral matter; rate operation; single unit; hydraulic separator; separate operations; /209/