Coal treating process
United States Patent 2970689

Inventors:
Chang, Melvin C.
John, Dasher
Publication Date:
02/07/1961
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Assignee:
CRUCIBLE STEEL CO AMERICA
Primary Class:
209/155
Other Classes:
209/729, 209/164
International Classes:
B03B9/00
US Patent References:
2596407Concentration of nonmetallic minerals by flotation
2668617Production of phosphate furnace feed
2754968Treatment of liquid materials in a hydrocyclone
2831574Beneficiation of low grade magnesite ores
2846068Concentration of potash ores containing sylvite