Pyrite depressants useful in the separation of pyrite from coal
A process is described for the depression of the flotation of inorganic sulfur-containing compounds in coal flotation which comprises subjecting raw coal, which contains inorganic sulfur-containing compounds and has undergone sufficient size reduction so that the majority of the coal particles and particles of the inorganic sulfur-containing compounds exist as physically distinct particles or as particles in a loose agglomeration and is in the form of an aqueous slurry, to a frothy flotation process in the presence of an amount of a polymeric acid or a salt thereof having an average molecular weight of less than about 40,000, which contains pendant anionic moieties, effective to depress the flotation of the inorganic sulfur-containing compounds.
- Assignee:
- Dow Chemical Co., Midland, MI
- Patent Number(s):
- US 4830740
- OSTI ID:
- 5840710
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
CHALCOGENIDES
CHEMICAL REACTIONS
COAL FINES
COAL PREPARATION
COMMINUTION
DESULFURIZATION
FLOTATION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON COMPOUNDS
IRON SULFIDES
MINERALS
POLYMERS
PYRITE
REMOVAL
SEPARATION PROCESSES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS