Chemical conditioning of fine coal for improved flotation and pyrite rejection

Patent · Tue Apr 16 00:00:00 EDT 1991

OSTI ID:5014676

Miller, J D; Ye, Y

This patent describes a method for separating ash and sulfur contaminants from feed coal in a flotation process. It comprises grinding the feed coal to a particulate size; forming a slurry of the ground coal with water; mixing the slurry of coal with at least one compound selected from the group consisting of inorganic peroxy compounds, unorganic peroxides and inorganic superoxides in the absence of polymerization, the at least one compound being present in an amount sufficient to depress the sulfur and ash contaminants; the steps being followed by the froth flotation of the coal wherein cleaned coal is collected with froth and sulfur and ash contaminants report to underflow.

• Assignee: NOV; NOV-91-023140; EDB-91-157794
• Patent Number(s): US 5008006; A
• Application Number: PPN: US 7-316081
• OSTI ID: 5014676
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
CHEMICAL REACTIONS
COAL FINES
COAL PREPARATION
COMMINUTION
DEASHING
DESULFURIZATION
DISPERSIONS
FLOTATION
FUEL SLURRIES
FUELS
GRINDING
MACHINING
MINERALS
MIXTURES
OXYGEN COMPOUNDS
PEROXIDES
POLYMERIZATION
PYRITE
SEPARATION PROCESSES
SLURRIES
SULFIDE MINERALS
SUSPENSIONS