Coal conditioning process

Details Coal conditioning process Coal conditioning process

1993-10-18

1995-04-04

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209167, 210702, 210708, 210709, 210770, 210772, 210778, B03D 1008, B03D 102, B03D 110

Patent

active

054028949

ABSTRACT:
A process for improving the efficiency of coal dewatering and deashing uses complexing agents such as sodium gluconate in alkaline solution to form soluble compounds with cations such as Al.sup.+3, Fe.sup.+3, Mg.sup.+2, and Ca.sup.+2. The formation of such compounds reduces the adsorption and/or desorbs clay slimes from the coal surface.

REFERENCES:
patent: 1944529 (1934-01-01), Schafer
patent: 4162966 (1979-07-01), Finch
patent: 4211642 (1980-07-01), Petrovich
patent: 4253944 (1981-03-01), Hefner
patent: 4278533 (1981-07-01), Hefner
patent: 4305815 (1981-12-01), Hefner
patent: 4474619 (1984-10-01), Meyer
patent: 4537599 (1985-08-01), Greenwald
patent: 4604099 (1986-08-01), Berendt
patent: 4732669 (1988-03-01), Nimerick
Brookstein et al "Foam Assisted Dewatering" Albany Int'nl Research Co. Dedham, Mass.

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