Recovering coal fines

Details Recovering coal fines Recovering coal fines

1987-10-16

1989-08-22

Schor, Kenneth M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 5, 252 61, B03D 102

Patent

active

048593184

ABSTRACT:
Coal fines are recovered from an aqueous slurry which also contains shale as suspended fine solids by adding to the slurry a hydrophobic polymer such as a polybutadiene or a polyvinylether in a liquid organic carrier such as gas oil, diesel oil or kerosene, agitating the resulting mixture, introducing gas such as air into the mixture to form bubbles whereby flocs of coal fines formed are caused to float, and discarding the underlying slurry containing shale. To aid solution of the polymer a co-solvent, such as an aromatic solvent or a paraffinic solvent, compatible with the carrier may be used. The method is preferably carried out as a froth flotation in a froth flotation cell using a conventional frother such as methyl isobutyl carbinol or a mixture of polypropylene glycol ethers in addition to the polymer and carrier.

REFERENCES:
patent: 4126426 (1978-11-01), Vershuur
patent: 4248697 (1981-02-01), Halvorsen
patent: 4270926 (1981-06-01), Burk, Jr.
patent: 4304573 (1981-12-01), Burgess et al.
patent: 4326855 (1982-04-01), Cottell
patent: 4340467 (1982-07-01), Wang
patent: 4415337 (1983-11-01), Kuha
patent: 4437861 (1984-03-01), Ishizuka et al.
patent: 4448585 (1984-05-01), Yoo
patent: 4466887 (1984-08-01), Gross
patent: 4526680 (1985-07-01), Owen
patent: 4532032 (1985-07-01), Ng et al.
patent: 4564369 (1986-01-01), Burgess
patent: 4589980 (1986-05-01), Keys
patent: 4618414 (1986-10-01), Hartan et al.
"Condensed Chemical Dictionary" p. 916, 6th Edition Rhenhold Publ. .COPYRGT.1961 Edited by Arthur & Eliz. Rose.
"Separation of Ultrafine Pyrite from High Sulfur Coal by Selective Disperson and Flocculation" by Attia-Fossil Fuels Utilization.
Brookes, G. F. et al, "The Selective Flocculation of Coal/Shale Mixtures Using Commercial . . . " XIV International Mineral Processing Center, Oct. 17-23 1982, Toronto, Canada, VII-7.1-VII--7.16.

Affiliated with

Also associated with

Rating

Recovering coal fines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recovering coal fines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovering coal fines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2416289