Coal enhancement process and equipment

Classifying – separating – and assorting solids – With heat treatment

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

209172, 203 96, B03B 100

Patent

active

045796505

ABSTRACT:
A process for enhancing coal by removing the gangue (rock, shale, iron pyrites and the like) associated with the mined coal as it comes from the crushers before further treatment. The process described slurries the crushed run of the mine (ROM) coal with a heavy medium, such as perchloroethylene, for a short period of time at ambient or below temperatures, (i.e. slurry times of 5-30 minutes and temperatures of 90.degree. C. to below -10.degree. C.); thereafter allowing, in a substantially quiescent environment, the solids to settle or float as their inherent densities are greater or lesser respectively than the density of the heavy medium. After settling the float solids (mostly coal of lower sulfur and ash content) are separated from the heavy medium as one stream and the sink solids (mostly the gangue) as a second stream. These solids are each washed with hot (90.degree. C.-100.degree. C.) water and the vapor azeotrope which forms from the water and heavy medium mixture (azeotrope) removed. The now water wet solids are separated from the body of hot water and sent for further processing or loading. The solids, both the coal and the gangue, have a heavy medium content of less than about 400 parts heavy medium per million parts solids.

REFERENCES:
patent: 3347370 (1967-10-01), Rampacek
patent: 4173530 (1979-11-01), Smith et al.
patent: 4198289 (1980-04-01), Elliott et al.
patent: 4324560 (1982-04-01), Fenseca

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Coal enhancement process and equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-1083392

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.