Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1993-11-09
1995-01-10
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, 210768, 210770, B03D 102, B03D 1006, B03B 104
Patent
active
053799020
ABSTRACT:
A single dose of additive contributes to three consecutive fine coal unit operations, i.e., flotation, dewatering and reconstitution, whereby the fine coal is first combined with water in a predetermined proportion so as to formulate a slurry. The slurry is then mixed with a heavy hydrocarbon-based emulsion in a second predetermined proportion and at a first predetermined mixing speed and for a predetermined period of time. The conditioned slurry is then cleaned by a froth flotation method to form a clean coal froth and then the froth is dewatered by vacuum filtration or a centrifugation process to form reconstituted products that are dried to dust-less clumps prior to combustion.
REFERENCES:
patent: 1595731 (1926-08-01), Quigley
patent: 1678379 (1928-07-01), Chapman
patent: 2028742 (1936-01-01), Frantz
patent: 2112362 (1938-03-01), Gillson
patent: 2744626 (1956-05-01), Reerink
patent: 3361259 (1968-01-01), Von Der Gathen
patent: 3807557 (1974-04-01), Miller
patent: 4162966 (1979-07-01), Finch
patent: 4222861 (1980-09-01), Finch
patent: 4222862 (1980-09-01), Finch
patent: 4270926 (1981-06-01), Burk
patent: 4272250 (1981-06-01), Burk
patent: 4340467 (1982-07-01), Wang
patent: 4415337 (1983-11-01), Kutta
patent: 4426282 (1984-01-01), Aursholt
patent: 4466887 (1984-08-01), Gross
patent: 4476013 (1984-10-01), McCaffrey
patent: 4528107 (1985-07-01), McCaffrey
patent: 4532032 (1985-07-01), Ng
patent: 4632750 (1986-12-01), McGarry
patent: 4756823 (1988-07-01), O'Neill
patent: 4966608 (1990-10-01), Pawlak
patent: 4969928 (1990-11-01), Wen et al.
Lewis, Robert M. "Research Approach to Flotation of Strip Mine and Deep Mine Coals", Transactions of AIME, vol. 252, Jun. 1972 pp. 147-149.
Wen et al., "The Coal Reconstitution By An In Situ Hardening Process", The Inst. For Briquetting and Agglomeration (1989).
Wen et al., "A New Strategy For Fine Coal Dewatering And Reconstitution", Fluid/Particle Separation Journal (Dec. 1988).
Presentation: 9th Annual Coal Preparation, Utilization and Environmental Control Contractor Conference (Jul. 19-21, 1993).
Presentation: International Coal Conference: Toronto, Canada (Sep. 1993).
Pres. 5th International Conference: Processing and Utilization of High Sulfur Coals (Oct. 24-28, 1993).
Becher, P., "Emulsions: Theory and Practice", 2nd Ed. ACS Monographs No. 162, Reinhold, N.Y. 1965.
Champagne Kenneth J.
Gray McMahan L.
Wen Wu-Wey
Fisher Robert J.
Glenn Hugh W.
Lithgow Thomas M.
Moser William R.
The United States of America as represented by the United States
LandOfFree
Method for simultaneous use of a single additive for coal flotat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for simultaneous use of a single additive for coal flotat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for simultaneous use of a single additive for coal flotat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-845299