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Title: Coal beneficiation by gas agglomeration

Abstract

Coal beneficiation is achieved by suspending coal fines in a colloidal suspension of microscopic gas bubbles in water under atmospheric conditions to form small agglomerates of the fines adhered by the gas bubbles. The agglomerates are separated, recovered and resuspended in water. Thereafter, the pressure on the suspension is increased above atmospheric to deagglomerate, since the gas bubbles are then re-dissolved in the water. During the deagglomeration step, the mineral matter is dispersed, and when the pressure is released, the coal portion of the deagglomerated gas-saturated water mixture reagglomerates, with the small bubbles now coming out of the solution. The reagglomerate can then be separated to provide purified coal fines without the mineral matter.

Inventors:
;
Publication Date:
Research Org.:
United States Of America, Department Of Energy
Sponsoring Org.:
USDOE
OSTI Identifier:
1174531
Patent Number(s):
6,632,258
Assignee:
United States Of America, Department Of Energy OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT

Citation Formats

Wheelock, Thomas D., and Meiyu, Shen. Coal beneficiation by gas agglomeration. United States: N. p., 2003. Web.
Wheelock, Thomas D., & Meiyu, Shen. Coal beneficiation by gas agglomeration. United States.
Wheelock, Thomas D., and Meiyu, Shen. Tue . "Coal beneficiation by gas agglomeration". United States. doi:. https://www.osti.gov/servlets/purl/1174531.
@article{osti_1174531,
title = {Coal beneficiation by gas agglomeration},
author = {Wheelock, Thomas D. and Meiyu, Shen},
abstractNote = {Coal beneficiation is achieved by suspending coal fines in a colloidal suspension of microscopic gas bubbles in water under atmospheric conditions to form small agglomerates of the fines adhered by the gas bubbles. The agglomerates are separated, recovered and resuspended in water. Thereafter, the pressure on the suspension is increased above atmospheric to deagglomerate, since the gas bubbles are then re-dissolved in the water. During the deagglomeration step, the mineral matter is dispersed, and when the pressure is released, the coal portion of the deagglomerated gas-saturated water mixture reagglomerates, with the small bubbles now coming out of the solution. The reagglomerate can then be separated to provide purified coal fines without the mineral matter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 14 00:00:00 EDT 2003},
month = {Tue Oct 14 00:00:00 EDT 2003}
}

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