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:
- Issue 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. 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 = {2003},
month = {10}
}