Method for agglomerating carbonaceous fines
Carbonaceous fines, such as coke fines, bituminous coal fines, anthracite coal fines, lignite fines, coal char, lignite char, wood char and mixtures thereof, are formed into hardened, crushresistant agglomerates by preparing a moistened mixture including a major proportion of the carbonaceous fines, about 1 to about 15 weight % of a bonding agent, such as burned lime, cao, or hydrated lime, Ca(OH)/sub 2/, and about 0.25 to about 10 weight % of a siliceous material, such as silica, having available SiO/sub 2/ for reacting with the bonding agent to form silicate or hydrosilicate bonds therewith; allowing the resulting mixture to stand a time period sufficient for a substantial portion of the free internal moisture in the pores of the carbonaceous fines to migrate to the surface thereof; forming the mixture into green discrete agglomerates; drying the green agglomerates to reduce the free moisture content therein to about 5% or less; and hydrothermally hardening the green agglomerates.
- Assignee:
- Michigan Technological Univ. Board of Control
- Patent Number(s):
- US 4219519
- OSTI ID:
- 6751002
- Country of Publication:
- United States
- Language:
- English
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010800 -- Coal
Lignite
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013000* -- Coal
Lignite
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Handling
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AGGLOMERATION
ALKALINE EARTH METAL COMPOUNDS
ANTHRACITE
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHARS
COAL
COAL FINES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HARDENING
HYDROGEN COMPOUNDS
HYDROXIDES
LIGNITE
LIMESTONE
MATERIALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REMOVAL
ROCKS
SEDIMENTARY ROCKS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLID WASTES
WASTES
WATER REMOVAL
WOOD WASTES