Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work
Patent
1979-03-08
1980-08-26
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
264117, 23314, C04B 1514
Patent
active
042195195
ABSTRACT:
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, crush-resistant 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.
REFERENCES:
patent: 3275724 (1966-09-01), Klingel
patent: 3634567 (1972-01-01), Yang
patent: 4102962 (1978-07-01), Matsui et al.
Arnold Donald J.
Board of Control of Michigan Technological University
Hall James R.
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