Fuel and related compositions – Consolidated solids – Consolidation process using specified condition or technique
Patent
1987-10-06
1989-07-11
Garvin, Patrick P.
Fuel and related compositions
Consolidated solids
Consolidation process using specified condition or technique
44599, 44 12, 44550, C10L 508
Patent
active
048468495
ABSTRACT:
Fine-grained substances which do not soften below 800.degree. C., such as oil coke, coking duff, pitch coke and/or fine-grained coal with less than 14% volatile constituents, sand, ores, metal oxides, metals or mixtures of such substances, are introduced in at least two places into a carrier gas stream and are thermally heated to 550-650.degree. C. in the solid discharge of a first cyclone. Then the same carrier gas stream heats coking coal amounting to 18-38% of the intended briquettable product material to 200-400.degree. C. in the solid discharge of a second cyclone. The two solid flows are mixed and treated, producing the briquettable material at 500.+-.50.degree. C. The carrier gas stream is produced by the combustion of liquid and/or gaseous fuels with an excess air factor of 2 or more. Thermally inert, low-ash solid fuels, such as oil coke, pitch coke and/or low-ash, fine-grained, low-volatility coal, amounting to 20-40% of the briquetting material, are initially introduced. The oxygen of the excess air is reacted mainly with these initally introduced low-ash solid fuels and their volatile pyrolysis products. Then additional fine-grained, thermally inert substances are introduced into at least one position of the flue stream situated downstream, and are heated before being separated in the first cyclone, while the carrier gas is cooled to a temperature of 750.+-.75.degree. C. before the introduction of the coking coal.
REFERENCES:
patent: 764986 (1904-07-01), Bulask
patent: 2937080 (1960-05-01), Komarek et al.
patent: 4059412 (1977-11-01), Goossens et al.
patent: 4345914 (1982-08-01), Rammler
Beckmann Franz
Ferner Matthias
Wagner Armand
Fourson George R.
Garvin Patrick P.
Laborlux S.A.
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