Process for modifying the properties of a swelling coal, an installation for carrying out the process and a chamber for treatment of coal by fluidization and crushing
AssigneeCharbonnages de France
InventorsSerge L. J. E. Delessard, Roger M. Puff, Jean-Claude Kita
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Abstract
The present invention relates to a process for modifying the properties of a swelling coal, to an installation for carrying out the process and to a chamber for treatment by fluidization and crushing. A percussion-type crusher is installed in a fluidization chamber at about 1 meter above the zone of connection between a duct for conveying coal by pneumatic transport and the chamber. A combustion chamber produces gases for transport and fluidization, having an oxygen content of at least 10%.
Claims6
Process for modifying by mild oxidation, the swelling properties of a swelling coal, in a chamber containing a fluidized bed supplied at its base with combustion gases having an oxygen content greater than 10% and with fines of coal to be treated, said chamber having at its top part a duct for removal of the treated fines and having crushing means located within the chamber comprising the steps of,
- (a) introducing the fines to be treated into the chamber, said fines having a greater particle size than the treated fines,
- (b) crushing said fines in said fluidized bed wherein the temperature of the combustion gases is regulated to a value of between 500.degree. C. and 800.degree. C., and the temperature within the fluidized bed is regulated between 300.degree. C. and 360.degree. C.
Dependencies are inferred from the claim text.