Method of preparing coals for coking
AssigneeKoppers Company, Inc.
InventorsMichael Perch, Alex Peterson, Jr.
Life of this patent
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Abstract
A method of preparing coals for coking in a conventional coke oven includes agglomerating the loose coal, in combination with a binder, into flakes, mixing the flakes with non-agglomerated coal, and charging the mixture into the coke oven in the conventional manner. The method provides for the utilization in a conventional coke oven, of coals that are marginal in coking quality, greater bulk densities of the coal as charged into a conventional coke oven, acceptable shatter resistance and physical stability of the coke produced, and acceptable carbonization pressure on the coke oven walls.
Claims10
A method of utilizing blends of marginal coking quality coals in coking operations to produce acceptable quality coke therefrom without increasing coke oven wall pressure beyond acceptable limits, comprising:
- (a) blending low to medium volatile content coal with high volatile content coal both of marginal coking quality, to form a coal blend, said blend being composed of a range of 10% to 40% low to medium volatile content coal blended with a range of 90% to 60% high volatile content coal, by weight;
- (b) combining a portion of said coal blend with a coal-tar based emulsion binder in such manner that said portion of said coal blend is throughly wetted by said binder, to form a combination thereof;
- (c) compacting said combination of said portion of said coal blend and said binder in a roll press, utilizing smooth rolls, at a pressure sufficient to produce flakes;
- (d) adding said flakes to the other portion of said coal blend in a sufficient amount that said flakes range between about 1% and 50% by weight of the mixture thereby resulting;
- (e) charging a horizontal coke oven with said mixture thereby resulting;
- and
- (f) coking said mixture resulting therefrom, in a conventional coke oven.
Dependencies are inferred from the claim text.