Distillation: processes – thermolytic – With comminuting – Prior to charging to carbonizing zone
Patent
1975-07-24
1976-11-16
Scovronek, Joseph
Distillation: processes, thermolytic
With comminuting
Prior to charging to carbonizing zone
201 9, 201 23, 201 41, 201 42, C10B 5304
Patent
active
039922669
ABSTRACT:
Coal particles are heated and further particulized at a preheat stage employing a preheat gas. Some of the finer coal particles are puffed up by the preheating step. Most of the preheated coal particles are separated from the preheat gas, but some of the finer coal particles remain with the preheat gas. The coal particles separated from the preheat gas are oiled and eventually transported by a carrier gas through a pipeline into a coke oven. The preheat gas and the finer coal particles remaining therewith are separated from each other utilizing a wet scrubber at which the finer coal particles undergo flocculation. Oil vapor vented from the coal particles headed for the coke oven is directed to the wet scrubber to aid in the flocculating step. The flocculated coal particles are separated from the scrubber liquid in a flotation cell. The overflow from the flotation cell is filtered, and the filter cake comprising coal particles is employed as a fuel. At least some of the underflow from the flotation cell is recycled as scrubber liquid to the wet scrubber. The liquid from the filtering step is employed to precipitate, in a charging main, fine coal particles discharged with carrier gas into the charging main during charging of the coke oven.
REFERENCES:
patent: 3140241 (1964-07-01), Work et al.
patent: 3506745 (1970-04-01), Juel et al.
D. G. Marting et al., "Pipeline Charging Preheated Coal to Coke Ovens", U.N. Economic Commission for Europe Symposium on Developments in European and World Markets for Coking Coal and Coke, Rome, Italy (Mar. 27, 1973).
Aktay Ali I.
Holowaty Michael O.
Inland Steel Company
Scovronek Joseph
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