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METHOD FOR DECIDING BLENDING AMOUNT OF ASH-FREE COAL, AND PROCESS FOR PRODUCING COKE FOR BLAST FURNACE
METHOD FOR DECIDING BLENDING AMOUNT OF ASH-FREE COAL, AND PROCESS FOR PRODUCING COKE FOR BLAST FURNACE
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机译:一种无灰煤掺量的确定方法及高炉焦炭的生产工艺
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摘要
The purpose of the present invention is to provide: an efficient method for deciding the blending amount of ash-free coal when producing a coke for blast furnaces; and a process for producing a coke for blast furnaces using said decision method. This method is for deciding the blending amount of ash-free coal obtained by solvent extraction of coal, when producing a coke for blast furnaces which comprises feed coal and the ash-free coal. The method comprises: calculating a reference value W [mass%] from the porosity index Pv [vol%] of the feed coal, the expansibility index D [vol%] of the ash-free coal, and the true specific gravity ρ of the ash-free coal using the following equation (1); and deciding the blending amount of the ash-free coal with respect to the blend coal on the basis of the reference value W. The blending amount of the ash-free coal with respect to the blend coal is preferably 0.29W-1.00W [mass%]. W=(Pv/D)×ρ×100 (1)
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