北海道炭による高爐コークスの製造

概要

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The authors have had an examination to make high quality coke for blast furnace using the high volatile caking coal blended with our factory-made semi-coke from non-caking coal as material, both of which produced in Hokkaido. The strength of coke, thus made, is much increased when the mother coal is blended with 20∿30% of finely ground semi-coke of 0.3m/m and smaller size. Blending more than 30% rather decreases the strength sharply. The semi-coke size to be used is the smaller the better, to the limit, below 200 mesh its complexion becomes poor on the contrary. Bigger than 0.6m/m are nearly ineffective, however. Similar effect is found when coke-breeze is used in place for semi-coke. In that case the best adequate percentage of blending proved a little low, besides the effect too is some-what less. Examination, also made to the semi-coke from other source, has proved that the mere blending rather spoiled the strength, except the semi-coke ground as finely as above.
社団法人日本鉄鋼協会の論文
1949-09-25