COKE MAKING FOR BLAST FURNACE FROM HOKKAIDO COAL
1949 Volume 35 Issue 9 Pages 287-290
Details
1949 Volume 35 Issue 9 Pages 287-290
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 lather spoiled the strength, except the semi-coke ground as finely as above.
