PILOT SCALE CARBONIZATION STUDIES ON POLISH BELLVIEW COALS FOR METALLURGICAL COKEMAKING

The pilot scale carbonization of the normally charged bituminous Polish Bellview coal blends was conducted in a 250kg capacity coke oven with a bulk density of 800kg/m 3 , flue temperature of 1250 ° C and coking time of 18 to 20 hours. The micum drum test conducted on Bellview A and B cokes gave M10 abrasion resistance of 11.40% and 15.40% and M40 resistance to fragmentation of 77.80% and 70.80% for Bellview coke A and B, respectively. The results of this study showed that Bellview A coal blend is of a higher bituminous grade than Bellview blend B, though its micum indices do not meet the specification of 9% (maximum) M10 and 78% (minimum) M40 for blast furnace ironmaking at the Nigerian Ajaokuta steel plant. It is however expected that the small deviations of +2.4% and -0.2%, in the M10 and M40 of Bellview B coke may be eliminated during industrial scale cokemaking under a higher static load and the application of coking improvement techniques such as pre-heating and stamp charging .