METHOD FOR MANUFACTURE OF BLAST FURNACE COKE FROM BLENDED COAL PREPONDERANTLY CONTAINING LOW GRADE COAL

摘要

METHOD FOR MANUFACTURE OF BLAST FURNACE COKE FROMBLENDED COAL PREPONDERANTLY CONTAINING LOW GRADE COALABSTRACT OF THE DISCLOSUREBlast furnace coke allowed to contain low grade coal ina notably higher blending ratio is manufactured by a methodwhich comprises blending not less than 60% of blended coalhaving an adjusted total moisture content of not more than4% with not more than 40% of briquettes and carbonizing theresultant mixture.The blended coal essentially consists of not less than 80%of coking coal and not more than 20% of low grade coal. Whencoking coal of a kind which has segregated the coking propertyaccording to grain size distribution is pulverized and clas-sified by sifting and the portion of fine particles is usedas mixed with the coking coal, the blending ratio of the lowgrade coal in the blended coal can be increased up to 35%.The briquettes essentially consist of not less than 10% ofcoking coal and not more than 90% of low grade coal.