China has classified fat coal (including gas-fat coal),primary coking coal (including 1/3 coking coal) and lean coal as “special and scarce coal”.The compatibility of different kinds of low-quality “special and scarce coal” is studied.By blending with appropriate amount of these coals,i.e.under the condition of the proportion of high-quality “special and scarce” coking coal and fat coal reduced down to 3%,and no coking coal with high metamorphic degree,high strength metallurgical coke can be produced.

"> “Special and scarce coal”, Coal blending, Cokemaking, Coke quality