The American Buchanan coking coal has advantage of low content in ash and sulfur,which can partially replace BHP coking coal and domestic coal and help reduce coal blending cost.However,its MBI and MCI are on the high side,this blending must be adjusted according to actual blending composition and resources condition.Based on the experience,the ratio of Buchanan coking coal to be blended is supposed to be 5%~7%,it would be beneficial to improving coke quality in an economical coal blending manner.Due to diversified coal blending structure with various kinds of coke quality in cokemaking,the optimum option shall be gradually defined according to actual situation.