Abstract:

The study on co-carbonization of coal tar pitch and lean coal with different blending ratios was conducted. The study showed that interaction of co-carbonization of coal tar pitch and lean coal was the coaction of physical bond and chemical interaction, in which the bond state of coke interface was improved by physical bond, and coal tar pitch varied the carbonization behavior of lean coal through chemical interaction with the increase of the blending ratio of coal tar pitch, the caking property of coal blend was greatly improved, OTI  value of coke was increased, while ISO value was reduced. Coal tar pitch reduced coke reactivity and increased coke strength after reaction by means of increasing coke optical anisotropy.