Investigation of Coal Tar Pitch Binder for the Production of Formed Coal Briquettes for COREX from High Volatile Coal Powder

Lump coal with high volatility is used for providing heat and reductive gas, and ensuring permeability in CORER. However, it is apt to be pulverized in transport and storage process. Therefore, comprehensive utilization of the pulverized coal to produce coal briquettes with appropriate binders is significant, among which the molasses binder cannot meet the technological requirements. In this paper, coal tar pitch binder and BJ additive were used in briquetting and carbonizing process of coal powder. The results showed that BJ effectively activated cold state cohesiveness of the pitch and make it bond the coke particles to a firm briquette at room temperature .Carbonizations of coal and coal tar pitch achieved obvious constriction and fond a carbonized skeleton. The drop resistance of wet briquettes leached over 50 times/1meter. When cured at 100 degrees C for 1 h under nitrogen atmosphere. the compressive strength of carbonized briquettes came to 6.43 Mpa.