Effect of Coke Breeze on Fissure Formation of Coke

摘要

It is known that mixing the particle of inert material such as coke breeze to blending coal increases the mean size of lump coke. The size of lump coke is changed by the fissure formation, and it is assumed that the shape of lump coke is also changed by this mechanism. Therefore, the fissure formaiton of coke was investigated using the Gaudin-Meloy-Harris size distribution function. The coke blended with the coke breeze had larger grain size compared to the coke without mix of the coke breeze. In addition, the α value, which is the characteristic value of the Gaudin-Meloy-Harris size distribution function, reduced, suggesting that the shape of lump coke after breaking may be distorted. Therefore, as a result of analyzing coke fissures, it became clear that a change occurred in the fissure formation of the coke. The simulation results showed that the voidage of the coke packed layer was increased by increasing the coke grain size or distorting the shape of lump coke. It suggests that the coke produced from coal with coke breeze may increase the voids in the blast furnace.