MODIFYING OPTICAL TEXTURE OF THE COKE FROM MIIKE COAL.

Modification of the optical texture of the coke from Miike coal in powdered form, which gave, singly carbonized, an isotropic coke, was investigated by applying varying carbonization conditions, a crabonization catalyst and co-carbonization with some hydrocarbons and pitches. A rapid temperature rise was favorable to the development of a fine mosaic texture in a rather limited area of the coke. The development of anisotropic texture from fusible coal is discussed from the veiwpoint of carbonization mechanism where the mesophase formation is possibly influenced by the heating rate, the catalyst, and the co-carbonizing partners.