The coal tar pitch powder, whose size less than 200 mesh, was prepared by cryogenic grinding technology with the high temperature coal tar pitch. The coal tar pitch was frozen at the friability temperature and then grinded with some dispersants in. The pitch powder was screened to achieve particles with size less than 200 mesh. The sodium fatty alcohol ether sulfate (AES) was the best dispersant after election. The effects of preservation time, temperature and dispersants on the stability of coal tar pitch powder were studied.
coal tar pitch, coal tar pitch powder, stability, dispersant, AES