Abstract: The fluidization of coal gangue particle on cold model is tested in plexiglass of diameter 140mm and height 1344mm. The fluidization characteristic of coal gangue particle and the effect of distributor, bed thickness on fluidization quality are analyzed. The results show that the opening ratio of distributor and bed thickness do not much affect initial fluidizing characteristic of coal gangue. Two types of coal gangue particle are B particle and the initial fluidizing gas velocity are 0.16m/s and 0.14m/s. The Babu formula can predict initial fluidizing gas velocity of coal gangue. The distributor, bed thickness and particle will affect fluidization quality by different level. The suitable operation velocity is 1.5 time than initial fluidizing gas velocity.

Key words: coal gangue, fluidization characteristic, cold model, fluidization quality