2000 Volume 86 Issue 11 Pages 733-740
Experimental and theoretical studies were made to clarify the mechanism of the coke size degradation inside raceway and following results were obtained.
(1) The mode of the coke breakage inside raceway was surface breakage and the fine generation rate could be estimated as the ratio of the impact energy on coke inside raceway and the fine generation energy per unit mass.
(2) The impact energy charged on coke inside raceway could be calculated as the kinetic energy transfered from the blast to the coke particles through the hydrodynamic interaction and the fine generation energy could be estimated through drum tests as the ratio of the energy charged on coke in the drum to the amount of fine generated.
(3) A mathematical model was developed with the help of the population balance theory usually used for comminution processes in the field of powder technology, which could predict not only the fine generation rate but also the coke size distribution inside raceway.
