Sintering Behavior of Various Coal Flying Slag Particles in Entrained-Bed Coal Gasifiers : 4th Report, Measurement of the Sintering Temperature of the Slag Powder Containing Char and the Sintering Temperature of Various Coal Slag

Flying slag particles have a tendency to deposit and to sinter on the exit wall of entrained bed coal gasifiers. The measurement of the sintering temperature containing char and the relation between the sintering temperature and the ash fusion temperature were examined using eighteen kinds of coal water quenched slag and char. It was found that dilatometer was very useful to measure sintering temperatur of slag powder only, and that it was not useful to measure sintering temperature of the slag powder containing char because the shrinkage of the slag powder containing carbon was not related to the sintering. The compressire strength method was useful in order to evaluate sintering behavior of the slag powder containing char. The lowest sintering temperature of tested slags measured by dilatometer was approximately 650°C, and it was found that sintering temperature was related to the JIS melting point of the slag. Sintering temperature increased with increasing the melting point of the slag.