Strength estimation of coke as porous material.

Abstract

Research on the coke strength has recently been carried out treating the coke as a porous material and a new progress is made in the essential evaluation of coke strength. Previous researches have, however, discussed mainly the effects of porosity and/or distribution of pores on the strength and little has been studied on the inherent strength which affects the coke strength.In this research, a sieve opening for strength index applied to the microstrength which evaluates the inherent strength was investigated. The micro-strength with a smaller sieve opening was found to be a reasonable index for the inherent strength of coke.It was confirmed that the tensile strength is estimated by porosity and micro-strength. The JIS drum strength which is usually used in industrial plant is also estimated from the porosity and the microstrength through the tensile strength. The results show that the coke strength is determined by the strength of porous material which depends on its porosity and inherent strength.