Estimation of Dilatation of Coal Blend

Abstract

With the aim of developing a model for estimating coking pressure of coal blend, the effect of coal type and carbonization conditions on gas permeability in softened coal layer was investigated. Then the reason why gas permeability becomes low when coal softens was discussed.
It turned out that it is necessary for estimating the gas permeability to estimate the specific volume of coal blend and the estimation method of the specific volume of coal blend was developed. It was found that the specific volume of coal blend at a temperature can be estimated by calculating a weighted mean value of the specific volume of component coal at the temperature and multiplying the value by an inert factor corresponding to the ratio of coal exceeding its maximum dilatation temperature.