INDIRECT METHOD FOR EVALUATING LIGNITE MOISTURE
Cracow University of Mining and Metallurgy, 30 Mickiewicza Av., 30059 Krakow, Poland. E-mail : fafara@uci.agh.edu.pl
Cracow University of Mining and Metallurgy, 30 Mickiewicza Av., 30059 Krakow, Poland
Cracow University of Mining and Metallurgy, 30 Mickiewicza Av., 30059 Krakow, Poland
Abstract
The inherent moisture of lignites is an important property in combustion of coal. The literature abounds in numerous models for assessing this property based on the known values of other properties, which are determined using standard methods. As a rule, these correlations are only valid for coals from the same deposits. Based on sixteen Polish and one Australian lignite samples, an attempt was made to create a universal regression model for predicting the inherent moisture of lignites based on ash content and depth of deposition. A non-linear asymptotic model is elaborated. Its verification shows a high geological effectiveness.