Three coal sorts with substantially different sulfer content have been mixedly blended

and the ash samples of said coal sorts being analysed at 815 ℃

900 ℃

and 1 000 ℃ respectively by using Coulometric Titration Method

and the corresponding sulfer-retention rate being obtained.Result of measurement shows that the sulfer-retention rate of blended coals is greatly affected by the temperature and other factors

having no additivity.The influence of(Ca+Mg)/S molar ratio upon the sulfer-retention rate reduces with the temperature increase

at a lower temperature(815 ℃)

coal-bending can enhance the sulfer-retention rate of the coal proper.