T/SXCIES 001-2021 The determination of gasification coal ash and gasification slag viscosity-temperature characteristics using continuous cooling method

Scope

Scope: This standard provides a summary of the methods for determining the viscosity-temperature characteristics of gasified coal ash and gasified slag, including materials and equipment, sample preparation, test procedures, data processing, and result reporting, as well as the precision of the method. This standard is applicable to coal used for gasification and gasified slag. Main technical content: The coal used for gasification or gasified slag samples are calcined. After the ash samples are melted in a high-temperature electric furnace to obtain pre-melted slag, the crucible containing the pre-melted slag is placed inside the furnace of a high-temperature rotary viscometer. Vacuum is drawn and air is supplied according to the test requirements. After the program temperature rises to the set maximum temperature and is maintained at a constant temperature for a period of time, the rotor is immersed in the melt. A continuous cooling measurement method is used to cool at a fixed rate and determine the viscosity value of the slag at different temperatures. The viscosity is plotted on the vertical axis and the temperature on the horizontal axis to draw a viscosity-temperature (viscosity-temperature) curve, obtaining the critical viscosity temperature of the sample and the temperature corresponding to the characteristic viscosity value.

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