以内蒙古3种褐煤为研究对象，通过灰熔融点测试仪、高温黏度计表征了其流动性。3种煤样的灰熔点均能满足气流床气化技术的排渣需求，高温黏度曲线显示ZN与ZL渣呈现塑性渣特性，MD渣呈现玻璃体渣特性。MD渣黏度为25 Pa·s时的温度为1 525℃，不满足气流床气化技术的排渣需求。根据化学组成，将ZN、ZL与MD煤按m（MD）：m（ZN或ZL）=1：1、1：3配煤，能够改变3种煤的黏温特性，从而使3种褐煤能够满足气流床气化技术对流动性的需求。

Three kinds of lignite produced in Inner Mongolia province,China are taken as study objects,their fluidity is characterized by ash fusion temperature (AFT) tester and a high-temperature viscometer.AFT of all three kinds of lignite can meet the requirements of entrained-flow gasifying technology on slag emission.High-temperature viscosity curves show that ZN and ZL slags have the characteristics of plastic slag,and MD slag has the characteristics of glassy slag.The viscosity of MD slag is 25 Pa·s at 1,525℃,which cannot meet with the requirements of entrained-flow gasifying.According to the chemical compositions of ZN,ZL and MD lignite,their viscosity temperature characteristics can be changed if they are blended with the ratio of m(MD):m(ZN or ZL)=1:1,1:3,thus three kinds of lignite can meet the requirements of industrial entrained-flow gasifier.