高压气流床气化炉反应室膜式壁耐火材料的烧损和排渣不畅时常发生。耐火材料与灰的烧结温度、渣流变特性和反应室温度是相互制约的。由于碳的转化率、转化速率和膜式壁耐火材料对温度的要求，灰渣的流动温度过高或过低都不利于挂渣和排渣，因此熔渣灰熔点的调控十分重要。由于压力对气体组分摩尔浓度的影响，进而影响气体与矿物的反应和灰的烧结温度与流动温度，常压下的试验结果已无法满足指导气化炉运行的要求。拟采用4 MPa高压和1500°C高温管式反应炉，辅以CCD图像采集和红外测温系统，主要研究：还原性气氛下覆盖高中低不同灰熔点的灰渣的烧结温度、流动温度以及不同配比的助溶剂对灰熔融特性的影响规律；与常压下的试验结果对比研究，探索压力对灰烧结温度和流变特性的影响规律；建立加压还原性气氛条件下灰的烧结温度、临界温度和粘度与矿物组分间的经验关系。为工业加压气化炉灰渣流变特性的准确调控，可靠地实现挂渣和排渣奠定理论基础。

Refractory losses and slagging are often observed on the membrane wall of the reaction chamber in pressurized entrained-flow gasifiers. The refractory matter, the ash sintering temperature, the rheology characteristics of molten slag and chamber temperature are interacted on each other. Considering the effect of temperature on carbon conversion, reaction rate and refractory materials of the membrane wall , the ash flow temperature should be controlled in a reasonable range to ensure a continuous flow of the slag, so the regulatory mechanisms of molten slag fusion temperature is very important. The results based on the atmospheric conditions are unable to meet the requirements of the industrial gasifier operating, for the effect of pressure on the mineral reaction can not be ignored, specially on the sintering and flow temperature . In this project, we used a high pressure (4 MPa) and high temperature (1500°C) tube furnace with a CCD image capture as well as an infrared temperature measurement system, focusing on : The sintering temperatures and flow temperatures of different kinds of ashes under reducing conditions, and the effect of different ratios of fluxing agents on the ash fusibility; Investigating on the effect of pressure on sintering temperature and rheology characteristics of the ash, by comparing the results of atmospheric experiments with high-pressure experiments; Building the equations of sintering temperature, critical temperature and viscosity with ash compositons under high-pressure reducing conditions. To provide reliable experimental data for controlling the rheology characteristics of molten slag in pressurized industrial gasifier. This work lays a theoretical foundation for accurately controlling the rheology characteristics of slag to ensure continuous slag flow in industrial pressurized gasifiers.