Abstract: Six refractories were selected for erosion investigation under simulated catalytic coal gasification atmosphere. The changes of composition, phase and refractory structure before and after the reaction were characterized by using scanning electron microscope (SEM) and energy spectrum analysis, X-ray diffraction (XRD) analysis. The results showed that corundum refractories could resist alkali corrosion better, and alkali corrosion resistance of high purity corundum was weaker than that of magnesia-alumina spinel and wollastonite under catalytic coal gasification condition. Chromium-containing refractories used in catalytic gasification process had greater safety risks. Trivalent chromium reacted with alkali metals at oxidative atmosphere and converted into toxic and leachable potassium chromate. SiC series refractories had great risks when used in oxygen-containing atmosphere of catalytic gasification process. It was not recommended to use SiC series refractories in oxygen-containing area of gasifier. The alkaline refractory - high purity magnesium oxide had good alkali corrosion resistance. There was no obvious chemical reaction occurred between refractory and alkali gasification ash under the condition of catalytic coal gasification.
毛燕东, 刘雷, 李克忠. 煤催化气化工艺中含碱灰渣对不同耐火材料的腐蚀性研究[J]. 材料导报, 2020, 34(20): 20061-20065.
MAO Yandong, LIU Lei, LI Kezhong. Corrosivity of Alkali-containing Ash Slag on Different Refractories in Catalytic Coal Gasification Process. Materials Reports, 2020, 34(20): 20061-20065.
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