Material composition and microstructure of ceramic glass й hearth of blast furnace No. 6 of JSC EVRAZ NTMK after service. Refractory microstructure after service

NOVYE OGNEUPORY (NEW REFRACTORIES) Pub Date : 2023-05-31 DOI:10.17073/1683-4518-2023-1-3-7

V. Perepelitsyn, K. Zemlyanoi, K. V. Mironov, A. A. Forshev, F. P. Nikolaev, D. V. Sushnikov

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Abstract

The results of a comprehensive study of the material microstructure of refractory samples after service in the furnace of a blast furnace with a useful volume of 2200 m3 for 14 years are presented. Structural and genetic analysis established a characteristic sequence of processes of degeneration and wear of the ceramic furnace stack, including 6 stages: the formation of micro-and macro-cracks; condensation of vaporous zinc; zinc oxidation with the formation of fire-resistant ZnO zincite and the deposition of carbon black by the; chemical interaction of zinkite with mullite and corundum to form ZnAl2O4 ganite and 2ZnO·SiO2 willemite; partial oxidation of silicon carbide with the release of silica glass SiO2, eutectic melt of complex composition, and wellimite. Due to intensive accumulation of capillary pores, infiltration of the slag melt in the volume of refractories does not occur. Wear of refractories in the furnace has a complex, mainly thermochemical mechanism and a low speed due to the formation of a garnish containing refractory compounds. Ill. 5. Ref. 14.

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JSC EVRAZ NTMK 6号高炉陶瓷玻璃炉底的材料组成和显微结构。使用后耐火材料微观结构

本文介绍了某实用容积为2200m3的高炉炉内使用14年后耐火材料试样材料微观结构的综合研究结果。结构和成因分析建立了陶瓷炉堆退化磨损的特征序列，包括6个阶段:微观和宏观裂纹形成;汽化锌的冷凝;锌经氧化生成耐火氧化锌并沉积炭黑;锌锌矿与莫来石和刚玉的化学反应生成ZnAl2O4铝云母和2ZnO·SiO2铝云母碳化硅部分氧化，释放出二氧化硅玻璃中的SiO2，共晶熔体的复杂成分，以及碳化硅。由于毛细孔隙的密集积聚，炉渣不会渗入耐火材料的体积中。耐火材料在炉内的磨损具有复杂的，主要是热化学机理，并且由于形成含有耐火化合物的装饰而速度较慢。生病了。5。Ref。14。

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