作者：Jinxuan Zhao; Bo Zhao; Feng Xiao; Yihao Du; Wei Wu; Wei Wu

作者单位：Metallurgical Technology Institute, Central Iron and Steel Research Institute Co. Ltd., Beijing, 100081, China;Steelmaking Plant, Sichuan Desheng Group Vanadium and Titanium Co. Ltd., Leshan, 614900, China;State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co. Ltd., Luoyang, 471039, China

刊名：Ceramics International

ISSN：0272-8842

出版年：2024-10-10

卷：50

期：21

起页：44255-44267

止页：

分类号：

语种：英文

关键词：Keyword / 关键词MT翻译 Vanadium extraction converter;Magnesia-carbon bricks;Dynamic erosion;Erosion mechanism;Thermodynamic analysis

内容简介

This paper uses a rotary furnace to simulate the dynamic erosion behavior of various magnesia-carbon bricks within a vanadium extraction converter, focusing on the effects of carbon content and antioxidants on erosion. The results indicate that vanadium-rich slag primarily consists of oxide solid solutions, iron vanadium spinel, and metallic Fe. Adding aluminum and silicon powders to the bricks reduces apparent porosity, increases body density, and improves slag erosion resistance. However, an increase in carbon content (12.54 wt% to 18.59 wt%) within magnesia-carbon bricks correlates with decreased high-temperature strength, exacerbating the reaction propensity with slag and consequent structural damage. Analysis of the interface phase between magnesia-carbon bricks and vanadium slag reveals a predominance of metal phase, spinel phase, and liquid slag phase. Thermodynamic calculations suggest an initial reaction between MgO and C on the brick surface, yielding Mg vapor and CO gas, while C reacts with slag to produce Cr and V elements, leading to surface structure degradation. Subsequent slag encasement and dissolution of remaining MgO via decarburization channels further erode magnesia-carbon bricks. Cumulative erosion iterations ultimately culmi nate in performance failure of magnesia-carbon bricks.