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钢水温度和碳对镁铝尖晶石质耐火材料侵蚀的影响
引用本文:杜景云,马北越,聂立诚,严永亮,于景坤. 钢水温度和碳对镁铝尖晶石质耐火材料侵蚀的影响[J]. 中国冶金, 2008, 17(12)
作者姓名:杜景云  马北越  聂立诚  严永亮  于景坤
作者单位:1.东北大学材料与冶金学院,辽宁 沈阳 110004;2.鞍山钢铁集团有限公司炼钢厂,辽宁 鞍山 114000;3.宝山钢铁集团有限公司炼钢厂,上海 201900
摘    要:根据热力学分析和热态实验研究了钢水温度及其碳质量分数对镁铝尖晶石质耐火材料侵蚀的影响,并探讨了耐火材料的侵蚀机理。研究表明,提高温度将加剧钢水对耐火材料的侵蚀,随钢水中碳质量分数的增加,耐火材料的侵蚀指数先增加后减小。侵蚀机理包括:一是钢水中碳与耐火材料组分氧化镁反应化学侵蚀耐火材料;二是钢水向耐火材料内部的渗入以及低熔点物相在耐火材料颗粒界面的析出,降低了耐火材料颗粒间的结合力,加剧了钢水冲刷对耐火材料的损毁程度。

关 键 词:镁铝尖晶石;钢水;温度;碳质量分数;侵蚀

Effects of Temperature of Molten Steel and Carbon on Corrosion of Magnesia Alumina Spinel Refractory
DU Jing yun,MA Bei yue,NIE Li cheng,YAN Yong liang,YU Jing kun. Effects of Temperature of Molten Steel and Carbon on Corrosion of Magnesia Alumina Spinel Refractory[J]. China Metallurgy, 2008, 17(12)
Authors:DU Jing yun  MA Bei yue  NIE Li cheng  YAN Yong liang  YU Jing kun
Affiliation:1. School of Materials and Metallurgy, Northeastern University Shenyang 110004, Liaoning, China; 2. Steel Making Plant, Anshan Iron and Steel Co Ltd, Anshan 114000, Liaoning, China; 3. Steel Making Plant, Baoshan Iron and Steel Co Ltd, Shanghai 201900, China
Abstract:Thermodynamic analysis and hot condition experiment were used to study the effects of temperature of molten steel and mass fraction of carbon on the corrosion of magnesia alumina spinel refractory, and the corrosion mechanism was discussed. The results show that the corrosion of molten steel on the refractory could be aggravated and the corrosion index of the refractory increased and then decreased with the increasing of the mass fraction of carbon in molten steel. The corrosion mechanism included two respects, one was the chemical corrosion on the refractory surface by the reaction between carbon and magnesia, the other was the penetration of the molten steel into the refractory and the precipitation of the low melt point compounds at interface between grains of the refractory, which would weaken the combining power of grains and aggravate the broken down of the refractory caused by washing out of molten steel.
Keywords:magnesia alumina spinel;molten steel;temperature;mass fraction of carbon;corrosion
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