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The important role of magnesia-alumina bricks in steelmaking open hearth and electric furnace and selection guide
2024/08/14
荣盛窑炉耐火材料有限公司
Industry Information
Magnesia-alumina bricks play an important role in steelmaking open-hearth and electric furnace applications due to their excellent refractory properties and thermal stability. They are key materials for improving equipment service life and production efficiency.
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The key role of magnesia-alumina bricks in steel-making open-hearth furnaces and electric furnaces. As an important refractory material, magnesia-alumina bricks are widely used in steel-making open-hearth furnaces and electric furnaces because of their excellent fire resistance and good thermal stability. According to relevant data, the refractoriness of magnesia-alumina bricks can generally reach over 1800°C. Its high refractory performance enables it to operate stably in high-temperature conditions, effectively improving the safety and stability of equipment. During the steelmaking process, the lining materials of open-hearth and electric furnaces are subjected to harsh conditions such as high temperatures, chemical attack and mechanical wear. With its excellent thermal shock resistance and chemical stability, magnesia-alumina bricks can significantly extend the service life of the lining while reducing equipment downtime and maintenance costs. Key indicators when selecting magnesia-alumina bricks When selecting magnesia-alumina bricks, you need to focus on the following key indicators: Refractory resistance is the main indicator to measure the stability of magnesia-alumina bricks under high temperature conditions. Magnesia-alumina bricks with high refractoriness can be used in high-temperature environments for a long time without structural changes or performance degradation. Generally speaking, the fire resistance of high-quality magnesia-alumina bricks should be above 1800°C. Thermal shock resistance Thermal shock resistance refers to the resistance of magnesia-alumina bricks in rapid cooling and heating environments. Good thermal shock resistance can prevent the material from cracking or chipping when the temperature changes drastically, thereby ensuring the integrity and service life of the lining material. Chemical Stability Chemical stability involves the ability of magnesia-alumina bricks to resist chemical attack at high temperatures. During the steelmaking process, various corrosive gases and slag will be produced in the furnace, so magnesia-alumina bricks with high chemical stability can effectively resist these erosions and extend their service life. Select the appropriate type of magnesia-alumina bricks for different working conditions. Different working conditions have different requirements for magnesia-alumina bricks, so it is necessary to select the appropriate product according to the specific application environment. For example, in high-temperature and high-pressure environments, you can choose magnesia-alumina brick types with higher fire resistance and stronger thermal shock resistance; while in medium and low-temperature environments, you can choose magnesia-alumina brick types that pay more attention to chemical stability. Comprehensive consideration of various indicators and targeted selection of the most suitable magnesia-alumina brick products can maximize the use effect and cost-effectiveness. Conclusion The application of magnesia-alumina bricks in steel-making open-hearth furnaces and electric furnaces is undoubtedly of great significance. Its excellent fire resistance and thermal stability are the key to improving the service life and production efficiency of the equipment. When selecting magnesia-alumina bricks, key indicators such as refractoriness, thermal shock resistance and chemical stability should be comprehensively considered, and the most suitable product should be selected according to specific working conditions. Through the scientific and reasonable selection and use of magnesia-alumina bricks, the operating efficiency of equipment can be effectively improved, and sustainable business growth and competitive advantages can be brought to enterprises.

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