Refractories in Metallurgical Industry

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Introduction of Refractory in Steel Industry

The metallurgical industry is the highest application proportion of the refractory materials, approximately 70% in the entire application. The metallurgical industry mainly includes two categories, black metallurgical industry that is steel industry and nonferrous metallurgical industry. Steel industry is the most important application of refractory materials. It’s mainly applied in the blast furnace construction and maintenance. Refractory material is a kind of inorganic non-metallic materials with a fire resistance, which can resist temperature fluctuations and slag erosion to a certain extent, and can withstand high-temperature loads. Therefore refractory material is widely used in the construction and maintenance of blast furnace in steel industry. The refractory materials used in blast furnace mainly include high alumina brick, fireclay brick and corundum brick.

AGRM is one of the most professional suppliers of refractory material, producing and marketing various refractory materials. Our refractory material products are widely used across various industries, including metallurgical, petrochemical, construction material, etc. And our company has the quality team to ensure that the product meets client requirement. Our products have been exported to many countries such as America, Canada, Britain and some other countries and regions.

refractory in metallurgical industry
refractory in metallurgical industry

Refractories for Blast Furnace

Introduction of Refractories for Blast Furnace

The sealed blast furnace is the main equipment for steel industry. There are many advantages of blast furnace, such as simple processing technology,  large production volume, high production efficiency, and lower energy consumption. And it is made of refractory material and built into a vertical structure cylindrical. because the high temperature and complex physical and chemical reactions occurring in the smelting process of the blast furnace, the furnace lining is easy to be corroded and damaged. Therefore, refractory materials are mainly used for lining blast furnaces to form the blast furnace workspace. The Main Body of blast furnace is divided into five parts from top to bottom, throat, shaft, waist, bosh, and hearth. Different parts of the blast furnace use different types of refractory materials.

refractory in metallurgical industry

The damage mechanism of brick lining in each part of the blast furnace is different. In order to prevent local brick lining from being damaged first and shorten the blast furnace life. it is necessary to choose different refractory brick based on factors such as damage, cooling, and blast furnace operation.

refractory in metallurgical industry

Furnace Throat, Upper Shaft of Furnace

refractory in metallurgical industry

We should protect furnace throat with cast iron or cast steel protective plates in the actual application due to the impact of falling furnace materials. The furnace throat is damaged due to the following reasons, The impact and wear of the furnace material on the lining when it drop along the furnace. Erosion of alkali metals, zinc vapor, and deposited carbon. The erosion of high-speed gas with a large amount of dust during the rising process. The upper and middle temperatures are relatively low (400-800 ℃), without slag formation and slag corrosion hazards. The temperature in this section is relatively low, and it needs refractory materials with good mechanical strength and low porosity, therefore, clay bricks and high alumina bricks are used in this section.

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Furnace Belly, Lower Shaft of the Furnace

This section is the root of the blast furnace soft melt zone with the high temperature. Refractory materials are affected by severe temperature fluctuations, erosion of alkali metals and zinc, erosion of high-temperature gas flow, wear and tear of furnace materials. And it needs refractory materials with good thermal shock stability, high temperature resistance and thermal conductivity. therefore, clay bricks, high alumina bricks and corundum bricks are used in this section.

Furnace Bosh

Furnace bosh is connected to the hearth and belly. The temperature in this area is higher, refractory materials are affected by severe heat radiation, slag erosion, invasion of alkali metals and the erosion of top-down melt and bottom-up hot airflow. Therefore, the belly position of the blast furnace has always been the section with the shortest service life of the blast furnace. Therefore, the refractory materials in this area should have high resistance to erosion and erosion, as well as a certain degree of thermal shock resistance. therefore, clay bricks, high Mullite bricks, corundum bricks and alumina-carbon brick are used in this section.

Therefore, you should select a suitable refractory material based on your respective furnace conditions. AGRM is one of the most professional suppliers of refractory material, producing and marketing a range of refractory materials with high quality. We sincerely seek reliable cooperators abroad. Welcome to contact us.

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