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Greatly promising snap-in composite electric furnace top prefabricated parts

Electric arc furnace roof is an important element of the electric arc furnace, working in the smelting process is very harsh conditions. For example, continuous high temperature, mechanical vibration, rapid cold and heat, slag erosion, dust particle scouring, acid gas corrosion, etc., all cause damage to it. Especially its triangle area will be damaged earlier than the surrounding parts, often also because the triangle area resistant material used to the limit to cause the overall top of the furnace resistant material down the line. If a material is used to make the roof, and if it is damaged in the triangle area, it affects the whole roof, the outer part of the resistant material will be wasted. Therefore, in this case, the composite electric furnace roof came into being. In other words, the triangle part is made of high purity material, and the peripheral part is made of slightly lower grade material composite. In this way, the furnace top triangle area and the peripheral life can be synchronized. However, this composite roof in the production process and there is a great difficulty: when more than two kinds of materials to make the roof prefabricated parts, in forming either high-grade materials and low-grade materials easily mixed, reducing the grade of the triangle resistant materials, so as not to get the desired effect; either high-grade materials and low-grade materials between the interface is not handled well, resulting in the interface at the two materials delamination, cracking, shedding, etc.. Both of these two situations restrict the service life of composite furnace top prefabricated parts.

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