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Exploration on the application of waste refractory materials in steel industry
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Published time: 1855 days ago
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Exploration on the application of waste refractory materials in steel industry
1. Waste refractory materials should be sorted and recycled
In the iron and steel industry, there are many kinds of waste refractory materials with complex components. In order to maximize the rational utilization of different waste refractory materials, it is necessary to conduct classification research according to the chemical properties, production methods and supply forms of waste refractory materials. Through unified recycling scrap iron and steel enterprise high alumina brick, magnesite brick masonry wall with the furnace, iron pot mouth with skateboarding, ferroalloy smelting furnace discarded castable, ladle castable, discard all kinds of refractory sorting sieve, according to the department of magnesium oxide, alumina, carbon, do not contain carbon recycling, respectively, and the mixed with dissimilar materials or iron, still must through the magnetic separation method to separate it. It can roughly form different material products such as waste magnesia carbon brick, waste aluminum magnesia carbon brick, waste aluminum silicon carbide brick, waste magnesia brick, magnesia chrome brick, waste high aluminum brick (including mullite and steel jade brick), which can be directly used in the production material requirements of each steel enterprise.
2. New refractories should be added according to the ratio
Steel scrap refractory after screening, also can be mixed ratio of new refractory in-depth recycle processing, again by extrusion molding, casting integrity or casting molding mode of production, processing into a new refractory products, so as to meet the requirements of other processes using refractory material, reduce the refractory material preparation in the iron and steel enterprise production and operation costs. At present, in terms of material distribution into the method, has carried on the quite rich, and in the regeneration of dense refractory aggregate, and the use of chemical reagents of recycled aggregates has obtained certain achievements in such aspects as the separation, makes it possible to by various types of scrap refractory with the application of new materials to conduct a comprehensive recycling. However, in the future development process, it is necessary to further promote the comprehensive application of waste refractories, improve the added value and technological level of recycled products, so as to make the application range of waste refractories more extensive and reduce the environmental pollution caused by refractory solid waste materials.
3. Improve the regeneration technology of waste materials
A large number of practices have shown that to improve the technical process and application level of waste refractory materials, on the one hand, it can improve the corrosion resistance and wear resistance of waste refractory products, effectively improve the quality of waste refractory material reproduction, reduce the loss of refractory materials, and play a role in optimizing the recycling and utilization of waste refractory materials. On the other hand, it can also be widely used in blast furnace ironmaking, molten iron pretreatment, off-furnace refining and converter steelmaking, which not only reduces the production risk, but also effectively improves the output and quality of steel metallurgy. Therefore, in order to strengthen the application of waste refractory materials in the steel industry, it is not only necessary to make comprehensive use of all kinds of refractory materials, but also need to pay attention to the regeneration technology of waste refractory materials, and to process and apply the different kinds of refractory castable lining. For example, the comprehensive recycling technologies such as the ramming material for the ctg-2a main groove joint, the aluminum carbon brick for splash prevention in steelmaking, and the central part of the CAS impregnated pipe can effectively improve the performance of high value-added products of different waste refractories, so that the comprehensive recycling of waste refractories can fully meet the technological requirements of the steel industry.
In the iron and steel industry, there are many kinds of waste refractory materials with complex components. In order to maximize the rational utilization of different waste refractory materials, it is necessary to conduct classification research according to the chemical properties, production methods and supply forms of waste refractory materials. Through unified recycling scrap iron and steel enterprise high alumina brick, magnesite brick masonry wall with the furnace, iron pot mouth with skateboarding, ferroalloy smelting furnace discarded castable, ladle castable, discard all kinds of refractory sorting sieve, according to the department of magnesium oxide, alumina, carbon, do not contain carbon recycling, respectively, and the mixed with dissimilar materials or iron, still must through the magnetic separation method to separate it. It can roughly form different material products such as waste magnesia carbon brick, waste aluminum magnesia carbon brick, waste aluminum silicon carbide brick, waste magnesia brick, magnesia chrome brick, waste high aluminum brick (including mullite and steel jade brick), which can be directly used in the production material requirements of each steel enterprise.
2. New refractories should be added according to the ratio
Steel scrap refractory after screening, also can be mixed ratio of new refractory in-depth recycle processing, again by extrusion molding, casting integrity or casting molding mode of production, processing into a new refractory products, so as to meet the requirements of other processes using refractory material, reduce the refractory material preparation in the iron and steel enterprise production and operation costs. At present, in terms of material distribution into the method, has carried on the quite rich, and in the regeneration of dense refractory aggregate, and the use of chemical reagents of recycled aggregates has obtained certain achievements in such aspects as the separation, makes it possible to by various types of scrap refractory with the application of new materials to conduct a comprehensive recycling. However, in the future development process, it is necessary to further promote the comprehensive application of waste refractories, improve the added value and technological level of recycled products, so as to make the application range of waste refractories more extensive and reduce the environmental pollution caused by refractory solid waste materials.
3. Improve the regeneration technology of waste materials
A large number of practices have shown that to improve the technical process and application level of waste refractory materials, on the one hand, it can improve the corrosion resistance and wear resistance of waste refractory products, effectively improve the quality of waste refractory material reproduction, reduce the loss of refractory materials, and play a role in optimizing the recycling and utilization of waste refractory materials. On the other hand, it can also be widely used in blast furnace ironmaking, molten iron pretreatment, off-furnace refining and converter steelmaking, which not only reduces the production risk, but also effectively improves the output and quality of steel metallurgy. Therefore, in order to strengthen the application of waste refractory materials in the steel industry, it is not only necessary to make comprehensive use of all kinds of refractory materials, but also need to pay attention to the regeneration technology of waste refractory materials, and to process and apply the different kinds of refractory castable lining. For example, the comprehensive recycling technologies such as the ramming material for the ctg-2a main groove joint, the aluminum carbon brick for splash prevention in steelmaking, and the central part of the CAS impregnated pipe can effectively improve the performance of high value-added products of different waste refractories, so that the comprehensive recycling of waste refractories can fully meet the technological requirements of the steel industry.
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