Low-carbon aluminum silicon carbide carbon brick containing nanocarbon and preparation method thereof

Abstract

The invention discloses a nanocarbon-containing low-carbon aluminum silicon carbide carbon brick and a preparation method thereof. The brick comprises high bauxite clinker with two granularities, brown fused alumina with two granularities, sub-white fused alumina, dispersible nanocarbon and the like. Through the application of the nano-carbon film and the dispersible nano-carbon, which are none, partially or completely coated on the surfaces of particles of three raw materials, comprising high-alumina bauxite clinker, brown fused alumina and sub-white fused alumina; the oxidation resistance ofthe nano-carbon is improved by utilizing the characteristics that the nano-carbon film and the dispersible nano-carbon are mainly amorphous carbon, contain a small amount of graphite chicks, can be infiltrated by a solvent and the like; therefore, infiltration and adsorption of the nano carbon film and the dispersible nano carbon to the organic binding agent are improved, the uniform dispersion of the nano carbon in the magnesia carbon brick is realized; finally, the size of carbon particles in the aluminum silicon carbide carbon brick is greatly reduced through the size control of the thickness of the nano carbon film and the dispersible nano carbon, so that the contact frequency of the refractory raw material of the aluminum silicon carbide carbon brick and the carbon particles is obviously improved, and the performance of the carbon particles under the condition of low carbon content is ensured.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low-carbon aluminum silicon carbide carbon brick containing nano-carbon and a preparation method. Background technique [0002] The molten iron tank is responsible for the transportation of hot molten iron between the blast furnace ironmaking and converter steelmaking processes. Due to the intermittent smelting mode of the converter, the molten iron is required to be mixed in at intervals according to the production rhythm of the converter, resulting in the intermittent service conditions of the molten iron tank and the fire resistance after mixing iron. The material lining is rapidly cooled and oxidized by cold air and rapidly heated by high-temperature molten iron when exposed to iron. Therefore, the refractory lining of the molten iron tank not only has to withstand the large temperature difference thermal shock impact of rapid cooling of air and rapi...

AI Technical Summary

Problems solved by technology

However, the introduction of superfine silicon carbide increases the cost of raw materials for making bricks. At the same time, the addition of a large proportion of pyrophyllite will inevitably affect the high-temperature strength of the brick body, and its high-temperature corrosion resistance needs to be further verified. In addition, the cancellation of carbon raw materials, its resistance Erosion and penetration performance also needs to be verified in production applications

[0010] To sum up, it can be seen that domestic scholars aim at the adverse effects on the performance of conventional aluminum silicon carbide carbon bricks such as easy oxidation, high thermal conductivity, and sintering shrinkage, as well as the economic problems caused by high cost, through the research of new antioxidants, semi-light The application of high-quality materials, the compounding of raw material components, the development of low-carbon and low-cost technologies, etc., have formed the patented technology of aluminum silicon carbide carbon bricks with their own characteristics, and achieved a single index significantly improved under laboratory conditions. effect, but the actual production conditions are very complex. Whether the improvement of a single index can achieve the expected application effect needs to be verified in actual production. In addition, the uniform dispersion of carbon materials is the core key to achieve low carbonization. How to avoid carbon materials Agglomeration, especially the ultrafine powder of carbon raw materials, needs further research and exploration

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