Low-carbon magnesia carbon brick with addition of titanium carbonitride and preparation method thereof

Abstract

The invention relates to a low-carbon magnesia carbon brick with addition of titanium carbonitride. The magnesia carbon brick comprises the following raw materials in parts by weight: 20-30 parts of fused magnesite with the particle size being greater than 3 mm and not greater than 5 mm, 10-20 parts of fused magnesite with the particle size being greater than 1 mm and not greater than 3 mm, 10-20parts of fused magnesite with the particle size being greater than 0 mm and not greater than 1 mm, 10-20 parts of 200-mesh fused magnesite, 1-10 parts of 200-mesh synthetic Ti (C, N) powder, 1-10 parts of 200-mesh graphite, 1-10 parts of 200-mesh carbon black, 1-10 parts of 200-mesh aluminum powder and 1-10 parts of a binding agent. When the refined steel ladle slag line magnesia carbon brick is produced, titanium carbonitride is added into a magnesia carbon material, and after high-temperature carbon burying treatment, the titanium carbonitride is still uniformly distributed in a matrix and is subjected to solid solution with MgO to a certain extent.

Description

Technical field [0001] The invention belongs to the field of refractories, and in particular relates to a low-carbon magnesium carbon brick added with titanium carbonitride and a preparation method. Background technique [0002] In order to ensure that titanium carbonitride is a solid solution formed by titanium carbide and titanium nitride, both TiN and TiC have a NaCl type crystal structure. The C atoms in the TiC lattice can be replaced by N atoms in any ratio to form a continuous Solid solution Ti(C1-xNx) (0≤x≤1). Titanium carbonitride is a kind of non-oxide ceramic material with excellent performance and wide application. It has the characteristics of high melting point, high hardness, wear resistance and corrosion resistance, and has good thermal conductivity, electrical conductivity and chemical stability. It is widely used in many fields, such as chemical industry, chemical industry, automobile manufacturing and aerospace, but there are still few reports on its applicati...

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Problems solved by technology

With the advancement of smelting technology, there are new requirements for refractory materials. In the long-term application practice of traditional magnesia carbon bricks, the following problems are found: (1) Due to the high thermal conductivity, the heat loss is increased, and the tapping temperature (2) As the lining material of special refining furnace, such as smelting high-quality clean steel and ultra-low carbon steel in VOD, it will cause carbon Increase problem; (3) Consume a large amount of precious graphite source

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