Low-carbon magnesia carbon brick containing nanometer zinc oxide

Abstract

A low-carbon magnesia carbon brick containing a nanometer zinc oxide is characterized in that the low-carbon magnesia carbon brick comprises the four following raw materials by weight percentage: 80-94wt% of electric melting magnesia particles, 1-5wt% of crystalline flake graphite, 1-3wt% of metal Al and 1-5wt% of nanometer zinc oxide, and 2-4wt% of a phenol formaldehyde resin with the quantity of the weight percentage sum of the four raw materials. The low-carbon magnesia carbon brick utilizes the characteristics of the nanometer zinc oxide powders such as fine granularity, high activity at high temperature, moderate price, and the like to improve the microstructure of the low-carbon magnesia carbon brick, prompts the used metal Al antioxidant to sufficiently play the role and prepares the low-carbon magnesia carbon brick with excellent comprehensive performance and moderate price. The prepared low-carbon magnesia carbon brick can be used for the steel-making furnace, the refining furnace and the lining of the steel ladle in the steel metallurgical industry, reduces the carbon added in the molten steel, reduces the temperature reduction of the molten steel and is beneficial for improving the quality of the steel and saving the energy resource.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a low-carbon magnesia-carbon brick containing nanometer zinc oxide. Background technique [0002] In order to meet the needs of the iron and steel industry for clean steel smelting, reduce the carbon addition of carbon-containing refractory linings to steel, and reduce the heat loss caused by high-carbon magnesia-carbon bricks, low-carbon magnesia-carbon bricks have received increasing attention. Directly reducing the carbon content in magnesia-carbon bricks will lead to deterioration of its performance, especially thermal shock resistance, erosion resistance and oxidation resistance, so various additives are used to improve the performance of low-carbon magnesia-carbon bricks. Chinese patent ZL99107800 discloses a composition consisting of 0.15-10wt% zinc powder or at least one of zinc powder, aluminum, magnesium, silicon, silicon-calcium powder, silicon carbide, ...

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Problems solved by technology

Chinese patent ZL99107800 discloses a composition consisting of 0.15-10wt% zinc powder or at least one of zinc powder, aluminum, magnesium, silicon, silicon-calcium powder, silicon carbide, boron carbide, magnesium-aluminum alloy powder, and silicon nitride powder. The antioxidant of carbon-containing refractory materials, although the antioxidant has a certain anti-oxidation effect, but the zinc powder is expensive, severely volatilizes at high temperature, and its role is quite limited, and the use of silicon and boron-containing raw materials will reduce the magnesium carbon. high temperature properties of bricks

The publication number is CN101037341A Chinese patent application disclosed "a non-oxide composite low-carbon magnesia-carbon brick", which can improve the erosion resistance of low-carbon magnesia-carbon bricks by using Sialon, magnesium aron, silicon nitride, aluminum nitride, etc. and thermal shock resistance, but these raw materials are expensive, and their own density and oxidation resistance are poor, which is detrimental to material performance when used

Publication number is CN101367669 Chinese patent application disclosed " containing B 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon brick and its preparation method" B used in 4 C-C composite powder and nano-TiC powder are difficult to synthesize, expensive, and may have no industrial application value for a long time

In addition, the publication number is CN101220195 Chinese patent application disclosed "phenolic resin containing nano-carbon powder, nano-carbon modified low-carbon magnesia-carbon brick and preparation method". The dispersion of nano-carbon powder in resin in actual industrial production There are still certain difficulties and high costs

[0003] These methods for preparing low-carbon magnesia-carbon bricks all have shortcomings such as high preparation cost, small application range, and low degree of industrial production.

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