Magnesia carbon brick using phenolic resin added with catalyst

Abstract

The invention relates to the technical field of magnesia carbon bricks, and discloses a magnesia carbon brick using phenolic resin added with a catalyst. The magnesia carbon brick comprises the following ingredients: a component A, a component B and a component C, wherein a content ratio of the component A to the component B to the component C is 3: 1: 1; the component A is composed of fused magnesite, flake graphite and a binding agent in a content ratio of 3: 1: 4; the component B is composed of ceramic and ferroferric oxide powder in a content ratio of 3: 1; and the component C is composedof glass fibers and a catalyst in a content ratio of 2: 1. In the magnesia carbon brick using phenolic resin added with the catalyst, the use of the iron-catalyzed phenolic resin promotes the structural rearrangement of the magnesia carbon brick, leads to the formation of nanotubes and more ceramic whiskers, improves the performance of the magnesia carbon brick at high temperature, and obviously enhances the oxidation resistance and mechanical strength of the magnesia carbon brick.

Description

technical field [0001] The invention relates to the technical field of magnesia-carbon bricks, in particular to a magnesia-carbon brick with catalyst added phenolic resin. Background technique [0002] Magnesia-carbon bricks are made of high-melting point basic oxide magnesia (melting point 2800°C) and high-melting point carbon materials that are difficult to be infiltrated by slag as raw materials, adding various non-oxide additives, and combining them with carbon binders. Non-burning carbon composite refractory material. Magnesia carbon bricks are mainly used in the lining of converters, AC electric arc furnaces, DC electric arc furnaces, and slag lines of ladles. [0003] Magnesia-carbon bricks have good high temperature resistance, strong slag resistance, good thermal shock resistance, and low high-temperature creep. In recent years, the development of low-carbon magnesia-carbon bricks has become a research hotspot. [0004] However, when the carbon content decreases, ...

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Problems solved by technology

[0004] However, when the carbon content decreases, the thermal shock resistance, flexibility and fracture toughness of magnesia carbon bricks will decrease when subjected to severe thermomechanical stress. In order to solve these problems, modern attempts to use nano-carbon sources such as carbon nanotubes and graphene Or graphite oxide nano-film, nano-carbon black, etc., improve the performance of carbon-containing refractory materials through nano-structure matrix. Although the application of nano-carbon effectively improves the physical and thermomechanical properties of magnesia-carbon bricks, the cost of nano-carbon is high and it is not easy to disperse uniformly.