Preparation method of glucose combined magnesia carbon brick

Abstract

Belonging to the technical field of refractory material preparation, the invention relates to a preparation method of a glucose combined magnesia carbon brick. The method adopts magnesite (fused magnesite or sintered magnesite) and a carbon raw material (flake graphite, carbon black or electrode chip) as the main raw materials, glucose is added as a binding agent and other additives are added, and by means of compounding, mixing, aging, molding, drying and other technological processes are carried out to obtain a non-fired magnesia carbon brick. The refractory material provides low temperature strength through the glucose binding agent, and the glucose binding agent undergoes thermal decomposition and carbonization to form a carbon structure so as to provide medium and high temperature strength. Compared with the traditional phenolic resin combined magnesia carbon brick, the glucose combined magnesia carbon brick has the advantages of environmental friendliness and low cost. The preparation method also provides the technical and theoretical basis for application of glucose binding agent to other high-temperature resistant materials.

Description

Technical field: [0001] The invention relates to a method for preparing glucose-bonded magnesia-carbon bricks, belonging to the technical field of refractory material preparation. Background technique: [0002] Carbon-containing refractories are high-performance refractories developed to adapt to new iron and steel metallurgical technologies and new processes. Magnesia-carbon bricks are an important part of the refractory system. It has both the high melting point of MgO and carbon and excellent chemical stability. At the same time, the introduction of carbon overcomes the shortcomings of MgO's high thermal expansion coefficient, easy wetting by slag, and poor spalling resistance, making magnesia carbon bricks have corrosion resistance, good thermal shock resistance and good resistance to metal melts and high-temperature slag It has the advantages of strong impermeability and other advantages, and is mainly used in clean steel smelting ladles, casthouses, molten iron storage...

AI Technical Summary

Problems solved by technology

[0005] The present invention is based on the fact that the commonly used binders for magnesia-carbon bricks are phenolic resin and coal tar pitch, which will release harmful gases such as formaldehyde and phenolic compounds in the process of research and development, production and use, and cause serious harm to the environment and human health. A high-performance environmentally friendly magnesia carbon brick prepared by using an environmentally friendly sugar compound glucose instead of phenolic resin and coal tar pitch as a binder