What properties should furnace lining refractories have? Below, take a look with the small edition of Hubei lining Material Sales company!

1, high enough refractoriness. The operating temperature of the furnace lining is generally lower than that of the molten metal. However, taking into account the requirements for the life of the furnace lining, it is necessary to consider the occasional or frequent overtemperature of the molten pool and the molten groove, the fluidity of the cast iron is good, the use of materials with low refractoriness and softening temperature in the cast iron induction furnace is often uncomfortable, as the refractory material for the production of cast iron products, the refractoriness should reach 1650~1700℃, and the softening temperature should be higher than 1700℃.

2, the coefficient of thermal expansion is small, with the change of temperature, the volume should be relatively stable, there is no severe expansion and contraction.

3, good chemical stability, the chemical stability of the material and the life of the lining has a close relationship, the lining material should have at low temperature shall not be hydrolysis differentiation, at high temperature should not be easy to decompose and reduce, in the melting process should not be easy to form a low melting point with the slag material. It is not easy to react with metal solution, solvent and slag.

4, with high mechanical properties. When the temperature in the furnace is low, it can withstand the impact of the charge, and when the metal is in a high temperature melting state, it should be able to withstand the static pressure of the metal liquid and the strong electromagnetic stirring effect, and wear resistance and corrosion resistance under the long-term erosion of the metal liquid.

5, good edge performance. Furnace lining should not conduct electricity at high temperature, otherwise there will be leakage and short circuit, resulting in safety and equipment accidents.

6, the construction performance of the material is good, repair, sintering performance is good, furnace building and maintenance is convenient.

7, no iron oxide and low melting point minerals and other harmful impurities.

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