What should we pay attention to when choosing lining refractories for intermediate frequency furnace? Below, take a look at it with the small edition of Hubei lining material manufacturers!

1, the lining material should have sufficient refractoriness

The temperature of molten steel during smelting can reach 1700℃ or above; The temperature of liquid iron can reach more than 1500℃. Therefore, it is necessary to choose the lining material that can meet the melting temperature or withstand partial and frequent high temperature according to the smelting material. 2, the lining material should have good chemical stability

During use, slag erosion is a refractory material. Common forms of damage. In actual use, more than 59% of the damage is caused by the erosion of slag. Therefore, slag resistance is also one of the important standards of furnace lining materials. Under the contact of high temperature liquid metal, high vacuum, high (acid) alkaline slag, it should not be decomposed and reduced, not participate in chemical reactions, and has good chemical stability;

3, the thermal conductivity of the lining material should be small, and the conductivity should be low

In the melting process of intermediate frequency furnace, the temperature difference between the inside and outside of the furnace wall is very large, about 10% to 15% of the heat is lost through the furnace wall, in order to reduce heat loss and improve thermal efficiency, the lining material should have low thermal conductivity. At the same time, the lining material should have a low conductivity, can not contain magnetic induction, especially the lining knotting process is not allowed to metal or strong conductive substances included in it.

4, the lining material must meet the requirements of environmental protection, with high cost performance

The use of lining materials does not release toxic, harmful and environmentally polluting substances to the human body, and the waste after use can not cause harm to the environment. From the economic and practical point of view, the material and requirements of the smelting, the choice of lining should only choose the right, not the expensive.

5, the furnace lining material has good shock resistance

It should have good resistance to cold and heat, adapt to the stress generated in the lining wall due to the rapid change of temperature and pressure from high temperature melting to the oven after the oven without cracking, the better the heat shock resistance, the higher the service life of the lining.

6, the lining material should have a certain high temperature strength

In the smelting process, the furnace wall should be subjected to the impact force of the metal charge, the static pressure of the metal liquid, the force of the electromagnetic stirring the metal liquid movement, and the temperature difference stress, so the lining material should have a certain high temperature strength, and do not crack and resist erosion under the action of a variety of forces.

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