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About Non-Ferrous Refractories Requirement of Induction Furnace
Induction furnaces are one of the most challenging of all refractory applications.
Refractory materials for induction furnaces need to be selected according to the furnace type, furnace structure, type of steel to be smelted, smelting process and operating conditions, etc.
At the same time, the phase and physical properties of the refractory material from room temperature to working temperature should also be considered.
Change process and change mechanism, and application conditions of refractory materials, etc.
Materials of Non-Ferrous Refractories Requirement
When smelting cast iron and non-ferrous metals in a coreless induction furnace, SiO2, ZrO2•SiO2 and their composite refractories are generally selected.
Since ZrO2•SiO2 is thermally decomposed at high temperature to form £ZrO2 and fSiO2, which are evenly distributed in the material, thus giving the material high temperature plasticity and corrosion resistance, indicating that ZrO2 can prolong the service life of SiO2 refractory materials.
Non-ferrous metal smelting has the following characteristics:
(1) The smelting temperature is generally lower
(2) The fluidity and penetration ability of molten metal or metal oxide are very strong
(3) Slag and molten metal are very aggressive
(4) The temperature in the furnace changes greatly
The requirements of non-ferrous metal smelting for refractory materials are mainly erosion resistance, permeability resistance and thermal shock stability.
The commonly used lining refractory materials for non-ferrous metal smelting furnaces include various magnesia-chrome bricks, magnesia bricks, periclase spinel bricks, silicon carbide bricks and unshaped refractory materials of various materials.
Among them, magnesia-chrome bricks are the most commonly used.
For more knowledge about refractory materials, please look forward to our later news section.
See below for requirements on cast iron refractories for induction furnaces.