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Refractory requirements for Induction furnace
Jan 04, 2018

Induction furnace is the use of electromagnetic field induction principle of electrical energy into heat, so that the metal charge heat melting high-temperature melting equipment. According to the structure, there is no core induction furnace and core induction furnace.

The refractory environment for induction furnaces is one of the most challenging of all refractory applications.

Induction furnace steelmaking method according to the nature of refractory smelting acid and alkaline smelting method. Refractory materials used in sour smelting are mainly quartz sand and zircon. Alkaline smelting method used for the neutral refractory materials, alkaline refractory or graphite crucible.

Historically, there have been several series of refractory materials used for induction furnace linings, SiO2 and zircon have been used, but mainly aluminum, MgO-CaO and spinel refractory.

Coreless induction furnace refractory are: natural quartz sand, fused quartz, corundum, aluminum spinel, bauxite, magnesium, magnesium spinel, alumina.

Induction furnace due to the diversification of functions, need a variety of high-performance refractory materials to adapt. The use of refractory should not only consider the furnace, furnace structure and melting process, but also to consider the refractory material and its normal phase to the working temperature between the mineral phase, the physical properties of the process of change and changes in the mechanism; also according to the application Requirements, especially the application of innovative equipment, require the selection of refractory materials and the improvement of material properties.

Now focusing on the use of AL2O3-based refractories, refractories must be equipped with MgO, chrome ore Cr2O3, and pre-synthesized Spinel to optimize material properties.