Different selection of refractory materials for induction furnace
1. Acid refractory
Acidic furnace lining material, using high-purity microcrystalline quartz sand, powder, adding high-temperature sintering agent and mineralizing agent mixed dry vibrating material, strictly control the particle size and the amount of sintering agent added, so no matter how various knotting methods are used, compactness can be obtained. Lining. Acid lining materials are mainly used in the melting process of gray iron, ductile iron, and carbon steel in foundries, and are suitable for continuous high temperature environments, and can also be used for the melting of titanium alloys and high-temperature non-ferrous metals.
2. Neutral lining material
The neutral lining material is a dry ramming material made of corundum sand, powder, aluminum-magnesium spinel powder and sintering agent. Its particle size distribution conforms to the theory of maximum bulk density, so a dense and uniform furnace lining can be obtained by various knotting methods. It is mainly used for various alloy steels, carbon steels, stainless steels, etc. This material has good thermal shock stability and volume stability High temperature strength and high temperature strength, and maintain a certain loose layer of the backing during normal use.
3. Alkaline lining material
Alkaline furnace lining material adopts dry ramming material which is mixed with fused or high-purity magnesia powder, aluminum-magnesium spinel powder and sintering agent. Its particle size distribution conforms to the theory of maximum bulk density, so dense and uniform heating furnace lining can be obtained through various knotting methods. It is mainly used for various high alloy steels, carbon steels, high manganese steels, tool steels, stainless steels, etc. The material has high Refractoriness and high temperature strength, and maintain a certain loose layer of backing during normal use. The refractory of the coreless induction furnace has a high conversion rate of a-phosphosilicate after the first oven sintering due to the action of the mineralizer, so the oven time is short, and it has high volume stability, thermal shock stability and high temperature strength. In normal use, the backing maintains a certain degree of looseness.