Classification of intermediate frequency furnace charges

The intermediate frequency induction furnace is an induction coil made of copper tube wound on the outside of the furnace, and the metal charge is installed in the furnace. When the alternating current passes through the induction coil, an alternating magnetic flux is first generated in the coil, and passes through the closed metal charge. An induced current is generated within a certain depth of the surface, causing the charge to heat and melt. The furnace lining is made of refractory materials. The intermediate frequency furnace charge requires good corrosion resistance, peeling resistance, no cracks, and long service life. Let us explain the classification of intermediate frequency furnace charge.

1, acid refractory

The acid furnace lining material is made of high-purity microcrystalline quartz sand, powder, dry vibrating material mixed with high-temperature sintering agent and mineralizer, and the particle size and the amount of sintering agent are strictly controlled. The furnace lining. This product is mainly used in the melting process of gray iron, ductile iron and carbon steel in foundries, and is suitable for continuous high temperature environment, and can also be used for the melting of titanium alloys and high temperature non-ferrous metals.

2, neutral lining material

The neutral furnace lining material is a dry ramming material mixed with corundum sand, powder, aluminum-magnesium spinel powder and sintering agent. The furnace lining is mainly used for various alloy steels, carbon steels, stainless steels, etc. This material has excellent thermal shock stability, volume stability and high high temperature strength, and maintains a certain loose layer on the backing during normal use. .

3, basic furnace lining material

The basic furnace lining material is made of electro-fused or high-purity magnesia, powder, and dry ramming material mixed with aluminum-magnesium spinel powder and sintering agent. Its particle size distribution conforms to the theory of large bulk density, so it can be obtained through various knotting methods. The fine and uniform heating furnace lining is mainly used for various high alloy steel, carbon steel, high manganese steel, tool steel, stainless steel, etc. .

The refractory material of the coreless induction furnace has a high conversion rate of a-phosphorus quartz after sintering in the secondary oven 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, it is the looseness of the backing that holds firm.