Refractories for CORELESS INDUCTION FURNACE

CORELESS INDUCTION FURNACE | Medium-frequency induction furnace

The Coreless Induction Furnace, commonly known as CIF, is an effective furnace type for smelting of steel, iron, copper, aluminum and alloy, with high melting efficiency, good power saving effect, uniform metal composition, less burning loss, fast temperature rise, easy temperature control and other characteristics, suitable for all kinds of metal smelting occasions.Top performing refractory solutions for this equipment need to strike a balance between the speed of relining and refractory performance.

1.Coil cement/coil castable for coreless induction furnace/ Red mud

Product Specifications: Coreless induction furnace coil red mud

Scope of application: It is designed to be used as a smear protection material between the turns of the coreless induction furnace coil and the inner surface of the coil. It plays the role of insulation, heat insulation and delaying the deformation of the coil, which can effectively prevent the occurrence of short circuit between turns of the coil; and can block the penetration of molten metal and other harmful substances within a certain period of time. Product introduction: Coil clay (red clay) is made of white corundum sand and powder as the matrix, adding appropriate amount of hydraulic additives, active agents, plasticizers, etc. The design considers fire resistance, insulation and operability. With high refractoriness, the red mud of the coil plays the role of insulation, heat insulation and delaying the deformation of the coil. Once the molten metal penetrates into the furnace lining, it can protect the coil from the molten metal and effectively prevent the inter-turn short circuit of the coil. phenomenon occurs.

2.Dry vibrating mix

Intermediate frequency furnace basic dry ramming material is a new type of refractory material. The steel grades smelted in the intermediate frequency furnace are stainless steel 304#, 301#, 204# and other steel grades. Therefore, the raw materials of the ramming material are neutral and basic refractory materials, mainly including: Fused magnesia, high-purity spinel, sintered magnesia and medium and low temperature sintering agents. When knotting the intermediate frequency furnace lining, asbestos cloth must be laid on the inside of the inductor. The thickness of each layer of the furnace wall is 100-140mm, and the thickness of the bottom knot is 300mm. The thickness of the slag line is 120mm, and the wall thickness is 90mm. Oven time ≥ 8 hours. In the application observation, the lining of the intermediate frequency furnace using corundum spinel dry material knotted, the lining is smooth and flat, no cracks fall off, and a layer of 4-6mm slag is formed on the surface, which is conducive to reducing the amount of scrap steel in the lining. Mechanical damage and slag erosion in the process. The intermediate frequency furnace basic dry ramming material is easy to sinter in the steelmaking process, and has a high thermal strength, which can meet the needs of smelting stainless steel. The furnace lining knotted with this kind of ramming material has a service life of 108 times, 80 times, and the average erosion rate of the furnace lining is 0.6mm/furnace, which exceeds the service life of similar foreign products. The forming lining of the intermediate frequency furnace has good integrity, and is easy to construct and dismantle.

3.Ramming mass

The intermediate frequency furnace ramming material is also called the intermediate frequency furnace lining material. It is divided into acidic, neutral and basic ramming materials. The acid ramming material is mainly made of high-purity quartz and fused silica, and suitable additives are used as sintering agents; neutral The ramming material uses fused corundum, high-purity magnesia, and high-purity spinel as the main raw materials, and uses compound additives as the sintering agent; the basic ramming material uses high-purity magnesia as the main raw material and appropriate additives as the sintering agent.

      Acidic, neutral and alkaline ramming materials are widely used in intermediate frequency induction furnaces and cored induction furnaces to melt gray cast iron, ductile iron and other ferroalloys, and to melt carbon steel, high manganese steel, tool steel, and heat-resistant steel. , stainless steel and other alloy steel, melting aluminum alloy, copper alloy, etc.

    The intermediate frequency furnace ramming material produced by DEFLAI new material has excellent volume stability and corrosion resistance, and has a long service life during use. Our company can also provide professional design for intermediate frequency furnace refractory materials according to customer needs .

4.Bottom blowing argon plug

Through the use of the Bottom blowing argon plug, the refining technology of the intermediate frequency induction furnace is summed up, which makes the ordinary intermediate frequency induction furnace change from chemical steel to steelmaking. Quality level of degassing furnace refining.

Advantages :1. Promote inclusions in molten steel to float, reduce inclusions, and improve the quality of molten metal;

2. Improve the use effect of additives;

3. Reduce scrap rate;4. Extend the life of the furnace lining;

5. Low investment;

6. Endow the induction furnace with refining function to provide strong technical support for improving the quality of molten metal and developing new products.

5.Repairing mix

This product uses selected high-grade high-alumina and fused corundum as the main raw materials. By optimizing the particle gradation of the material and using a composite plastic binder, the repair material has good smearing or ramming performance, and is closely combined with the sintered layer of the furnace lining. . The use of repair materials can greatly improve the life of the furnace lining, reduce the consumption of refractory materials per ton of castings, and reduce the cost of the furnace lining. The use of non-phosphate binders avoids the disadvantage that the phosphates in ordinary phosphate-bonded repair materials decompose and increase phosphorus in molten steel at high temperatures.