It is often designed according to the needs of users, so it is varied. Vacuum induction melting furnace generally consists of two parts: melting chamber and charging and auxiliary equipment.
Composition of vacuum induction melting furnace: medium frequency power supply, capacitor cabinet, furnace body, mechanical tilting furnace equipment (maybe hydraulic tilting furnace equipment), water distributor, crucible mould (maybe graphite crucible, iron crucible), water-cooled cable, connecting copper row.
There are two kinds of acid refractory and alkaline refractory for furnace lining. Acid furnace lining is made of quartz sand containing more than 98% silica. Due to its low melting point and poor stability, it is mainly used for smelting and heat preservation of non-ferrous metals and cast iron. The basic furnace lining is made of magnesia containing more than 85% magnesia. It is used for training special steel and nickel base alloy. Lining with dry or wet method of the appropriate particle size ratio of refractories by the solid layer by layer, dense, no stratification. Heat slowly for the first time to avoid cracking.
Exercise metal after induction heating, then the conduction to slag, so the slag temperature is low, and the furnace structure determines the interface of steel and slag is small, these are not conducive to molten pool - the physical and chemical reaction between slag, thus exercise special steel or nickel base alloy, should strive to use good raw materials, according to the damage situation of each element ingredients, rapid heating melting. When a lot of charge has been melted, it should be in slag, in order to reduce oxidation. Slag should be suitable for furnace lining. After full melting, according to the composition of the product, participate in the deoxidizer in batches (ferro silicon powder, calcium silicon powder, aluminum powder, etc.), sampling analysis when necessary, adjust the composition. To be qualified composition, deoxidizing outstanding, can be out of steel. The oxidation of cast iron is not severe in melting and heat preservation, and the metallurgical quality requirement is also low, which can give full play to the advantages of easy operation of induction heating.