Channel Melting Furnaces
Induction Channel Melting Furnaces
Induction channel furnaces are designed to fit most ferrous alloy foundry needs and are most well known for their continuous melting capabilities, maximum efficiency, flexibility (they can be used as melters, holders, off-peak melting, and have the advantage of holding large volumes of metal required for large or continuous casting), precise temperature control, low operating costs, and clean, quiet working conditions.
Channel furnace designs are typically configured in a vertical or drum layout. Where in a coreless furnace, the power coil surrounds the crucible, in a channel furnace, the induction field is concentrated around a channel loop housed within an inductor. This loop is attached to the uppercase (upper body), creating an induction field to heat colder molten metal within the channel loop. The inductor is the heart of a channel furnace and must be extremely reliable and predictable.
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Vertical Channel Furnaces
Vertical channel furnaces can be used for melting, holding, off-peak melting, and holding large volumes of metal required for large or continuous casting. The rugged, heavy steel construction is designed for long life under all foundry conditions. The furnaces are hydraulically titled and can be equipped with lift and swing lids for easy charging and slagging. The inductor cases are equipped with a machined flange that attaches to a mating flange mounted on the furnace body for quick inductor changes.
Rotary Drum Furnaces
Rotary drum furnaces are designed to accommodate foundries with restricted headroom or depth limitations. These furnaces can also be used for melting, holding, off-peak melting, and holding large volumes of metal required for large or continuous casting. They are constructed of heavy rolled steel plates with reinforced end plates. The ends of the drums are fitted with heavy steel rotating tires that surround the circumference of the furnace for added support. Furnace rotation can be accomplished hydraulically or with chain drive systems and hydraulic or air-operated doors can be provided to facilitate charging and slagging operations.
Superheaters are large drum furnaces with multiple high-power Jet-Flow™ inductors attached to the furnace body. They can be used to superheat blast furnace iron, as primary melters for cold scrap, or to perform a combination of both. Because of their massive size, superheaters are constructed with multiple heavy-duty steel ring sections and end caps that are assembled onsite. Rotation is accomplished with hydraulic cylinders or chain drive systems while hydraulically operated charge/slag doors facilitate operation, and the convenience of receiving and pouring metal simultaneously makes the superheater a viable solution for steelmaking facilities worldwide.
Induction Related Considerations in Investment CastingAug 24, 2007 by Ajax TOCCO Magnethermic
Learn the basics of induction and how induction furnace systems play a critical role in investment casting.