Induction furnaces work by transferring heat energy through a high voltage primary coil, which induces high current, low voltage or secondary coils.
These types of furnaces are well suited for melting many metals while maintaining a low melt loss. When choosing the best melting furnaces for your foundry, it is important to understand how they operate.
There are two main types of these stoves: core-less and channel stoves.
Coreless furnace: Coil is the main heating component of coreless furnace. The furnace gets its name from the coil, which is made of highly conductive copper tubes and wound into a spiral coil before being placed in a steel casing. To reduce the risk of overheating, the coil itself is water-cooled by circulating towers.
The frequency used can vary between 50 and 10,000 cycles per second (referred to as power supply frequency and high frequency, respectively). The higher the frequency, the more power can be applied to the furnace. Once the material reaches a molten state, the interaction between the magnetic field and electric current creates an agitation reaction that helps mix the alloy and distribute the temperature evenly throughout the process.
Channel furnace: The channel induction furnace consists of a refractory steel housing to contain the heated metal. Connected to this is the primary induction unit. The unit consists of an iron core around which induction coils are wound.
The resulting heat circulates the metal into the main well, creating its own agitation - similar to the one mentioned above. These types of furnaces are suitable for melting low melting point alloys or for use as holding houses for high melting point metals.
Induction furnace benefits
No matter what type of induction furnace your foundry requires, this type of induction furnace can offer specific advantages that other alternatives cannot match.
Induction furnaces are suitable for melting metals such as gold and silver, copper, aluminum, silicon, brass and zinc. Steel and iron can also be melted for industrial use.
They don't require much space to run, making them ideal for foundries of all sizes. They are also more environmentally friendly than some alternatives. They are highly energy efficient, which means they do not adversely affect a company's energy consumption, and they are ideal for foundries looking to reduce their environmental footprint in terms of production.
They have less combustion loss, higher overall yields, and are easier to automate than alternatives.
When considering which furnace is best for your foundry, consider the benefits of induction smelting and whether the induction furnace is right for you. Not only do they save space, but they also reduce wastage, save energy, and melt the most commonly used metal types.
For better and more efficient smelting in induction furnaces, the feedstock charge must meet the following criteria.
Compaction of dense waste is important to ensure even and rapid heating as well as energy saving.
Clean rust, oil and sand should be zero.
Metallurgical cleanliness is the absence of slag blocks, oxides, etc., especially for direct reduced iron, slag and iron alloys.
There are no or few sharp edges, especially in the case of heavy and large scraps.
Electric power is the only source of energy for induction furnace steelmaking. The induction furnace is operated at maximum power from the beginning. There is some misunderstanding that the first low oven, and then gradually raise to high oven.
The maximum power input increases the melting rate and thus reduces the heating cycle time. Also monitor the voltage drop of the power supply to improve energy efficiency. Further power consumption rates depend on furnace size.
In addition, pay attention to the merchant's after-sales service and early guidance when purchasing.
That's it for today. Luoyang Judian is a furnace company, welcome to pay attention to us, you can learn more about metal melting furnace.