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What is direct induction heating?

What is direct induction heating?

Induction heating is a type of electric heating in which currents induced in the material by electromagnetic action are used to heat it. It is a contactless electric heating method in which the material will be heated without making any direct contact with the supply.

What is core less type induction furnace?

The coreless induction furnace can best be described as a refractory-lined vessel with an electrically energized/current-carrying, water-cooled copper coil surrounding it. Electrical current in the coil forms an electromagnetic field, which generates enough thermal energy to melt the charge.

What is direct arc furnace?

The direct arc furnace is the one in which the electric arc is struck between the electrode and the charge, to be heated, so that the arc current flows through the charge and there is a direct contact between the arc and the charge.

What is the frequency of supply used in core type induction furnace?

This furnace is very suitable for continuous operation, and it can be operated on standard supply frequency i.e., 50 Hz. The core is made of laminated steel, and the single turn of molten metal forms the secondary circuit.

What is the disadvantage of induction furnace?

The one major drawback to induction furnace usage in a foundry is the lack of refining capacity: charge materials must be free of oxides and be of a known composition, and some alloying elements may be lost due to oxidation, so they must be re-added to the melt.

What can be the advantages of induction furnace over conventional furnaces?

The induction metal furnaces are cleaner with greater control over emissions and their release to the environment. You can focus more on the foundry process with less waste generated. Additionally, the forges are less noisy compared to their open-hearth counterparts.

What are the difference between direct and indirect arc furnace?

the difference between an indirect and a direct arc furnace is that in a direct arc furnace,heat is subjected DIRECTLY to the material being heated while an indirect arc furnace,the arc burns above the charge thus is not direct and it doesn’t form a part of the electrical circuit.

What is the difference between electric arc furnace and induction furnace?

The electric arc furnace is stronger when it comes to dephosphorization than the induction furnace is. With the induction furnace, the slag is cold and the temperature of the slag is maintained by molten steel. With the arc furnace, the slag is hot and the furnace itself keeps it hot.

Where is induction furnace used?

Induction melting is often used for investment casting because they come in a wide variety of air and vacuum furnaces. These furnaces work great for nearly all metals. Precious metals melting. Steel is precious for many, but induction furnaces can also be used to melt precious metals such as platinum group metals.

How much power does an induction furnace use?

A modern coreless induction furnace can melt a tonne of iron and raise the temperature of the liquid metal to 1450 °C using less than 600 kWh of electricity. Typically, specific energy consumption of coreless induction furnace varies from 500 to 800 kWh per tonne depending on type and grade of casting.

What is the disadvantages of induction furnace?

What are the advantages of induction furnace?

Induction furnace capacities range from less than one kilogram to one hundred tons, and are used to melt iron and steel, copper, aluminum, and precious metals. The advantage of the induction furnace is a clean, energy-efficient and well-controlled melting process, compared to most other means of metal melting.

Which is better electric arc furnace or induction furnace?