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What is the reason for the local heating of the yoke of the 20 ton steel shell intermediate frequency furnace?

What is the reason for the local heating of the yoke of the 20 ton steel shell intermediate frequency furnace?

For the yoke of a 20-ton steel-shell intermediate frequency furnace, because the silicon steel sheet forming the yoke generates a large amount of heat, it needs to pass water to dissipate heat. Although part of the magnetic field is concentrated, it is consumed by the loss of the silicon steel sheet. Therefore, the steel shell induction furnace is more inductive than the aluminum shell Does the furnace not save electricity? From the perspective of energy conservation, the outer shell of the aluminum shell induction furnace does not need to pass water to dissipate heat, while the shell and yoke of the steel shell furnace require many water pipes to dissipate heat. The steel shell induction furnace must waste electric energy than the aluminum shell induction furnace. In actual use, a one ton of energy-saving aluminum shell induction furnace uses less than 500kwh for melting one ton of steel, and a one ton of steel shell induction furnace uses more than 600kwh for melting one ton of steel.

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