Coreless furnace named is relative intentional furnace, the metal liquid in a crucible, therefore, also known as the crucible furnace. This type furnace is mainly used in special steel, cast iron, non-ferrous metal and its alloy melting and heat preservation. Coreless furnace has a high melting temperature, less impurity contamination, alloy composition uniformity, good working conditions and many other advantages. Compared with intentional furnace coreless furnace furnace and a change in metal varieties are more likely to use more flexible, but its power, is far less than intentional furnace thermal efficiency. Coreless furnace because of the low surface temperature, slag formation of high temperature melting.
Coreless furnace with high frequency, intermediate frequency and power frequency.
(1) high frequency coreless furnace
High frequency coreless furnace capacity generally under 50 kg, suitable for laboratory and small scale production for smelting special steel and special alloy.
(2) the medium frequency coreless furnace
The capacity and power of the medium frequency coreless furnace are bigger than high frequency furnace. Mainly used in special steel, such as magnetic alloy and copper alloy melting. The furnace due to the need for expensive frequency conversion equipment, so in some large capacity situation has changed labor frequency coreless furnace. However, compared with power frequency furnace, intermediate frequency furnace also has its unique feature. As for the same capacity of the furnace, intermediate frequency furnace input power is greater than power frequency furnace, so the melting speed is faster, intermediate frequency furnace in cold furnace melting block, do not need a furnace on liquid metal can be poured out, so than when using flexible power frequency furnace; In addition, medium frequency melting furnace crucible lighter scouring solution, good for lining. Therefore, in the development of the high power of intermediate frequency power supply cheap, intermediate frequency furnace is promising.
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