Modern Melting & Holding Furnaces for Light Metals

Abstract

THERE are so many types of furnaces which are used for melting light metals. The modern melting plants incorp-orating an outline on the design of the furnaces and the experience gained by the leading manufacturers of such types of furnaces are described in brief in this paper. In foundry practice, two different types of operation are performed, viz. the regular melting operation and the combined melting and holding operation. The coreless mains-frequency crucible-type induction furnace as shown in Fig. I is used for nicking operat- ions to an ever increasing extent. The metal is held in a rammed ceramic crucible whose life will extend from one to live scars dependent on attendance and maintenance.The metal to he melted or the liquid melt constitutes the secondary part of the furnace trans-former. The heat is generated in the melt by the watercooled primary coils. The furnace is tilted by hydraulical means and the quantity of metal poured at a time can be adjusted to requirements.