The Use of Channel-type Inductors and Coreless Inductors in the Non-Ferrous Metal Industry

摘要

This article gives an overview of the different types of induction heating Units for melting, holding and holding/ casting furnaces. The presentation focuses on coreless inductors and their advantages over Channel type inductors when it comes to holding/casting of special copper alloys. At the example of a holding/casting furnace in an aluminium semi-fabrication plant in Europe the modification from a channel-type furnace into a furnace with coreless inductor technology is illustrated and explained. The paper gives technical information comparing the new detailing benefits, such as an increased service life of the furnace of up to three years with the crucible inductor. Photographs and diagrams show advantages as well as results from the testing and measurement of residue build up in the inductor. Especially the revamp and Upgrade of a 28 ton holding and casting furnace with a power of 200 kW to 40 tons and 450 kW will be demonstrated by construction and field results.