Large-tonnage double-frequency coreless induction melting electric furnace

Abstract

The invention relates to a large-tonnage double-frequency coreless induction melting electric furnace, which belongs to the technical field of induction furnaces, and comprises an intermediate-frequency circuit, a low-frequency circuit and a molten pool, the intermediate-frequency circuit and the low-frequency circuit are respectively connected with the molten pool and are used for generating alternating current around the inner cavity of the molten pool; the control module is electrically connected with the intermediate-frequency circuit and the low-frequency circuit respectively, controls starting and stopping of the intermediate-frequency circuit and the low-frequency circuit, and instructs the intermediate-frequency circuit to be started and instructs the low-frequency circuit to be closed when the control module is in a first stage; the control module instructs the intermediate-frequency circuit to be closed and instructs the low-frequency circuit to be started when in the second stage; the detection module is used for detecting the metal temperature of to-be-processed metal in the molten pool and uploading the metal temperature to the control module, and the control module is used for judging whether the metal temperature reaches a threshold value or not and switching from the first stage to the second stage when the judgment result is that the metal temperature reaches the threshold value; the device has the characteristics of both smelting temperature and stirring force adjustment and good smelting effect.

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