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The utility model relates to a melting ditch used in a melting ditch type induction melting furnace, which typically smelts non ferrous metals such as copper, aluminum, zinc, and their alloys, and is particularly suitable for the restructuring of single-phase melting ditch type induction furnaces.

At present, without changing the power of the original electric furnace, domestic and foreign experts have conducted various studies on the above mentioned melting groove or furnace structure, with the aim of improving furnace life, shortening thawing time, simplifying operation process, and improving the economic benefits of this type of induction melting furnace. Enterprises such as the APTeMOB nonferrous metal processing plant in the Soviet Union divided the groove opening on the large end face of the molten groove into two branches, making the current flowing through the groove undergo a 90 degree bend. At the bend, an electric force perpendicular to the current is generated, forcing the metal liquid to accelerate its flow under the action of the bottom-up electric force, shortening the melting and thawing time and reducing the probability of groove breakage. However, this method complicates the processing, casting, and furnace building processes of the weld groove, and is not sufficient to prevent the cold material from directly inserting and damaging the furnace lining at the large end and bottom of the weld groove. For the same purpose, there are also plans to force the flow of molten metal in the groove to equalize the temperature of the upper and lower parts of the groove, as well as the so-called variable cross-section structure groove that is being promoted and used by domestic units such as Anshan Metal Material Factory.