Process method for reopening old furnace of cored line-frequency induction electric furnace for producing copper-nickel alloy

Abstract

The invention discloses a process method for reopening an old furnace of a cored line-frequency induction electric furnace for producing a copper-nickel alloy, comprising the following steps of: adding impurity components obtained by alloying and smelting electrolytic copper for diluting a smelt groove die before stopping the cored line-frequency induction electric furnace for producing the copper-nickel alloy; introducing cooling water before opening the furnace, feeding 240 V of electricity to check a main circuit, a control loop and a cooling water system in a short time; inducting and heating to smelt the smelt groove die by an iron core coil to communicate the smelt groove die by adopting a mode of adjusting the voltage to gradually and stably rise; and heating an upper hearth and the smelt groove die while feeding electricity and baking to smoothly fuse the smelt groove die in a short time. The invention ensures the reuse of the old furnace, prolongs the absolute service life of the cored line-frequency induction electric furnace, saves the fees of the cored line-frequency induction electric furnace for building and casting the furnace and reduces the production cost of each ton of products.

Description

technical field [0001] The invention belongs to the technical field of starting an old furnace of a cored power-frequency induction furnace, and mainly relates to a process method for restarting an old furnace of a cored power-frequency induction furnace for producing white copper. Background technique [0002] Among the main equipment used in the production of copper alloys, the main advantages of the power frequency cored induction furnace are: less investment in equipment, high electrical efficiency, and low power consumption per unit product; slag-free casting can be achieved, and the quality of the ingot is higher; the main disadvantages Yes: Compared with the medium frequency coreless electric furnace, the cored power frequency induction furnace with the same capacity has a slower melting speed, which is suitable for large-scale, continuous and single-species production. It cannot be stopped and started immediately, and it is not easy to change the alloy grade. Every t...

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Problems solved by technology

[0002] Among the main equipment used in the production of copper alloys, the main advantages of the power frequency cored induction furnace are: less investment in equipment, high electrical efficiency, and low power consumption per unit product; slag-free casting can be achieved, and the quality of the ingot is higher; the main disadvantages Yes: Compared with the medium frequency coreless electric furnace with the same capacity, the cored power frequency induction furnace has a slower melting speed, which is suitable for large-scale, continuous and single-species production. It cannot be stopped and started immediately, and it is not easy to change the alloy grade.

The cored power frequency induction furnace of casting copper alloy is relatively mature in the oven technology of the new furnace, but the process method of reopening the old furnace has not been satisfactory, especially the old furnace reopening of the cupronickel cored power frequency induction furnace Process methods have not been able to achieve effective breakthroughs

In the re-opening of the old furnace, the most likely problem with the cored power frequency induction furnace is the broken groove of the copper melting channel mold, which leads to the failure of the furnace start-up and the failure of normal production

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