Coaxially-powered self-consuming electric arc vacuum skull furnace

Abstract

A coaxially-powered self-consuming electric arc vacuum skull furnace comprises a red-copper crucible assembly and coaxial conducting rod assemblies. Two sets of conducting lugs, supporting legs and spring mechanisms are symmetrically installed on a flange on the end face of a red-copper crucible. The two coaxial conducting rod assemblies are driven by two out-furnace cylinders to move. The conducting rod assemblies are composed of supporting rods, conducting rods, water-cooling steel bushings and conducting rod control cylinders. Conducting flanges of the two sets of conducting rods press against the flange surface of the crucible to produce a certain extrusion stress. According to the coaxially-powered self-consuming electric arc vacuum skull furnace, the power supply mode of an existing domestic skull furnace crucible is changed, symmetrical power supply is adopted, and therefore magnetic fields around a smelting electric arc are uniform; in this way, the problems that a red-copper crucible is broken down by the electric arc and then leaks water and produces steam and oxyhydrogen explosion due to magnetic bias are eliminated. Meanwhile, the crucible can be integrally moved out of a furnace chamber, and therefore the vacuum skull furnace is quite convenient to install, clean and maintain.

Description

technical field [0001] The invention belongs to the improvement of a vacuum consumable electric arc shell solidification furnace in the technical field of melting and casting of rare metals such as titanium and zirconium. Background technique [0002] At present, some of the power supply methods of the current domestic and foreign vacuum consumable arc shell condensing furnaces are powered by the tilting shafts on both sides of the crucible water jacket; some are powered by one side of the tilting shaft of the crucible water jacket. The tilting shaft not only needs to supply water to the crucible, but also needs to supply power and torque, and it needs to be disassembled repeatedly. The above-mentioned structures and power supply methods all have uneven distribution of the magnetic field in the furnace, resulting in uneven distribution of the magnetic field during the melting process. , the arc is affected by the magnetic field force to produce magnetic deflection, and the w...

AI Technical Summary

Problems solved by technology

The tilting shaft not only needs to supply water to the crucible, but also needs to supply power and torque, and it needs to be disassembled repeatedly. The above-mentioned structures and power supply methods all have uneven distribution of the magnetic field in the furnace, resulting in uneven distribution of the magnetic field during the melting process. , the arc is affected by the magnetic field force to produce magnetic deflection, the water-cooled crucible is easily broken down by the arc, and then steam and hydrogen-oxygen explosions occur, which is very unsafe and affects the production schedule, causing great economic losses for the enterprise

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