Small electric arc smelting furnace

Abstract

The invention discloses a small electric arc smelting furnace. A vacuum hearth is included, and the lower end portion of the vacuum hearth is inserted and installed on an arc striking rod in the vacuum hearth; the lower end portion of the arc striking rod is fixedly provided with a tungsten needle, and the upper end portion of the arc striking rod is connected with a power source through an electrode binding post; the bottom of the vacuum hearth is provided with a water cooling crucible of a plurality of metal molten ponds, and the metal molten ponds are used for containing a metal melt; and the bottom of the water cooling crucible is connected with the power source through an electrode binding post. The small electric arc smelting furnace further comprises a metal corrugated pipe arrangedon the arc striking rod in a sleeving manner, and the lower end of the metal corrugated pipe is installed on the shell wall of the vacuum hearth; the upper end of the metal corrugated pipe is connected with the arc striking rod through a connection piece; and the metal corrugated pipe is provided with a corrugated pipe lower limiting frame and a corrugated pipe upper limiting frame. The small electric arc smelting furnace is convenient to operate, and then the complexity degree in the electric arc smelting operation process is effectively lowered; and meanwhile, the possibility that the tungsten needle reacts with the metal melt is remarkably lowered, and the stability and the success rate in the electric arc smelting process are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal melting, and in particular relates to a small electric arc melting furnace. Background technique [0002] Arc melting is an electrothermometallurgical method that uses an electric arc generated between an electrode and a charge to melt metal. Normally, when the power supply provides enough power, the gas between the positive and negative poles can continue to pass through a strong current and emit a strong brilliance, resulting in a height of thousands or even tens of thousands of degrees Celsius. When the arc is strong enough, it can also generate a strong stirring effect on the melt in the crucible, which is conducive to the sufficient uniformity of the material. Due to the above advantages, arc melting is widely used in metal master alloy configuration and refractory alloy melting, especially in the process of research and development of new materials, the arc melting process is often used to pr...

AI Technical Summary

Problems solved by technology

However, at present, the arc striking rods of small electric arc melting furnaces produced in China mostly adopt the connection form of worm gear or threaded screw. The arc rod and the charge stick together, which eventually leads to arc ignition failure

Even if the operator turns the turbine or the threaded handle to raise the arc rod, it cannot keep it at a proper distance from the charge. If the distance is too small, the tungsten needle will easily react with the molten metal, thereby polluting the material. If the distance is too large, it will easily cause Melting failure due to arc interruption

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