Smelting furnace

Abstract

The invention relates to a smelting furnace which comprises a melting furnace (1) and an insulating furnace (2) which are mutually communicated, wherein the melting furnace (1) is provided with a material inlet (15), and the insulating furnace (2) is provided with a molten liquid output port (22). The smelting furnace is characterized in that the melting furnace (1) is divided into a melting cavity (11) and a filter cavity (12) through a furnace wall (3); the furnace wall (3) is provided with a channel (31) which communicates the melting cavity (11) with the filter cavity (12); and the insulating furnace (2) is communicated with the filter cavity (12) through a through cavity (4). Compared with the prior art, the smelting furnace adopts the structure that the furnace wall divides the melting furnace into the melting cavity and the filter cavity, the furnace wall is provided with the channel which communicates the melting cavity with the filter cavity, therefore, the insulating furnaceis communicated with the filter cavity through a through cavity. The structure of the smelting furnace is beneficial to impurities generated in a process of melting cathode copper to float on the surface of copper liquid, and guarantees the copper liquid which is circulated among the filter cavity, a melting groove and the insulating furnace to be pure, thereby having the effects of insulating the impurities and effectively reducing the oxygen content of the copper liquid; and the impurities floating on the surface of the copper liquid can be fished out by removing a cover plate above the filter cavity.

Description

technical field [0001] The invention relates to a metal smelting device, in particular to a smelting furnace for oxygen-free copper smelting Background technique [0002] Copper used in electric vacuum equipment has strict requirements on oxygen content, which directly affects the conductivity of oxygen-free copper products and the life of end products. At present, the oxygen content of high-end products requires less than 5ppm. For example, the higher the conductivity of the radio frequency cable tube, the more the performance of the cable can be improved. Generally, TP tubes produced by copper tubes contain phosphorus and have high resistivity, so they cannot be used to produce electric vacuum equipment. [0003] Ordinary casting and rolling process cannot produce suitable pipes. Traditional oxygen-free copper is produced by vacuum melting and extrusion. In the production process of oxygen-free copper rods and pipes, the level of oxygen content has a great impact on pr...

AI Technical Summary

Problems solved by technology

But its disadvantage is that there is no filter chamber in the melting furnace, which is not conducive to the impurities generated during the melting process of cathode copper floating on the surface of the copper liquid, and the impurities on the surface cannot be isolated, so that the purity of the copper liquid circulating between the melting channel and the holding furnace is not high. Reduce the quality of copper liquid

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