Smelting process of low-grade scrap copper

Abstract

The invention discloses a smelting process of low-grade scrap copper. The process comprises the following steps: 1) generation of an initial molten pool; 2) a melting process, namely continuously adding auxiliary materials into a top blowing furnace, inserting a spray gun into melt, spraying oxygen-enriched air and fuel into the melt, carrying out submerged combustion and top-blown smelting, and stopping adding the auxiliary materials when the liquid level of the melt in a to-be-blown furnace is 0.3m to 0.5m higher than a bleed hole, repeatedly carrying out smelting and slagging operations after opening the bleed hole for slagging, and stopping charging and melting when the black copper melt surface inside the top blowing furnace ascends to the position which is 100mm to 200mm below the bleed hole; (3) a blowing process, namely exhausting slag inside the top blowing furnace, inserting the spray gun into black copper, and spraying the oxygen-enriched air and fuel to carry out submerged combustion and blowing, and respectively discharging the produced raw copper and blowing slag from a copper discharge hole and the bleed hole; and 4) repeating of the smelting and blowing processes. According to the technical scheme disclosed by the invention, the operation for smelting scrap copper is flexible, and the smelting process is strong in adaptability on raw materials, high in safety, and high in recovery rate of copper and valuable metal.

Description

technical field [0001] The invention relates to the technical field of copper smelting, in particular to a smelting process of low-grade scrap copper. Background technique [0002] my country is a country poor in copper mineral resources, but economic development has made my country the country with the largest consumption of refined copper in the world. In order to solve the contradiction between copper resources and demand, it has become an important direction for the development of my country's copper smelting industry to develop waste miscellaneous copper smelting technology and use copper renewable resources to produce refined copper. Usable copper recycling resources include high-grade copper-containing materials such as copper scraps, copper shavings, copper wires, waste cables, and waste copper parts, as well as waste motors, copper-containing alloy waste, copper-containing waste from automobile dismantling, and copper-containing industrial residues. , electronic wa...

AI Technical Summary

Problems solved by technology

[0004] 1) Since it is a fixed vertical metallurgical furnace, the belt conveyor can only be used to feed materials through the fixed feeding port on the furnace roof, and the shape and size of the processed materials are limited;

[0005] 2) Since it is a vertical furnace with a height of about 10m, directly adding large pieces of material will cause melt splashing, or damage the furnace lining, or even cause serious safety accidents, so it cannot handle large pieces of crude copper or other large pieces recycled materials;

[0007] 4) The boiler is vertical. When there is a water leakage failure, since the metallurgical furnace is fixed and cannot be tilted, water flows into the high-temperature furnace and seriously damages the refractory material.

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