High-temperature reinforcing refining method of copper-bearing multi-metal material

Abstract

The invention relates to a high-temperature reinforcing refining method of copper-bearing multi-metal material, in particular to carbon-bearing and copper-bearing material generated after processing adiscarded circuit board and other copper-bearing secondary material. The high-temperature reinforcing refining method comprises the following steps: S1, the oxidation impurity removal stage: puttingcarbon-bearing and copper-bearing multi-metal material in a high-temperature reinforcing refining furnace, and jetting oxygen-enrichement gas as an oxidizing agent, wherein caron in the material serves as fuel and is supplemented by natural gas to keep the temperature in the furnace high, and matching a slag former to realize slagging and removal of impurity elements in the material; and S2, the reduction refining stage: adding a reductant, oxygen-enrichement gas and natural gas in the furnace to carry out reduction refining on crude copper to generate qualified anode copper finally and realize efficient enrichment of precious metal. According to the high-temperature reinforcing refining method, one-step refining of the copper-bearing multi-metal material is realized to directly generate anode copper, the technological vacancy of efficient recycling of copper-bearing multi-metal material is filled, and the advantages that the processes are continuous, economical and environmentally-friendly, short in flow and high in efficiency are realized.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, and in particular relates to a method for high-temperature intensified refining of copper-containing multi-metal materials. Background technique [0002] There are two sources of copper-containing polymetallic materials: (1) carbon-containing copper-containing solid polymetallic materials obtained after waste circuit boards are processed by low-temperature cracking, clean incineration, pyrolysis, etc.; (2) waste miscellaneous copper, including recycling Waste motors, waste hardware, waste copper wires, waste household appliances, etc., as well as wastes produced by non-ferrous metal processing enterprises such as copper shavings, residual anodes, and blister copper, and other copper-containing secondary wastes. [0003] The rapid development of the electronic industry has brought profound changes to human production and lifestyle, and at the same time produced a large amount of electron...

AI Technical Summary

Problems solved by technology

The existing scrap copper smelting usually adopts reverberatory furnace single furnace operation, which mainly relies on carbonaceous fuel to provide heat, and the energy consumption is high

However, the more advanced scrap copper smelting process, such as tilting furnace, caldo furnace and other smelting technology and equipment, has problems such as high introduction cost, complex structure, long smelting cycle, and small single-series smelting scale.

[0006] CN203976893U has announced a kind of unitary furnace copper smelting device, and this device body of furnace is a horizontal cylindrical shape, adopts the oxygen bottom blowing mode, refines and reclaims after preheating regenerated materials such as waste miscellaneous copper, liquid blister copper, this process device is more than traditional The smelting process has improved in terms of energy consumption, efficiency, and technical level, but it has high requirements on the copper content of the material and does not involve carbon-containing copper-containing polymetallic materials obtained after processing waste circuit boards.

CN101638724A discloses a process and equipment for refining scrap copper using nitrogen stirring and oxygen-enriched gas, which is called "NGL furnace" in the industry. This process is aimed at recycling scrap copper. After melting, oxygen-enriched gas with a concentration of 21-50% is used as the oxidant, and natural gas or liquefied petroleum gas is used as the reducing agent for redox. Nitrogen is used to stir the molten pool throughout the refining process. The production efficiency is high and the environmental protection effect is good. Large amount of flue gas, high energy consumption and does not involve the recovery of carbon-containing copper-containing polymetallic materials obtained after processing waste circuit boards

CN106086416A discloses a technical method of circuit board waste disposal. Blister rich in rare and precious metals is produced by smelting in an oxygen-enriched molten pool. The processing raw materials are relatively single, and the process operation requirements are relatively high

[0007] The above-mentioned methods are mostly multi-process coupling, and the process is long and belongs to intermittent operation. Therefore, it is urgent to study a short-process, low-cost, and process-continuous method for refining and recovering copper-containing multi-metal materials to meet actual needs.

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