Scrap copper refining process

A waste miscellaneous copper and process technology, which is applied in the direction of photographic process, photographic auxiliary process, process efficiency improvement, etc., can solve the problems of polluted air, recycled copper with low purity waste gas, etc., to reduce pollution, improve purity, and increase reuse rate Effect

Inactive Publication Date: 2021-06-22
邱小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this disclosure is to provide a waste miscellaneous copper refining process, which solves the problems of low purity of recovered copper and air pollution caused by waste gas in the recovery process in related technologies, and can further reduce the impact of lead and sulfide in the waste gas on the air in the process of recycling waste copper. Pollution, as well as improve the purity of recycled copper, improve the reuse rate of copper

Method used

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  • Scrap copper refining process
  • Scrap copper refining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The scrap copper wire wrapped in plastic is crushed into granular scrap copper to be refined through a crusher.

[0047] Microwave heating is performed on the granular waste copper to be refined, so that the waste plastic in the granular waste copper to be refined shrinks under the action of microwaves, wherein the heating time of the microwave heating is 50 minutes, and the microwave heating The heating temperature is 450 degrees Celsius;

[0048] Put the granular scrap copper to be refined after the microwave heating into a jig for flotation, so that the heavier scrap copper particles are separated from the lighter plastic particles to obtain scrap copper particles. The jig Install a filter screen with a filter hole diameter less than or equal to 30mm in order to obtain granular copper with a particle diameter less than or equal to 30mm;

[0049] Put the scrap copper particles into the smelting furnace to heat and oxidize and refine to obtain copper oxide, and introd...

Embodiment 2

[0056] The scrap copper wire wrapped in plastic is crushed into granular scrap copper to be refined through a crusher.

[0057] Microwave heating is performed on the granular waste copper to be refined, so that the waste plastic in the granular waste copper to be refined shrinks under the action of microwaves, wherein the heating time of the microwave heating is 60 minutes, and the microwave heating The heating temperature is 600 degrees Celsius;

[0058] Put the granular scrap copper to be refined after the microwave heating into a jig for flotation, so that the heavier scrap copper particles are separated from the lighter plastic particles to obtain scrap copper particles. The jig Install a filter screen with a filter hole diameter less than or equal to 30mm in order to obtain granular copper with a particle diameter less than or equal to 30mm;

[0059] Put the scrap copper particles into the smelting furnace to heat and oxidize and refine to obtain copper oxide, and introd...

Embodiment 3

[0066] The scrap copper wire wrapped in plastic is crushed into granular scrap copper to be refined through a crusher.

[0067] Microwave heating is carried out on the granular waste miscellaneous copper to be refined, so that the waste plastic in the granular waste miscellaneous copper to be refined shrinks under the action of microwaves, wherein, the heating time of the microwave heating is 50 minutes, and the microwave heating The heating temperature is 500 degrees Celsius;

[0068] Put the granular scrap copper to be refined after the microwave heating into a jig for flotation, so that the heavier scrap copper particles are separated from the lighter plastic particles to obtain scrap copper particles. The jig Install a filter screen with a filter hole diameter less than or equal to 30mm in order to obtain granular copper with a particle diameter less than or equal to 30mm;

[0069] Put the scrap copper particles into the smelting furnace to heat and oxidize and refine to ...

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Abstract

The invention relates to a scrap copper refining process, and relates to the technical field of metal recycle. The scrap copper refining process aims to solve the problems of low purity of recycled copper and air pollution caused by waste gas in the recycle process in the related art. The scrap copper refining process comprises the steps that gaseous lead is converted into lead dust after encountering oxygen through oxygen in the waste gas so as to recycle the lead dust, and an alkali liquor is sprayed into an exhaust port passing through the oxygen, so that sulfide reacts with the alkali liquor to remove sulfur in the exhausted gas; and copper oxide passes through a mixture of ammonium hydroxide and ammonium bicarbonate to be mixed, a mixed liquid is electrolyzed, and electrolyzed copper is subjected to zinc replacement so as to obtain high-purity recycled copper. The pollution of lead and sulfide in the waste gas to air is reduced on the basis of the introduction of oxygen into the waste gas and the spraying of the alkali liquor, and the purity of the recycled copper is improved on the basis of the mixture of ammonium hydroxide and ammonium bicarbonate, electrolysis operation, replacement operation and the like.

Description

technical field [0001] The present disclosure relates to the technical field of metal recycling, and in particular, to a process for refining scrap copper. Background technique [0002] In life and industry, some scrap copper is often produced due to the scrapping of certain electronic products. For example, in scrapped transformers, there are coil copper wires used as transformer coils, and for example, there are red copper in scrapped wires and batteries. Silk. The recycling of these scrap copper can effectively promote the reuse of copper. However, in addition to containing a large amount of metallic copper, it also contains a certain amount of impurities such as iron, aluminum, sand, and oil. Because it is difficult to deal with this kind of scrap copper, most of the scrap copper is processed in a simple way at present and then sold out, which will not only cause some pollution to the environment, but also make the comprehensive utilization efficiency of the resources ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B15/00C25C1/12C22B13/02
CPCC22B7/001C22B1/005C22B15/003C25C1/12C22B13/025Y02P10/20
Inventor 邱小华
Owner 邱小华
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