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A kind of preparation method of aluminum-copper series alloy

An aluminum-copper and alloy technology, which is applied in the field of preparation of aluminum-copper alloys, can solve the problems of high energy consumption, high burning loss rate, energy waste, etc. by the carbothermic reduction method, and achieve harmless treatment, protection from anodic oxidation, The effect of reducing anode consumption

Active Publication Date: 2021-03-23
CENT SOUTH UNIV
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Problems solved by technology

However, due to the high content of impurities in the production of aluminum-copper alloys by this method, the application of carbon electrothermal method to treat aluminum-silicon-containing waste slag is limited.
[0005] At present, the methods for preparing aluminum-copper alloys mainly include smelting reduction method and carbothermal reduction method. The smelting reduction method needs to use chemical reagents to remove the oxide film on the powder surface from the mixed powder containing copper and aluminum, and then put it into the reaction furnace for high temperature. Smelting reduction, this method not only has complicated procedures, but also causes waste of energy, and has a high burning loss rate; carbothermal reduction method has high energy consumption and high requirements for equipment

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  • A kind of preparation method of aluminum-copper series alloy
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preparation example Construction

[0024] In view of the reuse of aluminum-silicon overhaul slag in the prior art, this application provides a method for preparing an aluminum-copper alloy, which uses an electrolytic method to prepare an aluminum-copper alloy with high purity, low impurity content, and chemical stability High, on the other hand, using the electrolytic cell in the aluminum electrolysis plant as the electrolysis reaction cell does not require excessive capital investment in equipment, and the electrolysis technology is mature, which solves the problem of fluoride and cyanide in the solid waste of overhaul slag in the aluminum electrolysis industry To solve the pollution problem, the harmless treatment, reduction treatment and resource treatment of the waste lining of the aluminum electrolytic cell have been realized, and the obtained aluminum-copper alloy is a high-value product, which has good feasibility and economy. Specifically, the preparation method of the aluminum-copper alloy provided by t...

Embodiment 1

[0043] Take the aluminum-silicon solid waste in the lining of the waste tank and grind it to obtain the solid waste crushed material with a particle size of ≤0.15mm; mix the ground crushed material with alumina powder, copper-rich slag powder, and chromium-containing waste residue in a certain proportion Mix to obtain a mixture; the content of aluminum in the pulverized material is 16.2wt%, the content of iron is 3.56wt%, and the content of copper in the copper-rich slag is 75wt%; the quality of the aluminum-silicon solid waste in the mixture is the quality of the mixture 5wt%, the quality of copper-rich slag is 10wt% of the mixture quality, the content of chromium-containing waste residue (chromium content is 85wt%) is 5wt% of the mixture quality, and all the other are alumina;

[0044] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.031V, the current efficiency is 91.3%, and the electrolysis temperature is 9...

Embodiment 2

[0046] Take the aluminum-silicon solid waste in the lining of the waste tank and grind it to obtain a solid waste crushed material with a particle size of ≤0.15mm; mix the ground crushed material with alumina powder and copper-rich slag powder in a certain proportion to obtain a mixed material; the content of aluminum in the pulverized material is 16.2wt%, the content of iron is 3.56wt%, and the content of copper in the copper-rich slag is 75wt%;; the quality of aluminum and silicon solid waste in the mixture is 20wt% of the mixture quality , the quality of copper-rich slag is 10wt% of the mixture quality, and the rest is alumina;

[0047] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.085V, the electrolysis temperature is 929°C, and the current efficiency is 91.2%. The electrolyte includes: magnesium fluoride 1.975wt%, lithium fluoride 2.213wt%, Calcium fluoride 4.963wt%, potassium fluoride 1.897wt%, alumin...

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Abstract

The invention provides a preparation method of an aluminum-copper alloy. The preparation method comprises the following steps that (A) aluminum-silicon-based overhaul slag is crushed, and a crushed material is obtained, wherein the content of aluminum in the crushed material is 15wt%-20wt%, and the content of iron in the crushed material is smaller than or equal to 5wt%; and (B) copper-rich slag,aluminum oxide and the crushed material are mixed and then enter an electrolytic cell to be electrolyzed, and the aluminum-copper alloy is obtained, wherein the superheat degree of an electrolyte forelectrolysis is 11-17 DEG C. According to the preparation method of the aluminum-copper alloy, the aluminum-copper alloy is prepared through an electrolysis method, the aluminum-copper alloy which ismore stable in chemical property and higher in purity is obtained through the method, the aluminum-copper alloy is prepared through overhaul slag solid waste which is generated in the electrolytic aluminum industry and is harmful to the environment, the environmental problem of solid waste stockpiling is solved, the solid waste is reused, and direct economic value is brought.

Description

technical field [0001] The invention relates to the technical field of recycling aluminum-silicon overhaul slag, in particular to a method for preparing an aluminum-copper alloy. Background technique [0002] my country is a big aluminum manufacturing country, and the output of alumina and electrolytic aluminum accounts for more than 40% of the world. High-quality bauxite resources are relatively scarce, which is far from meeting the development needs of my country's aluminum industry. More than 50% of bauxite needs to be imported, which seriously restricts the development of my country's aluminum industry. Therefore, actively exploring non-traditional aluminum minerals to produce metal aluminum and developing new aluminum smelting methods is of great significance for increasing the supply of domestic aluminum resources and promoting the sustainable development of the aluminum industry. [0003] With the continuous improvement of national environmental protection requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/36
CPCC25C3/36
Inventor 李贺松侯文渊崔同尧冯源王教儒孙盛林
Owner CENT SOUTH UNIV
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