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A kind of preparation method of aluminum-manganese series alloy

An aluminum-manganese and alloy technology is applied in the field of preparation of aluminum-manganese-based alloys, which can solve the problems of high impurity content of aluminum-manganese-based alloys, high energy consumption by carbothermal reduction method, and high equipment requirements, and achieve low impurity content and harmlessness. The effect of chemical treatment and solving pollution problems

Active Publication Date: 2020-11-20
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

However, due to the high content of impurities in the production of Al-Mn alloys by this method, the application of carbon electrothermal method to treat Al-Si-containing waste slag is limited.
[0005] At present, the methods for preparing aluminum-manganese 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 manganese and aluminum, and then put it into the reaction furnace for high temperature. Smelting reduction, this method is not only complicated in process, 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-manganese series alloy
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preparation example Construction

[0025] In view of the reuse of aluminum-silicon overhaul slag in the prior art, this application provides a method for preparing an aluminum-manganese alloy. The aluminum-manganese alloy prepared by electrolysis has 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-manganese alloy is a high-value product, which has good feasibility and economy. Specifically, the preparation method of the aluminum-manganese alloy provided by the pres...

Embodiment 1

[0045] 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 manganese-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%, the content of silicon is 12.41wt%, the content of manganese in manganese-rich slag is 25wt%; 5wt% of the mass of the mixture, the quality of the manganese-rich slag is 10wt% of the mass of the mixture, and the rest is alumina;

[0046] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.018V, the current efficiency is 93.3%, and the electrolysis temperature is 910°C. The electrolyte includes: magnesium fluoride 3.345wt%, lithium fluoride 2.524wt%, Calcium Fluoride 5.423wt%, Potassium Fluoride 2.356wt%, Aluminum Oxide 3.261wt%...

Embodiment 2

[0048] 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 manganese-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%, the content of silicon is 12.41wt%, the content of manganese in manganese-rich slag is 25wt%; It is 20wt% of the mass of the mixture, the quality of manganese-rich slag is 10wt% of the mass of the mixture, and the rest is alumina;

[0049] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.095V, the electrolysis temperature is 922°C, and the current efficiency is 90.2%. The electrolyte includes: magnesium fluoride 2.956wt%, lithium fluoride 1.986wt%, Calcium Fluoride 4.623wt%, Potassium Fluoride 1.946wt%, Aluminum Oxide 2.95w...

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Abstract

The invention provides a preparation method of an aluminum-manganese alloy. The preparation method comprises the following steps: A) aluminum-siliceous overhauling slags are crushed to obtain crushedmaterials, wherein the content of aluminum in the crushed materials is 15wt%-20wt%, and the content of iron is less than or equal to 5wt%; and B) after a manganese-rich source, aluminum oxide and thecrushed materials are mixed into an electrolytic cell for electrolysis, the aluminum-manganese alloy is obtained, wherein the superheat degree of the electrolysis electrolyte is 9 DEG C-13 DEG C. According to the preparation method, the aluminum-manganese alloy is prepared by using an electrolysis method, the aluminum-manganese alloy with more stable chemical properties and higher purity is obtained, and the aluminum-manganese alloy is prepared by using overhauling slag solid wastes which are harmful to the environment generated by the electrolytic aluminum industry, so that not only is the environmental problem of solid waste stacking solved, but also the solid wastes are reused, and the direct economic value is brought.

Description

technical field [0001] The invention relates to the technical field of reutilization of aluminum-silicon overhaul slag, in particular to a method for preparing an aluminum-manganese 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 ...

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王教儒冯源孙盛林
Owner CENT SOUTH UNIV
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