Preparation method of aluminum-silicon-titanium alloy

A technology of titanium alloy and aluminum-silicon, which is applied in the field of preparation of aluminum-silicon-titanium alloy, can solve the problems of high equipment requirements, high energy consumption of carbothermal reduction method, complicated process, etc., achieve low impurity content, realize harmless treatment, The effect of high purity

Inactive Publication Date: 2020-02-28
CENT SOUTH UNIV
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Problems solved by technology

[0006] At present, the methods for preparing Al-Si-Ti alloys mainly include smelting reduction method and carbothermal reduction method. The smelting reduction method needs to mix titanium-containing slag, carbon, metal aluminum, iron, and magnesium evenly, and then put them into the reac

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  • Preparation method of aluminum-silicon-titanium alloy
  • Preparation method of aluminum-silicon-titanium 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-silicon-titanium alloy. The aluminum-silicon-titanium 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-silicon-titanium alloy is a high-value product, which has good feasibility and economy. Specifically, the preparation method of the aluminum-silicon-titaniu...

Embodiment 1

[0043] 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 silicon-titanium-alumina in a certain proportion, because the aluminum-silicon overhaul slag The content of Ti (1.5%) in it is relatively low, and it is necessary to add titanium-containing slag (Ti content is 20%) to obtain a mixture; the content of aluminum in the pulverized material is 16.2wt%, and the content of silicon is 12.41wt%. The content is 1.5wt%; the mass of aluminum and silicon solid waste in the mixture is 10wt% of the mass of the mixture, the quality of titanium-containing slag is 10wt% of the mass of the mixture, and the rest is silicon titanium alumina;

[0044] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.03V, the current efficiency is 93.2%, and the electrolysis temperature is 911°C. The el...

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 silicon-titanium-alumina in a certain proportion, because the aluminum-silicon overhaul slag The content of Ti (1.5%) in it is relatively low, and it is necessary to add titanium-containing slag (Ti content is 20%) to obtain a mixture; the content of aluminum in the pulverized material is 16.2wt%, and the content of silicon is 12.41wt%. The content is 1.5wt%; the mass of aluminum-silicon solid waste in the mixture is 20wt% of the mass of the mixture, the quality of titanium-containing slag is 10wt% of the mass of the mixture, and the rest is silicon-titanium-alumina;

[0047] Add the above mixture into the electrolytic cell for electrolysis. The working voltage of the electrolytic cell is 4.08V, the electrolysis temperature is 923°C, and the current efficiency is 90.2%. The electr...

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Abstract

The invention provides a preparation method of an aluminum-silicon-titanium alloy. The preparation method comprises the following steps that (A) aluminum silicon overhaul slags are crushed to obtain crushed materials, in the crushed materials, the aluminum content is 15 wt% to 20 wt%, the silicon content is 10-15 wt%, the iron content is less than or equal to 5 wt%, and the titanium content is 1-3wt%; and (B) slags containing titanium, silicon-titanium alumina and the crushed materials are mixed into an electrolytic cell for electrolysis to obtain the aluminum-silicon-titanium alloy, and theelectrolyte superheat degree of electrolysis is 12-16 DEG C. According to the preparation method, the aluminum-silicon-titanium alloy is prepared by using an electrolytic method, the aluminum-silicon-titanium alloy with more stable chemical property and higher purity is obtained, the aluminum-silicon-titanium alloy is prepared by using the overhaul slag solid wastes harmful to the environment andproduced by electrolytic aluminum industry, the environmental problem of solid waste storage is solved, the solid wastes can be reused, and 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 preparation method of an aluminum-silicon-titanium 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 pro...

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Application Information

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IPC IPC(8): C25C3/36C22C21/02C22C30/00C22B1/00C22B21/00C22B34/12
CPCC22B1/005C22B21/0007C22B34/12C22C21/02C22C30/00C25C3/36
Inventor 李贺松侯文渊崔同尧孙盛林王教儒冯源
Owner CENT SOUTH UNIV
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