阅读说明：本技术 一种利用再生铝加工制备高强度铝合金门窗的方法 (Method for processing and preparing high-strength aluminum alloy door and window by using secondary aluminum ) 是由 郭世龙 郭启军 于 2020-07-22 设计创作，主要内容包括：本发明涉及废铝回收利用技术领域,公开了一种利用再生铝加工制备高强度铝合金门窗的方法,以废旧铝为原料代替部分纯铝,添加其它合金元素,加工制备得到的再生铝锭进一步挤压成型加工为铝合金门窗,制备得到的再生铝锭在机械性能上均优于市场上广泛使用的铝合金,抗拉强度达320MPa以上,伸长率达到15%以上,延伸强度达到228MPa以上；并且降低了价格成本；本发明通过采用半连续式铸造工艺加工得到铝合金门窗,添加的废铝成分高,却能够生产出性能优异的铝合金门窗,提高了废铝的可再生利用率,降低了生产成本,解决铝行业结构不合理,再生铝产业发展落后的问题。(The invention relates to the technical field of waste aluminum recycling, and discloses a method for preparing a high-strength aluminum alloy door and window by using recycled aluminum, wherein waste aluminum is used as a raw material to replace part of pure aluminum, other alloy elements are added, and a recycled aluminum ingot obtained by processing and preparation is further extruded and molded into the aluminum alloy door and window, the mechanical property of the prepared recycled aluminum ingot is superior to that of aluminum alloy widely used in the market, the tensile strength reaches more than 320MPa, the elongation reaches more than 15%, and the elongation strength reaches more than 228 MPa; and the price cost is reduced; according to the invention, the aluminum alloy door and window is obtained by adopting the semi-continuous casting process, the added waste aluminum has high content, but the aluminum alloy door and window with excellent performance can be produced, the renewable utilization rate of the waste aluminum is improved, the production cost is reduced, and the problems that the structure of the aluminum industry is unreasonable and the development of the secondary aluminum industry is lagged are solved.)

1. A method for processing and preparing a high-strength aluminum alloy door and window by using secondary aluminum is characterized by comprising the following steps:

(1) the ingredients are as follows by mass percent: 36-39% of waste aluminum, 3.4-3.8% of industrial silicon powder, 0.6-0.8% of metal magnesium powder, 0.2-0.3% of metal copper powder, 0.0027-0.0031% of metal composite rare earth modifier and the balance of pure aluminum ingot;

(2) cleaning, decontaminating and impurity-removing waste aluminum, cutting the waste aluminum into small blocks, remelting the small blocks in a smelting furnace heated to 780-800 ℃, adding a deslagging agent accounting for 0.17-0.19 percent of the mass of a molten material after the waste aluminum blocks are completely molten, deslagging, and casting the slag into ingots to obtain recycled aluminum ingots;

(3) adding a pure aluminum ingot during smelting, adding the recovered aluminum ingot after the pure aluminum ingot is completely smelted, regulating the temperature of the recovered aluminum ingot to 800 ℃ after the recovered aluminum ingot is smelted, sequentially adding magnesium metal powder, copper metal powder and industrial silicon powder, stirring and smelting for 35-45 minutes, then adding a metal composite rare earth modifier, introducing multi-component mixed gas for refining, controlling the ventilation time to be 60-70 minutes, controlling the flow to be 1.3-1.5 cubic meters per minute, adding 0.13-0.16% of a deslagging agent for deslagging, pouring after deslagging and stirring uniformly, pouring a melt into a crystallizer, and uniformly pouring into a regenerated aluminum ingot;

(4) and (3) feeding the regenerated aluminum ingot prepared in the step (3) into a mold for profile extrusion, wherein the heating temperature of the mold is 480-.

2. The method for preparing the high-strength aluminum alloy doors and windows by using the recycled aluminum in the claim 1, wherein the waste aluminum in the step (1) is one or more of aluminum waste hubs and waste doors and windows.

3. The method for preparing the high-strength aluminum alloy door and window by using the recycled aluminum in the claim 1, wherein the metal composite rare earth modifier in the step (1) comprises the following elements in percentage by mass: 25-30% of manganese, 10-18% of gallium, 10-14% of neodymium, 8-11% of holmium, 10-12% of yttrium, 5-9% of scandium and the balance of cerium.

4. The method for manufacturing the high-strength aluminum alloy door and window by using the recycled aluminum as claimed in claim 1, wherein the slag removing agent is prepared from the following components in parts by weight: 16-22 parts of sodium chloride, 12-18 parts of magnesium chloride, 7-10 parts of potassium chloride, 4-6 parts of sodium hexafluoroaluminate and 4-8 parts of calcium fluoride.

5. The method for manufacturing high-strength aluminum alloy doors and windows by using recycled aluminum in the processing of claim 1, wherein in the step (3), the recycled aluminum ingot is smelted, the multi-component mixed gas is a mixed gas of nitrogen and argon, and the volume ratio of the nitrogen to the argon is 2.8-3.0: 1.4-1.5.

6. The method for preparing the high-strength aluminum alloy door and window by using the recycled aluminum in the claim 1, wherein the aging treatment time in the step (4) is 3-5 hours.

Technical Field

The invention belongs to the technical field of waste aluminum recycling, and particularly relates to a method for processing and preparing a high-strength aluminum alloy door and window by using secondary aluminum.

Background

The waste aluminum is used as a renewable resource, and the recycling and the reutilization of the waste aluminum have important significance for improving the economic benefit and the social benefit. With the development of economy, the status and the function of aluminum and aluminum alloy in national economy are second to steel, and the dosage and the range of the aluminum and the aluminum alloy are increasingly expanded. The raw aluminum can not meet the social needs, on one hand, the bauxite is exhausted day by day, and on the other hand, the smelting of the aluminum consumes a large amount of energy, which aggravates the energy crisis. Therefore, it is particularly important to effectively recycle and utilize various scrap materials and scrap parts in the aluminum processing industry. On the other hand, a large amount of energy is consumed in the process of smelting new aluminum, and the energy consumption for melting waste aluminum is very low and is only about 5 percent of that of electrolytic aluminum; the aluminum is a metal with strong corrosion resistance, the corrosion loss is less, the real yield is quite high when the waste aluminum is remelted, the recovery value is high, and the aluminum can be recycled for infinite times. The technology of scrap aluminum regeneration is more and more emphasized based on the urgent needs of resource, environment and economic development.

The aluminum has the excellent characteristics of light weight, corrosion resistance and repeated recycling, and the recycling of the secondary aluminum has important significance for the protection of aluminum resources and the upgrading of industrial structures.

Disclosure of Invention

The invention aims to solve the existing problems and provides a method for preparing a high-strength aluminum alloy door and window by using recycled aluminum, wherein the recycled aluminum is used for preparing the high-strength aluminum alloy door and window, so that the recycled aluminum industry is better developed and utilized.

The invention is realized by the following technical scheme:

a method for processing and preparing a high-strength aluminum alloy door and window by using secondary aluminum is realized by the following preparation process flow:

preparing materials: according to the mass percentage: 36-39% of waste aluminum, 3.4-3.8% of industrial silicon powder, 0.6-0.8% of metal magnesium powder, 0.2-0.3% of metal copper powder, 0.0027-0.0031% of metal composite rare earth modifier and the balance of pure aluminum ingot.

The waste aluminum is one or more of aluminum waste hubs and waste doors and windows.

The metal composite rare earth modifier comprises the following element components in percentage by mass: 25-30% of manganese, 10-18% of gallium, 10-14% of neodymium, 8-11% of holmium, 10-12% of yttrium, 5-9% of scandium and the balance of cerium.

The preparation method comprises the following steps:

(1) cleaning, decontaminating and impurity-removing waste aluminum, cutting the waste aluminum into small blocks, remelting the small blocks in a smelting furnace heated to 780-800 ℃, adding a deslagging agent accounting for 0.17-0.19 percent of the mass of a molten material after the waste aluminum blocks are completely molten, deslagging, and casting the slag into ingots to obtain recycled aluminum ingots;

(2) adding a pure aluminum ingot during smelting, adding the recovered aluminum ingot after the pure aluminum ingot is completely smelted, regulating the temperature of the recovered aluminum ingot to 800 ℃ after the recovered aluminum ingot is smelted, sequentially adding magnesium metal powder, copper metal powder and industrial silicon powder, stirring and smelting for 35-45 minutes, then adding a metal composite rare earth modifier, introducing multi-component mixed gas for refining, controlling the ventilation time to be 60-70 minutes, controlling the flow to be 1.3-1.5 cubic meters per minute, adding 0.13-0.16% of a deslagging agent for deslagging, pouring after deslagging and stirring uniformly, pouring a melt into a crystallizer, and uniformly pouring into a regenerated aluminum ingot;

(3) sending the prepared regenerated aluminum ingot into a mold for profile extrusion, wherein the heating temperature of the mold is 480-510 ℃, the temperature of an extrusion cylinder is 440-450 ℃, the heat preservation time is 1.8-2.0 hours, the extrusion is carried out under 230-240MPa, the extrusion speed is controlled at 10.2-10.6 m/min, the temperature is reduced to 320-340 ℃ after extrusion forming, the heat preservation time is 1-2 hours, the aging treatment is carried out at 150-160 ℃, and the aging treatment time is 3-5 hours.

The slag remover is prepared from the following components in parts by weight: 16-22 parts of sodium chloride, 12-18 parts of magnesium chloride, 7-10 parts of potassium chloride, 4-6 parts of sodium hexafluoroaluminate and 4-8 parts of calcium fluoride.

During smelting of the regenerated aluminum ingot, the multi-element mixed gas is a mixed gas of nitrogen and argon, wherein the volume ratio of the nitrogen to the argon is 2.8-3.0: 1.4-1.5.

The waste aluminum impurity removal process comprises the step of removing impurities such as waste iron, dust, sand, oil stain, organic paint and the like in the waste aluminum.

Compared with the prior art, the invention has the following advantages: in order to solve the problem that the application performance of the existing waste aluminum in the actual production is poor, the invention provides a method for preparing a high-strength aluminum alloy door and window by utilizing the processing of the recycled aluminum, the waste aluminum is used as a raw material to replace part of pure aluminum, other alloy elements are added, the processed and prepared recycled aluminum ingot is further extruded and molded into the aluminum alloy door and window, the mechanical properties of the prepared recycled aluminum ingot are superior to those of aluminum alloy widely used in the market, the tensile strength reaches more than 320MPa, the elongation reaches more than 15%, and the elongation strength reaches more than 228 MPa; and the price cost is reduced; according to the invention, the aluminum alloy door and window is obtained by adopting the semi-continuous casting process, the added waste aluminum has high content, but the aluminum alloy door and window with excellent performance can be produced, the renewable utilization rate of the waste aluminum is improved, the production cost is reduced, and the problems that the structure of the aluminum industry is unreasonable and the development of the secondary aluminum industry is lagged are solved; the invention realizes practical application through the research on the regeneration technology of the waste aluminum, is beneficial to the sustainable development of aluminum resources, solves the aluminum industry crisis in China, reduces the energy consumption and improves the economic benefit.

Detailed Description

The present invention will be further described with reference to the following specific examples.