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Production method of high-strength high-roughness secondary aluminum

A production method, high-strength and high-toughness technology, applied in the direction of improving process efficiency, can solve the problems of effective iron removal, deterioration and refinement, and inability to refine aluminum alloys, and achieves reduction of gas content, improvement of accuracy, and tensile strength. Strength-enhancing effect

Inactive Publication Date: 2014-05-28
南通曼特威金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of high-strength and high-toughness recycled aluminum, which solves the problem that aluminum alloy cannot be refined, deteriorated and refined, and iron can be effectively removed in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Before putting into the charge, the mass ratio of 0.6wt% is 3.5% of rare earth compound; 45% of sodium chloride; 45% of potassium chloride; 5% of sodium fluoroaluminate; Put 20-30% of the amount into the melting furnace, and send the 100% aluminum alloy raw material screened by flotation technology into the melting furnace through the conveyor belt, and use the conventional low-temperature reflection and low-temperature direct heat transfer technology to heat up and melt. The raw material is smelted at 680°C for 3.5 hours. After the recycled aluminum material is completely melted, the remaining 70-80% of the total amount of flux is evenly sprinkled on the surface of the melt to form an aluminum melt, and then the aluminum melt Carry out casting into an aluminum ingot mold, and within 30 seconds after the casting is completed, the aluminum ingot mold is directly immersed in a water pool under the casting port for cooling treatment. The cooling time is 6 minutes, and the c...

Embodiment 2

[0014] Before putting into the charge, the mass proportion of 0.6wt% is 4.3% of rare earth compound; 45% of sodium chloride; 45% of potassium chloride; 5% of sodium fluoroaluminate; Put 20-30% of the amount into the melting furnace, and send the 100% aluminum alloy raw material screened by flotation technology into the melting furnace through the conveyor belt, and use the conventional low-temperature reflection and low-temperature direct heat transfer technology to heat up and melt. The raw material is smelted at 710°C for 3.2 hours; after the secondary aluminum material is completely melted, the remaining 70-80% of the total amount of flux is evenly sprinkled on the surface of the melt to form an aluminum melt, and then the aluminum melt Carry out casting into an aluminum ingot mold, within 30 seconds after the casting is completed, the aluminum ingot mold is directly immersed in a water pool under the casting port for cooling treatment, the cooling time is 6 minutes, and the...

Embodiment 3

[0016] Before putting into the charge, the mass proportion of 0.6wt% is 3% of rare earth compound; 45% of sodium chloride; 45% of potassium chloride; 5% of sodium fluoroaluminate; Put 20-30% of the amount into the melting furnace, and send the 100% aluminum alloy raw material screened by flotation technology into the melting furnace through the conveyor belt, and use the conventional low-temperature reflection and low-temperature direct heat transfer technology to heat up and melt. The raw material is smelted at 695°C for 3.8 hours; after the recycled aluminum material is completely melted, the remaining 70-80% of the total amount of flux is evenly sprinkled on the surface of the melt to form an aluminum melt, and then the aluminum melt Carry out casting into an aluminum ingot mold, and within 30 seconds after the casting is completed, the aluminum ingot mold is directly immersed in a water pool under the casting port for cooling treatment, the cooling time is 6 minutes, and th...

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Abstract

The invention discloses a production method of high-strength high-roughness secondary aluminum. The production method comprises four steps: a floatation pretreatment, a low-temperature rapid melting treatment, a multifunctional composite purifying treatment, and a soaking-type rapid cooling treatment; the floatation pretreatment improves the ratio accuracy of raw materials and ensures the quality of raw materials; the low-temperature rapid melting process effectively control the generation of hydrogen gas and harmful impurities during the smelting process; a multifunctional composite flux has effective covering, modifying, refining, and iron-removing effects on the secondary aluminum purification, modification, and refinement processes; and the soaking-type rapid cooling technology effectively reduces the gas-absorbing amount of aluminum alloy liquid during the casting process. The tensile strength of the secondary aluminum alloy ingot produced by the method is increased by 10% to 15%, and the elongation rate is increased by 30% to 50%.

Description

technical field [0001] The invention relates to a production method of high-strength and high-toughness recycled aluminum, in particular to a production method for obtaining high-strength and high-toughness recycled aluminum through flux purification treatment. Background technique [0002] The original production process of recycled aluminum alloy ingots is simple, that is, after the waste aluminum is selected, it is put into the melting furnace for melting. The main components of the aluminum alloy are smelted and adjusted according to the requirements. If some components are insufficient, only some metal elements are added. Or if some metal elements are too much, adding primary aluminum for dilution does not require pre-component control, and most products do not require refining and purification processes, so the quality of recycled aluminum alloy ingots is not high. [0003] The original method to improve the quality of recycled aluminum alloy ingots is mechanical metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B9/10C22C1/06
CPCY02P10/20
Inventor 蒋志萍纪建倪红军姚蕴辉
Owner 南通曼特威金属材料有限公司
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