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A method for preparing high-performance iron-rich recycled aluminum with trace compound additives

A composite additive and recycled aluminum technology, which is applied in the field of recycled aluminum material preparation, can solve the problems of lower mechanical properties of cast aluminum-silicon alloys, achieve the effects of easy control of components, simple process and improved performance

Active Publication Date: 2018-11-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the recovery and reuse of aluminum resources, due to repeated smelting or contact with iron-containing parts during recycling, the content of Fe and Si after melting waste aluminum is high; and in high-iron aluminum-silicon alloys, coarse flaky β-iron phases will be formed Splitting the structure greatly reduces the mechanical properties of the cast aluminum-silicon alloy

Method used

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  • A method for preparing high-performance iron-rich recycled aluminum with trace compound additives
  • A method for preparing high-performance iron-rich recycled aluminum with trace compound additives
  • A method for preparing high-performance iron-rich recycled aluminum with trace compound additives

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing high-performance iron-rich recycled aluminum with a small amount of compound additives, the operation steps are as follows:

[0027] The method uses equipment and tools: the heating equipment is a crucible resistance furnace, an oven, the machining equipment is a lathe, a mechanical grinder, and other tools include a slag removal tool, a bell jar, a stirring tool and a metal mold.

[0028] The composition of the iron-rich recycled aluminum to be processed by the method is Si: 10.5%, Cu: 1.5%, Fe: 1.3%, and the balance is aluminum. The refining agent used is C 2 Cl 6 .

[0029] 1. Preparation of trace compound additives

[0030] Weighing by weight percentage, Al-5Ti-0.5C: 5%, Al-10Mn: 55%, Al-10Sr: 25%, Al-10Ce: 15% are mixed uniformly to prepare a trace compound additive for future use.

[0031] 2. Put the iron-rich recycled aluminum alloy chips to be processed into a graphite crucible, heat it to 750°C in a crucible resistance furnace to me...

Embodiment 2

[0034] The method for preparing high-performance iron-rich recycled aluminum with a small amount of compound additives, the operation steps are as follows:

[0035] The equipment and tool used in this method: with embodiment 1.

[0036] The components of the iron-rich recycled aluminum to be processed by the method are Si: 12.0%, Cu: 3.0%, Fe: 2.0%, and the balance is aluminum. The refining agent used is C 2 Cl 6 .

[0037] 1. Preparation of trace composite additives; weighed by weight percentage, Al-5Ti-0.5C: 13%, Al-10Mn: 52%, Al-10Sr: 22%, Al-10Ce: 13%, mixed evenly to prepare a trace composite additive spare.

[0038] 2. Put the iron-rich recycled aluminum alloy chips to be processed into the graphite crucible, heat it in the crucible resistance furnace to 753°C and melt it into a melt. After it is completely melted, add refining agent C after keeping it warm for 10 minutes 2 Cl 6 Refining is carried out, and the surface scum is removed after refining. Obtain recycl...

Embodiment 3

[0041] The method for preparing high-performance iron-rich recycled aluminum with a small amount of compound additives, the operation steps are as follows:

[0042] The equipment and tool used in this method: with embodiment 1.

[0043]The composition of the iron-rich recycled aluminum to be processed by the method is Si: 11.0%, Cu: 2.5%, Fe: 1.8%, and the balance is aluminum. The refining agent used is C 2 Cl 6 .

[0044] 1. Prepare trace composite additives; by weight percentage, Al-5Ti-0.5C: 27%, Al-10Mn: 55%, Al-10Sr: 9%, Al-10Ce: 9%, mix uniformly to prepare trace composite additives for later use.

[0045] 2. Put the iron-rich recycled aluminum alloy chips to be processed into a graphite crucible, heat it to 750°C in a crucible resistance furnace to melt into a melt, and add refining agent C after it is completely melted and kept warm for 20 minutes 2 Cl 6 Refining is carried out, and the surface scum is removed after refining. Obtain recycled aluminum melt.

[00...

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Abstract

The invention relates to a method for preparing high-performance rich-iron secondary aluminium through a trace of a composite additive. The method comprises the steps of preparation of the composite additive, ingredient melting, grain refinement treatment, refining, modification treatment and casting. The method is characterized in that Al-5Ti-0.5C, Al-10Mn, Al-10Sr and Al-10Ce intermediate alloys are prepared into alloy chips through machining, the alloy chips are prepared into particles of certain size through mechanical grinding, and the trace of the composite additive is formed through reasonably selecting the particle compound proportion; and after preheating, the composite additive is added into rich-iron secondary aluminium melt, and the high-performance rich-iron secondary aluminium is obtained. According to the invention, the method has a good grain refinement effect, the mechanical property of the rich-iron secondary aluminium is greatly improved, the melt treatment technology is simplified, and the additive is convenient to prepare, easy to store, easy to control and free of pollutant precipitation.

Description

technical field [0001] The invention belongs to the field of regenerated aluminum material preparation, in particular to a method for preparing high-performance iron-rich regenerated aluminum with a trace amount of composite additives. Background technique [0002] Cast aluminum alloy has the characteristics of low density and high strength, and is widely used in aviation, machinery, automobile and other fields. With the increasing shortage of primary aluminum resources, people reuse the recycled aluminum and recycle it into the casting aluminum alloy system. In the recovery and reuse of aluminum resources, due to repeated smelting or contact with iron-containing parts during recycling, the content of Fe and Si after melting waste aluminum is high; and in high-iron aluminum-silicon alloys, coarse flaky β-iron phases will be formed The mechanical properties of the cast aluminum-silicon alloy are greatly reduced by splitting the structure. [0003] Adding trace elements to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/02
CPCC22C1/026C22C1/03C22C21/02
Inventor 唐鹏赵艳君胡治流蒋长标曾建民李逸泰周成云
Owner GUANGXI UNIV
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