Purifying method of aluminum alloy melt

A technology of aluminum alloy melt and aluminum alloy, which is applied in the field of aluminum alloy processing, can solve the problems of higher than 0.10ml/100g, achieve the effect of rapid homogenization temperature, good effect, and accelerate the floating of impurities

Inactive Publication Date: 2018-03-16
广西平果铝合金精密铸件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hydrogen content in the aluminum melt obtained by domestic Ar purification technology is ≥0.08ml / 100gAl. If the weather is humid and the process fluctuates during the production process, the hydrogen content may be higher than 0.10ml / 100gAl

Method used

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  • Purifying method of aluminum alloy melt

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Effect test

Embodiment 1

[0031] A method for purifying an aluminum alloy melt, comprising the following steps:

[0032] S1: Heat the aluminum alloy raw material in the crucible furnace to 730°C to make a melt;

[0033] S2: Turn on the switch of the movable rotating arm, make the rotating arm rotate and stir at a uniform speed in the aluminum alloy melt, and at the same time, pass N 2 , Cl 2 The mixed gas and refining agent are uniformly sprayed into the aluminum alloy melt through the jet ball and jet pipe of the rotating arm respectively, and at the same time, the scum on the surface of the aluminum alloy melt is removed; the N 2 , Cl 2 The ratio of mixed gas is N 2 : Cl 2 =1:0.05; the rotating arm rotates around the central axis, the rotation angle is 15 degrees, the rotating speed of the jet pipe is 80r / min, and the rotating speed of the jetting ball is 400r / min;

[0034] S3: After smelting the aluminum alloy melt for 18 minutes, let it stand for 25 minutes, then heat the melt to 730°C, and in...

Embodiment 2

[0038] A method for purifying an aluminum alloy melt, comprising the following steps:

[0039] S1: Heat the aluminum alloy raw material in the crucible furnace to 720°C to make a melt;

[0040] S2: Turn on the switch of the movable rotating arm, make the rotating arm rotate and stir at a uniform speed in the aluminum alloy melt, and at the same time, pass N 2 , Cl 2 The mixed gas and refining agent are uniformly sprayed into the aluminum alloy melt through the spray ball and the spray pipe of the rotating arm respectively, and at the same time, the scum on the surface of the aluminum alloy melt is removed; the N2 , Cl 2 The ratio of mixed gas is N 2 : Cl 2 =2:0.05; the rotating arm rotates around the central axis, the rotation angle is 30 degrees, the speed of the jet pipe is 70r / min, and the speed of the jet ball is 350r / min;

[0041] S3: After smelting the aluminum alloy melt for 15 minutes, let it stand for 20 minutes, then heat the melt to 720°C, and inject N into the ...

Embodiment 3

[0045] A method for purifying an aluminum alloy melt, comprising the following steps:

[0046] S1: Heat the aluminum alloy raw material in the crucible furnace to 740°C to make a melt;

[0047] S2: Turn on the switch of the movable rotating arm, make the rotating arm rotate and stir at a uniform speed in the aluminum alloy melt, and at the same time, pass N 2 , Cl 2 The mixed gas and refining agent are uniformly sprayed into the aluminum alloy melt through the jet ball and jet pipe of the rotating arm respectively, and at the same time, the scum on the surface of the aluminum alloy melt is removed; the N 2 , Cl 2 The ratio of mixed gas is N 2 : Cl 2 =1.5:0.05; the rotating arm rotates around the central axis, the rotation angle is 25 degrees, the speed of the jet pipe is 60r / min, and the speed of the jet ball is 300r / min;

[0048] S3: After smelting the aluminum alloy melt for 20 minutes, let it stand for 15 minutes, then heat the melt to 740°C, and inject N into the melt...

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Abstract

The invention discloses a purifying method of aluminum alloy melt, and belongs to the technical field of aluminum alloy machining. The purifying method of the aluminum alloy melt comprises the steps that aluminum alloy raw materials in a crucible melting furnace are heated to 720-740 DEG C to prepare the melt; a switch of a movable rotating arm is turned on, so that the rotating arm rotates and stirs in the aluminum alloy melt at a constant speed, N2 and Cl2 mixing gas and a refining agent are introduced simultaneously, and meanwhile, floating slag on the surface of the aluminum alloy melt isremoved; after the aluminum alloy melt is smelt for 15-20 min, the melt is heated to 720-740 DEG C, and N2 and Ar mixing gas is introduced into the melt for exhausting; and after air exhausting is finished, slagging-off is conducted once again, after standing still is conducted for a period of time, filtering is conducted, and particulate impurities are removed. According to the purifying method of the aluminum alloy melt, a motor is used for driving rotation, big bubbles entering the melt are broken up into fine bubbles, and the refining effect is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a method for purifying an aluminum alloy melt. Background technique [0002] Aluminum and its alloys have a series of excellent properties. In the application of metal materials, aluminum is second only to steel. At present, the world's aluminum consumption (primary aluminum and secondary aluminum) has exceeded 36 million tons, while the consumption of aluminum has reached more than 26 million tons, which is used for transportation (including railway vehicles, automobiles, motorcycles, bicycles, etc.) , motorboats, speedboats, etc.) account for more than 36% of the aluminum, the aluminum used in the construction industry accounts for about 21%, and the aluminum used in the packaging industry accounts for about 20%. With the continuous development of science and technology, especially the high-tech field, the quality requirements for aluminum and its alloy produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/10C22B9/05C22B9/02
CPCC22B21/064C22B21/066Y02P10/20
Inventor 梁春才梁健梁祥友
Owner 广西平果铝合金精密铸件有限公司
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