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Molten aluminum online vacuum degassing device and method

A technology of vacuum degassing device and molten aluminum, applied in the field of material metallurgy, can solve problems such as unstable degassing effect, and achieve the effects of stable degassing process and high degassing efficiency

Pending Publication Date: 2021-06-11
百色百矿集团产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to solve the problems of "unstable degassing effect" and "injecting toxic chlorine gas when producing high-end aluminum alloy" existing in the existing aluminum liquid degassing technology, and provide a stable and efficient aluminum liquid online vacuum Degassing device and method, the purpose of which is to reduce the hydrogen content in molten aluminum before casting, thereby improving the internal structure quality of aluminum alloy ingots

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  • Molten aluminum online vacuum degassing device and method
  • Molten aluminum online vacuum degassing device and method
  • Molten aluminum online vacuum degassing device and method

Examples

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a device for online vacuum degassing of molten aluminum includes a vacuum furnace 1, a double-chamber tank 2 and a vacuum pump 5; the bottom of the vacuum furnace 1 is provided with two depressions 13; the two depressions 13 are respectively connected to the flow of aluminum liquid 21 The riser 14 of the vacuum furnace 1 and the molten aluminum 21 flow out of the downcomer 15 of the vacuum furnace 1; the two recesses 13 are provided with ventilating bricks 16 along the circumference of the riser 14 and the downcomer 15, so that The air-permeable brick 16 is used to provide inert gas; the two sides of the double-chamber tank 2 are respectively provided with the inlet 22 of the aluminum liquid flow tank and the outlet 23 of the aluminum liquid flow tank; The chamber tank 2 is divided into a liquid inlet tank and a liquid outlet tank; the liquid level of the aluminum liquid 21 on the side of the riser 14 in the double chamber tank 2 is higher tha...

Embodiment 2

[0038] Adopt the device of the aluminum liquid online vacuum degassing of embodiment 1 to carry out degassing, degassing method comprises the following steps:

[0039] S1: Inject aluminum liquid 21 from the entrance 22 of the aluminum liquid flow tank into the double-chamber tank 2, lower the vacuum furnace 1, so that the riser 14 and downcomer 15 of the vacuum furnace 1 are respectively immersed in the aluminum liquid 21 of the double-chamber tank 2 , turn on the vacuum pump 5 to vacuumize, so that the air pressure in the vacuum furnace 1 is lower than the external pressure of the vacuum furnace 1, and the aluminum liquid 21 enters the vacuum furnace 1 under the effect of the air pressure difference between the inside and outside of the vacuum furnace 1 to start degassing;

[0040] S2: During the degassing process of the aluminum liquid 21, a small amount of inert gas is sprayed through the breathable brick 16, and the gas sprayed to the breathable brick 16 surrounding the ris...

Embodiment 3

[0042] Adopt the device of the aluminum liquid online vacuum degassing of embodiment 1 to carry out degassing, degassing method comprises the following steps:

[0043] S1: Inject aluminum liquid 21 from the entrance 22 of the aluminum liquid flow tank into the double-chamber tank 2, lower the vacuum furnace 1, so that the riser 14 and downcomer 15 of the vacuum furnace 1 are respectively immersed in the aluminum liquid 21 of the double-chamber tank 2 , turn on the vacuum pump 5 to vacuumize, so that the air pressure in the vacuum furnace 1 is lower than the external pressure of the vacuum furnace 1, and the aluminum liquid 21 enters the vacuum furnace 1 under the effect of the air pressure difference between the inside and outside of the vacuum furnace 1 to start degassing;

[0044] S2: During the degassing process of the aluminum liquid 21, a small amount of inert gas is sprayed through the breathable brick 16, and the gas sprayed to the breathable brick 16 surrounding the ris...

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Abstract

The invention discloses a molten aluminum online vacuum degassing device and method. The device comprises a vacuum furnace, a double-chamber tank and a vacuum pump, wherein two concave parts are arranged at the bottom of the vacuum furnace and are connected with a liquid rising pipe and a liquid falling pipe correspondingly, the two concave parts are provided with air bricks along the peripheral sides of the liquid rising pipe and the liquid falling pipe, a molten aluminum flow tank inlet and a molten aluminum flow tank outlet are formed in two sides of the double-chamber tank correspondingly, a partition plate is arranged in the middle of the double-chamber tank and divides the double-chamber tank into a liquid inlet tank and a liquid outlet tank, a liquid level of molten aluminum at the side of the liquid rising pipe in the double-chamber tank is higher than a liquid level at the side of the liquid falling pipe, the vacuum furnace is erected on the double-chamber tank and can move in a vertical direction, the liquid rising pipe and the liquid falling pipe extend into the liquid inlet tank and the liquid outlet tank respectively, and the vacuum pump is arranged on the top of the vacuum furnace. According to the device, the vacuum furnace and the double-chamber tank are separately arranged, a depth of a molten aluminum melting pool in a vacuum chamber is adjusted by adjusting a relative height and a vacuum degree of the vacuum furnace, the molten aluminum flow is controlled by blowing inert gas to the air bricks, and degassing stability and efficiency are high.

Description

technical field [0001] The invention relates to the technical field of material metallurgy, in particular to a device and method for online vacuum degassing of molten aluminum. Background technique [0002] The gas element in molten aluminum is mainly hydrogen, and its content is generally greater than 0.35ml / 100g. It precipitates and forms bubbles during the solidification process of molten aluminum. Once captured by the solidification front, pinholes, pores, looseness, etc. will be formed in the ingot. Defects, resulting in ingot scrapping or subsequent processing defects. According to reports, casting waste products directly or indirectly caused by excessive hydrogen concentration in liquid aluminum account for more than 40% of the total waste products. As the application range of aluminum alloy products becomes wider and wider, the requirements for the compactness of the internal structure of aluminum alloy ingots are also higher and higher. Reducing the hydrogen conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/04C22B9/05
CPCC22B9/04C22B9/05C22B21/064C22B21/068
Inventor 秦颐鸣赵茂密冯恩浪苏积波张钢薛闯
Owner 百色百矿集团产业技术研究院有限公司
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