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Swiveling jetting device for removing hydrogen from aluminum melt

A technology of rotary injection and aluminum melt, applied in the field of rotary injection device, can solve the problems of inability to obtain bubbles, insufficient ability of three bosses to crush bubbles, limited stirring ability, etc., to reduce hydrogen absorption and improve hydrogen removal. Efficient and efficient crushing effect

Active Publication Date: 2011-01-12
JIANGSU HONGDE SPECIAL PARTS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned currently commonly used rotary blowing device are: on the one hand, the crushing ability of the three bosses to the bubbles is insufficient, and very fine bubbles cannot be obtained; on the other hand, the stirring ability of the three bosses is limited, and it cannot be used The aluminum melt at the bottom produces a lot of turbulence; even if the rotation speed of the nozzle is increased, the turbulence of the bottom aluminum melt can be increased, but at the same time it drives the rotation of the surface aluminum melt, forming a large vortex, resulting in aluminum melt inhale

Method used

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  • Swiveling jetting device for removing hydrogen from aluminum melt
  • Swiveling jetting device for removing hydrogen from aluminum melt
  • Swiveling jetting device for removing hydrogen from aluminum melt

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A rotary blowing device for dehydrogenation of aluminum melt, comprising a gas pipe 1 and a gas nozzle 2, the gas nozzle 2 is threadedly connected to the lower end of the gas pipe 1, and the center of the gas nozzle 2 is provided with an air hole 3 communicating with the gas pipe 1 , the diameter of the gas hole 3 is 5-8mm; 6-10 side teeth 4 are evenly distributed on the circumference of the gas nozzle 2, and each side tooth 4 and the body of the gas nozzle 2 between the adjacent two side teeth 4 form a radial concave Groove 5, the width of the groove 5 is 3-5mm, the gas in the air duct 1 diffuses around after passing through the air hole 3, is broken by the groove 5, and then moves along the groove 5.

[0032] Rotate and blow inert gas under the nozzle of the present invention, the gas reaches the gas nozzle 2 through the air guide pipe 1, diffuses to the surrounding after passing through the air hole 3, and as the linear velocity increases, the bubbles are first broken...

Embodiment 2

[0034] Use the existing common rotary blowing device and the rotary blowing device of the present invention to carry out dehydrogenation of the aluminum melt under the same ventilation flow rate, the rotary blowing time is equal, and take the aluminum melt at four times after the blowing is completed. The body casting test bar was tested, and the mechanical properties of the products were compared as shown in the following table:

[0035] Table 1: Hydrogen removal by blowing with existing common rotary nozzles:

[0036]

[0037] Table two: Utilize the rotary injection device of the present invention to carry out injection dehydrogenation:

[0038]

[0039] It can be seen from Table 1 and Table 2 that the aluminum melt casting test rod obtained after the rotary blowing device of the present invention is blown and dehydrogenated is obviously better than the existing common rotary spraying in terms of tensile strength and elongation after fracture. The aluminum melt obtain...

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Abstract

The invention relates to a swiveling jetting device for removing hydrogen from aluminum melt, which comprises a gas-guide pipe and a gas tip, wherein, the gas tip is positioned at the lower end of thegas-guide pipe, the circle centre of the gas tip is provided with a gas hole communicated with the gas-guide pipe, and the diameter of the gas hole is 5-8mm; the circumference of the gas tip is evenly distributed with 6-10 side teeth, radial grooves are formed on each side tooth and a gas tip body arranged between the two adjacent side teeth, and the width of each groove is 3-5mm; the gas in thegas-guide pipe spreads all around after passing through the gas hole, shattered by the grooves and then moves outwards along the grooves. The swiveling jetting device has simple and reasonable structure, can efficiently crash, cut and thin gas bubble to ensure the gas bubble to be evenly distributed in the aluminum melt, and effectively avoids violent rolling generated on the surface of the aluminum melt in the process of hydrogen removal by swiveling jetting, thus remarkably improving the efficiency of hydrogen removal.

Description

1. Technical field [0001] The invention belongs to the field of purification treatment of aluminum melts, and in particular relates to a rotary blowing device for dehydrogenation of aluminum melts. 2. Background technology [0002] Aluminum alloy castings used for high-voltage power transmission and distribution and medical equipment should withstand high internal pressure. In addition to strict control of chemical composition, physical properties, mechanical properties and dimensional accuracy, surface and internal quality defects are not allowed. Such as shrinkage cavity, stomata, porosity and so on. The quality of aluminum alloy castings directly depends on the quality of the melt. Therefore, the purification of aluminum alloy melt is very important. Hydrogen is the only gas that can be dissolved in a large amount in the aluminum melt. In the aluminum melt, hydrogen accounts for more than 80%. This view has been obtained by the spectral analysis data of the extracted ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B21/06C22B9/05
Inventor 杨金德郁晓兵潘冶徐亮
Owner JIANGSU HONGDE SPECIAL PARTS CO LTD
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