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Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field

A technology of aluminum alloy melt and centrifugal force field, applied in the field of filtration, can solve the problems of high cost and high consumption, and achieve the effect of convenient operation and simple method

Inactive Publication Date: 2013-01-16
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the purification effect is good, it is expensive and expensive

Method used

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  • Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field
  • Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field
  • Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field

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Embodiment 1

[0016] The present invention is realized in this way, and the method steps are: Prefabricated a special cast iron runner with a sprue and 4 outlet channels perpendicular to the sprue, and the sprue is brushed with zinc oxide-water glass coating. The axes of the 4 outlet channels are on a horizontal plane and form an angle of 90°; 4 pieces of porous ceramic filters are placed in each runner outlet channel, and the ceramic filters are stacked in the order of coarse porosity to fine porosity from the inside to the outside In the outlet channel, the innermost layer is a ceramic orifice plate with a hole size of Φ10mm, the second and third layers are foam ceramic filters, the hole size and thickness are 10ppi-20mm, 40ppi-20mm, and the fourth layer is ceramic granular Filter disc, the average size of ceramic particles is Φ2mm and the thickness is 30mm; The high-temperature-resistant ceramic runner is placed tightly in the centrifugal device, and its sprue axis coincides with the rot...

Embodiment 2

[0018] The present invention is realized in this way, and the method steps are: Prefabricated a special cast iron runner composed of a sprue and an annular outlet channel coaxial with the sprue, and the sprue is brushed with zinc oxide-water glass coating. The ring runner is built with 3 layers of cylindrical porous ceramic filters. The first layer is a columnar ceramic cylinder, the diameter of the ceramic cylinder is Φ8mm, and the column spacing is 7mm; the second and third layers are foam ceramic cylinders with the same hole size The thickness is 10ppi-20mm, 20ppi-20mm, the fourth layer is a granular ceramic filter, the average diameter of ceramic particles is 2mm. When the high temperature resistant metal runner is placed in the centrifugal device, its sprue axis coincides with the rotation axis of the centrifugal device; Preheat the runner to 1000℃ before pouring; Start the centrifugal device, the rotation speed of the centrifugal device is in the range of 500r / min, and ...

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Abstract

The invention discloses a method for composite-filtering foamed ceramics in aluminum-alloy centrifuge field, which comprises the following steps: (1) prefabricating a high-temperature resistance metal sprue, which is made of special-shaped cast iron or steel with a sprue and an export channel vertical to the sprue combined, applying zinc oxide - a water-glass coating or a lining refractory free of aluminium to the inside of the sprue, and placing a plurality of high-temperature resistance ceramic filters in the export channel of the sprue, wherein the ceramic filters are stacked within the export channel and arranged inside-out in an order from big pore to small pore, and the total thickness of the filters is 20-300 mm; (2) fastening the high-temperature resistance metal sprue in a centrifugal device, wherein the sprue axis coincides with a spin axis of the centrifugal device; (3) preheating the sprue and the foamed ceramics to 400 DEG C before pouring; and (4) starting the centrifugal device to rotate the sprue, with the rotary speed of the centrifugal device in a range of 10-3000 r / min, and then pouring the aluminum melt to enable the aluminum-alloy melt to pass through the ceramic filters under the centrifugal force. The method provided by the invention has the advantages that the method is easy to operate, and the clearance rate of oxides of more than 1 mu m can reach over90% after the aluminum alloy is purified.

Description

Technical field [0001] The invention relates to a filtering method, in particular to a composite filtering method of aluminum alloy melt centrifugal force field with multiple filter media. Background technique [0002] After more than 50 years of development, China's aluminum profile industry has become the world's largest aluminum profile producer. The number of enterprises, production capacity, and output rank first in the world. In the production process of aluminum alloy profiles, aluminum alloy purification is one of the important processes to ensure the quality of the profiles. In the production of existing aluminum alloy profiles, large-scale filter boxes are used for aluminum alloy purification. Large-size ceramic foam filter plates, flux, and gas injection devices are placed in the box to achieve a combination of flux refining, bubble adsorption and foam ceramic filtration. Purify. Although the purification effect is good, it is expensive and costly. Summary of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/08C22B9/02B01D35/02
CPCY02P10/20
Inventor 王薇薇戴斌煜商景利
Owner NANCHANG HANGKONG UNIVERSITY
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