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: 2011-05-25
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 like this, method step is: Prefabricate a special-type cast iron sprue composed of a sprue and 4 outlet channels perpendicular to the sprue, and brush the zinc oxide-water glass coating inside the sprue. 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 from the inside to the outside in the order of coarse porosity to fine porosity 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 with a hole size and thickness of 10ppi-20mm and 40ppi-20mm respectively; the fourth layer is ceramic granular Filter, the average size of ceramic particles is Φ2mm and the thickness is 30mm; The high temperature resistant ceramic sprue is fastened in the centrifugal device, and the axis of the sprue coincides wi...

Embodiment 2

[0018] The present invention is realized like this, method step is: Prefabricate a special-type cast iron runner composed of a sprue and an annular outlet channel coaxial with the sprue, and brush the zinc oxide-water glass coating inside the runner. There are 3 layers of cylindrical porous ceramic filters built in the annular runner. The first layer is a columnar ceramic cylinder with a diameter of Φ8mm and a column spacing of 7mm; the second and third layers are foam ceramic cylinders, and the hole size is the same as The thicknesses are 10ppi-20mm and 20ppi-20mm respectively. The fourth layer is a granular ceramic filter with an average diameter of ceramic particles of 2mm. When the high temperature resistant metal runner is placed in the centrifugal device, the axis of the sprue coincides with the rotation axis of the centrifugal device; Preheat the sprue to 1000°C before pouring; Start the centrifugal device, the rotating speed of the centrifugal device is in the ra...

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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 multiple filtering media in a centrifugal force field of an aluminum alloy melt. Background technique [0002] After more than 50 years of development, China's aluminum profile industry has become a major producer of aluminum profiles in the world. The number of enterprises, production capacity and output all rank first in the world. In the production process of aluminum alloy profiles, aluminum alloy purification is one of the important process links to ensure the quality of profiles. In the production of existing aluminum alloy profiles, large-scale filter boxes are used for aluminum alloy purification, and large-size foam ceramic filter plates, flux, and gas injection devices are placed in the box to realize the combination of flux refining, bubble adsorption and foam ceramic filtration. purify. Although the purification effect is good, it is expensive a...

Claims

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Application Information

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Patent Type & Authority Applications(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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