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Foamed ceramic aluminum melt filter tube, manufacturing method and filtering device

A foam ceramic filter and filter device technology, which is applied in ceramic products, separation methods, filter separation, etc., can solve the problems of reduced filtration efficiency, impossibility of too large filter area of ​​plate filter, insufficient flow rate, etc.

Active Publication Date: 2010-12-29
HUNAN HUAKE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the volume of the filter box, the filter area of ​​the plate filter cannot be too large, resulting in a rapid decrease in filtration efficiency during use. After a single filter plate is used once, part of the pores are blocked by inclusions, resulting in insufficient flow. It cannot be used continuously or repeatedly for a long time, so the filtration cost is high

Method used

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  • Foamed ceramic aluminum melt filter tube, manufacturing method and filtering device
  • Foamed ceramic aluminum melt filter tube, manufacturing method and filtering device
  • Foamed ceramic aluminum melt filter tube, manufacturing method and filtering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The length of the foam ceramic filter tube is 500mm, the outer diameter is 120mm, and the inner diameter is 60mm. 40ppi - Integrated filter with 7 filter tubes. Before filtering the aluminum melt, put the filter tube into the filter box as required. Heat the filter box first. For the filter box containing 7 filter tubes, it is generally preheated for 6-10 hours. For optimum filtration and subsequent performance, the preheating temperature should be a maximum of 800°C. When filtering, the average flow rate of the aluminum melt should be controlled to be about 50 tons / hour for the filter box of 7 40ppi pipes. A filter box containing seven 40ppi porous ceramic filter tubes can pass about 700-1000 tons of aluminum melt. According to statistics, the following table (1) can get the filtering effect of the filter box of 7 40ppi filter tubes.

[0023] Table I

[0024] Impurity particle size - micron

Embodiment 2

[0026] The length of the foam ceramic filter tube is 500mm, the outer diameter is 120mm, and the inner diameter is 60mm. 60ppi - Integrated filter with 7 filter tubes. According to embodiment 1, filter box is heated, and the maximum immersion temperature that makes preheating is 800 ℃. The filter box with 7 60ppi tubes should control the average flow rate of aluminum melt to about 40 tons / hour. According to statistics, a filter box containing 7 60ppi filter tubes can pass through about 600-800 tons of aluminum solution. According to the statistics, the filtering effect of the filter box of 7 60ppi filter tubes can be found in the following table (2).

[0027] Table II

[0028] Impurity particle size - micron

Embodiment 3

[0030] The length of the foam ceramic filter tube is 500mm, the outer diameter is 120mm, and the inner diameter is 60mm. 60ppi - Integrated filter with 14 filter tubes. According to embodiment 1, filter box is heated, and the maximum immersion temperature that makes preheating is 800 ℃. The filter box with 14 60ppi tubes should control the average flow rate of aluminum melt to about 80 tons / hour. According to statistics, a filter box containing 14 60ppi filter tubes can pass through about 1200-1600 tons of aluminum solution. According to statistics, the following table (3) can find out the filter effect of the filter box of 14 60ppi filter tubes.

[0031] Table three

[0032] Impurity particle size - micron

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Abstract

The invention relates to a foamed ceramic aluminum melt filter tube, a manufacturing method and a filtering device. The filter tube is prepared from the following raw materials in part by weight: 30 to 40 parts of aluminum dihydrogen phosphate, 1 to 2 parts of fumed silica, 2 to 3 parts of kaolin clay, 1 to 2 parts of aerogel, 60 to 62 parts of alpha alumina, 1 to 2 parts of anti-foaming agent, and 0.5 to 1 part of dispersant. The filter tube consists of a filter and a filter box which are integrated by a foamed ceramic tube, has the combined advantages of high efficiency of aluminum melt filtration by a plate-like foamed ceramic filter and large-area and high-precision filtration of a tube-like porous ceramic filter in a small box, and replaces the plate-like ceramic filters and the porous ceramic filter tubes in the conventional process boxes. When aluminum melt is passed through filter box provided with an integrated foamed ceramic filter tube, because the foamed ceramic filter tube has the characteristics of high open ratio, small filtration resistance, small static difference, high surface energy, strong impurity adsorption, low cost and the like, the aluminum molten liquid can be filtered in large area and high efficiency in the small filter box.

Description

technical field [0001] The invention relates to a filter device for metal smelting, in particular to a foam ceramic aluminum melt filter tube, a manufacturing method and a filter device. Background technique [0002] Most of the inclusions in the aluminum solution are formed during the smelting and pouring process, and a small part comes directly from the charge. These impurities can be divided into two categories according to their size: one is large inclusions distributed unevenly in the macrostructure; the other is fine diffuse inclusions. At present, ceramic foam filter plates are widely used to remove impurities in aluminum melts. It has high porosity, high filtration efficiency, high strength, excellent resistance to aluminum water erosion and good thermal performance; the filtration effect is related to the size of the pores, and stability can be obtained by carefully controlling the size of the pores on the filter plate (ppi). Excellent filtration effect; and the f...

Claims

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Application Information

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IPC IPC(8): B01D29/33B01D39/20C04B35/10C04B38/06C22B9/02
CPCY02P10/20
Inventor 陈建春黄克明吴荣庭陈勇刚
Owner HUNAN HUAKE MACHINERY
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