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Iron-chromium-aluminum-based porous metal material and preparation method thereof

A technology of iron-chromium-aluminum and porous metal, which is applied in the field of porous metal filter elements and its preparation, can solve the problems of short service life, complex process, high raw material cost, etc., and achieve the effect of long service life and improved heat transfer performance

Inactive Publication Date: 2015-05-20
北京绿洁美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can prepare iron-chromium-aluminum porous metal materials, there are problems such as complicated process and high raw material cost; Affect the service life of such materials in high temperature environment
[0005] Aiming at the problems of small filter area, short service life, and difficulty in recyclable use of existing filter elements used in high-temperature environments, the inventors have repeatedly studied and invented a porous metal filter element used in high-temperature environments and its preparation method

Method used

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  • Iron-chromium-aluminum-based porous metal material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepared iron-chromium-aluminum-based porous metal material components, by mass percentage:

[0037] Aluminum 3, chromium 18, silicon carbide 3, lanthanum cerium mixed rare earth 0.03, and the balance is iron.

[0038] Its preparation method comprises the following steps:

[0039] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0040] According to the mass ratio of silicon carbide 3 and rare earth 0.03 in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide after 5 times amplification in the same proportion is 15, and the mass ratio of rare earth is 0.15. 15 kg of powder, 0.15 kg of rare earth, mixed with 15.15 kg of iron powder to obtain a mixed powder, the mixed powder is vacuum ball milled and mixed evenly, pressed into shape, vacuum sintered at 1200-1300 ° C for 2 hours, and cooled with the furnace to obtain rare earth-containing iron- SiC sintered block;

[0041] The second step: pr...

Embodiment 2

[0050] Prepared iron-chromium-aluminum-based porous metal material components, by mass percentage:

[0051] Aluminum 5, chromium 20, silicon carbide 6, rare earth yttrium 0.25, and the balance is iron.

[0052] Its preparation method comprises the following steps:

[0053] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0054] According to the mass ratio of silicon carbide 6 and rare earth 0.25 in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide magnified by 4 times in the same proportion is 24, and the mass ratio of rare earth is 1. Weigh silicon carbide 24 kg of powder, 1 kg of rare earth, and 50 kg of iron powder are mixed to obtain a mixed powder. After the mixed powder is vacuum ball milled and mixed evenly, it is pressed and molded. Silicon sintered block;

[0055] The second step: preparation of iron-chromium-aluminum alloy ingot containing silicon carbide and rare earth

[0056] Ac...

Embodiment 3

[0064] Prepared iron-chromium-aluminum-based porous metal material components, by mass percentage:

[0065] Aluminum 6, chromium 25, silicon carbide 10, rare earth yttrium 0.5, and the balance is iron.

[0066] Its preparation method comprises the following steps:

[0067] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0068] According to the mass ratio of silicon carbide 10 and rare earth 0.5 in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide after 2 times amplification in the same proportion is 20, and the mass ratio of rare earth is 1. Weigh silicon carbide respectively 20 kg of powder, 1 kg of rare earth, and 21 kg of iron powder are mixed to obtain a mixed powder. After the mixed powder is vacuum ball milled and mixed evenly, it is pressed and molded. Silicon sintered block;

[0069] The second step: preparation of iron-chromium-aluminum alloy ingot containing silicon carbide and rar...

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Abstract

The invention relates to an iron-chromium-aluminum-based porous metal material and a preparation method thereof. The material comprises through-holes having a pore size of 500nm-40um. The iron-chromium-aluminum-based porous metal material is prepared from the following raw materials: aluminum powder, chromium powder, iron powder, silicon carbide and rare earths. The preparation method of the iron-chromium-aluminum-based porous metal material comprises the following steps: firstly, carrying out vacuum sintering silicon carbide powder, rare earth and iron powder to obtain iron-silicon carbide sintering blocks containing rare earth, smelting the iron-silicon carbide sintering blocks, aluminum ingots, chromium powder and balance iron powder together under the protection of argon to obtain iron-chromium-aluminum-based alloy ingots, crushing the alloy ingots, carrying out vacuum ball milling to obtain alloy powder and finally uniformly mixing alloy powder, a pore-forming agent and a binder, carrying out compression molding and sintering to obtain the iron-chromium-aluminum-based porous metal material. The material has the advantages of long service life at high temperature and the like and furthermore, the large-scale industrialization can be achieved by the preparation method.

Description

technical field [0001] The invention relates to a porous metal filter element capable of filtering high-temperature dusty flue gas or high-temperature particle-containing fluid and having excellent high-temperature strength and a preparation method thereof, belonging to the technical field of porous metal material preparation. Background technique [0002] Traditional flue gas treatment methods including cyclone dust collection, electric dust collection, bag dust collection and wet room temperature purification are difficult to directly filter high-temperature flue gas; in order to solve the problems in existing high-temperature dust collection, patent CN101934177B proposes The use of granular beds for the purification of high-temperature flue gas, but this patented technology is still difficult to capture the fine particle dust in the flue gas and other defects; porous ceramics can realize the direct purification of high-temperature flue gas, but its poor thermal shock resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C33/02
Inventor 张志敏周向阳周向清
Owner 北京绿洁美科技有限公司
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