Fe-Al-series metal film and preparation method thereof

A metal membrane, fe-al technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of large filtration resistance, expand the application range of metal porous membranes, and low flux, and achieve low filtration resistance, Improve the effect of membrane material performance defects and high filtration accuracy

Pending Publication Date: 2020-06-09
AT&M ENVIRONMENTAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Solve the defects of large filtration resistance and low flux of existing traditional metal filter elements in low-pressure working environment by studying the development process of metal film
[0008] 2. Give full play to the advantages of high temperature resistance and corrosion resistance of Fe-Al intermetallic compounds, solve the problems existing in the existing Fe-Al metal porous membranes, and expand the scope of application of metal porous membranes in industrial filtration

Method used

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  • Fe-Al-series metal film and preparation method thereof
  • Fe-Al-series metal film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] 1. Slurry preparation: Mix -500 mesh FeAl powder with a water-based solvent added with organic additives at a ratio of 1:2.5 for more than 1 hour, perform defoaming treatment for later use, and select organic additives such as methyl cellulose, vinyl alcohol, and acrylic acid. One or more of triol, polyethylene glycol and dibutyl phthalate.

[0047] 2. Wire mesh rolling: Roll the 316L stainless steel wire mesh with a cut size of 320*630mm to a thickness of 0.1-0.2mm, and keep the flatness below 0.05mm.

[0048] 3. Tape casting: adjust the distance between the cutting tools of the casting machine, the front knife is 0.5-0.7mm, the back knife is 0.4-0.6mm, the casting speed is 0.01-0.2mm / s, and the preheating temperature is set to 45-55°C in zone 1, 2 , 3 zone temperature 50-60 ℃. Put the screen under the cutter and fix it on the casting substrate, add the slurry and cast to form a screen membrane, clean the remaining powder on the membrane after drying, check whether th...

example 2

[0051] 1. Slurry preparation: -500 mesh Fe 3 Al powder and water-based solvent added with organic additives were mixed at a ratio of 1:3 for more than 1 hour, and then used after defoaming treatment. The organic additives were methyl cellulose, vinyl alcohol, glycerol, polyethylene glycol and phthalate. One or more of dibutyl formate.

[0052] 2. Wire mesh rolling: Roll the 310S stainless steel wire mesh with a cut size of 500*800mm to a thickness of 0.1-0.2mm, and keep the flatness below 0.05mm.

[0053] 3. Tape casting: adjust the distance between the cutting tools of the casting machine, the front knife is 0.5-0.7mm, the back knife is 0.4-0.6mm, the casting speed is 0.01-0.2mm / s, and the preheating temperature is set to 45-55°C in zone 1, 2 , 3 zone temperature 50-60 ℃. Put the screen under the cutter and fix it on the casting substrate, add the slurry and cast to form a screen membrane, clean the remaining powder on the membrane after drying, check whether there are leak...

example 3

[0056] 1. Slurry preparation: Mix -500 mesh FeCrAl powder with water-based solvent with organic additives at a ratio of 1:3.3 for more than 1 hour, perform defoaming treatment for later use, and select organic additives such as methyl cellulose, vinyl alcohol, and glycerin One or more of alcohol, polyethylene glycol and dibutyl phthalate.

[0057] 2. Wire mesh rolling: Roll the cut FeCrAl wire mesh with a size of 550*1050mm to a thickness of 0.2-0.3mm, and keep the flatness below 0.05mm.

[0058] 3. Tape casting: adjust the distance between the cutting tools of the casting machine, the front knife is 0.4-0.6mm, the rear knife is 0.5-0.7mm, the casting speed is 0.01-0.2mm / s, the preheating temperature is set to 45-55℃ in zone 1, 2 , 3 zone temperature 50-60 ℃. Put the screen under the cutter and fix it on the casting substrate, add the slurry and cast to form a screen membrane, clean the remaining powder on the membrane after drying, check whether there are leaks or cracks, an...

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Abstract

The invention discloses a Fe-Al-series metal film and a preparation method thereof, belonging to the related technical field of gas-solid separation under high-temperature and low-pressure working conditions. The invention mainly aims to overcome the defect that a traditional metal filter element is large in filtering resistance, low in flux and the like in a low-pressure working environment in the prior art. The preparation method comprises the steps: subjecting Fe-Al-series metal powder and a water-based solvent added with an organic additive to stirring and defoaming to obtain tape castingslurry; carrying out tape casting on a metal base layer with a desired thickness by using a tape casting machine to obtain a uniform film layer, and drying the uniform film layer to obtain a film blank; and subjecting the dried film blank to degreasing, sintering and alloy phase ordering treatment in a sintering furnace to prepare the Fe-Al-series metal film, wherein the degreasing treatment refers to treatment for removing the organic additive. Therefore, the Fe-Al-series metal film prepared by the method has high flux and can be applied under the working conditions of high operation temperature, low working pressure and low outlet solid content.

Description

technical field [0001] The invention relates to the technical field related to gas-solid separation under high temperature and low pressure conditions, especially to the technical field of performance optimization of iron-aluminum (hereinafter referred to as Fe-Al) metal film and its green preparation method. Background technique [0002] Boiler exhaust gas is a kind of exhaust gas containing soot, SO 2 , NO x Unreasonable control and substandard emissions will seriously pollute the atmosphere, reduce air quality, and have adverse effects on the ecological environment and even the future development of mankind. At present, the amount of boiler tail gas emitted by industrial boilers in my country can reach 6-8Mt per year, accounting for a large proportion of the total smoke and dust emissions in the country. Therefore, strengthening the control of boiler tail gas emissions and effectively reducing the content of solid particles in the tail gas is crucial to improving air qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D46/54
CPCB01D71/022B01D67/0039B01D46/543B01D67/0046B01D69/108B01D67/00411B01D71/0223B01D67/0086B01D69/12B01D67/0083
Inventor 顾虎杨军军王凡刘冠颖张玉杨烜王琨林士玉
Owner AT&M ENVIRONMENTAL ENG TECH CO LTD
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