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Preparation method of powder net composite porous metal film

A technology of porous metal and thin film, which is applied in the field of preparation of powder mesh composite porous metal thin film, which can solve the problems of easy corrosion and temperature difference, and achieve the effects of low production cost, low defect rate and high filtration accuracy

Pending Publication Date: 2021-07-30
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of powder mesh composite porous metal film, which solves the problems of temperature difference and easy corrosion of existing organic film dust removal filter bags

Method used

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  • Preparation method of powder net composite porous metal film
  • Preparation method of powder net composite porous metal film
  • Preparation method of powder net composite porous metal film

Examples

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preparation example Construction

[0031] The invention provides a preparation method of a powder mesh composite porous metal film, such as figure 1 As shown, add plasticizer, thickener, organic solution or deionized water, add metal powder, stir and disperse, and finally prepare a high-viscosity slurry system. Pour the prepared high-viscosity slurry system into the extruder 1 with a slit-shaped die installed on the machine head, extrude the film from the machine head and transfer it to the two-roll rolling machine 3 through the conveyor belt 2, and pass the composite film on both sides, and the two A sheet of metal film green body is combined with a single-layer wire mesh 4, and the film green body and the wire mesh are combined by composite rolling to form an integrated symmetrical film structure, that is, a powder mesh composite porous metal film green body 5, which is then degreased and sintered. A powder mesh composite porous metal film with uniform pore size and controllable thickness was prepared. Speci...

Embodiment 1

[0039] 1. Prepare PVB ethanol solution at a mass ratio of 1:15. After aging for 24 hours, stir and mix glycerol and PVB ethanol solution at a mass ratio of 1:20 to obtain a mixed liquid.

[0040] 2. The Fe with an average particle size of 15 μm 3 Mix the Al alloy powder and the mixed liquid at a mass ratio of 5:1, slowly add the metal powder, and stir to obtain a viscous slurry system;

[0041] 3. Pour the viscous slurry system into two extruders, and extrude the film body from the slit-shaped die mouth with a size of 300mm×200μm under the push of the screw, and slowly transfer the conveyor belt to the two-roll rolling machine; from the middle top Place a 350mm wide 60-mesh FeCrAl single-layer wire mesh, compound the film body on both sides under the action of a rolling force of 30T, and precisely match the rolling speed with the conveyor belt, and prepare the powder mesh composite porous metal film body;

[0042]4. Cut the powder mesh composite porous metal film body into a ...

Embodiment 2

[0046] 1. Prepare PVB isopropanol solution at a mass ratio of 1:20. After aging for 24 hours, stir and mix glycerol and PVB isopropanol solution at a mass ratio of 1:15 to obtain a mixed liquid.

[0047] 2. Mix 316L stainless steel powder with an average particle size of 20 μm and the mixed liquid at a mass ratio of 6:1, slowly add the metal powder, and stir to obtain a viscous slurry system;

[0048] 3. Pour the viscous slurry system into two extruders, and extrude the film body from the slit-shaped die mouth with a size of 800mm×500μm under the push of the screw, and slowly transfer the conveyor belt to the two-roll rolling machine; from the middle top Place a 900mm wide 40-mesh 316L stainless steel single-layer wire mesh, compound the film body on both sides under the action of a rolling force of 100T, and precisely match the rolling speed and the conveyor belt to prepare a powder-mesh composite porous metal film body;

[0049] 4. Cut the powder mesh composite porous metal ...

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Abstract

The invention discloses a preparation method of a powder net composite porous metal film, which comprises the steps of 1, uniformly mixing metal powder with a plasticizer, a thickening agent and an organic solvent or deionized water according to a certain proportion to prepare high-viscosity slurry; 2, extruding the high-viscosity slurry into a strip-shaped film blank through a slit-type die opening by using an extruding machine, conveying the strip-shaped film blank to two rolling mills through a conveying belt, and rolling the strip-shaped film blank into a strip-shaped powder net composite porous metal film blank through composite film blanks on the two sides and a composite single-layer metal wire net in the middle; and 3, laying an isolating layer on the strip-shaped powder net composite porous metal film blank through aluminum oxide powder, conducting degreasing and sintering in a hydrogen sintering furnace, and then obtaining the powder net composite porous metal film. The preparation process is simple, the cost is low, the efficiency is high, and the prepared powder net composite porous metal film is uniform in pore size distribution, small in maximum pore size, high in permeability coefficient and capable of being widely applied to the fields of flue gas dust removal, water purification and the like.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a preparation method of a powder mesh composite porous metal film. Background technique [0002] Bag-type flue gas dust removal filters, especially high temperature resistant and corrosion resistant dust removal filter bags, have been widely used in the field of environmental protection, thermal power plants, cement plants, metallurgical plants and other fields. The current main materials of dust filter bags are glass fiber, polytetrafluoroethylene and polyphenylene sulfide (PPS). The maximum service temperature is only 200°C, which cannot be used in higher temperature and corrosive environments. Metal materials, especially nickel-based superalloys, Fe-Al intermetallic compounds, iron-based superalloys and other materials have high temperature resistance and corrosion resistance, but the forming method of porous metal powder is generally unable to prepare ult...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D46/54C02F1/44
CPCB01D71/022B01D69/02B01D67/0039B01D67/0041B01D46/0001B01D46/543C02F1/44
Inventor 王耀辉曹卜元成凯
Owner WESTERN BAODE TECH CO LTD
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