Method for producing compound filter of multi-layer metal meshes and metal powder

A metal powder, multi-layer metal technology, applied in the production field of multi-layer metal mesh and metal powder composite filter, can solve the problems of filter system failure, low pressure, filter rupture, etc. The effect of strong pressure capacity and low filter resistance

Active Publication Date: 2011-05-18
王东伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, for ordinary filters, such as various paper filters and metal mesh filters, there are often such contradictions: under the condition of large filtration flux, the filtration accuracy is often not high, when high-precision filtration is required , this kind of filter obviously cannot meet the practical requirements in terms of filtering accuracy
[0003] In order to achieve the purpose of high-precision filtration, metal powder tube filters and ceramic tube filters have been developed abroad. The filtration accuracy of these filters has been significantly improved. However, due to t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Take one sheet of 100 mesh with a length of 1000mm and a width of 500mm, two sheets of 40 mesh, and two sheets of 12 mesh. Layers of wire mesh are arranged neatly and superimposed, and then boundary butt welding is performed. Put it into a vacuum furnace after welding, and carry out sintering treatment at 1000-1600°C to obtain a support layer; after cooling and taking out the support layer, take 1-2 kg of stainless steel 316L powder with a particle size of 100-200 mesh, add 0.1%- 20% molding agent, mixed in the mixing equipment for 1-3 hours and taken out, the mixing equipment is V-shaped mixing equipment, double cone mixer or ball mill, and then cast on the re-sintered 5-layer mesh support layer The mixed stainless steel powder has a thickness of 1-5mm, and then the composite structure is put into a vacuum furnace, sintered at 1000-1600°C for secondary sintering treatment, and after cooling and taken out, a composite filter of multi-layer metal mesh and meta...

Embodiment 2

[0024] Example 2: Take 1 sheet of 500 mesh, 2 sheets of 40 mesh, and 2 sheets of 12*64 mesh with a length of 1000mm and a width of 500mm. From top to bottom, they are 500 mesh, 40 mesh, 40 mesh, 12*64 mesh, 12* 64 mesh, the 5 layers of wire mesh are arranged neatly and superimposed, and then boundary welding is performed. Put it into a vacuum furnace after welding, and carry out sintering treatment at 1000-1600 ° C to obtain a support layer; take out the support layer after cooling, and then take 1-2 kg of stainless steel 316L powder with a particle size of 400-500 mesh, add 0.1 %-20% molding agent, mixed in the mixing equipment for 1-3 hours and then taken out, the mixing equipment is V-type mixing equipment, double cone mixer or ball mill, and then supported by re-sintered 5-layer mesh Cast the mixed stainless steel powder on the layer with a thickness of 1-5mm, then put the composite structure into a vacuum furnace, sinter at 1000-1600°C for secondary sintering treatment, t...

Embodiment 3

[0025] Embodiment 3: Get the metal nickel mesh of length 1000mm, width 500mm, wherein 1 sheet of 100 orders, 1 sheet of 40 orders, 2 sheets of 10 orders, from top to bottom are successively 100 orders, 40 orders, 10 orders, 10 orders, will These 4 layers of wire mesh are neatly arranged and stacked, and then boundary welding is performed. Put it into a vacuum furnace after welding, and carry out sintering treatment at 1000-1600 ° C to obtain a support layer; take out the support layer after cooling, and then take 1-2 kg of metal nickel powder with a particle size of 100-200 mesh, add 0.1 %-20% molding agent, mixed in the mixing equipment for 1-3 hours and then taken out, the mixing equipment is V-type mixing equipment, double cone mixer or ball mill, and then supported by the re-sintered 4-layer mesh The mixed metal nickel powder is cast on the layer with a thickness of 1-5mm, and then the composite structure is put into a vacuum furnace, sintered at 1000-1600°C for secondary ...

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Abstract

The invention relates to a method for producing compound filter of multi-layer metal meshes and metal powder, which comprises the steps of weaving metal wires to obtain metal meshes with different mesh numbers; laminating the metal meshes with different mesh numbers to obtain a laminated layer structure, wherein the mesh numbers of the laminated layers from one side to the other side increase continuously and the number of laminated layers is 2-6; then placing the laminated layer structure in a vacuum furnace and sintering at 1000-1600 DEG C to obtain a multiple support layers; then cooling and taking out of the support layers, manufacturing a metal compound layer of 100-600 meshes on one side of the support layer of high mesh by means of electrostatic spraying and curtain coating, controlling the thickness of the compound layer with 0.1-0.5mm and then sintering at 1000-1600 DEG C, cooling and taking out of the compound layer to obtain the compound filter of multi-layer metal meshes and metal powder. The compound filter has the advantages of low filtering resistance, large filter flux and strong bearing capacity and can be widely applied to industrial fields of chemical engineering, medicine, power generation,metallurgy, food and the like.

Description

technical field [0001] The invention belongs to the technical field of filter equipment production, and relates to a production method of a multilayer metal mesh and metal powder composite filter widely used in chemical industry, medicine, power generation, metallurgy, food and other industrial fields. The multilayer metal mesh and metal powder Composite filters are especially suitable for filtering high-temperature gases in petrochemical industry, purifying high-temperature flue gas in metallurgical industry, filtering and recycling catalysts in petrochemical industry, and purifying dust and exhaust gas in thermal power generation and nuclear power generation industries. Background technique [0002] The requirements for the filter material are to have as large a filtration flow as possible, and at the same time, the filter itself should have a small filtration resistance, so as to reduce energy consumption. However, in practice, for ordinary filters, such as various paper ...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F7/04B01D39/20
Inventor 王东伟
Owner 王东伟
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