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Method for manufacturing power-sintered filtering plate with strengthening phases and asymmetric structures

An asymmetric structure and production method technology, applied in the industrial field, can solve the problems of filter system failure, low pressure, filter rupture, etc., and achieve the effect of large filtration flux, strong pressure bearing capacity and low filter resistance

Active Publication Date: 2012-09-05
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 their brittleness and heat resistance Low shock capacity, so it can only be used in low temperature conditions, and it is easy to damage itself, and the production is difficult and the price is high
Although the metal powder tube filter has a greatly increased operating temperature, and some filters even exceed 1000 ° C, it also has the disadvantage of low pressure
In petrochemical and steel industry applications, since filters work in high-pressure and high-temperature environments, some filters often break, which leads to the failure of the entire filter system, which brings huge losses to production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Take 1.000 kg of stainless steel 316L powder with a particle size of 30-100 mesh, add 0.1%-20% of forming agent, mix it in the mixing equipment for 1-3 hours, and take it out. The mixing equipment is V-shaped mixing equipment, double cone mixer Feeder or ball mill, and then through the tape casting machine to get the green powder sheet, degrease treatment in a vacuum furnace at a temperature of 300-600 ° C, and then apply 40 mesh 316L stainless steel mesh on the green powder sheet, put it in the vacuum furnace , sintering at 1000-1600°C to obtain a powder sheet support layer and a composite support layer containing a strengthening phase and a certain porosity; The thickness of the coating is 0.1-0.5 mm, and then sintered at 1000-1600 DEG C, cooled and taken out to obtain an asymmetric structure powder sintered filter material with a strengthening phase.

Embodiment 2

[0030] Example 2: Take 1.000 kg of Hastelloy powder with a particle size of 30-100 mesh, add 0.1%-20% of forming agent, mix it in the mixing equipment for 1-3 hours, take it out, and then pass it through the casting machine to get the powder sheet green embryo. Degreasing treatment is carried out in a vacuum furnace at 300-600°C, and then the green powder sheet is covered with 40 mesh 316L stainless steel mesh, put into a vacuum furnace, and sintered at 1000-1600°C to obtain a reinforced phase and a certain porosity. Powder sheet support layer and composite support layer, after cooling the support layer, use electrostatic spraying method to spray 200-600 mesh coating, control the thickness of the coating to 0.1-0.5mm, and then sinter at 1000-1600°C, Cool and take out to obtain asymmetric structure powder sintered filter material with strengthening phase.

Embodiment 3

[0031] Example 3: Take 1.000 kg of 30-100 mesh stainless steel 316L powder, add 0.1%-20% forming agent, mix it in the mixing equipment for 1-3 hours, take it out, and then pass it through the casting machine to get the powder sheet green embryo, at a temperature of 300- Degreasing treatment is carried out in a vacuum furnace at 600°C, and then 40-mesh 316L stainless steel mesh is applied on the green powder sheet, put into a vacuum furnace, and sintered at 1000-1600°C to obtain a powder sheet support with a strengthening phase and a certain porosity layer and composite support layer; after the support layer is cooled and taken out, use the method of electrostatic spraying to spray a coating of 200-600 mesh, control the thickness of the coating to 0.1-0.5mm, then sinter at 1000-1600°C, and take it out after cooling to obtain Asymmetric structure powder sintered filter material with strengthening phase.

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Abstract

The invention relates to a method for manufacturing a power-sintered filtering plate with strengthening phases and asymmetric structures, comprising the following steps: adding 0.1-30wt% of forming agent to metal powder, mixing the forming agent with the metal powder for 1-3 hours in mixing equipment, and taking out the mixture; processing the mixture with a tape casting machine to obtain a powder plate blank, degreasing the powder plate blank in a vacuum furnace of 300-600 DEG C, covering the powder plate blank by a metal gauze, putting the powder plate blank into the vacuum furnace, and sintering at 1,000-1,600 DEG C to obtain a powder plate support layer and a compound support layer with strengthening phases and certain porosity; cooling the support layers, taking out, and spraying a coating of 200-600 meshes with the electrostatic spraying method, wherein the thickness of the coating is controlled at 0.1-0.5 mm; and sintering at 1,000-1,600 DEG C, cooling and taking out to obtain the product. The power-sintered filtering plate with the strengthening phases and the asymmetric structures has the characteristics of low filtering resistance, high filtering flux and strong pressurebearing capacity and can be widely applied to the fields of chemical industry, medicine industry, power generation industry, metallurgical industry, food industry 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 an asymmetric powder sintered filter sheet with a strengthening phase, which is widely used in chemical industry, medicine, power generation, metallurgy, food and other industrial fields. The structural powder sintered filter is especially suitable for filtering high-temperature gas in the petrochemical industry, purification of high-temperature flue gas in the metallurgical industry, filtration and recovery of catalysts in petrochemical industry, and dust and tail gas in thermal power generation and nuclear power generation industries purify. 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 variou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20
Inventor 王东伟
Owner 王东伟