Asymmetrical stainless steel filter membrane tube and production method thereof

A stainless steel, asymmetric technology, used in chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of low strength, complex methods, short product life, etc., to improve the sintering yield and improve the permeability coefficient, the effect of ensuring the filtering accuracy

Active Publication Date: 2013-03-13
江苏云才材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for gradient metal porous filter membrane tubes, under the premise of ensuring the permeation performance, people usually spray or brush a layer of ceramic or metal porous membrane on the surface of the porous metal membrane tube substrate to achieve the control of filtration accuracy, or directly Continuous gradient metal filter membrane tubes are prepared by centrifugal deposition, but these methods have certain disadvantages. For exam

Method used

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  • Asymmetrical stainless steel filter membrane tube and production method thereof
  • Asymmetrical stainless steel filter membrane tube and production method thereof
  • Asymmetrical stainless steel filter membrane tube and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Put the stainless steel fiber felt with a filtration accuracy of 20um into the groove 7 of the forming mold containing the charging port 1, the charging port 2 and the core rod (see image 3 ), after fixing the mandrel and rubber sleeve, load -180~300 mesh stainless steel powder into the charging port 1, and at the same time load -300 mesh stainless steel powder into the charging port 2. It must be ensured during the charging process The powder height of the coarse powder and the fine powder in the mold increases in an orderly manner to ensure the uniformity of the thickness of the different powder gradient layers. Put the filled powder and the mold into the cold isostatic press for molding, and then remove the mold. ; Sinter the green asymmetric stainless steel filter membrane tube in a vacuum furnace at a sintering temperature of 1200℃. During sintering, a low-speed heating is performed at a specific temperature to prevent the sample from cracking; fig...

Example Embodiment

[0027] Example 2

[0028] Put the stainless steel fiber felt with a filtration accuracy of 20um into the groove 7 of the mold, see image 3 After the mandrel and rubber sleeve are fixed, the stainless steel powder of -180~340 mesh is loaded into the loading port 1, and the stainless steel powder of -340 mesh is loaded into the loading port 2. The coarseness must be ensured during the charging process. The powder height of powder and fine powder in the mold increases alternately to ensure the uniformity of different powder gradient layers. Put the filled powder together with the mold into a cold isostatic press for compression molding, and then take it out of the mold; the asymmetric stainless steel filter membrane tube green body is sintered in a vacuum furnace at a sintering temperature of 1150°C. A low-speed heating is performed at a specific temperature to prevent the sample from cracking; finally, an asymmetric stainless steel filter membrane tube is obtained.

Example Embodiment

[0029] Example 3

[0030] Put the stainless steel fiber felt with a filtration accuracy of 20um into the groove 7 of the mold, see image 3 After the mandrel and rubber sleeve are fixed, the -300 mesh stainless steel powder is loaded into the loading port 1, and the -180 to 300 mesh stainless steel powder is loaded into the loading port 2. The coarseness must be ensured during the filling process. The powder height of powder and fine powder in the mold increases alternately to ensure the uniformity of different powder gradient layers. Put the filled powder together with the mold into an isostatic press for compression molding, and then take it out of the mold; the asymmetric stainless steel filter membrane tube green body is sintered in a hydrogen atmosphere in a hydrogen furnace, and the sintering temperature is 1200℃. A low-speed heating is performed at a specific temperature to prevent the sample from cracking; finally, an asymmetric stainless steel filter membrane tube is o...

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Abstract

The invention provides an asymmetrical stainless steel filter membrane tube and a production method thereof. The asymmetrical stainless steel filter membrane tube produced by the production method for the asymmetrical stainless steel filter membrane tube comprises a support layer and a control layer and is characterized by further comprising stainless steel fiber felts between the support layer and the control layer. According to the asymmetrical stainless steel filter membrane tube disclosed by the invention, the stainless steel fiber felts are additionally arranged among different powder layers, so that the filtering precision and the filtering performance of the filtering tube in performance are ensured; and meanwhile, the problems of cracking, peeling and the like of the stainless steel filter membrane with mutant fluctuant gradient in the sintering process are solved to the great degree.

Description

technical field [0001] The invention relates to a metal filter tube and a preparation method thereof, in particular to an asymmetric stainless steel filter membrane tube and a preparation method thereof. Background technique [0002] As an important member of the porous material family, porous metal materials have been widely used in functional fields such as filtration, separation, and fluid distribution in the fields of petrochemical, energy, environmental protection, food, and pharmaceuticals due to their unique properties. It is an indispensable key material to achieve technological breakthroughs. Porous metal materials have good permeability, controllable pores and pore sizes, stable shape, high temperature resistance, regeneration, and machinability. They are functional materials that cannot be replaced by other porous materials in some special industrial fields. [0003] With the rapid development of modern industry, the requirements for the performance of filter mat...

Claims

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Application Information

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IPC IPC(8): B22F5/12B22F5/10B22F3/16B32B15/04B32B15/14B32B15/18B32B5/24B32B5/02
Inventor 刘忠军
Owner 江苏云才材料有限公司
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