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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 example, the strength of the ceramic membrane on the porous metal membrane tube substrate is not high after co-sintering, and it is easy to fall off during use, resulting in The product life is short, and the machinability of porous filter membrane tubes composited with ceramic membranes is poor; in addition, the method of preparing metal filter membrane tubes by centrifugal deposition is complicated and not suitable for large-scale industrial production

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

Embodiment 1

[0026] The stainless steel fiber felt that filter precision is 20um is packed in the groove 7 that comprises charging port 1, charging port 2 and the molding die of mandrel (see image 3 ), after the mandrel and the rubber sleeve are fixed, load -180~300 mesh stainless steel powder into the charging port 1, and at the same time load the -300 mesh stainless steel powder into the charging port 2. During the charging process, it must be ensured The powder height of coarse powder and fine powder in the mold is alternately increased in order to ensure the uniformity of the thickness of different powder gradient layers. Put the loaded powder together with the mold into the cold isostatic press for compression molding, and then take it out for demoulding ; This asymmetric stainless steel filter membrane tube green body is sintered in a vacuum furnace at a sintering temperature of 1200 ° C. During sintering, the temperature is raised at a low speed at a specific temperature to prevent ...

Embodiment 2

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

Embodiment 3

[0030] The stainless steel fiber felt that filter precision is 20um is packed in the groove 7 of mould, see image 3 , after the mandrel and the rubber sleeve are fixed, load -300 mesh stainless steel powder into the charging port 1, and at the same time load -180 ~ 300 mesh stainless steel powder into the charging port 2. During the charging process, it is necessary to ensure that the coarse The powder height of powder and fine powder in the mold increases alternately in order to ensure the uniformity of different powder gradient layers. Put the loaded powder together with the mold into the isostatic press to form it, and then take it out for demoulding; the asymmetric stainless steel filter membrane tube green body is sintered in the hydrogen atmosphere of the hydrogen furnace, the sintering temperature is 1200°C, and the A low-speed heating is carried out at a specific temperature to prevent the sample from cracking; finally, an asymmetric stainless steel filter membrane tu...

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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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