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Activating and sintering preparation method of a metal composite porous membrane tube

A metal composite, activated sintering technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of low service life of FeAl-based filter elements, high preparation cost of metal microporous membrane, and easy condensation of coal tar. Achieve the effect of easing the contradiction between high permeability and high filtration accuracy, prolonging stable operation time and improving the overall filtration effect

Active Publication Date: 2019-10-22
广州赛隆增材制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the characteristics of high dust content in medium and low temperature pyrolysis gas and easy condensation of coal tar, the FeAl-based filter elements made by cold isostatic pressing have problems such as low filtration accuracy and poor back-blowing regeneration performance. This further leads to the low service life of the FeAl-based filter element, and it is difficult to meet the design requirements; at the same time, the high preparation cost and limited variety specifications of the metal microporous membrane cannot meet the industrialization and application, especially in harsh media environments and such as high temperature , complex multiphase environment and other new fields

Method used

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  • Activating and sintering preparation method of a metal composite porous membrane tube
  • Activating and sintering preparation method of a metal composite porous membrane tube
  • Activating and sintering preparation method of a metal composite porous membrane tube

Examples

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Embodiment 1

[0024] In this specific example 1, a Fe20Cr5Al fiber tube with a filtration accuracy of 20 μm, a diameter of 80 mm, a height of 500 mm, and a thickness of about 2 mm was used as the base tube (provided by the Northwest Nonferrous Metal Research Institute) to prepare the Fe20Cr5Al composite porous membrane tube.

[0025] The invention relates to an activation sintering preparation method of a metal composite porous membrane tube, which comprises the following steps:

[0026] Step 1. Prepare metal powder slurry.

[0027] Using commercially available Fe20Cr5Al metal powder with a particle size of 20-30 μm or above 80% is added to an organic solvent, and then uniformly stirred with a stirrer for 30 minutes to prepare a metal powder slurry. Wherein, the weight ratio of the Fe20Cr5Al metal powder to the organic solvent is 3:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0028] Step two, spraying of metal powder slurry.

[...

Embodiment 2

[0039] In this specific example 2, a Ni16Cr5Al powder tube with a filtration accuracy of 5 μm, a diameter of 60 mm, a height of 1000 mm, and a thickness of about 2.5 mm was used as the base tube (provided by the Northwest Nonferrous Metal Research Institute) to prepare a Ni16Cr5Al composite porous membrane tube.

[0040] The invention relates to an activation sintering preparation method of a metal composite porous membrane tube, which comprises the following steps:

[0041] Step 1. Prepare metal powder slurry.

[0042] The commercially available Ni16Cr5Al metal powder with a particle size of 0.2-22 μm or more is used, added to the organic solvent, and then uniformly stirred with a stirrer for 40 minutes to prepare a metal powder slurry. Wherein, the weight ratio of the Ni16Cr5Al metal powder to the organic solvent is 1:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0043] Step two, spraying of metal powder slurry. ...

Embodiment 3

[0054] In this specific example 3, a Ni16Cr5Al powder tube with a filtration accuracy of 5 μm, a diameter of 60 mm, a height of 1000 mm, and a thickness of about 2.5 mm was used as the base tube (provided by the Northwest Nonferrous Metal Research Institute) to prepare a Ni16Cr5Al composite porous membrane tube.

[0055] The invention relates to an activation sintering preparation method of a metal composite porous membrane tube, which comprises the following steps:

[0056] Step 1. Prepare metal powder slurry.

[0057] The commercially available Ni16Cr5Al metal powder with a particle size of 0.2-22 μm or more is used, added to the organic solvent, and then uniformly stirred with a stirrer for 40 minutes to prepare a metal powder slurry. Wherein, the weight ratio of the Ni16Cr5Al metal powder to the organic solvent is 1:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0058] Step two, spraying of metal powder slurry. ...

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Abstract

The invention provides an activating and sintering preparation method of a metal composite porous membrane tube. The method comprises the following steps: Step 1: adding Fe20Cr5Al or Fe3Al or Ni16Cr5Al metal powder into a polyvinyl alcohol or terpineol or carbon tetrachloride or glycerin organic solvent to obtain metal powder slurry; Step 2, spraying the metal powder slurry onto the outer surfaceof a base tube, and drying the outer surface to form a porous layer of metal powder; Step 3, preparing an activator; Step 4, spraying the activator onto the outer surface of the porous layer of metalpowder, and drying the outer surface to obtain a metal composite porous membrane tube; Step 5, sintering the metal composite porous membrane tube in a vacuum furnace. According to the activating and sintering preparation method disclosed by the invention, the mechanical properties and high permeability of the base tube are combined with the filtration performance of the membrane layer, and throughthe control of the thickness of the membrane layer, the contradiction between the gas permeability and the filtration precision is resolved, equipment is simple, operation steps are simple, and the use effect is good.

Description

Technical field [0001] The invention relates to the technical field of porous metal materials and their preparation, in particular to an activation sintering preparation method of a metal composite porous membrane tube. Background technique [0002] The use temperature of the metal-based microporous membrane can be as high as 600℃ or higher, and it can purify high-temperature dust-containing gas under high temperature conditions to a dust concentration of less than 10mg / m 3 The filtration accuracy is as high as 0.1μm, and the filtration pressure drop can be controlled within tens of kilopascals. Therefore, the metal microporous membrane has become a new type of separation medium with high separation efficiency, low energy consumption, long life, and easy A series of unique advantages, such as cleaning and corrosion resistance, have been widely used in food, beverage, chemical, metallurgy, materials, environmental protection and other industries. [0003] At the same time, metal mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/10B01D69/02B01D71/02
CPCB01D67/0041B01D69/10B01D69/02B01D71/022B01D2325/24
Inventor 汪强兵李广忠郭瑜孙涛
Owner 广州赛隆增材制造有限责任公司
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