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Production method of metal fibrofelt

A technology of metal fiber felt and metal fiber, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of small filtration pressure difference, easy clogging, and small filtration flux

Inactive Publication Date: 2011-05-25
王东伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current filter system currently used in practice, there is a metal mesh filter with a large filtration flux and a small filtration pressure difference. However, this filter is a filter material that belongs to the principle of surface filtration. Due to the limitation of mesh diameter and weaving technology, its filtration is suitable for the filtration of coarse particles, but it cannot be realized due to the limitation of its own characteristics for very fine particles.
Of course, the filters with high filtration precision include metal powder tube filter and ceramic powder tube filter. However, due to their high filtration precision and surface filtration principle, they are easy to be blocked, and the backwashing system is complicated, and the filtration flux per unit filtration area also smaller

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Take 1.000 kilograms of stainless steel 316L metal fibers with a wire diameter of 20um, cut them into short fibers with a length of 3-6cm, and then use a metal fiber felting machine to make a single fiber with a thickness of 3-5mm, a length of 1600mm, and a width of 1250mm. 3 layers of metal fiber felts. After superimposing these 3 metal fiber felts, put them into a vacuum furnace, sinter at 1100-1300 ° C, keep warm for 1-5 hours, and after cooling, use a rolling mill to roll to a thickness of 0.7mm. A finished product of metal fiber felt with a uniform thickness and a filtration precision of 75um is obtained.

Embodiment 2

[0012] Example 2: Take 0.3 kg of stainless steel 316L metal fiber with a wire diameter of 8um, cut it into short fibers with a length of 3-6cm, and then make it through a metal fiber felting machine to obtain a metal fiber with a thickness of 3-5mm, a length of 1600mm, and a width of 1250mm. 1 piece of single-layer metal fiber felt; take 0.3 kg of stainless steel 316L metal fibers with wire diameters of 12um and 20um according to the same steps above, cut them into short fibers of 3-6cm long, and then make them through a metal fiber felting machine , to obtain a single-layer metal fiber felt with a thickness of 3-5mm, a length of 1600mm and a width of 1250mm; then, after superimposing the above-mentioned 3 metal fiber felts, sintering is carried out at 1100-1300°C in a vacuum furnace and kept for 1 -5 hours, after cooling, use a rolling mill to roll to a thickness of 0.7mm to obtain a finished product of metal fiber felt with a uniform thickness and a filtration accuracy of 2...

Embodiment 3

[0013] Example 3: Take 0.3 kg of stainless steel 304 metal fiber with a wire diameter of 8um, cut it into short fibers with a length of 3-6cm, and then make it through a metal fiber felting machine to obtain a single layer with a thickness of 3-5mm, a length of 1600mm and a width of 1250mm 1 piece of metal fiber felt; Get 0.3 kilograms according to above-mentioned same step respectively, wire diameter is respectively the stainless steel 304 metal fiber of 12um and 20um, is cut into the long short fiber of 3-6cm, then is made by metal fiber felting machine, obtains 1 piece of single-layer metal fiber felt with a thickness of 3-5mm, a length of 1600mm, and a width of 1250mm; then, after superimposing the above three pieces of metal fiber felt, sinter in a vacuum furnace at 1100-1300°C and keep warm for 1-5 Hours, after cooling, use a rolling mill to roll to a thickness of 0.7 mm to obtain a finished metal fiber felt with a uniform thickness and a filtration accuracy of 20 um. ...

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Abstract

The invention relates to a production method of a metal fibrofelt, which comprises the steps that: metal wires or metal alloys are made into metal fibers, then the metal fiber is chopped to obtain chopped fiber, according to the requirement of filter fineness, metal fibers with different wire diameters are treated by the felt coating method of a felt coater to obtain a single-layered porous metal fibrofelt; meanwhile, one layer or more layers of the obtained single-layered porous metal fibrofelt is / are overlaid, and then is / are placed into a vacuum sintering furnace or is sintered under protective atmosphere with reducibility, wherein the sintering temperature is 1100-1500 DEG C, and the temperature holding time is 1-5 hours; and after the sintered metal fibrofelt is cooled, the metal fibrofelt with a certain porosity can be obtained, and then the sintered metal fibrofelt is pressed by a rolling mill to adjust the thickness of the fibrofelt to obtain the metal fibrofelt finished product with specified thickness. The metal fibrofelt has good combination property and the method can be widely applied to the industrial fields of chemical industry, 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 metal fiber felt widely used in industrial fields such as chemical industry, medicine, power generation, metallurgy and food. Filtration, purification of high-temperature flue gas in metallurgical industry, filtration and recovery of catalysts in petrochemical industry, and dust and tail gas purification 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 the current filter system currently used in practice, there is a metal mesh filter with a large filtration flux and a small filtration pressure difference. However, this filter is a filter material that belongs to the pr...

Claims

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Application Information

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