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Production method of metal powder coating stainless-steel fibrofelt with nanometer-level filtering accuracy

A technology of metal powder and filtration precision, which is applied in the direction of filtration separation, separation methods, chemical instruments and methods, etc., can solve the problems of unreachable operating temperature, high cost of filtration equipment, limitation of filtration precision of filter materials, etc., and achieve high filtration precision Effect

Active Publication Date: 2013-11-27
王东伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Filtration of precious metal catalysts in the petrochemical industry and lubricating oil filtration in the processing of precision rolling mills have very strict requirements for filtration, and the requirements for interception of particulate matter are very high, and the size of the particulate matter, most of the particulate matter The particle size is even less than 100 nanometers, and the operating temperature is often very high, even exceeding 100°C. Under such conditions, ordinary filter materials cannot meet the operating requirements due to the limitation of filtration accuracy or operating temperature.
At present, the only filter material that can meet these requirements is the ceramic membrane filter, but the ceramic membrane filter cannot be prepared into a large-area membrane and requires a large number of filter elements to meet the requirements, which makes the cost of the filter equipment extremely high. expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 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 to 6 cm, and then make it through a metal fiber felting machine to obtain a single fiber with a thickness of 3 to 5 mm, a length of 1600 mm, and a width of 1250 mm. 1 layer of metal fiber felt; according to the same steps above, get 0.3 kilograms and stainless steel 304 metal fibers with a wire diameter of 12um and 20um respectively, cut into short fibers of 3-6cm length, and then make them through a metal fiber cloth felt machine. 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, sinter them in a vacuum furnace at 1100-1300°C and keep warm for 1-200°C. 5 hours, after cooling, use rolling mill to roll to 0.7mm thick, obtain the finished product of 304 stainless steel metal fiber felts with uniform thickness; Then spray 1000 mesh ...

Embodiment 2

[0024] Take 0.3 kg of stainless steel 316LL metal fiber with a wire diameter of 8um, cut it into short fibers with a length of 3 to 6 cm, and then make it through a metal fiber felting machine to obtain a single layer with a thickness of 3 to 5 mm, a length of 1600 mm and a width of 1250 mm 1 piece of metal fiber felt; Get 0.3 kilograms according to the above-mentioned same steps, and the stainless steel 316L metal fiber that wire diameter is respectively 12um and 20um, be cut into the long short fiber of 3~6cm, then make by metal fiber felting machine, obtain 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-mentioned 3 pieces of metal fiber felt, sinter in a vacuum furnace at 1100-1300°C and keep warm for 1-5 Hours, after cooling, use rolling mill to roll to 0.5mm thick, obtain the 316L stainless steel metal fiber felt finished product of uniform thickness; Carry out sintering in...

Embodiment 3

[0026] Take 0.3 kg of titanium metal fiber with a wire diameter of 8um, cut it into short fibers with a length of 3 to 6 cm, and then make it through a metal fiber felting machine to obtain a single fiber with a thickness of 3 to 5 mm, a length of 1600 mm, and a width of 1250 mm. 1 layer of metal fiber felt; sintered in a vacuum furnace at 800-1300°C, heat preservation for 1-5 hours, after cooling, use a rolling mill to roll to a thickness of 0.3mm to obtain a finished product of metal titanium fiber felt with uniform thickness; then The fiber mat is sprayed with 1000-mesh metal titanium powder, and the thickness of the coating is controlled to 0.1mm. It is sintered in a vacuum furnace at 800-1300°C and kept for 1-5 hours. After cooling, it is rolled to a thickness of 0.3mm by a rolling mill. A finished product of metal titanium powder-coated fiber felt with a uniform thickness and a filtration precision of 0.5 um is obtained.

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Abstract

The invention relates to a production method of a metal powder coating stainless-steel fibrofelt with nanometer-level filtering accuracy, comprising the following steps of: firstly processing a metal fibrofelt; then manufacturing a multilayer composite fibrofelt; then sintering to obtain a metal net fibrofelt composite filter disc product; finally pressing, spraying, and sintering in a vacuum sintering furnace to obtain a powder coating metal fibrofelt product with the nanometer-level filtering accuracy. The metal fibrofelt with a coating not only has low filtration resistance of the metal fibrofelt, but also can obtain an oversized filtering area through unfolding, has high filtering accuracy and mechanics index, is an ideal filter material during high-precision filtration, can meet the requirements on filter materials during the lubricating oil filtration in the processing process of a noble metal catalyst filtration and a precision rolling mill used under the condition of high temperature in a petrochemical industry and is metal powder coating nanometer-level filtering equipment widely applied to the industrial fields of chemical industry, medicines, power generation, metallurgy, foods, and the like.

Description

technical field [0001] The invention belongs to the technical field of filter equipment production, and relates to a metal powder coating nanoscale filter widely used in chemical industry, medicine, power generation, metallurgy, food and other industrial fields for precise filtering of hydraulic oil and lubricating oil of industrial machinery and equipment The production method of precision stainless steel fiber felt. Background technique [0002] Filtration of precious metal catalysts in the petrochemical industry and lubricating oil filtration in the processing of precision rolling mills have very strict requirements for filtration, and the requirements for intercepting particulate matter are very high, and the size of the particulate matter, most of the particulate matter The particle size is even less than 100 nanometers, and the operating temperature is often very high, even exceeding 100°C. Under such conditions, ordinary filter materials cannot meet the operating requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/10
Inventor 王东伟
Owner 王东伟
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