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Sintered metal fiber filtering material and preparation method thereof

A sintered metal and fiber filtration technology, applied in filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems of small pollution holding capacity, high cost, shortened service life of the filter element, etc., and achieve high filtration accuracy and flux. The effect of large and strong dirt holding capacity

Active Publication Date: 2013-06-26
苏州海普过滤分离科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the filter element widely used in the lubricating oil system of the finishing mill in the iron and steel metallurgy industry is a glass fiber filter element, most of which are imported from abroad, and the cost is relatively high
However, this type of filter element has a small dirt holding capacity and poor water resistance, and it can only be used once and cannot be recycled.
Especially when the lubrication system of the rolling mill is flooded with more water, the service life of the filter element is greatly shortened
At the same time, the filtration accuracy and fluid flux of the glass fiber filter element will also be reduced.
More serious cases may also cause deformation and breakdown of the filter element, thus affecting the safe operation of the finishing mill equipment

Method used

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  • Sintered metal fiber filtering material and preparation method thereof
  • Sintered metal fiber filtering material and preparation method thereof
  • Sintered metal fiber filtering material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A sintered metal fiber filter material, which is composed of three layers of sintered metal fiber mats. The sintered metal fiber felts of each layer decrease in pore size from large to small along the direction of fluid inflow, and finally form a thickness of 0.8mm. The porosity 82%, the filter precision is 20μm composite filter material layer.

[0026] The preparation method of the above-mentioned sintered metal fiber filter material is as follows: the grades of 316L stainless steel fibers with diameters of 8 μm, 12 μm and 20 μm are cut into short fibers with a length of 3.5 cm by an automatic fiber cutter; Fibers with a diameter of 8 μm were prepared by Lando air-flow deposition method with a unit weight of 300 g / m 2 The soft metal fiber felt is then properly compacted with a two-roller press; then the fibers with a diameter of 12 μm and 20 μm are prepared by the Lando airflow deposition method into a unit weight of 300 g / m 2 The soft and soft metal fib...

Embodiment 2

[0027] Embodiment 2: A sintered metal fiber filter material, which is composed of three layers of sintered metal fiber mats. The sintered metal fiber mats of each layer decrease in pore size from large to small along the direction of fluid inflow, and finally form a thickness of 0.8mm. The porosity 84%, the filter accuracy is 40μm composite filter material layer.

[0028] The preparation method of the above-mentioned sintered metal fiber filter material is as follows: first cut the 316L stainless steel fibers with a diameter of 20 μm, 30 μm and 40 μm into short fibers with a length of 4.0 cm with an automatic fiber cutter; Fibers with a cm diameter of 20 μm and a unit weight of 300 g / m were prepared by Lando air-flow deposition 2 The soft metal fiber felt is then properly compacted by a two-roller press; and then the fibers with a diameter of 30 μm and 40 μm are prepared by the Lando airflow deposition method into a unit weight of 300 g / m 2 The soft metal fiber mats are compa...

Embodiment 3

[0029]Embodiment 3: A sintered metal fiber filter material, which is composed of three layers of sintered metal fiber mats. The sintered metal fiber mats of each layer decrease in pore size from large to small along the direction of fluid inflow, and finally form a thickness of 0.78mm. The porosity 80%, the filter precision is 10μm composite filter material layer.

[0030] The preparation method of the above-mentioned sintered metal fiber filter material is as follows: the 316L stainless steel fiber with a diameter of 4 μm, 8 μm and 12 μm is cut into short fibers with a length of 3.0 cm by an automatic fiber cutter, and then the fiber with a length of 3.0 cm Fibers with a cm diameter of 4 μm and a unit weight of 200 g / m were prepared by Lando air-flow deposition 2 The soft metal fiber mat is then properly compacted with a two-roller press, and then the fibers with a diameter of 8 μm and 12 μm are prepared by the Lando air-flow deposition method into a unit weight of 350 g / m 2...

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Abstract

The invention discloses a sintered metal fiber filtering material comprising at least two sintered metal fiber felt layers, wherein the pore size of each sintered metal fiber felt layer is decreased layer by layer along the fluid inflowing direction. A preparation method of the sintered metal fiber filtering material includes the steps of shearing into short fibers; feeding the short fibers into a feeding device of a clothing felt machine to produce a soft metal fiber felt by utilizing an airflow depositing principle, and then compacting; overlying two to four metal fiber felt layers with different unit felt weights and filtering precisions according to the filtering precision from small to large so as to form a composite metal fiber felt, then placing the composite metal fiber felt into a vacuum sintering furnace for sintering, and cooling after sintering, wherein a sintering isolation material is arranged between the two adjacent composite metal fiber felts; and finally, flattening the metal fiber felts which are sintered into one body and pressing the metal fiber felts to have certain thickness. The obtained sintered metal fiber filtering material with a multi-layer structure has the characteristics of high filtering precision, strong assimilative capacity and high flux.

Description

technical field [0001] The invention relates to a filter material and a preparation method thereof, in particular to a sintered metal fiber filter material and a preparation method thereof. Background technique [0002] At present, various filter materials are used in a very wide range of technical fields, such as petrochemical, polyester fiber, iron and steel metallurgy, biomedicine, food and beverage, and thermal power generation industries. In terms of materials, filter materials can be divided into two categories: inorganic and organic. Inorganic filter materials mainly include metal filter materials and ceramic filter materials. The main application fields of inorganic filter materials are high temperature resistant, high pressure resistant and highly corrosive environments. For example, metal membranes or ceramic membranes are used to recover expensive catalysts in the catalytic cracking process of petrochemical industry; nuclear power plants also use metal membranes...

Claims

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Application Information

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IPC IPC(8): B01D39/20B22F3/11B22F7/02
Inventor 徐小平
Owner 苏州海普过滤分离科技有限公司
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