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Preparation method of filtering material used for welding fume

A filter material, welding fume technology, applied in the direction of filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems of poor adsorption and dust removal performance, and achieve the effects of low development difficulty, wide distribution, non-toxic and harmless biological activity

Active Publication Date: 2015-12-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor adsorption and dust removal performance in the existing welder dust masks; and to provide a preparation method for the filter material of welding fumes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific embodiment 1: This embodiment is a method for preparing a filter material for welding fume, which is specifically completed according to the following steps:

[0017] 1. Preparation of medical stone powder: using massive medical stone as a raw material, grinding the massive medical stone to obtain medical stone powder;

[0018] 2. Preparation of medical stone nano-sized particles: the medical stone powder is dissolved and recrystallized by hydrothermal method to prepare medical stone nano-sized particles;

[0019] 3. Surface modification: use silane coupling agent to modify the surface of medical stone nano-scale particles to obtain surface-modified particles;

[0020] 4. Heating and blending: heating and blending high polymer polypropylene and surface-modified particles at a temperature of 180-220°C to obtain a high-polymer compound; said high-polymer polypropylene and surface-modified particles The volume ratio is 8:1;

[0021] 5. Carbonization: Heat the high polymer ...

specific Embodiment approach 2

[0031] Embodiment 2: The difference between this embodiment and Embodiment 1 is: in step 1, the massive medical stone is used as a raw material to grind the massive medical stone to obtain medical stone powder with a particle size of 1 μm to 100 μm body. Others are the same as the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: in step two, a NaOH solution with a concentration of 1 mol / L is used to dissolve and recrystallize medical stone powder to make medical stone Nano particles. Others are the same as the first or second embodiment.

[0033] The specific operation of the dissolution and recrystallization treatment described in this embodiment is as follows: under the conditions of a temperature of 300°C and a pressure of 70.3 MPa, dissolve medical stone powder in a NaOH solution with a concentration of 1 mol / L until saturated, and bake After drying, nano-sized particles of medical stone are obtained.

[0034] The purity of the medical stone nano-particles described in this embodiment is 95% or more.

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Abstract

The invention relates to a preparation method of an air purifying filtering material, and more specifically discloses a preparation method of a filtering material used for welding fume. The preparation method is used for solving a problem of conventional welder anti-dust respirators that adsorption and dedusting performance is poor. The preparation method comprises following steps: 1, medical stone powder is prepared; 2, medical stone nano-grade particles are prepared; 3, surface modification is carried out so as to obtain surface modified particles; 4, heating blending is carried out so as to obtain a high polymeric compound; 5, carbonization is carried out so as to obtain a carbonization product; 6, melt spinning is carried out so as to obtain medical stone functional fiber; 7, catalytic activation modification is carried out so as to obtain catalytic activation modified medical stone fiber; and 8, spunlace moulding is carried out so as to obtain a medical stone functional filtering material which is the filtering material used for welding fume. The filtering material is taken as a dedusting filtering material.

Description

Technical field [0001] The invention relates to a method for preparing a filter material for air purification. Background technique [0002] The welding process is an indispensable and important process in my country's mechanical processing and manufacturing industry. However, its accompanying exhaust gas pollution, dust pollution, and toxic and harmful gas pollution are the three major "killers" faced by welders during operation. Although welding automation can alleviate the intensity of welding work to a certain extent, it still cannot fully realize unmanned operation. Simply relying on exhaust and smoke exhaust equipment cannot fully guarantee the health of welders. Therefore, the safety threats to welding workers have attracted much attention from companies and the media. [0003] At present, there are already welders' dust masks on the market, but they have the problem of poor dust absorption performance and high price. Summary of the invention [0004] The purpose of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01J20/26B01J20/30B01J27/18
Inventor 董明晔沈健雄李海超高会军
Owner HARBIN INST OF TECH
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