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Method for preparing high-temperature resistant anti-corrosion ablation microfiber

An anti-corrosion and ablative technology, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve problems such as high price, low cost performance, poor separation effect, etc., to improve product quality, environmental protection, and technical level High, excellent effect

Inactive Publication Date: 2017-05-17
宿迁市广昊纺织材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Internationally, research on high-silica cotton is dominated by the United States. The main research is cotton-like materials with a single fiber diameter of about 3 microns. The silica content is stable and the temperature resistance is good, but the micropores in the fiber are almost all Closed, only rely on the gap between fibers to filter, and the separation effect of materials at different molecular levels is poor
[0005] Domestic Hubei Jingzhou Feilihua Quartz Material Co., Ltd. has developed and produced quartz wool, which has excellent temperature resistance, corrosion resistance, compact microstructure, and no pores inside. Expensive, not cost-effective

Method used

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  • Method for preparing high-temperature resistant anti-corrosion ablation microfiber
  • Method for preparing high-temperature resistant anti-corrosion ablation microfiber

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Embodiment

[0030] 1. The composition selection of glass microfiber raw cotton

[0031] The microfiber provided by the present invention must contain a microporous structure in order to reflect its filtering function. The choice of raw cotton should first consider the material that can obtain microporous structure after acid leaching (hot acid leaching and water washing leaching). There are many types of glass fiber cotton suitable for acid leaching to obtain microporous structure. Commonly used Glass wool includes alkali-free glass wool, sodium borosilicate glass wool, sodium silicate and the like. After acid leaching of glass wool with different components, the size of micropores formed in the glass structure is quite different, and the content of silicon dioxide in different glass wools after acid treatment is different, resulting in differences in temperature resistance. The composition of the microfiber raw cotton is selected to obtain the filter material that can meet the requireme...

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Abstract

The invention discloses a method for preparing high-temperature resistant anti-corrosion ablation microfiber, and belongs to the technical field of high-temperature filtration and ablation material preparation. The method comprises the following steps: 1, performing thermal acid leaching, namely, artificially crushing alkali-free glass fiber cotton of which the single fiber diameter is less than 1 [mu] m, soaking into a 2.5 mol / L acid solution, and stirring in two directions at a speed of 30-300 rpm; 2, performing water washing percolation, namely, firstly, washing a great amount of an acid liquid, adsorbed in the fiber cotton, with cold water, further washing with hot water and cold water respectively, testing acid residues on the surface of the fiber cotton by using extensive pH indicator paper of which the pH value is 1-14, and till the pH value is greater than 5, stopping washing; and 3, performing thermal treatment, drying the fiber cotton washed with water, and determining whether sintering is implemented or not according to application situations. The high-temperature resistant anti-corrosion ablation microfiber is high in high temperature resistance, high in corrosion resistance, rich in porous texture, excellent in separation and filtration effect, high in technical level, high in ablation property, low in cost and relatively good in prospect in market application.

Description

technical field [0001] The invention relates to the technical field of high-temperature filtration and preparation of ablation materials, in particular to a preparation method of high-temperature-resistant and corrosion-resistant ablative microfibers. Background technique [0002] The temperature resistance of ordinary inorganic fiber filter materials is relatively low. The working environment of the filter cloth for dust removal made of medium-alkali-free glass fiber is below 200 °C, the acid and alkali erosion resistance is poor, and the service life is extremely long in the corrosive gas environment. It is short, and only plays the role of dust filtration, and does not work for the separation of gases of different molecular sizes. In the high-temperature field, the effective filtration and separation of gases requires the emergence of high-temperature-resistant filter materials. Traditional high-temperature filter materials use ceramic membranes or honeycomb ceramics, wh...

Claims

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Application Information

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IPC IPC(8): B01D39/20C03C25/68C03C25/70C03C25/00
CPCB01D39/2017B01D39/202B01D2239/0208B01D2239/1291C03C25/002C03C25/68C03C25/70
Inventor 李斌李伟张玲李军丁群张广立
Owner 宿迁市广昊纺织材料有限公司
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