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Biodegradable refractory ceramic fibre and preparation thereof

A refractory ceramic fiber and degradable technology, applied in the field of biodegradable refractory ceramic fiber and its preparation, can solve the problems of low fiber mechanical strength, low service temperature, high cost and high cost, and achieve high fiber mechanical strength and mechanical strength. Improved, low-cost effects

Inactive Publication Date: 2008-11-05
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current biodegradable refractory ceramic fibers still have certain defects, such as high cost and price compared with traditional ceramic fibers, low service temperature, low mechanical strength of fibers, and increased brittleness after high temperature use, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A biodegradable refractory ceramic fiber and a preparation method thereof. 20-25wt% talcum powder, 20-32wt% wollastonite, 35-50wt% quartz sand, 1-2.1wt% industrial grade calcium chloride, 1-2wt% fluorite, 0.2-1wt% La 2 o 3 , 0.5-1wt% CeO 2 Finely grind with 0.9-2wt% zircon sand, add 0.5-1.5wt% carboxymethyl cellulose as a binder; then press the above-mentioned mixture into blanks, dry and crush, and then place the crushed material in a resistance furnace The temperature is raised to 1700~1900℃, and after melting, it is blown into fibers under the condition of 0.3~0.5MPa.

[0013] In this embodiment: fine grinding means that particles with a particle size of <0.088mm after grinding account for more than 90%; drying means keeping the temperature at 110-120°C for 12-24 hours; crushing means that the particle size after crushing is <3mm.

[0014] The long-term use temperature of the biodegradable refractory ceramic fiber prepared in Example 1 is greater than 1300°C, and...

Embodiment 2

[0016] A biodegradable refractory ceramic fiber and a preparation method thereof. 20-25wt% talcum powder, 35-40wt% wollastonite, 30-35wt% quartz sand, 0.5-1wt% industrial grade calcium chloride, 1-2wt% fluorite, 0.2-1.5wt% Nd 2 o 3 Finely grind with 2-3wt% zircon sand, add 1.5-3wt% carboxymethyl cellulose as a binder; then press the above-mentioned mixture into blanks, dry and crush, and then place the crushed material in a resistance furnace Raise the temperature to 1500-1700°C, and blow into fibers under the condition of 0.5-0.7MPa after melting. Others are with embodiment 1.

[0017] The long-term use temperature of the biodegradable refractory ceramic fiber prepared in Example 2 is greater than 1200°C, and the dissolution constant in simulated human lung fluid is greater than 170ng / cm 2 h.

Embodiment 3

[0019] A biodegradable refractory ceramic fiber and a preparation method thereof. 28-31wt% dolomite, 15-20wt% wollastonite, 45-50wt% quartz sand, 2-3wt% industrial grade calcium chloride, 0.5-1wt% fluorite, 0.2-0.7wt% La 2 o 3 , 0.2~0.7wt% of Y 2 o 3 , 0.2~0.6wt% CeO 2 Finely grind with 2-3wt% zircon sand, add 0.5-1.5wt% calcium lignosulfonate as a binder; then press the above-mentioned mixture into blanks, dry and crush, and then place the crushed material in an electric arc furnace The temperature is raised to 1550-1750°C, and the filaments are spun directly after melting. Others are with embodiment 1.

[0020] The long-term use temperature of the biodegradable refractory ceramic fiber prepared in Example 3 is greater than 1300°C, and the dissolution constant in simulated human lung fluid is greater than 165ng / cm 2 h.

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Abstract

The invention relates to a biodegradable refractory ceramics fiber and a production method thereof. The technical proposal thereof comprises the following steps of: carrying out fine grinding treatment for the following materials according to the following mass ratio: 18-25 wt% of talcum powder or 28-33 wt% of dolomite, 15-40 wt% of wollastonite, 30-50 wt% of quartz sand, 0.5-3 wt % of industrial grade calcium chloride, 0.5-3 wt% of fluorite, 0.2-2 wt% of rare earth metal oxide and 0-3 wt% of zircon sand zircon sand; then adding 0.5-3 wt% of carboxymethyl cellulose or calcium lignosulphonate as a bonding agent; compressing the mixture into blank, then drying and crashing the mixture; heating the crashed mixture in a resistance furnace or an arc furnace at the temperature of 1500-1900 DEG C, then throwing fiber directly or forming fiber under the pressure of 0.3-0.7 Mpa by blowing after the mixture is smelted. The invention adopts natural minerals as raw materials and has low cost and simple technique, and the biodegradable refractory ceramics fiber produced by the invention has high mechanical strength, smooth surface, uniform chemical composition and can be used at the temperature of 1000-1200 DEG C or higher temperature for a long period and the harmfulness on the human body is reduced considerably.

Description

technical field [0001] The invention relates to a biodegradable refractory ceramic fiber and a preparation method thereof. It specifically relates to a biodegradable refractory ceramic fiber prepared by using natural mineral raw materials and a preparation method thereof. Background technique [0002] At present, the traditional refractory ceramic fibers mainly used are mostly aluminum silicate ceramic fibers, which contain relatively high Al 2 o 3 and lower SiO 2 , is alkaline. A large amount of dust generated during the production and use of traditional refractory ceramic fibers is inhaled into the lungs of the human body, and cannot be fully degraded in the lung fluid and deposited in the lungs, which is harmful to human health. According to EU regulations, traditional refractory ceramic fibers are likely carcinogens and fail to meet environmental protection requirements. [0003] In the technical materials that have been put into the market or published at present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/04C04B35/622C04B35/66
Inventor 王玺堂刘浩张保国王周福
Owner WUHAN UNIV OF SCI & TECH
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