Method for preparing SiC whisker toughened Al2O3 abrasion-resistant refractory material and material prepared through method

A refractory material and whisker technology is applied in the field of preparing SiC whisker toughened Al2O3 wear-resistant refractory materials, which can solve the problems of high temperature required for sintering, large amount of external carbon source, large fuel consumption, etc. The effect of lower temperature, lower cost and lower energy consumption

Inactive Publication Date: 2014-05-28
CHINA SHENHUA ENERGY CO LTD +1
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires a large amount of additional carbon source and high cost; and the temperature required for sintering is high, reaching above 1600 ° C, and the fuel consumption is large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The weight ratio of the components is 75 parts of white mud, 15 parts of coke powder, and 2 parts of polyvinyl alcohol, wherein SiO in white mud 2 75.32% by weight, A1 2 o 3 The weight percentage is 15.12%; the weight percentage of C in coke powder is 99.0%. Take the above materials and put them into a mixer, dry mill for 10 hours, the particle size of lime mud and coke powder are both less than 0.088mm, and the sieve residue of 200 mesh sieve is less than 2.0wt.%. The uniformly mixed material is placed in a mixer and mixed with an appropriate amount of water, shaped in a molding machine, dried naturally at room temperature for 10 hours, and then dried in a drying kiln at 100°C for 12 hours to make the moisture content ≤ 3.0% to obtain a green body; the obtained The green body is put into a muffle furnace and fired at a firing temperature of 1400°C, kept at 1400°C for 90 minutes, and cooled to obtain the product.

Embodiment 2

[0029] The weight ratio of the components is 70 parts of white mud, 30 parts of coke powder, and 3 parts of polyvinyl alcohol, wherein SiO in white mud 2 70.38% by weight, A1 2 o 3 The weight percentage is 20.56%; the weight percentage of C in coke powder is 99.0%; the particle size of white mud and coke powder are both less than 0.088mm. Take the above-mentioned materials and put them into a mixer, dry mill for 12 hours, so that the particle size is less than 0.074mm, and the sieve residue of 200 mesh aperture is less than 2.0wt.%. The uniformly mixed material is placed in a mixer and mixed with an appropriate amount of water, shaped in a molding machine, dried naturally at room temperature for 12 hours, and then dried in a drying kiln at 100°C for 12 hours to make the moisture content ≤ 3.0% to obtain a green body; the obtained The green body is put into a muffle furnace and fired at a firing temperature of 1500°C, kept at 1500°C for 2 hours, and cooled to obtain the produ...

Embodiment 3

[0031] The weight ratio of the components is 65 parts of white mud, 35 parts of coke powder, and 3 parts of polyvinyl alcohol, wherein SiO in white mud 2 68.86% by weight, A1 2 o 3 The weight percentage is 23.25%; the weight percentage of C in coke powder is 99.0%; the particle size of white mud and coke powder are both less than 0.088mm. Take the above-mentioned materials and put them into a mixer, dry mill for 12 hours, so that the particle size is less than 0.074mm, and the sieve residue of 200 mesh aperture is less than 2.0wt.%. The uniformly mixed material is placed in a mixer and mixed with an appropriate amount of water, shaped in a molding machine, dried naturally at room temperature for 12 hours, and then dried in a drying kiln at 100°C for 12 hours to make the moisture content ≤ 3.0% to obtain a green body; the obtained The green body is put into a muffle furnace and fired at a firing temperature of 1450°C, kept at 1450°C for 3 hours, and cooled to obtain the produ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing a SiC whisker toughened Al2O3 abrasion-resistant refractory material by using white mud as the raw material. The method comprises the following steps: taking the following components in parts by weight: 30 to 90 parts of white mud, 10 to 50 parts of carbon source and 1 to 15 parts of a bonding agent; uniformly mixing the above components; carrying out dry grinding; adding the obtained product into a forming machine for forming; drying to obtain a green body; placing the green body in a thermotechnical kiln for calcination at the calcination temperature of 1,200 to 1,500 DEG C; carrying out heat preservation for 30 minutes to 10 hours; cooling , so that the SiC whisker toughened Al2O3 abrasion-resistant refractory material is obtained. The invention further discloses the SiC whisker toughened Al2O3 abrasion-resistant refractory material prepared through the method disclosed by the invention and the lining of a circulating fluidized bed boiler made of the SiC whisker toughened Al2O3 abrasion-resistant refractory material. The preparation method disclosed by the invention is low in cost and has low energy consumption; the prepared abrasion-resistant refractory material is good in abrasion resistance.

Description

technical field [0001] The invention belongs to the field of wear-resistant refractory materials, in particular to a method for preparing SiC whisker toughened Al 2 o 3 A method for a wear-resistant refractory material, and a wear-resistant refractory material prepared by the method. Background technique [0002] Circulating fluidized bed boiler is an efficient and clean combustion equipment, which has been widely used in power generation, waste incineration and other industries. During the circulating combustion process of the circulating fluidized bed boiler, the soot particles are in a high-speed circulating flow in the furnace-cyclone separator-return valve-furnace, which will cause strong erosion and wear to the lining material of the circulating fluidized bed boiler, and the inner The wear and failure of the lining material will lead to frequent shutdowns and heat energy consumption, which seriously restricts the long-term and efficient operation of the furnace and i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66F23C10/18
Inventor 王永旺房现阁李超王强杜艳霞韩建国池君洲霍文
Owner CHINA SHENHUA ENERGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap