A kind of unshaped refractory material and preparation method thereof

A refractory material and powder technology, which is applied in the field of unshaped refractory materials and their preparation, can solve the problems of thermal shock resistance, alkaline atmosphere erosion resistance and poor slagging ability, etc., and achieves excellent erosion resistance and high fire resistance. Degree, anti-slagging effect, outstanding effect

Active Publication Date: 2019-07-23
山东嘉和耐火材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of mullite and other high-alumina minerals as refractory materials with poor thermal shock resistance, alkaline atmosphere erosion resistance and anti-slagging ability, the purpose of the present invention is to provide a kind of forsterite magnesium-rich mineral as raw material, Unshaped refractory material with good thermal shock resistance, excellent corrosion resistance and outstanding anti-slagging effect

Method used

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Examples

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preparation example Construction

[0020] The preparation process of the binder used in the present invention is as follows: take clay and silicon micropowder respectively according to the corresponding mass ratio, put them into ethylene glycol twice the total mass of clay and silicon micropowder, and stir for 15 minutes at 70°C to make the clay and silicon micropowder The fine powder is uniformly dispersed in ethylene glycol.

[0021] The composition and corresponding mass ratio of the plasticizer used in the present invention are: based on the mass of the plasticizer as 100%, 50%-70% of bentonite, and 30-50% of hydroxypropyl methylcellulose.

[0022] The preparation process of the plasticizer used in the present invention is as follows: bentonite is ground to the sieve that can be sieved through more than 200 meshes, the bentonite after grinding is taken according to the corresponding mass ratio, ethylene glycol with 3 times the quality of bentonite is added, and the Stir for 15 minutes, then take the corresp...

Embodiment 1

[0024] An unshaped refractory material, its composition and corresponding mass percentage are: forsterite aggregate 40%, yttrium oxide powder additive 30%, zirconia powder additive 20%, binder 7%, plasticizer 3% .

[0025] The preparation method of the amorphous refractory material: the forsterite is subjected to clean water removal of impurities and magnetic separation to remove iron, and then dried at 80°C, and the dried forsterite is ground until it can be sieved through a sieve of more than 80 mesh, according to the above quality Ratio Take the ground forsterite and other raw materials respectively, mix the ground forsterite with zirconia powder and yttrium oxide powder evenly, add the prepared binder to the mixture, mix at 50°C for 15 minutes, Continue to add the prepared plasticizer, mix for 15 minutes, then dry at 220°C for 10 hours, calcine at 1500°C for 2 hours, cool down to 1000°C and keep it for 2.5 hours, cool it down to 550°C and keep it for 2.5 hours, then cool i...

Embodiment 2

[0027] An unshaped refractory material, its composition and corresponding mass percentage are: forsterite aggregate 50%, yttrium oxide powder additive 25%, zirconia powder additive 15%, binder 9%, plasticizer 1% .

[0028]The preparation method of the amorphous refractory material: the forsterite is subjected to clean water removal of impurities and magnetic separation to remove iron, and then dried at 80°C, and the dried forsterite is ground until it can be sieved through a sieve of more than 80 mesh, according to the above quality Ratio Take the ground forsterite and other raw materials respectively, mix the ground forsterite with zirconia powder and yttrium oxide powder evenly, add the prepared binder to the mixture, mix at 50°C for 15 minutes, Continue to add the prepared plasticizer, mix for 15 minutes, then dry at 250°C for 11 hours, calcine at 1600°C for 2 hours, cool down to 1100°C for 4 hours, cool to 580°C for 4 hours, and cool to 250°C for heat preservation After 2...

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Abstract

The invention discloses an unshaped refractory and a preparation method thereof. The unshaped refractory is prepared from 40%-60% of forsterite, 20%-30% of yttria powder, 10%-20% of zirconia powder, 5%-9% of a binder and 1%-5% of a plasticizer, wherein in terms of 100% by mass of the forsterite, the forsterite comprises 20%-30% of forsterite with the particle size of 8-5 mm, 20%-30% of forsterite with the particle size of 8-5 mm, 50%-65% of forsterite with the particle size of 5-3 mm, 10%-15% of forsterite with the particle size of 3-1 mm and lower than or equal to 5% of forsterite with the particle size smaller than 1 mm. The forsterite is calcined and decomposed at a high temperature, and magnesium oxide is obtained and has good resistance to basic slag and iron slag; body densification of the refractory can be realized by yttria, permeation of the slag into the refractory is prevented, and corrosion of the refractory by the slag is inhibited; zirconia has a small coefficient of thermal expansion, so that the thermal shock resistance of the refractory can be improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to an amorphous refractory material with excellent erosion resistance, good thermal shock resistance and outstanding slagging prevention effect and a preparation method thereof. Background technique [0002] Mullite is an aluminosilicate mineral formed at high temperature. As a high-quality refractory material, it has the advantages of high strength, high melting point, and low thermal conductivity. It is now widely used in various industries such as steel, nonferrous metals, and chemicals. In kilns, thermal equipment and structures in the field. However, when mullite is used as a refractory material, there are still the following deficiencies: 1) Mullite is a high-alumina mineral, and its main component is 3Al 2 o 3 2SiO2 2 , as a refractory material, it is easily corroded when used in equipment with an alkaline atmosphere such as a steelmaking furnace. 2) When mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
CPCC04B35/622C04B35/66
Inventor 胡宏平
Owner 山东嘉和耐火材料有限责任公司
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