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Heat-insulating refractory material and preparation method thereof

A technology for refractory materials and refractory raw materials, applied in the field of refractory materials, can solve the problems of high porosity and poor corrosion resistance, and achieve the effects of high porosity, improved thermal shock stability and low strength.

Inactive Publication Date: 2021-01-29
杭州鹿扬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, thermal insulation refractory materials have relatively high porosity and loose structure, so their corrosion resistance is poor. In the furnace and load-bearing parts that are in direct contact with the charge

Method used

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  • Heat-insulating refractory material and preparation method thereof
  • Heat-insulating refractory material and preparation method thereof
  • Heat-insulating refractory material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of heat insulation refractory material, its preparation method comprises:

[0045] S1: 55 parts by weight of mullite and 13 parts by weight of yttrium aluminum garnet fiber are placed in a ball mill tank for wet mixing, water is used as the mixing medium, and zirconium balls are used as the ball milling medium; the mass ratio of raw materials, water and zirconium balls 1:1:1, ball milled for 2 hours; the ball-milled raw materials were dried in an oven at 75°C to obtain mixed dry materials;

[0046] S2: Put 45 parts by weight of mixed dry material with 4 parts by weight of aluminum chloride hexahydrate, 1 part by weight of 4-hydroxy-3-methoxybenzyl alcohol, and 15 parts by weight of modified starch in a wet mill, and mix the materials , the mixing time is 25min to obtain a billet;

[0047] S3: Form the above blank into a cylindrical sample of φ35mm×35mm under a molding pressure of 8MPa, and heat the sample at 120°C for 22h for drying treatment to obtain a green b...

Embodiment 2

[0050] A kind of heat insulation refractory material, its preparation method comprises:

[0051] S1: 60 parts by weight of mullite and 15 parts by weight of yttrium aluminum garnet fiber are placed in a ball mill tank for wet mixing, water is used as the mixing medium, and zirconium balls are used as the ball milling medium; the mass ratio of raw materials, water and zirconium balls 1:1:1, ball milled for 4 hours; the ball-milled raw materials were dried in an oven at 75°C to obtain mixed dry materials;

[0052] S2: 50 parts by weight of mixed dry material, 5 parts by weight of aluminum chloride hexahydrate, 3 parts by weight of 4-hydroxy-3-methoxybenzyl alcohol, and 10-15 parts by weight of modified starch are placed in a wet mill, and the The materials were mixed, and the mixing time was 28min to obtain a billet;

[0053] S3: Form the above-mentioned blank into a cylindrical sample of φ35mm×35mm under a molding pressure of 6-10MPa, and heat the sample at 125°C for 20h for d...

Embodiment 3

[0056] A kind of heat insulation refractory material, its preparation method comprises:

[0057] S1: 70 parts by weight of mullite and 10 parts by weight of yttrium aluminum garnet fiber are placed in a ball mill tank for wet mixing, water is used as the mixing medium, and zirconium balls are used as the ball milling medium; the mass ratio of raw materials, water and zirconium balls 1:1:1, ball milled for 3.5 hours; the ball-milled raw materials were dried in an oven at 72°C to obtain mixed dry materials;

[0058] S2: Put 56 parts by weight of mixed dry material with 2 parts by weight of aluminum chloride hexahydrate, 2 parts by weight of 4-hydroxy-3-methoxybenzyl alcohol, and 14 parts by weight of modified starch in a wet mill, and mix the materials , the mixing time is 30min to obtain a billet;

[0059] S3: Form the above-mentioned blank into a cylindrical sample of φ35mm×35mm under a molding pressure of 9MPa, and heat the sample at 135°C for 21h for drying treatment to obt...

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Abstract

The invention discloses a heat-insulating refractory material and a preparation method thereof. Mullite and yttrium aluminum garnet fibers are used as refractory raw materials, and aluminum chloride hexahydrate, 4-hydroxy-3-methoxy benzyl alcohol and modified starch are used as binding agents; the modified starch is prepared through ultrasonic treatment; the vacuum porosity of the heat-insulatingrefractory material is not lower than 81%, the compressive strength is higher than 12.2 MPa, and the heat conductivity coefficient is less than 0.26 W.m <-1>.K<-1>. The preparation method comprises the steps of mixing the inorganic minerals with the ceramic fibers, ball-milling and drying to obtain a mixed dry material; mixing the dry material with a binding agent to obtain a blank; pressing and molding the blank, and drying the blank in a drying oven to obtain a green body; and putting the green body into a high-temperature furnace for heat treatment, and cooling to obtain the heat-insulatingrefractory material. The heat-insulating refractory material has excellent thermal shock stability and compressive strength, high porosity, low volume density and low heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a heat-insulating refractory material and a preparation method thereof. Background technique [0002] Heat-insulating refractory materials refer to materials with high porosity, low bulk density, heat-insulating properties, and can shield heat. Because of the light weight of heat insulating refractory materials, they are usually called lightweight refractory materials. Insulation refractory materials, in addition to being mainly used to prevent the loss of heat outflow under the condition of higher than ambient temperature, can also be used to prevent the inflow of heat under the condition of lower than ambient temperature. When used in the former case, it is often called thermal insulation material. Due to the higher and higher requirements for energy-saving work, the development of heat-insulating refractory materials is very rapid, and there are many varieties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/80
CPCC04B35/66C04B2235/6562C04B2235/6567C04B2235/9607
Inventor 不公告发明人
Owner 杭州鹿扬科技有限公司
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