Mullite micro-nano pore heat insulation refractory material and preparation method thereof

A refractory material and micro-nano-pore technology, which is applied in the field of refractory materials, can solve the problems of low thermal conductivity and thermal insulation refractory materials, and achieve the effects of high green body strength, short demoulding and drying cycles, and simple process technology

Pending Publication Date: 2022-03-04
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is also to provide a method for preparing the above-mentioned mullite micro-nanoporous heat-insulating refractory material. The preparation method is green, pollution-free and easy to accurately control. High, and can solve the problem that the heat insulation refractory material obtained by the existing preparation method can not take into account the ultra-low thermal conductivity, high strength, high yield and the preparation process is green and pollution-free

Method used

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  • Mullite micro-nano pore heat insulation refractory material and preparation method thereof
  • Mullite micro-nano pore heat insulation refractory material and preparation method thereof
  • Mullite micro-nano pore heat insulation refractory material and preparation method thereof

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Embodiment 1

[0095] The mullite micro-nanoporous heat-insulating refractory material in this embodiment has mullite as the main crystal phase, and the shape of mullite is needle-shaped, with a length of 37-45 μm and an aspect ratio of 37-62. The mass percent of alumina in the chemical composition of the product is 25-28%. The product is made of base materials, additives and water, wherein the additives are composed of suspending agent, mineralizer, infrared shading agent, foaming agent, inorganic curing agent, organic curing agent and cell regulator.

[0096] The used base material is composed of the following components in mass percentage: 90% of aluminum-silicon raw material and 10% of silicon dioxide raw material. Among them, the aluminum-silicon raw materials are composed of perlite, potassium feldspar, kaolin (in its chemical composition, Al 2 o 3 The mass percentage is 36-38%, SiO 2 The mass percentage is 54-57%, and the particle size is 0.6-1mm) mixed according to the mass ratio ...

Embodiment 2

[0100] The mullite micro-nanoporous heat-insulating refractory material in this embodiment has mullite as the main crystal phase, and the shape of mullite is needle-shaped, with a length of 32-43 μm and an aspect ratio of 38-64. The mass percentage of alumina in the chemical composition of the product is 25-26%. The product is made of base materials, additives and water, wherein the additives are composed of dispersant, suspending agent, mineralizer, infrared sunscreen agent, foaming agent, inorganic curing agent, organic curing agent and cell regulator.

[0101] The used base material is composed of the following components in mass percentage: 25% of alumina material, 5% of aluminum silicon material, and 70% of silicon dioxide material. Among them, the alumina raw material is a mixture of industrial alumina and diaspore according to the mass ratio of 4:1; the aluminosilicate raw material is made of alkali stone (Al 2 o 3 The mass percentage is 45-48%, SiO 2 The mass percen...

Embodiment 3

[0104] The mullite micro-nanoporous heat-insulating refractory material in this embodiment has mullite as the main crystal phase, and the shape of mullite is needle-shaped, with a length of 41-53 μm and an aspect ratio of 39-72. The mass percent of alumina in the chemical composition of the product is 31-33%. The product is made of base materials, additives and water, wherein the additives are composed of dispersant, suspending agent, mineralizer, infrared sunscreen agent, foaming agent, inorganic curing agent, organic curing agent and cell regulator.

[0105] The used base material is composed of the following components in mass percentage: 10% of alumina material, 80% of aluminum silicon material, and 10% of silicon dioxide material. Among them, the alumina raw material is γ-Al 2 o 3 , the aluminum siliceous raw material is composed of fly ash, floating beads, kaolin (Al 2 o 3 The mass percentage content of 32 ~ 35%, SiO 2 The mass percentage content is 61-64%, and the ...

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Abstract

The invention belongs to the technical field of refractory materials, and particularly relates to a mullite micro-nano pore heat insulation refractory material and a preparation method thereof. The heat-insulating refractory material is mainly prepared from a base material, an additive and water, and the preparation process is green, environment-friendly, pollution-free, simple and easy to control. The main crystalline phase of the heat insulation refractory material is large-size needle-shaped and columnar mullite. The appearance of the product is white or faint yellow, the pore size distribution of pores is 0.006-200 [mu] m, the average pore size is 0.1-19 [mu] m, and the closed spherical micro-nano pore structure ensures that the product has better heat insulation performance under the conditions of lower volume density and high strength. By regulating and controlling the use amount of each raw material and the process, the finally prepared heat-insulating refractory material can meet the requirements of low heat conductivity and light weight, and also has better mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a mullite micro-nanoporous heat-insulating refractory material and a preparation method thereof, in particular to a mullite micro-nano-sized pore diameter, bird's nest-like pore structure, ultra-low thermal conductivity, high A mullite micro-nanoporous insulation refractory material with strong and green controllable preparation. Background technique [0002] High-temperature industry is the main energy-consuming industry in my country's industrial production. The low thermal energy utilization rate of various kilns is the main reason for their large energy consumption. If the average thermal efficiency can be increased by 20% according to the national requirements, energy can be saved equivalent to 220 million tons of standard coal, it can be seen that my country's high-temperature industrial energy-saving potential is huge. To improve the thermal effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/64C04B38/10
CPCC04B35/66C04B35/185C04B35/64C04B38/10C04B2235/3217C04B2235/3418C04B2235/349C04B2235/3427C04B2235/3481C04B2235/3463C04B2235/3472C04B2235/3218C04B2235/322C04B2235/48C04B2235/444C04B2235/443C04B2235/483C04B2235/96C04B2235/3284C04B2235/3272C04B2235/3239C04B2235/445C04B2235/3267C04B2235/3232C04B2235/3281C04B2235/448C04B2235/3206C04B2235/3213C04B2235/3215C04B2235/3258C04B2235/3224C04B2235/3241C04B2235/3227C04B2235/3229C04B2235/3225C04B2235/447C04B2235/442C04B2235/427C04B2235/3843C04B2235/3234C04B2235/3294C04B2235/3244C04B2235/3275C04B2235/3826C04B2235/3821C04B2235/3454C04B2235/3222C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/77C04B2235/9607C04B38/0067
Inventor 郭会师李文凤
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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