CN113800926A - Thermal insulation material and preparation method thereof - Google Patents

Thermal insulation material and preparation method thereof Download PDF

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Publication number
CN113800926A
CN113800926A CN202111128317.XA CN202111128317A CN113800926A CN 113800926 A CN113800926 A CN 113800926A CN 202111128317 A CN202111128317 A CN 202111128317A CN 113800926 A CN113800926 A CN 113800926A
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powder
aggregate
agent
weight
parts
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张利新
侯新梅
马成良
段桂芳
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Sinosteel Luonai Technology Co Ltd
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Sinosteel Luonai Technology Co Ltd
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Abstract

The invention discloses a heat insulation material and a preparation method thereof. Comprises the following components: 37-60 parts of aggregate, 20-25 parts of powder, 10-25 parts of bonding agent, 0.5-1 part of foaming agent, 0.2-0.25 part of dispersing agent and 0.1-0.2 part of water reducing agent; the aggregate is one of light ceramsite, light brick sand, waste electroceramics, high-alumina bauxite and mullite-cordierite composite materials; the powder material is one or a mixture of more of flint clay powder, bauxite powder, mullite powder and corundum powder; the binding agent is Portland cement or aluminate cement; the foaming agent is an anionic surfactant.

Description

Thermal insulation material and preparation method thereof
Technical Field
The invention belongs to the technical field of furnace heat insulation materials, and particularly relates to a heat insulation material and a preparation method thereof.
Background
With the gradual improvement of the awareness of environmental protection, the awareness of resource conservation and the awareness of energy utilization, how to reduce the high energy consumption of the industrial industry becomes the focus of attention of people. The heat insulating material plays an important role in saving energy and reducing consumption in the use process of industrial kilns and high-temperature furnaces.
At present, for industrial furnaces under various high-temperature working conditions, some light heat-insulating bricks are independently used as heat-insulating materials, some refractory fibers are independently used as heat-insulating materials, and more of the heat-insulating materials and the refractory fibers are matched for use.
For the light heat insulation brick, no matter the light heat insulation brick is prepared by introducing light aggregate or introducing fibers, vermiculite, perlite and the like, in the preparation process of the material, due to the non-uniformity of the particle size of the raw materials, especially by burning out the raw materials of pores, the non-uniformity of the internal pore distribution can cause the characteristics of non-uniform internal pore size distribution, overlarge pore size, high apparent porosity, high water absorption, low strength and the like of the heat insulation material, so that various working conditions can not be met in the use process, and the good effects of saving energy and reducing consumption are difficult to achieve.
The heat preservation layer materials used at present are used in a continuous and long-term use process of a kiln, and due to the problems of non-uniformity of an internal structure and the like, the problems of high energy consumption, poor heat insulation capacity, poor mechanical index, short service life and the like exist in the use of the heat preservation layer materials at high temperature, the heat preservation layer refractory materials are only limited to be used for a heat preservation layer and are difficult to serve as a working layer due to the poor mechanical index, in addition, the air holes of the heat preservation layer materials and the heat insulation materials used at present mainly comprise air holes, only a small number of air closing holes exist, and the heat conduction is difficult to isolate better.
Through search, the invention patent with the application number of CN201110411195.5 discloses a novel composite building energy-saving building block and a manufacturing method thereof. The concrete slurry comprises silicate cement, quick-hardening sulphoaluminate cement, vermiculite powder, spontaneous combustion coal gangue powder, alkali-resistant short-cut anti-cracking reinforcing fibers, a high-efficiency dispersant and a foaming agent, wherein the high-efficiency dispersant consists of sodium hexametaphosphate and sodium tripolyphosphate, and the foaming agent consists of sodium dodecyl sulfate, sodium dodecyl sulfate and triethanolamine. But firstly it gives a block for high-rise buildings which is resistant toThe pressure intensity is lower, at 2.5MPa, the heat conductivity coefficient is relatively higher, at 0.56W/(m)2K), difficult to adapt to the working conditions of industrial kilns.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention firstly provides a heat-insulating material and secondly provides a preparation method of the heat-insulating material.
An insulation material comprises the following components: 37-60 parts of aggregate, 20-25 parts of powder, 10-25 parts of bonding agent, 0.5-1 part of foaming agent, 0.2-0.25 part of dispersing agent and 0.1-0.2 part of water reducing agent.
The aggregate is one of light ceramsite, light brick sand, waste electroceramics, high-alumina bauxite and mullite-cordierite composite materials.
The powder material is one or a mixture of more of flint clay powder, bauxite powder, mullite powder and corundum powder.
The binding agent is Portland cement or aluminate cement.
The foaming agent is an anionic surfactant.
Further, the composition comprises the following components: 40-47 parts of aggregate, 21-23 parts of powder, 10.8-14.5 parts of bonding agent, 0.6-0.85 part of foaming agent, 0.2-0.25 part of dispersing agent and 0.1-0.2 part of water reducing agent.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of 5-3mm aggregate is that of 3-1mm aggregate, and the weight of less than 1mm aggregate is that of (12-15), (10-20) and (15-25); the particle size of the powder is 180-200 meshes.
Further, the light ceramsite is light shale ceramsite; the light brick sand is Al2O3The content is 45-72%, and the body density is 0.5-1.5g/cm3The waste brick sand; the high-alumina bauxite is Al2O360% -70% of Fe2O3High-alumina bauxite with the content of 2.5 to 3.0 percent.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A process for preparing the insulating material includes such steps as mixing powder, adhesive, foaming agent and disperser, adding aggregate, mixing, adding water (15-40 wt. portions), and mixing.
Further, the powder, the bonding agent, the foaming agent and the dispersing agent are mixed for 2 to 4 minutes, then the aggregate is added, mixed for 1 to 2 minutes, then 15 to 40 weight parts of water is added, and stirred for 5 to 10 minutes.
The heat insulating material disclosed by the invention can be used as a castable and can be sintered to prepare refractory bricks at a later stage.
Compared with the prior art, the invention has the following beneficial effects: compared with the characteristics of high apparent porosity and few closed pores of the traditional material, the heat-insulating material reduces the apparent porosity proportion, increases the closed porosity, and further reduces the heat conductivity of the heat-insulating material.
Detailed Description
The present invention will be further explained with reference to specific examples. The following examples are merely illustrative of the present invention, and are not intended to limit the present invention, and all the technical solutions obtained by simple replacement and superposition based on the present invention shall fall within the protection scope of the present invention.
Example 1
An insulation material comprises the following components: 60 parts by weight of aggregate, 25 parts by weight of powder, 25 parts by weight of bonding agent, 0.5 part by weight of foaming agent, 0.2 part by weight of dispersing agent and 0.1 part by weight of water reducing agent.
The aggregate is light ceramsite, and the light ceramsite is light shale ceramsite.
The powder is flint clay powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:10: 15; the grain diameter of the powder is 180 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 40 parts by weight of water and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent were kneaded for 4 minutes, then the aggregate was added, kneaded for 2 minutes, and then 40 parts by weight of water was added and stirred for 10 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then measured to have a total porosity of 55%, a closed porosity of 26%, a thermal conductivity (350 ℃) of 0.3W/(m.k), a flexural strength (1000 ℃ 3h) of 8MPa, a compressive strength (1000 ℃ 3h) of 62MPa, a service temperature of 900 ℃ and a bulk density of 1.9g/cm3。
Example 2
An insulation material comprises the following components: 55 parts of aggregate, 24 parts of powder, 20.2 parts of bonding agent, 0.5 part of foaming agent, 0.2 part of dispersing agent and 0.1 part of water reducing agent.
The aggregate is light brick sand, and the light brick sand is Al2O3The content is 45 percent and the body density is 0.5g/cm3The waste brick sand.
The powder is bauxite powder.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 15:20: 25; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 15 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 15 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then measured to have a total porosity of 55%, a closed porosity of 26%, a thermal conductivity (350 ℃) of 0.3W/(m.k), a flexural strength (1000 ℃ 3h) of 8MPa, a compressive strength (1000 ℃ 3h) of 62MPa, a service temperature of 900 ℃ and a bulk density of 1.9g/cm3。
Example 3
An insulation material comprises the following components: 53 parts by weight of aggregate, 23 parts by weight of powder, 12.1 parts by weight of bonding agent, 0.5 part by weight of foaming agent, 0.2 part by weight of dispersing agent and 0.1 part by weight of water reducing agent.
The aggregate is waste electroceramic.
The powder material is mullite powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 30 parts by weight of water and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent were kneaded for 3 minutes, then the aggregate was added, kneaded for 2 minutes, and then 30 parts by weight of water was added and stirred for 7 minutes.
The thermal insulation material prepared in this example was calcined at 1400 ℃ for 3 hours, and found to have a total porosity of 57%, a closed porosity of 33%, a thermal conductivity (350 ℃) of 0.29W/(m.times.k), a flexural strength (1000 ℃ times.3 h) of 7MPa, a compressive strength (1000 ℃ times.3 h) of 46MPa, a service temperature of 1250 ℃ and a bulk density of 1.7g/cm3。
Example 4
An insulation material comprises the following components: 50 parts by weight of aggregate, 23 parts by weight of powder, 16.1 parts by weight of bonding agent, 0.6 part by weight of foaming agent, 0.2 part by weight of dispersing agent and 0.1 part by weight of water reducing agent.
The aggregate is high-alumina bauxite which is Al2O360% of Fe2O3High bauxite with a content of 2.5%.
The powder is corundum powder.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 14:12: 23; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 4 minutes, then the aggregate is added, kneaded for 2 minutes, and then 20 parts by weight of water is added and stirred for 10 minutes.
The thermal insulation material prepared in this example was calcined at 1400 ℃ for 3 hours, and found to have a total porosity of 59%, a closed porosity of 28%, a thermal conductivity (350 ℃) of 0.29W/(m.times.k), a flexural strength (1000 ℃ times.3 h) of 6MPa, a compressive strength (1000 ℃ times.3 h) of 45MPa, a service temperature of 1250 ℃ and a bulk density of 1.8g/cm3。
Example 5
An insulation material comprises the following components: 45 parts of aggregate, 23 parts of powder, 12.9 parts of bonding agent, 0.6 part of foaming agent, 0.2 part of dispersing agent and 0.1 part of water reducing agent.
The aggregate is mullite-cordierite composite material.
The powder material is mullite powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:16: 17; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then measured to have a total porosity of 59%, a closed porosity of 32%, a thermal conductivity (350 ℃) of 0.29W/(m.times.k), a breaking strength (1000 ℃ times.3 h) of 12MPa, a compressive strength (1000 ℃ times.3 h) of 74MPa, a service temperature of 1400 ℃ and a bulk density of 1.5g/cm3。
Example 6
An insulation material comprises the following components: 40 parts of aggregate, 23 parts of powder, 11.1 parts of bonding agent, 0.6 part of foaming agent, 0.2 part of dispersing agent and 0.1 part of water reducing agent.
The aggregate is high-alumina bauxite which is Al2O370% of Fe2O3High alumina bauxite in the content of 3.0%.
The powder is bauxite powder.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:19: 16; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
This example systemAfter the obtained heat-insulating material was calcined at 1400 ℃ for 3 hours, the total porosity was 61%, the closed porosity was 33%, the thermal conductivity (350 ℃) was 0.23W/(m.k), the flexural strength (1000 ℃ X3 h) was 12MPa, the compressive strength (1000 ℃ X3 h) was 74MPa, the service temperature was 1200 ℃ and the bulk density was 1.6g/cm3。
Example 7
An insulation material comprises the following components: 47 parts by weight of aggregate, 22 parts by weight of powder, 14.5 parts by weight of bonding agent, 0.8 part by weight of foaming agent, 0.2 part by weight of dispersing agent and 0.1 part by weight of water reducing agent.
The aggregate is waste electroceramic.
The powder is flint clay powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in this example was calcined at 1400 ℃ for 3 hours, and then measured to have a total porosity of 61%, a closed porosity of 32%, a thermal conductivity (350 ℃) of 0.22W/(m.times.k), a flexural strength (1000 ℃ times.3 h) of 12MPa, a compressive strength (1000 ℃ times.3 h) of 76MPa, a service temperature of 1000 ℃ and a bulk density of 1.5g/cm3。
Example 8
An insulation material comprises the following components: 43 parts by weight of aggregate, 22 parts by weight of powder, 12.5 parts by weight of bonding agent, 0.7 part by weight of foaming agent, 0.2 part by weight of dispersing agent and 0.2 part by weight of water reducing agent.
The aggregate is light brick sand, and the light brick sand is Al2O3The content is 72 percent and the body density is 1.5g/cm3The waste brick sand.
The powder is bauxite powder.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 62%, the closed porosity was 34%, the thermal conductivity (350 ℃) was 0.22W/(m.times.k), the flexural strength (1000 ℃ X3 h) was 13MPa, the compressive strength (1000 ℃ X3 h) was 80MPa, the service temperature was 1100 ℃, and the bulk density was 1.5g/cm3。
Example 9
An insulation material comprises the following components: 46 parts by weight of aggregate, 22 parts by weight of powder, 10.8 parts by weight of bonding agent, 0.75 part by weight of foaming agent, 0.25 part by weight of dispersing agent and 0.2 part by weight of water reducing agent.
The aggregate is light ceramsite, and the light ceramsite is light shale ceramsite.
The powder material is mullite powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 62%, the closed porosity was 33%, the thermal conductivity (350 ℃) was 0.21W/(m.k), the flexural strength (1000 ℃ X3 h) was 13MPa, the compressive strength (1000 ℃ X3 h) was 80MPa, the service temperature was 1350 ℃ and the bulk density was 1.4g/cm3。
Example 10
An insulation material comprises the following components: 40 parts of aggregate, 22 parts of powder, 11.8 parts of bonding agent, 0.75 part of foaming agent, 0.25 part of dispersing agent and 0.2 part of water reducing agent.
The aggregate is light brick sand, and the light brick sand is Al2O3The content is 60%, and the body density is 1.0g/cm3The waste brick sand.
The powder is corundum powder.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 62%, the closed porosity was 31%, the thermal conductivity (350 ℃) was 0.2W/(m.k), the flexural strength (1000 ℃ 3h) was 12MPa, the compressive strength (1000 ℃ 3h) was 78MPa, the service temperature was 1500 ℃, and the bulk density was 1.4g/cm3。
Example 11
An insulation material comprises the following components: 42 parts by weight of aggregate, 21 parts by weight of powder, 12.2 parts by weight of bonding agent, 0.85 part by weight of foaming agent, 0.25 part by weight of dispersing agent and 0.2 part by weight of water reducing agent.
The aggregate is waste electroceramic.
The powder material is mullite powder.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 2 minutes, then the aggregate is added, kneaded for 1 minute, and then 20 parts by weight of water is added and stirred for 5 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then measured to have a total porosity of 63%, a closed porosity of 32%, a thermal conductivity (350 ℃) of 0.19W/(m.times.k), a breaking strength (1000 ℃ times.3 h) of 12MPa, a compressive strength (1000 ℃ times.3 h) of 70MPa, a service temperature of 1300 ℃ and a bulk density of 1.3g/cm3。
Example 12
An insulation material comprises the following components: 39 parts by weight of aggregate, 21 parts by weight of powder, 10.9 parts by weight of bonding agent, 0.85 part by weight of foaming agent, 0.25 part by weight of dispersing agent and 0.2 part by weight of water reducing agent.
The aggregate is high-alumina bauxite which is Al2O365% of Fe2O3High bauxite with a content of 2.8%.
The powder is a mixture of flint clay powder and bauxite powder in a weight ratio of 1: 1.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 4 minutes, then the aggregate is added, kneaded for 2 minutes, and then 20 parts by weight of water is added and stirred for 10 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 66%, the closed porosity was 33%, the thermal conductivity (350 ℃) was 0.16W/(m.k), the flexural strength (1000 ℃ 3h) was 7MPa, the compressive strength (1000 ℃ 3h) was 59MPa, the service temperature was 1200 ℃ and the bulk density was 1.2g/cm3。
Example 13
An insulation material comprises the following components: 37 parts of aggregate, 20 parts of powder, 10.1 parts of bonding agent, 0.85 part of foaming agent, 0.25 part of dispersing agent and 0.2 part of water reducing agent.
The aggregate is mullite-cordierite composite material.
The powder material is a mixture of flint clay powder and mullite powder according to a weight ratio of 1: 2.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 4 minutes, then the aggregate is added, kneaded for 2 minutes, and then 20 parts by weight of water is added and stirred for 10 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 67%, the closed porosity was 34%, the thermal conductivity (350 ℃) was 0.14W/(m.k), the flexural strength (1000 ℃ 3h) was 7MPa, the compressive strength (1000 ℃ 3h) was 45MPa, the service temperature was 1200 ℃ and the bulk density was 1.1g/cm3。
Example 14
An insulation material comprises the following components: 38 parts by weight of aggregate, 40 parts by weight of powder, 10.6 parts by weight of bonding agent, 0.95 part by weight of foaming agent, 0.25 part by weight of dispersing agent and 0.2 part by weight of water reducing agent.
The aggregate is high-alumina bauxite which is Al2O365% of Fe2O3High bauxite with a content of 2.7%.
The powder material is a mixture of flint clay powder, bauxite powder and corundum powder according to the weight ratio of 2:1: 1.
The bonding agent is aluminate cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 12:15: 20; the grain diameter of the powder is 200 meshes.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 4 minutes, then the aggregate is added, kneaded for 2 minutes, and then 20 parts by weight of water is added and stirred for 10 minutes.
The thermal insulation material prepared in the example was calcined at 1400 ℃ for 3 hours, and then the total porosity was 68%, the closed porosity was 33%, the thermal conductivity (350 ℃) was 0.12W/(m.k), the flexural strength (1000 ℃ 3h) was 6MPa, the compressive strength (1000 ℃ 3h) was 36MPa, the service temperature was 1100 ℃, and the bulk density was 1.0g/cm3。
Example 15
An insulation material comprises the following components: 37 parts of aggregate, 20 parts of powder, 10 parts of bonding agent, 1 part of foaming agent, 0.25 part of dispersing agent and 0.2 part of water reducing agent.
The aggregate is waste electroceramic.
The powder material is a mixture of flint clay powder, bauxite powder, mullite powder and corundum powder according to the weight ratio of 1:1:1: 1.
The binding agent is Portland cement.
The foaming agent is an anionic surfactant.
Further, the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of the 5-3mm aggregate is 3-1mm, and the weight of the less than 1mm aggregate is 13:15: 20; the grain diameter of the powder is 200 meshes.
Further, the light ceramsite is light shale ceramsite; the light brick sand is Al2O3The content is 63 percent, and the body density is 1.2g/cm3The waste brick sand; the high-alumina bauxite is Al2O362% of Fe2O3High bauxite with a content of 2.6%.
Further, the foaming agent is sodium dodecyl sulfate.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the melamine water reducing agent is sulfonated melamine formaldehyde resin (SMF).
A preparation method of a heat insulation material comprises the steps of firstly mixing powder, a bonding agent, a foaming agent and a dispersing agent, then adding aggregate, continuing mixing, then adding 20 parts by weight of water, and mixing uniformly.
Further, the powder material, the binder, the foaming agent and the dispersing agent are kneaded for 4 minutes, then the aggregate is added, kneaded for 2 minutes, and then 20 parts by weight of water is added and stirred for 10 minutes.
The thermal insulation material prepared in this example was calcined at 1400 ℃ for 3 hours, and found to have a total porosity of 70%, a closed porosity of 35%, a thermal conductivity (350 ℃) of 0.1W/(m.times.k), a flexural strength (1000 ℃ times.3 h) of 5MPa, a compressive strength (1000 ℃ times.3 h) of 30MPa, a service temperature of 1250 ℃ and a bulk density of 1.0g/cm3。
TABLE 1 parts by weight of the components of examples 1 to 5
Figure BDA0003279603060000151
TABLE 2 parts by weight of the components of examples 6 to 10
Figure BDA0003279603060000161
TABLE 3 parts by weight of the components of examples 11 to 15
Figure BDA0003279603060000171

Claims (9)

1. An insulation material, characterized in that: comprises the following components: 37-60 parts of aggregate, 20-25 parts of powder, 10-25 parts of bonding agent, 0.5-1 part of foaming agent, 0.2-0.25 part of dispersing agent and 0.1-0.2 part of water reducing agent;
the aggregate is one of light ceramsite, light brick sand, waste electroceramics, high-alumina bauxite and mullite-cordierite composite materials;
the powder material is one or a mixture of more of flint clay powder, bauxite powder, mullite powder and corundum powder;
the binding agent is Portland cement or aluminate cement;
the foaming agent is an anionic surfactant.
2. An insulating material according to claim 1, characterized in that: comprises the following components: 40-47 parts of aggregate, 21-23 parts of powder, 10.8-14.5 parts of bonding agent, 0.6-0.85 part of foaming agent, 0.2-0.25 part of dispersing agent and 0.1-0.2 part of water reducing agent.
3. An insulating material according to claim 1, characterized in that: the aggregate gradation is as follows: 5-3mm, 3-1mm and less than 1mm, wherein the weight of 5-3mm aggregate is the weight of 3-1mm aggregate, the weight of less than 1mm aggregate is the weight of = (12-15): (10-20): 15-25); the particle size of the powder is 180-200 meshes.
4. An insulating material according to claim 1, characterized in that: the light ceramsite is light shale ceramsite; the light brick sand is Al2O3The content is 45-72%, and the body density is 0.5-1.5g/cm3The waste brick sand; the high-alumina bauxite is Al2O360% -70% of Fe2O3High-alumina bauxite with the content of 2.5 to 3.0 percent.
5. An insulating material according to claim 1, characterized in that: the foaming agent is sodium dodecyl sulfate.
6. An insulating material according to claim 1, characterized in that: the dispersant is sodium tripolyphosphate.
7. An insulating material according to claim 1, characterized in that: the melamine water reducing agent is sulfonated melamine formaldehyde resin.
8. A method of producing a thermal insulating material according to any one of claims 1 to 7, characterized in that: firstly, mixing the powder, the bonding agent, the foaming agent and the dispersing agent, then adding the aggregate, continuing mixing, then adding 15-40 parts by weight of water and mixing evenly.
9. The method for preparing a thermal insulation material according to claim 8, wherein: the powder, the bonding agent, the foaming agent and the dispersing agent are mixed and milled for 2 to 4 minutes, then the aggregate is added, mixed and milled for 1 to 2 minutes, and then 15 to 40 weight parts of water is added and stirred for 5 to 10 minutes.
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