CN115504797A - Wear-resistant alkali-cracking-resistant integral prefabricated block of blast furnace type garbage incinerator and preparation method thereof - Google Patents
Wear-resistant alkali-cracking-resistant integral prefabricated block of blast furnace type garbage incinerator and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a wear-resistant alkali-cracking-resistant integral precast block of a blast furnace type garbage incinerator, which consists of a castable body and a compact layer, wherein the castable body comprises the following components in parts by mass: 25-40 parts of calcium hexaluminate particles, 18-32 parts of silicon carbide particles, 4-11 parts of alumina hollow sphere particles, 8-12 parts of calcium hexaluminate fine powder, 4-8 parts of alpha-alumina micropowder, 3-8 parts of aluminum hydroxide micropowder, 5-12 parts of silicon carbide fine powder, 3-8 parts of calcium oxide micropowder, 0.05-0.1 part of explosion-proof fiber, 0.15-0.3 part of water reducing agent, 4-8 parts of pure calcium aluminate cement, and the compact layer comprises the following components in parts by weight: 10-20 parts of aluminum hydroxide micro powder, 30-60 parts of alpha-alumina micro powder, 5-15 parts of anorthite micro powder, 20-40 parts of silicon carbide fine powder and 1.5-3 parts of acrylic resin, and 1.5-4 parts of a composite additive. The prefabricated block prepared by the invention has the advantages of reduced weight, enhanced density and strength, improved wear resistance and permeability resistance, alkali cracking resistance and excellent alkali metal corrosion resistance.
Description
Technical Field
The invention relates to the technical field of building material precast blocks, in particular to a wear-resistant alkali-cracking-resistant integral precast block of a blast furnace type garbage incinerator and a preparation method thereof.
Background
The structure of the blast furnace type garbage incinerator is similar to that of a blast furnace, the working conditions and environments of the positions such as a furnace belly and a furnace waist are severe, the severe scouring of garbage in the incinerator and the erosion of complex components of the garbage, particularly harmful elements of alkali metals are borne, and the blast furnace type garbage incinerator is one of key positions for determining the service life of the garbage incinerator. The water-cooled cooling wall is generally arranged at the furnace belly and the furnace waist part, the refractory bricks are embedded in the dovetail grooves, the service life is prolonged by reducing the working temperature of refractory materials and forming a protective layer which resists slag with slag, the brick embedded at the furnace belly and the furnace waist part mainly refers to an iron-making blast furnace, phosphate-bonded high-alumina bricks, silicon nitride-bonded silicon carbide bricks and the like are selected according to the parts, the infiltration erosion and the enrichment of alkali metals can form low-melting expansion products such as nepheline, garnet and the like in the refractory materials, so that the alkali cracking and the damage of the refractory materials are caused, the performance of the silicon nitride-bonded silicon carbide bricks is relatively good, but the cost is relatively high and the operation process of pressurizing by nitrogen is complex in the production process. The integral casting of the cooling wall improves the integrity, but the higher porosity provides a channel for infiltration and corrosion of alkali metal, and the alkali cracking phenomenon is difficult to inhibit.
The Chinese patent CN201910775897.8 provides a SiC combined Si3N4 castable for completely replacing a blast furnace cooling wall inlaid brick and a preparation method thereof, silicon nitride phase of the castable related to the method is added manually instead of generated in situ, the density of the material is low, the porosity is high, and the wear resistance is emphasized, but the resistance to alkali metal penetration and corrosion is insufficient; the invention patent CN201010175364.5 provides a blast furnace cooling wall inlaid brick, which is prepared by high steel fiber content and slip casting, but the method is easy to cause the aggregation of steel fibers, and although the problems of strength and wear resistance are solved, the steel fibers are easy to be corroded and damaged by alkali metal, and the two methods can not solve the corrosion problem of the alkali metal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wear-resistant alkali-cracking-resistant integral precast block of a blast furnace type garbage incinerator and a preparation method thereof.
One of the purposes of the invention is to provide a wear-resistant alkali-cracking-resistant integral precast block of a blast furnace type garbage incinerator, which consists of a castable body and a compact layer,
the castable comprises the following main body components in percentage by weight:
25-40 parts of calcium hexaluminate particles
Silicon carbide particles 18-32 parts
4-11 parts of alumina hollow sphere particles
8-12 parts of calcium hexaluminate fine powder
4-8 parts of alpha-alumina micropowder
3-8 parts of aluminum hydroxide micropowder
5-12 parts of silicon carbide fine powder
3-8 parts of calcium oxide micro powder
0.05 to 0.1 portion of explosion-proof fiber
0.15 to 0.3 portion of water reducing agent
4-8 parts of pure calcium aluminate cement
The compact layer comprises the following components in percentage by weight:
10-20 parts of aluminum hydroxide micro powder
30-60 parts of alpha-alumina micro powder
5-15 parts of anorthite micropowder
20-40 parts of silicon carbide fine powder
1.5-3 parts of acrylic resin
1.5-4 parts of a composite additive.
Preferably, al in the calcium hexaluminate particles 2 O 3 The content is not less than 90wt%, wherein the content of calcium hexaluminate particles with the particle size of 3-5mm is 15-27wt%, the content of calcium hexaluminate particles with the particle size of less than 3mm is 35-50wt%, the content of calcium hexaluminate particles with the particle size of less than 1mm is 33-39wt%, the content of Al2O3 in the alumina hollow ball particles is not less than 95wt%, the particle size of the alumina hollow ball particles is 0-3mm, the content of SiC in the silicon carbide particles is not less than 99.5wt%, the content of silicon carbide particles with the particle size of 1-3mm is 55-75wt%, the content of silicon carbide particles with the particle size of less than 1mm is 25-45wt%, the average particle size of the calcium hexaluminate fine powder and the silicon carbide fine powder is 0.045mm, the main components of the alpha-alumina fine powder, the calcium hydroxide fine powder and the calcium oxide fine powder are all more than 99wt%, and the average particle size of the alpha-alumina fine powder, the calcium hydroxide fine powder and the calcium oxide fine powder is less than 2 μm.
Preferably, the water reducing agent is one or more of ADS and ADW.
Preferably, the composite additive is PVA, sodium carboxymethylcellulose and rho-Al 2 O 3 One or more of (a).
The second purpose of the invention is to provide a method for preparing a wear-resistant alkali-cracking-resistant integral precast block of a blast furnace type garbage incinerator, which is characterized by comprising the following steps,
1) Adding water accounting for 80-120wt% of the total amount of the raw materials of the compact layer into the proportioned raw materials of the compact layer, and performing ball milling to prepare slurry;
2) Preparing materials according to the components and the proportion of the castable body after the explosion-proof fibers are removed, adding water accounting for 5-8wt% of the raw materials of the castable body into the prepared materials, uniformly stirring, pouring or spraying the prepared materials on a dovetail groove and the upper part of a cooling wall, uniformly spreading the explosion-proof fibers in the corresponding proportion on the surface, naturally melting the explosion-proof fibers into the surface of the castable, and burning off the explosion-proof fibers after natural curing for 24 hours to obtain the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator;
3) Spraying or coating the slurry prepared in the step 1) on the surface of the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator, drying for 24 hours at the temperature of 110-130 ℃, and baking for 3 hours at the temperature of 600-800 ℃ to obtain the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator.
The invention has the following advantages: the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator is prepared by taking calcium hexaluminate, silicon carbide, alumina hollow spheres and aluminum hydroxide as main raw materials, so that on one hand, the integral weight is reduced, and the stress load of a cooling wall is reduced, meanwhile, the added aluminum hydroxide micro powder, calcium oxide micro powder and calcium hexaluminate components form two crystal phases of calcium hexaluminate which is manually added and generated in situ at high temperature, and are solid-dissolved with the alumina components, so that the density and the strength are greatly enhanced, and the wear resistance and the permeability resistance are improved; the compact layer material can well permeate into the pore diameter left by the explosion-proof fiber after burning and the pores on the surface of the body through water grinding, calcium hexaluminate crystals are generated in situ to form densification and microporosity, the channel for the alkali metal to invade is obviously blocked and firmly combined with the body, and the aim of alkali crack resistance is achieved; the anorthite component not only can provide a calcium source but also can provide a silicon source, is favorable for forming a slag layer in the subsequent production process, and has the effect of slag resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be clearly and completely made in conjunction with the technical solutions of the specific embodiments.
Example 1 a wear-resistant alkali-resistant monolithic precast block for a blast furnace type garbage incinerator was prepared according to the following method, including the steps of,
1) The casting material comprises the following raw materials in parts by weight:
25kg of calcium hexaluminate particles
Silicon carbide particles 32kg
Alumina hollow sphere particle 11kg
8kg of fine calcium hexaluminate powder
4kg of alpha-alumina micropowder
8kg of aluminum hydroxide micropowder
5kg of fine silicon carbide powder
3kg of calcium oxide micro powder
0.05-0.1kg of explosion-proof fiber
0.15-0.3kg of water reducing agent
4kg of pure calcium aluminate cement
The compact layer comprises the following raw materials in percentage by weight:
10kg of aluminum hydroxide micropowder
60kg of alpha-alumina micropowder
5kg of anorthite micro powder
20kg of silicon carbide fine powder
Acrylic resin 2kg
3kg of composite additive
Wherein Al in the calcium hexaluminate particles 2 O 3 The content is not less than 90wt%, wherein the content of calcium hexaluminate particles with the particle size of 3-5mm is 15wt%, the content of calcium hexaluminate particles with the particle size of less than 3mm and not more than 1mm is 50wt%, the content of calcium hexaluminate particles with the particle size of less than 1mm and not more than 0.1mm is 35wt%, and Al in the alumina hollow ball particles 2 O 3 The content is more than or equal to 95wt percent, the grain diameter of the alumina hollow sphere particles is 0-3mm, the SiC content in the silicon carbide particles is more than or equal to 99.5wt percent,55wt% of silicon carbide particles with the particle size of 1-3mm, 45wt% of silicon carbide particles with the particle size less than 1mm and less than 0.1mm, 0.045mm of average particle size of calcium hexaluminate fine powder and silicon carbide fine powder, 99wt% of main components of alpha-alumina micro powder, calcium hydroxide micro powder and calcium oxide micro powder, 2 μm of average particle size of the alpha-alumina micro powder, the calcium hydroxide micro powder and the calcium oxide micro powder, ADS (automatic Water reducing agent), and PVA (polyvinyl alcohol) and sodium carboxymethylcellulose as composite admixtures;
2) Adding water accounting for 120wt% of the raw materials of the dense layer, namely 120kg of water, into the proportioned raw materials of the dense layer, and performing ball milling to prepare slurry;
3) Preparing materials according to the components and the proportion of the castable body after the explosion-proof fibers are removed, adding water accounting for 6wt% of the raw materials of the castable body into the prepared materials, uniformly stirring, pouring or spraying the prepared materials on a dovetail groove and the upper part of a cooling wall, uniformly spreading the explosion-proof fibers in the corresponding proportion on the surface, naturally melting the explosion-proof fibers into the surface of the castable, and burning off the explosion-proof fibers after natural curing for 24 hours to obtain the blast furnace type garbage incinerator wear-resistant alkali-cracking-resistant integral precast block body;
4) Spraying or coating the slurry prepared in the step 1) on the surface of the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator, drying for 24 hours at the temperature of 110 ℃, and baking for 3 hours at the temperature of 700 ℃ to obtain the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator.
The compression strength of the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator prepared by the embodiment can reach 50-60MPa after 1300 ℃ for 3h, the apparent porosity of a surface dense layer can be as low as 4-6%, the porosity is far lower than that of the current cooling wall inlaid brick by about 20%, and the integral volume weight is reduced to 1.8-2.1g/cm 3 On the basis of the wear resistance of the brick reaches less than 5.5cm of the brick inlaid on the current cooling wall 3 And performing an alkali erosion resistance test at 1100 ℃ for 3h, wherein the alkali metal elements are blocked outside the compact layer, the penetration depth is less than 1mm and far lower than that of the current cooling wall inlaid brick by 4-6mm, and no obvious penetration or erosion exists.
Example 2 a wear-resistant alkali-resistant monolithic precast block for a blast furnace type garbage incinerator was prepared as follows, including the following steps,
1) The casting material comprises the following raw materials in parts by weight:
40kg of calcium hexaluminate pellets
18kg of silicon carbide particles
Alumina hollow sphere particle 4kg
12kg of calcium hexaluminate fine powder
8kg of alpha-alumina micropowder
3kg of aluminum hydroxide micropowder
6kg of fine silicon carbide powder
3kg of calcium oxide micro powder
0.05-0.1kg of explosion-proof fiber
0.15-0.3kg of water reducing agent
6kg of pure calcium aluminate cement
The compact layer comprises the following raw materials in percentage by weight:
20kg of aluminum hydroxide micro powder
30kg of alpha-alumina micropowder
15kg of anorthite micro powder
30kg of fine silicon carbide powder
Acrylic resin 3kg
2kg of composite additive
Wherein Al in the calcium hexaluminate particles 2 O 3 The content is not less than 90wt%, wherein the content of calcium hexaluminate particles with the particle size of 3-5mm is 27wt%, the content of calcium hexaluminate particles with the particle size of less than 3mm and not more than 1mm is 35wt%, the content of calcium hexaluminate particles with the particle size of less than 1mm and not more than 0.1mm is 38wt%, and Al in the alumina hollow ball particles 2 O 3 The content is more than or equal to 95wt%, the grain diameter of the hollow alumina ball particles is 0-3mm, the SiC content in the silicon carbide particles is more than or equal to 99.5wt%, the grain diameter of the silicon carbide particles is 1-3mm and is 75wt%, the grain diameter of the silicon carbide particles is less than or equal to 25wt% when the grain diameter of the silicon carbide particles is 0.1mm, the average grain diameter of the calcium hexaluminate fine powder and the silicon carbide fine powder is 0.045mm, the main component contents of the alpha-alumina micro powder, the calcium hydroxide micro powder and the calcium oxide micro powder are more than 99wt%, the average grain diameter of the alpha-alumina micro powder, the calcium hydroxide micro powder and the calcium oxide micro powder is less than 2 mu m, the water reducing agent is ADW, the composite admixture is sodium carboxymethylcellulose and rho-Al 2 O 3 ；
2) Adding water which accounts for 80wt% of the raw materials of the compact layer, namely 80kg of water, into the proportioned raw materials of the compact layer, and carrying out ball milling to prepare slurry;
3) Preparing materials according to the components and proportion of the castable body after the anti-explosion fibers are removed, adding water accounting for 8wt% of the raw materials of the castable body into the prepared materials, uniformly stirring, pouring or spraying the prepared materials to a dovetail groove and the upper part of a cooling wall, uniformly spreading the anti-explosion fibers in the corresponding proportion on the surface and naturally blending the anti-explosion fibers into the surface of the castable, and burning off the anti-explosion fibers after natural curing for 24 hours to obtain the blast furnace type garbage incinerator wear-resistant alkali-cracking-resistant integral precast block body;
4) Spraying or painting the slurry prepared in the step 1) on the surface of the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator, drying for 24 hours at the temperature of 120 ℃, and baking for 3 hours at the temperature of 800 ℃ to obtain the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator.
The compression strength of the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator prepared by the embodiment can reach 60-70MPa after 1300 ℃ for 3h, the apparent porosity of a surface dense layer can be as low as 5-7%, the porosity is far lower than that of the current cooling wall inlaid brick by about 20%, and the integral volume weight is reduced to 2.0-2.2g/cm 3 On the basis, the wear resistance exceeds that of the prior cooling wall inlaid brick to be less than 4.0cm 3 And performing an alkali corrosion resistance test at 1100 ℃ for 3h, wherein the alkali metal elements are blocked outside the compact layer, the penetration depth is less than 1.2mm and far less than the penetration depth of the current cooling wall inlaid brick by 4-6mm, and no obvious penetration and corrosion exist.
Example 3 a wear-resistant alkali-resistant monolithic precast block for a blast furnace type garbage incinerator was prepared according to the following method, including the steps of,
1) The castable is prepared from the following raw materials in percentage by weight:
26kg of calcium hexaluminate particles
Silicon carbide particles 22kg
6kg of alumina hollow sphere particles
8kg of fine calcium hexaluminate powder
5kg of alpha-alumina micropowder
5kg of aluminum hydroxide micropowder
12kg of fine silicon carbide powder
8kg of calcium oxide micro powder
0.05-0.1kg of explosion-proof fiber
0.15-0.3kg of water reducing agent
8kg of pure calcium aluminate cement
The compact layer comprises the following raw materials in percentage by weight:
15kg of aluminum hydroxide micropowder
32kg of alpha-alumina micropowder
10kg of anorthite micro powder
40kg of fine silicon carbide powder
Acrylic resin 1.5kg
Composite additive 1.5kg
Wherein Al in the calcium hexaluminate particles 2 O 3 The content is not less than 90wt%, wherein the content of calcium hexaluminate particles with the particle size of 3-5mm is 19wt%, the content of calcium hexaluminate particles with the particle size of less than 3mm and 1mm is 42wt%, the content of calcium hexaluminate particles with the particle size of less than 1mm and 0.1mm is 39wt%, and Al in the alumina hollow ball particles 2 O 3 The content is more than or equal to 95wt%, the grain diameter of the alumina hollow ball particles is 0-3mm, the SiC content in the silicon carbide particles is more than or equal to 99.5wt%, the grain diameter of the silicon carbide particles is 1-3mm and 65wt%, the grain diameter of the silicon carbide particles is less than or equal to 0.1mm and 35wt%, the average grain diameter of the calcium hexaluminate fine powder and the silicon carbide fine powder is 0.045mm, the main component contents of the alpha-alumina micro powder, the calcium hydroxide micro powder and the calcium oxide micro powder are more than 99wt%, the average grain diameters of the alpha-alumina micro powder, the calcium hydroxide micro powder and the calcium oxide micro powder are less than 2 mu m, the water reducing agent is ADS and ADW, the composite admixture is PVA, sodium carboxymethylcellulose and rho-Al 2 O 3 ；
2) Adding water which accounts for 100wt% of the raw materials of the dense layer, namely 100kg of water, into the proportioned raw materials of the dense layer, and carrying out ball milling to prepare slurry;
3) Preparing materials according to the components and proportion of the castable body after the anti-explosion fibers are removed, adding water accounting for 5wt% of the raw materials of the castable body into the prepared materials, uniformly stirring, pouring or spraying the prepared materials to a dovetail groove and the upper part of a cooling wall, uniformly spreading the anti-explosion fibers in the corresponding proportion on the surface and naturally blending the anti-explosion fibers into the surface of the castable, and burning off the anti-explosion fibers after natural curing for 24 hours to obtain the blast furnace type garbage incinerator wear-resistant alkali-cracking-resistant integral precast block body;
4) Spraying or painting the slurry prepared in the step 1) on the surface of the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator, drying for 24 hours at the temperature of 130 ℃, and baking for 3 hours at the temperature of 600 ℃ to obtain the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator.
The compression strength of the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator prepared by the embodiment can reach 55-65MPa after 1300 ℃ for 3h, the apparent porosity of a surface dense layer can be as low as 5-6%, the porosity is far lower than that of the current cooling wall inlaid brick by about 20%, and the integral volume weight is reduced to 1.9-2.1g/cm 3 On the basis of the wear resistance of the brick reaches less than 5.8cm close to that of the brick inlaid on the current cooling wall 3 And performing an alkali corrosion resistance test at 1100 ℃ for 3h, wherein the alkali metal element is blocked outside the compact layer, the penetration depth is less than 1.3mm and far lower than that of the current cooling wall inlaid brick by 4-6mm, and no obvious penetration and corrosion exist.
Claims (5)
1. A blast furnace type garbage incinerator wear-resistant alkali-resistant integral precast block is characterized in that the precast block consists of a castable body and a compact layer,
the castable comprises the following main body components in parts by mass:
25-40 parts of calcium hexaluminate particles
Silicon carbide particles 18-32 parts
4-11 parts of alumina hollow sphere particles
8-12 parts of calcium hexaluminate fine powder
4-8 parts of alpha-alumina micro powder
3-8 parts of aluminum hydroxide micropowder
5-12 parts of silicon carbide fine powder
3-8 parts of calcium oxide micro powder
0.05 to 0.1 portion of explosion-proof fiber
0.15 to 0.3 portion of water reducing agent
4-8 parts of pure calcium aluminate cement
The compact layer comprises the following components in percentage by weight:
10-20 parts of aluminum hydroxide micro powder
30-60 parts of alpha-alumina micro powder
5-15 parts of anorthite micro powder
20-40 parts of silicon carbide fine powder
Acrylic resin 1.5-3 parts
1.5-4 parts of a composite additive.
2. The wear-resistant alkali-cracking-resistant monolithic precast block for the blast furnace type waste incinerator according to claim 1, characterized in that Al in said calcium hexaluminate particles 2 O 3 The content is not less than 90wt%, wherein the content of calcium hexaluminate particles with the particle size of 3-5mm is 15-27wt%, the content of calcium hexaluminate particles with the particle size of less than 3mm and not more than 1mm is 35-50wt%, the content of calcium hexaluminate particles with the particle size of less than 1mm and not more than 0.1mm is 33-39wt%, and Al in the alumina hollow ball particles 2 O 3 The content of the calcium hexaluminate fine powder and the silicon carbide fine powder is more than or equal to 95wt%, the particle size of the aluminum oxide hollow sphere particles is 0-3mm, the content of SiC in the silicon carbide particles is more than or equal to 99.5wt%, the content of the silicon carbide particles with the particle size of 1-3mm is 55-75wt%, the content of the silicon carbide particles with the particle size of less than or equal to 0.1mm is 25-45wt%, the average particle size of the calcium hexaluminate fine powder and the silicon carbide fine powder is 0.045mm, the contents of main components of the alpha-aluminum oxide fine powder, the calcium hydroxide fine powder and the calcium oxide fine powder are more than 99wt%, and the average particle size of the alpha-aluminum oxide fine powder, the calcium hydroxide fine powder and the calcium oxide fine powder is less than 2 mu m.
3. The wear-resistant alkali-cracking-resistant monolithic precast block of the blast furnace type waste incinerator according to claim 1, wherein the water reducing agent is one or more of ADS and ADW.
4. The wear-resistant alkali-cracking-resistant integral precast block for the blast furnace type waste incinerator according to claim 1, characterized in that the composite additive is PVA, sodium carboxymethylcellulose and rho-Al 2 O 3 One or more of (a).
5. A method for preparing a wear-resistant alkali-resistant cracking-resistant integral precast block of a blast furnace type garbage incinerator is characterized by comprising the following steps,
1) Adding water accounting for 80-120wt% of the total amount of the raw materials of the dense layer into the proportioned raw materials of the dense layer, and performing ball milling to prepare slurry;
2) Preparing materials according to the components and proportion of the castable body after the anti-explosion fibers are removed, adding water accounting for 5-8wt% of the total weight of the castable body raw materials into the prepared materials, uniformly stirring, pouring or spraying the materials onto a dovetail groove and the upper part of a cooling wall, uniformly spreading the anti-explosion fibers in a corresponding proportion on the surface, naturally melting the anti-explosion fibers into the surface of the castable, and burning off the anti-explosion fibers after natural curing for 24 hours to obtain the blast furnace type garbage incinerator wear-resistant alkali-cracking-resistant integral precast block body;
3) Spraying or painting the slurry prepared in the step 1) on the surface of the wear-resistant alkali-cracking-resistant integral precast block body of the blast furnace type garbage incinerator, drying for 24 hours at the temperature of 110-130 ℃, and baking for 3 hours at the temperature of 600-800 ℃ to obtain the wear-resistant alkali-cracking-resistant integral precast block of the blast furnace type garbage incinerator.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190728A (en) * | 2007-01-31 | 2008-08-21 | Kurosaki Harima Corp | Lining structure of industrial kiln or its accessory equipment and precast refractory block for use in it |
| CN106966740A (en) * | 2017-05-16 | 2017-07-21 | 武汉科技大学 | Waste incinerator calcium hexaluminate/silicon carbide castable and preparation method thereof |
| CN210951332U (en) * | 2019-07-05 | 2020-07-07 | 浙江正豪耐火材料股份有限公司 | Mullite prefabricated member for garbage incinerator |
| CN114292118A (en) * | 2022-02-23 | 2022-04-08 | 上海利尔耐火材料有限公司 | Long-life castable for waste incinerator and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190728A (en) * | 2007-01-31 | 2008-08-21 | Kurosaki Harima Corp | Lining structure of industrial kiln or its accessory equipment and precast refractory block for use in it |
| CN106966740A (en) * | 2017-05-16 | 2017-07-21 | 武汉科技大学 | Waste incinerator calcium hexaluminate/silicon carbide castable and preparation method thereof |
| CN210951332U (en) * | 2019-07-05 | 2020-07-07 | 浙江正豪耐火材料股份有限公司 | Mullite prefabricated member for garbage incinerator |
| CN114292118A (en) * | 2022-02-23 | 2022-04-08 | 上海利尔耐火材料有限公司 | Long-life castable for waste incinerator and preparation method thereof |
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