CN111964434A - Low-heat-conduction brick for cement rotary kiln and production method thereof - Google Patents
Low-heat-conduction brick for cement rotary kiln and production method thereof Download PDFInfo
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- CN111964434A CN111964434A CN202010759982.8A CN202010759982A CN111964434A CN 111964434 A CN111964434 A CN 111964434A CN 202010759982 A CN202010759982 A CN 202010759982A CN 111964434 A CN111964434 A CN 111964434A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/28—Arrangements of linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
Abstract
The invention belongs to refractory materials and a production method thereof, and particularly relates to a low-heat-conductivity brick for a cement rotary kiln and a production method thereof, wherein the production method comprises the following steps: mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder and magnesia fine powder, adding a bonding agent to prepare a pug, pressing the pug into a blank, drying, and firing in a high-temperature tunnel kiln to obtain the main refractory brick. Placing a main body brick on an operation platform, clamping a grinding tool, occluding a steel mesh with the main body brick, adding a bonding agent into a raw material of the heat insulator, mixing, pouring a casting material into the grinding tool according to a specified amount, carrying out vibration molding after 24 hours, demoulding, drying to 350 ℃, cooling and packaging. Has the advantages that: the present invention solves the problem of magnesium chromium in rotary cement kilnCr of brick6+The temperature of the rotary cement kiln barrel is reduced while the pollution problem is solved, the service life of bricks for the transition zone of the rotary cement kiln which are utilized in multiple aspects is prolonged, and the energy and equipment consumption is reduced.
Description
Technical Field
The invention belongs to refractory materials and a production method thereof, and particularly relates to a low-heat-conductivity brick for a cement rotary kiln and a production method thereof.
Background
Because the magnesia-chrome brick is used in a cement dry-method line rotary kiln, part of chromium in the magnesia-chrome brick can be changed from' Cr3+Cr converted into virulent and carcinogenic Cr6+"destroy the environment and affect the life health of people. Therefore, there is a trend and a development direction of a chromium-free pollution-free refractory product as an alkali material for cement kilns. Meanwhile, the cement industry is taken as an important building material industry, and the pressure of energy conservation and emission reduction is the first place to come. On one hand, the method faces the continuously improved energy consumption reduction standard of China and places, on the other hand, the method is the internal requirement of enterprises with severe industrial situation on reducing the production cost, and both the method and the system require the cement enterprises to actively develop energy-saving technical improvement.
In cement production, heat is mainly consumed in the calcination of clinker. It has been found that the heat loss during calcination is mainly in three aspects: heat loss from the surface of the kiln system; heat loss from system exhaust; heat loss from the clinker in the cooler. With the maturity of vertical mill and low-temperature waste heat power generation technology in recent years, the heat loss of the system exhaust gas is fully utilized; due to the emergence of the fourth generation grate cooler and the fifth generation grate cooler, the efficiency of the cooler is also obviously improved. Therefore, it is very important to reduce the heat loss of the surface heat dissipation of the kiln system. For more than 10 years, a large number of researches on magnesia-chrome brick substitute materials are carried out at home and abroad, and the magnesia-alumina spinel bricks and magnesia-iron spinel bricks which are gradually popularized and used at present gradually replace magnesia-chrome bricks to be used in a rotary kiln burning zone and a transition zone.
However, there are problems that: these products have a high thermal conductivity relative to the magnesite-chrome bricks, resulting in a slightly higher temperature of the outer cylinder of the rotary kiln relative to the temperature of the inner lining of the magnesite-chrome bricks. The kiln coating protection is still arranged on the burning zone, the temperature of the cylinder body is relatively low, the transition zone has no stable kiln coating protection, and the cylinder body is easily deformed to cause potential safety hazard due to overhigh temperature in the operation process of the rotary kiln; meanwhile, excessive heat loss also causes energy waste.
Therefore, we propose a low thermal conductivity brick for a cement rotary kiln and a production method thereof to solve the above problems.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a Cr-containing alloy which solves the problems of Cr6+The low heat conducting brick for the rotary cement kiln and the production method thereof solve the problem of pollution and public hazard and simultaneously reduce the temperature of a cylinder of the rotary cement kiln.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a cement rotary kiln is with low heat conduction brick, includes main part firebrick part and insulator part, main part firebrick part adopts magnesium aluminium spinel brick material, the insulator part adopts steel mesh and pouring material to constitute, the insulator part is close to fixedly connected with bar stopper on the terminal surface of main part firebrick part, be equipped with the spacing fluting that matches with the bar stopper on the terminal surface of insulator part is close to the main part firebrick part, bar stopper cross-section is trapezoidal.
In the low-heat-conductivity brick for the cement rotary kiln, the chemical weight percentage of the main body refractory brick part is as follows: "MgO: 80-95% "," Al2O310-15% "; the castable for the heat insulation body part on the steel mesh comprises the following components in percentage by weight: "Al2O3：90-98％”，“SiO2：0.1-2.0％”，“CaO：0.1-2.0％”。
In the low-heat-conductivity brick for the cement rotary kiln, a layer of refractory cotton is placed between the main body refractory brick part and the heat insulator part.
In the low heat-conducting brick for the cement rotary kiln, the steel mesh of the heat insulator part is formed by welding 304 stainless steel wires with the diameter of 2-3 mm.
The method for producing the low-heat-conductivity brick for the cement rotary kiln comprises the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and sintering in a high-temperature tunnel kiln to obtain a main refractory brick part;
c. pouring the castable in the steel mesh;
d. fixing a main body refractory brick part on the operating platform, and putting a steel mesh of the heat insulator part into a specified position to be meshed with the main body refractory brick part;
e. mixing corundum particles, light material particles, corundum fine powder and added micro powder of the castable of the heat insulator part with water, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
Compared with the prior art, the low-heat-conductivity brick for the cement rotary kiln and the production method thereof have the advantages that: the low-heat-conductivity brick can be used in the field of suitable high temperature, in particular to a burning zone and a transition zone of a novel dry-process line rotary kiln, and solves the problem of Cr of a magnesia-chrome brick for the burning zone6+The pollution problem can not only meet the use requirements of the cement kiln, but also have good heat preservation and insulation effects, the surface temperature of the cylinder body is reduced by 50-80 ℃, meanwhile, the masonry weight per unit volume is reduced, the abrasion of the belt wheel and the deformation rate of the cylinder body are effectively reduced, and the service life of the cement kiln is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a low thermal conductivity brick for a rotary cement kiln, provided by the invention;
FIG. 2 is a schematic structural diagram of a front view of a steel mesh in a low thermal conductivity brick for a rotary cement kiln, according to the present invention;
FIG. 3 is a schematic structural diagram of a top view of a steel mesh in a low thermal conductivity brick for a rotary cement kiln, according to the present invention;
FIG. 4 is a schematic structural view of a main refractory brick portion of a heat insulating block portion in a low heat-conducting brick for a rotary cement kiln, provided by the invention;
FIG. 5 is a schematic structural diagram of a low thermal conductivity brick for a rotary cement kiln provided by the invention.
The meaning of the reference symbols in the figures: 1-main body firebrick part, 2-insulator part, 3-strip-shaped limiting block and 4-steel mesh.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-4, a low thermal conductivity brick for a cement rotary kiln comprises a main body refractory brick part 1 and an insulator part 2, wherein the main body refractory brick part 1 adopts magnesite with a limit granularity of 5mm, which is relatively convenient to implement in the field of national refractory materials, and the magnesite can be selected from fused magnesite and sintered magnesite with a granularity of 5 mm; the ground substance part is fine powder with the granularity of 0.075 mm; meanwhile, adding magnesia-alumina spinel particles, wherein the magnesia-alumina spinel can be selected from sintered magnesia-alumina spinel and electric fused magnesia-alumina spinel, the particle size is 3mm, and the particle size of a substrate part is 0.075mm fine powder; the fineness of the additive micro powder is 0.045mm, and the steel mesh 4 of the heat insulator part 2 is formed by welding 304 stainless steel wires with the diameter of 2 mm.
One deck refractory wool has been placed between main part firebrick part 1 and insulator part 2, and refractory wool thickness is 1, and main part firebrick part 1 chemical weight percent becomes: "MgO: 80% "," Al2O310% "; the chemical weight percentage composition of the castable on the steel pipe of the heat insulator part 2 is as follows: "Al2O3：90％”，“SiO2: 0.1% "," CaO: 0.1% ", the main body firebrick part 1 adopts magnesia-alumina spinel brick material.
The heat insulator part 2 is composed of a steel mesh 4 and a casting material, the heat insulator part 2 is formed by placing the steel mesh 4 at a position meshed with the main body refractory brick part 1, pouring 5mm corundum particles, 3mm light material particles, 0.045mm corundum fine powder and 10 mu m added micro powder into a grinding tool with the steel mesh 4 placed therein according to a specified amount after being mixed well in a mixing way, carrying out vibration molding, demoulding after 24 hours, curing for more than 48 hours, drying to 350 ℃ and preserving heat for 48 hours, the heat insulator part 2 is fixedly connected with a strip-shaped limiting block 3 on the end surface close to the main body refractory brick part 1, a limiting groove matched with the strip-shaped limiting block 3 is arranged on the end surface close to the heat insulator part 2 of the main body refractory brick part 1, and the section of the strip-shaped limiting block.
A method for producing low-heat-conductivity bricks for a cement rotary kiln comprises the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and sintering the green body in a high-temperature tunnel kiln to obtain a main body refractory brick part 1, wherein the drying temperature is 100 ℃, and the sintering temperature is 1550 ℃;
c. pouring refractory castable in the steel mesh 4;
d. fixing the main body firebrick part 1 on an operation platform, and putting a steel mesh 4 of the heat insulator part 2 into a designated position to be occluded with the main body firebrick part 1;
e. mixing corundum particles, light material particles, corundum fine powder and added micro powder of the castable of the heat insulator part 2 with water, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
Example 2
As shown in fig. 1-4, a low thermal conductivity brick for a cement rotary kiln comprises a main body refractory brick part 1 and an insulator part 2, wherein the main body refractory brick part 1 adopts magnesite with a limit granularity of 5mm, which is relatively convenient to implement in the field of national refractory materials, and the magnesite can be selected from fused magnesite and sintered magnesite with a granularity of 0.088 mm; the part of the matrix has 0.045mm fine powder; meanwhile, adding magnesia-alumina spinel particles, wherein the magnesia-alumina spinel can be selected from sintered magnesia-alumina spinel and electric fused magnesia-alumina spinel, the particle size is 0.088mm, and the particle size of the matrix part is 0.045mm fine powder; the fineness of the additive micro powder is below 0.025mm, and the steel mesh 4 of the heat insulator part 2 is formed by welding 304 stainless steel wires with the diameter of 3 mm.
One deck refractory wool has been placed between main part firebrick part 1 and insulator part 2, and refractory wool thickness is 2mm, and main part firebrick part 1 chemical weight percent becomes: "MgO: 95% "," Al2O3: 15% "; the chemical weight percentage composition of the castable on the steel pipe of the heat insulator part 2 is as follows: "Al2O3：98％”，“SiO2: 2.0% "," CaO: 2.0% ", the main body refractory brick part 1 adopts magnesia-alumina spinel brick material.
The heat insulator part 2 is composed of a steel mesh 4 and a casting material, the heat insulator part 2 is prepared by placing the steel mesh 4 at a position meshed with the main body refractory brick part 1, pouring 0.088mm corundum particles, 0.5mm light material particles, 0.045mm corundum fine powder and 10 mu m added micro powder into a grinding tool with the steel mesh 4 placed therein according to a specified amount after adding water and mixing to obtain good fluidity, carrying out vibration molding, demoulding after 48 hours, curing for more than 48 hours, drying to 350 ℃ and preserving heat for 48 hours, fixedly connecting a strip-shaped limiting block 3 on the end surface of the heat insulator part 2 close to the main body refractory brick part 1, arranging a limiting groove matched with the strip-shaped limiting block 3 on the end surface of the main body refractory brick part 1 close to the heat insulator part 2, and enabling the section of the strip-shaped limiting block.
A method for producing low-heat-conductivity bricks for a cement rotary kiln comprises the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and sintering the green body in a high-temperature tunnel kiln to obtain a main refractory brick part 1, wherein the drying temperature is 150 ℃ and the sintering temperature is 1700 ℃;
c. pouring refractory castable in the steel mesh 4;
d. fixing the main body firebrick part 1 on an operation platform, and putting a steel mesh 4 of the heat insulator part 2 into a designated position to be occluded with the main body firebrick part 1;
e. mixing corundum particles, light material particles, corundum fine powder and added micro powder of the castable of the heat insulator part 2 with water, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
Example 3
As shown in fig. 1-4, a low thermal conductivity brick for a cement rotary kiln comprises a main body refractory brick part 1 and an insulator part 2, wherein the main body refractory brick part 1 adopts magnesite with a limit granularity of 5mm, which is relatively convenient to implement in the field of national refractory materials, and the magnesite can be selected from fused magnesite and sintered magnesite with a granularity of 3.088 mm; the part of the matrix is fine powder with the granularity of 0.065 mm; meanwhile, adding magnesia-alumina spinel particles, wherein the magnesia-alumina spinel can be selected from sintered magnesia-alumina spinel and electric fused magnesia-alumina spinel, the particle size is 2.088mm, and the particle size of a substrate part is 0.065mm fine powder; the fineness of the additive micro powder is 0.035mm, and the steel mesh 4 of the heat insulator part 2 is formed by welding 304 stainless steel wires with the diameter of 2.7 mm.
A layer of refractory wool is placed between the main refractory brick part 1 and the heat insulator part 2, the thickness of the refractory wool is 1.7mm, and the main refractory brick part 1 comprises the following chemical components in percentage by weight: "MgO: 90% "," Al2O3: 14% "; the chemical weight percentage composition of the castable on the steel pipe of the heat insulator part 2 is as follows: "Al2O3：96％”，“SiO21.5% ", CaO: 1.5% ", the main body firebrick part 1 adopts magnesia-alumina spinel brick material.
The heat insulator part 2 is composed of a steel mesh 4 and a casting material, the casting material of the heat insulator part 2 is that the steel mesh 4 is placed at a position meshed with the main body refractory brick part 1, 3.088mm corundum particles, 2.5mm light material particles, 0.045mm corundum fine powder and 10 mu m added micro powder are added with water and mixed to have good fluidity, the casting material is poured into a grinding tool with the steel mesh 4 placed therein according to a specified amount to be vibrated and formed, demoulding is carried out after 40 hours, the heat insulator part is cured for more than 48 hours and dried to 350 ℃ and is insulated for 48 hours, a strip-shaped limiting block 3 is fixedly connected on the end face of the heat insulator part 2 close to the main body refractory brick part 1, a limiting groove matched with the strip-shaped limiting block 3 is arranged on the end face of the main body refractory brick part.
A method for producing low-heat-conductivity bricks for a cement rotary kiln comprises the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and firing the green body in a high-temperature tunnel kiln to obtain a main refractory brick part 1, wherein the drying temperature is 138 ℃, and the firing temperature is 1660 ℃;
c. pouring refractory castable in the steel mesh 4;
d. fixing the main body firebrick part 1 on an operation platform, and putting a steel mesh 4 of the heat insulator part 2 into a designated position to be occluded with the main body firebrick part 1;
e. mixing corundum particles, light material particles, corundum fine powder and added micro powder of the castable of the heat insulator part 2 with water, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
Example 4
As shown in fig. 1-4, a low thermal conductivity brick for a cement rotary kiln comprises a main body refractory brick part 1 and an insulator part 2, wherein the main body refractory brick part 1 adopts magnesite with a limit granularity of 5mm, which is relatively convenient to implement in the field of national refractory materials, and the magnesite can be selected from fused magnesite and sintered magnesite with a granularity of 2.088 mm; fine powder with the granularity of 0.055mm of the substrate part; meanwhile, adding magnesium aluminate spinel particles, wherein the magnesium aluminate spinel can be selected from sintered magnesium aluminate spinel and electric fused magnesium aluminate spinel, the particle size is 1.088mm, and the particle size of a substrate part is 0.055mm fine powder; the fineness of the additive micro powder is 0.025mm, and the steel mesh 4 of the heat insulator part 2 is formed by welding 304 stainless steel wires with the diameter of 2.3 mm.
A layer of refractory wool is placed between the main refractory brick part 1 and the heat insulator part 2, the thickness of the refractory wool is 1.3mm, and the main refractory brick part 1 comprises the following chemical components in percentage by weight: "MgO: 85% "," Al2O312% "; the chemical weight percentage composition of the castable on the steel pipe of the heat insulator part 2 is as follows: "Al2O3：93％”，“SiO2: 0.7% "," CaO: 0.7% ", the main body firebrick part 1 adopts magnesia-alumina spinel brick material.
The heat insulator part 2 is composed of a steel mesh 4 and a casting material, the casting material of the heat insulator part 2 is that the steel mesh 4 is placed at a position meshed with the main body refractory brick part 1, 2.088mm corundum particles, 1.5mm light material particles, 0.045mm corundum fine powder and 10 mu m added micro powder are added with water and mixed to have good fluidity, the casting material is poured into a grinding tool with the steel mesh 4 placed therein according to a specified amount for vibration forming, demoulding is carried out after 32 hours, curing is carried out for more than 48 hours, drying is carried out to 350 ℃ and heat preservation is carried out for 48 hours, a strip-shaped limiting block 3 is fixedly connected on the end face of the heat insulator part 2 close to the main body refractory brick part 1, a limiting groove matched with the strip-shaped limiting block 3 is arranged on the end face of the main body refractory.
A method for producing low-heat-conductivity bricks for a cement rotary kiln comprises the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and firing the green body in a high-temperature tunnel kiln to obtain a main refractory brick part 1, wherein the drying temperature is 120 ℃, and the firing temperature is 1600 ℃;
c. pouring refractory castable in the steel mesh 4;
d. fixing the main body firebrick part 1 on an operation platform, and putting a steel mesh 4 of the heat insulator part 2 into a designated position to be occluded with the main body firebrick part 1;
e. mixing corundum particles, light material particles, corundum fine powder and added micro powder of the castable of the heat insulator part 2 with water, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
Although the terms body refractory brick portion 1, insulator portion 2, strip-shaped stoppers 3 and steel mesh 4 are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (5)
1. The utility model provides a cement rotary kiln is with low heat conduction brick, includes main part firebrick part (1) and insulator part (2), its characterized in that, main part firebrick part (1) adopts magnesium aluminium spinel brick material, insulator part (2) adopt steel mesh (4) and pouring material to constitute, insulator part (2) are close to fixedly connected with bar stopper (3) on the terminal surface of main part firebrick part (1), main part firebrick part (1) are close to be equipped with on the terminal surface of insulator part (2) with the spacing fluting that bar stopper (3) match, bar stopper (3) cross-section is trapezoidal.
2. The low thermal conductivity brick for the cement rotary kiln as claimed in claim 1, wherein the main body refractory brick portion (1) comprises the following chemical components in percentage by weight: MgO: 80-95% of Al2O310-15 percent; the chemical weight percentage composition of the castable on the steel mesh of the heat insulator part (2) is as follows: al (Al)2O3：90-98％，SiO2:0.1-2.0％，CaO：0.1-2.0％。
3. The low thermal conductivity brick for the cement rotary kiln as claimed in claim 1, wherein a layer of refractory wool is placed between the main body refractory brick portion (1) and the insulator portion (2).
4. The low thermal conductivity brick for cement rotary kilns according to claim 1, characterized in that the steel mesh (4) of the insulator section (2) is welded by 304 stainless steel wires with a diameter of 2-3 mm.
5. The method for producing the low thermal conductive brick for the cement rotary kiln as claimed in claim 1, characterized by comprising the following steps:
a. mixing magnesia particles, magnesia-alumina spinel particles, spinel fine powder, magnesia fine powder and additive micro powder, and adding a bonding agent to prepare pug;
b. pressing the pug into a green body, drying and sintering in a high-temperature tunnel kiln to obtain a main body refractory brick part (1);
c. pouring the casting material in the steel mesh (4);
d. fixing a main body refractory brick part (1) on an operation platform, putting a steel mesh (4) of the heat insulator part (2) into a designated position, and meshing with the main body refractory brick part (1);
e. adding water into corundum particles, light material particles and corundum fine powder of the castable of the heat insulator part (2) and micro powder, mixing, and pouring the castable into a grinding tool according to a specified amount for vibration forming;
f. demoulding after 24 hours, drying to 350 ℃ and cooling to obtain the finished product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443897A (en) * | 2021-06-17 | 2021-09-28 | 鞍山市奥鞍耐火材料有限责任公司 | Low-heat-conductivity refractory material, low-heat-conductivity refractory brick, and preparation method and application thereof |
| CN113443898A (en) * | 2021-06-17 | 2021-09-28 | 鞍山市奥鞍耐火材料有限责任公司 | Low-thermal-conductivity spinel refractory homogeneous brick and preparation method and application thereof |
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| CN101863673A (en) * | 2010-06-07 | 2010-10-20 | 长兴锅炉耐火器材厂 | Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof |
| CN101928153A (en) * | 2010-09-01 | 2010-12-29 | 中国地质大学（北京） | Calcium hexaluminate and corundum composite porous light heat insulation refractory material and preparation method thereof |
| CN201852458U (en) * | 2010-10-14 | 2011-06-01 | 新兴能源装备有限公司 | Composite brick |
| CN105565794A (en) * | 2015-12-16 | 2016-05-11 | 淄博市鲁中耐火材料有限公司 | Preparation method of low-heat-conductivity magnesia-alumina spinel brick |
| CN207963463U (en) * | 2018-01-30 | 2018-10-12 | 通达耐火技术股份有限公司 | A kind of rotary kiln low leads composite brick with high-strength |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113443897A (en) * | 2021-06-17 | 2021-09-28 | 鞍山市奥鞍耐火材料有限责任公司 | Low-heat-conductivity refractory material, low-heat-conductivity refractory brick, and preparation method and application thereof |
| CN113443898A (en) * | 2021-06-17 | 2021-09-28 | 鞍山市奥鞍耐火材料有限责任公司 | Low-thermal-conductivity spinel refractory homogeneous brick and preparation method and application thereof |
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