CN111099883A - Corundum brick for hazardous waste rotary kiln and preparation method thereof - Google Patents
Corundum brick for hazardous waste rotary kiln and preparation method thereof Download PDFInfo
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- CN111099883A CN111099883A CN201911371084.9A CN201911371084A CN111099883A CN 111099883 A CN111099883 A CN 111099883A CN 201911371084 A CN201911371084 A CN 201911371084A CN 111099883 A CN111099883 A CN 111099883A
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- corundum
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- corundum brick
- rotary kiln
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6022—Injection moulding
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/606—Drying
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a corundum brick for a hazardous waste rotary kiln, which comprises the following components, by mass, 85-90% of corundum, 3-8% of alumina micropowder, 0.1-0.3% of an activating agent and 3-8% of pure calcium aluminate cement. The invention also provides a preparation method of the corundum brick for the hazardous waste rotary kiln. According to the corundum brick, the activating agent is added into the raw materials, so that the fluidity of the mixture is improved, the corundum brick is formed by adopting a vibration table pouring forming mode in the later period, the compactness of the corundum brick is improved, the thermal stress of the corundum brick is reduced, the corundum brick is not easy to crack, and the anti-corrosion effect is good.
Description
Technical Field
The invention relates to the field of refractory materials, in particular to a corundum brick for a hazardous waste rotary kiln.
Background
The corundum brick is widely applied to the hazardous waste rotary kiln due to good erosion resistance, but the corundum brick for the rotary kiln in the prior art adopts a pressing mode of vibration forming in a vibration press during forming, so that the corundum brick has a layered structure inside, large thermal stress, poor erosion resistance effect and easy cracking.
Disclosure of Invention
The invention aims to provide a corundum brick for a hazardous waste rotary kiln.
The invention also provides a preparation method of the corundum brick for the hazardous waste rotary kiln.
The invention has the innovation points that the activating agent is added into the raw materials, the fluidity of the raw materials is increased, the corundum brick is formed by adopting a vibration table pouring forming mode in the later period, the compactness of the corundum brick is increased, the thermal stress of the brick is reduced, the corundum brick is not easy to crack, and the anti-corrosion effect is good.
In order to achieve the purpose, the technical scheme of the invention is as follows: the corundum brick for the hazardous waste rotary kiln comprises, by mass, 85-90% of corundum, 3-8% of alumina micropowder, 0.1-0.3% of an activating agent and 3-8% of pure calcium aluminate cement.
Further, the corundum brick is composed of one or more of electric melting corundum or plate-shaped corundum.
Further, the corundum comprises 2-3 parts of corundum with the granularity grade of 0-0.045 mm, 3-4 parts of corundum with the granularity grade of 0.045-1 mm, 3-4 parts of corundum with the granularity grade of 1-3 mm, 3-4 parts of corundum with the granularity grade of 3-5 mm and 2-3 parts of corundum with the granularity grade of 5-8 mm.
Further, the activating agent is an NF water reducing agent.
A preparation method of corundum bricks for hazardous waste rotary kilns comprises the following steps:
(1) taking raw materials according to a formula, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 4.5-5.5% of the mass of the raw materials;
(2) pouring and molding the mixture on a vibration table, and naturally curing for 3-5 days after pouring and molding to obtain a molded blank;
(3) and drying the formed blank at 180-300 ℃ for 48-60 h, and then sintering at 1650-1700 ℃ for 72-84 h to obtain a finished product.
The invention has the beneficial effects that: according to the corundum brick, the activating agent is added into the raw materials, so that the fluidity of the mixture is improved, the corundum brick is formed by adopting a vibration table pouring forming mode in the later period, the compactness of the corundum brick is improved, the thermal stress of the corundum brick is reduced, the corundum brick is not easy to crack, and the anti-corrosion effect is good.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below.
Example 1: the corundum brick for the dangerous waste rotary kiln comprises the following components, by mass, 85% of corundum, 8% of alumina micropowder, 0.1% of an activating agent, 6.9% of pure calcium aluminate cement, and the corundum brick is fused corundum, wherein the corundum comprises, by weight, 2 parts of corundum with the granularity grade of 0-0.045 mm, 3 parts of corundum with the granularity of 0.045-1 mm, 3 parts of corundum with the granularity of 1-3 mm, 3 parts of corundum with the granularity of 3-5 mm, and 2 parts of corundum with the granularity of 5-8 mm, and the activating agent is an NF water reducing agent.
Example 2: the corundum brick for the dangerous waste rotary kiln comprises the following components, by mass, 90% of corundum, 3% of alumina micropowder, 0.3% of activating agent, 6.7% of pure calcium aluminate cement and tabular corundum. The corundum comprises 2.5 parts of corundum with the granularity grade of 0-0.045 mm, 3.5 parts of corundum with the granularity grade of 0.045-1 mm, 3.5 parts of corundum with the granularity grade of 1-3 mm, 3.5 parts of corundum with the granularity grade of 3-5 mm and 2.5 parts of corundum with the granularity grade of 5-8 mm in parts by weight, and the activating agent is an NF water reducing agent.
Example 3: the corundum brick for the dangerous waste rotary kiln comprises, by mass, 87% of corundum, 4.8% of alumina micropowder, 0.2% of an activating agent and 8% of pure calcium aluminate cement, wherein the corundum brick is composed of one or more of fused corundum or plate-shaped corundum. The corundum comprises 3 parts of 0-0.045 mm, 4 parts of 0.045-1 mm, 4 parts of 1-3 mm, 4 parts of 3-5 mm and 3 parts of 5-8 mm in parts by weight, and the activating agent is an NF water reducing agent.
Example 4: the corundum brick for the dangerous waste rotary kiln comprises 88.8% of corundum, 8% of alumina micropowder, 0.2% of activating agent and 3% of pure calcium aluminate cement by mass, wherein the corundum brick is composed of one or more of fused corundum or plate-shaped corundum. The corundum comprises 2.8 parts of corundum with the granularity grade of 0-0.045 mm, 3.8 parts of corundum with the granularity grade of 0.045-1 mm, 3.8 parts of corundum with the granularity grade of 1-3 mm, 3.8 parts of corundum with the granularity grade of 3-5 mm and 2.8 parts of corundum with the granularity grade of 5-8 mm in parts by weight, and the activating agent is an NF water reducing agent.
Example 5: a preparation method of corundum bricks for hazardous waste rotary kilns comprises the following steps: taking the raw materials according to the formula of the embodiment 1, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 4.5% of the mass of the raw materials; pouring and molding the mixture on a vibration table, and naturally curing for 3 days after pouring and molding to obtain a molded blank; and drying the molded blank at 180 ℃ for 48h, and sintering at 1680 ℃ for 72h to obtain a finished product.
Example 6: a preparation method of corundum bricks for hazardous waste rotary kilns comprises the following steps: taking the raw materials according to the formula of the embodiment 2, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 5% of the mass of the raw materials; pouring and molding the mixture on a vibration table, and naturally curing for 4 days after pouring and molding to obtain a molded blank; and drying the molded blank at 250 ℃ for 54h, and then sintering at 1650 ℃ for 78h to obtain a finished product.
Example 7: a preparation method of corundum bricks for hazardous waste rotary kilns comprises the following steps: taking the raw materials according to the formula of the embodiment 3, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 5.5% of the mass of the raw materials; pouring and molding the mixture on a vibration table, and naturally curing for 5 days after pouring and molding to obtain a molded blank; and drying the molded blank at 300 ℃ for 60h, and sintering at 1700 ℃ for 84h to obtain a finished product.
Example 8: a preparation method of corundum bricks for hazardous waste rotary kilns comprises the following steps: taking the raw materials according to the formula of the embodiment 4, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 5.3% of the mass of the raw materials; pouring and molding the mixture on a vibration table, and naturally curing for 4 days after pouring and molding to obtain a molded blank; and drying the molded blank at 280 ℃ for 60h, and sintering at 1680 ℃ for 80h to obtain a finished product.
The described embodiments are only some embodiments of the invention, not all embodiments. 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.
Claims (5)
1. The corundum brick for the hazardous waste rotary kiln is characterized by comprising the following components, by mass, 85-90% of corundum, 3-8% of alumina micropowder, 0.1-0.3% of activating agent and 3-8% of pure calcium aluminate cement.
2. The corundum brick for the hazardous waste rotary kiln according to claim 1, characterized in that the corundum brick is composed of one or more of electro-fused corundum or plate-shaped corundum.
3. The corundum brick for the dangerous waste rotary kiln according to claim 1, characterized in that the corundum brick comprises 2-3 parts of corundum with the granularity grade of 0-0.045 mm, 3-4 parts of corundum with the granularity grade of 0.045-1 mm, 3-4 parts of corundum with the granularity grade of 1-3 mm, 3-4 parts of corundum with the granularity grade of 3-5 mm and 2-3 parts of corundum with the granularity grade of 5-8 mm in parts by weight.
4. The corundum brick for the hazardous waste rotary kiln according to claim 1, characterized in that the activating agent is NF water reducing agent.
5. The preparation method of the corundum brick for the hazardous waste rotary kiln according to claim 1 is characterized by comprising the following steps:
(1) taking raw materials according to a formula, premixing the raw materials, adding water, and uniformly stirring to obtain a mixture, wherein the adding amount of the water is 4.5-5.5% of the mass of the raw materials;
(2) pouring and molding the mixture on a vibration table, and naturally curing for 3-5 days after pouring and molding to obtain a molded blank;
(3) and drying the formed blank at 180-300 ℃ for 48-60 h, and then sintering at 1650-1700 ℃ for 72-84 h to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911371084.9A CN111099883A (en) | 2019-12-27 | 2019-12-27 | Corundum brick for hazardous waste rotary kiln and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911371084.9A CN111099883A (en) | 2019-12-27 | 2019-12-27 | Corundum brick for hazardous waste rotary kiln and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111099883A true CN111099883A (en) | 2020-05-05 |
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| CN201911371084.9A Pending CN111099883A (en) | 2019-12-27 | 2019-12-27 | Corundum brick for hazardous waste rotary kiln and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686923A (en) * | 2005-03-29 | 2005-10-26 | 郑州大学 | Method for preparing corundum bricks composite with Nano alpha-Al2O3 |
| CN103613398A (en) * | 2013-12-10 | 2014-03-05 | 武汉钢铁(集团)公司 | Castable for ladle collector nozzle adopting corundum collector nozzle reclaimed material as aggregate and preparation method of castable |
| CN104761268A (en) * | 2015-03-19 | 2015-07-08 | 通达耐火技术股份有限公司 | Homogenized corundum refractory castable and preparation method thereof |
| CN104909771A (en) * | 2015-06-03 | 2015-09-16 | 武汉科技大学 | Calcium aluminate cement-combined corundum castable and preparation method thereof |
-
2019
- 2019-12-27 CN CN201911371084.9A patent/CN111099883A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686923A (en) * | 2005-03-29 | 2005-10-26 | 郑州大学 | Method for preparing corundum bricks composite with Nano alpha-Al2O3 |
| CN103613398A (en) * | 2013-12-10 | 2014-03-05 | 武汉钢铁(集团)公司 | Castable for ladle collector nozzle adopting corundum collector nozzle reclaimed material as aggregate and preparation method of castable |
| CN104761268A (en) * | 2015-03-19 | 2015-07-08 | 通达耐火技术股份有限公司 | Homogenized corundum refractory castable and preparation method thereof |
| CN104909771A (en) * | 2015-06-03 | 2015-09-16 | 武汉科技大学 | Calcium aluminate cement-combined corundum castable and preparation method thereof |
Non-Patent Citations (5)
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| 张彬: "《混凝土外加剂及其应用手册》", 30 November 2012, 天津大学出版社 * |
| 李文平 等: "氧化铝微粉与减水剂对刚玉质浇注料施工性能的影响", 《耐火材料》 * |
| 王诚训 等: "《耐火浇注料及其技术发展》", 30 April 2015, 冶金工业出版社 * |
| 白晨 等: "氧化铝微粉对刚玉浇注料高温性能的影响", 《硅酸盐学报》 * |
| 陈昆柏 等: "《危险废物处理与处置》", 31 January 2017, 河南科学技术出版社 * |
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Application publication date: 20200505 |