CN111662075A - Composite aluminum silicon carbide brick and preparation method thereof - Google Patents
Composite aluminum silicon carbide brick and preparation method thereof Download PDFInfo
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- CN111662075A CN111662075A CN202010627668.4A CN202010627668A CN111662075A CN 111662075 A CN111662075 A CN 111662075A CN 202010627668 A CN202010627668 A CN 202010627668A CN 111662075 A CN111662075 A CN 111662075A
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- 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
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- 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
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- 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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- 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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- 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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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention relates to a composite aluminum silicon carbide brick and a preparation method thereof, belonging to the field of preparation of refractory materials, and the composite aluminum silicon carbide brick is prepared from the following raw materials in parts by weight, wherein the raw materials comprise 95% or more of Al2O3Not more than 98% of Fe2O35 to 10 portions of brown corundum less than or equal to 0.3 percent, and Al less than or equal to 88 percent2O3Not more than 98% of Fe2O360-80 parts of homogenizing material with the concentration of less than or equal to 2 percent and Al with the concentration of less than or equal to 98 percent2O3Not more than 99% and Fe2O35 to 10 portions of alumina powder with the concentration of less than or equal to 0.2 percent, SiC with the concentration of less than or equal to 95 percent and 98 percent and Fe2O310-20 parts of silicon carbide powder with the concentration of less than or equal to 0.8 percent, and Al with the concentration of less than or equal to 34 percent2O3Less than or equal to 40 percent and Fe2O38-15 parts of white mud with the concentration less than or equal to 1.5 percent. The composite aluminum silicon carbide brick can effectively improve the refractoriness under load of the traditional silica brick.
Description
Technical Field
The invention relates to a composite aluminum silicon carbide brick and a preparation method thereof, belonging to the field of preparation of refractory materials.
Background
As is well known, silica bricks are one kind of refractory material, but the prior silica bricks have high air holes and low refractoriness under load, so that the service life of the prior silica bricks is not long. Therefore, there is a need for improvement of the prior art to overcome the above technical problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite aluminum silicon carbide brick, which is realized by the following technical scheme:
the composite aluminum silicon carbide brick is prepared from the following raw materials in parts by weight, wherein Al is more than or equal to 95%2O3Not more than 98% of Fe2O35 to 10 portions of brown corundum less than or equal to 0.3 percent, and Al less than or equal to 88 percent2O3Not more than 98% of Fe2O360-80 parts of homogenizing material with the concentration of less than or equal to 2 percent and Al with the concentration of less than or equal to 98 percent2O3Not more than 99% and Fe2O35 to 10 portions of alumina powder with the concentration of less than or equal to 0.2 percent, SiC with the concentration of less than or equal to 95 percent and 98 percent and Fe2O310-20 parts of silicon carbide powder with the concentration of less than or equal to 0.8 percent, and Al with the concentration of less than or equal to 34 percent2O3Less than or equal to 40 percent and Fe2O38-15 parts of white mud with the concentration less than or equal to 1.5 percent.
Preferably, the brown corundum particles comprise 5 parts of brown corundum particles, 50 parts of homogenized material particles, 12 parts of homogenized material powder, 5 parts of alumina powder, 18 parts of silicon carbide powder and 10 parts of Guangxi white mud.
Preferably, the brown corundum particles comprise 5 parts of brown corundum particles, 52 parts of homogenized material particles, 13 parts of homogenized material powder, 5 parts of alumina powder, 15 parts of silicon carbide powder and 10 parts of Guangxi white mud.
Preferably, the brown corundum particles comprise 5 parts of brown corundum particles, 58 parts of melting material particles, 18 parts of homogenized material powder, 16 parts of silicon carbide powder and 8 parts of Guangxi white mud.
A method for preparing a composite aluminum silicon carbide brick mainly comprises the following process steps:
s1, mixing and stirring brown corundum, homogenized material, alumina powder, silicon carbide powder and water according to the proportion for 8-15 minutes;
s2: adding the white mud into S1, mixing and stirring for 8-15 minutes to form a blank for later use;
s3: the S2 blank is made into a blank with a fixed shape through a stamping die for later use;
s4: drying the blank in S3 at 110-140 deg.C for 6-10h to obtain semi-finished product
S5: the semi-finished product in S4 is fired for 10-15h at the high temperature of 1460-1500 ℃.
Preferably, in the step S4, the drying temperature is 130 ℃, and the drying time is 8 hours.
Preferably, in the step S5, the firing temperature is 1460 ℃ and the firing time is 12 hours.
Preferably, the white mud is Guangxi white mud.
The invention has the beneficial effects that:
1. the composite aluminum silicon carbide brick produced by the preparation method can effectively reduce the apparent porosity of the traditional silicon brick.
2. The composite aluminum silicon carbide brick produced by the preparation method can greatly improve the compressive strength of the traditional silica brick.
3. The composite aluminum silicon carbide brick produced by the preparation method can effectively improve the refractoriness under load of the traditional silica brick.
4. Effectively reduces the variety of raw materials, has simple process, low cost and is convenient for mass production.
Other advantageous effects of the present invention will be further described with reference to the following specific examples.
Detailed Description
The composite aluminum silicon carbide brick is prepared from the following raw materials in parts by weight, wherein Al is more than or equal to 95%2O3Not more than 98% of Fe2O35 to 10 portions of brown corundum less than or equal to 0.3 percent, and Al less than or equal to 88 percent2O3Not more than 98% of Fe2O360-80 parts of homogenizing material with the concentration of less than or equal to 2 percent and Al with the concentration of less than or equal to 98 percent2O3Not more than 99% and Fe2O35 to 10 portions of alumina powder with the concentration of less than or equal to 0.2 percent, SiC with the concentration of less than or equal to 95 percent and 98 percent and Fe2O310-20 parts of silicon carbide powder with the concentration of less than or equal to 0.8 percent, and Al with the concentration of less than or equal to 34 percent2O3Less than or equal to 40 percent and Fe2O38-15 parts of white mud with the concentration less than or equal to 1.5 percent. Setting Al as above2O3The range can effectively ensure the chemical index of the brick and the high-temperature performance, Fe, of the brick2O3Low melting compounds are formed at high temperatures, which are detrimental to the performance of the tile of the present invention. Provided with Fe2O3In a range to reduce the above-mentioned adverse effects.
The specific examples of the scheme and the properties of the products prepared by the examples are as follows:
example 1
The composite aluminum-silicon carbide fired brick comprises, by weight, 5 parts of brown corundum particles, 50 parts of homogenized material particles, 12 parts of homogenized material powder, 5 parts of alumina powder, 18 parts of silicon carbide powder and 10 parts of Guangxi white mud.
Example 2
The composite aluminum-silicon carbide fired brick comprises the following components, by weight, 5 parts of brown corundum particles, 52 parts of homogenizing material particles, 13 parts of homogenizing material powder, 5 parts of alumina powder, 15 parts of silicon carbide powder and 10 parts of Guangxi white mud.
Example 3
The composite aluminum silicon carbide brick comprises, by weight, 5 parts of brown corundum particles, 58 parts of homogenizing material particles, 18 parts of homogenizing material powder, 16 parts of silicon carbide powder and 8 parts of Guangxi white mud.
The performance criteria for the fired composite aluminum silicon carbide bricks obtained in examples 1-3 above are shown in Table 1:
(Table 1: Performance index Table of composite aluminum silicon carbide brick)
The change of the components can affect the chemical content of the brick, thereby affecting the normal temperature performance and the high temperature performance of the brick, such as air hole performance and pressure resistance performance, which are detailed in the table.
Any of the above examples 1-3 can be prepared by:
a method for preparing the composite aluminum silicon carbide brick mainly comprises the following process steps:
s1, mixing and stirring the material particles, the homogenized material powder, the alumina powder, the silicon carbide powder and water according to the proportion for 8-15 minutes;
s2: adding the white mud into S1, mixing and stirring for 8-15 minutes to form a blank for later use;
s3: the S2 billet is formed into a fixed profile blank through a stamping die, for example, using a 400T press, at one hammer per kilogram, for further use.
S4: drying the blank in S3 at 110-140 deg.C for 6-10h to obtain semi-finished product
S5: and firing the semi-finished product in S4 at the high temperature of 1400 ℃ and 1500 ℃ for 10-15 h.
The preferred scheme is as follows: and in the step S4, the drying temperature is 130 ℃, the drying time is 8 hours, and in the step S5, the firing temperature is 1460 ℃, and the firing time is 12 hours.
Through long-term research, the inventor finds that the blank is dried at the temperature of 130 ℃ for 8 hours continuously, the firing temperature is 1420 ℃, the apparent porosity of the clay brick obtained by continuously firing for 12 hours is about 17 percent, the temperature of the refractoriness under load is 0.2MPa, generally 1600 ℃, and the comprehensive performance of the clay brick is remarkably improved, so that the comprehensive performance of the composite aluminum silicon carbide brick is obviously superior to that of the common silicon brick. By adopting the drying temperature and time, the moisture in semi-finished brick blanks can be fully dried and removed, finished product cracks are reduced in the firing process, so that the porosity and the refractoriness under load of finished bricks are reduced, the firing temperature and time are selected, the high-temperature performance of the finished bricks can be guaranteed, the raw material aggregate and the powder are fully combined, so that the high strength is guaranteed, if the firing temperature is reduced and the time is shortened, the raw materials cannot be thoroughly combined, the compressive strength of the bricks is reduced, if the firing temperature is increased and the time is shortened, the size of the bricks is excessively shrunk, the bricks are seriously deformed, and the ceramization is generated.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. The utility model provides a compound aluminium carborundum brick which characterized in that: is prepared from (by weight portions) Al (95-95%2O3Not more than 98% of Fe2O35 to 10 portions of brown corundum less than or equal to 0.3 percent, and Al less than or equal to 88 percent2O3Not more than 98% of Fe2O360-80 parts of homogenizing material with the concentration of less than or equal to 2 percent and Al with the concentration of less than or equal to 98 percent2O3Not more than 99% and Fe2O35 to 10 portions of alumina powder with the concentration of less than or equal to 0.2 percent, and SiC with the concentration of less than or equal to 95 percent and less than or equal to 98 percentAnd Fe2O310-20 parts of silicon carbide powder with the concentration of less than or equal to 0.8 percent, and Al with the concentration of less than or equal to 34 percent2O3Less than or equal to 40 percent and Fe2O38-15 parts of white mud with the concentration less than or equal to 1.5 percent.
2. The composite aluminum silicon carbide tile of claim 1, wherein: 5 parts of brown corundum particles, 50 parts of homogenized material particles, 12 parts of homogenized material powder, 5 parts of alumina powder, 18 parts of silicon carbide powder and 10 parts of Guangxi white mud.
3. The composite aluminum silicon carbide tile of claim 1, wherein: 5 parts of brown corundum particles, 52 parts of homogenized material particles, 13 parts of homogenized material powder, 5 parts of alumina powder, 15 parts of silicon carbide powder and 10 parts of Guangxi white mud.
4. The composite aluminum silicon carbide tile of claim 1, wherein: 5 parts of brown corundum particles, 58 parts of chemical material particles, 18 parts of homogenized material powder, 16 parts of silicon carbide powder and 8 parts of Guangxi white mud.
5. A method of making the composite aluminum silicon carbide tile of any one of claims 1-4, wherein: the method mainly comprises the following process steps:
s1, mixing and stirring brown corundum, homogenized material, alumina powder, silicon carbide powder and water according to the proportion for 8-15 minutes;
s2: adding the white mud into S1, mixing and stirring for 8-15 minutes to form a blank for later use;
s3: the S2 blank is made into a blank with a fixed shape through a stamping die for later use;
s4: drying the blank in S3 at 110-140 deg.C for 6-10h to obtain semi-finished product
S5: the semi-finished product in S4 is fired for 10-15h at the high temperature of 1460-1500 ℃.
6. The method of making a composite aluminum silicon carbide tile according to claim 5, wherein: and in the step S4, the drying temperature is 130 ℃, and the drying is carried out for 8 hours.
7. The method for preparing the composite aluminum silicon carbide brick according to the claim 6, wherein: and in the step S5, the firing temperature is 1460 ℃, and the firing time is 12 hours.
8. The method for preparing the composite aluminum silicon carbide brick according to the claim 5, wherein: the white mud is Guangxi white mud.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544504A (en) * | 2009-05-08 | 2009-09-30 | 巩义市金岭耐火材料有限公司 | Phosphate-bonded aluminum silicon carbide brick and preparation method thereof |
| CN102936143A (en) * | 2012-12-07 | 2013-02-20 | 郑州凯翔耐火材料有限公司 | Composite thermal-shock-resisting high-aluminum refractory brick and preparation method thereof |
| CN103204691A (en) * | 2013-05-07 | 2013-07-17 | 郑州中本窑炉材料有限公司 | Low-heat conductance silicon corundum brick material and silicon corundum composite brick made of same |
| CN110105059A (en) * | 2019-05-17 | 2019-08-09 | 山东工业职业学院 | A kind of highly heatproof and shockproof, low creep hot-blast stove brick and its manufacturing method |
-
2020
- 2020-07-01 CN CN202010627668.4A patent/CN111662075A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544504A (en) * | 2009-05-08 | 2009-09-30 | 巩义市金岭耐火材料有限公司 | Phosphate-bonded aluminum silicon carbide brick and preparation method thereof |
| CN102936143A (en) * | 2012-12-07 | 2013-02-20 | 郑州凯翔耐火材料有限公司 | Composite thermal-shock-resisting high-aluminum refractory brick and preparation method thereof |
| CN103204691A (en) * | 2013-05-07 | 2013-07-17 | 郑州中本窑炉材料有限公司 | Low-heat conductance silicon corundum brick material and silicon corundum composite brick made of same |
| CN110105059A (en) * | 2019-05-17 | 2019-08-09 | 山东工业职业学院 | A kind of highly heatproof and shockproof, low creep hot-blast stove brick and its manufacturing method |
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| 《高炉砌筑》编写组: "《高炉砌筑》", 30 April 1977, 冶金工业出版社 * |
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Application publication date: 20200915 |