CN108083785B - Semi-light aluminum silicon carbide carbon brick and preparation method thereof - Google Patents
Semi-light aluminum silicon carbide carbon brick and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 37
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 35
- 239000011449 brick Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 43
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 238000000748 compression moulding Methods 0.000 claims abstract description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 13
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910001570 bauxite Inorganic materials 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 6
- 241001263300 Guarea grandifolia Species 0.000 abstract description 5
- 229910052593 corundum Inorganic materials 0.000 abstract description 5
- 239000011230 binding agent Substances 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 239000010431 corundum Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- 238000000498 ball milling Methods 0.000 description 8
- 239000002893 slag Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000007723 die pressing method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
-
- 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
- C04B2235/30—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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- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
-
- 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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
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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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
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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
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a semi-light aluminum silicon carbide carbon brick and a preparation method thereof, wherein the preparation method comprises the following steps: uniformly mixing 60-80 wt% of carapa alumina raw material, 5-15 wt% of graphite raw material, 5-20 wt% of premixed powder and 3-5 wt% of binding agent, then carrying out compression molding, and carrying out low-temperature baking to obtain the semi-light aluminum silicon carbide carbon brick. Compared with the common high-alumina bauxite, the carapa bauxite has the characteristics of less impurities, high purity, high apparent porosity and low density, can simultaneously replace the common high-alumina bauxite and corundum for use, and the semi-light aluminum silicon carbide carbon brick prepared from the light carapa bauxite has low density, good thermal shock stability, erosion resistance, effectively reduced thermal conductivity, energy conservation and consumption reduction, and has a certain reduction in cost compared with the common aluminum silicon carbide carbon brick.
Description
Technical Field
The invention relates to the field of refractory materials, in particular to a semi-light aluminum silicon carbide carbon brick and a preparation method thereof.
Background
At present, lining materials of molten iron containers used at home and abroad generally adopt aluminum silicon carbide carbon unburned bricks. Generally, the main raw materials of the aluminum silicon carbide carbon refractory material comprise corundum, super-grade alumina, high-purity graphite, silicon carbide and the like, the final sources of the raw materials are inorganic ore resources, the ore resources are basically non-renewable resources, particularly, alumina ore, most of the alumina used in China comes from Shanxi and Guizhou places and the like, the quality of the alumina raw ore which is good at present is reduced year by year or limited to be exploited for the refractory material, and the quality of the alumina which can be exploited for the refractory material is poorer and poorer, and the following problems mainly exist:
(1) the content of alumina is low, the impurity content is high, so that the common aluminum silicon carbide carbon brick used at present has poor high-temperature service performance, especially poor slag resistance;
(2) alumina with the alumina content of more than 85wt percent has high density of 3.2 to 3.5g/cm3The heat conductivity is good, which is not beneficial to energy conservation and consumption reduction in the using process of the common aluminum silicon carbide carbon brick;
meanwhile, due to the increasing environmental protection strength in recent years, the purchasing of alumina is more and more tense, and the price is continuously increased, so that the cost of the common aluminum silicon carbide carbon brick is greatly increased.
Disclosure of Invention
The semi-light aluminum silicon carbide carbon brick prepared by the method has the advantages of low density, good thermal shock stability, erosion resistance, effective reduction of thermal conductivity, energy conservation and consumption reduction, and the cost is reduced to a certain extent compared with the cost of the common aluminum silicon carbide carbon brick.
A semi-light aluminum silicon carbide carbon brick is prepared from the following raw materials:
the guiana alumina is a semi-light porous high-purity aluminum raw material; wherein the volume density of the semi-light aluminum silicon carbide carbon brick is 0.15-0.25 g/cm lower than that of the similar common aluminum silicon carbide carbon brick3。
The raw ore of the guyana alumina is produced from guyana, the main phase is gibbsite, the guyana alumina raw material used by the invention is alumina chamotte, the guyana alumina raw ore is burnt out from guyana alumina raw ore, has the characteristics different from common alumina, is directly called guyana alumina at present in China, and can be obtained by purchasing, for example, Saite corundum Co.
The invention also provides a preparation method of the semi-light aluminum silicon carbide carbon brick, which comprises the following steps:
(1) adding the silicon carbide fine powder, the metal aluminum powder and the ferrosilicon alloy powder into a ball mill in proportion, grinding and mixing for the first time, and discharging after 10-30 minutes to obtain premixed powder;
(2) and grinding the fine powder part in 60-80 wt% of the carapa alumina raw material and 5-20 wt% of the premixed powder in a ball mill for 10-20 minutes to obtain secondary grinding powder, uniformly mixing the rest carapa alumina aggregate, 5-15 wt% of the graphite raw material, the secondary grinding powder and 3-5 wt% of the binding agent in a wheel mill, then carrying out compression molding, and carrying out low-temperature baking to obtain the semi-light aluminum silicon carbide carbon brick.
The preparation method adopts a secondary ball milling process, wherein the primary ball milling aims at uniformly mixing the fine powder raw materials and increasing the activity of the fine powder raw materials, the matrix and the particles are more tightly combined in the using process, and the secondary ball milling aims at fully mixing the porous structure of the guyan alumina fine powder and the premixed powder with increased activity, even the premixed powder permeates into the pores of the guyan alumina fine powder, so that the compactness of the matrix part is increased, and the high-temperature strength and the slag penetration resistance of the product are improved.
Preferably, the first ball milling time is 10-20 minutes, and the second ball milling time is 10-15 minutes; (ii) a More preferably, the first ball milling time is 14-16 minutes, and the second ball milling time is 10-12 minutes.
Further preferably, the raw materials are as follows:
still more preferably, it is made from the following raw materials:
preferably, the particle size distribution of the guyana alumina raw material is:
further preferably, the particle size composition of the guyana alumina raw material is:
still more preferably, the particle size distribution of the guyana alumina feedstock is:
preferably, the premixed powder comprises the following components in percentage by weight:
60-65 wt% of silicon carbide fine powder;
15-20 wt% of metal aluminum powder;
15-20 wt% of ferrosilicon powder;
further preferably, the premixed powder comprises the following components in percentage by weight:
62-64 wt% of silicon carbide fine powder;
18-20 wt% of metal aluminum powder;
18-20 wt% of ferrosilicon powder;
the preparation method of the premixed powder comprises the following steps: adding the silicon carbide fine powder, the metal aluminum powder and the ferrosilicon alloy powder into a ball mill in proportion, grinding and mixing for 10-30 minutes, and discharging.
More preferably, the raw materials are as follows:
the corresponding guianea alumina feedstock had a particle size distribution of:
the corresponding premixed powder comprises the following components in percentage by weight:
62-64 wt% of silicon carbide fine powder;
18-20 wt% of metal aluminum powder;
18-20 wt% of ferrosilicon alloy powder.
Still more preferably, it is made from the following raw materials:
the corresponding guianea alumina feedstock had a particle size distribution of:
the corresponding premixed powder comprises the following components in percentage by weight:
62-64 wt% of silicon carbide fine powder;
18-20 wt% of metal aluminum powder;
18-20 wt% of ferrosilicon alloy powder.
Under the preferable combination ratio, the volume density of the prepared semi-light aluminum silicon carbide carbon brick is reduced by 0.15-0.18 g/cm compared with the common aluminum silicon carbide carbon bricks prepared in comparative example 1 and comparative example 23The slag resistance index is increased by about 10 percent, and the cost is more advantageous than that of a comparative ordinary aluminum silicon carbide carbon brick. When the semi-light aluminum silicon carbide carbon bricks prepared in the embodiments 1 and 2 are used in a foundry ladle, the temperature of a steel shell is reduced by 10-25 ℃ compared with that of a comparative example, and the service life is prolonged by about 30-50 furnaces.
Most preferably, it is made from the following raw materials:
the corresponding guianea alumina feedstock had a particle size distribution of:
the corresponding premixed powder comprises the following components in percentage by weight:
63.5-64 wt% of silicon carbide fine powder;
18-18.5 wt% of metal aluminum powder;
18-18.5 wt% of ferrosilicon alloy powder.
Further preferably, the grain diameter of the silicon carbide fine powder is less than or equal to 0.5 mm; still more preferably, the silicon carbide has a particle size of at least two of 0.5 to 0mm, -100 mesh, -0.088mm, -325 mesh.
The ferrosilicon alloy powder is used as a high-temperature antioxidant, has a good antioxidant effect, and is lower in price than other common antioxidants.
The binder used in the present invention may be selected from phenolic resin or phosphate commonly used in the field of refractory materials.
The guyana alumina has a porous structure, and the aggregate and the matrix, and the matrix can be tightly embedded, so that the normal temperature and high temperature strength, the erosion resistance and the slag permeability of the semi-light aluminum silicon carbide carbon brick are improved, and the service life of the product is prolonged; the porous structure can also improve the thermal shock resistance of the semi-light aluminum silicon carbide carbon brick, reduce the heat conductivity coefficient of the product and improve the comprehensive usability of the product.
The silicon carbide fine powder is compounded in different particle sizes, the wear resistance of the product can be improved by the aid of the coarser particle size, and the fine particle size can be used as an antioxidant to achieve a good antioxidant effect.
Preferably, the pressure of the die pressing is 50-90 MPa.
Preferably, the drying temperature is 180-200 ℃, and the drying time is 24-48 h.
Further preferably, the pressure of the die pressing is 80-90 MPa; the drying temperature is 180-200 ℃, and the drying time is 45-48 h; still more preferably, the pressure of the molding is 80 MPa; the drying temperature is 200 ℃, and the drying time is 48 h.
The guyana alumina introduced by the invention is a semi-light porous high-purity aluminum raw material, and Al in the raw material2O3The weight percentage of the sodium hydroxide is more than or equal to 90 percent, the content of impurities such as potassium oxide, sodium oxide and the like is low, and the volume density is 2.95-3.20 g/cm3。
Compared with the common high-alumina bauxite, the light-weight Guiana bauxite has the characteristics of less impurities, high purity, high apparent porosity and low density, can simultaneously replace the common high-alumina bauxite and corundum, and the semi-light-weight aluminum silicon carbide carbon brick prepared by adopting the light-weight Guiana bauxite and the corresponding preparation process has low density, good thermal shock stability, erosion resistance, effectively reduced thermal conductivity, energy conservation and consumption reduction, and the cost is reduced to a certain extent compared with the common aluminum silicon carbide carbon brick.
Detailed Description
The raw materials used in the following examples are commercially available, and the guayana alumina is available from Saite corundum Co., Ltd, Chongqing.
Examples 1 to 2 and comparative examples 1 to 2
The preparation method of the aluminum silicon carbide carbon brick in the embodiments 1 to 2 and the comparative examples 1 to 2 is as follows:
(1) preparing premixed powder: putting fine silicon carbide powder, metal aluminum powder and ferrosilicon alloy powder into a ball mill in sequence, and grinding for 15min to obtain premixed powder;
(2) preparing second grinding powder: mixing the premixed powder obtained in the step (1) with guyana alumina-0.088 mm fine powder, and performing ball milling for 10min to obtain secondary grinding powder;
(3) mixing particles with the particle size of 1-0 mm or more in all the raw materials for 1 min;
(4) mixing and stirring the mixture obtained in the step (3) with a binding agent for 6 min;
(5) mixing the mixture mixed with the phenolic resin in the step (4) with graphite and stirring for 8 min;
(6) mixing and stirring the mixture mixed with the graphite in the step (5), the premixed powder prepared in the step (1) and the secondary grinding powder obtained in the step (2) for 50 min;
and (4) forming the final product in the step (6) under 80MPa, and then drying for 48 hours at the temperature of 200 ℃ to obtain the semi-light aluminum silicon carbide carbon brick.
The compositions of the raw materials of examples 1 to 2 and comparative examples 1 to 2 in parts by weight are shown in Table 1.
TABLE 1
The physical and chemical properties and the parameters of the examples and comparative examples prepared by the above preparation method are shown in Table 2.
TABLE 2
| Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | |
| Bulk Density (g/cm)3) | 2.83 | 2.80 | 3.00 | 2.98 |
| Apparent porosity (%) | 8.7 | 9.3 | 7.5 | 8.2 |
| Slag resistance index | 100 | 95 | 110 | 103 |
| High and low cost index | Δ | ΔΔ | ΔΔΔ | ΔΔΔΔ |
| Steel shell temperature (. degree. C.) | 260 | 270 | 280 | 285 |
As can be seen from the results in Table 2, the semi-lightweight aluminum silicon carbide carbon bricks obtained in examples 1 and 2 have a reduced bulk density of 0.15 to 0.18g/cm compared to the conventional aluminum silicon carbide carbon bricks obtained in comparative examples 1 and 23The slag resistance index is increased by about 10 percent, and the cost is more advantageous than that of a comparative ordinary aluminum silicon carbide carbon brick. When the semi-light aluminum silicon carbide carbon bricks prepared in the embodiments 1 and 2 are used in a foundry ladle, the temperature of a steel shell is reduced by 10-25 ℃ compared with that of a comparative example, and the service life is prolonged by about 30-50 furnaces.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the relevant art can change or modify the present invention within the scope of the present invention.
Claims (3)
1. A preparation method of a semi-light aluminum silicon carbide carbon brick is characterized by comprising the following steps:
(1) adding the silicon carbide fine powder, the metal aluminum powder and the ferrosilicon alloy powder into a ball mill in proportion, grinding and mixing for the first time, and discharging after 10-30 minutes to obtain premixed powder;
the proportion of the silicon carbide fine powder, the metal aluminum powder and the ferrosilicon alloy powder is as follows:
60-65 wt% of silicon carbide fine powder;
15-20 wt% of metal aluminum powder;
15-20 wt% of ferrosilicon powder;
the particle size composition of the guyana alumina raw material is as follows:
5~3mm 10~15wt%；
3~1mm 40~55wt%；
1~0mm 20~30wt%；
-0.088mm 5~15wt%；
(2) grinding a fine powder part with the particle size of-0.088 mm in 60-80 wt% of the raw material of the guiana alumina and 5-20 wt% of the premixed powder in a ball mill for 10-20 minutes for the second time to obtain second grinding powder, uniformly mixing the rest of the guiana alumina aggregate, 5-15 wt% of the raw material of graphite, the second grinding powder and 3-5 wt% of a bonding agent in a wheel mill, then carrying out compression molding, and carrying out low-temperature baking to obtain the semi-light aluminum silicon carbide carbon brick.
2. The production method according to claim 1, wherein the molding pressure is 50 to 90 MPa.
3. The method according to claim 1, wherein the drying temperature is 180 to 200 ℃ and the drying time is 24 to 48 hours.
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| CN102757245A (en) * | 2012-07-17 | 2012-10-31 | 武汉钢铁(集团)公司 | Aluminum-silicon carbide brick added with silicon carbide-metallic silicon composite powder |
| CN103588493B (en) * | 2013-11-15 | 2014-12-10 | 浙江自立股份有限公司 | Preparation method for low-carbon aluminum-silicon-carbide carbon brick |
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