CN109279894B - Graphite drop tank and preparation method thereof - Google Patents
Graphite drop tank and preparation method thereof Download PDFInfo
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- CN109279894B CN109279894B CN201811212257.8A CN201811212257A CN109279894B CN 109279894 B CN109279894 B CN 109279894B CN 201811212257 A CN201811212257 A CN 201811212257A CN 109279894 B CN109279894 B CN 109279894B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000010439 graphite Substances 0.000 title claims abstract description 66
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 77
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000010426 asphalt Substances 0.000 claims abstract description 26
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 19
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 7
- 239000010431 corundum Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 43
- 238000003756 stirring Methods 0.000 claims description 42
- 239000003921 oil Substances 0.000 claims description 31
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000009969 flowable effect Effects 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 32
- 229910052742 iron Inorganic materials 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 238000005058 metal casting Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 235000021190 leftovers Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 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
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
-
- 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
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/524—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from polymer precursors, e.g. glass-like carbon material
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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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
- C04B2235/38—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
- C04B2235/65—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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Powder Metallurgy (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a graphite drop tank and a preparation method thereof, wherein the graphite drop tank is prepared by mixing wet materials and powder materials, wherein the wet materials are modified asphalt; the powder comprises the following components in parts by weight: 50-60 parts of graphite powder, 8-12 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-20 parts of silicon carbide; the ratio of the wet material to the powder material is 100: 20-30. The graphite drop groove prepared by adopting the components with special proportions and the specific production process has the characteristics of smooth surface, no molten iron sticking, long service life, no environmental pollution in the production process and high production efficiency.
Description
Technical Field
The invention relates to the technical field of molten iron pouring systems, in particular to a graphite drop groove for guiding molten iron and a preparation method thereof.
Background
In the field of metal casting, casting is performed by pouring molten metal earth or the like into a mold to cast a metal member. The existing molten iron pouring processing is that molten iron after high-temperature treatment is poured into a ladle through a drop groove, and then is manually carried to a corresponding pouring station for pouring operation, wherein the used drop groove is generally a graphite drop groove.
Most of the graphite drop grooves are of arc-shaped structures with U-shaped sections; the material is graphite, and the graphite electrode is mainly prepared by manually sawing, punching, threading a steel wire, butting 5-6 blocks, bonding and polishing the graphite electrode produced by a carbon factory. The graphite drop groove prepared by the traditional process has the following defects: 1) the graphite electrode sawed by hand has uneven and convex surface, cannot ensure geometric precision, has obvious butt joint stub, and causes different sizes and rough surface of graphite products; 2) the structure is loose, the strength is low, the high-temperature molten iron impact resistance is poor, the service life is generally 20 hours, the service life is short, and the replacement is frequent; 3) because of adopting the gluing process, the product has larger glue smell, which causes air pollution of the production environment; 4) after the bonding is finished, the graphite drop groove brick needs to be trimmed for use, the average time for producing one graphite drop groove is about 2 hours, and the efficiency is low; 5) because of the self-limit of graphite materials, the graphite drop groove can not be produced mechanically; 6) the graphite falling-groove brick can cause serious graphite dust pollution to a production site in the production process, cannot be cleaned and stopped, and has obvious pollution to the environment in transportation, storage, use and after-treatment. In addition, the existing graphite dropping groove has a fatal problem that in the process of guiding molten iron, an obvious molten iron adhesion phenomenon occurs, namely, in the process of guiding the molten iron by the graphite dropping groove, part of the molten iron adheres to the bottom end surface of the graphite dropping groove, and the molten iron is wasted.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the graphite drop tank without sticking water and the preparation method thereof, so that the product percent of pass and the service life of the graphite drop tank are improved on the basis of ensuring that the graphite drop tank does not stick molten iron in the using process.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A graphite drop tank is prepared by mixing wet materials and powder materials, wherein the wet materials are modified asphalt; the powder comprises the following components in parts by weight: 50-60 parts of graphite powder, 8-12 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-20 parts of silicon carbide; the ratio of the wet material to the powder material is 100: 20-30.
The graphite drop tank is prepared by mixing wet materials and powder materials, wherein the wet materials are modified asphalt; the powder comprises the following components in parts by weight: 55-60 parts of graphite powder, 8-10 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-15 parts of silicon carbide; the ratio of the wet material to the powder material is 100: 20-25.
Preferably, the graphite drop tank is prepared by mixing wet materials and powder materials, wherein the wet materials are modified asphalt; the powder comprises the following components in parts by weight: 60 parts of graphite powder, 10 parts of bauxite, 10 parts of natural flake graphite powder, 5 parts of brown fused alumina and 15 parts of silicon carbide; the ratio of the wet material to the powder material is 100: 25.
According to the graphite drop tank, the granularity of graphite powder is 0-3 meshes, the granularity of bauxite is 80-100 meshes, the granularity of natural crystalline flake graphite powder is 100-120 meshes, the granularity of brown fused alumina is 50-60 meshes, and the granularity of silicon carbide is 50-60 meshes.
A preparation method of a graphite drop tank specifically comprises the following steps:
A. preparing powder materials according to the parts by weight, and uniformly stirring for later use;
B. heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into a flowable liquid wet material;
C. b, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and preserving heat for 180 ℃ to form a mixture;
D. leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank;
E. putting the blanking groove blank into cold water for rapid cooling for 30min, and then cutting rough edges;
F. feeding the cut blanking groove blank into a roasting furnace for roasting at 680-700 ℃ for 6 h;
G. and naturally cooling the roasted blank of the falling groove to prepare the graphite falling groove.
In the preparation method of the graphite drop tank, the heating furnace used in the step B is a methanol heating furnace or a natural gas heating furnace.
In the preparation method of the graphite drop tank, the stirring pot used in the step C is a double-layer heat preservation chamber heating pot, and the interlayer is filled with heat conduction oil.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The graphite drop groove prepared by adopting the components with special proportions and the specific production process has the characteristics of smooth surface, no molten iron adhesion and long service life. The method for preparing the graphite drop groove realizes the mechanical batch production requirement of the graphite drop groove, has no pollution to the environment in the production process, meets the requirements of environmental protection and energy conservation, has the time of producing one graphite drop groove about 20 minutes by adopting the method for preparing the graphite drop groove, and greatly improves the production efficiency.
Detailed Description
A graphite drop tank is used for guiding molten iron in the field of metal casting. The graphite drop tank is prepared by mixing wet materials and powder materials: the wet material is modified asphalt; the powder comprises the following components in parts by weight: 50-60 parts of graphite powder, 8-12 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-20 parts of silicon carbide; the ratio of the wet material to the powder material is 100: 20-30. The particle size of the graphite powder is 0-3 meshes, the particle size of the bauxite is 80-100 meshes, the particle size of the natural crystalline flake graphite powder is 100-120 meshes, the particle size of the brown fused alumina is 50-60 meshes, and the particle size of the silicon carbide is 50-60 meshes.
The graphite powder can be obtained by grinding dust waste collected in the process of producing the graphite electrode in a carbon plant and leftovers generated in the production process, so that the production cost is reduced, and the waste is utilized.
The preparation method of the graphite drop tank specifically comprises the following steps.
A. Preparing powder materials according to the parts by weight, and uniformly stirring for later use.
B. Heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into flowable liquid wet material. The heating furnace is a methanol heating furnace or a natural gas heating furnace.
C. And D, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and keeping the temperature at 180 ℃ to form a mixture. The stirring pot is a double-layer heat preservation chamber heating pot, the interlayer is filled with heat conduction oil, and the heat conduction oil can be heat conduction oil heated by a heating furnace.
D. And (4) leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank.
E. And (4) putting the groove blank into cold water for rapid cooling for 30min, and then cutting rough edges.
F. And (3) feeding the cut blanking groove blank into a roasting furnace for roasting at 680-700 ℃ for 6 h.
G. And naturally cooling the roasted product to obtain the graphite drop tank.
The present invention will be described in further detail with reference to specific examples.
Example 1
A graphite drop tank is prepared by mixing wet materials and powder materials: the wet material is modified asphalt; the powder comprises the following components in parts by weight: 60 parts of graphite powder, 10 parts of bauxite, 10 parts of natural flake graphite powder, 5 parts of brown fused alumina and 15 parts of silicon carbide; the ratio of wet material to powder was 100: 25. Wherein the granularity of the graphite powder is 3 meshes, the granularity of the bauxite is 80 meshes, the granularity of the natural crystalline flake graphite powder is 100 meshes, the granularity of the brown fused alumina is 50 meshes, and the granularity of the silicon carbide is 50 meshes.
The graphite drop groove in this example was prepared by the following procedure.
A. Preparing powder materials according to the parts by weight, and uniformly stirring for later use.
B. Heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into flowable liquid wet material. The heating furnace is a methanol heating furnace, and cannot pollute the environment.
C. And D, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and keeping the temperature at 180 ℃ to form a mixture. The stirring pot is a double-layer heat preservation chamber heating pot, the interlayer is filled with heat conduction oil, and the heat conduction oil can be heat conduction oil heated by a heating furnace.
D. And (4) leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank.
E. And (4) putting the groove blank into cold water for rapid cooling for 30min, and then cutting rough edges.
F. And (3) feeding the cut blanking groove blank into a roasting furnace for roasting at the roasting temperature of 680 ℃ for 6 hours.
G. And naturally cooling the roasted product to obtain the graphite drop tank.
The graphite drop groove prepared by the embodiment has smooth surface and no stubble, is used for guiding molten iron, does not have the condition that the molten iron is adhered to the bottom end surface, can be used for 32 hours, reduces the production cost of a metal casting manufacturer, and simultaneously improves the production efficiency of the metal casting manufacturer.
Example 2
A graphite drop tank is prepared by mixing wet materials and powder materials: the wet material is modified asphalt; the powder comprises the following components in parts by weight: 50 parts of graphite powder, 12 parts of bauxite, 10 parts of natural flake graphite powder, 8 parts of brown fused alumina and 20 parts of silicon carbide; the ratio of wet material to powder was 100: 25. Wherein the granularity of the graphite powder is 0 mesh, the granularity of the bauxite is 100 mesh, the granularity of the natural crystalline flake graphite powder is 120 mesh, the granularity of the brown fused alumina is 60 mesh, and the granularity of the silicon carbide is 60 mesh.
The graphite drop groove in this example was prepared by the following procedure.
A. Preparing powder materials according to the parts by weight, and uniformly stirring for later use.
B. Heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into flowable liquid wet material. The heating furnace is a methanol heating furnace, and cannot pollute the environment.
C. And D, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and keeping the temperature at 180 ℃ to form a mixture. The stirring pot is a double-layer heat preservation chamber heating pot, the interlayer is filled with heat conduction oil, and the heat conduction oil can be heat conduction oil heated by a heating furnace.
D. And (4) leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank.
E. And (4) putting the groove blank into cold water for rapid cooling for 30min, and then cutting rough edges.
F. And (3) feeding the cut blanking groove blank into a roasting furnace for roasting at the roasting temperature of 700 ℃ for 6 hours.
G. And naturally cooling the roasted product to obtain the graphite drop tank.
Example 3
A graphite drop tank is prepared by mixing wet materials and powder materials: the wet material is modified asphalt; the powder comprises the following components in parts by weight: 55 parts of graphite powder, 8 parts of bauxite, 10 parts of natural flake graphite powder, 7 parts of brown fused alumina and 20 parts of silicon carbide; the ratio of wet material to powder was 100: 25. Wherein the granularity of the graphite powder is 3 meshes, the granularity of the bauxite is 80 meshes, the granularity of the natural crystalline flake graphite powder is 100 meshes, the granularity of the brown fused alumina is 50 meshes, and the granularity of the silicon carbide is 50 meshes.
The graphite drop groove in this example was prepared by the following procedure.
A. Preparing powder materials according to the parts by weight, and uniformly stirring for later use.
B. Heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into flowable liquid wet material. The heating furnace is a methanol heating furnace, and cannot pollute the environment.
C. And D, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and keeping the temperature at 180 ℃ to form a mixture. The stirring pot is a double-layer heat preservation chamber heating pot, the interlayer is filled with heat conduction oil, and the heat conduction oil can be heat conduction oil heated by a heating furnace.
D. And (4) leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank.
E. And (4) putting the groove blank into cold water for rapid cooling for 30min, and then cutting rough edges.
F. And (3) feeding the cut blanking groove blank into a roasting furnace for roasting at the roasting temperature of 680 ℃ for 6 hours.
G. And naturally cooling the fired product to obtain the graphite drop tank.
Example 4
A graphite drop tank is prepared by mixing wet materials and powder materials: the wet material is modified asphalt; the powder comprises the following components in parts by weight: 60 parts of graphite powder, 12 parts of bauxite, 10 parts of natural flake graphite powder, 8 parts of brown fused alumina and 10 parts of silicon carbide; the ratio of wet material to powder was 100: 25. Wherein the granularity of the graphite powder is 3 meshes, the granularity of the bauxite is 80 meshes, the granularity of the natural crystalline flake graphite powder is 100 meshes, the granularity of the brown fused alumina is 50 meshes, and the granularity of the silicon carbide is 50 meshes.
The graphite drop groove in this example was prepared by the following procedure.
A. Preparing powder materials according to the parts by weight, and uniformly stirring for later use.
B. Heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into flowable liquid wet material. The heating furnace is a methanol heating furnace, and cannot pollute the environment.
C. And D, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and keeping the temperature at 180 ℃ to form a mixture. The stirring pot is a double-layer heat preservation chamber heating pot, the interlayer is filled with heat conduction oil, and the heat conduction oil can be heat conduction oil heated by a heating furnace.
D. And (4) leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank.
E. And (4) putting the groove blank into cold water for rapid cooling for 30min, and then cutting rough edges.
F. And (3) feeding the cut blanking groove blank into a roasting furnace for roasting at the roasting temperature of 690 ℃ for 6 hours.
G. And naturally cooling after roasting to obtain the graphite drop tank.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The graphite drop tank is characterized by being prepared by mixing wet materials and powder materials, wherein the wet materials are modified asphalt; the powder comprises the following components in parts by weight: 50-60 parts of graphite powder, 8-12 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-20 parts of silicon carbide;
the ratio of the wet material to the powder is 100: 20-30;
the preparation method of the graphite drop groove specifically comprises the following steps:
A. preparing powder materials according to the parts by weight, and uniformly stirring for later use;
B. heating hot oil in a heating furnace to 180 ℃, conveying the hot oil to a charging bucket filled with blocky asphalt, and softening the asphalt into a flowable liquid wet material;
C. b, adding the powder prepared in the step A into a stirring pot, conveying wet materials into the stirring pot according to a ratio, stirring for 2 hours, and preserving heat for 180 ℃ to form a mixture;
D. leading out the mixture from the stirring pot, conveying the mixture to a falling groove die, and performing hydraulic forming to obtain a falling groove blank;
E. putting the blanking groove blank into cold water for rapid cooling for 30min, and then cutting rough edges;
F. feeding the cut blanking groove blank into a roasting furnace for roasting at 680-700 ℃ for 6 h;
G. and naturally cooling the roasted blank of the falling groove to prepare the graphite falling groove.
2. The graphite drop tank of claim 1, wherein the graphite drop tank is made by mixing a wet material and a powder material, wherein the wet material is modified asphalt; the powder comprises the following components in parts by weight: 55-60 parts of graphite powder, 8-10 parts of bauxite, 10 parts of natural flake graphite powder, 5-8 parts of brown corundum and 10-15 parts of silicon carbide;
the ratio of the wet material to the powder material is 100: 20-25.
3. The graphite drop tank of claim 1, wherein the graphite drop tank is made by mixing a wet material and a powder material, wherein the wet material is modified asphalt; the powder comprises the following components in parts by weight: 60 parts of graphite powder, 10 parts of bauxite, 10 parts of natural flake graphite powder, 5 parts of brown fused alumina and 15 parts of silicon carbide;
the ratio of the wet material to the powder material is 100: 25.
4. The graphite drop tank of claim 1, wherein the graphite powder has a particle size of 0-3 mesh, the bauxite has a particle size of 80-100 mesh, the natural flake graphite powder has a particle size of 100-120 mesh, the brown corundum has a particle size of 50-60 mesh, and the silicon carbide has a particle size of 50-60 mesh.
5. The method for preparing a graphite drop tank according to claim 1, wherein the heating furnace used in the step B is a methanol heating furnace or a natural gas heating furnace.
6. The method for preparing a graphite drop tank according to claim 1, wherein the stirring pot used in the step C is a double-layer heat preservation chamber heating pot, and the interlayer is filled with heat conducting oil.
Priority Applications (1)
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| CN113087528A (en) * | 2021-04-09 | 2021-07-09 | 郑州市瑞沃耐火材料有限公司 | Slag sticking prevention agent for foundry ladle and use method thereof |
| CN113816741A (en) * | 2021-09-18 | 2021-12-21 | 邯郸市高精新材料科技有限公司 | High-strength graphite product, preparation method and application |
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| CN1827555A (en) * | 2005-02-28 | 2006-09-06 | 宝山钢铁股份有限公司 | Non-oxide composite refractory materials for molten iron chute |
| CN101205140A (en) * | 2006-12-23 | 2008-06-25 | 周成德 | High-carbon refractory and method for preparing same |
| CN102617176A (en) * | 2012-04-17 | 2012-08-01 | 磐石市昌隆冶金材料有限公司 | Graphite silicon carbon brick |
| CN103130507A (en) * | 2012-11-13 | 2013-06-05 | 宁夏银星多晶硅有限责任公司 | Preparation method of antioxidant carbon block with heat and alkaline etching resistance |
| CN106699199A (en) * | 2016-12-12 | 2017-05-24 | 河北互兴环保科技股份有限公司 | Falling chute brick and production process of falling chute brick |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827555A (en) * | 2005-02-28 | 2006-09-06 | 宝山钢铁股份有限公司 | Non-oxide composite refractory materials for molten iron chute |
| CN101205140A (en) * | 2006-12-23 | 2008-06-25 | 周成德 | High-carbon refractory and method for preparing same |
| CN102617176A (en) * | 2012-04-17 | 2012-08-01 | 磐石市昌隆冶金材料有限公司 | Graphite silicon carbon brick |
| CN103130507A (en) * | 2012-11-13 | 2013-06-05 | 宁夏银星多晶硅有限责任公司 | Preparation method of antioxidant carbon block with heat and alkaline etching resistance |
| CN106699199A (en) * | 2016-12-12 | 2017-05-24 | 河北互兴环保科技股份有限公司 | Falling chute brick and production process of falling chute brick |
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