CN113606941A - Brick crucible for vacuum induction furnace and preparation method thereof - Google Patents
Brick crucible for vacuum induction furnace and preparation method thereof Download PDFInfo
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- CN113606941A CN113606941A CN202110900832.9A CN202110900832A CN113606941A CN 113606941 A CN113606941 A CN 113606941A CN 202110900832 A CN202110900832 A CN 202110900832A CN 113606941 A CN113606941 A CN 113606941A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/025—Hot pressing, e.g. of ceramic materials
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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
- C04B35/44—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 aluminates
- C04B35/443—Magnesium aluminate spinel
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
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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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/70—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
-
- 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
- C04B2235/70—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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The invention belongs to the technical field of vacuum smelting, and particularly relates to a bricked crucible for a vacuum induction furnace and a preparation method thereof. The invention relates to a preparation method of a bricked crucible for a vacuum induction furnace, which comprises the steps of preparing refractory bricks, building the bricked crucible and baking the bricked crucible, wherein two layers of refractory bricks are built in a staggered joint in the vacuum induction furnace to form the bottom of the crucible, the middle part of an annular crucible above the crucible and the upper part of the crucible when the bricked crucible is built, and baking is carried out after the building is finished to obtain a finished product of the bricked crucible; the refractory brick is made of magnesia-alumina spinel and comprises the following components in percentage by massThe components are as follows: MgO: 90% -92% of Al2O3：8%~9%、SiO2≤0.5%、CaO≤0.5%，Fe2O3Less than or equal to 0.5 percent. Compared with the traditional knotted crucible, the bricked crucible for the vacuum induction furnace has the advantages that the strength is greatly improved, the cleanliness of the high-temperature alloy smelted by the bricked crucible is higher, and the quality of the high-temperature alloy is effectively improved.
Description
Technical Field
The invention belongs to the technical field of vacuum smelting, and particularly relates to a bricked crucible for a vacuum induction furnace and a preparation method thereof.
Background
Vacuum induction melting is a melting method in which eddy current is generated in a metal material by electromagnetic induction to melt the metal. The vacuum environment of the vacuum induction furnace is beneficial to removing nitrogen, hydrogen, oxygen and five harmful elements in steel and alloy, and the yield of active elements such as aluminum, titanium, boron, zirconium and the like in the alloy to be controlled is stable. Therefore, the metal material smelted by vacuum induction can obviously improve various performances such as toughness, fatigue strength, corrosion resistance, high-temperature creep property, magnetic permeability of the magnetic alloy and the like.
In the vacuum induction smelting process, the quality of the prepared crucible has important influence on the safety of the smelting process and the quality of molten steel. The crucible is direct to contact with the molten steel, can erode the crucible inner wall under high temperature environment, and when the crucible was traditional crucible of knoing, the intensity of crucible was not high, can have some refractory material to enter into the molten steel, pollutes the molten steel, increases the inclusion in the molten steel. When the crucible is eroded to a certain extent, a part of the molten steel remains in the eroded portion after casting, thereby affecting the composition of the next furnace. Erosion of the crucible can also cause steel infiltration, causing safety hazards.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a preparation method of a bricked crucible for a vacuum induction furnace. The bricked crucible for the vacuum induction furnace is built by adopting the refractory bricks, and the refractory bricks are high in strength, so that the bricked crucible is relatively resistant to scouring and hot corrosion, not only can the cleanliness of molten steel be improved, but also the safety of a smelting process can be improved, and the quality of high-temperature alloy can be improved.
In order to achieve the technical purpose, the embodiment of the invention adopts the technical scheme that:
in a first aspect, the embodiment of the invention provides a method for preparing a bricked crucible for a vacuum induction furnace, which comprises the steps of preparing refractory bricks, building the bricked crucible and baking the bricked crucible, wherein two layers of refractory bricks are built in a staggered joint in the vacuum induction furnace during building the bricked crucible to form the bottom of the crucible, the middle part of an annular crucible above the crucible and the upper part of the crucible, and baking is carried out after building is finished to obtain a finished product of the bricked crucible;
the refractory brick is made of magnesium aluminate spinel, and comprises the following components in parts by mass: MgO: 90 to 92 percent of Al2O3：8％～9％、SiO2≤0.5％、CaO≤0.5％，Fe2O3≤0.5％。
Further, the baking process of the bricked crucible is as follows: heating to 350 + -10 deg.C within 210 + -5 min, maintaining the temperature for 120 + -5 min, heating to 450 + -10 deg.C within 60 + -5 min, maintaining the temperature for 120 + -5 min, heating to 550 + -10 deg.C within 60 + -5 min, maintaining the temperature for 120 + -5 min, heating to 650 + -10 deg.C within 60 + -5 min, and maintaining the temperature for 18h + -5 min.
Further, the preparation method of the refractory brick comprises the following steps: grinding the raw materials in a grinder according to a required proportion until the particle size of the powder is less than 3 mu m, and putting the powder in a required sizing die for hot press molding to obtain the refractory brick.
Furthermore, the refractory bricks comprise rectangular refractory bricks and arc-shaped refractory bricks, the arc-shaped refractory bricks comprise inner-layer arc-shaped refractory bricks and outer-layer arc-shaped refractory bricks, and the size of the inner-layer arc-shaped refractory bricks is smaller than that of the outer-layer arc-shaped refractory bricks.
Further, the hot-press forming temperature is 1200-1250 ℃, the pressure is 30-40 MPa, and the time is 4-5 h; the size tolerance of the refractory brick obtained by hot press molding is less than or equal to 0.1 mm.
Further, the crucible bottom is the upper and lower two-layer rectangle resistant firebrick that the staggered joint built by laying bricks, the crucible middle part is inlayer arc resistant firebrick and outer arc resistant firebrick that the staggered joint built by laying bricks, the laminating pouring basin upper portion is built and is equipped with inlayer arc resistant firebrick and outer arc resistant firebrick that the staggered joint built by laying bricks.
Furthermore, adjacent refractory bricks on the same layer at the bottom of the crucible are jointed by refractory mortar, rectangular refractory bricks between layers are in direct contact, and a gap between the rectangular refractory bricks and a vacuum induction furnace lining is filled with ramming materials; the thickness of the refractory mortar is 0.6-0.8 mm.
Furthermore, the arc-shaped refractory bricks in the middle of the crucible comprise two radial layers, and adjacent refractory bricks are in direct contact without being jointed by refractory mortar.
Furthermore, a pouring nozzle is arranged on the upper portion of the crucible, and the pouring nozzle is built into the pouring steel groove.
In a second aspect, the embodiment of the invention provides a bricked crucible for a vacuum induction furnace, which is prepared by adopting the preparation method.
Compared with the prior art, the brick crucible has the advantages that:
(1) the brick crucible is built by specially-made refractory bricks, the manufacturing process of the used refractory bricks is strict, the size deviation of the refractory bricks is small, the strength is high, and particularly, the arc refractory bricks are tightly attached, so that the brick crucible has higher strength and stronger scouring resistance compared with the traditional manufactured crucible, the purity of the smelted molten steel is higher, and the components are more accurate.
(2) The brick crucible provided by the invention adopts the specially-made refractory bricks, the arc-shaped refractory bricks are more tightly connected with the crucible wall and the bricks, gaps are reduced, a double-layer staggered joint building process is adopted, the steel infiltration possibility is reduced, and the safety of the smelting process is improved.
(3) Compared with the traditional knotted crucible, the brick crucible disclosed by the invention is resistant to scouring and corrosion, the service life of the crucible can be greatly prolonged, the production cost is reduced, and the economic benefit is improved.
(4) The baking process of the bricked crucible is in a multi-stage step type, after the temperature is uniformly raised, the baking process is kept for a period of time, so that moisture in the crucible can be fully removed, the temperature rise amplitude cannot be too fast, the refractory bricks cannot crack, and the stability of the bricked crucible is guaranteed.
Drawings
Fig. 1 is a schematic view of a baking process of a bricked crucible in example 1 of the present invention.
FIG. 2 is a schematic structural view of three types of special refractory bricks according to the present invention.
FIG. 3 is a schematic diagram of the laying structure of the first layer of refractory bricks at the bottom of the crucible according to the invention.
FIG. 4 is a schematic diagram of the laying structure of the second layer of refractory bricks at the bottom of the crucible.
FIG. 5 is a structural schematic diagram of staggered masonry of a first layer and a second layer of refractory bricks at the bottom of the laying structure.
FIG. 6 is a structural schematic diagram of the middle staggered joint masonry of the laying structure of the invention.
FIG. 7 is an overall sectional view of the bricked crucible of the present invention.
Description of reference numerals: 1-rectangular refractory bricks; 2-inner layer arc firebricks; 3-outer arc firebricks; 4-the bottom of the crucible; 5-the middle part of the crucible; 6-crucible top.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of a bricked crucible for a 10-ton vacuum induction furnace comprises the following steps:
firstly, two kinds of refractory bricks are manufactured, then the manufactured refractory bricks are used for building a crucible, finally, the crucible is baked by adopting a specific baking process, and finally, the brick crucible for the 10-ton vacuum induction furnace is prepared.
Specifically, first, a firebrick is produced: mixing bauxite (8.5 wt.%), light-burned magnesium powder (magnesium powder)91.5 percent) is put into a grinding machine according to the proportion to be ground, the grain diameter of the ground powder is less than 3 mu m, the powder is put into three sizing dies and kept for 4.4 hours at the temperature of 1225 ℃ and the pressure of 37MPa, and hot-press forming is carried out, so that rectangular refractory bricks, inner-layer arc refractory bricks and outer-layer arc refractory bricks with the dimensional tolerance of less than or equal to 0.1mm are obtained, and the prepared refractory bricks comprise the following components: MgO: 90% -92%; al (Al)2O3：8％～9％；SiO2：≤0.5％；CaO：≤0.5％；Fe2O3：≤0.5％。
The obtained refractory bricks were subjected to tests for the relevant parameters, the relevant performance parameters being shown in table 1:
TABLE 1 relevant Performance parameters for refractory bricks obtained in example 1
The brick crucible is divided into three layers. Firstly, a layer of rectangular bricks is paved at the bottom inside the vacuum induction furnace, refractory bricks on the same layer are jointed by adopting refractory mortar, and the gap between adjacent bricks is ensured to be 0.6-0.8mm, so that the gap between the bricks is not too large, steel leakage is prevented, and the part which is not covered by the bricks in the crucible is filled by using a ramming mass. A second layer of rectangular refractory bricks is built above the first layer of bricks by the same method, the direction of the second layer of rectangular refractory bricks is anticlockwise rotated by 55 degrees along the direction of the first layer of rectangular refractory bricks, brick joints are staggered to prevent steel leakage, and the rectangular refractory bricks between layers are in direct contact;
two layers of arc-shaped refractory bricks are adopted in the middle and the upper part of the crucible, the inner layer refractory bricks are small, the outer layer refractory bricks are large, staggered joints between the outer layer adjacent refractory bricks are built, staggered joints between the inner layer adjacent refractory bricks are built, staggered joints between the outer layer refractory bricks and the inner layer refractory bricks are also built, refractory clay is not used for jointing between the arc-shaped refractory bricks, and a pouring nozzle is arranged at a reserved position on the upper part of the crucible.
The bricked crucible was baked using the baking process shown in fig. 1.
Example 2
A preparation method of a bricked crucible for a 10-ton vacuum induction furnace comprises the following steps:
firstly, two kinds of refractory bricks are manufactured, then the manufactured refractory bricks are used for building a crucible, finally, the crucible is baked by adopting a specific baking process, and finally, the brick crucible for the 10-ton vacuum induction furnace is prepared.
Specifically, first, a firebrick is produced: putting bauxite (with the mass fraction of 8%) and light-burned magnesia powder (with the mass fraction of 92%) into a grinding machine according to a proportion, grinding the powder to the particle size of less than 3 mu m, putting the powder into three sizing dies, keeping the powder for 4.8h at the temperature of 1240 ℃ and under the pressure of 33MPa, and performing hot press molding to obtain rectangular refractory bricks, inner-layer arc refractory bricks and outer-layer arc refractory bricks with the dimensional tolerance of less than or equal to 0.1mm, wherein the prepared refractory bricks comprise the following components: MgO: 90% -92%; al (Al)2O3：8％～9％；SiO2：≤0.5％；CaO：≤0.5％；Fe2O3：≤0.5％。
The obtained refractory bricks were subjected to tests for the relevant parameters, the relevant performance parameters being shown in table 1:
TABLE 1 relevant Performance parameters for refractory bricks obtained in example 1
The brick crucible is divided into three layers. Firstly, a layer of rectangular bricks is paved at the bottom inside the vacuum induction furnace, refractory bricks on the same layer are jointed by adopting refractory mortar, and the gap between adjacent bricks is ensured to be 0.6-0.8mm, so that the gap between the bricks is not too large, steel leakage is prevented, and the part which is not covered by the bricks in the crucible is filled by using a ramming mass. A second layer of rectangular refractory bricks is built above the first layer of rectangular refractory bricks by the same method, the direction of the second layer of rectangular refractory bricks is anticlockwise rotated by 58 degrees along the direction of the first layer of rectangular refractory bricks, brick joints are staggered to prevent steel leakage, and the rectangular refractory bricks between layers are in direct contact;
two layers of arc-shaped refractory bricks are built in the middle and the upper part of the crucible, the inner layer of refractory bricks is small, and the outer layer of refractory bricks is large. Staggered joints between adjacent outer refractory bricks are built, staggered joints between adjacent inner refractory bricks are built, staggered joints between the outer refractory bricks and the inner refractory bricks are also built, refractory mortar is not used for jointing between the arc refractory bricks, and a pouring nozzle is arranged at a reserved position on the upper part of the crucible.
The bricked crucible was baked using the baking process shown in fig. 1.
Comparative example 1
Manufacturing an iron sheet mold with a corresponding size in advance, filling a layer of ramming material at the bottom of a crucible, compacting, then putting the iron sheet mold in the middle of the crucible; filling the gap between the iron sheet mould and the crucible with a ramming material, ramming once every 200mm of height until the ramming material is flush with the iron sheet mould, and installing a pouring nozzle. The fired crucible was also fired using the firing process shown in fig. 1.
The final life of the bricked crucible of example 1 was 44 furnaces, and the final life of the fabricated crucible of comparative example 1 was 30 furnaces, and thus it was found that the lifetime of the bricked crucible of the present invention was much longer than that of the conventional fabricated crucible, and the dross cases of the different heats were as shown in table 1.
TABLE 1 comparison of dross areas of different heats of crucibles obtained in example 1 and comparative example 1
| EXAMPLE 1 Heat number | Area fraction of dross/%) | Comparative example 1 Heat number | Area fraction of dross/%) |
| 1 | 5 | 1 | 10 |
| 5 | 7 | 5 | 15 |
| 10 | 9 | 10 | 19 |
| 15 | 13 | 15 | 25 |
| 20 | 10 | 20 | 30 |
| 25 | 7 | 25 | 35 |
| 30 | 6 | 30 | 50 |
| 35 | 6 | ||
| 40 | 8 | ||
| 44 | 11 |
As can be seen from the change situation of the scum in the table 1, the scum area of the bricked crucible is integrally superior to that of the traditional manufactured crucible, and the purity of the smelting molten steel can be improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for preparing a bricked crucible for a vacuum induction furnace is characterized by comprising the steps of preparing refractory bricks, building the bricked crucible and baking the bricked crucible, wherein two layers of refractory bricks are built in a staggered joint in the vacuum induction furnace to form a crucible bottom (4), an annular crucible middle part (5) and an annular crucible upper part (6) which are positioned above the crucible bottom, and baking is carried out after the building is finished to obtain a finished bricked crucible;
the refractory brick is made of magnesium aluminate spinel, and comprises the following components in parts by mass: MgO: 90% -92% of Al2O3：8%~9%、SiO2≤0.5%、CaO≤0.5%，Fe2O3≤0.5%。
2. The method for preparing the bricked crucible for the vacuum induction furnace according to claim 1, wherein the baking process of the bricked crucible is as follows: heating to 350 + -10 deg.C within 210 + -5 min, maintaining the temperature for 120 + -5 min, heating to 450 + -10 deg.C within 60 + -5 min, maintaining the temperature for 120 + -5 min, heating to 550 + -10 deg.C within 60 + -5 min, maintaining the temperature for 120 + -5 min, heating to 650 + -10 deg.C within 60 + -5 min, and maintaining the temperature for 18h + -5 min.
3. The method for manufacturing a bricked crucible for a vacuum induction furnace according to claim 1, wherein the method for manufacturing the refractory brick comprises the steps of: grinding the raw materials in a grinder according to a required proportion until the particle size of the powder is less than 3 mu m, and putting the powder in a required sizing die for hot press molding to obtain the refractory brick.
4. The method for manufacturing a bricked crucible for a vacuum induction furnace according to claim 1, wherein the refractory bricks comprise rectangular refractory bricks (1) and arc-shaped refractory bricks, the arc-shaped refractory bricks comprise inner arc-shaped refractory bricks (2) and outer arc-shaped refractory bricks (3), and the inner arc-shaped refractory bricks (2) are smaller in size than the outer arc-shaped refractory bricks (3).
5. The method for preparing the bricked crucible for the vacuum induction furnace according to claim 3, wherein the hot press forming temperature is 1200-1250 ℃, the pressure is 30-40 MPa, and the time is 4-5 h; the size tolerance of the refractory brick obtained by hot press molding is less than or equal to 0.1 mm.
6. The method for manufacturing the bricked crucible for the vacuum induction furnace according to claim 1, wherein the bottom (4) of the crucible is composed of two layers of rectangular refractory bricks (1) which are built in a staggered manner, the middle (5) of the crucible is composed of inner-layer arc-shaped refractory bricks (2) and outer-layer arc-shaped refractory bricks (3) which are built in a staggered manner, and the upper (6) of the crucible is laminated with a pouring nozzle and is provided with the inner-layer arc-shaped refractory bricks (2) and the outer-layer arc-shaped refractory bricks (3) which are built in a staggered manner.
7. The method for preparing the bricked crucible for the vacuum induction furnace according to the claim 1, wherein the adjacent refractory bricks of the same layer of the crucible bottom (4) are jointed by refractory mortar, the rectangular refractory bricks between the layers are in direct contact, and the gap between the rectangular refractory bricks and the lining of the vacuum induction furnace is filled with ramming mass; the thickness of the refractory mortar is 0.6-0.8 mm.
8. The method for manufacturing a bricked crucible for a vacuum induction furnace according to claim 1, wherein the arc-shaped refractory bricks of the middle portion (5) of the crucible comprise two radial layers, and adjacent refractory bricks are in direct contact without using refractory mortar for bonding.
9. The method for manufacturing a bricked crucible for a vacuum induction furnace according to claim 1, wherein the upper portion (6) of the crucible is provided with a nozzle which is built into the interior of a casting steel tank.
10. A bricked crucible for a vacuum induction furnace, characterized by being prepared by the preparation method of claim 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410994A (en) * | 2021-12-30 | 2022-04-29 | 北京科技大学 | Based on CaO-MgO-Al2O3Method for smelting nickel-based high-temperature alloy by using refractory material |
| CN116239390A (en) * | 2023-01-17 | 2023-06-09 | 包头钢铁（集团）有限责任公司 | Preparation process method of refractory brick crucible of 25kg vacuum induction furnace |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255028A (en) * | 2008-04-02 | 2008-09-03 | 尹锡圭 | Hollow brick and method for making same |
| CN101613214A (en) * | 2009-07-23 | 2009-12-30 | 北京通达耐火技术股份有限公司 | A kind of magnesia-hercynite brick used by high temperature zone of cement kiln and using method thereof |
| CN101649368A (en) * | 2009-09-10 | 2010-02-17 | 武汉钢铁(集团)公司 | Method for integrally pouring mixer furnace |
| CN102980397A (en) * | 2011-09-05 | 2013-03-20 | 鞍钢集团工程技术有限公司 | Graphite crucible |
| CN104142059A (en) * | 2013-05-10 | 2014-11-12 | 大连融德特种材料有限公司 | Crucible for preparing aluminum-base intermediate alloy through aluminothermic reduction method |
| CN204438084U (en) * | 2015-02-04 | 2015-07-01 | 黑龙江倍丰农业生产资料集团宁安化工有限公司 | A kind of Novel industrial boiler |
| CN104987085A (en) * | 2015-06-10 | 2015-10-21 | 马鞍山金晟工业设计有限公司 | Environment-friendly low-cost fireproofing material using magnesite bricks and preparation method thereof |
| CN207659487U (en) * | 2017-12-13 | 2018-07-27 | 黑龙江北方工具有限公司 | A kind of Quench heating salt bath furnace inner-tube structure |
| CN208545452U (en) * | 2018-07-11 | 2019-02-26 | 北京首钢国际工程技术有限公司 | A kind of non-circular channels hot air duct masonry construction |
| CN208684418U (en) * | 2018-08-28 | 2019-04-02 | 湖南烯瑞自动化设备有限公司 | A kind of graphitizing furnace and its seal |
-
2021
- 2021-08-06 CN CN202110900832.9A patent/CN113606941A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255028A (en) * | 2008-04-02 | 2008-09-03 | 尹锡圭 | Hollow brick and method for making same |
| CN101613214A (en) * | 2009-07-23 | 2009-12-30 | 北京通达耐火技术股份有限公司 | A kind of magnesia-hercynite brick used by high temperature zone of cement kiln and using method thereof |
| CN101649368A (en) * | 2009-09-10 | 2010-02-17 | 武汉钢铁(集团)公司 | Method for integrally pouring mixer furnace |
| CN102980397A (en) * | 2011-09-05 | 2013-03-20 | 鞍钢集团工程技术有限公司 | Graphite crucible |
| CN104142059A (en) * | 2013-05-10 | 2014-11-12 | 大连融德特种材料有限公司 | Crucible for preparing aluminum-base intermediate alloy through aluminothermic reduction method |
| CN204438084U (en) * | 2015-02-04 | 2015-07-01 | 黑龙江倍丰农业生产资料集团宁安化工有限公司 | A kind of Novel industrial boiler |
| CN104987085A (en) * | 2015-06-10 | 2015-10-21 | 马鞍山金晟工业设计有限公司 | Environment-friendly low-cost fireproofing material using magnesite bricks and preparation method thereof |
| CN207659487U (en) * | 2017-12-13 | 2018-07-27 | 黑龙江北方工具有限公司 | A kind of Quench heating salt bath furnace inner-tube structure |
| CN208545452U (en) * | 2018-07-11 | 2019-02-26 | 北京首钢国际工程技术有限公司 | A kind of non-circular channels hot air duct masonry construction |
| CN208684418U (en) * | 2018-08-28 | 2019-04-02 | 湖南烯瑞自动化设备有限公司 | A kind of graphitizing furnace and its seal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410994A (en) * | 2021-12-30 | 2022-04-29 | 北京科技大学 | Based on CaO-MgO-Al2O3Method for smelting nickel-based high-temperature alloy by using refractory material |
| CN116239390A (en) * | 2023-01-17 | 2023-06-09 | 包头钢铁（集团）有限责任公司 | Preparation process method of refractory brick crucible of 25kg vacuum induction furnace |
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