CN114739172B - Intermediate frequency induction smelting furnace crucible and furnace beating method thereof - Google Patents
Intermediate frequency induction smelting furnace crucible and furnace beating method thereof Download PDFInfo
- Publication number
- CN114739172B CN114739172B CN202210234869.7A CN202210234869A CN114739172B CN 114739172 B CN114739172 B CN 114739172B CN 202210234869 A CN202210234869 A CN 202210234869A CN 114739172 B CN114739172 B CN 114739172B
- Authority
- CN
- China
- Prior art keywords
- crucible
- coil
- furnace
- frequency induction
- intermediate frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000003723 Smelting Methods 0.000 title claims abstract description 65
- 230000006698 induction Effects 0.000 title claims abstract description 52
- 238000010009 beating Methods 0.000 title claims abstract description 34
- 239000011819 refractory material Substances 0.000 claims abstract description 50
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000006004 Quartz sand Substances 0.000 claims abstract description 30
- 239000003566 sealing material Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 239000003365 glass fiber Substances 0.000 claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000011049 filling Methods 0.000 claims description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- 239000010431 corundum Substances 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 1
- 229910001928 zirconium oxide Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 238000005056 compaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005429 filling process Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Classifications
-
- 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
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
-
- 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 specially adapted for crucible or pot furnaces
-
- 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 specially adapted for crucible or pot furnaces
- F27B14/10—Crucibles
-
- 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 specially adapted for crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
-
- 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
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
- F27B2014/066—Construction of the induction furnace
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention belongs to the technical field of crucible preparation, and discloses a crucible of an intermediate frequency induction smelting furnace and a furnace beating method thereof. According to the method, alkali-free glass fiber cloth is used as a bedding and added with refractory materials without mixing water glass to fill the bottom and the furnace lining of the coil, high-purity quartz sand is used as sealing materials, a dry method is used for manufacturing the furnace bottom and the furnace lining, and wet method mixing sealing is used for greatly reducing the disassembling time in the process of disassembling the crucible, so that the problems that the crucible is hard in the process of full wet method manufacturing, time and labor are wasted in the process of disassembling, the coil is damaged, the crucible is expanded due to heating, the coil is extruded together with the dried hard furnace lining material, and the coil is deformed and the like are avoided. The method of the invention can not pollute the smelting furnace when the crucible is manufactured outside the smelting furnace, for example, can avoid pollution when the smelting furnace is used for smelting high-purity metal.
Description
Technical Field
The invention relates to the technical field of crucible preparation, in particular to a crucible of an intermediate frequency induction smelting furnace and a furnace beating method thereof.
Background
In the vacuum induction smelting, induction current is obtained in an induction coil by electromagnetic induction, and materials placed in the coil are melted due to electromagnetic eddy current generated by the induction current. During smelting, materials are placed in a crucible, and the crucible is placed in a coil. Therefore, the crucible is a container for melting and refining metal liquid and heating and smelting solid and liquid, and is a necessary condition for ensuring the successful vacuum smelting. Under high temperature and vacuum conditions, various physicochemical effects can occur between the crucible and the superalloy melt, which can lead to erosion of the crucible material and contamination of the melt. Therefore, it is required that the crucible material should have good stability.
Chinese patent application CN 201310346517.1 discloses a method for baking and sintering crucible in medium frequency induction furnace, which comprises directly baking bottom of crucible in medium frequency induction furnace, forging side wall of crucible and crucible mold of furnace mouth by steel mold, and baking crucible mold by medium frequency induction furnace, wherein the baking and sintering process comprises baking, molten steel injection and heat preservation. The prepared crucible has high density, few cracks and stable quality. However, the crucible manufactured by the method for manufacturing, baking and sintering is easy to crack, less in using heat, inconvenient to machine operation in a limited space and affects the operation progress.
Chinese patent application CN201310351361.6 discloses a method for making crucible semi-automatically by wet method. According to the method, a stirrer is used for replacing manpower during mixing, and a tamping machine is used for reinforcing the compaction degree during forging the crucible bottom and the crucible wall, so that the uniformity of mixing and the compaction degree of forging are improved. However, the crucible produced by the method can crack the crucible wall due to excessive moisture in the baking and sintering process, and the production method is complex.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a crucible of an intermediate frequency induction smelting furnace and a furnace beating method thereof.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a furnace beating method of a crucible of an intermediate frequency induction smelting furnace, comprising the following steps of:
(1) Placing a coil outside a smelting furnace, and placing an alumina corundum firing plate at the bottom of the coil; paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory materials into the bottom layer of the coil, compacting, and placing into a crucible; the addition of the refractory material makes the top of the placed crucible be 20-30 mm higher than the coil;
(3) Refractory materials are filled between the crucible and the coil, compacting is carried out, the furnace lining is compacted, and a groove of 10-15 mm is reserved at the uppermost coil opening;
(4) Smearing the sealing material into the groove to obtain a manufactured coil;
(5) And installing the obtained manufactured coil into an intermediate frequency induction furnace, putting a high-melting-point metal block into the crucible, and baking and sintering the crucible to obtain the coil.
In the step (1), the size of the alumina corundum firing plate is 15mm to 20mm smaller than the inner diameter of the coil.
In the step (2), the refractory is at least one of magnesia, zirconia, alumina, and chromia as a preferred embodiment of the method for tapping a crucible of an intermediate frequency induction melting furnace according to the present invention. Preferably, the refractory material is zirconia, and the prepared crucible has stronger high-temperature resistance and longer service time.
As a preferred embodiment of the method for tapping a crucible of an intermediate frequency induction melting furnace according to the present invention, in the step (2), the crucible is placed in the center of the coil while the top of the crucible is nearly horizontal.
In the step (4), the sealing material comprises water glass and high-purity quartz sand with a mass ratio of (0.2-0.3): 1.
As the preferred implementation mode of the furnace beating method of the intermediate frequency induction smelting furnace crucible, the high-purity quartz sand comprises high-purity quartz sand a, high-purity quartz sand b and high-purity quartz sand c with the mass ratio of (3.5-4.5): (2.5-3.5): (2-2.5); the granularity of the high-purity quartz sand a is 2 mm-4 mm; the granularity of the high-purity quartz sand b is 0.1 mm-0.5 mm; the granularity of the high-purity quartz sand c is 0.01 mm-0.05 mm.
As a preferable embodiment of the furnace beating method of the intermediate frequency induction melting furnace crucible, in the step (5), the melting point of the high melting point metal block is more than or equal to 1300 ℃.
In the step (5), the baking and sintering conditions are normal pressure, 800 to 1000 ℃ and the time is 1 to 2 hours.
In a second aspect, the invention provides an intermediate frequency induction furnace crucible prepared by the furnace beating method.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the method, alkali-free glass fiber cloth is used as a bedding and added with refractory materials without mixing water glass to fill the bottom and the furnace lining of the coil, high-purity quartz sand is used as sealing materials, a dry method is used for manufacturing the furnace bottom and the furnace lining, and wet method mixing sealing is used for greatly reducing the disassembly time in the process of disassembling the crucible, so that the problems that the crucible is hard, the disassembly process wastes time and labor, the coil is damaged, the crucible is expanded due to heating during heating, the coil is extruded together with the dried hard furnace lining material to deform the coil and the like are solved, the use furnace number of the crucible is remarkably improved, and the maximum furnace number can reach 10.
2. The method of the invention can not pollute the smelting furnace when the crucible is manufactured outside the smelting furnace, for example, can avoid pollution when the smelting furnace is used for smelting high-purity metal.
Drawings
FIG. 1 is a process flow diagram of a method for tapping a crucible of an intermediate frequency induction melting furnace according to the present invention.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples. It will be appreciated by persons skilled in the art that the specific embodiments described herein are for purposes of illustration only and are not intended to be limiting.
The furnace beating method of the intermediate frequency induction smelting furnace crucible comprises the following steps:
(1) The coil is prepared to be placed outside the smelting furnace, and an alumina corundum burning plate is placed at the bottom of the coil; the heat-resistant temperature of the alumina plate can reach 1700 ℃, and the heat conductivity is low; the size of the alumina plate is 20mm smaller than the inner diameter of the coil, the coil is not blocked and difficult to put in when the coil is put in, the subsequent step of filling the refractory material is more effective, and in the range, the larger the area of the bottom of the coil occupied by the alumina plate is, the more the filled refractory material cannot leak out of the coil;
after the alumina plate is placed, paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil; the alkali-free glass fiber cloth is thinner and denser than the common asbestos fire-resistant cloth, dust particles are not easy to leak out, and dust is prevented from leaking out in the vacuumizing process of the smelting furnace, so that the vacuum degree is influenced;
(2) The bottom layer of the coil is filled with refractory materials, and the filling amount is required to lead the top of the placed crucible to be 20-30 mm higher than the coil, so as to avoid the contact of molten metal with the coil during casting and the damage to the coil; after being filled with refractory materials, the refractory materials are compacted and compacted, then the refractory materials are placed in a crucible, the crucible is placed in the center of a coil, the top of the crucible is approximately horizontal, then the refractory materials are filled between the crucible and the coil, the compaction and compaction are carried out in the filling process, and the compaction is carried out while the compaction is carried out, so that a furnace lining is fully compacted, the furnace lining is favorable for buffering a low-temperature area of the expansion of the crucible caused by heating and the water cooling of the coil in the smelting and heating process, a groove with the thickness of 10-15 mm is reserved when the furnace is filled to the uppermost coil opening, and sand and stone can be covered when the furnace is sealed;
(3) And (3) preparing a sealing material: preparing high-purity quartz sand with the granularity of 2-4 mm, 0.1-0.5 mm and 0.01-0.05 mm, mixing according to the mass ratio of (3.5-4.5): 2.5-3.5): 2-2.5, and then adding water glass, wherein the mass ratio of the water glass to the total mass of the quartz sand is (0.2-0.3): 1, stirring to a viscous state to obtain a sealing material, and smearing the sealing material on a coil seal to ensure that refractory materials are not leaked;
(4) The manufactured coil is arranged in an induction furnace, a high-melting-point (more than 1300 ℃) metal block is put into a crucible, the crucible is heated and baked by using an intermediate frequency induction furnace at normal pressure and 800-1000 ℃, and the crucible can be dried within 1-2 hours.
The smelting furnace number of the crucible manufactured by the steps can reach 10 at most. The method is used for manufacturing the crucible outside the smelting furnace, so that the pollution to the smelting furnace is avoided, and no exogenous pollution is caused when high-purity metal smelting is performed.
Specific examples are as follows:
example 1: furnace beating method for crucible of medium-frequency induction smelting furnace
The furnace beating method comprises the following specific steps:
the furnace beating method of the intermediate frequency induction smelting furnace crucible comprises the following steps:
(1) The coil is prepared to be placed outside the smelting furnace, and an alumina corundum burning plate is placed at the bottom of the coil; the size of the alumina plate is 20mm smaller than the inner diameter of the coil; after the alumina plate is placed, paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory zirconia into the bottom layer of the coil, wherein the filling amount is required to lead the top of the placed crucible to be 20mm higher than the coil; after the refractory materials are filled, the refractory materials are compacted and compacted, then the refractory materials are placed in a crucible, the crucible is placed in the center of a coil, the top of the crucible is approximately horizontal, the refractory materials are filled between the crucible and the coil, the refractory materials are compacted and compacted in the filling process, and a 10mm groove is reserved when the refractory materials are filled and compacted at the same time and the refractory materials are fired to the uppermost coil opening;
(3) And (3) preparing a sealing material: high-purity quartz sand with granularity of 2mm, 0.1mm and 0.01mm is prepared according to the following formula 4:3:2, and adding water glass, wherein the mass ratio of the water glass to the total mass of the quartz sand is 0.2:1, stirring to a viscous state to obtain a sealing material, and smearing the sealing material on a coil for sealing;
(4) The prepared coil is arranged in an induction furnace, a high-melting-point (more than 1300 ℃) metal block is put into a crucible, the crucible is heated by an intermediate frequency induction furnace for 1.5 hours under normal pressure and 800 ℃, and the crucible can be dried.
The crucible smelting furnace number obtained through the steps can be used for 10 times. The crucible is manufactured outside the smelting furnace, so that the pollution to the smelting furnace is avoided, and no exogenous pollution is caused when high-purity metal smelting is performed.
Example 2: furnace beating method for crucible of medium-frequency induction smelting furnace
The furnace beating method comprises the following specific steps:
the furnace beating method of the intermediate frequency induction smelting furnace crucible comprises the following steps:
(1) The coil is prepared to be placed outside the smelting furnace, and an alumina corundum burning plate is placed at the bottom of the coil; the size of the alumina plate is 15mm smaller than the inner diameter of the coil; after the alumina plate is placed, paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory magnesia into the bottom layer of the coil, wherein the filling amount is required to enable the top of the placed crucible to be 25mm higher than the coil; after the refractory materials are filled, the refractory materials are compacted and compacted, then the refractory materials are placed in a crucible, the crucible is placed in the center of a coil, the top of the crucible is approximately horizontal, the refractory materials are filled between the crucible and the coil, the refractory materials are compacted and compacted in the filling process, and a 12mm groove is reserved when the refractory materials are filled and compacted at the same time and the refractory materials are fired to the uppermost coil opening;
(3) And (3) preparing a sealing material: high-purity quartz sand with granularity of 3mm, 0.5mm and 0.03mm is prepared according to the following ratio of 4.5:3.5:2.2, adding water glass, wherein the mass ratio of the water glass to the total mass of the quartz sand is 0.25:1, stirring to a viscous state to obtain a sealing material, and smearing the sealing material on a coil for sealing;
(4) The prepared coil is arranged in an induction furnace, a high-melting-point (more than 1300 ℃) metal block is put into a crucible, the crucible is heated by an intermediate frequency induction furnace for 1.5 hours under normal pressure and 900 ℃, and the crucible can be dried.
The crucible smelting furnace produced through the steps can be used for 8 times. The crucible is manufactured outside the smelting furnace, so that the pollution to the smelting furnace is avoided, and no exogenous pollution is caused when high-purity metal smelting is performed.
Example 3: furnace beating method for crucible of medium-frequency induction smelting furnace
The furnace beating method comprises the following specific steps:
the furnace beating method of the intermediate frequency induction smelting furnace crucible comprises the following steps:
(1) The coil is prepared to be placed outside the smelting furnace, and an alumina corundum burning plate is placed at the bottom of the coil; the size of the alumina plate is 20mm smaller than the inner diameter of the coil; after the alumina plate is placed, paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory alumina into the bottom layer of the coil, wherein the filling amount is required to be 30mm higher than the top of the placed crucible; after the refractory materials are filled, the refractory materials are compacted and compacted, then the refractory materials are placed in a crucible, the crucible is placed in the center of a coil, the top of the crucible is approximately horizontal, the refractory materials are filled between the crucible and the coil, the refractory materials are compacted and compacted in the filling process, and a 15mm groove is reserved when the refractory materials are filled and compacted at the same time and the refractory materials are fired to the uppermost coil opening;
(3) And (3) preparing a sealing material: high-purity quartz sand with granularity of 4mm, 0.2mm and 0.05mm is prepared according to the following 3.5:2.5:2.5, adding water glass, wherein the mass ratio of the water glass to the total mass of the quartz sand is 0.3:1, stirring to a viscous state to obtain a sealing material, and smearing the sealing material on a coil for sealing;
(4) The prepared coil is arranged in an induction furnace, a high-melting-point (more than 1300 ℃) metal block is put into a crucible, the crucible is heated by an intermediate frequency induction furnace for 1h under normal pressure and 1000 ℃, and the crucible can be dried.
The crucible smelting furnace number obtained through the steps can be used for 10 times. The crucible is manufactured outside the smelting furnace, so that the pollution to the smelting furnace is avoided, and no exogenous pollution is caused when high-purity metal smelting is performed.
Example 4: furnace beating method for crucible of medium-frequency induction smelting furnace
The furnace beating method comprises the following specific steps:
the furnace beating method of the intermediate frequency induction smelting furnace crucible comprises the following steps:
(1) The coil is prepared to be placed outside the smelting furnace, and an alumina corundum burning plate is placed at the bottom of the coil; the size of the alumina plate is 20mm smaller than the inner diameter of the coil; after the alumina plate is placed, paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory chromium oxide into the bottom layer of the coil, wherein the filling amount is required to ensure that the top of the placed crucible is 28mm higher than the coil; after the refractory materials are filled, the refractory materials are compacted and compacted, then the refractory materials are placed in a crucible, the crucible is placed in the center of a coil, the top of the crucible is approximately horizontal, the refractory materials are filled between the crucible and the coil, the refractory materials are compacted and compacted in the filling process, and a groove with the thickness of 18mm is reserved when the refractory materials are filled and compacted at the same time and the refractory materials are fired to the uppermost coil opening;
(3) And (3) preparing a sealing material: high-purity quartz sand with granularity of 3mm, 0.2mm and 0.05mm is prepared according to the following formula 4:2.5:2.5, and adding water glass, wherein the mass ratio of the water glass to the total mass of the quartz sand is 0.28:1, stirring to a viscous state to obtain a sealing material, and smearing the sealing material on a coil for sealing;
(4) The prepared coil is arranged in an induction furnace, a high-melting-point (more than 1300 ℃) metal block is put into a crucible, the crucible is heated by an intermediate frequency induction furnace for 1h under normal pressure and 1000 ℃, and the crucible can be dried.
The crucible smelting furnace number obtained through the steps can be used for 9 times. The crucible is manufactured outside the smelting furnace, so that the pollution to the smelting furnace is avoided, and no exogenous pollution is caused when high-purity metal smelting is performed.
Comparative example 1: furnace beating method for crucible of medium-frequency induction smelting furnace
The specific steps of the furnace beating method are different from those of the embodiment 1 in that:
in the step (2), refractory material is filled, and magnesia is filled into the bottom layer of the coil, wherein the filling amount is 35mm higher than the top of the placed crucible.
The number of times of use of the prepared crucible was 5.
Comparative example 2: furnace beating method for crucible of medium-frequency induction smelting furnace
The specific steps of the furnace beating method are different from those of the embodiment 1 in that:
in the step (2), refractory material is filled, and magnesia is filled into the bottom layer of the coil, wherein the filling amount is 40mm higher than the top of the placed crucible.
The produced crucible has obvious cracks after the smelting process of 3-5 furnaces is finished and casting is finished.
Comparative example 3: furnace beating method for crucible of medium-frequency induction smelting furnace
The specific steps of the furnace beating method are different from those of the embodiment 1 in that:
in the step (2), refractory material is filled, and the bottom layer of the coil is filled with refractory material magnesium oxide in an amount such that the top of the placed crucible is 50mm higher than the coil.
After the smelting process of the furnace 1-2 is finished and casting is finished, obvious cracks are generated from the top end to the middle of the crucible.
Comparative example 4: furnace beating method for crucible of medium-frequency induction smelting furnace
The specific steps of the furnace beating method are different from those of the embodiment 1 in that:
in the step (3), in the sealing material, the mass ratio of the added water glass to the total mass of the quartz sand is 0.1:1.
the prepared crucible sealing material is insufficiently mixed and adhered, and the sealing material is cracked when sintered.
Comparative example 5: furnace beating method for crucible of medium-frequency induction smelting furnace
The specific steps of the furnace beating method are different from those of the embodiment 1 in that:
in the step (3), in the sealing material, the mass ratio of the added water glass to the total mass of the quartz sand is 0.5:1.
the sealing material has excessive water, so that the heating, baking and sintering time in the step (4) is prolonged by more than 1 hour, and the furnace time can be used for 4 times.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. The furnace beating method of the intermediate frequency induction smelting furnace crucible is characterized by comprising the following steps of:
(1) Placing a coil outside a smelting furnace, and placing an alumina corundum firing plate at the bottom of the coil; paving a layer of alkali-free glass fiber cloth on the inner side and the bottom of the coil;
(2) Filling refractory materials into the bottom layer of the coil, compacting, and placing into a crucible; the addition of the refractory material makes the top of the placed crucible be 20-30 mm higher than the coil;
(3) Refractory materials are filled between the crucible and the coil, compacting is carried out, the furnace lining is compacted, and a groove of 10-15 mm is reserved at the uppermost coil opening;
(4) Smearing the sealing material into the groove to obtain a manufactured coil;
the sealing material comprises water glass and high-purity quartz sand with the mass ratio of (0.2-0.3) being 1;
(5) Installing the obtained manufactured coil into an intermediate frequency induction furnace, putting a high-melting-point metal block into the crucible, and baking and sintering to obtain the coil;
the conditions of baking and sintering are normal pressure, 800-1000 ℃ and the time is 1-2 hours.
2. The method of tapping a crucible for an intermediate frequency induction melting furnace according to claim 1, wherein in the step (1), the size of the alumina corundum setter plate is 15mm to 20mm smaller than the inner diameter of the coil.
3. The method of tapping a crucible for an intermediate frequency induction melting furnace according to claim 1, wherein in the step (2), the refractory material is at least one of magnesium oxide, zirconium oxide, aluminum oxide, and chromium oxide.
4. The method of tapping a crucible for an intermediate frequency induction melting furnace according to claim 1, wherein in said step (2), said crucible is placed in a central position of said coil with a top of said crucible being nearly horizontal.
5. The furnace beating method of the intermediate frequency induction melting furnace crucible according to claim 1, wherein the high purity quartz sand comprises high purity quartz sand a, high purity quartz sand b and high purity quartz sand c with mass ratio of (3.5-4.5): (2.5-3.5): (2-2.5); the granularity of the high-purity quartz sand a is 2 mm-4 mm; the granularity of the high-purity quartz sand b is 0.1 mm-0.5 mm; the granularity of the high-purity quartz sand c is 0.01 mm-0.05 mm.
6. The method for tapping a crucible for an intermediate frequency induction melting furnace according to claim 1, wherein in said step (5), the melting point of said high melting point metal block is not less than 1300 ℃.
7. An intermediate frequency induction melting furnace crucible produced by the furnace tapping method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210234869.7A CN114739172B (en) | 2022-03-09 | 2022-03-09 | Intermediate frequency induction smelting furnace crucible and furnace beating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210234869.7A CN114739172B (en) | 2022-03-09 | 2022-03-09 | Intermediate frequency induction smelting furnace crucible and furnace beating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114739172A CN114739172A (en) | 2022-07-12 |
| CN114739172B true CN114739172B (en) | 2023-12-05 |
Family
ID=82274478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210234869.7A Active CN114739172B (en) | 2022-03-09 | 2022-03-09 | Intermediate frequency induction smelting furnace crucible and furnace beating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114739172B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115406232A (en) * | 2022-08-30 | 2022-11-29 | 贵州安吉航空精密铸造有限责任公司 | Quick-change bushing structure of crucible for vacuum melting and pouring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495495A (en) * | 1995-05-25 | 1996-02-27 | Saint-Gobain/Norton Industrial Ceramics Corporation | Dense lining for coreless induction furnace |
| JP2001027483A (en) * | 1999-07-15 | 2001-01-30 | Fuji Electric Co Ltd | Ecological induction furnace |
| CN103673619A (en) * | 2013-11-27 | 2014-03-26 | 福州文泰机械铸造有限公司 | Method for building high-age medium-frequency induction furnace through quartz sand and use method |
| CN113074550A (en) * | 2021-05-06 | 2021-07-06 | 先导薄膜材料（广东）有限公司 | Furnace striking method for vacuum induction smelting furnace crucible |
-
2022
- 2022-03-09 CN CN202210234869.7A patent/CN114739172B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495495A (en) * | 1995-05-25 | 1996-02-27 | Saint-Gobain/Norton Industrial Ceramics Corporation | Dense lining for coreless induction furnace |
| JP2001027483A (en) * | 1999-07-15 | 2001-01-30 | Fuji Electric Co Ltd | Ecological induction furnace |
| CN103673619A (en) * | 2013-11-27 | 2014-03-26 | 福州文泰机械铸造有限公司 | Method for building high-age medium-frequency induction furnace through quartz sand and use method |
| CN113074550A (en) * | 2021-05-06 | 2021-07-06 | 先导薄膜材料（广东）有限公司 | Furnace striking method for vacuum induction smelting furnace crucible |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114739172A (en) | 2022-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5416795A (en) | Quick change crucible for vacuum melting furnace | |
| EP2006260B1 (en) | Refractory composition for glass melting furnaces | |
| CN114739172B (en) | Intermediate frequency induction smelting furnace crucible and furnace beating method thereof | |
| CN107512918A (en) | A kind of preformed bricks of resource reusing | |
| CN108911749A (en) | A kind of preparation method of graphite-silicon carbide crucible | |
| CN112595119A (en) | Furnace building method for medium-frequency induction furnace | |
| CN110595211A (en) | Furnace building process for ramming mass plastic material | |
| US5482257A (en) | Non-graphite crucible for high temperature applications | |
| CN111023806A (en) | Preparation method of crucible for 25kg vacuum induction furnace | |
| CN109095902B (en) | Paving brick for glass kiln and production process thereof | |
| CN112321282B (en) | High-strength magnesium oxide crucible and preparation method thereof | |
| CN111647712B (en) | Converter with replaceable converter bottom and method for replacing converter bottom | |
| CN105424444B (en) | A kind of fireproof material slag resistance sample and preparation method thereof | |
| CN108285351A (en) | A kind of tundish upper nozzle spinel material and its application | |
| CN110530158B (en) | Medium-frequency induction furnace and furnace building method and using method thereof | |
| CN114804823A (en) | Heat-insulating refractory material for air supply device of iron-making blast furnace | |
| CN104019666A (en) | Immediate repairing method for intermediate frequency furnace body crucible | |
| CN111977944B (en) | Method and structure for processing expansion joint of crown of melting furnace | |
| JP3928818B2 (en) | Induction furnace | |
| CN212457932U (en) | Automatic discharging device of light-burning kiln | |
| CN103388055A (en) | Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure | |
| CN112964062A (en) | Preparation method of crucible for vacuum induction melting furnace | |
| CN111792939A (en) | High-aluminum brick and preparation method thereof | |
| CN110567270A (en) | Molten metal casting smelting system and installation method thereof | |
| CN213388767U (en) | RH dip pipe structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |