CN113333723A - System and method for smelting piano string iron plate cast medium-frequency electric furnace - Google Patents
System and method for smelting piano string iron plate cast medium-frequency electric furnace Download PDFInfo
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- CN113333723A CN113333723A CN202110600873.6A CN202110600873A CN113333723A CN 113333723 A CN113333723 A CN 113333723A CN 202110600873 A CN202110600873 A CN 202110600873A CN 113333723 A CN113333723 A CN 113333723A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 92
- 238000003723 Smelting Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 77
- 239000002994 raw material Substances 0.000 claims abstract description 71
- 230000006698 induction Effects 0.000 claims abstract description 57
- 239000000779 smoke Substances 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000005266 casting Methods 0.000 claims description 33
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005987 sulfurization reaction Methods 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000002912 waste gas Substances 0.000 abstract description 5
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000571 coke Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
- B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
Abstract
The invention provides a system and a method for smelting a piano string iron plate by using a medium-frequency electric furnace, wherein the system comprises the medium-frequency electric furnace, a medium-frequency electric furnace induction coil crucible is arranged in the medium-frequency electric furnace, a coil of the medium-frequency electric furnace induction coil crucible is connected with a variable-frequency power supply device through a power line, and the medium-frequency electric furnace induction coil crucible is connected with a circulating cooling system for cooling the coil; and the medium-frequency electric furnace is connected with a dust removal device for removing dust. The smelting system adopts an intermediate frequency electric furnace to smelt, and can effectively control waste gas, smoke dust and slag generated during smelting. Is convenient for environmental protection to control the environment and improve the operation. The raw material input amount of the piano string iron plate is also well controlled, and the yield of the piano string iron plate can be accurately controlled.
Description
Technical Field
The invention belongs to the field of piano production equipment, and particularly relates to a system and a method for casting a piano string iron plate by using an intermediate frequency electric furnace.
Background
Among the components of a piano, piano string iron plates have a critical role. The raw material proportion and smelting directly influence the tensile strength and tone of the piano string iron plate. After the piano string iron plate is stringed, tension of about 15-25 tons can be generated. The technology is applied to the technology of casting the piano string iron plate by using the medium-frequency electric furnace, and the raw materials of the piano string iron plate are put into the medium-frequency electric furnace for smelting according to the proportion. After testing the components, casting the piano string iron plate.
Heretofore, cupola furnaces are used for casting and smelting piano string iron plates. The cupola furnace is used for burning coke to smelt the raw material of the piano string iron plate at high temperature, and the waste gas, smoke and slag discharged during smelting are more. Is inconvenient for environmental management and operation condition improvement and can not meet the requirement of environmental protection. And point slag is generated during jet smelting in the smelting process, so that potential safety hazards are caused. The temperature of coke can reach 1700 ℃ when burning, and the high temperature resistance strength of the sand mould used for casting and modeling the piano string iron plate is only about 1300 ℃.
Disclosure of Invention
The invention aims to solve the technical problem of providing a system and a method for smelting a piano string iron plate by using an intermediate frequency electric furnace, wherein the smelting system adopts the intermediate frequency electric furnace to smelt and can effectively control waste gas, smoke dust and slag generated during smelting. Is convenient for environmental protection to control the environment and improve the operation. The raw material input amount of the piano string iron plate is also well controlled, and the yield of the piano string iron plate can be accurately controlled.
In order to achieve the technical features, the invention is realized as follows: a smelting system of a medium-frequency electric furnace for casting a piano string iron plate comprises a medium-frequency electric furnace, wherein a medium-frequency electric furnace induction coil crucible is arranged in the medium-frequency electric furnace, a coil of the medium-frequency electric furnace induction coil crucible is connected with a variable-frequency power supply device through a power line, and the medium-frequency electric furnace induction coil crucible is connected with a circulating cooling system for cooling the coil; and the medium-frequency electric furnace is connected with a dust removal device for removing dust.
And an electric furnace induction coil furnace charge ramming lining die is arranged in the intermediate frequency electric furnace induction coil crucible.
And a raw material lifting platform for adding raw materials is arranged at the top of the induction coil crucible of the medium-frequency electric furnace.
The circulation cooling system links to each other including the cooling tank that is used for the water storage, the cooling tank links to each other with power closed cooling tower, power closed cooling tower leads to pipe and links to each other with intermediate frequency electric stove induction coil crucible to be used for the cooling to the coil, the cooling tank passes through multistage water pump and circulating pipe and links to each other with the circulating water export of intermediate frequency electric stove induction coil crucible.
The central integrated smoke purifier is connected with the induction coil crucible of the medium-frequency electric furnace through a dust suction pipeline, and smoke, carbon dioxide and sulfuration gas are pumped into the central integrated smoke purifier by a fan to be filtered.
And a water pressure gauge is arranged on a pipeline between the cooling pool and the power supply closed cooling tower, and the water pressure is kept at 0.06 pa-0.12 pa.
The method also comprises the step of storing the smelted molten iron in a ladle.
The system also comprises a furnace front rapid thermal analyzer for analyzing the components of the smelted molten iron.
The power supply closed cooling tower and the multistage water pump are connected with a cooling system distribution box for controlling the operation of the cooling tower.
A method for casting a piano string iron plate by using a piano string iron plate casting intermediate frequency electric furnace smelting system comprises the following steps:
step one, starting a circulating cooling system: pumping water in the cooling pool by using a multistage water pump, circularly feeding the water into a power supply closed cooling tower, refluxing the water into an induction coil of the medium-frequency electric furnace for cooling, and protecting the induction coil of the medium-frequency electric furnace from melting due to high temperature when the raw material of the string iron plate of the piano is smelted, wherein the water pressure is kept between 0.06pa and 0.12 pa;
step two, opening the central integrated smoke purifier: during the smelting process of the casting raw materials of the piano string iron plates, a large amount of smoke, carbon dioxide and sulfur harmful gases are generated and pumped into a smoke purifier by a fan for filtering, so that the smoke reaches the international emission standard;
step three, raw materials are added: the method comprises the following steps of transferring raw materials of the piano string iron plate to the edge of a crucible of a medium-frequency electric furnace by using a raw material lifting platform, putting the raw materials into the crucible, starting a variable-frequency power supply device only after half capacity of the raw materials is required, sequentially putting the proportioned residual raw materials after the raw materials are melted, ensuring that the raw materials of the piano string iron plate of a feeding box are smelted in the same electric furnace crucible during feeding, and immediately pouring the raw materials into a ladle after cleaning slag generated during electric furnace smelting when the smelting temperature reaches a standard temperature;
Step four, component inspection: further cleaning slag generated on the surface in the ladle, directly influencing the product quality of the piano string iron plate by the quality of the smelted raw materials, taking a ladle raw material sample by using an end hopper, analyzing the raw material proportion by using a stokehole rapid thermal analyzer, checking whether the requirement of the piano string iron plate is met, pouring the ladle into a piano string iron plate sand mold, and taking the piano string iron plate out after cooling;
and step five, after the crucible is continuously used for several days, the electric furnace crucible forming material reaches the use upper limit, and the refractory material is constructed into the medium-frequency electric furnace induction coil crucible by using an electric furnace building machine and an electric furnace induction coil furnace smashing lining mold after being smashed.
The invention has the following beneficial effects:
1. by adopting the smelting system, the smelting process is stable, the electromagnetic stirring function is realized according to the passing of current, the temperature and chemical components of the metal liquid are uniform, and the element burning loss is small.
2. By adopting the smelting system, the smelting of nonferrous metals can reduce melting loss, inert gas is blown for refining and protection, and non-oxidation smelting can be realized.
3. The raw materials of the piano string iron plate smelting system are clean, and the environment pollution is small.
4. By adopting the smelting system, the smelting power density is high and can reach 600-900 KW/T, the smelting speed is fast, and the melting unit consumption is higher than that of a power frequency induction furnace bottom.
5. The casting method is applied to a piano string iron plate casting production line, the casting temperature is accurate, and the slag-free casting process is mechanized and automated.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a system diagram of the present invention.
In the figure: the device comprises a power supply closed cooling tower 1, a multi-stage water pump 2, a cooling pool 3, a cooling system distribution box 4, a water pressure gauge 5, a central integrated smoke purifier 6, a raw material lifting platform 7, a medium-frequency electric furnace 8, an electric furnace induction coil furnace charge ramming lining mold 9, a medium-frequency electric furnace induction coil crucible 10, a variable frequency power supply device 11, a power line 12, a ladle 13, a stokehole rapid thermal analyzer 14 and a circulating pipe 15.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1, the piano string iron plate casting medium-frequency electric furnace smelting system comprises a medium-frequency electric furnace 8, wherein a medium-frequency electric furnace induction coil crucible 10 is arranged inside the medium-frequency electric furnace 8, a coil of the medium-frequency electric furnace induction coil crucible 10 is connected with a variable-frequency power supply device 11 through a power line 12, and the medium-frequency electric furnace induction coil crucible 10 is connected with a circulating cooling system for cooling the coil; and the medium-frequency electric furnace 8 is connected with a dust removal device for removing dust. Through adopting the intermediate frequency electric furnace system of smelting of above-mentioned structure, adopt intermediate frequency electric furnace to smelt the waste gas, smoke and dust and the slag that can effectual control produce when smelting. Is convenient for environmental protection to control the environment and improve the operation. The raw material input amount of the piano string iron plate is also well controlled, and the yield of the piano string iron plate can be accurately controlled.
Further, an electric furnace induction coil furnace charge smashing lining mold 9 is arranged inside the intermediate frequency electric furnace induction coil crucible 10. The furnace charge ramming lining die 9 for the electric furnace induction coil can be used for realizing smelting.
Further, a raw material lifting platform 7 for adding raw materials is arranged at the top of the medium-frequency electric furnace induction coil crucible 10. The raw material to be smelted can be sent into the induction coil crucible 10 of the medium-frequency electric furnace through the raw material lifting platform 7, and then automatic feeding is realized.
Further, the circulation cooling system links to each other including the cooling tank 3 that is used for the water storage, cooling tank 3 links to each other with power closed cooling tower 1, power closed cooling tower 1 leads to pipe and links to each other with intermediate frequency electric stove induction coil crucible 10 to be used for the cooling to the coil, cooling tank 3 leads to the circulation water outlet of multistage water pump 2 and circulating pipe 15 with intermediate frequency electric stove induction coil crucible 10 and links to each other. The circulating cooling system with the structure can be used for cooling the induction coil of the electric furnace, and further preventing the induction coil from being burnt due to overhigh temperature. In the working process, water in the power supply closed cooling tower 1 is sent into a cooling area of the induction coil crucible 10 of the medium-frequency electric furnace, so that the cooling area is cooled, and the reflowing water reflows to the cooling pool 3 through the circulating pipe 15 and the multi-stage water pump 2 and is stored.
Further, the central integrated smoke purifier 6 is connected with the medium frequency electric furnace induction coil crucible 10 through a dust suction pipeline 16, and the smoke, carbon dioxide and sulfuration gas are pumped into the central integrated smoke purifier 6 by a fan for filtering. The central integrated smoke dust purifier 6 can be used for recycling waste gas generated in the smelting process, and achieves the good environment-friendly purpose.
Furthermore, a water pressure gauge 5 is arranged on a pipeline between the cooling pool 3 and the power supply closed cooling tower 1, and the water pressure is kept at 0.06 pa-0.12 pa. The water pressure gauge 5 can be used for controlling the water pressure, thereby ensuring the optimal cooling effect.
Further, the method also comprises a step of storing the smelted molten iron in a ladle 13. The ladle 13 described above can be used to store molten iron after melting.
Further, a stokehole rapid thermal analyzer 14 for analyzing the composition of the melted molten iron is also included. The composition analysis of the molten iron after melting can be rapidly realized by the above-mentioned stokehole rapid thermal analyzer 14. The composition ratio of the piano string iron plate is effectively controlled, and the piano string iron plate is accurately controlled.
Further, the power supply closed cooling tower 1 and the multi-stage water pumps 2 are connected with a cooling system distribution box 4 for controlling the operation of the cooling tower. The distribution box 4 of the cooling system can be used for controlling the work of the power supply closed cooling tower 1 and the multistage water pumps 2.
Example 2:
a method for casting a piano string iron plate by using a piano string iron plate casting intermediate frequency electric furnace smelting system comprises the following steps:
step one, starting a circulating cooling system: water in the cooling pool 3 is pumped by a multistage water pump 2, circularly enters a power supply closed cooling tower 1, flows back to an induction coil of a medium-frequency electric furnace 8 for cooling, and protects the induction coil of the medium-frequency electric furnace from melting due to high temperature when the raw material of the string iron plate of the piano is smelted, and the water pressure is kept between 0.06pa and 0.12 pa;
step two, opening the central integrated smoke purifier 6: during the smelting process of the casting raw materials of the piano string iron plates, a large amount of smoke, carbon dioxide and sulfur harmful gases are generated and pumped into a smoke purifier by a fan for filtering, so that the smoke reaches the international emission standard;
step three, raw materials are added: the raw material lifting platform 7 is used for transferring the raw material of the piano string iron plate to the edge of a crucible of a medium-frequency electric furnace, the raw material is put into the crucible, the variable-frequency power supply device 11 can be started only after half capacity is reached, the proportioned residual raw materials are put into the crucible after being melted, the raw material of the piano string iron plate of a feeding box is ensured to be smelted in the same electric furnace crucible during feeding, and the raw material is immediately poured into a ladle 13 after slag generated during electric furnace smelting is cleaned when the smelting temperature reaches the standard temperature;
Step four, component inspection: further cleaning slag generated on the surface in the ladle 13, directly influencing the product quality of the piano string iron plate by the quality of the smelted raw materials, taking a ladle raw material sample by using an end hopper, analyzing the raw material proportion by using a stokehole rapid thermal analyzer 14, checking whether the requirement of the piano string iron plate is met, pouring the ladle into a piano string iron plate sand mold, and taking the piano string iron plate out after cooling;
and step five, after the crucible is continuously used for several days, the electric furnace crucible forming material reaches the use upper limit, and the refractory material is required to be broken and then constructed into the medium-frequency electric furnace induction coil crucible 10 by using an electric furnace building machine and an electric furnace induction coil furnace-pounding material lining die.
The principle of the invention is as follows:
the induction coil is cooled and protected when the electric furnace does work through the circulating cooling system, the central integrated smoke dust purifier 6 treats harmful gas generated by casting and smelting of the piano string iron plate, raw materials of the piano string iron plate are put into the medium-frequency electric furnace 8 according to the proportion ratio to be smelted, and the components of the raw materials are tested and then cast into the piano string iron plate.
The piano string iron plate is smelted by a medium-frequency electric furnace, which is a crucible furnace utilizing electric induction heating to smelt raw materials of the piano string iron plate. After the piano string iron plate in the induction furnace is melted, the temperature of the molten iron is quickly raised due to high thermal efficiency, and the temperature can be easily regulated and controlled to the temperature required by people.
The chemical composition of the piano string iron plate is not generally used as a quality acceptance standard. However, it affects not only the mechanical properties of the piano string iron plate but also the casting properties of the piano string iron plate, and therefore, it is strictly controlled. The calculation difference between the components obtained after the medium-frequency electric furnace is melted and the ingredients is small, and the components are easier to regulate and control due to less element oxidation loss. The mechanical property and the casting property of the piano string iron plate can be effectively controlled by controlling the raw material proportioning elements.
The working process of the invention is as follows:
the circulating cooling system mainly utilizes the multistage water pump 2 to extract water in the cooling pool 3, circularly enters the power supply closed cooling tower HRBL-30T, and reflows to the induction coil of the intermediate frequency electric furnace 8 for cooling. When the raw material of the piano string iron plate is smelted, the induction coil of the medium-frequency electric furnace is protected from being melted due to high temperature, and the water pressure is kept between 0.06pa and 0.12 pa.
And meanwhile, the central integrated smoke dust purifier 6 is started, and the cast raw materials of the piano string iron plates are smelted. A large amount of smoke, carbon dioxide, sulfur and other harmful gases are generated. The smoke dust is pumped into a smoke dust purifier by a fan for filtering, so that the smoke dust reaches the international emission standard.
And (3) transferring the raw materials of the piano string iron plates to the edge of the crucible of the medium-frequency electric furnace by using the raw material lifting platform 7. The raw materials are put into the crucible, and the variable frequency power supply device 11 is turned on only after the raw materials reach half the capacity. After the raw materials are melted, the rest raw materials with good proportioning are added in sequence. When feeding, the raw materials of the piano string iron plates of the feeding box are required to be smelted in the same electric furnace crucible. When the smelting temperature reaches the standard temperature, slag generated during electric furnace smelting is cleaned and then poured into a ladle immediately.
Further cleaning of the slag formed on the surface of the ladle 13 is required. The quality of the smelted raw materials directly influences the product quality of the piano string iron plate. And taking out a ladle raw material sample by using an end hopper, analyzing the raw material proportion by using a stokehold rapid thermal analyzer, and checking whether the requirement of the piano string iron plate is met. And then, casting the mixture into a piano string iron plate sand mold by using foundry ladles. And taking out the piano string iron plate after cooling.
After several days of continuous use, the electric furnace crucible constituent material reaches the upper limit of use. After the crucible is needed to be broken, the refractory material is constructed into the medium-frequency electric furnace induction coil crucible by an electric furnace building machine ZL-1 and an electric furnace induction coil furnace charge smashing lining mold.
Claims (10)
1. The utility model provides a system is smelted to piano string iron plate casting intermediate frequency electric stove which characterized in that: the device comprises a medium-frequency electric furnace (8), wherein a medium-frequency electric furnace induction coil crucible (10) is arranged inside the medium-frequency electric furnace (8), a coil of the medium-frequency electric furnace induction coil crucible (10) is connected with a variable-frequency power supply device (11) through a power line (12), and the medium-frequency electric furnace induction coil crucible (10) is connected with a circulating cooling system for cooling the coil; and the medium-frequency electric furnace (8) is connected with a dust removal device for removing dust.
2. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: and an electric furnace induction coil furnace charge ramming lining mold (9) is arranged in the intermediate frequency electric furnace induction coil crucible (10).
3. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: and a raw material lifting platform (7) for adding raw materials is arranged at the top of the medium-frequency electric furnace induction coil crucible (10).
4. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: the circulation cooling system is connected with a cooling pool (3) including a water storage tank, the cooling pool (3) is connected with a power supply closed cooling tower (1), the power supply closed cooling tower (1) is connected with an intermediate frequency electric furnace induction coil crucible (10) through a water pipe and used for cooling a coil, and the cooling pool (3) is connected with a circulation water outlet of the intermediate frequency electric furnace induction coil crucible (10) through a multi-stage water pump (2) and a circulation pipe (15).
5. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: the central integrated smoke purifier (6) is connected with the medium-frequency electric furnace induction coil crucible (10) through a dust suction pipeline (16), and smoke, carbon dioxide and sulfuration gas are pumped into the central integrated smoke purifier (6) by a fan to be filtered.
6. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 4, wherein: and a water pressure gauge (5) is arranged on a pipeline between the cooling pool (3) and the power supply closed cooling tower (1), and the water pressure is kept at 0.06 pa-0.12 pa.
7. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: the method also comprises a step of storing the smelted molten iron in a ladle (13).
8. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 1, wherein: the system also comprises a stokehole rapid thermal analyzer (14) for analyzing the components of the smelted molten iron.
9. The piano string iron plate casting medium-frequency electric furnace smelting system of claim 4, wherein: the power supply closed cooling tower (1) and the multi-stage water pumps (2) are connected with a cooling system distribution box (4) used for controlling the work of the cooling tower.
10. The method for casting the piano string iron plate by adopting the medium-frequency electric furnace smelting system for casting the piano string iron plate as claimed in any one of claims 1 to 9, is characterized by comprising the following steps of:
step one, starting a circulating cooling system: water in the cooling pool (3) is pumped by a multistage water pump (2), circularly enters a power supply closed cooling tower (1), flows back to an induction coil of the medium-frequency electric furnace (8) for cooling, and when raw materials of a string iron plate of a piano are smelted, the induction coil of the medium-frequency electric furnace is protected from being melted due to high temperature, and the water pressure is kept between 0.06pa and 0.12 pa;
Step two, opening the central integrated smoke purifier (6): during the smelting process of the casting raw materials of the piano string iron plates, a large amount of smoke, carbon dioxide and sulfur harmful gases are generated and pumped into a smoke purifier by a fan for filtering, so that the smoke reaches the international emission standard;
step three, raw materials are added: the method comprises the following steps that raw materials of the piano string iron plate are transferred to the edge of a crucible of a medium-frequency electric furnace by using a raw material lifting platform (7), the raw materials are put into the crucible, a variable-frequency power supply device (11) can be started only after half capacity of the raw materials is reached, the proportioned residual raw materials are put into the crucible in sequence after the raw materials are melted, the raw materials of the piano string iron plate of a feeding box are guaranteed to be smelted in the same electric furnace crucible during feeding, and when the smelting temperature reaches a standard temperature, slag generated during electric furnace smelting is cleaned and then is poured into a ladle (13) immediately;
step four, component inspection: further cleaning slag generated on the surface in the ladle (13), directly influencing the product quality of the piano string iron plate by the quality of the smelted raw materials, taking a ladle raw material sample by using an end hopper, analyzing the raw material proportion by using a stokehole rapid thermal analyzer (14), checking whether the requirement of the piano string iron plate is met, respectively pouring the ladle into a piano string iron plate sand mold, and taking the piano string iron plate out after cooling;
And step five, after the crucible is continuously used for several days, the electric furnace crucible forming material reaches the use upper limit, and the refractory material is constructed into the medium-frequency electric furnace induction coil crucible (10) by using an electric furnace building machine and an electric furnace induction coil furnace-pounding material lining die after being smashed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600873.6A CN113333723A (en) | 2021-05-31 | 2021-05-31 | System and method for smelting piano string iron plate cast medium-frequency electric furnace |
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| CN202110600873.6A CN113333723A (en) | 2021-05-31 | 2021-05-31 | System and method for smelting piano string iron plate cast medium-frequency electric furnace |
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| CN215002878U (en) * | 2021-05-31 | 2021-12-03 | 宜昌金宝乐器制造有限公司 | System is smelted to piano string iron plate casting intermediate frequency electric stove |
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| RU2661368C1 (en) * | 2017-09-01 | 2018-07-16 | Владимир Александрович Трусов | Induction crucible furnace |
| CN108534548A (en) * | 2018-05-15 | 2018-09-14 | 湖南申晖新材料股份有限公司 | A kind of modified silver founding intermediate frequency furnace apparatus |
| CN215002878U (en) * | 2021-05-31 | 2021-12-03 | 宜昌金宝乐器制造有限公司 | System is smelted to piano string iron plate casting intermediate frequency electric stove |
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