CN218755857U - Argon blowing control system of argon oxygen refining furnace - Google Patents
Argon blowing control system of argon oxygen refining furnace Download PDFInfo
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- CN218755857U CN218755857U CN202222761584.7U CN202222761584U CN218755857U CN 218755857 U CN218755857 U CN 218755857U CN 202222761584 U CN202222761584 U CN 202222761584U CN 218755857 U CN218755857 U CN 218755857U
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- argon
- argon gas
- carbon monoxide
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Abstract
The utility model discloses a belong to and smelt equipment technical field, specifically be an argon oxygen refining furnace blows argon gas control system, including argon gas jar, argon gas pipeline, manual control valve, filter, check valve, booster, end rifle, carbon monoxide concentration sensor and controller, carbon monoxide concentration sensor installs on exhaust pipe, carbon monoxide concentration sensor passes through the data line and is connected with the controller, the booster is connected on the argon gas pipeline, end rifle links to each other with the argon gas pipeline to install in argon oxygen refining furnace bottom. The controller converts the received carbon monoxide concentration value into the carbon content in the molten pool, automatically adjusts the booster according to the carbon content, changes the air pressure in the argon pipeline, blows high-pressure argon into the molten pool through the bottom gun, reduces the partial pressure of carbon monoxide in the molten pool, promotes smelting decarburization, and thus produces the low-carbon and micro-carbon ferrochrome.
Description
Technical Field
The utility model belongs to the smelting equipment field especially relates to an argon oxygen refining furnace blows argon gas control system.
Background
In the process of refining ferrochrome alloy by argon oxygen, the main chemical reactions in the molten pool are as follows:
C+O——>CO
2Cr+3O——>Cr2O3
3C+Cr2O3——>2Cr+3CO
as can be seen from the above chemical reactions, ferrochrome smelting is a competitive oxidation process of carbon and chromium. When the content of the carbon element is low, the carbon monoxide partial pressure in the molten pool is high, the carbon oxidation reaction is limited, and the decarburization is difficult. If the smelting temperature is kept unchanged, the carbon monoxide partial pressure in the molten pool is reduced to promote the carbon oxidation reaction and inhibit chromium from being oxidized. The existing argon oxygen refining furnace argon blowing system mainly controls the pressure of argon blowing by adjusting the opening of a valve on an argon pipeline, the maximum argon blowing pressure is the pressure of an argon tank, the argon blowing pressure of a high argon tank and the argon tank cannot be provided for a molten pool, and low-carbon and micro-carbon ferrochrome alloy is difficult to smelt. The utility model discloses aim at providing the bigger argon gas pressure that blows for the molten bath, further reduce the partial pressure of carbon monoxide in the molten bath, promote decarbonization speed to restrain the chromium oxidation, reach the purpose of decarbonization chromium protection, thereby produce low, little carbon ferrochrome smoothly.
SUMMERY OF THE UTILITY MODEL
The utility model provides an argon oxygen refining furnace blows argon gas control system, according to the numerical value automatically regulated supply argon gas pressure of carbon content in the molten bath, improve the pressure of blowing in molten bath argon gas through the booster, reduce the partial pressure of carbon monoxide in the molten bath effectively, promote the carbon by the oxidation, reduce the chromium simultaneously and by the oxidation, improve the decarbonization efficiency of concise chromium-iron alloy to produce low, little carbon chromium-iron alloy smoothly.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
The utility model provides an argon oxygen refining furnace blows argon gas control system includes the argon gas jar, the argon gas pipeline, manual regulation valve, a filter, the check valve, the booster, end rifle, carbon monoxide concentration sensor and controller, wherein end rifle is installed in the bottom of argon oxygen refining furnace, the argon gas jar passes through argon gas pipeline and end rifle intercommunication, the argon gas is blown into to the molten bath to end rifle in the smelting process, carbon monoxide concentration sensor installs on the exhaust pipe, detect the concentration of carbon monoxide in the flue gas, and transmit the data through the data line for the controller, the controller converts received carbon monoxide concentration numerical value into the carbon content in the molten bath, according to carbon content automatically regulated booster, blow in high-pressure argon gas to the molten bath by end rifle, reduce the partial pressure of carbon monoxide in the molten bath, promote carbon oxidation, thereby produce low smoothly, little carbon ferrochrome alloy.
The argon oxygen refining furnace argon blowing control steps provided by the utility model are as follows.
The first step, preparation work:
and starting a system power supply, setting a reference value of carbon content in the molten pool, and setting an initial pressure value of argon blowing by the bottom lance.
Step two, argon blowing pressure control:
smelting begins, the controller is started, carbon monoxide generated by decarburization reaction enters the smoke exhaust pipeline, the carbon monoxide concentration sensor detects the carbon monoxide concentration value in the smoke exhaust pipeline and transmits the carbon monoxide concentration value to the controller through a data line, the controller converts the received carbon monoxide concentration value into the carbon content value in the molten pool and compares the carbon content value with a set reference value, the supercharger is automatically adjusted, the carbon content in the molten pool is closer to a set value, the pressure of blowing in argon is higher, the partial pressure of carbon monoxide in the molten pool is reduced, and the decarburization reaction is promoted until the smelting is finished.
Step three, shutdown:
and when the smelting is finished, the controller closes the supercharger, stops blowing argon by the bottom gun, closes the power supply of the system, and controls the system to stop for next use by blowing argon.
The carbon monoxide concentration sensor, the manual regulating valve, the check valve, the filter and the controller all belong to universal equipment, and therefore specific models are not described in detail.
The utility model has the advantages that: the controller automatically adjusts the supercharger according to the carbon content value in the molten pool, improves the pressure of argon blowing, reduces the partial pressure of carbon monoxide in the molten pool, promotes carbon oxidation, and simultaneously reduces the oxidation of chromium, thereby smoothly producing the low-carbon and micro-carbon ferrochrome.
Drawings
FIG. 1 is a schematic structural view of an argon supply control system of an argon oxygen refining furnace.
The labels in FIG. 1 are as follows:
1. argon gas tank 2, argon gas pipeline 3, manual regulating valve 4, filter 5, check valve 6, booster
7. Bottom gun 8, carbon monoxide concentration sensor 9, controller 10, argon oxygen refining furnace 11, smoke exhaust pipeline
12. And a data line.
Detailed Description
The working process of the argon blowing control system of the argon oxygen refining furnace provided by the utility model will be explained with the attached figure 1.
The utility model provides an argon oxygen refining furnace blows argon gas control system includes argon gas jar 1, argon gas pipeline 2, manual regulation valve 3, filter 4, check valve 5, booster 6, end rifle 7, carbon monoxide concentration sensor 8 and controller 9, wherein end rifle 7 is installed in the bottom of argon oxygen refining furnace 10, argon gas jar 1 passes through argon gas pipeline 2 and end rifle 7 intercommunication, smelt in-process end rifle 7 and blow in argon gas to the molten bath, carbon monoxide concentration sensor 8 installs on exhaust pipe 11, detect the concentration of carbon monoxide in the flue gas, and transmit the data of will detecting for controller 9 through data line 12, controller 9 converts the carbon content in the molten bath into with received carbon monoxide concentration numerical value, according to carbon content automatically regulated booster 6, blow in high pressure argon gas by end rifle 7, reduce the partial pressure of carbon monoxide in the molten bath, promote the decarbonization reaction. The utility model takes the argon blowing control of the argon oxygen refining furnace in the process of smelting low-carbon ferrochrome alloy as an embodiment. The low-carbon ferrochrome is smelted by using a 5-ton capacity argon oxygen refining furnace, the diameter of a furnace body is 1.1m, and the height of an inner cavity of the furnace is 1.8m. The carbon content of the raw materials to be fed into the furnace is 8wt%, the chromium content is 65wt%, the smelting temperature is 1750 ℃, and the argon blowing pressure is controlled by the argon oxygen refining furnace argon blowing control system provided by the utility model.
The argon oxygen refining furnace argon blowing control steps provided by the utility model are as follows.
The first step, preparation work:
and starting a system power supply, setting the reference value of the carbon content in the molten pool to be 0.5wt%, and setting the initial pressure value of argon blowing of the bottom lance 7 to be 0.04MPa.
Step two, argon blowing pressure control:
the smelting begins, start controller 9, the carbon monoxide that the decarbonization reaction produced gets into exhaust pipe 11, carbon monoxide concentration sensor 8 detects the carbon monoxide concentration numerical value in exhaust pipe 11, and convey to controller 9 through data line 12, controller 9 converts the carbon monoxide concentration numerical value that receives into the carbon content numerical value in the molten bath, and compare with the reference value of settlement, automatically regulated booster 6, the carbon content in the molten bath is close to the setting value more, then the atmospheric pressure that adjusts argon gas pipeline 2 by booster 6 is bigger, reduce the partial pressure of carbon monoxide in the molten bath, promote the decarbonization reaction to go on, it finishes to smelt.
Step three, shutdown:
and when the smelting is finished, the controller 9 closes the supercharger 6, stops blowing argon by the bottom gun 7, closes the power supply of the system, and stops the argon blowing control system for next use.
The carbon monoxide concentration sensor 8, the manual cut-off valve 3, the filter 4, the check valve 5 and the controller 9 all belong to general equipment, and therefore the specific models are not described in detail.
Although the operation of the present invention has been described above using embodiments, equivalent mechanisms may be substituted for the components in the control system without departing from the scope of the present invention. The embodiments disclosed herein can be used in various combinations, and not all combinations are exhaustive for the purposes of space saving and resource saving. Accordingly, the present invention is not limited to the embodiments disclosed herein.
Claims (2)
1. The utility model provides an argon oxygen refining furnace blows argon gas control system which characterized by: argon oxygen refining furnace blows argon gas control system include argon gas jar (1), argon gas pipeline (2), manual regulation valve (3), filter (4), check valve (5), booster (6), end rifle (7), carbon monoxide concentration sensor (8) and controller (9), wherein end rifle (7) are installed in the bottom of argon oxygen refining furnace (10), argon gas jar (1) are through argon gas pipeline (2) and end rifle (7) intercommunication, smelting in-process end rifle (7) blows in argon gas to the molten bath, carbon monoxide concentration sensor (8) are installed on smoke exhaust pipe (11), detect the concentration of carbon monoxide in the flue gas, and transmit detection data for controller (9) through data line (12), carbon content in controller (9) convert received carbon monoxide concentration numerical value into the molten bath, according to carbon content automatically regulated booster (6), blow in high pressure argon gas to the molten bath by end rifle (7), reduce the partial pressure of carbon monoxide in the reduction, promote carbon oxidation.
2. The argon blowing control system of the argon oxygen refining furnace of claim 1, characterized in that: the pressure booster (6) can adjust the air pressure of the argon pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761584.7U CN218755857U (en) | 2022-10-20 | 2022-10-20 | Argon blowing control system of argon oxygen refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761584.7U CN218755857U (en) | 2022-10-20 | 2022-10-20 | Argon blowing control system of argon oxygen refining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218755857U true CN218755857U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222761584.7U Active CN218755857U (en) | 2022-10-20 | 2022-10-20 | Argon blowing control system of argon oxygen refining furnace |
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| CN (1) | CN218755857U (en) |
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2022
- 2022-10-20 CN CN202222761584.7U patent/CN218755857U/en active Active
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