CN202359141U - Gas protection device for reducing nitrogen absorption of molten steel - Google Patents
Gas protection device for reducing nitrogen absorption of molten steel Download PDFInfo
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- CN202359141U CN202359141U CN2011204029867U CN201120402986U CN202359141U CN 202359141 U CN202359141 U CN 202359141U CN 2011204029867 U CN2011204029867 U CN 2011204029867U CN 201120402986 U CN201120402986 U CN 201120402986U CN 202359141 U CN202359141 U CN 202359141U
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- molten steel
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- steel
- nitrogen
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Abstract
The utility model relates to a gas protection device for reducing nitrogen absorption of molten steel and belongs to auxiliary production facilities of metallurgy enterprises. The gas protection device is composed of a support, a refractory material, a gas blowing device and a connecting piece, wherein the support is formed by welding high-temperature-resistant steel pipes; in the support, a drum is enclosed by the lightweight refractory material; gas blowing pipes are spirally arranged on the support; gas blowing holes are arranged on the gas blowing pipes; and the connecting piece is installed at one end of the support, wherein the connecting piece and a furnace body are fixed. According to the utility model, the connecting piece and the furnace body are tightly connected; when the molten steel is transferred to a ladle from a smelting furnace, the protective gas is ejected from the gas blowing pipes through the gas blowing holes, so as to form a thin protective gas layer on the surface of steel flow; and the protective gas layer isolates the contact between the molten steel and air, so that the reaction area between the molten steel and nitrogen in the air is reduced, the content of nitrogen in the molten steel is reduced and the quality of a steel product is improved.
Description
Technical field:
The utility model belongs to smelter production off-set facility, relates to a kind of gas shield device that molten steel is inhaled nitrogen that reduces.
Background technology:
The ferrite stainless smelting steel adopts the technical process of furnace → refining furnace → continuous casting (die casting) just usually; In the transfer process of molten steel between each flow process; To contact with air and with gas reactions such as airborne nitrogen, oxygen, cause the content of the elements such as nitrogen, oxygen in the molten steel to increase.
Nitrogen, oxygen element have bigger harm to steel quality; Especially bigger to the ferritic stainless steel harm that contains chromium; Because nitrogen strong the formation and stable austenite that be a kind of interstitial element, and the velocity of diffusion of nitrogen element in ferritic stainless steel is fast, and in heat postcooling process, has nitrides precipitate and separate out; Cause ferritic stainless steel high-temperature brittleness, room temperature toughness low, that temperature limit of brittleness changes is high, to shortcomings such as breach sensitivities.
Metallurgical work is devoted to reduce nitrogen in steel content, the nitrogen content in the ferritic stainless steel especially always.Contain alloying elements such as a large amount of chromium, molybdenum in the ferritic steel; And the binding ability of this dvielement and nitrogen is very strong, if having a large amount of nitrogen in the steel, is difficult in the molten steel smelting process remove; Therefore, it is extremely important to the ferrite stainless smelting steel to reduce molten steel nitrogen pick-up in smelting process.
Summary of the invention:
React with airborne nitrogen in transfer process in order to reduce the ferrite stainless molten steel, reduce the nitrogen content in the ferrite stainless molten steel, the utility model provides a kind of gas shield device that molten steel is inhaled nitrogen that reduces.
The utility model is made up of support, refractory materials, blowing device, web member; Support adopts the high temperaturesteel sealing of tube; The support inboard is provided with refractory materials, and refractory materials surrounds tubular and covers support, at the peripheral spiral of support gas blow pipe is set; Gas hole is set on gas blow pipe, is used for the web member that is connected with body of heater in the installation of support one end.
The web member of the utility model closely is connected with body of heater; When ladle shifted, shielding gas was sprayed through gas hole by gas blow pipe molten steel by smelting furnace, formed the very thin shielding gas layer of one deck on steel stream surface; This shielding gas layer has completely cut off contacting of molten steel and air; Reduce nitrogen reaction area in molten steel and the air, reduced the nitrogen content in the molten steel, improved the quality of steel.
Description of drawings:
Fig. 1 is the structure iron of the utility model embodiment.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Among the figure: 1-support, 2-gas blow pipe, 3-heat-resistant light refractory materials, 4-gas hole, 5-web member, 6-gas communication port.
Embodiment:
Embodiment: Fig. 1, Fig. 2, shown in Figure 3, present embodiment by the support 1 of high temperaturesteel sealing of tube, gas blow pipe 2, heat-resistant light refractory materials 3, gas hole 4, be fixedly coupled part 5 with body of heater, connect gas port and form.High temperaturesteel tube support 1 is cylindrical by some annular steel pipes and the some straight steel pipes profile that is welded; Peripheral disposition at support 1 has gas blow pipe 2; The rounded horizontal arrangement in gas blow pipe 2 support bottoms is provided with shielding gas communication port 6 at an end of gas blow pipe 2, and gas blow pipe 2 is arranged along the steel pipe support direction twist; And the identical distance in interval is evenly arranged gas hole 4 on gas blow pipe; Protect at the support 1 inboard heat-resistant light refractory materials 3 that adopts, heat-resistant light refractory materials 3 covers supports 1, and the splash of control molten steel is to support.Web member 5 is annular steel part.
Claims (1)
1. one kind is reduced the gas shield device that molten steel is inhaled nitrogen
,It is characterized in that forming by support, refractory materials, blowing device, web member; Support adopts the high temperaturesteel sealing of tube; The support inboard is provided with refractory materials, and refractory materials surrounds tubular and covers support, at the peripheral spiral of support gas blow pipe is set; Gas hole is set on gas blow pipe, is used for the web member that is connected with body of heater in the installation of support one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204029867U CN202359141U (en) | 2011-10-21 | 2011-10-21 | Gas protection device for reducing nitrogen absorption of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204029867U CN202359141U (en) | 2011-10-21 | 2011-10-21 | Gas protection device for reducing nitrogen absorption of molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202359141U true CN202359141U (en) | 2012-08-01 |
Family
ID=46570344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204029867U Expired - Fee Related CN202359141U (en) | 2011-10-21 | 2011-10-21 | Gas protection device for reducing nitrogen absorption of molten steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202359141U (en) |
-
2011
- 2011-10-21 CN CN2011204029867U patent/CN202359141U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20161021 |