CN101892356B - Argon blowing protection system - Google Patents

Argon blowing protection system Download PDF

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Publication number
CN101892356B
CN101892356B CN2010102323146A CN201010232314A CN101892356B CN 101892356 B CN101892356 B CN 101892356B CN 2010102323146 A CN2010102323146 A CN 2010102323146A CN 201010232314 A CN201010232314 A CN 201010232314A CN 101892356 B CN101892356 B CN 101892356B
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China
Prior art keywords
delivery conduit
argon
pressure
nitrogen
bracing frame
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Expired - Fee Related
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CN2010102323146A
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CN101892356A (en
Inventor
任彤
方杞清
陈亚文
张钰
董伟光
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China National Heavy Machinery Research Institute Co Ltd
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China National Heavy Machinery Research Institute Co Ltd
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Abstract

The invention relates to the technical field of external refining of molten steel, in particular to an argon blowing protection system for thread feeding during the external refining of molten steel. The argon blowing protection system is characterized in that an argon blowing protection valve station is divided into a compressed air or nitrogen delivery line and an argon delivery line, and the output ends of the two lines are connected with a nozzle of an argon blowing protection device through a connecting hose; the argon blowing protection device comprises the nozzle, an adjusting arm, an adjusting nut, a locking nut and a supporting frame; and the nozzle is fixedly connected with one end of the adjusting arm, while the other end of the adjusting arm is connected with the supporting frame through the adjusting nut and the locking nut. In the argon blowing protection system, the molten steel is not in contact with air during thread feeding so as to keep an inert gas atmosphere in the process of thread feeding and maintain that the nitrogen content in the molten steel is not increased during thread feeding; and the contact of the molten steel and the air can be separated so as to prevent the nitrogen in the air from being dissolved in the molten steel to generate adverse impact on the molten steel.

Description

Argon blowing protection system
Technical field
The present invention relates to molten steel furnace outer refining technology field, the argon blowing protection system when silk is fed in particularly a kind of molten steel external refining.
Background technology
Nitrogen in steel has reduced the performance of ferrous materials under specific situation.Owing to the existence of nitrogen, reduced toughness, welding property, the thermal stresses district toughness of steel, steel fragility is increased; Nitrogen can cause the continuously cast bloom cracking on the other hand, and therefore, some high-quality steel should strict control nitrogen content.
Wire feeder is the novel appts that plays process for making the nineties, is used for injecting the molten steel depths to alloy core wire with the quantity of suitable speed, setting, makes its even dispersion, reaches deoxidation, changes inclusion morphology, is tailored into the purpose of grading.At present, the wire feeder of being known is by the feeder of VFC or pneumatic control, and liner, guiding lifting gear are formed; Owing in order to improve the specific absorption of alloy, generally need take the technical process of steel ladle bottom argon blowing when feeding silk, make Boiling of Steel expose the top of the slag; Feed silk then, the alloy silk inserts in the molten steel with certain speed, fusing fully in molten steel; The alloy silk and the molten steel that feed molten steel simultaneously are violent anti-; Generation is splashed, and makes molten steel fully contact with airborne nitrogen and absorbs, thereby caused nitrogen content increase by the 3～5ppm in the molten steel.
In theory, RH vacuum refinement process has the denitrogenation ability.Because the velocity of diffusion of nitrogen is very slow, denitrogenation speed is also very slow but in fact; Under the situation that original nitrogen content is very low in steel, the denitrogenation of RH vacuum refinement process is a difficulty very, sometimes even because RH Vakuumkammer gas leakage or driving gas argon gas are impure nitrogen pick-up; Only in steel original nitrogen content than just having certain nitric efficiency under the condition with higher; Therefore, for producing utmost point low nitrogen steel, prevent the nitrogen pick-up of molten steel when the RH vacuum-treat.
Summary of the invention
The purpose of this invention is to provide a kind of argon blowing protection system when feeding silk, molten steel is disengaged with air when feeding silk, kept feeding atmosphere of inert gases in the silk process, kept that nitrogen content does not increase in the molten steel in feeding a process; Can separate contacting of molten steel and air, prevent that airborne nitrogen from fusing into molten steel it is produced adverse influence.
The technical solution adopted for the present invention to solve the technical problems is: design a kind of argon blowing protection system; It is characterized in that: blowing argon valve station is divided into pressurized air or nitrogen delivery conduit and argon gas delivery conduit, and the output terminal of two circuits all is connected with the nozzle of argon blowing protection device through hose.
Described argon blowing protection device is made up of nozzle, adjustment arm, adjustment nut, set nut, bracing frame, and nozzle is fixedly connected with an end of adjustment arm, and the other end of adjustment arm is connected with bracing frame through adjustment nut and set nut.
Described bracing frame is a circle, and the circular middle part home position of bracing frame forms 1 and can satisfy the manhole that silk thread passes through, and the bracing frame outer wall is distributed with 6 nozzles through 6 adjustment arms, and these 6 nozzles are pressed six five equilibrium uniform distribution at the bracing frame excircle.
Described bracing frame is oval, and the oval bifocal position of bracing frame forms two and enough satisfies the manhole that silk thread passes through, and the oval outer wall of bracing frame is distributed with 8 nozzles through 8 adjustment arms, and these 8 nozzles are equidistant uniform distribution outside bracing frame.
The output terminal of described pressurized air or nitrogen delivery conduit and argon gas delivery conduit all is connected with the input terminus of first pressure unit; First pressure unit is connected with the master control room electrical signal; The output terminal of first pressure unit is connected with manual valve, and manual valve is connected with nozzle through hose.
Described pressurized air or nitrogen delivery conduit are that pressurized air or nitrogen are connected with first tensimeter, first pneumavalve successively through pipeline, finally are connected with first pressure unit.
Described argon gas delivery conduit is that argon gas is connected with second tensimeter, second pressure unit, pneumatic adjusting valve, second pneumavalve successively through pipeline; Finally be connected with first pressure unit, second pressure unit all is connected with the master control room electrical signal with pneumatic adjusting valve.
Described first pneumavalve, second pneumavalve, pneumatic adjusting valve are connected with instrument air respectively.
When described pressurized air or the work of nitrogen delivery conduit; Open first pneumavalve; First tensimeter shows input terminus nitrogen or the pressurized air or the nitrogen gas pressure of pressurized air or nitrogen delivery conduit at the scene, can find out whether source of the gas is normal, and first pressure unit can detect the pressure signal of the output terminal of pressurized air or nitrogen delivery conduit; And pass to master control room, can find out whether pressurized air or the work of nitrogen delivery conduit is normal.
When described argon gas delivery conduit is worked; Open second pneumavalve; Second tensimeter can show the pressure of the input terminus argon gas of argon gas delivery conduit at the scene; Can find out whether source of the gas is normal, second pressure unit will detect the pressure signal transmission of argon gas input terminus and give master control room, and master control room can obtain the pressure of argon gas delivery conduit input terminus and output terminal from first pressure unit and second pressure unit respectively; Master control room can be on the basis of input terminus pressure; According to the aperture that concrete pressure demand is come through electrical signal regulating and controlling pneumatic adjusting valve, first pressure unit is given master control room through electric signal transmission after detecting output pressure, thereby the output flow of argon gas can be controlled in the suitable scope when blowing argon gas is protected.
The invention has the beneficial effects as follows, feed in the silk process at molten steel furnace external refining and avoid airborne nitrogen to fuse in the molten steel, the nitrogen content in the molten steel is increased; Also reduced simultaneously the possibility that oxygen level increases; When vacuum refinement, can reduce tap to tap time like this, make the whole process flow can be more smooth and easy, the tapping rate in the unit time be higher, can produce good economic benefit.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a layout n. of the present invention;
Fig. 2 is the synoptic diagram of argon blowing protection device of the present invention;
Fig. 3 is a nozzle distribution plan one of the present invention;
Fig. 4 is a nozzle distribution plan two of the present invention;
Fig. 5 is a blowing argon valve of the present invention station synoptic diagram.
Among the figure: 1, argon blowing protection device; 2, hose; 3, blowing argon valve station; 4, silk thread; 5, nozzle; 6, adjustment arm; 7, adjustment nut; 8, set nut; 9, bracing frame; 10, first tensimeter; 11, manual valve; 12, first pneumavalve; 13, first pressure unit; 14, second pneumavalve; 15, pneumatic adjusting valve; 16, second pressure unit; 17; Second tensimeter; 18, instrument air; 19, pressurized air or nitrogen; 20, argon gas.
Embodiment
Embodiment 1; As shown in Figure 1; Blowing argon valve station 3 is connected with argon blowing protection device 1 through hose 2, and shielding gas argon gas 20 gets into argon blowing protection device 1 through hose 2 then through 3 decompressions of blowing argon valve station, and argon blowing protection device 1 is positioned at molten steel face top; The silk thread 4 of wire feeder output is got in argon gas 20 atmosphere in the argon blowing protection device 1 by central position, argon blowing protection device 1 upper end; And finally be inserted in the molten steel, isolated molten steel and the molten steel that sputters contact with airborne nitrogenous fertilizer gas, can avoid nitrogen to fuse into molten steel the content of nitrogen element is increased.
Embodiment 2, and is as shown in Figure 2, and this argon blowing protection device 1 is made up of nozzle 5, adjustment arm 6, adjustment nut 7, set nut 8, bracing frame 9; Nozzle 5 is fixedly connected with an end of adjustment arm 6; The other end of adjustment arm 6 is connected with bracing frame 9 through adjustment nut 7 and set nut 8, and the level height of nozzle 5 is not higher than the level height of bracing frame 9 lowermost ends, and nozzle 5 is adjusted the jet face size through rotation adjustment nut 7; Rotation adjustment nut 7 moves up and down along bracing frame 9 outer walls; Adjust nut 7 drive adjustment arms 6 and move up and down, the adjustment of adjustment arm 6 height makes nozzle 5 eject argon gas 20 and obtains adjusting in the size of the rounded face of molten steel face formation, according to the wire feeding process requirement; Adjust to and to adjust nut 7 through set nut 8 behind the correct position and be fixed on bracing frame 9 outer walls, carry out blowing argon.
Embodiment 3; As shown in Figure 3; For the single line wire feeder, bracing frame 9 is circular, and the circular middle part home position of bracing frame 9 forms 1 and enough satisfies the manhole that silk thread 4 passes through; Bracing frame 9 outer walls are distributed with 6 nozzles 5 through 6 adjustment arms 6, and these 6 nozzles 5 are pressed six five equilibrium uniform distribution at bracing frame 9 excircles.
Embodiment 4; As shown in Figure 4, for the two-wire wire feeder, bracing frame 9 is oval; Ellipse two focal positions of bracing frame 9 form 2 and enough satisfy the manhole that silk thread 4 passes through; Can be applicable to simultaneously that two cocainine lines 4 are inserted in the molten steel simultaneously, bracing frame 9 oval outer walls are distributed with 8 nozzles 5 through 8 adjustment arms 6, and these 8 nozzles 5 are equidistant uniform distribution outside bracing frame 9.
Embodiment 5; As shown in Figure 5, blowing argon valve station 3 is divided into pressurized air or nitrogen delivery conduit and argon gas delivery conduit, and switching can be practiced thrift argon gas 20 mutually between the two; Article two, the output terminal of circuit all is connected with the input terminus of first pressure unit 13; First pressure unit 13 is connected with the master control room electrical signal, and first pressure unit 13 is given master control room with detected pressure signal transmission, and the output terminal of first pressure unit 13 is connected with a plurality of manual valves 11; The quantity of manual valve 11 is identical with the quantity of nozzle 5, and each manual valve 11 all connects with corresponding nozzle 5 through hose 2; When not feeding silk, launch pressurized air or nitrogen delivery conduit, close the argon gas delivery conduit, argon blowing protection device is purged, prevent spray nozzle clogging, simultaneously nozzle is cooled off; When feeding silk, closes compression air or nitrogen delivery conduit are opened the argon gas delivery conduit, carry out blowing argon.
To be pressurized air or nitrogen 19 be connected with first tensimeter 10, first pneumavalve 12 successively through pipeline for pressurized air or nitrogen delivery conduit; Finally be connected with first pressure unit 13; Pressurized air or nitrogen delivery conduit are through first pneumavalve, 12 control break-makes; When pressurized air or the work of nitrogen delivery conduit, open first pneumavalve, 12, the first tensimeters 10 and can show the input terminus pressurized air of pressurized air or nitrogen delivery conduit or the pressure of nitrogen 19 at the scene; Can find out whether source of the gas is normal; First pressure unit 13 can detect the pressure signal of the output terminal of pressurized air or nitrogen delivery conduit, and passes to master control room, can find out whether pressurized air or the work of nitrogen delivery conduit is normal.
To be argon gas 20 be connected with second tensimeter 17, second pressure unit 16, pneumatic adjusting valve 15, second pneumavalve 14 through pipeline to the argon gas delivery conduit successively; Finally be connected with first pressure unit 13; Second pressure unit 16 all is connected with the master control room electrical signal with pneumatic adjusting valve 15; The argon gas delivery conduit is controlled break-makes through second pneumavalve 14, and carries out pressure through pneumatic adjusting valve 15 according to required Argon pressure and regulate, when the argon gas delivery conduit is worked; Open second pneumavalve 14; Second tensimeter 17 can show the pressure of the input terminus argon gas 20 of argon gas delivery conduit at the scene, can find out whether source of the gas is normal, and second pressure unit 16 will detect the pressure signal transmission of argon gas 20 input terminuss and give master control room; Master control room can obtain the pressure of argon gas delivery conduit input terminus and output terminal from first pressure unit 13 and second pressure unit 16 respectively; Master control room can be on the basis of input terminus pressure, and according to the aperture of concrete pressure demand through electrical signal regulating and controlling pneumatic adjusting valve 15, the pressure of the different outputs of aperture is just different; Output pressure detects the back through first pressure unit 13 and gives master control room through electric signal transmission, thereby the output flow of argon gas can be controlled in the suitable scope when blowing argon gas is protected.
First pneumavalve 12, second pneumavalve 14, pneumatic adjusting valve 15 are connected with instrument air 18 respectively, and instrument air 18 provides the control source of the gas for first pneumavalve 12 in the blowing argon valve station, second pneumavalve 14, pneumatic adjusting valve 15.
When not feeding silk, second pneumavalve 14 all to cut out with pneumatic adjusting valve 15, argon gas cuts off, and first pneumavalve 12 is opened simultaneously, and 19 pairs of argon blowing protection device of pressurized air or nitrogen purge, and prevent spray nozzle clogging, simultaneously nozzle 5 are cooled off; When feeding the silk beginning, first pneumavalve 12 cuts out, and pressurized air or nitrogen 19 cut off, and open second pneumavalve 14 and pneumatic adjusting valve 15 simultaneously, regulate through pneumatic adjusting valve 6 according to required Argon pressure.

Claims (5)

1. blowing argon equipment, it is characterized in that: blowing argon valve station (3) is divided into pressurized air or nitrogen delivery conduit and argon gas delivery conduit, and the output terminal of two circuits all is connected with the nozzle (5) of argon blowing protection device (1) through hose (2); Described argon blowing protection device (1) is made up of nozzle (5), adjustment arm (6), adjustment nut (7), set nut (8), bracing frame (9); Nozzle (5) is fixedly connected with an end of adjustment arm (6), and the other end of adjustment arm (6) is connected with bracing frame (9) through adjustment nut (7) and set nut (8); The output terminal of described pressurized air or nitrogen delivery conduit and argon gas delivery conduit all is connected with the input terminus of first pressure unit (13); First pressure unit (13) is connected with the master control room electrical signal; The output terminal of first pressure unit (13) is connected with manual valve (11), and manual valve (11) is connected with nozzle (5) through hose (2); Described pressurized air or nitrogen delivery conduit are that pressurized air or nitrogen (19) are connected with first tensimeter (10), first pneumavalve (12) successively through pipeline, finally are connected with first pressure unit (13); Described argon gas delivery conduit is that argon gas (20) is connected with second tensimeter (17), second pressure unit (16), pneumatic adjusting valve (15), second pneumavalve (14) successively through pipeline; Finally be connected with first pressure unit (13), second pressure unit (16) all is connected with the master control room electrical signal with pneumatic adjusting valve (15); Described first pneumavalve (12), second pneumavalve (14), pneumatic adjusting valve (15) are connected with instrument air (18) respectively.
2. blowing argon equipment according to claim 1; It is characterized in that: described bracing frame (9) is for circular; The circular middle part home position of bracing frame (9) forms 1 and can satisfy the manhole that silk thread (4) passes through; Bracing frame (9) outer wall is distributed with 6 nozzles (5) through 6 adjustment arms (6), and these 6 nozzles (5) are pressed six five equilibrium uniform distribution at bracing frame (9) excircle.
3. blowing argon equipment according to claim 1; It is characterized in that: described bracing frame (9) is for oval; The oval bifocal position of bracing frame (9) forms 2 and enough satisfies the manhole that silk thread (4) passes through; The oval outer wall of bracing frame (9) is distributed with 8 nozzles (5) through 8 adjustment arms (6), and these 8 nozzles (5) are equidistant uniform distribution outside bracing frame (9).
4. blowing argon equipment according to claim 1; It is characterized in that: described pressurized air or nitrogen delivery conduit; During work, open first pneumavalve (12), first tensimeter (10) shows the input terminus nitrogen of pressurized air or nitrogen delivery conduit or the pressure of pressurized air (19) at the scene; Find out whether source of the gas is normal; First pressure unit (13) detects the pressure signal of the output terminal of pressurized air or nitrogen delivery conduit, and passes to master control room, finds out whether pressurized air or the work of nitrogen delivery conduit is normal.
5. blowing argon equipment according to claim 1; It is characterized in that: described argon gas delivery conduit; During work; Open second pneumavalve (14), second tensimeter (17) shows the pressure of the input terminus argon gas (20) of argon gas delivery conduit at the scene, finds out whether source of the gas is normal; Second pressure unit (16) will detect the pressure signal transmission of argon gas (20) input terminus and give master control room; Master control room can obtain the pressure of argon gas delivery conduit input terminus and output terminal from first pressure unit (13) and second pressure unit (16) respectively, and master control room can be on the basis of input terminus pressure, the aperture of coming through electrical signal regulating and controlling pneumatic adjusting valve (15) according to concrete pressure demand; First pressure unit (13) is given master control room through electric signal transmission after detecting output pressure, thereby the output flow of argon gas can be controlled in the suitable scope when blowing argon gas is protected.
CN2010102323146A 2010-07-21 2010-07-21 Argon blowing protection system Expired - Fee Related CN101892356B (en)

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Publication number Priority date Publication date Assignee Title
CN104060046B (en) * 2014-07-04 2016-03-09 武汉钢铁(集团)公司 A kind of calcium line feeding method prevented in the nitrogen pick-up of argon station
CN106086304B (en) * 2016-08-02 2018-11-06 芜湖新兴铸管有限责任公司 The threads feeding apparatus of RH refining furnaces and hello silk method
CN116135997A (en) * 2021-11-16 2023-05-19 宝山钢铁股份有限公司 Air blowing deoxidizing device and method for non-vacuum induction furnace top

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US3866806A (en) * 1973-03-01 1975-02-18 United States Steel Corp Operating mechanism for slidable gates and method of operating slide gate
FR2501722B1 (en) * 1981-03-11 1986-08-14 Siderurgie Fse Inst Rech PROCESS FOR THE PNEUMATIC BREWING OF A METAL BATH
US4705261A (en) * 1986-11-28 1987-11-10 Pfizer Inc. Wire injection nozzle
FR2607829A1 (en) * 1986-12-09 1988-06-10 Cootec Deutschland Gmbh Process for the treatment of steel in a ladle
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CN101168817B (en) * 2006-10-25 2010-10-13 宝山钢铁股份有限公司 Method for increasing nitrogen content of nitrogen-containing clean steel

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Address after: 710032 Shaanxi city in Xi'an province Xin Jiamiao East yuan Road No. 209 Chinese Heavy Machinery Research Institute Co. Ltd.

Patentee after: China National Heavy Machinery Research Institute Co., Ltd.

Address before: 710032 Shaanxi city in Xi'an province Xin Jiamiao East yuan Road No. 209 Chinese Heavy Machinery Research Institute Co. Ltd.

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CF01 Termination of patent right due to non-payment of annual fee