CN1330777C - Water cooling structure of converter oxygen gun - Google Patents
Water cooling structure of converter oxygen gun Download PDFInfo
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- CN1330777C CN1330777C CNB2005100872129A CN200510087212A CN1330777C CN 1330777 C CN1330777 C CN 1330777C CN B2005100872129 A CNB2005100872129 A CN B2005100872129A CN 200510087212 A CN200510087212 A CN 200510087212A CN 1330777 C CN1330777 C CN 1330777C
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Abstract
The present invention provides a water cooling structure of an oxygen gun used for converter steel production, which belongs to the technical field of an oxygen gun used for a converter. The water cooling structure comprises a water input pipeline and a gun body of the oxygen gun and is connected by a soft pipe, wherein the water input pipeline comprises a water input expanding pipe (3), a water input bend pipe (4), a water output bend pipe (8), a water output contraction pipe (9), a special-shaped water holding piece (12) and a water cooling guiding circular seam (13); the gun body of the oxygen gun comprises an oxygen pipe (1), an outer pipe (2) of the oxygen gun, a quick joint (5), a spray head (6) of the oxygen gun, a quick joint (7), an intermediate pipe of the oxygen gun, an outer pipe sleeve (11), a stainless steel pipe (14) connected with the oxygen gun, a stainless steel rotary outer sleeve (15), a round rubber packing (16) and a stainless steel pipe (17) connected with a metal soft pipe; the special-shaped water holding piece (12) is arranged between the inside of the spray head (6) of the oxygen gun and the outside of an oxygen spray hole. The present invention has the advantages of easy manufacture, difficult burn of the spray head, obvious improvement of an oxygen carbon gun, simplifies an operating program and saves loading and unloading time.
Description
Technical field
The invention belongs to coverter pig oxygen rifle technical field, a kind of water cooling plant of converter oxygen gun is provided especially.
Background technology
The oxygen rifle is the indispensable device of converter steelmaking, and every technical indicator of converter steelmaking process is had consequence and decisive role.Since the LD converter is come out, the oxygen rifle has been carried out continuous development, improved, the oxygen lance blow head in past has been become porous from single hole, be modified into the monoblock casting shower nozzle, greatly advanced the development of converter technology by forging shower nozzle.China's oxygen rifle development develops cardinal principle with synchronously external, and three holes, four holes, porous oxygen rifle are popularized, and the monoblock casting shower nozzle generally adopts at convertor steelmaking process.
The oxygen lance blow head that is used for converter smelting, very high heat load is born in its bottom, and its numerical value is 2.72 * 10
6～3.60 * 10
6KJ/ (m
2H).And the sidewall affected by hot loading is very little, only has 0.014 * 10
6KJ/ (m
2H), be equivalent to 1/200 of bottom.Therefore the cooling of shower nozzle is actually the cooling to the bottom.After adopting three holes, four holes, five holes, six hole shower nozzles, run into certain trouble on cooling and the structure treatment, if still prolong with forging the nozzle structure form, more serious " eating nose " phenomenon then can take place, use the assembly welding structure instead, " eat nose " though phenomenon is resolved, because the influence of receiving end back welding seam, the life-span is lower.Therefore, steel-making converter extensively adopts center water cooling casting shower nozzle.Because updating of casting technique and structure, there has been large increase in the life-span, but increase rate still is subjected to the restriction of nozzle end bottom structure and current tissue quality.A project organization is reasonable, and the current tissue is appropriate, makes the second best in quality shower nozzle, and its life-span can reach 500～600 stoves, and the general shower nozzle life-span has only about 300 stoves poor less than 100 stoves.
In addition, the oxygen gun water-cooling system is made up of hydraulic pipe-line, hose connection and oxygen gun body, yet the water coolant drag losses more than 80% concentrates on the oxygen rifle, particularly at the connecting portion of oxygen rifle Inlet and outlet water.
Summary of the invention
The object of the present invention is to provide a kind of water cooling plant of converter oxygen gun, solved water coolant drag losses more than 80% and concentrated on problem on the oxygen rifle, increased the water-cooled effect, prolonged the shower nozzle life-span.Forge shower nozzle owing to position between the hole can not be cooled off in water flowing, so in use it will be quickly by corrode, thereby performance is bad, and the life-span is shorter.In order thoroughly to solve the water-cooled problem at position between the shower nozzle hole, in three holes, the center water flowing refrigerative structure of four holes or five hole porous casting shower nozzles must make each position of shower nozzle (mainly being the centre) all have enough water-cooled intensity, also make different sites have different water coolant flow velocitys simultaneously, the position water speed of for example intaking can be selected lowlyer slightly, be 2.5～5.0m/s, to reduce drag losses, backwater position water speed then will improve, be 5.0～10.0m/s, to increase the water-cooled effect.No matter which kind of oxygen rifle all is provided with pocket water plate at present, it is correctly to organize current to prevent the very crucial measure that shower nozzle burns out.
The water-cooling structure that the present invention adopts comprises: hydraulic pipe-line and oxygen gun body, use hose connection.Hydraulic pipe-line comprises: water inlet convergent divergent channel 3, water inlet bend pipe 4, Discharging bent-tube 8, water outlet collapsible tube 9, special-shaped water holding tablet 12, water-cooled guiding circumferential weld 13; Oxygen gun body comprises: oxygen pipe 1, oxygen rifle outer tube 2, rapid-acting coupling 5, oxygen lance blow head 6, rapid-acting coupling 7, oxygen rifle intervalve 10, outer tube 11, the stainless steel tube 14 that is connected with the oxygen rifle, stainless steel rotary sleeve 15, round rubber gasket 16, the stainless steel tube 17 that is connected with metallic hose.
The special-shaped water holding tablet 12 (as Fig. 2) that the present invention adopts places between the outside of the inboard of oxygen lance blow head 6 and oxygen spray orifice, and use electrolytic copper to be material, monoblock casting forms, the abundant guiding center of current, pocket water sheet 12 is the bottom suitably, so that cause the high velocity flow of whole end face.Initial flow velocity is that 6m/s. mensuration inner-wall surface temperature is 105 ℃, causes water ebullient possibility but still have, and uses 10m/s afterwards instead, and wall surface temperature has only 35 ℃, has approached the current temperature.Water diversing sheet places the oxygen hole circle post outside, is the special-shaped plates that make the water coolant shunting.Water eliminator is a baffle that makes the water bias current between shower nozzle entrance of cooling water and outlet.It surrounds the centre channel that water coolant flows through between the oxygen hole, its inner rim surround one quincunx, oxygen gun cooling water is therefrom flow through.The water conservancy diversion water diversing sheet is sent into the shower nozzle centre with 4/5 of water coolant by water eliminator, and remaining 1/5 is sent into the outer root of oxygen post by it, eliminates slough there.Therefore, the cooling of the shower nozzle of this structure is fabulous, is not easy to burn out, and the life-span of oxygen lance of being made by it forges the much longer of shower nozzle.
The present invention is on the position of oxygen rifle Inlet and outlet water, oxygen rifle outer tube 2 outsides are increased an outer tube 11, big 5～the 20mm of radius ratio oxygen rifle outer tube of outer tube, water inlet bend pipe 4 is processed into gradually the convergent divergent channel 3 that amplifies (flare angle is 5～45 degree) with the connection section of oxygen rifle intervalve 10, and rapid-acting coupling 7 is processed into gradually the collapsible tube 9 of diminish (angle of throat is 5～45 degree) with the connection section of oxygen rifle outer tube 11.Under the condition of identical cooling water pressure, adopt this method, the flow of water coolant can be increased by 10～38%, increase substantially the cooling performance of oxygen rifle.
The cooling water intakeoutfall that the rapid-acting coupling 5,7 that the present invention adopts can be applicable to the small vessel oxygen rifle about 30 tons has replaced habitual flange connection with on oxygen inlet is connected.The interior overcoat of rapid-acting coupling 5,7 adopts the stainless steel casting to form, and loading and unloading can tighten or unscrew by simple tools.Unscrew stainless steel rotary sleeve 15 and can remove the stainless steel tube 17 that is connected with metallic hose simply.The stainless steel tube that will be connected with metallic hose is inserted on the tape, tightens the stainless steel rotary sleeve then, can finish assembling, and compressing round rubber gasket 16 made its distortion reach sealing and fixed effect when the stainless steel rotary sleeve was tightened.When not connecting, the stainless steel rotary sleeve can hang over the Inlet and outlet water joint of oxygen rifle.
Principle of design of the present invention is: three layers of concentric tubes forming the oxygen rifle must be able to stretch in oxygen rifle assembling process, guarantee the cutting or the welding of oxygen lance blow head and rifle body, are convenient to the assembling and the replacing of shower nozzle.The oxygen rifle will guarantee in use can eliminate the internal stress of outer tube because of expanding with heat and contract with cold the two-layer steel tube place in the inside being produced.The oxygen rifle produces a large amount of heats because oxygenizement takes place in converting process, make envrionment temperature up to more than 2500 ℃, although the high pressure water cooling is arranged in the rifle body, the surface temperature of oxygen rifle outer tube still reaches more than 500 ℃, makes its heat expansion elongation of being heated.Actual measurement shows that the oxygen rifle of a useful length 4.73m in use outer tube can extend 32mm, yet the two-layer pipe in the oxygen rifle is owing to be subjected to the abundant cooling of high pressure water, and its temperature does not almost change, thereby can not extend.As not taking measures, will produce very big stress in the rifle body; Otherwise because the outer tube cooling is shunk, the rifle body produces a very big tensile stress again when carrying rifle.If the Compound Steel pipe of oxygen rifle is welded dead or is fixing dead, because rifle body internal stress constantly acts on, will crack and fatigure failure in the weak link of rifle body (normally rifle body be connected copper steel commissure) with shower nozzle, the oxygen rifle is out of shape or the commissure leaks.Therefore, the oxygen gun body of designing must guarantee the oxygen rifle in outer tube elongation or when shrinking, and the intravital two layers of steel pipe of rifle also can correspondingly shrink, but also must guarantee that high pressure water and high pressure oxygen do not gang up and seepage between the Compound Steel pipe mutually.
Protection shower nozzle and rifle body are not damaged, and enough water yields and flow velocity must be arranged, and how to determine the water yield and the correct flow velocity of selecting, and are the keys of oxygen gun water-cooling structure.Estimate the water yield, flow velocity correctness, mainly see the internal surface temperature of copper wall water flowing side.Can reach 1080～1090 ℃ under the situation burning out. when temperature reaches 530～550 ℃, just can obviously reduce the structural strength of shower nozzle, cause bigger deformation, therefore should control inboard temperature is no more than 120 ℃.Reduce wall surface temperature with the increase water yield and help water temperature to change, and work as the thermal load at shower nozzle place above 3.6 * 10
6KJ/ (m
2H) time, changing for the water temperature of the 6500L/min water yield influences wall surface temperature hardly.Therefore, pursuing low leaving water temperature(LWT) has little significance.Research thinks that the water layer thickness of laminar region, wall place is depended in the cooling of copper wall by experiment.If reduce this district's thickness, flow velocity must height.Therefore improving flow velocity, is the important channel of reducing water content consumption.Design current velocity is generally more than 9.14m/s.Japan thinks that high flow rate is mainly used in the cooling spray end face, and the side surface and the body of a gun obviously reduce (only 0.0269 * 10 because of thermal load
6KJ/ (m
2H)), can adopt lower flow velocity, for example 300t converter of Nippon Steel's design, oxygen rifle water intake velocity is 2.5m/s, going out water speed is 4.0m/s.Can significantly reduce the operating pressure of water like this.Initial oxygen rifle end is not provided with pocket water plate, and the direct back skin of most of current flows to the water shortage 30～40% of end face, and this sharply descends water speed even to zero, and the stagnant wake occurs.According to field measurement, actual water speed generally has only 1.1～1.5m/s, and some places have only 0.7～0.8m/s.The shower nozzle life-span is very short, leaks through the interface locations of being everlasting between each spray orifice. and model research finds that when flow velocity was lower than 0.7m/s, almost moment can burn out the copper wall.
The invention has the advantages that:
1, need not change original oxygen rifle machinery equipment, lifting device;
2, oxygen lance blow head partly adopts the method that makes the current bifurcated rational in infrastructure, has solved the water-cooled problem at position between the shower nozzle hole, makes not easy burn-out of shower nozzle;
3, adopt the mode that adds telescopic water coolant Inlet and outlet water, increase substantially the cooling performance of oxygen rifle;
4, adopt shower nozzle head fine copper to cast the complex method that is connected with the rear portion steel part, make and guarantee the working accuracy of shower nozzle easily, improved cooling performance, the life-span of oxygen carbon rifle is obviously improved.
5, adopt rapid-acting coupling at the cooling water intakeoutfall place, simplified schedule of operation, saved the loadingunloading time.
Description of drawings
Fig. 1 is the synoptic diagram of converter steelmaking with the oxygen rifle.Wherein, oxygen pipe 1, oxygen rifle outer tube 2, water inlet convergent divergent channel 3, water inlet bend pipe 4, rapid-acting coupling 5, oxygen lance blow head 6, rapid-acting coupling 7, Discharging bent-tube 8, water outlet collapsible tube 9, oxygen rifle intervalve 10, outer tube 11.
Fig. 2 is the longitudinal section structural map of converter steelmaking with oxygen lance blow head.Wherein, special-shaped water holding tablet 12, water-cooled guiding circumferential weld 13.
Fig. 3 is the method for design synoptic diagram of entrance of cooling water and outlet.
Fig. 4 is the synoptic diagram of oxygen gun cooling water with rapid-acting coupling.Wherein, the stainless steel tube 14 that is connected with the oxygen rifle, stainless steel rotary sleeve 15, round rubber gasket 16, the stainless steel tube 17 that is connected with metallic hose.
Embodiment
Fig. 1 is a kind of embodiment of the present invention to Fig. 4, and its water-cooling structure comprises hydraulic pipe-line and oxygen gun body, uses hose connection.
The present invention adopts special-shaped water holding tablet shown in Figure 2 12 shapes, so that the abundant guiding center of current, the pocket water sheet 12 suitable bottoms are so that cause the high velocity flow of whole end face.Initial flow velocity is that 6m/s. mensuration inner-wall surface temperature is 105 ℃, causes water ebullient possibility but still have, and uses 10m/s afterwards instead, and wall surface temperature has only 35 ℃, has approached the current temperature.Water diversing sheet places the oxygen hole circle post outside, is the special-shaped plates that make the water coolant shunting.Water eliminator is a baffle that makes the water bias current between shower nozzle entrance of cooling water and outlet.It surrounds the centre channel that water coolant flows through between the oxygen hole, its inner rim surround one quincunx, oxygen gun cooling water is therefrom flow through.The water conservancy diversion water diversing sheet is sent into the shower nozzle centre with 4/5 of water coolant by water eliminator, and remaining 1/5 is sent into the outer root of oxygen post by it, eliminates slough there.
On the position of oxygen rifle Inlet and outlet water, oxygen rifle outer tube 2 outsides are increased an outer tube 11, big 5～the 20mm of radius ratio oxygen rifle outer tube of outer tube, water inlet bend pipe 4 is processed into gradually the convergent divergent channel 3 that amplifies (flare angle is 5～45 degree) with the connection section of oxygen rifle intervalve 10, and rising pipe 7 is processed into gradually the collapsible tube 9 of diminish (angle of throat is 5～45 degree) with the connection section of oxygen rifle outer tube 11.
The present invention uses rapid-acting coupling 5,7 to replace habitual flange to connect.The interior overcoat of rapid-acting coupling 5,7 adopts the stainless steel casting to form, and loading and unloading can tighten or unscrew by simple tools.Unscrew stainless steel rotary sleeve 15 and can remove the stainless steel tube 17 that is connected with metallic hose simply.The stainless steel tube that will be connected with metallic hose is inserted on the tape, tightens the stainless steel rotary sleeve then, can finish assembling, and compressing round rubber gasket 16 made its distortion reach sealing and fixed effect when the stainless steel rotary sleeve was tightened.When not connecting, the stainless steel rotary sleeve can hang over the Inlet and outlet water joint of oxygen rifle.
Claims (4)
1. a converter steelmaking is with the water cooling plant of oxygen rifle, and it is characterized in that: this device comprises hydraulic pipe-line and oxygen gun body, uses hose connection; Hydraulic pipe-line comprises into water convergent divergent channel (3), water inlet bend pipe (4), Discharging bent-tube (8), water outlet collapsible tube (9), special-shaped water holding tablet (12), water-cooled guiding circumferential weld (13), and oxygen gun body comprises oxygen pipe (1), oxygen rifle outer tube (2), rapid-acting coupling (5), oxygen lance blow head (6), rapid-acting coupling (7), oxygen rifle intervalve (10), outer tube (11), the stainless steel tube (14) that is connected with the oxygen rifle, stainless steel rotary sleeve (15), round rubber gasket (16), the stainless steel tube (17) that is connected with metallic hose; Special-shaped pocket water sheet (12) places between the outside of the inboard of oxygen lance blow head (6) and oxygen spray orifice, the abundant guiding center of current, water diversing sheet places the oxygen hole circle post outside, be the special-shaped plates that make the water coolant shunting, water eliminator is between shower nozzle entrance of cooling water and outlet, it is a baffle that makes the water bias current, it surrounds the centre channel that water coolant flows through between the oxygen hole, its inner rim surround one quincunx, oxygen gun cooling water is therefrom flow through, the water conservancy diversion water diversing sheet is sent into the shower nozzle centre with 4/5 of water coolant by water eliminator, and remaining 1/5 is sent into the outer root of oxygen post by it, eliminates slough there.
2. according to the described water cooling plant of claim 1, it is characterized in that: on the position of oxygen rifle Inlet and outlet water, oxygen rifle outer tube (2) limit is increased an outer tube (11), big 5～the 20mm of radius ratio oxygen rifle outer tube of outer tube, water inlet bend pipe (4) is processed into the convergent divergent channel (3) that amplifies gradually with the connection section of oxygen rifle intervalve (10), flare angle is 5～45 degree, and the connection section of rapid-acting coupling (7) and oxygen rifle outer tube (11) is processed into the collapsible tube (9) that diminishes gradually, and angle of throat is 5～45 degree.
3. according to the described water cooling plant of claim 1, it is characterized in that: rapid-acting coupling (5), (7) replaced habitual flange to connect, the cooling water intakeoutfall that is applied in the small vessel oxygen rifle about 30 tons is with on oxygen inlet is connected, rapid-acting coupling (5), (7) interior overcoat adopts the stainless steel casting to form, loading and unloading are tightened or are unscrewed by simple tools, unscrew stainless steel rotary sleeve (15) and remove the stainless steel tube (17) that is connected with metallic hose simply, the stainless steel tube that will be connected with metallic hose is inserted on the tape, tighten the stainless steel rotary sleeve then, finish assembling, compressing round rubber gasket (16) when the stainless steel rotary sleeve is tightened makes its distortion reach sealing and fixed effect.
4, according to the described water cooling plant of claim 1, it is characterized in that: special-shaped pocket water sheet (12), use electrolytic copper to be material, monoblock casting forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100872129A CN1330777C (en) | 2005-07-28 | 2005-07-28 | Water cooling structure of converter oxygen gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100872129A CN1330777C (en) | 2005-07-28 | 2005-07-28 | Water cooling structure of converter oxygen gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1718758A CN1718758A (en) | 2006-01-11 |
| CN1330777C true CN1330777C (en) | 2007-08-08 |
Family
ID=35930706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100872129A Expired - Fee Related CN1330777C (en) | 2005-07-28 | 2005-07-28 | Water cooling structure of converter oxygen gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1330777C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6733812B2 (en) * | 2017-04-13 | 2020-08-05 | 日本製鉄株式会社 | Water cooled lance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4190238A (en) * | 1978-05-11 | 1980-02-26 | Stahlwerke Peine-Salzgitter Ag | Lance head for a fining lance |
| CN2171599Y (en) * | 1993-06-28 | 1994-07-13 | 冶金工业部鞍山热能研究院 | Split-flow oxygen gun sprinkler head for covertering steel |
| GB2327259A (en) * | 1997-07-15 | 1999-01-20 | British Steel Plc | Steel making lances |
| CN2366420Y (en) * | 1998-12-30 | 2000-03-01 | 宝山钢铁(集团)公司 | Nozzle of oxygen lance for large scale converter |
| RU2181384C1 (en) * | 2000-12-27 | 2002-04-20 | Шатохин Игорь Михайлович | Tuyere for blowing melt metal |
-
2005
- 2005-07-28 CN CNB2005100872129A patent/CN1330777C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4190238A (en) * | 1978-05-11 | 1980-02-26 | Stahlwerke Peine-Salzgitter Ag | Lance head for a fining lance |
| CN2171599Y (en) * | 1993-06-28 | 1994-07-13 | 冶金工业部鞍山热能研究院 | Split-flow oxygen gun sprinkler head for covertering steel |
| GB2327259A (en) * | 1997-07-15 | 1999-01-20 | British Steel Plc | Steel making lances |
| CN2366420Y (en) * | 1998-12-30 | 2000-03-01 | 宝山钢铁(集团)公司 | Nozzle of oxygen lance for large scale converter |
| RU2181384C1 (en) * | 2000-12-27 | 2002-04-20 | Шатохин Игорь Михайлович | Tuyere for blowing melt metal |
Non-Patent Citations (3)
| Title |
|---|
| 国外氧枪喷头端底结构与冷却 赵荣久，炼钢，第2期 1994 * |
| 国外氧枪喷头端底结构与冷却 赵荣久，炼钢，第2期 1994;氧枪喷头冷却水流动特性的数值模似 麻向军，华南理工大学学报（自然科学看上版），第31卷第5期 2003 * |
| 氧枪喷头冷却水流动特性的数值模似 麻向军，华南理工大学学报（自然科学看上版），第31卷第5期 2003 * |
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| CN1718758A (en) | 2006-01-11 |
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Owner name: TIANJIN IRON+STEEL GROUP CO., LTD. Free format text: FORMER NAME: TIANJIN IRON+STEEL CO., LTD. |
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Address after: 300301 Tianjin, Dongli Jintang Road, No. 398 Patentee after: Tianjin Iron&Steel Group Co., Ltd. Patentee after: Institute of Process Engineering, Chinese Academy of Sciences Address before: 300301 No. five, no 1 Street, Dongli District, Tianjin Patentee before: Tianjin Iron&Steel Co., Ltd. Patentee before: Institute of Process Engineering, Chinese Academy of Sciences |
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