CN104120215B - A kind of RH vacuum refinement top rifle that dusts - Google Patents
A kind of RH vacuum refinement top rifle that dusts Download PDFInfo
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- CN104120215B CN104120215B CN201410386880.0A CN201410386880A CN104120215B CN 104120215 B CN104120215 B CN 104120215B CN 201410386880 A CN201410386880 A CN 201410386880A CN 104120215 B CN104120215 B CN 104120215B
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Abstract
The invention discloses a kind of RH vacuum refinement top rifle that dusts, comprise pipe, top rifle outer tube and top rifle marine riser in convergent-divergent channel, core pipe, top rifle pipe core, top rifle duff pipe, top rifle; Annular constrictions pipeline section and annular expansion pipeline section is formed between convergent-divergent channel and core pipe.In the present invention, air-flow can be accelerated to supersonic speed by annular constrictions pipeline section and annular expansion pipeline section, and then can improve work rifle position, and reduce splashing molten steel and glue rifle, the top lance spray nozzle life-span is longer; Between convergent-divergent channel and core pipe, aditus laryngis is annular aditus laryngis simultaneously, therefore, it is possible to increase oxygen blast flow, improves oxygen decarburization and blows oxygen by adding aluminum intensification efficiency; Oxygen, combustion gas, desulfurization powder are delivered to RH vacuum chamber in passages different separately, and desulfurization powder can surround lower arrival molten steel surface by shielding gas around, and reduced by the pulvis amount that vacuum suction siphons away, desulfurization powder recovery rate improves; And compared with the rifle of existing top, it is without the need to adopting precision casting, and manufacture difficulty obviously reduces.
Description
Technical field
The present invention relates to the vacuum degasser for external refining in a kind of metallurgy industry, particularly a kind of RH vacuum refinement top rifle that dusts.
Background technology
Molten steel vacuum circulation degassing (RH) technology is a kind of steel secondary refining technique, is the external refining means of producing high quality variety steel indispensability.RH vacuum refining device is at first for liquid steel degassing, its metallurgy principle relies on pressure reduction that molten steel is promoted to vacuum chamber, and make Circulating Flow of Molten Steel by blowing argon gas, utilize vacuum environment to reach the object of degassed (N2, H2, O2), its advantage is that speed of response is fast, vacuum tightness is high, metallurgical effect is good.In recent years, KTB (KawasakiTopBlowing) the overhead oxygen rifle developed by Kawasaki company, RH vacuum refinement is possessed, and the greater functionality such as decarburization, CO secondary combustion heating is forced in efficient oxygen blast, and RH technology is more widely used.Along with user increases day by day to ultralow-sulfur steel ([S]≤0.0030%) demand, some high-grade steel even require that sulphur content is lower than 5 to 15PPM, therefore blowing powder desulfurization technology is introduced into vacuum refinement, has occurred the top rifle with function of dusting.
But no matter be that RH-KTB pushes up rifle, or the RH-MFB of exploitation later pushes up rifle, RH-MESID pushes up rifle, RH-PB pushes up rifle and Chinese patent 200420027046.4, 200610076151.0, 200820174977.5, 200820174973.7, 200820174973.7, 201110000083.0, 201210346652.1, 201310431081.6 involved top rifle or shower nozzle, its convergent-divergent channel is generally in central position, blast tube is distributed in outside convergent-divergent channel, indivedual rifle head blast tube is in central position, and convergent-divergent channel adopts the external tilt distribution of porous, all there is manufacture difficulty large, work-ing life is low, oxygen blast limited flow, easily the shortcomings such as rifle are blocked up in using.
Summary of the invention
In view of this, the object of this invention is to provide a kind of RH vacuum refinement top rifle that dusts, high with the manufacture difficulty overcoming the rifle existence of existing top, easily stifled rifle, the shortcomings such as work-ing life is low.
The RH vacuum refinement top rifle that dusts of the present invention, comprises convergent-divergent channel, top rifle pipe core that core pipe is connected with core pipe, is arranged in top rifle that the top rifle duff pipe pushed up in rifle pipe core is connected with convergent-divergent channel rear end the top rifle outer tube of managing and being connected with convergent-divergent channel front end and is arranged on the top rifle marine riser pushed up in rifle between Guan Yuding rifle outer tube; Described core pipe is coaxially arranged in convergent-divergent channel, form annular constrictions pipeline section that cross section diminishes vertically gradually between convergent-divergent channel and core pipe and cross section becomes large annular expansion pipeline section vertically gradually, the connection section of described annular constrictions pipeline section and annular expansion pipeline section is annular aditus laryngis; Cavity in the rifle of top between pipe and top rifle outer tube is separated into the water entry and water exit that are interconnected by described top rifle marine riser.
Further, described convergent-divergent channel and the coaxial core pipe be arranged in convergent-divergent channel are welded to connect.
Further, described top rifle duff pipe is connected with top rifle pipe core coaxial welding.
Further, described top rifle pipe core is plugged in core pipe, and is provided with an O RunddichtringO between top rifle pipe core and core pipe.
Further, the rear end of described convergent-divergent channel is plugged in the rifle of top in pipe, and is provided with the second O-ring seals between pipe in convergent-divergent channel and top rifle.
Further, the front end of described convergent-divergent channel is formed with the annular tube shaped joint with the bending of pipe rear end outside pipe, and described top rifle outer tube is connected with annular tube shaped weld.
Beneficial effect of the present invention:
1, the RH vacuum refinement top rifle that dusts of the present invention; employing water-cooled is protected; air-flow can be accelerated to supersonic speed by its annular constrictions pipeline section and annular expansion pipeline section; and then work rifle position can be improved; reduce splashing molten steel and glue rifle; reduce consumption of cooling-water, and the annular aditus laryngis of annular constrictions pipeline section and annular expansion pipeline section connection section more can effectively prevent stifled rifle than circular aditus laryngis, therefore the top lance spray nozzle life-span is longer.
2, the RH vacuum refinement top rifle that dusts of the present invention, it accelerates to supersonic speed by interconnective annular constrictions pipeline section and annular expansion pipeline section to Oxygen Flow, and ring-type aditus laryngis (aditus laryngis refers to that gas velocity reaches the pipeline smallest cross-sectional place of velocity of sound) can keep under the condition that oxygen pressure is identical with traditional RH equipment for vacuum refining, increase oxygen blast flow, oxygen decarburization and the efficiency of blowing oxygen by adding aluminum intensification can be improved further.
3, the RH vacuum refinement top rifle that dusts of the present invention, the passage conveying in the rifle of interior pipe top between Guan Yuding rifle pipe core of oxygen or other gas, carry in the passage of combustion gas between top rifle pipe core and top rifle duff pipe, desulfurization powder is carried in the rifle duff pipe of top, thus makes oxygen, combustion gas, desulfurization powder in passages different separately, be delivered to RH vacuum chamber; Thus in powder injection desulphurization period, shielding gas can be passed at oxygen channel, make desulfurization powder arrive molten steel surface under being surrounded by the shielding gas of surrounding, thus can reduce the pulvis amount siphoned away by vacuum suction, the recovery rate of raising desulfurization powder; And can at baking vacuum chamber or except cold steel period, realize pure oxygen or oxygen-enriched combustion-supporting coal gas or Sweet natural gas, can heating efficiency be significantly improved.
4, the RH vacuum refinement top rifle that dusts of the present invention, compared with the rifle of existing top, it is without the need to adopting precision casting, and manufacture difficulty is obviously reduced.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of RH vacuum refinement of the present invention with the top rifle that dusts;
Fig. 2 is the three-dimensional arrangement sectional view of convergent-divergent channel and core pipe.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in the figure, the present embodiment RH vacuum refinement top rifle that dusts, comprise convergent-divergent channel 1, the top rifle pipe core 3 that core pipe 2 is connected with core pipe 2, be arranged on top rifle outer tube 6 that in top rifle that the top rifle duff pipe 4 pushed up in rifle pipe core 3 is connected with convergent-divergent channel 1 rear end, pipe 5 is connected with convergent-divergent channel 1 front end and be arranged on the top rifle marine riser 7 pushed up in rifle between pipe 5 and top rifle outer tube 6; Described core pipe 2 is coaxially arranged in convergent-divergent channel 1, form annular constrictions pipeline section 8 that cross section diminishes vertically gradually between convergent-divergent channel 1 and core pipe 2 and cross section becomes large annular expansion pipeline section 9 vertically gradually, the connection section of described annular constrictions pipeline section 8 and annular expansion pipeline section 9 is annular aditus laryngis 10; Cavity in the rifle of top between pipe 5 and top rifle outer tube 6 is separated into the water entry 11 and water exit 12 that are interconnected by described top rifle marine riser 7, the interconnecting part of water entry 11 described in the present embodiment and water exit 12 is near the front end of convergent-divergent channel 1, water coolant can be made along the whole pipe shaft length flowing of convergent-divergent channel 1, and cooling performance is better.
During work, RH vacuum refinement dust top rifle enter vacuum chamber by the top rifle seal channel at vacuum chamber top, and continue to pass into water coolant at top gun cooling water passage, to cool top rifle, molten steel enters vacuum chamber by the soaking tub bottom vacuum chamber, and oxygen, combustion gas, desulfurization powder are delivered to RH vacuum chamber in different separately passage in the rifle of top.
Smelt the phase at oxygen decarburization and blow oxygen by adding aluminum temperature raising period, the oxygen that pressure is 1MPa is passed at top rifle oxygen channel (pipeline in the rifle of top between pipe 5 and top rifle pipe core 3), inert protective gas is passed in top rifle pipe core 3, after finishing blowing, oxygen channel inert gas purge, and continue to be blown into protectiveness rare gas element; Because oxygen can be accelerated to supersonic speed after annular constrictions pipeline section 9, annular aditus laryngis 10 and annular expansion pipeline section 9, the velocity of sound position of its air-flow is annular aditus laryngis, therefore keeping under the condition that oxygen pressure is identical with traditional RH equipment for vacuum refining, the present embodiment RH vacuum refinement top rifle that dusts can increase oxygen blast flow, improves oxygen decarburization and the efficiency of blowing oxygen by adding aluminum intensification.
In the powder injection desulphurization phase, pass into the desulfurization powder carried by rare gas element in top rifle duff pipe 4, oxygen channel passes into inertia protection gas; Dust after terminating, top rifle duff pipe 4 inert gas purge, oxygen channel, top rifle pipe core 3 continue to be blown into protectiveness rare gas element; Because desulfurization powder arrives molten steel surface under being surrounded by the shielding gas of surrounding, thus the pulvis amount siphoned away by vacuum suction can be reduced, improve the recovery rate of desulfurization powder.
At heat temperature raising or except the cold steel phase, pass into combustion gas in top rifle pipe core 3, oxygen channel passes into oxygen-rich air or pure oxygen combustion-supporting, after process terminates, all needs to purge and passes into inertia protection gas; Owing to achieving pure oxygen or oxygen-enriched combustion-supporting coal gas or Sweet natural gas, therefore heating efficiency can be significantly improved.
In the present embodiment, described top rifle pipe core 3 is plugged in core pipe 2, and is provided with an O RunddichtringO 13 between top rifle pipe core 3 and core pipe 2; The rear end of described convergent-divergent channel 1 is plugged in the rifle of top in pipe 5, and is provided with the second O-ring seals 14 between pipe 5 in convergent-divergent channel 1 and top rifle; The front end of described convergent-divergent channel 1 is formed with the annular tube shaped joint 15 with the bending of pipe rear end outside pipe, and described top rifle outer tube 6 is welded to connect with annular tube shaped joint 15; The outer tube wall of described core pipe 2 is provided with bearing rib 16, and described core pipe 2 is connected with the inner tubal wall coaxial welding of convergent-divergent channel 1 by bearing rib 16; Described top rifle duff pipe 4 is connected with top rifle pipe core 3 coaxial welding; Because syndeton between each building block shape and each parts is simple, without the need to adopting precision casting, therefore compared with the rifle of existing top, manufacture difficulty is obviously reduced.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. the RH vacuum refinement top rifle that dusts, is characterized in that: comprise convergent-divergent channel, top rifle pipe core that core pipe is connected with core pipe, be arranged in top rifle that the top rifle duff pipe pushed up in rifle pipe core is connected with convergent-divergent channel rear end the top rifle outer tube of managing and being connected with convergent-divergent channel front end and be arranged on the top rifle marine riser pushed up in rifle between Guan Yuding rifle outer tube; Described core pipe is coaxially arranged in convergent-divergent channel, form annular constrictions pipeline section that cross section diminishes vertically gradually between convergent-divergent channel and core pipe and cross section becomes large annular expansion pipeline section vertically gradually, the connection section of described annular constrictions pipeline section and annular expansion pipeline section is annular aditus laryngis; Cavity in the rifle of top between pipe and top rifle outer tube is separated into the water entry and water exit that are interconnected by described top rifle marine riser.
2. the RH vacuum refinement top rifle that dusts according to claim 1, is characterized in that: described convergent-divergent channel and coaxially the core pipe be arranged in convergent-divergent channel are welded to connect.
3. the RH vacuum refinement top rifle that dusts according to claim 1, is characterized in that: described top rifle duff pipe is connected with top rifle pipe core coaxial welding.
4. the RH vacuum refinement top rifle that dusts according to claim 1, is characterized in that: described top rifle pipe core is plugged in core pipe, and is provided with an O RunddichtringO between top rifle pipe core and core pipe.
5. the RH vacuum refinement top rifle that dusts according to claim 1, is characterized in that: the rear end of described convergent-divergent channel is plugged in the rifle of top in pipe, and is provided with the second O-ring seals between pipe in convergent-divergent channel and top rifle.
6. the RH vacuum refinement top rifle that dusts according to claim 1, is characterized in that: the front end of described convergent-divergent channel is formed with the annular tube shaped joint with the bending of pipe rear end outside pipe, and described top rifle outer tube is connected with annular tube shaped weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386880.0A CN104120215B (en) | 2014-08-07 | 2014-08-07 | A kind of RH vacuum refinement top rifle that dusts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386880.0A CN104120215B (en) | 2014-08-07 | 2014-08-07 | A kind of RH vacuum refinement top rifle that dusts |
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| CN104120215A CN104120215A (en) | 2014-10-29 |
| CN104120215B true CN104120215B (en) | 2015-11-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20220149775A (en) * | 2020-01-09 | 2022-11-08 | 베수비우스 레프라타리오스 엘티디에이. | Lances for use in metal production and foundry equipment |
| CN112808991A (en) * | 2020-12-27 | 2021-05-18 | 上海交通大学安徽(淮北)陶铝新材料研究院 | In-situ autogenous aluminum matrix composite material system with permanent magnet stirring function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2905813Y (en) * | 2006-03-09 | 2007-05-30 | 上海宝钢工程技术有限公司 | Multifunctional top-blowing gun for melt steel vacuum refining |
| CN201296765Y (en) * | 2008-11-10 | 2009-08-26 | 王�华 | Multifunctional top lance head for vacuum refining of liquid steel |
| CN102828003A (en) * | 2012-09-18 | 2012-12-19 | 苏州宝联重工股份有限公司 | Molten steel vacuum refining top gun |
| CN204162740U (en) * | 2014-08-07 | 2015-02-18 | 中冶赛迪上海工程技术有限公司 | A kind of RH vacuum refinement top rifle that dusts |
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2014
- 2014-08-07 CN CN201410386880.0A patent/CN104120215B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2905813Y (en) * | 2006-03-09 | 2007-05-30 | 上海宝钢工程技术有限公司 | Multifunctional top-blowing gun for melt steel vacuum refining |
| CN201296765Y (en) * | 2008-11-10 | 2009-08-26 | 王�华 | Multifunctional top lance head for vacuum refining of liquid steel |
| CN102828003A (en) * | 2012-09-18 | 2012-12-19 | 苏州宝联重工股份有限公司 | Molten steel vacuum refining top gun |
| CN204162740U (en) * | 2014-08-07 | 2015-02-18 | 中冶赛迪上海工程技术有限公司 | A kind of RH vacuum refinement top rifle that dusts |
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| CN104120215A (en) | 2014-10-29 |
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