CN205313599U - Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow - Google Patents
Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow Download PDFInfo
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- CN205313599U CN205313599U CN201620026223.XU CN201620026223U CN205313599U CN 205313599 U CN205313599 U CN 205313599U CN 201620026223 U CN201620026223 U CN 201620026223U CN 205313599 U CN205313599 U CN 205313599U
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Abstract
The utility model provides a rifle head structure of converter oxygen blast flow is adjusted to the double - circuit oxygen flow. Adopt double - circuit oxygen flow passageway, the supersonic jet of oxygen rifle is guaranteed to main oxygen flow, and in certain extent continuously adjustable oxygen suppliment volume is guaranteed to vice oxygen flow. Rifle head structure includes concentric sleeve pipe of multilayer and multi -functional shower nozzle, and the converter is kicked into with supersonic speed constant current volume to the lavalle type spout of main oxygen flow on through the shower nozzle and annular seam spout, and center tube that vice oxygen flow passes through passes that the shower nozzle center is direct sends into the converter with oxygen with subsonic speed unsteady flow volume, and vice oxygen flow can also carry for the BOF steelmaking powder and send into the converter and do not influence the mach number of main oxygen flow under of the sweeping along of annular seam oxygen flow to obtain higher powder utilization ratio.
Description
Technical field
The utility model belongs to field of steel-making in metallurgy industry, in particular to the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow.
Background technology
Converter steelmaking is the important means of Iron and Steel Production, and top blow oxygen lance is one of key equipment of oxygen converter steelmaking. Converter top-blow oxygen rifle can realize oxygen pressure can be converted to kinetic energy, at present the general supersonic speed sprinkler design adopting single hole and porous circular hole to draw tile, oxygen system Chang Weidan gas circuit hyperbaric oxygen. Bessemerizing early stage basicity of slag low, easy peroxidation, cross foamed and also bring out splash, dephosphorization efficiency is low, the transformation of blowing later stage decarburizing reaction mechanism early, is reacted from balanced remote between slag, the decarburization utilization ratio of oxygen is low, causing the more difficult control of steel quality, raw materials consumption is higher. Common treating method is that constant current amount adjusts rifle position or permanent rifle position to adjust flow, but proposes rifle operation and can reduce oxygen utilization rate, and reduces oxygen flow and can deviate supersonic jet point, affects jet agitation effect. Utility model patent 89103227.4 proposes to adopt by centre hole and three to four double flow duct top blow oxygen lances with the surrounding hole at inward turning angle and becomes rifle position and the full unsteady flow amount blowing of double flow duct, bessemerizes the problems such as forward and backward phase stirring intensity of molten pool is not enough for solving. But owing to its centre hole and surrounding hole are Lavalle spout, its changeable flow adjustment must deviate supersonic jet point, affects jet agitation effect, its technology does not obtain extensively accreditation and application.
The utility model patent that Authorization Notice No. is CN102134627 relates to a kind of dual channel oxygen lance, and its double flow duct is only at rifle body portion, and its shower nozzle is still common single gas circuit Lavalle shower nozzle, and double flow duct only realizes CO2Make cooling gas and substitute the cooling material such as iron ore, oxide skin.
Application number be 200510011201.2 utility model patent disclose a kind of converter steelmaking double channel cluster fluidic oxygen gun smelting technology and shower nozzle, oxygen is divided into central oxygen jet and outer annular oxygen jet by its oxygen thrust-augmenting nozzle, central oxygen is by 1～8 Lavalle shower nozzle injection supersonic speed oxygen stream, each Lavalle shower nozzle all produces high temperature rarefied gas around outer annular jet and with converter CO burning, and parcel central jet forms clustered oxygen flow. This technology oxygen flow and pressure can adjust according to smelting process, and changing slag stage center main oxygen is design oxygen-supplying amount 70%, and annular oxygen is the 100% of design oxygen amount;Decarburizing phase center main oxygen is the 100% of design oxygen amount, and annular oxygen is the 50% of design oxygen amount; Slag and temperature adjusting stage center main oxygen are the 50% of design oxygen amount, and annular oxygen is the 50% of design oxygen amount. In fact, emulation and practice all illustrate: when center main oxygen oxygen flow starts to be less than supersonic design flow, the Mach number rapid reduction of jet, its jet impulse and stirring capacity rapid decrease, thus do not reduce rifle position just cannot make oxygen stream penetrate foamy slag arrive weld pool surface.
Converter routine is smelted, converter current blowing is more suitable for the molten iron that smelting phosphorus content is less than less than 0.15%, for smelt phosphorus content be greater than 0.15% even up to 0.2% molten iron, mean to be improved further the dephosphorization rate of convertor steelmaking process, to meet the requirement of finished product molten steel phosphorus content. According to conventional experience, increase in the process of bessemerizing function of dusting can realize in the smelting of high phosphorus hot metal. In addition, can obtaining thermal compensation to converter coal injection, 1kg coal dust can melt 7kg steel scrap more. But most of dusting devices of steel mill's converter at present, as number of patent application 201210123055.2,201220155429.4, the technical scheme announced such as 201410542384.X, directly introduce top-blown powder function at existing oxygen gun system, it does not have shower nozzle and oxygen system are carried out rational Design on Plane. One class scheme pulvis is mixed into main oxygen stream from the ejection of hole, Lavalle, and the fluid density of random fluctuation destroys the formation condition of supersonic airstream, cannot realize stable supersonic jet; Another class conceptual design has the proprietary passage of pulvis, but the pulvis of ejection can be swept away by the negative pressure district air-flow that the miscarriage of surrounding supersonic speed oxygen is raw, seriously have impact on the utilization ratio of pulvis, and reduce rifle position so that more pulvis enter the splash that molten bath can increase smelting process and produce, sticky rifle is caused even to cause the risk of security incident, therefore the existing converter technology of dusting is difficult to reach the desired result of high efficiency dephosphorating, becomes one of difficult problem that in converter process, high phosphorus hot metal technique faces.
Practical novel content
The deficiencies in the prior art in view of the above, the purpose of this utility model is to provide a kind of two-way oxygen stream to regulate the rifle header structure of Converter Oxigen Blowing flow, to ensure constant supersonic jet.
For achieving the above object and other relevant objects, technical solutions of the utility model are as follows:
The rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow, comprise shower nozzle and pipe core, described shower nozzle has centre hole, described pipe core stretches in shower nozzle centre hole, form the injection channel first shrinking and expanding afterwards along injection direction between pipe core outer wall and shower nozzle inwall, and between described pipe core outer wall and shower nozzle aditus laryngis place inwall, forming annular groove seam spout, the shower nozzle surface thereof of described centre hole surrounding is provided with multiple Lavalles type spout.
Adopting said structure, in the process of bessemerizing, main oxygen flows through the Lavalle type spout on shower nozzle and annular groove seam spout injects converter with supersonic speed, and secondary oxygen stream and pulvis directly inject converter by pipe core. Main oxygen stream maintains supersonic jet, keeps stirring and the surging force in molten bath is constant, can when rifle position constant and when maintaining supersonic jet, realized the adjustment of oxygen-supplying amount by the adjustment of oxygen stream flow secondary in pipe core, to adapt to process requirements.
As preferably: also comprise the main oxygen tube, marine riser and the water cooling tube that arrange successively from the inside to the outside, described main oxygen tube and water cooling tube weld with shower nozzle respectively, form water coolant water entry between described main oxygen tube and marine riser, between described marine riser and water cooling tube, form water coolant backwater channel.
As preferably: described pipe core insertion shower nozzle centre hole, pipe core outer wall and shower nozzle aditus laryngis section inwall are located by rib ridge, form described annular groove seam spout.
As preferably: form secondary oxygen circulation road or pulvis passage in described pipe core, form main oxygen circulation road between described main oxygen tube and pipe core, main oxygen flows through annular groove seam spout and Lavalle type spout sprays into converter.
Main oxygen circulation road and secondary oxygen circulation road are separate, in the process of bessemerizing, main oxygen flows through Lavalle type spout and annular groove seam spout injects converter with constant supersonic speed, secondary oxygen flows through pipe core and injects converter with subsonic speed changeable flow, by regulating separately the flow of secondary oxygen stream to realize the adjustment of total oxygen flow. In the process of bessemerizing, by regulating secondary oxygen stream to realize the continuous adjustment of oxygen-supplying amount until closing, described main oxygen stream equals to bessemerize required oxygen flow with the oxygen flow summation of secondary oxygen stream, and the peak flow summation of described main oxygen stream and secondary oxygen stream equals the design maximum flow bessemerized. The supersonic airstream that the oxygen stream of pipe core injection or pulvis are stitched spout injection by annular groove enters steel-smelting furnace around parcel.
As preferably: described pipe core is straight pipe, described shower nozzle centre hole along injection direction formed successively reducing shrink section, etc. footpath aditus laryngis section and reducing expansion segment.
Adopting two-way oxygen circulation road, main oxygen stream ensures the supersonic jet of oxygen rifle, and secondary oxygen stream ensures to regulate oxygen-supplying amount within the specific limits continuously. Main oxygen flows through the Lavalle type spout on shower nozzle and annular groove seam spout injects converter with supersonic speed constant current amount, oxygen is directly sent into converter with subsonic speed unsteady flow amount through shower nozzle center by the pipe core that secondary oxygen flows through, secondary oxygen stream can also carry the Mach number that converter steelmaking pulvis stitches feeding converter under the sweeping along of oxygen stream and do not affect main oxygen stream at annular groove, and obtains higher pulvis utilization ratio.
As mentioned above, it is necessary, the beneficial effects of the utility model are:
1, in converting process, rifle position can remain unchanged.
2, regulating in time continuously oxygen rifle total flux in a big way according to the process that can blow, regulation range is that the minimum value of pair oxygen stream is to maximum value.
3, when regulating oxygen rifle total flux, oxygen jet flow and the flow velocity of supersonic speed Lavalle type spout and annular groove seam spout keep constant in converting process, keep stirring and the surging force in molten bath is constant.
4, while main oxygen stream supersonic speed blows, it is possible to dust by pipe core, it is to increase the metallurgical effects such as dephosphorization, desulfurization, decarburization.
5, around sweeping along, pulvis sprays into molten bath in the supersonic jet of annular groove seam spout, it is to increase pulvis utilization ratio.
6, secondary oxygen stream injects molten bath under the supersonic jet of annular groove seam spout is swept along, and obtains the effect that cluster fluidic injects molten steel.
7, secondary oxygen circulation road leads to into CO2Too high converter temperature can be reduced, prevent slag " returning dry " or the excessive foamed of slag, thus reduce converter generation splash.
8, tiltedly put Lavalle type spout and can improve melting bath stirring effect.
Accompanying drawing explanation
Fig. 1 is the utility model rifle header structure axis profile schematic diagram;
Fig. 2 is the utility model rifle header structure bottom surface spout schematic diagram;
Fig. 3 is the utility model rifle header structure 3D diagrammatic cross-section.
Part label explanation
1 main oxygen circulation road
2 secondary oxygen circulation roads
3 Lavalle type spouts
4 annular groove seam spouts
5 water coolant water entrys
6 water coolant backwater channels
7 shower nozzles
8 pipe cores
9 main oxygen tubes
10 marine risers
11 water cooling tubes
Embodiment
By particular specific embodiment, enforcement mode of the present utility model being described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present utility model and effect easily.
As shown in Figure 1 to Figure 3, the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow, comprise shower nozzle 7 and pipe core 8, described shower nozzle 7 has centre hole, pipe core 8 stretches in shower nozzle 7 centre hole, forming, between pipe core 8 outer wall and shower nozzle 7 inwall, the injection channel first shrinking and expanding afterwards along injection direction, and form annular groove seam spout 4 between described pipe core 8 outer wall and shower nozzle 7 aditus laryngis place inwall, shower nozzle 7 surface thereof of described centre hole surrounding is provided with multiple Lavalles type spout 3.Also comprise the main oxygen tube 9, marine riser 10 and the water cooling tube 11 that arrange successively from the inside to the outside, main oxygen tube 9 and water cooling tube 11 weld with shower nozzle 7 respectively, water coolant water entry 5 is formed between main oxygen tube 9 and marine riser 10, water coolant backwater channel 6 is formed between marine riser 10 and water cooling tube 11, secondary oxygen circulation road 2 is formed in pipe core 8, can leading to into oxygen stream, form main oxygen circulation road 1 between pipe core 8 and main oxygen tube 9, Lavalle type spout 3 and annular groove seam spout 4 are main oxygen stream injection channel. In the process of bessemerizing, main oxygen flows through Lavalle type spout 3 and annular groove seam spout 4 injects converter with constant supersonic speed, and secondary oxygen flows through pipe core 8 and injects converter with subsonic speed changeable flow.
Wherein pipe core 8 outer wall and shower nozzle 7 aditus laryngis section inwall are located by rib ridge, form described annular groove seam spout 4, positioning edge ridge in this example is formed by the arc-shaped protrusions being arranged on center bore inner wall, adjacent protrusions and pipe core 8 outer wall form annular groove crack structure, in other embodiments, positioning edge ridge can be located on pipe core 8 outer wall.
In this example, pipe core 8 is straight pipe, described shower nozzle 7 centre hole along injection direction formed successively the reducing that diameter reduces gradually shrink section, etc. the reducing expansion segment that increases gradually of footpath aditus laryngis section and diameter. In other embodiments, pipe core 8 outer wall can also be variable-diameter structure etc.
When above-mentioned rifle header structure is applied in decarburization converter, converter oxygen system adopts the two-way oxygen stream controlled comprising main oxygen stream and secondary oxygen stream, wherein main oxygen stream is supersonic jet, in the process of bessemerizing, its flow and pressure ensure that the Lavalle type spout 3 of converter oxygen gun rifle head produces supersonic jet with annular groove seam spout 4 all the time, wherein secondary oxygen stream is subsonic speed jet, ensures to regulate oxygen-supplying amount continuously within the specific limits until closing according to the needs of smelting technology process; Main oxygen stream equals the minimal design flow bessemerized, and secondary oxygen stream equals to regulate flow, and the peak flow summation of main oxygen stream and secondary oxygen stream equals the design maximum flow bessemerized.
When above-mentioned rifle header structure is applied to dephosphorization converter, main oxygen stream presses dephosphorization converter necessary flow, pressure design, and oxygen consumption is 8～15Nm3/ t, injects dephosphorization converter by the circular hole Lavalle type spout 3 on shower nozzle 7 and annular groove seam spout 4 with constant supersonic speed, and pipe core 8 inputs passage as pulvis, and the carrier gas of conveying pulvis is oxygen or other rare gas element, and carrier gas consumption is 0.2～1.0Nm3/ t. The pulvis that secondary oxygen circulation road 2 inputs is pulvis needed for the various converter smeltings such as dephosphorization pulvis, desulfurization powder, decarburization pulvis, and pulvis consumption is 5～20kg/t. The supersonic jet of annular groove seam spout 4 injects molten bath around the pulvis sweeping along pipe core 8 to spray, and avoids pulvis to be entrainmented by the negative pressure district air-flow that type spout 3 supersonic speed oxygen miscarriage in circular hole Lavalle is raw, ensures pulvis utilization ratio. In the process of bessemerizing, the flow of main oxygen stream and pressure ensure that rifle head Lavalle type spout 3 and annular groove seam spout 4 produce supersonic jet all the time, secondary oxygen stream then needs according to smelting technology process regulate oxygen-supplying amount continuously within the specific limits until closing. Pipe core 8 is used as pulvis input passage as the passage of secondary oxygen stream simultaneously, and conveying pulvis is one or more in the various pulvis needed for converter smelting process such as lime powder, light dolomite powder, limestone powder, fluorite powder, iron ore powder, manganese ore stone flour, dedusting ash.
The utility model achieves following effect:
1) can when rifle position remain unchanged in converting process, it is achieved the adjustment of total oxygen flow, in a big way in, regulate oxygen rifle total flux continuously according to the process that can blow, regulation range is that the minimum value of pair oxygen stream is to maximum value.
2) when regulating oxygen rifle total flux, oxygen jet flow and the flow velocity of Lavalle type spout 3 and annular groove seam spout 4 keep constant, keep the stirring to molten bath and surging force constant in converting process. Tiltedly put Lavalle type spout 3 and can improve melting bath stirring effect.
3) secondary oxygen stream injects molten bath under the supersonic jet of annular groove seam spout 4 is swept along, and obtains the effect that cluster fluidic injects molten steel.
4) while main oxygen stream supersonic speed blows, it is possible to dust by pipe core 8, it is to increase the metallurgical effects such as dephosphorization, desulfurization, decarburization.
5) supersonic jet of annular groove seam spout 4 sweeps along pulvis to spray into molten bath, avoids Entraining Effect, it is to increase pulvis utilization ratio.
6) secondary oxygen circulation road 2 leads to into CO2Too high converter temperature can be reduced, prevent slag " returning dry " or the excessive foamed of slag, thus reduce converter generation splash.
7) supersonic jet extended improves work rifle position, reduces cooling water consumption, extends the top lance spray nozzle life-span;
Above-described embodiment all not running counter under spirit of the present utility model and category, can be modified or change by any person skilled in the art scholar. Therefore, in art, tool usually intellectual modifies or changes not departing under the spirit and technological thought that the utility model discloses all equivalences completed such as, must be contained by claim of the present utility model.
Claims (5)
1. the rifle header structure of a two-way oxygen stream regulating rotary furnace roof oxygen blast flow, it is characterized in that: comprise shower nozzle and pipe core, described shower nozzle has centre hole, described pipe core stretches in shower nozzle centre hole, form the injection channel first shrinking and expanding afterwards along injection direction between pipe core outer wall and shower nozzle inwall, and between described pipe core outer wall and shower nozzle aditus laryngis place inwall, forming annular groove seam spout, the shower nozzle surface thereof of described centre hole surrounding is provided with multiple Lavalles type spout.
2. the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow according to claim 1, it is characterized in that: also comprise the main oxygen tube, marine riser and the water cooling tube that arrange successively from the inside to the outside, described main oxygen tube and water cooling tube weld with shower nozzle respectively, form water coolant water entry between described main oxygen tube and marine riser, between described marine riser and water cooling tube, form water coolant backwater channel.
3. the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow according to claim 1, it is characterised in that: described pipe core insertion shower nozzle centre hole, pipe core outer wall and shower nozzle aditus laryngis section inwall are located by rib ridge, form described annular groove seam spout.
4. the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow according to claim 2, it is characterised in that: form secondary oxygen circulation road or pulvis passage in described pipe core, between described main oxygen tube and pipe core, form main oxygen circulation road.
5. the rifle header structure of a kind of two-way oxygen stream regulating rotary furnace roof oxygen blast flow according to claim 1, it is characterised in that: described pipe core is straight pipe, described shower nozzle centre hole along injection direction formed successively reducing shrink section, etc. footpath aditus laryngis section and reducing expansion segment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620026223.XU CN205313599U (en) | 2016-01-12 | 2016-01-12 | Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow |
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| CN201620026223.XU CN205313599U (en) | 2016-01-12 | 2016-01-12 | Rifle head structure of converter top blowing oxygen flow is adjusted to double - circuit oxygen flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441624A (en) * | 2016-01-12 | 2016-03-30 | 中冶赛迪上海工程技术有限公司 | Lance head structure and method for double-oxygen-flow adjustment of top blowing oxygen flow rate of converter |
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2016
- 2016-01-12 CN CN201620026223.XU patent/CN205313599U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441624A (en) * | 2016-01-12 | 2016-03-30 | 中冶赛迪上海工程技术有限公司 | Lance head structure and method for double-oxygen-flow adjustment of top blowing oxygen flow rate of converter |
| CN105441624B (en) * | 2016-01-12 | 2020-09-08 | 中冶赛迪上海工程技术有限公司 | Gun head structure and method for regulating converter top blown oxygen flow by double-path oxygen flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhongye Saide Engineering Technology Co., Ltd. Assignor: CISDI Shanghai Engineering Co., Ltd. Contract record no.: 2018310000032 Denomination of utility model: Lance head structure and method for double-oxygen-flow adjustment of top blowing oxygen flow rate of converter Granted publication date: 20160615 License type: Common License Record date: 20180716 |
|
| EE01 | Entry into force of recordation of patent licensing contract |