CN201924035U - Swirl bottom-blowing air supply element for combined blown converter - Google Patents
Swirl bottom-blowing air supply element for combined blown converter Download PDFInfo
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- CN201924035U CN201924035U CN2010205241853U CN201020524185U CN201924035U CN 201924035 U CN201924035 U CN 201924035U CN 2010205241853 U CN2010205241853 U CN 2010205241853U CN 201020524185 U CN201020524185 U CN 201020524185U CN 201924035 U CN201924035 U CN 201924035U
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Abstract
The utility model discloses a swirl bottom-blowing air supply element for a combined blown converter, which is characterized in that the bottom-blowing air supply element is a spiral metal pipe; an inlet at the bottom end of the spiral metal pipe is provided with a linear section; the length of the linear section is 10-25mm; the vertical axis of the spiral metal pipe in the upward direction relative to the linear section is in the spiral ascending shape; and the included angle theta of an air outlet at the upper end and the vertical axis is more than 5 degrees and is less than 15 degrees. Air sprayed from a nozzle of the spiral metal pipe enters a metal molten pool along the tangential direction of the edge of the nozzle and applies both axial impact force and radial impact force on the molten metal in the metal molten pool, so the metal molten pool is enabled to have rotary movement, the action condition of the sprayed air on the metal molten pool is improved and the stirring intensity towards the metal molten pool is improved. as an air channel is not perpendicular to the molten metal level of the metal molten pool, molten steel is avoided from directly infusing into the air channel of a bottom gun, and the blockage of the bottom gun is further reduced.
Description
Technical field
The utility model relates to the steel-smelting technology in ferrous metallurgy field, especially a kind of furnace bottom gas supply element of used for re-blowing revolving furnace.
Background technology
The oxygen coverter top-bottom blowing had both utilized the bottom blowing air-flow to overcome the top blast oxygen flow to the insufficient weakness of molten bath stirring capacity, made reaction in furnace near balance, and iron loss reduces; Simultaneously kept top-blown method again and controlled the advantage of slagging process easily, thereby had, become the main method of present oxygen converter steelmaking than top blown converter and the better technico-economical comparison of bottom-blown converter.
The bottom blowing of combined blown converter can improve the combustion intensity of converter, makes the smelting low carbon steel more convenient; Bottom blowing can reduce (TFe) in the slag, makes (TFe) in the slag can be controlled at suitable scope, thus make do not prolong tap to tap time and carry out blow off after stirring operation become possibility; Bottom blowing has reduced the consumption of unslaked lime, because bottom blown gas has been strengthened the whipping force in the molten bath, has improved dephosphorization efficient; Bottom blowing can improve the residual manganese of terminal point, when making low-carbon (LC) field blow off in the steel manganese content had and significantly improved; In addition, bottom blowing makes when smelting carbon content less than 0.04% soft steel, hangs down 200ppm when oxygen level is still smelted than top blown converter in the steel approximately, thereby has improved the purity of steel; Bottom blowing can also be used for the pre-dephosphorization of molten iron.This shows that bottom blowing has important effect in converter steelmaking, but in actual production, factors such as the difference of rifle of existing end winding-up element and operation the difference of bottom blowing intensity can be caused, and end rifle phenomenon of blocking can be often occurred in the stove labour later stage." heavy steel technology " magazine 2004,47 (4): 8-11. " the stirring research in the unusual combined blown converter molten bath of stopping up of bottom blowing spray gun " has done introduction to this.This type of problem causes blowing again rate and reduces.Thereby develop a kind of novel end rifle structure and not only for the rate of blowing of answering that increases converter steelmaking important meaning is arranged, also have important and practical meanings for converter smelting soft steel and middle high phosphorus hot metal simultaneously.The smelting potential that can make converter of finishing of this work obtains bigger development and utilization, further improves the throughput of converter; For the sophisticated smelting technology that blows again day by day very big promoter action is arranged also.
The Chen Jiaxiang chief editor, " Ferrous metallurgy " metallurgical industry press, Beijing .1990 has proposed the track development of the type of bottom-blowing air feed element along single tube-bilayer sleeve-gas permeable brick-straight-through porous plug.And early stage what use is single hose nozzle type gas supply element, when using this element, under the gas flow regulation range, processing requirement be can not satisfy, and molten steel bonding nozzle and hot-metal carburized steel caused easily, and the deteriorating of nozzle.Therefore the bilayer sleeve nozzle occurred, but that the adjustable tolerance scope of this gas supply element shows still is little, makes difficulty when smelting middle and high carbon steel dephosphorization.Then occurred again a kind ofly can in a big way, regulating the circular seam type nozzle of tolerance, present this nozzle application more extensive, but the subject matter of this nozzle is to stitch very narrowly, is not suitable for dusting, concentricity is difficult to guarantee, is not suitable for the stronger gas of winding-up oxidisability.Meanwhile, gas permeable brick type gas supply element occurred in West Europe, this gas supply element is big owing to adjustable tolerance scope, and can allow air-flow to be interrupted, and the blowing operation is had bigger adaptability, thereby be applied aborning.Thin metal aperture porous plug formula gas supply element had appearred again afterwards.But the obstruction accident still often takes place in the stove labour phase in above-mentioned bottom blowing device, influences the bottom blowing effect.
The utility model content
The utility model provides a kind of combined blown converter eddy flow bottom-blowing air feed element, has strengthened the bottom blowing effect of converter, has prolonged the end rifle life-span, has improved the rate of blowing of answering of combined blown converter, reduces the generation of end rifle obstruction accident easily.
The combined blown converter eddy flow bottom-blowing air feed element that the utility model provides is characterized in that: bottom-blowing air feed element is the spiral type metal tube, there is a straight-line segment ingress, spiral metal tube bottom, its length of straigh line scope is 10～25mm, spiral metal tube becomes the spiral type raised shape to the vertical axis with respect to the straight-line segment part upward, the angle of upper end gas outlet and vertical axis is θ, 5 °＜θ＜15 °.
Its beneficial effect of combined blown converter eddy flow bottom-blowing air feed element that the utility model provides is embodied in:
Tangential direction from the gas of spiral type metal tube nozzle ejection along nozzle edge enters in the metal pool, to the liquid metal in the molten bath except that producing axial impulse force, also can produce radially impulse force, the molten bath is produced to rotatablely move, improve spraying into the action condition of gas, increased stirring intensity the molten bath to the molten bath.Because gas passage is not vertical with bath surface, avoids molten steel vertically to pour into end rifle gas passage, thereby reduce the obstruction of end rifle.
The caliber of spiral type metal tube and pipe number in the pressure range that source of the gas provided, can satisfy the minimum and maximum stirring intensity of processing requirement, and the tolerance regulation range is big.
Description of drawings
Fig. 1 is the structural representation of combined blown converter eddy flow bottom-blowing air feed element.
Fig. 2 is the application example synoptic diagram of combined blown converter eddy flow bottom-blowing air feed element.
Embodiment
Specifically describe the utility model below in conjunction with accompanying drawing with embodiment.
As shown in Figure 1, combined blown converter eddy flow bottom-blowing air feed element is the spiral type metal tube, there is a straight-line segment at 1 place that enters the mouth, spiral metal tube bottom, its length of straigh line scope is 25mm, spiral metal tube becomes the spiral type raised shape to the vertical axis with respect to the straight-line segment part upward, the angle of upper end pneumatic outlet 2 places and vertical axis is θ, θ=10 °.
The application example of combined blown converter eddy flow bottom-blowing air feed element as shown in Figure 2, in rifle at the bottom of, arrange 3 eddy flow bottom-blowing air feed elements, 3 elements are evenly arranged on the circumference, and promptly the angle between each element is 120 °, and the diameter of this circumference is less than the diameter of end rifle.Among Fig. 21 is the projection of spiral metal tube bottom inlet, and 2 is the projection of upper end pneumatic outlet.
Every foundation rifle can comprise n eddy flow bottom blowing element (n 〉=3), the straight-line segment of n eddy flow bottom blowing element links to each other with air chamber, bottom blown gas enters spiral section, be blown into the molten bath by outlet, the gas that enters the molten bath removes the axial force of molten bath generation perpendicular to liquid level, also the molten bath is produced the radial force of parallel and a liquid level, increased stirring the molten bath.The outer parcel of spiral type metal tube refractory materials at combined blown converter eddy flow bottom-blowing air feed element.
Claims (1)
1. combined blown converter eddy flow bottom-blowing air feed element, it is characterized in that: bottom-blowing air feed element is the spiral type metal tube, there is a straight-line segment ingress, spiral metal tube bottom, its length of straigh line scope is 10～25mm, spiral metal tube becomes the spiral type raised shape to the vertical axis with respect to the straight-line segment part upward, the angle of upper end gas outlet and vertical axis is θ, 5 °＜θ＜15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205241853U CN201924035U (en) | 2010-09-10 | 2010-09-10 | Swirl bottom-blowing air supply element for combined blown converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205241853U CN201924035U (en) | 2010-09-10 | 2010-09-10 | Swirl bottom-blowing air supply element for combined blown converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201924035U true CN201924035U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205241853U Expired - Fee Related CN201924035U (en) | 2010-09-10 | 2010-09-10 | Swirl bottom-blowing air supply element for combined blown converter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385153A (en) * | 2017-09-05 | 2017-11-24 | 武汉科技大学 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
| CN110819756A (en) * | 2019-10-30 | 2020-02-21 | 德龙钢铁有限公司 | Method for improving bottom blowing gas stirring effect of combined blown converter |
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN114350884A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Bottom blowing element of combined blown converter and gas supply method |
| CN114807502A (en) * | 2021-01-28 | 2022-07-29 | 宝山钢铁股份有限公司 | Circular seam type cyclone converter bottom blowing element and application method thereof |
-
2010
- 2010-09-10 CN CN2010205241853U patent/CN201924035U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385153A (en) * | 2017-09-05 | 2017-11-24 | 武汉科技大学 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
| CN110819756A (en) * | 2019-10-30 | 2020-02-21 | 德龙钢铁有限公司 | Method for improving bottom blowing gas stirring effect of combined blown converter |
| CN110819756B (en) * | 2019-10-30 | 2024-01-30 | 德龙钢铁有限公司 | Method for improving stirring effect of bottom blowing gas of combined blown converter |
| CN114807502A (en) * | 2021-01-28 | 2022-07-29 | 宝山钢铁股份有限公司 | Circular seam type cyclone converter bottom blowing element and application method thereof |
| CN114807502B (en) * | 2021-01-28 | 2023-12-12 | 宝山钢铁股份有限公司 | Circular seam type rotary-flow rotary furnace bottom blowing element and application method thereof |
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN114350884A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Bottom blowing element of combined blown converter and gas supply method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20120910 |