CN105154617A - Spin type secondary combustion oxygen lance and application thereof - Google Patents
Spin type secondary combustion oxygen lance and application thereof Download PDFInfo
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- CN105154617A CN105154617A CN201510642817.3A CN201510642817A CN105154617A CN 105154617 A CN105154617 A CN 105154617A CN 201510642817 A CN201510642817 A CN 201510642817A CN 105154617 A CN105154617 A CN 105154617A
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- oxygen
- secondary combustion
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- oxygen lance
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Abstract
The invention provides a spin type secondary combustion oxygen lance which comprises an oxygen lance body and a main oxygen nozzle, wherein the oxygen lance body comprises a lance body outer tube, a middle-layer riser and an oxygen lance oxygen tube, which are orderly sleeved from outside to inside; a plurality of secondary oxygen holes are formed in the oxygen lance body on the circumferential direction, and the secondary oxygen holes penetrate through the lance body outer tube and the middle-layer riser and are tangent to the oxygen lance oxygen tube; the axis of each secondary oxygen hole is not intersected with the axis of the oxygen lance body, and an included angle alpha is formed. The secondary oxygen flow generated by the spin type secondary combustion oxygen lance simultaneously has axial, radial and tangential velocity components. As secondary combustion reaction equipment in converter steelmaking, the spin type secondary combustion oxygen lance forms the spin type downward secondary oxygen flow in a converter, so that the secondary combustion reaction area is expanded. Meanwhile, the secondary combustion heat tends to uniform distribution, the radial scouring and eroding of high-temperature furnace gas for the furnace lining of the converter is relieved, the secondary combustion ratio is increased, and the efficiency of passing back to a molten pool of heat generated by secondary combustion are improved.
Description
Technical field
The invention belongs to steel-making converter equipment technical field, be specifically related to a kind of self-rotary Oxygen Lance With Secondary Combustion and application thereof.
Background technology
In convertor steelmaking process, the carbon in molten iron and oxygen generation primary combustion are reacted and are generated carbon monoxide and enter furnace gas, and the oxygen generation secondary combustion subsequently in carbon monoxide and furnace gas is reacted and generated carbonic acid gas.These two combustion reactionss are exothermic process, and wherein secondary combustion reaction liberated heat is about 2/3rds of whole flame mechanism heat release total amount.Therefore, the heat how farthest to utilize secondary combustion to produce on the spot in converter inside is the key realizing the high efficiente callback of converter gas chemical energy.Thus, this part heat of recovery can be utilized for increasing the loading ratio of the such as cold burden such as steel scrap and surrogate thereof, thus reduce hot metal ratio, finally realize energy-saving and emission-reduction.
For improving the degree of secondary combustion, traditional method arranges some secondary oxygen holes along oxygen rifle radial direction being positioned at certain position of more than oxygen rifle main oxygen shower nozzle, reacts with the carbon monoxide generation secondary combustion produced in secondary oxygen stream and furnace gas.
But the drawback of above-mentioned traditional method is that secondary combustion conversion zone is mainly positioned at the local of secondary oxygen stream, limited use is improved for secondary combustion degree; And because secondary oxygen hole radially distributes, this causes will being washed away furnace lining by localized hyperthermia's furnace gas of secondary combustion reaction heating, thus accelerates lining erosion.
For solving the problem, needing a kind of Oxygen Lance With Secondary Combustion of development and Design, realizing furnace gas chemical energy high efficiente callback in converter, alleviate localized hyperthermia's furnace gas simultaneously and erosion is washed away to converter lining.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of self-rotary Oxygen Lance With Secondary Combustion, by producing self-rotary secondary oxygen stream, expand secondary combustion conversion zone, alleviate high-temperature furnace gas simultaneously and erosion is washed away to converter lining, thus the high efficiente callback realized converter gas chemical energy, and strengthen the receptivity entering the cold burdens such as stove steel scrap and surrogate thereof, energy-saving and emission-reduction.
Technical scheme of the present invention is to provide a kind of self-rotary Oxygen Lance With Secondary Combustion, comprise oxygen gun body and main oxygen shower nozzle, described oxygen gun body comprises the body of a gun outer tube, middle level marine riser and the oxygen rifle oxygen pipe that are set with setting from outside to inside successively, on described oxygen gun body, circumference is provided with multiple secondary oxygen hole, body of a gun outer tube and middle level marine riser are run through in described secondary oxygen hole, and tangent with oxygen rifle oxygen pipe, the axis in secondary oxygen hole and the axis of oxygen gun body non-intersect, and form angle α.
Further, described secondary oxygen hole and main oxygen shower nozzle are at a distance of 400 ~ 1600mm, and the heat that the then secondary combustion too far away of the main oxygen shower nozzle of secondary oxygen pitch-row produces effectively to molten bath passback, if the main oxygen shower nozzle of secondary oxygen pitch-row is too near, easily cannot be blocked by the drop of splash.
Further, described secondary oxygen hole has 3 ~ 5, and the quantity in secondary oxygen hole meets the prerequisite not affecting oxygen gun body structural stability and require, crosses and is not easy at least to form rotary furnace gas flow field, crosses and can reduce oxygen gun body structural strength at most.
Further, described secondary oxygen hole has 4.
Further, equidistantly distribute between described multiple secondary oxygen hole.
Further, the angle α that the described axis in secondary oxygen hole and the axis of oxygen gun body are formed is 30 ° ~ 60 °.
Further, the angle α that the described axis in secondary oxygen hole and the axis of oxygen gun body are formed is 60 °.
Further, the aperture in described secondary oxygen hole is 3mm ~ 7mm, meets the stability requirement of oxygen gun body structure.
This self-rotary Oxygen Lance With Secondary Combustion provided by the invention is used as the secondary combustion conversion unit in converter steelmaking, expands secondary combustion conversion zone and alleviates high-temperature furnace gas simultaneously and wash away erosion to converter lining.
Principle of work of the present invention is the decoration form in secondary oxygen hole is that its axis and oxygen gun body axis are non-intersect, and form angle α, simultaneously its internal diameter and oxygen rifle oxygen bore tangent, make the secondary oxygen stream drawing secondary oxygen hole have axial, radial and tangential speed component simultaneously, thus form rotary downward secondary oxygen stream in converter inside.
Compared with prior art, beneficial effect of the present invention:
(1) this self-rotary Oxygen Lance With Secondary Combustion provided by the invention expands secondary combustion conversion zone by forming rotary secondary oxygen stream in converter inside, makes secondary combustion heat be tending towards being uniformly distributed simultaneously.
(2) this self-rotary Oxygen Lance With Secondary Combustion provided by the invention washes away erosion by alleviating the radial direction of high-temperature furnace gas to converter lining at converter inside formation rotary secondary oxygen stream.
(3) this self-rotary Oxygen Lance With Secondary Combustion provided by the invention is by forming downward secondary oxygen stream in converter inside, and post-combustion rate improves 15% ~ 20%, and the efficiency that the heat that secondary combustion produces returns to molten bath improves 5% ~ 10%.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic cross-section along A-A direction in Fig. 1.
Fig. 3 is the structural representation along B-B direction in Fig. 2.
Fig. 4 is the converter gas rotational flow effect schematic diagram of oxygen rifle secondary oxygen of the present invention miscarriage life.
Description of reference numerals: 1, body of a gun outer tube; 2, middle level marine riser; 3, secondary oxygen hole; 4, oxygen rifle oxygen pipe; 5, oxygen gun body; 6, main oxygen shower nozzle.
Embodiment
Embodiment 1:
In order to overcome existing oxygen rifle radial direction arrange secondary oxygen hole make secondary combustion degree improve limited use, and easily cause the radial direction of high-temperature furnace gas to converter lining to wash away the problem of erosion, present embodiments provide a kind of as Fig. 1, Fig. 2, self-rotary Oxygen Lance With Secondary Combustion shown in Fig. 3 and Fig. 4, comprise oxygen gun body 5 and main oxygen shower nozzle 6, described oxygen gun body 5 comprises the body of a gun outer tube 1 being set with setting from outside to inside successively, middle level marine riser 2 and oxygen rifle oxygen pipe 4, on described oxygen gun body 5, circumference is provided with multiple secondary oxygen hole 3, body of a gun outer tube 1 and middle level marine riser 2 are run through in described secondary oxygen hole 3, and it is tangent with oxygen rifle oxygen pipe 4, the axis in secondary oxygen hole 3 and the axis of oxygen gun body 5 non-intersect, and form angle α.
The present invention adopts the decoration form in secondary oxygen hole 3 to be that its axis and oxygen gun body 5 axis are non-intersect, and form angle α, simultaneously its internal diameter and oxygen rifle oxygen pipe 4 internal diameter tangent, make the secondary oxygen stream drawing secondary oxygen hole 3 have axis simultaneously, radial direction and tangential speed component, thus form rotary downward secondary oxygen stream in converter inside, this design expands secondary combustion conversion zone, make secondary combustion heat be tending towards being uniformly distributed simultaneously, alleviate the radial direction of high-temperature furnace gas to converter lining and wash away erosion, the efficiency that the heat that improve secondary combustion generation returns to molten bath.
Embodiment 2:
As shown in Figure 2, present embodiments provide a kind of self-rotary Oxygen Lance With Secondary Combustion, comprise oxygen gun body 5 and main oxygen shower nozzle 6, oxygen gun body 5 comprises the body of a gun outer tube 1 being set with setting from outside to inside successively, middle level marine riser 2 and oxygen rifle oxygen pipe 4, on the oxygen gun body 5 being positioned at main oxygen shower nozzle more than 6 1000mm, circumference is provided with 4 secondary oxygen holes 3, 4 secondary oxygen holes 3 equidistantly distribute in oxygen gun body 5 circumference, the aperture in secondary oxygen hole 3 is 5mm, the axis in secondary oxygen hole 3 and the axis of oxygen gun body 5 non-intersect, and form the angle of 60 °, body of a gun outer tube 1 and middle level marine riser 2 are run through in secondary oxygen hole 3, and it is tangent with oxygen rifle oxygen pipe 4, oxygen in oxygen rifle oxygen pipe 4 tangentially enters secondary oxygen hole 3 along oxygen pipe, and finally form rotary downward secondary oxygen stream in converter inside, the converter gas rotational flow effect of its secondary oxygen miscarriage life as shown in Figure 4.
This self-rotary Oxygen Lance With Secondary Combustion that the present embodiment provides is used as the secondary combustion conversion unit in converter steelmaking, expand secondary combustion conversion zone, compared to traditional oxygen rifle, this self-rotary Oxygen Lance With Secondary Combustion is adopted in converter steelmaking, its post-combustion rate improves 20%, and the efficiency that the heat that secondary combustion produces returns to molten bath can improve 10%.
Embodiment 3:
Present embodiments provide a kind of self-rotary Oxygen Lance With Secondary Combustion, comprise oxygen gun body 5 and main oxygen shower nozzle 6, oxygen gun body 5 comprises the body of a gun outer tube 1 being set with setting from outside to inside successively, middle level marine riser 2 and oxygen rifle oxygen pipe 4, on the oxygen gun body 5 being positioned at main oxygen shower nozzle more than 6 400mm, circumference is provided with 3 secondary oxygen holes 3, 3 secondary oxygen holes 3 equidistantly distribute in oxygen gun body 5 circumference, the aperture in secondary oxygen hole 3 is 7mm, the axis in secondary oxygen hole 3 and the axis of oxygen gun body 5 non-intersect, and form the angle of 30 °, body of a gun outer tube 1 and middle level marine riser 2 are run through in secondary oxygen hole 3, and it is tangent with oxygen rifle oxygen pipe 4, oxygen in oxygen rifle oxygen pipe 4 tangentially enters secondary oxygen hole 3 along oxygen pipe, and finally form rotary downward secondary oxygen stream in converter inside.
This self-rotary Oxygen Lance With Secondary Combustion that the present embodiment provides is used as the secondary combustion conversion unit in converter steelmaking, expand secondary combustion conversion zone, compared to traditional oxygen rifle, this self-rotary Oxygen Lance With Secondary Combustion is adopted in converter steelmaking, its post-combustion rate improves 15%, and the efficiency that the heat that secondary combustion produces returns to molten bath can improve 5%.
Embodiment 4:
Present embodiments provide a kind of self-rotary Oxygen Lance With Secondary Combustion, comprise oxygen gun body 5 and main oxygen shower nozzle 6, oxygen gun body 5 comprises the body of a gun outer tube 1 being set with setting from outside to inside successively, middle level marine riser 2 and oxygen rifle oxygen pipe 4, on the oxygen gun body 5 being positioned at main oxygen shower nozzle more than 6 1600mm, circumference is provided with 5 secondary oxygen holes 3, 5 secondary oxygen holes 3 equidistantly distribute in oxygen gun body 5 circumference, the aperture in secondary oxygen hole 3 is 3mm, the axis in secondary oxygen hole 3 and the axis of oxygen gun body 5 non-intersect, and the angle that shape is at 45 °, body of a gun outer tube 1 and middle level marine riser 2 are run through in secondary oxygen hole 3, and it is tangent with oxygen rifle oxygen pipe 4, oxygen in oxygen rifle oxygen pipe 4 tangentially enters secondary oxygen hole 3 along oxygen pipe, and finally form rotary downward secondary oxygen stream in converter inside.
This self-rotary Oxygen Lance With Secondary Combustion that the present embodiment provides is used as the secondary combustion conversion unit in converter steelmaking, expand secondary combustion conversion zone, compared to traditional oxygen rifle, this self-rotary Oxygen Lance With Secondary Combustion is adopted in converter steelmaking, its post-combustion rate improves 18%, and the efficiency that the heat that secondary combustion produces returns to molten bath can improve 7%.
In sum, this self-rotary Oxygen Lance With Secondary Combustion provided by the invention is by forming downward secondary oxygen stream in converter inside, and post-combustion rate improves 15% ~ 20%, and the efficiency that the heat that secondary combustion produces returns to molten bath improves 5% ~ 10%.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. a self-rotary Oxygen Lance With Secondary Combustion, comprise oxygen gun body (5) and main oxygen shower nozzle (6), it is characterized in that: described oxygen gun body (5) comprises the body of a gun outer tube (1) being set with setting from outside to inside successively, middle level marine riser (2) and oxygen rifle oxygen pipe (4), the upper circumference of described oxygen gun body (5) is provided with multiple secondary oxygen hole (3), described secondary oxygen hole (3) runs through body of a gun outer tube (1) and middle level marine riser (2), and it is tangent with oxygen rifle oxygen pipe (4), the axis in secondary oxygen hole (3) and the axis of oxygen gun body (5) non-intersect, and form angle α.
2. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 1, is characterized in that: described secondary oxygen hole (3) and main oxygen shower nozzle (6) are at a distance of 400 ~ 1600mm.
3. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 1, is characterized in that: described secondary oxygen hole (3) has 3 ~ 5.
4. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 3, is characterized in that: described secondary oxygen hole (3) has 4.
5. the self-rotary Oxygen Lance With Secondary Combustion as described in claim 1 or 3 or 4, is characterized in that: equidistantly distribute between described multiple secondary oxygen hole (3).
6. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 1, is characterized in that: the angle α that the axis of described secondary oxygen hole (3) and the axis of oxygen gun body (5) are formed is 30 ° ~ 60 °.
7. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 1, is characterized in that: the angle α that the axis of described secondary oxygen hole (3) and the axis of oxygen gun body (5) are formed is 60 °.
8. self-rotary Oxygen Lance With Secondary Combustion as claimed in claim 1 or 2, is characterized in that: the aperture of described secondary oxygen hole (3) is 3mm ~ 7mm.
9. the application of the self-rotary Oxygen Lance With Secondary Combustion as described in any one of claim 1 ~ 8, is characterized in that: this self-rotary Oxygen Lance With Secondary Combustion is used as the secondary combustion conversion unit in converter steelmaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510642817.3A CN105154617A (en) | 2015-10-08 | 2015-10-08 | Spin type secondary combustion oxygen lance and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510642817.3A CN105154617A (en) | 2015-10-08 | 2015-10-08 | Spin type secondary combustion oxygen lance and application thereof |
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| CN105154617A true CN105154617A (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510642817.3A Pending CN105154617A (en) | 2015-10-08 | 2015-10-08 | Spin type secondary combustion oxygen lance and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018035441A (en) * | 2016-09-02 | 2018-03-08 | ポスコＰｏｓｃｏ | Lance and operation method using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106499A (en) * | 1986-09-15 | 1987-04-22 | 化学工业部炭黑工业研究设计所 | Produce the method and apparatus of soft carbon |
| CN2096570U (en) * | 1991-05-28 | 1992-02-19 | 冶金工业部鞍山热能研究院设备研制厂 | Double-decker shunt oxygen lance for converting steel |
| CN1246598A (en) * | 1998-09-03 | 2000-03-08 | 株式会社日立制作所 | Combustion melting furnace and combustion melting method and waste heat utilization generating system |
| CN2603809Y (en) * | 2003-02-24 | 2004-02-18 | 宝山钢铁股份有限公司 | Oxygen spray pistol of revolving furnace |
-
2015
- 2015-10-08 CN CN201510642817.3A patent/CN105154617A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106499A (en) * | 1986-09-15 | 1987-04-22 | 化学工业部炭黑工业研究设计所 | Produce the method and apparatus of soft carbon |
| CN2096570U (en) * | 1991-05-28 | 1992-02-19 | 冶金工业部鞍山热能研究院设备研制厂 | Double-decker shunt oxygen lance for converting steel |
| CN1246598A (en) * | 1998-09-03 | 2000-03-08 | 株式会社日立制作所 | Combustion melting furnace and combustion melting method and waste heat utilization generating system |
| CN2603809Y (en) * | 2003-02-24 | 2004-02-18 | 宝山钢铁股份有限公司 | Oxygen spray pistol of revolving furnace |
Non-Patent Citations (1)
| Title |
|---|
| 王令福主编: "《炼钢厂设计原理》", 30 April 2009 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018035441A (en) * | 2016-09-02 | 2018-03-08 | ポスコＰｏｓｃｏ | Lance and operation method using the same |
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Application publication date: 20151216 |
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