CN105486091A - Oxygen lance for smelting of molten pool - Google Patents
Oxygen lance for smelting of molten pool Download PDFInfo
- Publication number
- CN105486091A CN105486091A CN201510956632.XA CN201510956632A CN105486091A CN 105486091 A CN105486091 A CN 105486091A CN 201510956632 A CN201510956632 A CN 201510956632A CN 105486091 A CN105486091 A CN 105486091A
- Authority
- CN
- China
- Prior art keywords
- oxygen rifle
- gun barrel
- oxygen
- bath smelting
- smelting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
- F27D2003/169—Construction of the lance, e.g. lances for injecting particles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides an oxygen lance for smelting of a molten pool and belongs to the technical field of oxygen blowing of smelting of non-ferrous metal molten pools and the technical field of blowing of smelting of steel. The oxygen lance comprises a lance pipe. One end of the lance pipe is a gas supply pipe, and the other end of the lance pipe is an exhaust pipe. A plurality of spray holes are formed in the exhaust end of the lance pipe, and the lance pipe is formed by sintering silicon nitride powder. The structure of the lance pipe can be simplified by changing the material of the lance pipe, in addition, protective gas or other cooling protection devices are not needed in the oxygen lance, the oxygen utilization rate can be increased, gas supply pressure is reduced, and therefore the smelting cost is reduced.
Description
Technical field
The invention provides a kind of bath smelting Novel oxygen lance, belong to non-ferrous metal bath smelting oxygen blast technical field and smelting iron and steel blowing technical field.
Background technology
Bath smelting is while tiny vulcanised ore concentrate adds melt, blasts air or industrial oxygen carries out melting to melt, completes rapidly the method for smelting of gas-liquid-solid alternate key reaction in liquid state molten pool.Plenum system has top-blown spray gun or imbeds the spray gun in molten bath.Air or industrial oxygen inject molten bath from oxygen lance spraying, not only participate in gas-liquid-solid between reaction, and to the larger stirring merit of high-temperature fusant input, make molten bath strong agitation, be beneficial to that material fully mixes, rapid melting.Known, oxygen rifle is the core technology of bath smelting technique, and its performance directly affects smelting efficiency and energy consumption.
The oxygen rifle of current use mostly is plane-of-weakness joint type multilayer sleeve oxygen rifle, and be the combined set of different inner diameters stainless steel sleeve pipe, internal layer boundling micropore is oxygen channel, and the outer line of rabbet joint is coolant guiding channel.Such oxygen rifle prior art Problems existing mainly contain following some:
(1) plane-of-weakness joint type multilayer sleeve oxygen rifle in actual use, and when pressure is less, pouring in down a chimney and stifled rifle phenomenon easily appears in oxygen rifle, and when pressure is larger, molten bath easily occurs expulsion events.
(2) there is problems such as burning rifle, stifled rifle, pour in down a chimney, have a strong impact on the service life of oxygen rifle, the frequency that rifle was keeped in repair and changed in blowing out is high, and changes oxygen rifle and cover brick cost intensive thereof, and blowing out is large to the normal Influence of production of equipment.
(3) oxygen rifle uses stainless steel sleeve pipe, and resistance to elevated temperatures is poor, easily occurs the problem such as scaling loss, erosion.
(4) protective gas is to the intensity of cooling of oxygen rifle, and namely cooling medium consumption and oxygen flow ratio, have material impact to life-span of oxygen lance.Relative to the single oxygen of winding-up same traffic, having in protective gas situation, such oxygen rifle needs larger supply gas pressure guarantee melting smelting furnace normally to run.
(5) oxygen rifle complex structure, has higher requirements to the design and working of the air supply system, pipe-line system, control system etc. of bath smelting furnace.
Summary of the invention
The object of the invention is to, for the deficiencies in the prior art, provide a kind of bath smelting oxygen rifle, simplification oxygen rifle structure, improves the stirring efficiency in molten bath, extends oxygen rifle service life, raising equipment productivity and reduction smelting cost.
Technical scheme of the present invention is, a kind of bath smelting oxygen rifle, comprises gun barrel, and one end of gun barrel is air feed end, and the other end is exhaust end, and the exhaust end of gun barrel is provided with multiple spray orifice, and gun barrel is made up of silicon nitride.
Further, gun barrel is the consistent pipeline of single internal diameter.
Further, the air feed end of gun barrel is provided with flaring type connector, and the internal diameter of flaring type connector increases along the exhaust end of gun barrel gradually to air feed extreme direction.
Further, gun barrel by alpha-silicon nitride powders hot injection moulding or injection moulding, and uses sintering aid once sintered obtained at ambient pressure.
Further, one end of flaring type connector is connected with gun barrel by adpting flange, and the other end installs air feed flange.
Further, the exhaust end end face of gun barrel is arc surface.
Further, spray orifice comprises the center of orifices being located at arc surface center and the edge spray orifice be distributed on arc surface.
Further, the quantity of spray orifice is 4-9.
Further, the aperture of spray orifice is 5mm-15mm.
The invention has the beneficial effects as follows:
1) relative to plane-of-weakness joint type multilayer sleeve oxygen rifle, adopt alpha-silicon nitride powders to sinter the oxygen rifle made in the present invention, 1300 DEG C ~ 1400 DEG C high temperature can be born, there is high temperature resistant and high strength, high rigidity performance, substantially increase the service life of oxygen rifle.
2) the oxygen rifle of this patent is alpha-silicon nitride powders sintering, has resistant to elevated temperatures advantage, simultaneously because it has the feature of high strength; washing away the impact of oxygen rifle of melt is little; so without the need to protective gas or cooling device, do not need to adopt combined set yet, simplify oxygen rifle structure.
3) spray orifice can multi-angle spray oxygen, thus centered by oxygen rifle to molten bath formed multiple directions produce impulsive force, can greatly improve melting bath stirring effect, shorten the melt tank mixing time, for bath smelting efficiently carry out good dynamic conditions is provided.
4) oxygen rifle is without the need to protective gas, or other Cooling protectors, can improve oxygen utilization efficiency, reduces supply gas pressure, thus saves smelting cost.
5) oxygen rifle flow resistance is little, effectively reduces the energy consumption of fusion process.
6) oxygen rifle is without the need to combined set, and structure is simple, facilitates processing and fabricating.
Accompanying drawing explanation
Fig. 1 is bath smelting Novel oxygen lance profile of the present invention;
Fig. 2 is specific embodiment 1 spray orifice distribution map;
Fig. 3 is specific embodiment 2 spray orifice distribution map.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
As shown in Figure 1, a kind of bath smelting oxygen rifle, comprises gun barrel 1, one end of gun barrel 1 is air feed end, and the other end is exhaust end, and the exhaust end of gun barrel 1 is provided with multiple spray orifice 7, gun barrel 1 by alpha-silicon nitride powders hot injection moulding or injection moulding, and uses sintering aid once sintered obtained at ambient pressure.Because silicon nitride material is a kind of high temperature ceramic material, 1300 DEG C ~ 1400 DEG C high temperature can be born, there is high temperature resistant and high strength, high rigidity performance, substantially increase the service life of oxygen rifle.
Plane-of-weakness joint type multilayer sleeve oxygen rifle generally adopts heat-resistance stainless steel to make, and needs protective gas, is because oxygen enters meeting and melt generation oxidation reaction behind molten bath; produce amount of heat; heat easily gathers at jet expansion, protects not in place, then by serious scaling loss oxygen rifle.So add logical compressed air or compressed nitrogen in the middle of the line of rabbet joint at oxygen channel skin, and oxygen sprays simultaneously and enters, thus reduces the contact area of melt and oxygen rifle, has certain cooling effect to oxygen rifle.In actual production, the cooling protection limited use of outer layer sleeve, burns rifle, stifled rifle problem is still serious.The oxygen rifle of this patent is alpha-silicon nitride powders sintering, has resistant to elevated temperatures advantage, has high strength simultaneously due to it, and washing away the impact of oxygen rifle of melt is little.Just because of this, the oxygen rifle of this patent, without the need to protective gas or cooling device, does not need to adopt combined set yet.
Gun barrel 1 is the consistent pipeline of single internal diameter, and the air feed end of described gun barrel 1 is provided with flaring type connector 3, and the internal diameter of flaring type connector 3 increases along the exhaust end of gun barrel gradually to air feed extreme direction; One end of flaring type connector 3 is connected with gun barrel 1 by adpting flange 2, and the other end installs air feed flange 4.
Oxygen rifle exhaust end inserts in molten bath, to spray oxygen; Air feed end is generally by metal hose air feed, and flaring type connector can play the effect increasing admission pressure and air velocity.Oxygen rifle is without the need to protective gas, or other Cooling protectors, can improve oxygen utilization efficiency, reduces supply gas pressure, thus saves smelting cost; Oxygen rifle flow resistance is little, effectively reduces the energy consumption of fusion process; Oxygen rifle is without the need to combined set, and structure is simple, facilitates processing and fabricating.
The exhaust end end face of gun barrel 1 is arc surface 5, and spray orifice comprises the center of orifices 6 being located at arc surface 5 center and the edge spray orifice 7 be distributed on arc surface 5; The aperture of spray orifice 7 is 5mm-15mm.Spray orifice can spray oxygen from different perspectives, to the impulsive force of the multiple directions of melt, can greatly improve melting bath stirring effect, shorten the melt tank mixing time, for bath smelting efficiently carry out good dynamic conditions is provided.
As shown in Figure 2, be provided with 5 spray orifices, 4 edge spray orifices 7 are symmetric.
Embodiment 2
As shown in Figure 3, be provided with 4 spray orifices, 3 edge spray orifices 7 are in asymmetric distribution.
All the other structures are consistent with embodiment 1.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Claims (9)
1. a bath smelting oxygen rifle, comprise gun barrel (1), one end of gun barrel (1) is air feed end, the other end is exhaust end, the exhaust end of gun barrel (1) is provided with multiple spray orifice (7), it is characterized in that, described gun barrel (1) is made up of silicon nitride.
2. bath smelting oxygen rifle according to claim 1, is characterized in that, described gun barrel (1) is the consistent pipeline of single internal diameter.
3. bath smelting oxygen rifle according to claim 1, it is characterized in that, the air feed end of described gun barrel (1) is provided with flaring type connector (3), and the internal diameter of flaring type connector (3) increases along the exhaust end of gun barrel gradually to air feed extreme direction.
4. according to one of claim 1-3 described bath smelting oxygen rifle, it is characterized in that, described gun barrel (1) by alpha-silicon nitride powders hot injection moulding or injection moulding, and uses sintering aid once sintered obtained at ambient pressure.
5. bath smelting oxygen rifle according to claim 3, is characterized in that, one end of described flaring type connector (3) is connected with gun barrel (1) by adpting flange (2), other end installation air feed flange (4).
6. according to one of claim 1-3 described bath smelting oxygen rifle, it is characterized in that, the exhaust end end face of described gun barrel (1) is arc surface (5).
7. bath smelting oxygen rifle according to claim 6, it is characterized in that, described spray orifice comprises the center of orifices (6) being located at arc surface (5) center and the edge spray orifice (7) be distributed on arc surface (5).
8. according to one of claim 1-3 described bath smelting oxygen rifle, it is characterized in that, the quantity of described spray orifice (7) is 4-9.
9. according to one of claim 1-3 described bath smelting oxygen rifle, it is characterized in that, the aperture of described spray orifice (7) is 5mm-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510956632.XA CN105486091A (en) | 2015-12-18 | 2015-12-18 | Oxygen lance for smelting of molten pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510956632.XA CN105486091A (en) | 2015-12-18 | 2015-12-18 | Oxygen lance for smelting of molten pool |
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| Publication Number | Publication Date |
|---|---|
| CN105486091A true CN105486091A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510956632.XA Pending CN105486091A (en) | 2015-12-18 | 2015-12-18 | Oxygen lance for smelting of molten pool |
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| CN (1) | CN105486091A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288814A (en) * | 2016-08-30 | 2017-01-04 | 航天恒星科技有限公司 | A kind of immersion lance head |
| CN109163565A (en) * | 2018-09-10 | 2019-01-08 | 中国恩菲工程技术有限公司 | Immersion spray gun and smelting device system |
| EP4150279B1 (en) | 2020-05-14 | 2023-09-20 | SMS Group GmbH | Gas injection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102122A (en) * | 1996-09-30 | 1998-04-21 | Kawasaki Steel Corp | Oxygen feeding lance for refining molten metal |
| CN2789289Y (en) * | 2005-03-14 | 2006-06-21 | 欧阳承德 | Air-jet loom collection energy-saving main nozzle |
| CN2898007Y (en) * | 2006-03-17 | 2007-05-09 | 成都绿水科技有限公司 | Efficient fluid jetter |
| CN202328208U (en) * | 2011-11-23 | 2012-07-11 | 张昭贵 | Spray gun burner |
| CN102605135A (en) * | 2012-03-21 | 2012-07-25 | 沈阳东冶汉森冶金装备有限公司 | Converter cone oxygen lance with surface coating |
| CN102839254A (en) * | 2012-09-18 | 2012-12-26 | 苏州宝联重工股份有限公司 | Non-sticky steel converter oxygen lance and manufacturing method thereof |
| CN204661752U (en) * | 2015-05-25 | 2015-09-23 | 中条山有色金属集团有限公司 | A kind of oxygen-enriched bottom-blowing stove oxygen rifle |
-
2015
- 2015-12-18 CN CN201510956632.XA patent/CN105486091A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102122A (en) * | 1996-09-30 | 1998-04-21 | Kawasaki Steel Corp | Oxygen feeding lance for refining molten metal |
| CN2789289Y (en) * | 2005-03-14 | 2006-06-21 | 欧阳承德 | Air-jet loom collection energy-saving main nozzle |
| CN2898007Y (en) * | 2006-03-17 | 2007-05-09 | 成都绿水科技有限公司 | Efficient fluid jetter |
| CN202328208U (en) * | 2011-11-23 | 2012-07-11 | 张昭贵 | Spray gun burner |
| CN102605135A (en) * | 2012-03-21 | 2012-07-25 | 沈阳东冶汉森冶金装备有限公司 | Converter cone oxygen lance with surface coating |
| CN102839254A (en) * | 2012-09-18 | 2012-12-26 | 苏州宝联重工股份有限公司 | Non-sticky steel converter oxygen lance and manufacturing method thereof |
| CN204661752U (en) * | 2015-05-25 | 2015-09-23 | 中条山有色金属集团有限公司 | A kind of oxygen-enriched bottom-blowing stove oxygen rifle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288814A (en) * | 2016-08-30 | 2017-01-04 | 航天恒星科技有限公司 | A kind of immersion lance head |
| CN109163565A (en) * | 2018-09-10 | 2019-01-08 | 中国恩菲工程技术有限公司 | Immersion spray gun and smelting device system |
| CN109163565B (en) * | 2018-09-10 | 2024-01-26 | 中国恩菲工程技术有限公司 | Submerged lance and smelting equipment system |
| EP4150279B1 (en) | 2020-05-14 | 2023-09-20 | SMS Group GmbH | Gas injection device |
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Application publication date: 20160413 |
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| RJ01 | Rejection of invention patent application after publication |