CN102312041B - Anti-corrosion method for oxygen lance nozzle and oxygen lance nozzle - Google Patents
Anti-corrosion method for oxygen lance nozzle and oxygen lance nozzle Download PDFInfo
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- CN102312041B CN102312041B CN 201110243806 CN201110243806A CN102312041B CN 102312041 B CN102312041 B CN 102312041B CN 201110243806 CN201110243806 CN 201110243806 CN 201110243806 A CN201110243806 A CN 201110243806A CN 102312041 B CN102312041 B CN 102312041B
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- oxygen lance
- blow head
- face
- lance blow
- shower nozzle
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Abstract
The invention discloses an anti-corrosion method for oxygen lance nozzles and an oxygen lance nozzle, belonging to the technical field of steel smelting in a converter. According to the invention, the technology of extrusion molding is employed, which enables crystal grains at a nozzle head face to arrange more compactly and enables the nozzle head face to have enhanced capacity of resisting erosion and immersion by slag and molten steel; an alloy heat insulation material is sprayed on the nozzle head face to form a thermal insulation layer, thereby enhancing heat insulation and radiation insulation functions of the nozzle head face, avoiding binding of copper and steel at a high temperature and enabling the oxygen lance nozzle to have better high temperature resistance performance. Therefore, the method provided in the invention enables the service life of the oxygen lance nozzle to be substantially prolonged and production cost to be reduced.
Description
Technical field
The present invention relates to oxygen lance blow head that a kind of converter steelmaking uses and the anti-corrode method of oxygen lance blow head.
Background technology
In converter steelmaking, oxygen is to supply with converter molten pool by complex-shaped oxygen lance blow head to carry out smelting operation, and oxygen lance blow head rational in infrastructure can obtain best smelting operation, facilitation slag, converting process is steady, reduce splash, recovery rate of iron is high, and has improved oxygen utilization rate.Shower nozzle is to form through forging or casting processing with the good red copper of thermal conductivity as the crucial building block of oxygen rifle.The Working environment of shower nozzle is extremely abominable, and the reaction zone temperature that forms after the oxygen flow ejection up to approximately spending 2000 more, and shower nozzle easily damages under this environment.The shower nozzle source of damage is as follows: the washing away and the rapid heat cycle effect of (1) high-temperature steel slag.Shower nozzle is subjected to washing away and soaking of high temperature and the slag that constantly splashes and molten steel, little by little melting loss attenuation; Due to temperature rapid heat cycle continually, the shower nozzle end produces be full of cracks, along with the progressively expansion of continuity be full of cracks of duration of service, until end infiltration and even leak is scrapped; (2) cooling bad.Nozzle surface crystal grain is heated and grows up, and after damaging, the crystal grain in shower nozzle centre is compared with new shower nozzle and grown up 5～10 times, because growing up of crystal grain causes spray orifice distortion, oxygen jet performance depreciation.(3) shower nozzle end face steel bonding.Control improperly due to the rifle position, or sprinkler performance is not good and steel bonding causes end face cooling conditions variation, and the life-span reduces.The middle part of porous nozzle jet forms negative pressuren zone, foamy slag and the molten drop slag of carrying secretly are constantly sucked, when high temperature and molten drop with oxidisability hit and stick to the shower nozzle end face in a flash, copper is molten state, steel and copper form Fe-Cu sosoloid and are bonded together firmly, if affected the thermal conductivity of shower nozzle, red-hot molten drop bonding occur again, can occur [Fe]-[O] reaction, liberated heat makes the copper fusing, and shower nozzle damages.
In recent years, along with increasing substantially of China's iron and steel output, the continuous lifting of process for making was one of problem of paying close attention in the industry the work-ing life of oxygen lance blow head end face always.Oxygen lance blow head end face resist technology was once repeatedly attempted by the insider, but its defective (fusibility) on material is never well overcome.At present, mainly contain for the oxygen lance blow head Adopts measure: increase protective guard at end face, forge casting combination etc.But, increase protective guard at end face, because the material of making protective guard is not determined, this technology operability is not strong at present; After copper material is cast as definite shape and forge the casting combination technology, carry out the processing that forges repeatedly under heating state, the degree of crystallinity of copper is improved, density strengthens, but metallic substance repeatedly can crack under the alternating stress load effect, the fatigue phenomenon such as fracture, this technology can not fundamentally solve the damageable problem of shower nozzle.
Summary of the invention
In order to overcome above shortcomings in prior art, the invention provides a kind of anti-corrode method of oxygen lance blow head, in the work-ing life that it can extend oxygen lance blow head greatly, reduce production costs.
The inventive method is achieved by the following technical solution: a kind of oxygen lance blow head is prevented the corrode method, and its special character is that it adopts following steps: 1) oxygen lance blow head with casting is processed into desired size; 2) the shower nozzle end face of described oxygen lance blow head pushed; 3) to the shower nozzle end face of described oxygen lance blow head remove contamination, polished finish; 4) oxygen lance blow head after cleaning carries out preheating, and forms thermofin at the shower nozzle end face spraying alloy lagging material of described oxygen lance blow head.
The present invention adopts extruding shaping technique in the oxygen lance blow head production process, the shower nozzle end grain is arranged tightr, has improved the intensity of shower nozzle end face, and washing away with the immersion ability of the anti-slag of shower nozzle end face and molten steel is stronger.The present invention has strengthened the heat insulation radiation function of shower nozzle end face by forming thermofin at the spraying of the nozzle surface after extruding one deck alloy lagging material, has avoided copper and steel bonding at high temperature, makes shower nozzle more high temperature resistant.
Further scheme is that described alloy lagging material is the alumina-silicate ceramic fibre spray material.The alumina-silicate ceramic fibre spray material has effectively insulating, and is high temperature resistant, bonding firmly, characteristics of difficult drop-off under hot environment particularly have the performance of good weather-proof, antiscour.
For ease of the process operation of oxygen lance blow head, and reduce manufacturing procedure, the described oxygen lance blow head structure that is formed in one.Adopt integrated formed structure, the result of use of product is strengthened.
The present invention also provides a kind of oxygen lance blow head, its technical scheme that adopts is: a kind of oxygen lance blow head, comprise sprayer body, its special character is: the sprayer body end face of described sprayer body has the thermofin of alloy lagging material formation through compactly extruding at the surface spraying of described sprayer body end face.
In order to improve heat insulation, the high temperature resistant and scour resistance of oxygen lance blow head end face, described thermofin is alumina-silicate ceramic fibre spray material thermofin.
For ease of the process operation of oxygen lance blow head, reduce manufacturing procedure, described sprayer body is integrated the casting structure.
The invention has the beneficial effects as follows: by adopt extruding shaping technique in the shower nozzle production process, the shower nozzle end grain is arranged tightr, improved the intensity of shower nozzle end face, washing away with the immersion ability of its anti-slag and molten steel is stronger, simultaneously, be sprayed on the lagging material of shower nozzle end face, strengthened the heat insulation radiation function of shower nozzle end face, avoided copper and steel bonding at high temperature, made oxygen lance spraying high temperature resistant first watch.The present invention has solved well affects the oxygen lance blow head three large technical barriers in work-ing life: the washing away and the rapid heat cycle effect of high-temperature steel slag; Cooling bad; The easy steel bonding of shower nozzle end face.Therefore, the present invention can extend the work-ing life of oxygen lance blow head greatly, can improve 10% left and right (approximately extending about the 20--50 stove work-ing life of every rifle) work-ing life of shower nozzle, for the significant effect that reduced production costs, calculate according to output of steel, the expense of per shower nozzle saving in time can reach up to ten million units.Therefore, development of the present invention and popularization have significant economic implications.
Description of drawings
Fig. 1 is the structural representation of oxygen lance blow head of the present invention;
In figure, 1, thermofin, 2, the sprayer body end face, 3, sprayer body.
Embodiment
The present invention is further illustrated below by the embodiment of indefiniteness:
A kind of oxygen lance blow head is prevented the corrode method, and it adopts following steps: 1) at first the oxygen lance blow head of casting is processed into desired size; 2) utilize pressing machine that the shower nozzle end face of the oxygen lance blow head that processes is pushed, the shower nozzle end grain is arranged tightr; 3) to remove contamination through the shower nozzle end face of oxygen lance blow head of extruding, polished finish, make it reach the former gloss of metal; 4) oxygen lance blow head after cleaning carries out preheating, forms thermofin at shower nozzle end face spraying alloy lagging material when reaching certain temperature.The alloy lagging material that adopts in the present embodiment is the alumina-silicate ceramic fibre spray material.It is the effectively insulating characteristics of utilizing refractory fibre, through the dedicated fiber spraying equipment, utilizes high-pressure air that fiber and high-temperature agglomerant are evenly mixed postadhesion in the shower nozzle end face, forms fiber coating insulating refractory layer.High-temperature agglomerant is the fiber matrix material of alumina-silicate ceramic fibre matching operation, have high temperature resistant, bonding firmly, adeciduate characteristics under hot environment particularly, energy-saving effect is remarkable.Performance with good weather-proof, antiscour can improve thermotolerance and the scour resistance of fiber.The thermofin that this alloy lagging material forms is high temperature resistant, difficult drop-off, has strengthened heat insulation radiation, the scour resistance of shower nozzle end face, has avoided copper and steel bonding at high temperature, makes oxygen lance spraying high temperature resistant first watch, has extended the work-ing life of oxygen lance blow head.
For ease of the process operation of oxygen lance blow head, and reduce manufacturing procedure, the oxygen lance blow head shown in the present embodiment adopts integrated formed structure.
Other parts of the present embodiment adopt prior art, do not repeat them here.
Certainly, the alloy lagging material described in the inventive method can be also other lagging materials of prior art.
Embodiment 2
As shown in drawings, be a kind of oxygen lance blow head, comprise sprayer body 3, the sprayer body end face 2 of described sprayer body 3 has the thermofin 1 of alloy lagging material formation through compactly extruding at the surface spraying of sprayer body end face 2.Thermofin 1 in the present embodiment is alumina-silicate ceramic fibre spray material thermofin.Alumina-silicate ceramic fibre spray material thermofin is to utilize the dedicated fiber spraying equipment, with high-pressure air, refractory fibre and high-temperature agglomerant is evenly mixed postadhesion in the shower nozzle end face, forms fiber coating insulating refractory layer.This thermofin is high temperature resistant, difficult drop-off, has strengthened heat insulation radiation, the scour resistance of shower nozzle end face, has avoided copper and steel bonding at high temperature, makes oxygen lance spraying high temperature resistant first watch, has extended the work-ing life of oxygen lance blow head.
Certainly, the thermofin described in the present invention can be also the thermofin of other lagging materials formation of prior art.
Sprayer body in the present embodiment can adopt integrated structure or integrated formed structure.For ease of the process operation of oxygen lance blow head, and reduce manufacturing procedure, the sprayer body shown in the present embodiment adopts the integrally casting molding structure.
Other parts of the present embodiment adopt prior art, do not repeat them here.
Above-described embodiment with the explanation of the present invention of opposing, is not only limitation ot it.
Claims (2)
1. an oxygen lance blow head is prevented the corrode method, it is characterized in that: adopt following steps: 1) oxygen lance blow head with casting is processed into desired size; 2) the shower nozzle end face of described oxygen lance blow head pushed; 3) to the shower nozzle end face of described oxygen lance blow head remove contamination, polished finish; 4) oxygen lance blow head after cleaning carries out preheating, and forms thermofin at the shower nozzle end face spraying alloy lagging material of described oxygen lance blow head; Described alloy lagging material is the alumina-silicate ceramic fibre spray material; The described oxygen lance blow head structure that is formed in one.
2. an oxygen lance blow head, comprise sprayer body (3), it is characterized in that: the sprayer body end face (2) of described sprayer body (3) has the thermofin of alloy lagging material formation through compactly extruding at the surface spraying of described sprayer body end face (2); Described thermofin is alumina-silicate ceramic fibre spray material thermofin; Described sprayer body (3) is integrated the casting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243806 CN102312041B (en) | 2011-08-24 | 2011-08-24 | Anti-corrosion method for oxygen lance nozzle and oxygen lance nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243806 CN102312041B (en) | 2011-08-24 | 2011-08-24 | Anti-corrosion method for oxygen lance nozzle and oxygen lance nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102312041A CN102312041A (en) | 2012-01-11 |
| CN102312041B true CN102312041B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110243806 Expired - Fee Related CN102312041B (en) | 2011-08-24 | 2011-08-24 | Anti-corrosion method for oxygen lance nozzle and oxygen lance nozzle |
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| Country | Link |
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| CN (1) | CN102312041B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CL2014000034A1 (en) * | 2014-01-07 | 2014-10-03 | Trefimet S A | Thermal lance for drilling and / or fusion cutting any material, comprises at least 4 tubular profiles, one outer and three inner, and more than 17 cavities inside the lance, at least 2 of the 4 tubular profiles have different cross sections and the profiles are located contiguously; and use of the spear. |
| CN104841626A (en) * | 2015-02-16 | 2015-08-19 | 上海祥贸实业有限公司 | Repairing method of metal workpiece |
| CN115141906A (en) * | 2021-03-28 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Long-life oxygen lance nozzle for converter smelting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368616Y (en) * | 1999-04-14 | 2000-03-15 | 烟台鲁宝有色合金厂 | Nozzles of oxygen lances |
| CN2409214Y (en) * | 1999-12-10 | 2000-12-06 | 金锞 | Converter oxygen lance with coating |
| CN2535418Y (en) * | 2002-03-25 | 2003-02-12 | 王素芬 | Combined extruding-casting oxygen lanze nozzle |
| CN201432081Y (en) * | 2009-06-22 | 2010-03-31 | 王明杰 | High density oxygen lance nozzle mold |
| CN202214379U (en) * | 2011-08-24 | 2012-05-09 | 济南程信利冶金备件有限公司 | Oxygen lance spray head |
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2011
- 2011-08-24 CN CN 201110243806 patent/CN102312041B/en not_active Expired - Fee Related
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| CN102312041A (en) | 2012-01-11 |
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Granted publication date: 20130605 Termination date: 20190824 |