CN104060029A - Design method for optimizing converter oxygen lance and method for optimizing converter smelting - Google Patents
Design method for optimizing converter oxygen lance and method for optimizing converter smelting Download PDFInfo
- Publication number
- CN104060029A CN104060029A CN201410348805.5A CN201410348805A CN104060029A CN 104060029 A CN104060029 A CN 104060029A CN 201410348805 A CN201410348805 A CN 201410348805A CN 104060029 A CN104060029 A CN 104060029A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- converter
- oxygen lance
- optimizing
- angle
- 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
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a design method for optimizing a converter oxygen lance and a method for optimizing converter smelting. The design method comprises the steps of selecting the number of nozzle holes of an oxygen lance nozzle according to the tonnage of the converter, and calculating the included angle of the oxygen lancer according to a formula shown in the specification, wherein theta represents one half of an included angle between the axes of two adjacent nozzle holes of the oxygen lancer nozzle, phi represents the included angle of the oxygen lance, namely an included angle between the axis of any nozzle hole of the oxygen lancer nozzle and the center line of the oxygen lance, and N represents the number of the nozzle holes of the oxygen lance nozzle. According to the design method for optimizing the converter oxygen lance and the method for optimizing converter smelting, the steel attached to the oxygen lancer in the converter smelting process can be reduced.
Description
Technical field
The disclosure relates to a kind of method of optimizing the method for design of converter oxygen gun and optimizing converter smelting.
Background technology
Converter is most widely used a kind of equipment for making steel in metallurgy industry, wherein oxygen rifle technology is the core of converter steeling technology, the design level of oxygen lance blow head and using method are directly connected to the carrying out of the high efficiency smooth of converter steelmaking, and on operating rate, molten iron recovery rate, the quality of converter steel and the work-ing life of oxygen lance blow head etc. all producing direct impact.
In the process of the converter smelting of prior art, because the design and use of oxygen rifle are unreasonable, cause molten iron and slag in the process of bessemerizing to be bonded on the oxygen rifle body of a gun and shower nozzle, or slag and molten iron ejection converter mouth, directly bring disadvantageous effect to indexs such as the work-ing life of oxygen lance blow head, production cost and operating rates.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned technology, a kind of method of design of converter oxygen gun and method of optimizing converter smelting optimized is provided.
According to an aspect of the present invention, provide a kind of method of design of optimizing converter oxygen gun, this method of design comprises: the number of selecting the spray orifice on oxygen lance blow head according to converter tonnage; According to formula
calculate oxygen rifle angle, wherein, θ is half of axis angle of adjacent two spray orifices on oxygen lance blow head,
for oxygen rifle angle, oxygen rifle angle is the axis of the arbitrary spray orifice on oxygen lance blow head and the angle between oxygen rifle medullary ray, and N is the number of the spray orifice on oxygen lance blow head.
According to exemplary embodiment of the present invention, θ can be 8.5 °～9.5 °.
According to a further aspect in the invention, provide a kind of method of optimizing converter smelting, described method comprises with notch cuttype curve manipulation designed oxygen rifle as stated above.
According to exemplary embodiment of the present invention, described notch cuttype curve can comprise ladder ascent stage and the ladder downcomer of carrying out successively.
According to the method for design of optimization converter oxygen gun of the present invention, can significantly reduce steel adhesion on oxygen lance, improve the generation of the phenomenon of life-span of oxygen lance and the splash of reduction slag.In addition, according to the method for optimization converter smelting of the present invention, further Optimization of LD Smelting Technology and reduce oxygen rifle scaling loss.
Accompanying drawing explanation
Fig. 1 is the part sectioned view illustrating according to the oxygen lance blow head of exemplary embodiment of the present invention.
Fig. 2 is the upward view illustrating according to the oxygen lance blow head of exemplary embodiment of the present invention.
Fig. 3 is the notch cuttype curve synoptic diagram illustrating according to the oxygen rifle operation of exemplary embodiment of the present invention.
Description of reference numerals
1 oxygen lance blow head
2 spray orifices
Embodiment
The present invention, mainly for the problem of steel adhesion on oxygen lance in the process of bessemerizing and/or slag splash, provides a kind of method of optimizing the method for converter oxygen gun and optimizing converter smelting.
According to metallurgy principle, increase the degree of scatter of oxygen supply by lance and/or increase the oxygen rifle angle (angle between the spray orifice axis on oxygen rifle medullary ray and oxygen lance blow head
) can optimize the smelting of converter, so improve the hole count of oxygen lance blow head and increase oxygen rifle angle
can improve the degree of scatter of oxygen supply.But need the oxygen jet of considering oxygen rifle on the penetration depth in molten bath and the stirring impact on molten bath in Smelting Practice, and the complexity that need to consider the manufacture of porous nozzle.Therefore, the invention provides a kind of method of design of oxygen rifle, according to described method of design, can be fast, reasonable design goes out the needed oxygen rifle of converter smelting of different nominal tonnages.
Fig. 1 is the part sectioned view illustrating according to the oxygen lance blow head of exemplary embodiment of the present invention.Fig. 2 is the upward view illustrating according to the oxygen lance blow head of exemplary embodiment of the present invention.Below in conjunction with Fig. 1 and Fig. 2, specifically describe the method for design of optimization converter oxygen gun of the present invention.
According to the method for design of optimization converter oxygen gun of the present invention, first, according to the nominal tonnage of converter, select the number of the spray orifice 2 on suitable oxygen lance blow head 1.According to exemplary embodiment of the present invention, when converter nominal tonnage is not more than 60t, the number of the spray orifice 2 on can oxygen lance blow head 1 is set to 3 holes, hole～4, when converter nominal tonnage is greater than 60t, the number of the spray orifice on can oxygen lance blow head is set to 4 holes, hole～6, can guarantee that like this oxygen rifle is to the penetration depth in molten bath and stirring dynamics, can also improve the degree of scatter of oxygen supply by lance simultaneously.
Then, according to formula
calculate oxygen rifle angle, wherein, θ is effective angle, i.e. half of the axis angle of adjacent two spray orifices 2 on oxygen lance blow head 1,
for oxygen rifle angle, oxygen rifle angle is the axis of the arbitrary spray orifice 2 on oxygen lance blow head 1 and the angle of oxygen rifle medullary ray, and N is the number of the spray orifice 2 on oxygen lance blow head 1.Preferably, the axis angle of two spray orifices 2 of arbitrary neighborhood on oxygen lance blow head 1 is identical, and the oxygen rifle angle of each spray orifice 2
identical.The number of the spray orifice 2 on oxygen lance blow head 1 and oxygen rifle angle
between quantitative relation be of paramount importance quantitative relationship.If oxygen rifle angle
excessive, the oxygen jet of oxygen lance blow head 1 is excessive to the impact area in molten bath, and the easy peroxidation of slag easily causes splash, accelerates the erosion of converter lining and increase iron loss; If oxygen rifle angle
too small, easily reduce the FeO content in slag, thereby cause slag thickness to return the dry and sticky rifle of molten steel splash.In addition, slag getting dry has also reduced the active degree of slag, thereby has weakened the dephosphorization of slag and the ability of desulfurization.According to the method for design of optimization converter oxygen gun of the present invention, oxygen rifle when effective angle θ is 8.5 °～9.5 ° has good metallurgical effect.When the effective angle of oxygen rifle is less than 8.5 °, slag is thickness comparatively, easily loses the ability of removing inclusion, and is easy to sticky rifle; When the effective angle of oxygen rifle is greater than 9.5 °, slag is crossed rare and peroxidation, easily water eroding and flooding furnace wall.
On the basis of the method for design of optimization converter oxygen gun according to the present invention, by the oxygen rifle operating curve of selecting in converter steelmaking process, can also further optimize and smelt and reduce oxygen rifle scaling loss.
Fig. 3 is the notch cuttype curve synoptic diagram illustrating according to the oxygen rifle operation of exemplary embodiment of the present invention.Below in conjunction with Fig. 3, specifically describe according to the method for optimization converter smelting of the present invention.
According to the method for the optimization converter smelting of exemplary embodiment of the present invention, comprise the designed oxygen rifle of notch cuttype curve manipulation method of design according to the present invention with as shown in Figure 3.
According to exemplary embodiment of the present invention, described notch cuttype curve comprises ladder ascent stage and ladder downcomer.In the process of converter smelting, in molten bath, need Fast terrain to become take lime as main active slag.Because the fusing assistant that FeO is lime fusing holds again the flux of lime, so for slagging as early as possible, need under impacting, oxygen flow form in time the FeO with some amount at bath surface, and molten bath also must have strong whipping force, with raisingization slag speed, and described whipping force is mainly derived from the floating of the CO that the reaction between carbon and oxygen in molten bath produces and stirs, reaction between carbon and oxygen will consume the FeO in molten bath, therefore must handle the relation between reaction between carbon and oxygen speed and slagging well.According to the method for optimization converter smelting of the present invention, first, before ladder ascent stage converter smelting, for the ease of to the stirring of converter molten pool and Fast Slag Melting, adopt low rifle position to bath lancing, oxygen blow duration can be determined according to different smelting technologyes.Then, after slag fusing, rising oxygen rifle is to the maximum height of the converter oxygen gun requirement of processing requirement, to promote the formation of the FeO in slag.Again, prolongation along with tap to tap time, can there is certain hour compartment of terrain and reduce oxygen lance position, to guarantee FeO in molten bath and the balance between C, avoid the FeO content in molten bath too much to cause splash, increase FeO to the erosion of converter lining and increase iron loss.When oxygen rifle angle is too small, easily reduces the FeO content in slag, thereby cause slag thickness to return the dry and sticky rifle of molten steel splash.In addition, slag getting dry has also reduced the active degree of slag, thereby has weakened the dephosphorization of slag and the ability of desulfurization.
According to the method for design of optimization converter oxygen gun of the present invention, can significantly reduce steel adhesion on oxygen lance, improve the generation of life-span of oxygen lance and the splash of reduction slag.In addition compare with the oxygen rifle run curve of height-low rifle position of the low rifle carbon drop of high rifle slag of prior art according to the method for optimization converter smelting of the present invention more further Optimization of LD Smelting Technology and reduce oxygen rifle scaling loss.
Claims (4)
1. a method of design of optimizing converter oxygen gun, is characterized in that, described method of design comprises:
According to converter tonnage, select the number of the spray orifice on oxygen lance blow head;
According to formula
calculate oxygen rifle angle, wherein, θ is half of axis angle of adjacent two spray orifices on oxygen lance blow head,
for oxygen rifle angle, oxygen rifle angle is the axis of the arbitrary spray orifice on oxygen lance blow head and the angle between oxygen rifle medullary ray, and N is the number of the spray orifice on oxygen lance blow head.
2. the method for claim 1, is characterized in that, θ is 8.5 °～9.5 °.
3. a method of optimizing converter smelting, is characterized in that, described method comprises with notch cuttype curve manipulation oxygen rifle as designed in claim 1.
4. method as claimed in claim 3, is characterized in that, described notch cuttype curve comprises ladder ascent stage and the ladder downcomer of carrying out successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348805.5A CN104060029A (en) | 2014-07-22 | 2014-07-22 | Design method for optimizing converter oxygen lance and method for optimizing converter smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348805.5A CN104060029A (en) | 2014-07-22 | 2014-07-22 | Design method for optimizing converter oxygen lance and method for optimizing converter smelting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104060029A true CN104060029A (en) | 2014-09-24 |
Family
ID=51547958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348805.5A Pending CN104060029A (en) | 2014-07-22 | 2014-07-22 | Design method for optimizing converter oxygen lance and method for optimizing converter smelting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104060029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593160A (en) * | 2020-05-25 | 2020-08-28 | 河钢乐亭钢铁有限公司 | Converter oxygen jet flow dynamic adjustment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041344A (en) * | 2010-12-31 | 2011-05-04 | 本钢板材股份有限公司 | Method for smelting bearing steel |
-
2014
- 2014-07-22 CN CN201410348805.5A patent/CN104060029A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041344A (en) * | 2010-12-31 | 2011-05-04 | 本钢板材股份有限公司 | Method for smelting bearing steel |
Non-Patent Citations (1)
| Title |
|---|
| 刘荣蒂: "半钢强化冶炼与氧枪设计", 《四川冶金》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593160A (en) * | 2020-05-25 | 2020-08-28 | 河钢乐亭钢铁有限公司 | Converter oxygen jet flow dynamic adjustment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102766723B (en) | Limestone slagging steelmaking lance position control method for basic oxygen furnaces | |
| CN104561452B (en) | Dust the device and method of single mouth vacuum deaeration refining molten steel at a kind of end | |
| CN101294233A (en) | Desilication demanganization method at same time of preprocessing hot metal | |
| CN105063371A (en) | Method for reducing copper slags in top-blowing converting furnace | |
| CN112266999A (en) | Energy-saving and efficient vanadium extraction process | |
| CN104060029A (en) | Design method for optimizing converter oxygen lance and method for optimizing converter smelting | |
| JP4830825B2 (en) | Refining method in converter type refining furnace | |
| EP2889385B1 (en) | Straight barrel type vacuum refining device and method for use the same | |
| JPH10176212A (en) | Method for preventing flow-out of slag at the time of discharging molten steel | |
| JP6358454B2 (en) | Operation method of top-bottom blowing converter | |
| CN112853028A (en) | Device and method for stabilizing end point carbon content of converter | |
| JP5265243B2 (en) | Blowing method of ultra-low carbon steel using general soot | |
| JP2010031338A (en) | Method for operating converter | |
| JP2011084789A (en) | Converter blowing method | |
| JP5822073B2 (en) | Converter refining method with excellent dust generation suppression effect | |
| JP2017057468A (en) | Top blown lance of converter and operation method of converter | |
| JP6939828B2 (en) | Acid feeding refining method for molten iron | |
| JP6658365B2 (en) | Hot metal refining method | |
| CN104975131B (en) | The method that the quantity of slag is controlled under converter smelting half steel | |
| JP2002030323A (en) | Method for preventing skull from sticking on lance for converter blowing | |
| CN215930528U (en) | Converting equipment and continuous copper smelting equipment | |
| JP6578939B2 (en) | Top blowing lance for converter blowing and converter blowing method | |
| CN215250984U (en) | Converter bottom blowing spray gun alarm device | |
| JP5412756B2 (en) | Converter operation method | |
| CN104946848B (en) | Converter slag blocking plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140924 |
|
| RJ01 | Rejection of invention patent application after publication |