CN105714023A - Low silicon aluminum killed steel refining device and method - Google Patents
Low silicon aluminum killed steel refining device and method Download PDFInfo
- Publication number
- CN105714023A CN105714023A CN201410715232.5A CN201410715232A CN105714023A CN 105714023 A CN105714023 A CN 105714023A CN 201410715232 A CN201410715232 A CN 201410715232A CN 105714023 A CN105714023 A CN 105714023A
- Authority
- CN
- China
- Prior art keywords
- slag
- steel
- molten steel
- immersion pipe
- low silicon
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a low silicon aluminum killed steel refining device, and a method. The low silicon aluminum killed steel refining device is composed of a lifting hydraulic cylinder, a clamp, a submerged pipe, and a bolt. The method comprises following steps: converter steel making is adopted, final slag binary basicity, blowing end point molten steel Si content, and tapping temperature are controlled, Al is added in tapping process, molten steel a0 is controlled to be 20*10<6> or lower, and slag-stopping slag thickness in tapping process is controlled to be 50 to 100mm; argon station bottom blowing Ar is carried; the lifting hydraulic cylinder is used for reducing the submerged pipe to be 50 to 150mm below a molten steel surface, pre-melted slag is added into the submerged pipe, lime is added outside the submerged pipe, Al particles are added into the submerged pipe, Ar bottom blowing is carried out; after complete reduction of liquid slag, Ar bottom blowing is maintained, and then soft blowing is carried out, and is maintained for 3 to 7min, wherein slight move of slag surface is realized, and exposure of molten steel is avoided; and the submerged pipe is raised, and continuous casting is carried out directly. According to the method, Si content of steel can be controlled to be 0.03% or lower; temperature reducing of molten steel in processing process is reduced; impurities in molten steel can be removed effectively; molten steel cleanliness is improved; and production cost is reduced.
Description
Technical field
The invention belongs to process for making field, be specifically related to a kind of low silicon aluminium killed steel purifier and method of refining thereof.
Background technology
Iron and steel enterprise is in process of production; the steel grade of some low silicon content such as 08Al, SPHC etc.; generally adopt the production technology of external desulfurization of hot metal converter smelting LF refine continuous casting; the maximum problem of this production technology is that in steel, [Si] is difficult to control to; owing to molten steel adopts strong deoxidizer aluminum to carry out reducing, silicon phenomenon occurs back, often cause finished product [Si] to exceed standard.[Si] of some low-silicon steel kinds requires to be not more than 0.03%, and even target is 0.01%.When [Si] in SPHC steel is more than 0.03%, can cause that the yield strength of steel and tensile strength rise, and the adhesiveness of zinc when having a strong impact on cold rolling press formability and be zinc-plated.When converter smelting, silicon is the element easily removed, and during converter tapping, molten steel [Si] is only trace, therefore controls the increase of [Si] mainly after converter tapping, controls to increase silicon and mainly includes two aspects that 1, controls raw material and bring into.Raw material aspect should use low silicon even without Antaciron, uses without silicon deoxidizer during deoxidation of molten steel, and middle coverture and crystallizer protecting residue adopt without silicon materials, and maximized minimizing raw material increases silicon.2, silicon is controlled back.Proposing to be strict with to Converter Skimming, control bale slag-blanking amount, in order to not remain steel when ensureing converter tapping, big cinder inclusion layer thickness is generally 50～100mm；The strict control raw-material silicon content of the slag making such as refining slag and carbide.Slagging process adopts FeO, MnO and the SiO in big quantity of slag dilution slag simultaneously2, it is suppressed that reduction increases silicon；Generally adopt the quick deoxidation of LF to make white slag desulfurization, under the premise ensureing metallurgical target, shorten refining time as far as possible, forbid long-time Repeat-heating molten steel, reduce FeO, MnO and the SiO in slag as far as possible2, control the stirring intensity of refining process bottom blowing Ar and big Ar mixing time, forbid cruelly to blow, when argon bottom-blowing stirring intensity is excessive, owing to accelerating 4 [Al]+3 (SiO2)=2 (Al2O3) the carrying out that react of+3 [Si], make reaction be more easy to and carry out to increasing silicon direction.
Chinese Patent Application No. 201110051874.6 discloses " the carbon aluminium-killed steel smelting process of a kind of low silicon content ", before blast furnace vanadium-bearing hot metal enters steel making working procedure, first pass through vanadium extraction, desiliconization treatment process, steel making working procedure adopts semi-steel making, molten steel is in slag-stopping tapping and deoxidation, alloying process adds low silicon pre-melted type composite refining slag pre-deoxidation, after molten steel enters LF refine station, conventional lower electrode heating is not adopted to make the mode of white slag, but adopt buckle closure insulation, under the reducing atmosphere of Argon stirring, do deoxidizer with aluminium powder make rapidly white slag, then continue at Calcium treatment and soft blow argon, molten steel is inhibited to return the thermodynamics and kinetics condition of silicon under the premise ensureing refining qualities, after molten steel soft blow argon terminates, enter continuous casting working procedure；Vanadium-bearing hot metal vanadium extraction, desiliconization process process in, the half steel [Si]≤0.02% obtained；Tapping process adopts pushing off the slag measure, thickness of slag layer < 50mm, it is prevented that silicon is returned in the refine that a large amount of slag of tapping causes；Tapping time requirement > 5min, it is uniformly added into the 3 low silicon pre-melted type composite refining slags of 6kg/ts with steel stream while tapping, utilize dynamic conditions good in tapping process, in advance molten steel is carried out preliminary refining process, low silicon pre-melted type composite refining slag is initially added into when tapping 1/4, having added when tapping is to 3/4, tapping adds top slag 1kg/ts again in ladle after terminating；Molten steel a is required after tappingO≤ 10ppm；Described molten steel adopts buckle closure insulation in furnaceman LF position, blow stirring, not bottom electrode make the refinery practice of white slag: namely first using moderate strength Ar to stir 3min, described moderate strength refers to: blows Ar strength control and produces strong wriggling but not exposed molten steel face at liquid level；In ladle, add Al powder 1kg/ts simultaneously make rapidly white slag；After white slag is formed, Ar intensity is blown in reduction makes slag liquid level keep wriggling, continuously add Al powder and keep white slag state, molten steel is carried out Calcium treatment after keeping 8 12min by white slag, require [Ca]/[Al] >=0.1%, continuing buckle closure after Calcium treatment and carry out soft blow Ar operation, keep liquid level slightly to wriggle, the soft blow Ar time is maintained at more than 12min.But this process makes low silicon, carbon aluminium-killed steel element silicon composition qualification rate can only achieve 98%, and still some heat [Si] exceeds standard and must carry out changing steel, causes damage, increase production cost；This technological requirement thickness of slag layer, less than 50mm, certainly will cause when converter tapping in order to reduce slag, and molten steel does not go out clean phenomenon completely, reduces STEELMAKING PRODUCTION efficiency；In addition to minimizing molten steel temperature drop, it is necessary to adopt the mode of buckle closure insulation in furnaceman LF position, and this occupies refine station, reduces the production efficiency of LF station.
Chinese Patent Application No. 200610166553.X) disclose " the carbon aluminium-killed steel smelting process of a kind of low silicon content "; it is carry out bessemerizing for raw material with molten iron, converter tapping, the refine of Argon station, finally molten steel sent into the casting of billet caster whole process protection and namely obtain low carbon low silicon aluminium killed steel; wherein; in described converter tapping process; add, in the molten steel after deoxidation alloying processes, the compound slag making materials including pro-molten refining slag and carry out pre-slag making, control slag basicity and reach 6.0～8.0；Described Argon station refine includes carrying out following steps in Argon station: (1) degree of depth deoxidation: the molten steel after converter tapping is carried out deoxidation by the method to feed Al line, controlling when deoxidation terminates period that in molten steel, free oxygen content is between 2～5ppm, [Al] s is between 400～600ppm；(2) slag refining: add fluorite, aluminum shot and carbide carry out residue adjustment operation, carry out strong Bottom Argon Stirring simultaneously, control when slag making terminates (FeO+MnO) in slag less than 2%, (Al2O3) content is between 20～30%；(3) soft blow refine: adopt Stirring by Ar Blowing of the weak end to carry out soft blow operation；(4) Calcium treatment: add silico-calcium core-spun yarn by wire feeder, controls remaining [Ca] in molten steel after Calcium treatment terminatestReach 30～40ppm.But, above-mentioned process does not mention the control level of [Si] in steel, and when Calcium treatment, adds silico-calcium core-spun yarn by wire feeder, from a little, is not very harsh to the requirement of [Si] in steel；In above-mentioned technical process, it is necessary to carry out slag making, soft blow refine and Calcium treatment at Argon station, molten steel can be produced very big temperature drop, it is desirable to during converter tapping, temperature is significantly high, and this is very big to the injury of converter lining.
Summary of the invention
It is contemplated that the weak point existed for prior art, it is provided that molten steel can be reduced rapidly by one after converter tapping, alloying, it is suppressed that molten steel returns silicon, and removes steel inclusion, reduces low silicon aluminium killed steel purifier and the method for molten steel temperature drop.
For this, the solution that the present invention takes is:
A kind of low silicon aluminium killed steel purifier, it is characterised in that be made up of lifting hydraulic cylinder, clamp, immersion pipe and bolt；Lifting hydraulic cylinder cylinder rod is fixedly arranged at the front end with a clamp, and two tong arms of clamp are anterior with circular arc, and circular arc front end is provided with connecting plate, and upper end is bolted in clamp circular arc with the immersion pipe turned edge.
A kind of low silicon aluminium killed steel method of refining, it is characterised in that concrete grammar and step be:
(1) converter smelting molten steel is adopted, converter finishing slag dual alkalinity controls 3～4, blowing end point molten steel [Si]≤0.01%, Tapping Temperature of Bof 1660～1680 DEG C, tapping process adds Al by 0.5～1.5kg/ ton steel and carries out deoxidation, alloying, target call molten steel aO≤20×10-6, tapping process is taked pushing off the slag operate, thickness of slag layer controls at 50～100mm.
(2) converter tapping enters Argon station after terminating, and from air brick of steel ladle bottom blowing Ar, after being blown open by the slag above molten steel, by lifting hydraulic cylinder, the immersion pipe of purifier is placed on ladle slag and blows the surface at place open.
(3) utilizing lifting hydraulic cylinder that the immersion pipe being preheated to 950～1050 DEG C before use is dropped to the degree of depth of 50～150mm under molten steel face, add pre-melted slag, form the melt cinder of good fluidity inside immersion pipe, addition is 0.4～0.8kg/ ton steel；And outside immersion pipe, in slag, add Calx, and make outer steel basicity of slag reach 7.3～8.0, this high alkalinity slag has high-melting-point, poor fluidity, and 4 [Al]+3 (Si0 will not occur in this region2)=3 [Si]+2 (A12O3), thus reaching to reduce refine to return the purpose of silicon, improve [Si] qualification rate of low silicon aluminium killed steel.Then adding Al grain 0.2～0.45kg/ ton steel inside immersion pipe, carry out slag reduction and molten steel alloying, be maintained with bottom blowing Ar, bottom blowing Ar flow is 20～40Nm3/h。
(4) after melt cinder fully reduces, keep bottom blowing Ar5～8min, reduce thereafter argon flow amount to 4～8Nm3/ h carries out soft blow, makes top of the slag fine motion not make molten steel exposed, keeps 3～7min, rises immersion pipe, directly casts to continuous casting working procedure, and middle coverture and crystallizer protecting residue adopt without silicon materials, and the molten steel that minimizing raw material causes increases silicon.
The key component of described pre-melted slag is: CaO:40～45%, Al2O3: 38～42%, SiO2: 5～9%, MgO:4～7%, other is inevitable impurity.
CaO content >=90% in described Calx.
Compared with prior art, advantages of the present invention is as follows:
1. the present invention fully achieves the target of [Si]≤0.03% in steel.
2. the present invention can efficiently reduce molten steel temperature drop in processing procedure, and compared with conventional Argon stirring, temperature loss can reduce by 50%.
3. the present invention can remove the field trash in molten steel effectively, makes field trash fully float and be adsorbed by slag, improves the cleanliness factor of molten steel, and pre-melted slag addition is only the 25% of routine operation, thus cost can be reduced.
4. purifier simple in construction of the present invention, it is easy to operation, invests little, does not affect the normal operating of miscellaneous equipment.
Accompanying drawing explanation
Fig. 1 is that low silicon aluminium killed steel purifier uses view；
Fig. 2 is low silicon aluminium killed steel purifier top view.
In figure: lifting hydraulic cylinder 1, clamp 2, immersion pipe 3, pre-melted slag 4, bolt 5, Calx 6, molten steel 7, ladle 8, air brick 9.
Detailed description of the invention
From accompanying drawing, the low silicon aluminium killed steel purifier of the present invention, it is made up of lifting hydraulic cylinder 1, clamp 2, immersion pipe 3, pre-melted slag 4 and bolt 5.The cylinder rod of lifting hydraulic cylinder 1 is fixedly arranged at the front end with a clamp 2, two tong arms of clamp 2 are anterior with one end circular arc, and circular arc front end is extended with one end connecting plate, and connecting plate is provided with bolt hole, the upper end of cylindrical shape immersion pipe 3 is with turning edge, and immersion pipe 3 is fixed in the circular arc of clamp 2 front portion by bolt 5.
Concretely comprising the following steps of the low silicon aluminium killed steel method of refining of the present invention:
1, converter smelting molten steel is adopted, converter finishing slag dual alkalinity controls 3～4, blowing end point molten steel [Si]≤0.01%, Tapping Temperature of Bof 1660～1680 DEG C, tapping process adds Al by 0.5～1.5kg/ ton steel and carries out deoxidation, alloying, target call molten steel aO≤20×10-6, tapping process is taked pushing off the slag operate, thickness of slag layer controls at 50～100mm.
2, converter tapping enters Argon station after terminating, and from ladle 8 air brick 9 bottom blowing Ar, after being blown open by the slag above molten steel 7, by lifting hydraulic cylinder 1, the immersion pipe 3 of purifier is placed on ladle 8 slag and blows the surface at place open.
3, utilizing lifting hydraulic cylinder 1 that the immersion pipe 3 being preheated to 950～1050 DEG C before use is dropped to the degree of depth of 50～150mm under molten steel face, add pre-melted slag 4, form the melt cinder of good fluidity inside immersion pipe 3, addition is 0.4～0.8kg/ ton steel；And in slag, add Calx 5 in immersion pipe 3 outside, and make outer steel basicity of slag reach 7.3～8.0, this high alkalinity slag has high-melting-point, poor fluidity, and 4 [Al]+3 (Si0 will not occur in this region2)=3 [Si]+2 (A12O3), thus reaching to reduce refine to return the purpose of silicon, improve [Si] qualification rate of low silicon aluminium killed steel.Then adding Al grain 0.2～0.45kg/ ton steel inside immersion pipe 3, carry out slag reduction and molten steel 7 alloying, be maintained with bottom blowing Ar, bottom blowing Ar flow is 20～40Nm3/h。
4, after melt cinder fully reduces, keep bottom blowing Ar5～8min, reduce thereafter argon flow amount to 4～8Nm3/ h carries out soft blow, makes top of the slag fine motion not make molten steel 7 exposed, keeps 3～7min, rises immersion pipe 3, directly casts to continuous casting working procedure, and middle coverture and crystallizer protecting residue adopt without silicon materials, and the molten steel that minimizing raw material causes increases silicon.
Wherein, the key component of described pre-melted slag 4 is: CaO:40～45%, Al2O3: 38～42%, SiO2: 5～9%, MgO:4～7%, other is inevitable impurity.CaO content >=90% in described Calx 6.
Below in conjunction with embodiment, the invention will be further described.
Embodiment adopts 100 tons of converters, immersion pipe 3 preheating temperature before use is 1000 DEG C, smelting steel grade is low silicon aluminium killed steel, carrying out 4 groups altogether, wherein 1 group is comparative example, and comparative example is not adopt this purifier at Argon station, carry out blowing Ar operation, add pre-melted slag 4, metallic aluminium carries out reducing slag, and the slag ingredient on whole molten steel face is uniformity, then goes up machine casting.
The composition of its technological parameter, control result and pre-melted slag is respectively in Table 1 and table 2.
Table 1: embodiment and comparative example technological parameter and control result
Table 2: pre-melted slag becomes to be grouped into
From table 1 it follows that utilize this purifier to carry out blowing refining at Argon station, significantly reducing finished product [Si], content reaches≤0.02%, and finished product oxygen content is also greatly lowered simultaneously, is respectively less than 0.0020%, improves the quality of steel.The temperature drop of molten steel is about the 40% of former technique, and the operation rhythm with smelting molten steel is provided bigger space by this, reduces the temperature loss of molten steel, advantageously reduces production cost.As can be seen from Table 2, the addition of pre-melted slag relatively comparative example is greatly reduced, and reduce further production cost.
Claims (4)
1. one kind low silicon aluminium killed steel purifier, it is characterised in that be made up of lifting hydraulic cylinder, clamp, immersion pipe and bolt；Lifting hydraulic cylinder cylinder rod is fixedly arranged at the front end with a clamp, and two tong arms of clamp are anterior with circular arc, and circular arc front end is provided with connecting plate, and upper end is bolted in clamp circular arc with the immersion pipe turned edge.
2. apply the method for low silicon aluminium killed steel purifier described in claim 1 for one kind, it is characterised in that concrete grammar and step be:
(1) converter smelting molten steel is adopted, converter finishing slag dual alkalinity controls 3～4, blowing end point molten steel [Si]≤0.01%, Tapping Temperature of Bof 1660～1680 DEG C, tapping process adds Al by 0.5～1.5kg/ ton steel and carries out deoxidation, alloying, target call molten steel aO≤20×10-6, tapping process is taked pushing off the slag operate, thickness of slag layer controls at 50～100mm；
(2) converter tapping enters Argon station after terminating, and from air brick of steel ladle bottom blowing Ar, after being blown open by the slag above molten steel, by lifting hydraulic cylinder, the immersion pipe of purifier is placed on ladle slag and blows the surface at place open；
(3) utilizing lifting hydraulic cylinder that the immersion pipe being preheated to 950～1050 DEG C before use is dropped to the degree of depth of 50～150mm under molten steel face, add pre-melted slag inside immersion pipe, addition is 0.4～0.8kg/ ton steel；And outside immersion pipe, in slag, add Calx, make outer steel basicity of slag reach 7.3～8.0；Then adding Al grain 0.2～0.45kg/ ton steel inside immersion pipe, carry out slag reduction and molten steel alloying, be maintained with bottom blowing Ar, bottom blowing Ar flow is 20～40Nm3/ h；
(4) after melt cinder fully reduces, keep bottom blowing Ar5～8min, reduce thereafter argon flow amount to 4～8Nm3/ h carries out soft blow, makes top of the slag fine motion not make molten steel exposed, keeps 3～7min, rises immersion pipe, directly casts to continuous casting working procedure.
3. the method for low silicon aluminium killed steel purifier described in application claim 1 according to claim 2, it is characterised in that the key component of described pre-melted slag is: CaO:40～45%, Al2O3: 38～42%, SiO2: 5～9%, MgO:4～7%, other is inevitable impurity.
4. the method for low silicon aluminium killed steel purifier described in application claim 1 according to claim 2, it is characterised in that CaO content >=90% in described Calx.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715232.5A CN105714023B (en) | 2014-12-01 | 2014-12-01 | A kind of low silicon aluminium killed steel purifier and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715232.5A CN105714023B (en) | 2014-12-01 | 2014-12-01 | A kind of low silicon aluminium killed steel purifier and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105714023A true CN105714023A (en) | 2016-06-29 |
| CN105714023B CN105714023B (en) | 2017-09-08 |
Family
ID=56146028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410715232.5A Active CN105714023B (en) | 2014-12-01 | 2014-12-01 | A kind of low silicon aluminium killed steel purifier and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105714023B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114871392A (en) * | 2022-03-11 | 2022-08-09 | 陕钢集团产业创新研究院有限公司 | Production method for smelting steel of different slag system components in modularized classification manner |
| CN115074486A (en) * | 2022-07-11 | 2022-09-20 | 河北普阳钢铁有限公司 | External refining and slagging method for converter steelmaking |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235449Y (en) * | 1994-04-12 | 1996-09-18 | 鞍山钢铁公司 | Impregnation tube used in steel ladle refining |
| CN201351359Y (en) * | 2009-01-22 | 2009-11-25 | 歌山建设集团有限公司 | Steel pipe fixed fastener-type template support |
| CN101905269A (en) * | 2010-07-23 | 2010-12-08 | 中国重型机械研究院有限公司 | Automatic two-wire lifting and clamping device |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
| CN102982924A (en) * | 2012-10-27 | 2013-03-20 | 江苏神马电力股份有限公司 | Large-diameter tube assembling and lifting tool |
| CN203212161U (en) * | 2013-04-28 | 2013-09-25 | 张家港市荣华金属制品有限公司 | Connecting member for building elevator |
| CN103509913A (en) * | 2013-09-03 | 2014-01-15 | 西安前沿重型工业工程技术有限公司 | Argon-blowing oxygen-blowing molten steel refining apparatus with vacuum cap |
| CN203904392U (en) * | 2014-05-22 | 2014-10-29 | 唐山钢铁国际工程技术有限公司 | Impregnation cover capable of being inserted into argon blowing top lance and oxygen lance simultaneously |
-
2014
- 2014-12-01 CN CN201410715232.5A patent/CN105714023B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235449Y (en) * | 1994-04-12 | 1996-09-18 | 鞍山钢铁公司 | Impregnation tube used in steel ladle refining |
| CN201351359Y (en) * | 2009-01-22 | 2009-11-25 | 歌山建设集团有限公司 | Steel pipe fixed fastener-type template support |
| CN101905269A (en) * | 2010-07-23 | 2010-12-08 | 中国重型机械研究院有限公司 | Automatic two-wire lifting and clamping device |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
| CN102982924A (en) * | 2012-10-27 | 2013-03-20 | 江苏神马电力股份有限公司 | Large-diameter tube assembling and lifting tool |
| CN203212161U (en) * | 2013-04-28 | 2013-09-25 | 张家港市荣华金属制品有限公司 | Connecting member for building elevator |
| CN103509913A (en) * | 2013-09-03 | 2014-01-15 | 西安前沿重型工业工程技术有限公司 | Argon-blowing oxygen-blowing molten steel refining apparatus with vacuum cap |
| CN203904392U (en) * | 2014-05-22 | 2014-10-29 | 唐山钢铁国际工程技术有限公司 | Impregnation cover capable of being inserted into argon blowing top lance and oxygen lance simultaneously |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114871392A (en) * | 2022-03-11 | 2022-08-09 | 陕钢集团产业创新研究院有限公司 | Production method for smelting steel of different slag system components in modularized classification manner |
| CN114871392B (en) * | 2022-03-11 | 2023-08-29 | 陕钢集团产业创新研究院有限公司 | Production method of steel of different slag system components in modularized classification smelting variety |
| CN115074486A (en) * | 2022-07-11 | 2022-09-20 | 河北普阳钢铁有限公司 | External refining and slagging method for converter steelmaking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105714023B (en) | 2017-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106148844B (en) | A kind of preparation method of sulfur-bearing ultralow titanium high standard bearing steel | |
| CN101550475B (en) | Method for producing ultra-low-carbon steel | |
| CN105177215B (en) | Efficient production process of high aluminum-alloy-content structure round steel | |
| CN100465291C (en) | Production tech. of low carbon low silicon aluminium killed steel | |
| CN102758144B (en) | Production method for steel ingot of large-sized high-nitrogen retaining ring steel | |
| CN113088800B (en) | Method for recycling refining slag and molten steel casting residue of low-carbon aluminum killed steel LF furnace | |
| CN105907919B (en) | A kind of smelting process for spring steel Control and Inclusion Removal | |
| CN104611502B (en) | A kind of sulfur-bearing Series Gear steel smelting technique in aluminum | |
| CN108330245A (en) | A kind of high-purity smelting process of stainless steel | |
| CN103834848B (en) | A kind of boracic compressor wire and steel strand steel and smelting technology thereof | |
| CN104862443A (en) | Smelting method for low-carbon low-silicon wire-welding steel | |
| CN111910045B (en) | Smelting method of high-purity austenitic stainless steel | |
| CN102747269A (en) | Low-silicon aluminum-containing steel and production method thereof | |
| CN108588326B (en) | Method for smelting high-strength welding wire steel ER80-G by vanadium-containing molten iron | |
| CN105177427A (en) | Steel for 30CrMo gas cylinders and production method thereof | |
| CN108893682B (en) | Die steel billet and preparation method thereof | |
| CN105483501A (en) | Method for smelting phosphorus-containing ultra-low carbon steel | |
| CN109055649A (en) | A kind of high manganese high-silicon high ferrophosphorus water of converter smelting proposes the preparation method of carbon guarantor's manganese | |
| CN105154623A (en) | Efficient alloying method for smelting 38CrMoAl steel | |
| CN108330240A (en) | Method of the aluminium without calcification processing drops in continuous casting Q235 steel grades | |
| CN106521329A (en) | Production method for non-quenched and tempered free-cutting steel | |
| CN105714023B (en) | A kind of low silicon aluminium killed steel purifier and method | |
| CN108467918A (en) | A kind of method that electric furnace Molten Steel over-oxidation smelts 16Mn steel | |
| CN111705269A (en) | Low-silicon steel 27NiCrMoV15-6 and smelting continuous casting production process thereof | |
| WO2020228240A1 (en) | Method for smelting high-quality steel using zinc-containing scrap steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |