CN102732685A - Method for adding rare earth into RH refining furnace - Google Patents
Method for adding rare earth into RH refining furnace Download PDFInfo
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- CN102732685A CN102732685A CN2012102258413A CN201210225841A CN102732685A CN 102732685 A CN102732685 A CN 102732685A CN 2012102258413 A CN2012102258413 A CN 2012102258413A CN 201210225841 A CN201210225841 A CN 201210225841A CN 102732685 A CN102732685 A CN 102732685A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 99
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007670 refining Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 79
- 239000010959 steel Substances 0.000 claims abstract description 79
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 16
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 23
- NNLJGFCRHBKPPJ-UHFFFAOYSA-N iron lanthanum Chemical compound [Fe].[La] NNLJGFCRHBKPPJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 229910052746 lanthanum Inorganic materials 0.000 abstract description 11
- 238000009749 continuous casting Methods 0.000 abstract description 9
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 abstract 3
- 229910000742 Microalloyed steel Inorganic materials 0.000 abstract 1
- 238000009489 vacuum treatment Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052747 lanthanoid Inorganic materials 0.000 description 2
- 150000002602 lanthanoids Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- SOAUVITUAZMTDM-UHFFFAOYSA-N O=[La]=S Chemical compound O=[La]=S SOAUVITUAZMTDM-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001515806 Stictis Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RKLPWYXSIBFAJB-UHFFFAOYSA-N [Nd].[Pr] Chemical compound [Nd].[Pr] RKLPWYXSIBFAJB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- -1 compound rare-earth Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011165 process development Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a method for adding rare earth into RH refining furnace. The method is characterized in that rare earth lanthanum ferroalloy is added into a RH refining station vacuum feeding bin; molten steel, which satisfies the condition that total oxygen content T.O is less than or equal to 0.002 wt%, active oxygen content a [O] is less than or equal to 0.0005 wt% and [S] content is less than or equal to 0.005 wt% in steel, undergoes vacuum treatment at the RH refining station for 10 min or more than 10 min; and according to the calculated addition of rare earth, rare earth lanthanum ferroalloy is added into a vacuum chamber from the vacuum feeding bin, wherein the addition of the rare earth is controlled within the range of 0.005-0.015 wt%. The invention has the following advantages: by the adoption of the method, the yielding rate of rare earth is high and stable; continuous casting production is smooth; rare earth in steel is uniformly distributed; by the adoption of the rare earth lanthanum ferroalloy, performance of steel is substantially improved; the method requires low cost and is simple to operate; metallurgical effects of rare earth microalloyed steel are obvious; and the method has an extensive popularization and application prospect.
Description
Technical field
The present invention relates to the adding method of a kind of rare earth in steel, be specifically related to a kind of method that in the RH refining furnace, adds rare earth, belong to the ferrous metallurgy field.
Background technology
China is the rare earth big country of world's rare earth resources and output first, also is the big steel country of output of steel first, but the rolling shapes quality also has sizable gap with external advanced level, still has a considerable amount of steel to need import.From the sixties in last century so far, the rare earth steel of China is researched and produced has the history in 50 years, present domestic rare earth steel receives continuous casting process development and adds the puzzlement of technology, the kind and the output of rare earth steel are restricted.
In recent years, in order to satisfy the demand of Nd-Fe-B rare earth permanent magnetic material fast development, enlarged industrial scale to rare earth metal neodymium.In a large amount of separation praseodymium neodymium elements, also separate other light rare earthss such as La, Ce, because market demand is limited, drug on the market to have caused this series products.For this reason, solve La, Ce Application Areas, it also is the rare-earth trade urgent problem that balance is used rare earth resources.Since 2011, after rare earth became the national strategy reserved resources, country strengthened and integrates the rare earth resources dynamics, and the rare earth price rises sharply, and cost pressure increases, and rare earth is used pressure and the challenge that faces under the new situation in steel.
Along with the raising of metallurgical technology level, the content of the content of impurity element, particularly sulphur, oxygen constantly descends in the steel, and the form of inclusion has obtained effective control.The minimizing of impurity element has been also for the performance of RE alloyed effect provides condition in the steel, and rare earth is as the effect of alloy element also more and more significant.Therefore, the effect of research single rare earth in Clean Steel adapts to the development trend of Iron And Steel Industry for the reasonable utilization of rare earth resources, promotes the application of rare earth in metallic substance to have great significance.
Rare earth mainly has cleaning molten steel in steel, compound rare-earth is mingled with, and is mingled with sex change, the microalloying effect.Producing in the standard of rare earth steel at present, mainly is the requirement add-on, and steel middle-weight rare earths content is not required; Stricti jurise is said, is that rare earth is handled steel, and steel middle-weight rare earths massfraction is very low; Almost do not have the solid solution rare earth in the steel, influenced by steel quality, do not give full play to the rare earth metallurgy effect.
Though nearly one period rare earth steel output downslide has appearred, can not show that this work loses value.The research enthusiasm of present international rare earth steel is surging, and related patent U.S. Patent No. emerges in an endless stream.China is big steel country, is moving towards iron and steel power, and the iron and steel in world development from now on must be seen China.This trend has proposed the innovation requirement to iron and steel enterprise.Innovation just has new variety, innovation just has new markets.Rare earth steel should be one of innovation target, exactly because a lot of problem does not solve, the rare earth steel research of China is just had living space, is hopeful.
Up to the present, also do not have suitable rare earth adding method, can satisfy the requirement that rare earth steel is produced, this problem is perplexing the metallargist always.
The steel middle-weight rare earths adds the comparison of technology:
Continuous cast mold is fed the mishmetal silk, higher content of rare earth is arranged in steel, but segregation is serious on the strand transverse section, and the covering slag performance is had considerable influence, and inclusion is assembled the back and is difficult for come-up, needs interpolation equipment and operator, and the production operation difficulty is big.
It is better that tundish is fed bag core mishmetal silk method, rare earth yield height, but instability and fluctuation are bigger, need interpolation equipment and operator, have the nozzle clogging problem.
The LF refining is forward and backward, feeds the mishmetal cored-wire in the forward and backward ladle of VD vacuum, and steel middle-weight rare earths yield is extremely low, and rare earth exists in the steel with the inclusion form basically, and metallurgical effect is not good.
Summary of the invention
It is higher and stable to the purpose of this invention is to provide a kind of rare earth yield, continuous casting production direct motion, the method that in the RH refining furnace, adds rare earth that the steel middle-weight rare earths is evenly distributed.
Concrete grammar of the present invention is following:
In steel-making, adopt the Clean Steel production technology, comprise desulfurizing iron, converter terminal control; Carry out deoxidation with aluminium, the refining high-efficiency desulfurization makes in the steel by mass percent total oxygen content T.O≤0.002%; Activity oxygen level a [O]≤0.0005%, [S] content≤0.005%;
The Rare Earth Lanthanum iron alloy is put into RH refining station vacuum charging storehouse;
The molten steel that will possess above condition proceeds in the vacuum-treat of RH refining station molten steel >=during 10min, by calculating good rare earth adding quantity, from the vacuum charging storehouse Rare Earth Lanthanum iron alloy is added in the Vakuumkammer.Its subsequent handling is: molten steel soft blow argon gas after vacuum-treat 2min finishes stirs 10min, and handling to continuous casting is poured into a mould, and casting process requires whole process to protect cast (seal protection prevents secondary oxidation);
Said rare earth adding quantity be controlled in 0.005～0.015wt% scope (technology is all by the add-on of 0.02wt% in the past, be in the past technology 25～50%);
The result shows through experimental study, to the ability of improving steel performance from big to small order be followed successively by lanthanoid metal, mishmetal and metallic cerium;
Along with the Rare Earth Separation development of technology, utilize REE to be solid-solubilized in easily in the alloy and the characteristic that can reduce active rare-earth, slowed down reaction speed should have higher rare earth yield with the adding technology of lanthanoid metal iron alloy mode, better brings into play rare earth and uses.So rare earth material adopts the Rare Earth Lanthanum iron alloy, alloying constituent is selected La5～40wt% for use, Fe60～95wt%, and granularity 20～30mm packs.
In view of the raising of molten steel cleanliness factor,,, draw suitable rare earth adding quantity in 0.005～0.015wt% scope in conjunction with test-results in the past through the calculating of lanthanum oxygen sulphur thermodynamic equilibrium constant.
At RH vacuum refinement station, vacuum condition is reaction down, has thermodynamics and kinetics condition preferably, and rare earth can reduce the amount that generates re inclusion in the molten steel of cleaning, improve the rare earth yield, improves the rare earth solid solution capacity.
Active rare-earth is very strong, and very easily oxidation is so must protection in casting process.
Advantage of the present invention is: present method is based under the Clean Steel basic condition and realizes, adopts present method rare earth yield higher and stable, continuous casting production direct motion; The steel middle-weight rare earths is evenly distributed; Characteristics such as the Rare Earth Lanthanum iron alloy that adopts significantly improves the performance of steel, and cost is low, and is easy and simple to handle; The metallurgy action of microalloying of rare earth steel is obvious, has popularizing application prospect widely.
Description of drawings:
Fig. 1 is a rare earth adition process synoptic diagram.
Among the figure 1, the vacuum charging storehouse, 2, Vakuumkammer, 3, ladle.
Embodiment:
The preparation of rare earth material:
Rare earth material adopts smelting process production Rare Earth Lanthanum iron alloy at vacuum induction furnace, and composition is selected La5～40wt% for use, Fe60～95wt%, and granularity 20～30mm packs.
The rare earth adding quantity design:
In the add-on of RH refining furnace middle-weight rare earths, by the design of 0.005%～0.015% scope, occurrence is confirmed according to the specific requirement of steel product kind of producing and rare earth adding.
Rare earth adds the molten steel condition:
The alloy addition that A. will calculate by the content of rare earth conversion of Rare Earth Lanthanum iron alloy is added in the vacuum charging storehouse in advance;
B. adopt the Clean Steel production technology in steel-making, comprise desulfurizing iron, converter terminal control; Carry out deoxidation with aluminium, LF refining high-efficiency desulfurization, entire oxygen content in the steel content T.O≤0.002%; Activity oxygen level a [O]≤0.0005%, [S] content≤0.005% (mass percent).
The rare earth adding technology operation:
Proceed in the RH vacuum-treat >=during 10min,, add in the vacuum tank from the vacuum charging storehouse with the Rare Earth Lanthanum iron alloy by calculating good add-on; Molten steel is after vacuum-treat 2min finishes; The soft blow argon gas stirs 10min, and handling to continuous casting is poured into a mould, and casting process requires whole process to protect cast.
Embodiment 1
Press rare earth adding quantity 0.01wt%, lanthanum content 20wt% Rare Earth Lanthanum iron alloy, 210 tons of molten steel calculate, and need to add lanthanum iron alloy 105 kg.Ready lanthanum iron alloy is added in the vacuum charging storehouse in advance;
Adopt 210 tons of converter Clean Steel production technologies in steel-making, the production steel grade is Q345E, comprises desulfurizing iron; Converter terminal control is carried out deoxidation with aluminium, LF refining high-efficiency desulfurization; Carry out thermometric and decide oxygen; Entire oxygen content in the steel T.O=0.0018%, activity oxygen a [O]=0.0002%, [S]=0.003% (mass percent);
When the RH vacuum-treat proceeds to 17min, add in the Vakuumkammer from the vacuum charging storehouse with the Rare Earth Lanthanum iron alloy, molten steel is after vacuum-treat 2min finishes; The soft blow argon gas stirs 10min; Handling to continuous casting is poured into a mould, and casting process whole process is protected cast, and casting process is smooth.
Through detecting: lanthanum content is 0.005wt% in the steel, and the solid solution rare earth content is 0.002wt%, rare earth utilization ratio 50%, and steel grade is evenly distributed, and laterally the ground temperature impact value improves 18%, and metallurgical effect is obvious.
Embodiment 2
Press rare earth adding quantity 0.012wt%, lanthanum content 25wt% Rare Earth Lanthanum iron alloy, 210 tons of molten steel calculate, and need to add 100 kilograms in lanthanum iron alloy.Ready lanthanum iron alloy is added in the vacuum charging storehouse in advance;
Adopt 210 tons of converter Clean Steel production technologies in steel-making, the production steel grade is Q345E, comprises desulfurizing iron; Converter terminal control is carried out deoxidation with aluminium, LF refining high-efficiency desulfurization; Carry out thermometric and decide oxygen; Entire oxygen content in the steel T.O=0.0016%, activity oxygen a [O]=0.0002%, [S]=0.002% (mass percent);
When the RH vacuum-treat proceeds to 17min, add in the Vakuumkammer from the vacuum charging storehouse with the Rare Earth Lanthanum iron alloy, molten steel is after vacuum-treat 2min finishes; The soft blow argon gas stirs 10min; Handling to continuous casting is poured into a mould, and casting process whole process is protected cast, and casting process is smooth.
Through detecting: lanthanum content is 0.008wt% in the steel, and the solid solution rare earth content is 0.003wt%, rare earth utilization ratio 66%, and steel grade is evenly distributed, and laterally the ground temperature impact value improves 14%, and metallurgical effect is obvious.
Embodiment 3
Press rare earth adding quantity 0.008wt%, lanthanum content 20wt% Rare Earth Lanthanum iron alloy, 210 tons of molten steel calculate, and need to add 84 kilograms in lanthanum iron alloy.Ready lanthanum iron alloy is added in the vacuum charging storehouse in advance;
Adopt 210 tons of converter Clean Steel production technologies in steel-making, the production steel grade is Q345E, comprises desulfurizing iron; Converter terminal control is carried out deoxidation with aluminium, LF refining high-efficiency desulfurization; Carry out thermometric and decide oxygen; Entire oxygen content in the steel T.O=0.0018%, activity oxygen a [O]=0.0002%, [S]=0.003% (mass percent);
When the RH vacuum-treat proceeds to 17min, add in the Vakuumkammer from the vacuum charging storehouse with the Rare Earth Lanthanum iron alloy, molten steel is after vacuum-treat 2min finishes; The soft blow argon gas stirs 10min; Handling to continuous casting is poured into a mould, and casting process whole process is protected cast, and casting process is smooth.
Through detecting: lanthanum content is 0.004wt% in the steel, and the solid solution rare earth content is 0.001wt%, rare earth utilization ratio 50%, and steel grade is evenly distributed, and laterally the ground temperature impact value improves 12%, and metallurgical effect is obvious.
Claims (2)
1. a method that in the RH refining furnace, adds rare earth is characterized in that: the Rare Earth Lanthanum iron alloy is put into RH refining station vacuum charging storehouse; To possess in the steel by mass percent total oxygen content T.O≤0.002%; Activity oxygen level a [O]≤0.0005%; The molten steel of [S] content≤0.005% condition, proceed in the vacuum-treat of RH refining station molten steel>=during 10min, by calculating good rare earth adding quantity; From the vacuum charging storehouse Rare Earth Lanthanum iron alloy is added in the Vakuumkammer, rare earth adding quantity is controlled in 0.005～0.015wt% scope.
2. the method that in the RH refining furnace, adds rare earth according to claim 1, it is characterized in that: the composition of Rare Earth Lanthanum iron alloy is La5～40wt%, Fe60～95wt%, granularity 20～30mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160651A (en) * | 2013-03-04 | 2013-06-19 | 内蒙古包钢钢联股份有限公司 | Rare-earth adding method of vacuum induction furnace smelting experimental steel |
| CN103205532A (en) * | 2013-04-11 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Method for adding rare earth to steel |
| CN103627847A (en) * | 2013-11-25 | 2014-03-12 | 内蒙古包钢钢联股份有限公司 | Lanthanum-cerium mixed rare earth ferroalloy for rare earth steel production |
| CN106609313A (en) * | 2017-01-24 | 2017-05-03 | 中国科学院金属研究所 | High-purity rare earth steel treatment method |
| CN110172543A (en) * | 2019-05-23 | 2019-08-27 | 包头钢铁（集团）有限责任公司 | A kind of method that Rare Earth Treated Steel prevents wadding steel in casting process |
| CN110438389A (en) * | 2019-09-16 | 2019-11-12 | 内蒙古工业大学 | A kind of high-purity rare earth steel production method |
| CN110512051A (en) * | 2019-09-05 | 2019-11-29 | 首钢集团有限公司 | A rare earth alloying method to avoid nodules in continuous casting |
| CN112226578A (en) * | 2020-09-15 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Rare earth addition control method for high-strength rare earth girder steel |
| CN114671668A (en) * | 2022-03-11 | 2022-06-28 | 钢铁研究总院有限公司 | Steel ladle refractory material for smelting rare earth steel and manufacturing method thereof |
| CN115522136A (en) * | 2022-09-20 | 2022-12-27 | 包头钢铁（集团）有限责任公司 | Method for controlling carbon manganese steel crystal structure through rare earth lanthanum iron microalloying |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060157162A1 (en) * | 2003-03-13 | 2006-07-20 | Nippon Steel Corporation | Steel having finely dispersed inclusions |
| CN101302572A (en) * | 2008-06-12 | 2008-11-12 | 鞍钢股份有限公司 | Additive for preparing fine oxide dispersion steel and its preparation method and application |
| CN101319260A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Process method for controlling the precise addition of trace elements in steel |
| CN102373360A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Fe-La intermediate alloy for rare earth addition into steel and manufacture method thereof |
| CN102380592A (en) * | 2011-11-03 | 2012-03-21 | 内蒙古包钢钢联股份有限公司 | Rare earth adding method for throwing Fe-RE intermediate alloy into steel ladle |
-
2012
- 2012-06-20 CN CN2012102258413A patent/CN102732685A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060157162A1 (en) * | 2003-03-13 | 2006-07-20 | Nippon Steel Corporation | Steel having finely dispersed inclusions |
| CN101302572A (en) * | 2008-06-12 | 2008-11-12 | 鞍钢股份有限公司 | Additive for preparing fine oxide dispersion steel and its preparation method and application |
| CN101319260A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Process method for controlling the precise addition of trace elements in steel |
| CN102373360A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Fe-La intermediate alloy for rare earth addition into steel and manufacture method thereof |
| CN102380592A (en) * | 2011-11-03 | 2012-03-21 | 内蒙古包钢钢联股份有限公司 | Rare earth adding method for throwing Fe-RE intermediate alloy into steel ladle |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160651A (en) * | 2013-03-04 | 2013-06-19 | 内蒙古包钢钢联股份有限公司 | Rare-earth adding method of vacuum induction furnace smelting experimental steel |
| CN103205532A (en) * | 2013-04-11 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Method for adding rare earth to steel |
| CN103627847A (en) * | 2013-11-25 | 2014-03-12 | 内蒙古包钢钢联股份有限公司 | Lanthanum-cerium mixed rare earth ferroalloy for rare earth steel production |
| CN106609313A (en) * | 2017-01-24 | 2017-05-03 | 中国科学院金属研究所 | High-purity rare earth steel treatment method |
| CN106609313B (en) * | 2017-01-24 | 2019-03-26 | 中国科学院金属研究所 | A kind of high-purity rare earth steel processing method |
| CN110172543B (en) * | 2019-05-23 | 2021-03-16 | 包头钢铁（集团）有限责任公司 | Method for preventing steel flocculation in casting process of rare earth treated steel |
| CN110172543A (en) * | 2019-05-23 | 2019-08-27 | 包头钢铁（集团）有限责任公司 | A kind of method that Rare Earth Treated Steel prevents wadding steel in casting process |
| CN110512051A (en) * | 2019-09-05 | 2019-11-29 | 首钢集团有限公司 | A rare earth alloying method to avoid nodules in continuous casting |
| CN110438389A (en) * | 2019-09-16 | 2019-11-12 | 内蒙古工业大学 | A kind of high-purity rare earth steel production method |
| CN110438389B (en) * | 2019-09-16 | 2021-03-16 | 内蒙古工业大学 | Production method of high-purity rare earth steel |
| CN112226578A (en) * | 2020-09-15 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Rare earth addition control method for high-strength rare earth girder steel |
| CN114671668A (en) * | 2022-03-11 | 2022-06-28 | 钢铁研究总院有限公司 | Steel ladle refractory material for smelting rare earth steel and manufacturing method thereof |
| CN115522136A (en) * | 2022-09-20 | 2022-12-27 | 包头钢铁（集团）有限责任公司 | Method for controlling carbon manganese steel crystal structure through rare earth lanthanum iron microalloying |
| CN115522136B (en) * | 2022-09-20 | 2023-08-25 | 包头钢铁（集团）有限责任公司 | Method for controlling carbon manganese steel crystal structure through rare earth lanthanum iron microalloying |
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Application publication date: 20121017 |