CN100999773A - Rotating steel ladle refining furnace - Google Patents
Rotating steel ladle refining furnace Download PDFInfo
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- CN100999773A CN100999773A CN 200610161671 CN200610161671A CN100999773A CN 100999773 A CN100999773 A CN 100999773A CN 200610161671 CN200610161671 CN 200610161671 CN 200610161671 A CN200610161671 A CN 200610161671A CN 100999773 A CN100999773 A CN 100999773A
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Abstract
The rotary ladle refining furnace includes one ladle for holding molten steel and at least three ladle setting sites, including ladle hoisting site, heating site and quieting site around the ladle turning device. The present invention has the advantages of compact structure, powerful function and high production efficiency.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of rotating steel ladle refining furnace that adopts electric arc furnace, uses when converter is made steel.
Background technology
In the existing STEELMAKING PRODUCTION process, usually adopt the production line of " converter or Electric furnace steel making be furnace just---ladle refining furnace---vacuum-treat stove---continuous caster ", for efficient, low consumption with stably smelt the high-quality steel, ladle refining furnace has become indispensable key equipment in this production line.Ladle refining furnace mainly has following functions and effect in steelmaking process: one, the temperature of molten steel is controlled: by the electric-arc heating to molten steel, adjust molten steel temperature, to satisfy the requirement of subsequent handling, process requirement to molten steel temperature as follow-up vacuum-treat, continuous casting; Two, to the control of the composition of molten steel: by in molten steel, adding alloy, adjust the molten steel composition, with the requirement of the steel that satisfies different varieties to chemical ingredients; Three, the deoxidation of molten steel and desulfurization: by adding reductor and various slag charge, the control slag composition carries out the deoxidation and the desulfurization of molten steel, with the requirement to oxygen and sulphur content of the steel that satisfies different varieties; Four, the dark desulfurization of molten steel: stir by ladle bottom gas permeable brick blowing argon gas in molten steel, strengthen mixing and reaction between molten steel and the slag, make molten steel desulfurization rapidly and deep desulfuration, to satisfy of the requirement of some special steel material to sulphur content; Five, the homogenizing of molten steel temperature and composition: by the ladle bottom blowing argon gas being stirred the temperature and the composition of even molten steel; Six, to the control of non-metallic inclusion form in the molten steel: by in molten steel, adding some calcium containing alloy cored-wires, non-metallic inclusion in the molten steel is carried out modification handle, to satisfy not to the requirement of steel to molten steel casting performance, steel processing, use properties; Seven, to the control of molten steel cleanness: by molten steel bottom blowing argon gas is stirred, make and float to the molten steel surface on the particulate inclusions bigger in the molten steel, and by steel---the slag absorption on the slag interface, cleaning molten steel and the further oxygen level that reduces in the molten steel are to satisfy the requirement of different varieties steel to molten steel cleanness; Eight, as the snubber of STEELMAKING PRODUCTION: can be used as steel-making such as the electric furnace of discontinuous production or the converter snubber that transmits of furnace and molten steel between the quantity-produced continuous caster just, making steelshop can be that central tissue produces with the continuous casting, guarantees the high production efficiency of steelworks.
Adopt ladle refining furnace not only can accurately control the composition of molten steel, molten steel is carried out deoxidation, desulfurization processing, non-metallic inclusion is carried out denaturing treatment, molten steel is carried out soft stirring with cleaning molten steel, but also can be used as molten steel buffered station between steel melting furnace and the continuous caster, to coordinate the contradiction between discontinuous production of steel melting furnace and the continuous caster continuous production, give full play to both advantages, faster production rhythm is enhanced productivity.As seen, the metallurgical function of the ladle refining furnace of bringing into play is to high yield, low cost with stably produce the high-quality steel iron product and have a very important role.In addition, use ladle refining furnace and can also improve the steel-making output of furnace just greatly, reduce furnace tapping temperature just.For converter production, can reduce and blow rate again, reduce molten steel oxidation and metal loss; For electric arc furnace production, its original refining function can be transferred to ladle refining furnace, throughput is increased substantially.Yet, finish these metallurgical functions of ladle refining furnace, need certain refining time.In steelmaking process, operation such as the intensification of molten steel in the ladle refining furnace, alloy ingredient adjustment, deoxidation and desulfurization and sampling, required time of thermometric were generally 30-40 minute; It is 2-3 minute that required time is handled in the molten steel line feeding; The soft stirring required time of BOTTOM ARGON BLOWING is 10-15 minute; Other time as bull ladle and wait needs 5 minutes at least.Therefore, the treatment time of ladle refining furnace is generally all greater than 45 minutes.Require height for some desulfurization, or alloy addition is big, or the molten steel tapping temperature is low, or needs vacuum refinement, or the demanding steel of purity, then be greater than the tap to tap time of ladle refining furnace 50 minutes.Yet the smelting cycle of converter and ultra-high power electric arc furnace one heat steel generally all is no more than 40 minutes; The duration of pouring of continuous caster one heat steel is also less than 40 minutes.As seen, ladle refining furnace is smelted required time will be longer than the tap to tap time of converter or electric arc furnace and the duration of pouring of continuous casting, thereby makes ladle refining furnace become the limiting element of the excellent product of steelworks high yield.
In order to solve ladle refining furnace and steel melting furnace, continuous caster not matching in time, people have adopted the ladle refining furnace of double, and promptly a cover heated by electrodes system handles stations for two, with the heating of ladle refining furnace and non-heat treated separately.During use, a station is carrying out the heat temperature raising processing, and another station then can carry out line feeding and soft stir process.The steel mill that has is in order to guarantee the processing quality of ladle refining furnace, even adopts the way that increases a ladle refining furnace, to guarantee enough refining times.Though aforesaid method can be coordinated the time matching problem between ladle refining furnace and steel melting furnace, the continuous caster effectively, still can not fundamentally improve the production efficiency of ladle refining furnace, also have a lot of limitation in the use.
Summary of the invention
The object of the present invention is to provide a kind of a plurality of stations that have, can realization and steel melting furnace, continuous caster between the production time coupling, the rotating steel ladle refining furnace of enhancing productivity.
Further purpose of the present invention is to provide a kind of ladle that can make things convenient for to move, and the comparatively simple rotating steel ladle refining furnace of running gear structure.
Further again purpose of the present invention is to provide a kind of rotating steel ladle refining furnace that can conveniently be arranged on the pivot arm.
For realizing purpose of the present invention, a kind of rotating steel ladle refining furnace, comprise the ladle that is used to hold molten steel, and the station of ladle is set, described ladle station number is provided with three at least, they are respectively bull ladle station, heating station and calm station, these stations be separately positioned on the ladle turning device around.
For realizing further purpose of the present invention, a kind of rotating steel ladle refining furnace, also comprise: described ladle turning device includes central principal axis, be arranged on some on the central principal axis to pivot arm, and the travelling wheel that is arranged on below, pivot arm end, the ladle that needs to move is separately positioned on the paired pivot arm, few one of the logarithmic ratio station number of pivot arm.
For realizing further again purpose of the present invention, a kind of rotating steel ladle refining furnace also includes: described ladle is arranged on the supporting seat of every pair of pivot arm by the gudgeon of its both sides respectively.
Advantage of the present invention is: this apparatus structure compactness, function are strong, owing to be provided with a plurality of ladle stations and pivot arm, so its working efficiency obviously improves; When smelting the high-quality steel, can make the time coupling between its realization and the road, front and back, give full play to the potential of production unit.
Below in conjunction with accompanying drawing rotating steel ladle refining furnace of the present invention is described in further detail:
Description of drawings
The synoptic diagram that Fig. 1 arranges for four stations of a kind of rotating steel ladle refining furnace of the present invention;
Fig. 2 is the structural representation of a kind of rotating steel ladle refining furnace bull ladle station and heating station;
Fig. 3 is the structural representation of the calm station of a kind of four station rotating steel ladle refining furnaces;
General operation process flow sheet when Fig. 4 is the work of a kind of four station rotating steel ladle refining furnaces;
Operation technological process figure when Fig. 5 is a kind of four station rotating steel ladle refining furnace ladle reheat;
Another operation technological process figure when Fig. 6 is a kind of four station rotating steel ladle refining furnace ladle reheat;
The synoptic diagram that Fig. 7 arranges for three stations of the another kind of rotating steel ladle refining furnace of the present invention;
General operation process flow sheet when Fig. 8 is the work of a kind of three station rotating steel ladle refining furnaces;
Operation technological process figure when Fig. 9 is a kind of three station rotating steel ladle refining furnace ladle reheat;
Another operation technological process figure when Figure 10 is a kind of three station rotating steel ladle refining furnace ladle reheat.
Among the figure: 1, ladle, 2, the bull ladle station, 3, heating station, 4, calm station, 5, central principal axis, 6, pivot arm, 7, travelling wheel, 8, gudgeon, 9, supporting seat, 10, wait for station.
Embodiment
Below in conjunction with accompanying drawing rotating steel ladle refining furnace of the present invention is described in further detail:
As shown in Figure 1, 2, 3, be a kind of rotating steel ladle refining furnace, comprise four stations that are used to be provided with ladle 1, be respectively bull ladle station 2, wait for station 10, heating station 3 and calm station 4, central principal axis 5 is arranged on the centre of these four stations, three pairs of pivot arms 6 are separately positioned on the central principal axis 5, and can be the respectively independent pivot arm 6 that moves of this three couple can move to ladle 1 on arbitrary station in the above-mentioned station.Wherein, acting as of bull ladle station 2: overhead traveling crane will treat that the ladle 1 of refining treatment hangs in the ladle 1 that finishes with refining treatment and hangs out; Wait for acting as of station 10: the ladle 1 that has loaded is waited for refining treatment; Acting as of heating station 3: addings such as electric-arc heating and various alloy, slag making material, adjust molten steel temperature and composition, and carry out deoxidation and desulfurization operations; Acting as of calm station 4: line feeding and soft stirring, control wherein non-metallic inclusion form and molten steel cleanness.The bull ladle station 2 of this refining furnace is ready it all the time in the production of steelshop, at any time from last process---and first furnace (being converter and electric arc furnace) is accepted molten steel, and to next procedure---vacuum degassing furnace or continuous caster provide qualified molten steel.The calm station 4 of this refining furnace and separating of heating station 3 have been eliminated the high quality steel grade, and during particularly pure steel was produced, soft churning time was not enough, and the refining furnace operation becomes the problem of production bottleneck.The wait station 10 of this refining furnace makes ladle 1 moving between each station, makes ladle 1 reheat convenient especially.
Above-mentioned rotating steel ladle refining furnace has three pairs of pivot arms that independently move 6 minutes, is not installed on the central principal axis 5, and pivot arm 6 is a semi-enclosed skeleton construction, is made up of two open arms.Be respectively arranged with supporting seat 9 on the pivot arm 6, be provided with mobile travelling wheel 7 and drive unit independently thereof below the pivot arm 6, each pivot arm 6 can rotate around central principal axis 5 respectively, and travelling wheel 7 is made circumferential motion along a circuit orbit simultaneously.
When reality was used, above-mentioned each station all had special locating device, controlled each ladle 1 and moved to accurate location; Drive unit guarantees that the ladle 1 on the pivot arm 6 moves reposefully, and the rotation of each pivot arm 6 is moved and is provided with interlock, in case collision mutually between the moving process ladle.Also be respectively arranged with a cover ladle bottom blowing gas stirring system on every pair of pivot arm 6, the rare gas element that stirs usefulness can be connected to each on the arm from pivot arm 6 rotating shaftes by swivel joint and slip ring.
Basic craft course when rotating steel ladle refining furnace of the present invention is smelted is:
1, the molten steel in the ladle adds slag making material such as a certain amount of lime in the molten steel of ladle after refining just, by driving this ladle is winched to the bull ladle station 2 that rotates rotating steel ladle refining furnace then, connects bottom blowing inertia source of the gas molten steel is stirred.In each ladle refining process subsequently, need that all ladle is carried out the bottom blowing gas mixing and mix;
If 2 ladle refinings finish, ladle need move to bull ladle station 2 from calm station 4 and hang out, and heating station 3 still has ladle when handling, and the ladle that newly hangs in will move to from bull ladle station 2 and wait for station 10;
If 3 heating stations 3 are free, when handling ladle, the ladle that newly hangs in will directly not move to heating station 3 from bull ladle station 2, or from waiting for that station 10 moves to heating station 3;
4, ladle is on heating station 3, and the molten steel in the ladle carries out electric-arc heating and heats up, changes operations such as slag, alloying, deoxidation, desulfurization, thermometric and sampling under clad;
5, after the temperature of molten steel and Composition Control reached target value, ladle was moved to calm station 4;
6, ladle is on calm station 4, carries out stirring, line feeding at the bottom of the rare gas element under the condition of adding a cover, survey is steady and sampling operation, carries out nonmetallic inclusionsin steel deformation process and the processing of pureization of molten steel;
If 7 steel compositions at night need to adjust, can on calm station 4, carry out trimming by some alloys of a small amount of interpolation;
If 8 molten steel temperatures are lower, or a variety of causes need can move to heating station 3 with ladle and carry out warming temperature molten steel heating under the situation that heating station 3 is had time; Or stop just carrying out the ladle heat treated at this station, and this ladle is moved to wait station 10, the ladle that will need then to heat up once more is from waiting for that station 10 moves to heating station 3 and handles.After molten steel temperature reaches target value, this ladle is moved to calm station 4 handle, or directly move to bull ladle station 2;
9, ladle is had time as bull ladle station 2 after calm station 4 disposes, and can move to bull ladle station 2; Do not have as bull ladle station 2 empty, the ladle of this station can be moved to wait for station 10 after, again ladle is moved to bull ladle station 2;
10, finish the ladle that ladle refining handles and move to bull ladle station 2, break away from after the bottom blowing rare gas element connects, ladle is hung to vacuum outgas or continuous caster by overhead traveling crane.
As shown in Figure 4, general operation technological process for a kind of four station rotating steel ladle refining furnaces, for convenience of description, at Fig. 4 of the present invention, 5,6,8, in 9 and 10,1. represent the bull ladle station, 2. represent wait work, 3. represent heating station, 4. represent calm station, circle is empty for dotted line Shi Ze represents this station, circle has ladle handling on this station for solid line Shi Ze represents, 1,2,3, the 4# stove represents the 1st respectively, 2,3,4 stove ladles, below process flow sheet diagram implication among each embodiment all identical, this technological process comprises A, B, C, D, six portions of E and F are rapid:
1. A, bull ladle station accept the 1st stove ladle;
B, the 1st stove ladle from the bull ladle station 1. or wait for that 3. 2. station move to heating station, 1. the bull ladle station accepts the 2nd stove ladle;
4. C, the 1st stove ladle move to calm station, the 2nd stove ladle from the bull ladle station 1. or wait for that 3. 2. station move to heating station, 1. the bull ladle station accepts the 3rd stove ladle;
1. 4. D, the 1st stove ladle move to the bull ladle station from calm station, and 4. 3. the 2nd stove ladle move on to calm station from heating station, and 3. 1. the 3rd stove ladle move on to heating station from the bull ladle station;
1. E, the 1st stove ladle hang the bull ladle station;
1. F, bull ladle station accept the 4th stove ladle.
In the general operation technological process of rotating steel ladle refining furnace, each ladle all rotates along same direction.
As shown in Figure 5, be a kind of four station rotating steel ladle refining furnace ladle reheat operating procedure processes, description be the technological process that needs reheat at calm station ladle 4., comprise A, B, C, D, six steps of E, F:
4. A, the 1st stove ladle are positioned at calm station, the 2nd stove ladle at heating station 3., 1. the bull ladle station accepts the 3rd stove ladle;
3. B, the 2nd stove ladle move to from heating station and wait for station 2., and 3. 4. the 1st stove ladle move to heating station from calm station;
4. 3. C, the 1st stove ladle move to calm station from heating station, and the 2nd stove ladle is from waiting for that 3. 2. station move to heating station, and 1. the 3rd stove ladle moves to from the bull ladle station and wait for station 2.;
1. 4. D, the 1st stove ladle move to the bull ladle station from calm station, and 4. 3. the 2nd stove ladle move to calm station from heating station, and the 3rd stove ladle is from waiting for that 3. 2. station move on to heating station;
1. E, the 1st stove ladle hang the bull ladle station.
1. F, bull ladle station accept the 4th stove ladle.
Wherein, steps A is general refining ladle location status, through sequence of operations, the 1st stove ladle is carried out having got back to the step F identical with the steps A state again after reheat handles, and just the ladle on each station has been pushed ahead one in proper order.The ladle of rotating steel ladle refining furnace is in reheat operating procedure process, and each ladle can rotate along different directions.
As shown in Figure 6, another operation technological process figure during for a kind of four station rotating steel ladle refining furnace ladle reheat comprises A, B, C, D, E, F, seven steps of G:
1. A, the 1st stove ladle are positioned at the bull ladle station, and 4. the 2nd stove ladle is positioned at calm station, and 3. the 3rd stove ladle is positioned at heating station;
1. B, the 1st stove ladle move to from the bull ladle station and wait for station 2., and 1. 4. the 2nd stove ladle move to the bull ladle station from calm station, and 4. 3. the 3rd stove ladle move to calm station from heating station;
C, the 1st stove ladle are from waiting for that 3. 2. station move to heating station;
D, the 1st stove ladle reheat finish, and 3. move to from heating station and wait for station 2., and 4. 1. the 2nd stove ladle move to calm station from the bull ladle station, and 3. 4. the 3rd stove ladle move to heating station from calm station;
E, the 1st stove ladle are from waiting for that 1. 2. station move to the bull ladle station;
1. F, the 1st stove ladle hang the bull ladle station;
1. G, the 4th stove ladle hang in the bull ladle station.
As shown in Figure 7, for the station of another kind of three station rotating steel ladle refining furnaces is arranged synoptic diagram, omitted the wait station in this embodiment 2., be equivalent to and wait for that 2. station unites two into one with bull ladle station function 1., therefore, other structure of this rotating steel ladle refining furnace and basic technology and aforesaid embodiment are basic identical.
As shown in Figure 8, the general operation process flow sheet when working for a kind of three station rotating steel ladle refining furnaces comprises A, B, C, D, E, F, seven steps of G:
1. A, the 1st stove ladle hang in the bull ladle station;
3. 1. B, the 1st stove ladle move to heating station from the bull ladle station, and 1. the 2nd stove ladle hangs in the bull ladle station;
4. 3. C, the 1st stove ladle move to calm station from heating station; 3. 1. the 2nd stove ladle move to heating station from the bull ladle station;
1. 4. D, the 1st stove ladle move to the bull ladle station from calm station;
1. E, the 1st stove ladle hang the bull ladle station;
1. F, the 3rd stove ladle hang in the bull ladle station;
4. 3. G, the 2nd stove ladle move to calm station from heating station, and 3. 1. the 3rd stove ladle move to heating station from the bull ladle station.
As shown in Figure 9, the operation technological process figure during for a kind of three station rotating steel ladle refining furnace ladle reheat comprises A, B, C, D, E, F, seven steps of G:
4. A, the 1st stove ladle are positioned at calm station, and 3. the 2nd stove ladle is positioned at heating station;
1. 3. B, the 2nd stove ladle move to the bull ladle station from heating station, and 3. 4. the 1st stove ladle move to heating station from calm station;
C, the 1st stove ladle reheat finish, and 3. move to calm station 4. from heating station, and 3. 1. the 2nd stove ladle move to heating station from the bull ladle station;
1. 4. D, the 1st stove ladle move to the bull ladle station from calm station, and 4. 3. the 2nd stove ladle move to calm station from heating station;
E, the 1st stove ladle hang and move the bull ladle station 1.;
1. F, the 3rd stove ladle hang in the bull ladle station;
4. 3. G, the 2nd stove ladle move to calm station from heating station, and 3. 1. the 3rd stove ladle move to heating station from the bull ladle station.
As shown in figure 10, another operation technological process figure during for a kind of three station rotating steel ladle refining furnace ladle reheat comprises A, B, C, D, E, F, eight steps of G, H:
1. A, the 1st stove ladle hang in the bull ladle station;
3. 1. B, the 1st stove ladle move to heating station from the bull ladle station, and 1. the 2nd stove ladle hangs in the bull ladle station;
4. 3. C, the 1st stove ladle move to calm station from heating station, and 3. 1. the 2nd stove ladle move to heating station from the bull ladle station;
1. 4. D, the 1st stove ladle move to the bull ladle station from calm station;
4. 3. E, the 2nd stove ladle move to calm station from heating station;
3. 1. F, the 1st stove ladle move to heating station from the bull ladle station;
G, the heating of the 1st stove ladle finish, and 3. move to the bull ladle station 1. from heating station;
1. H, the 1st stove ladle hang the bull ladle station, and 1. the 3rd stove ladle from hanging in the bull ladle station.
Claims (5)
1, a kind of rotating steel ladle refining furnace, comprise the ladle (1) that is used to hold molten steel, and the station of ladle (1) is set, it is characterized in that: described ladle (1) station number is provided with three at least, they are respectively bull ladle station (2), heating station (3) and calm station (4), these stations be separately positioned on the ladle turning device around.
2, a kind of rotating steel ladle refining furnace according to claim 1 is characterized in that: be provided with bull ladle station (2) around the described ladle turning device, wait for station (10), heating station (3) and (4) four stations of calm station.
3, a kind of rotating steel ladle refining furnace according to claim 1 and 2, it is characterized in that: described ladle turning device includes central principal axis (5), be arranged on some on the central principal axis (5) to pivot arm (6), and the travelling wheel (7) that is arranged on below, pivot arm (6) end, the ladle (1) that needs to move is separately positioned on the paired pivot arm (6), few one of the logarithmic ratio station number of pivot arm (6).
4, a kind of rotating steel ladle refining furnace according to claim 1 and 2 is characterized in that: described ladle (1) is arranged on the supporting seat (9) of every pair of pivot arm (6) by the gudgeon (8) of its both sides respectively.
5, a kind of rotating steel ladle refining furnace according to claim 1 and 2 is characterized in that: be respectively arranged with a cover ladle bottom blowing gas device on described each pivot arm (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101616711A CN100465292C (en) | 2006-12-19 | 2006-12-19 | Rotating steel ladle refining furnace |
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| CNB2006101616711A CN100465292C (en) | 2006-12-19 | 2006-12-19 | Rotating steel ladle refining furnace |
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| CN100465292C CN100465292C (en) | 2009-03-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804449A (en) * | 2010-03-30 | 2010-08-18 | 天津钢管集团股份有限公司 | Method for controlling material taking sequence for hooking cart of continuous caster |
| CN103924039A (en) * | 2014-04-30 | 2014-07-16 | 江苏大峘集团有限公司 | Rotary multi-station hot metal pretreatment system and method |
| CN112877506A (en) * | 2021-01-07 | 2021-06-01 | 中国重型机械研究院股份公司 | RH turntable type steel ladle receiving and vacuum tank dip pipe maintenance device and method |
| CN113502378A (en) * | 2021-07-16 | 2021-10-15 | 鞍钢集团工程技术有限公司 | RH vacuum treatment and wire feeding system and online wire feeding method |
| CN114381573A (en) * | 2021-12-28 | 2022-04-22 | 北京首钢自动化信息技术有限公司 | Control method, device, equipment and medium for electrode in ladle refining furnace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8501823A (en) * | 1985-06-25 | 1987-01-16 | Hoogovens Groep Bv | APPARATUS FOR TRANSPORTING CASTERS TO A CONTINUOUS CASTING MACHINE. |
| DE3671850D1 (en) * | 1985-10-04 | 1990-07-19 | Danieli Off Mecc | DEVICE FOR HANDLING CUPCUPLES. |
| IT1201815B (en) * | 1986-09-25 | 1989-02-02 | Danieli Off Mecc | TRANSFORMATION PLANT OF A METAL CHARGE IN SEMIPRODUCTS AND RELATED MELTING AND CASTING PROCESS |
| JP3975187B2 (en) * | 2003-09-25 | 2007-09-12 | 株式会社神戸製鋼所 | Molten steel processing line |
-
2006
- 2006-12-19 CN CNB2006101616711A patent/CN100465292C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804449A (en) * | 2010-03-30 | 2010-08-18 | 天津钢管集团股份有限公司 | Method for controlling material taking sequence for hooking cart of continuous caster |
| CN103924039A (en) * | 2014-04-30 | 2014-07-16 | 江苏大峘集团有限公司 | Rotary multi-station hot metal pretreatment system and method |
| CN112877506A (en) * | 2021-01-07 | 2021-06-01 | 中国重型机械研究院股份公司 | RH turntable type steel ladle receiving and vacuum tank dip pipe maintenance device and method |
| CN113502378A (en) * | 2021-07-16 | 2021-10-15 | 鞍钢集团工程技术有限公司 | RH vacuum treatment and wire feeding system and online wire feeding method |
| CN114381573A (en) * | 2021-12-28 | 2022-04-22 | 北京首钢自动化信息技术有限公司 | Control method, device, equipment and medium for electrode in ladle refining furnace |
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| Publication number | Publication date |
|---|---|
| CN100465292C (en) | 2009-03-04 |
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