CN103608472B - The secondary refining equipment of molten steel and secondary refining method - Google Patents
The secondary refining equipment of molten steel and secondary refining method Download PDFInfo
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- CN103608472B CN103608472B CN201280030436.4A CN201280030436A CN103608472B CN 103608472 B CN103608472 B CN 103608472B CN 201280030436 A CN201280030436 A CN 201280030436A CN 103608472 B CN103608472 B CN 103608472B
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- vacuum tank
- track
- vacuum
- molten steel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5294—General arrangement or layout of the electric melt shop
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- 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
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
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Abstract
In the secondary refining equipment of molten steel of the present invention, first vacuum tank and the second vacuum tank have horizontal mobile mechanism respectively, above-mentioned horizontal mobile mechanism makes above-mentioned first vacuum tank and above-mentioned second vacuum tank process position along the direction orthogonal with the length direction of the first track and the second track being positioned at above above-mentioned first track first when overlooking these first vacuum tanks and the second vacuum tank, be positioned at the second process position of the top of above-mentioned second track, clip above-mentioned first track at the first stand-by station of above-mentioned second process position opposite side with clip above-mentioned second track and flatly move between the second stand-by station of above-mentioned first process position opposite side.
Description
Technical field
The present invention relates to secondary refining equipment and the secondary refining method of molten steel being implemented continuously to secondary refining.
Background technology
The secondary refining equipment using vacuum tank to carry out the secondary refinings such as degassed process further to the molten steel obtained with the refining such as converter, electric furnace is all the time well-known.For this for secondary refining vacuum tank for, in the lower end of the main body of cylindrical shape, the soaking tub for aspirating above-mentioned molten steel from the casting ladle receiving molten steel and the soaking tub for the molten steel pumped out being back to casting ladle are installed.
And, in the secondary refining employing this vacuum tank, such as by the chassis (also referred to as bogie) for transporting casting ladle, the casting ladle receiving molten steel is transported to the below of vacuum tank, thus the molten steel received in casting ladle is drawn in vacuum tank, carry out degassed process thus.Then, the molten steel after the process being carried out degassed process by vacuum tank is back to casting ladle again.In order to carry out next treatment process, being transported the casting ladle of the molten steel after having received process by chassis, meanwhile successively the new casting ladle receiving untreated molten steel being transported to the below of vacuum tank.
In recent years, need the turnout of the senior steel grade of such secondary refining to increase, thus wish the efficiency improving secondary refining.As the method that the efficiency for realizing secondary refining improves, such as, propose in patent documentation 1: two vacuum tanks are set, and the track that setting table is automobile-used respectively in the below of each vacuum tank.
As patent documentation 1 motion, the track that setting table is automobile-used respectively in the below of multiple vacuum tank, during a vacuum tank carries out secondary refining, other vacuum tanks are that ensuing refining is prepared and carried out transporting by chassis the slight repairing work that the transport operation etc. of casting ladle or removing are attached to the vacuum tank of slag on soaking tub and so on.Processing by being used alternatingly two vacuum tanks, secondary refining can be carried out continuously.
In addition, propose in patent documentation 2: on the rotation running gear rotated, configure multiple casting ladle, this rotation running gear is rotated successively, and the multiple treatment unit thus by being configured in the optional position on the rotation round of this rotation running gear carry out refining.By the method for patent documentation 2, secondary refining can be carried out continuously when not arranging multiple track.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2003-105430 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2005-97680 publication
Summary of the invention
Invent problem to be solved
But, in above-mentioned vacuum tank, except carrying out slight repairing work, also carry out the long repairing work of needs of the exchange of soaking tub and so on the frequency of regulation.But, such as, when carrying out the repairing work of vacuum tank in the secondary refining equipment at patent documentation 1 for a long time, become and cannot use a vacuum tank and the track corresponding with it, alternately can not use two vacuum tanks so just become.Therefore, the efficiency of secondary refining can decline significantly.
In addition, in the method for patent documentation 2, when any one treatment unit on rotation round to become because of repairing work can not use time, also just become the whole process cannot carried out on the rotation round rotating running gear needed for secondary refining.Therefore, now secondary refining cannot be continued.
The present invention carries out in view of the foregoing, its object is to, even if be provided in equipment and the method that also can carry out secondary refining when carrying out secondary refining to molten steel when vacuum tank carries out long repairing work with high-level efficiency.
For the means of dealing with problems
Inventors of the present invention, in order to solve the problem thus reach above-mentioned purpose, have employed following scheme.
(1) scheme of the present invention possesses: the first vacuum tank and the second vacuum tank that molten steel are carried out to refining, the above-mentioned molten steel being positioned at these first vacuum tanks and the second vacuum tank is carried out to the vacuum pumping hardware of degassed process, the the second vacuum tank side ducts connecting above-mentioned first vacuum tank and the first vacuum tank side ducts between above-mentioned vacuum pumping hardware and be connected between above-mentioned second vacuum tank and above-mentioned vacuum pumping hardware, receive a pair first casting ladles and second casting ladle of above-mentioned molten steel, be arranged at the below of above-mentioned first vacuum tank and transport the first track of above-mentioned first casting ladle, and with above-mentioned first parallel track be arranged at the below of above-mentioned second vacuum tank and transport the second track of above-mentioned second casting ladle, wherein, when overlooking, above-mentioned first vacuum tank and above-mentioned second vacuum tank are along the direction spread configuration orthogonal with the length direction of above-mentioned first track and above-mentioned second track, above-mentioned first vacuum tank and above-mentioned second vacuum tank have horizontal mobile mechanism respectively, above-mentioned horizontal mobile mechanism makes above-mentioned first vacuum tank and above-mentioned second vacuum tank process position along the direction orthogonal with the length direction of above-mentioned first track and above-mentioned second track being positioned at above above-mentioned first track first when overlooking these first vacuum tanks and the second vacuum tank, be positioned at the second process position of the top of above-mentioned second track, clip above-mentioned first track at the first stand-by station of above-mentioned second process position opposite side with clip above-mentioned second track and flatly move between the second stand-by station of above-mentioned first process position opposite side, above-mentioned first vacuum tank side ducts and above-mentioned second vacuum tank side ducts are configured to the prescribed position between above-mentioned first vacuum tank and above-mentioned vacuum pumping hardware respectively and the prescribed position between above-mentioned second vacuum tank and above-mentioned vacuum pumping hardware freely splits, afore mentioned rules position between above-mentioned first vacuum tank side ducts and above-mentioned second vacuum tank side ducts is provided with shaft coupling, and above-mentioned shaft coupling is configured to mutually freely link between the above-mentioned first vacuum tank side ducts split and above-mentioned second vacuum tank side ducts, equal to the length being configured to the position that can split of above-mentioned second vacuum tank side ducts with from above-mentioned second vacuum tank to the length being configured to the position that can split of above-mentioned first vacuum tank side ducts from above-mentioned first vacuum tank.
(2) the secondary refining equipment of the molten steel according to above-mentioned (1), wherein, above above-mentioned first track and above above-mentioned second track, more than one the device in desulfurizer, component adjusting device, temperature control equipment and the refining plant being selected from the above-mentioned molten steel received in above-mentioned first casting ladle or above-mentioned second casting ladle can be respectively arranged with.
(3) the secondary refining equipment of the molten steel according to above-mentioned (1) or (2), it can also possess: be configured at the space between above-mentioned first vacuum tank side ducts and above-mentioned second vacuum tank side ducts and the vacuum pumping hardware side ducts be arranged on above-mentioned vacuum pumping hardware; And make above-mentioned first vacuum tank side ducts or link pipeline interconnected between above-mentioned second vacuum tank side ducts and above-mentioned vacuum pumping hardware side ducts, wherein, above-mentioned connecting piece stage property standby be formed with the reverse U shape of opening downward pipe main body portion, horizontal mobile mechanism and hoisting appliance; An end in above-mentioned pipe main body portion and the leading section of above-mentioned vacuum pumping hardware side ducts hermetic link and another end hermetic links with the above-mentioned leading section of the above-mentioned first vacuum tank side ducts adjacent with above-mentioned vacuum pumping hardware side ducts or above-mentioned second vacuum tank side ducts respectively; Above-mentioned horizontal mobile mechanism makes above-mentioned pipe main body portion flatly move to the position linked with selected above-mentioned vacuum pumping hardware side ducts and above-mentioned first vacuum tank side ducts or above-mentioned second vacuum tank side ducts; Above-mentioned hoisting appliance makes above-mentioned pipe main body portion be elevated in vertical direction, thus make each above-mentioned leading section of the both ends in above-mentioned pipe main body portion and above-mentioned first vacuum tank side ducts or above-mentioned second vacuum tank side ducts and above-mentioned vacuum pumping hardware side ducts away from or close.
(4) another scheme of the present invention is the use of the secondary refining method of the molten steel of the secondary refining equipment of the molten steel according to any one of above-mentioned (1) ~ (3), and it comprises following operation: make any one in above-mentioned first vacuum tank and above-mentioned second vacuum tank in above-mentioned first stand-by station or the standby operation of above-mentioned second stand-by station; And another making in above-mentioned first vacuum tank and above-mentioned second vacuum tank moves back and forth thus above-mentioned molten steel is carried out to the operation of secondary refining between above-mentioned first process position and above-mentioned second process position.
Invention effect
Scheme according to above-mentioned (1) ~ (4), vacuum tank is configured to move freely in the horizontal direction, therefore by such as to make a vacuum tank above the first track and above the second track between move back and forth, can molten steel be processed continuously with this vacuum tank and process.So, when any one vacuum tank needs repairing work, make other vacuum tanks above the first track and above the second track between move back and forth, thus can continue to carry out secondary refining with other vacuum tank continuously to molten steel.Thus, even if when vacuum tank carries out long repairing work, also secondary refining can be carried out with high-level efficiency.
Accompanying drawing explanation
Fig. 1 is the vertical view of the formation outline of the secondary refining equipment representing an embodiment of the invention.
Fig. 2 is the side-view of above-mentioned secondary refining equipment.
Fig. 3 be represent above-mentioned secondary refining equipment vacuum tank side ducts near explanatory view.
Fig. 4 is the longitudinal section of the flange portion periphery representing above-mentioned vacuum tank side ducts.
Fig. 5 is the sequential chart of the operation representing the secondary refining utilizing above-mentioned secondary refining equipment.
Fig. 6 is the sequential chart of the operation representing the secondary refining utilizing above-mentioned secondary refining equipment.
Fig. 7 represents the vertical view making the second vacuum tank of above-mentioned secondary refining equipment move to the state of the second stand-by station.
Fig. 8 is the sequential chart of the operation of the secondary refining representing the secondary refining equipment utilizing other embodiments of the present invention.
Fig. 9 is the sequential chart of the operation representing the secondary refining utilizing above-mentioned secondary refining equipment.
Embodiment
Below, the secondary refining equipment of the molten steel of an embodiment of the invention and secondary refining method are described.Fig. 1 and Fig. 2 is vertical view and the side-view of the secondary refining equipment 1 representing present embodiment respectively.
Secondary refining equipment 1 has: the first vacuum tank 10 and the second vacuum tank 11 molten steel being carried out to degassed process; Respectively to the first waste gas treating tank 12 and the second waste gas treating tank 13 that the waste gas from the first vacuum tank 10 and the second vacuum tank 11 processes; To the vacuum pumping hardware 14 that the atmosphere in the first vacuum tank 10 and the second vacuum tank 11 is exhausted; The vacuum pumping hardware side ducts 15 be connected with vacuum pumping hardware 14; The the first vacuum tank side ducts 16 be connected with the first vacuum tank 10 and the first waste gas treating tank 12; The the second vacuum tank side ducts 17 be connected with the second vacuum tank 11 and the second waste gas treating tank 13; And by vacuum pumping hardware side ducts 15 and the first vacuum tank side ducts 16 or the interconnected link pipeline 18 of the second vacuum tank side ducts 17.
The track 20 as the first track and the track 21 as the second track is respectively arranged with in the below of the first vacuum tank 10 and the second vacuum tank 11.Overlook with under side-looking both of these case, track 20 and track 21 are arranged in parallel to each other, and the first vacuum tank 10 and the second vacuum tank 11 are arranged along the direction orthogonal with the direction that track 20 and track 21 extend.In addition, track 20 is parallel with track 21 does not refer to track 20,21 strictly configured in parallel, and refers to such as track 20 and the orthogonal grade of track 21 thus track is not disturbed each other.On track 20,21, be respectively arranged with the first casting ladle 22 of storage molten steel, transport the first casting ladle chassis 24, second casting ladle chassis 25 of the second casting ladle 23.Be provided with not shown hoisting appliance in first casting ladle chassis 24, second casting ladle chassis 25, it can make the first casting ladle 22, second casting ladle 23 up-and-down movement respectively.
First vacuum tank 10, second vacuum tank 11 is vacuum tanks of the secondary refining method for being called as RH method, and its inside is by refractory liner.As shown in Figure 2, in the lower end of the first vacuum tank 10, second vacuum tank 11, be respectively arranged with: suction tube 10a, 11a, it is the soaking tub of the inside for the molten steel received in the first casting ladle 22, second casting ladle 23 being drawn into the first vacuum tank 10, second vacuum tank 11; With vent pipe 10b, 11b, it is the soaking tub for the molten steel after degassed process in the first vacuum tank 10, second vacuum tank 11 being discharged to the first casting ladle 22, second casting ladle 23.
First vacuum tank 10 and the second vacuum tank 11 are set to equal height respectively, and the first waste gas treating tank 12 and the second waste gas treating tank 13 are also set to equal height respectively.Between the first vacuum tank 10, second vacuum tank 11 and the first waste gas treating tank 12, second waste gas treating tank 13, first vacuum tank side ducts 16, second vacuum tank side ducts 17 is extended to horizontal direction, and it is communicated with the inside of the first vacuum tank 10, second vacuum tank 11 with the first waste gas treating tank 12, second waste gas treating tank 13 respectively.In addition, first vacuum tank side ducts 16, second vacuum tank side ducts 17 is also communicated with setting with the first waste gas treating tank 12, second waste gas treating tank 13 with the first vacuum tank 10, second vacuum tank 11 opposite side, extend with the length horizontal specified to the direction contrary with the first vacuum tank 10, second vacuum tank 11, then such as extend to vertical direction.End 16a, 17a of extending to the vertical direction of the first vacuum tank side ducts 16, second vacuum tank side ducts 17 are configured to mutually equal height each other.On end 16a, 17a, be respectively arranged with flange portion 30.In addition, the first vacuum tank side ducts 16 and the second vacuum tank side ducts 17 are also set to equal height respectively in each vacuum tank 10,11.
As shown in Figure 1, the position of the regulation in the first vacuum tank side ducts 16, second vacuum tank side ducts 17 between first vacuum tank 10, second vacuum tank 11 and the first waste gas treating tank 12, second waste gas treating tank 13, is provided with shaft coupling 31.And, be configured to freely be split as two portions respectively by this shaft coupling 31, first vacuum tank side ducts 16, second vacuum tank side ducts 17 and the first vacuum tank side ducts 16, the second vacuum tank side ducts 17 split freely links mutually.With make from the first vacuum tank 10 to the length X of the shaft coupling 31 be arranged at the first vacuum tank side ducts 16, namely from the length being configured to the position freely split of the first vacuum tank 10 to the first vacuum tank side ducts 16 with from the second vacuum tank 11 to the length Y of the shaft coupling 31 be arranged at the second vacuum tank side ducts 17, namely formed from the mode that the length being configured to the position freely split of the second vacuum tank 11 to the second vacuum tank side ducts 17 is mutually equal.
In addition, in the first waste gas treating tank 12, second waste gas treating tank 13 side of each vacuum tank side ducts 16,17 split, such as, be provided with the telescopic pipes 32 being configured to free-extension and the driving mechanism 33 striding across this telescopic pipes 32 and configuration along the axis of the first vacuum tank side ducts 16, second vacuum tank side ducts 17 as shown in Figure 3.Driving mechanism 33 is configured to the axial free-extension along the first vacuum tank side ducts 16, second vacuum tank side ducts 17, thus can freely be formed the mode that the length of the first vacuum tank side ducts 16, second vacuum tank side ducts 17 regulates.In addition, telescopic pipes 32 and driving mechanism 33 also can be arranged on the first vacuum tank 10, second vacuum tank 11 side.In addition, as telescopic pipes 32, the corrugated tube etc. of such as stainless steel can be used; As driving mechanism 33, cylinder or electronic actuator etc. can be used.
The interval that first vacuum tank 10 and the second vacuum tank 11 and the first waste gas treating tank 12 and the second waste gas treating tank 13 only separate regulation is arranged, and vacuum pumping hardware side ducts 15 is such as configured in the central authorities in the space between the first vacuum tank 10 and the second vacuum tank 11 as shown in Figure 2.Extend upward on the straight line being connected the position that the first vacuum tank side ducts 16 and the second vacuum tank side ducts 17 extend upward with the end 15a of vacuum pumping hardware 14 opposite side in vacuum pumping hardware side ducts 15, the interval when end 15a that this extends upward is to overlook between end 15a and end 16a and between end 15a with end 17a between be interposed between end 16a, the 17a being connected the first vacuum tank side ducts 16, second vacuum tank side ducts 17 straight line on configure for equally spaced mode.In addition, when end 15a is configured to side-looking and end 16a, 17a of the first vacuum tank side ducts 16, second vacuum tank side ducts 17 be equal height, thus end 15a, 16a, 17a become the state of the linearly arranged in series of level.
In addition, first vacuum tank 10, second vacuum tank 11 has horizontal mobile mechanism 40, and the direction (X-direction of Fig. 1) that this horizontal mobile mechanism 40 is orthogonal with the bearing of trend of track 20,21 when overlooking as shown in Figure 2 keeps the first vacuum tank 10, second vacuum tank 11 to make it move horizontally.
Horizontal mobile mechanism 40 possesses: the chassis 51 that the pair of guide rails 50 extended along direction orthogonal with the direction that track 20,21 extends when overlooking and being configured to moves freely at the upper surface of pair of guide rails 50.Here, orthogonally with the direction that track 20,21 extends not refer to strictly with right angle intersection, and refer to that track 20,21 intersects with guide rail 50 when such as overlooking.Pair of guide rails 50 is arranged in the mode clipping the first vacuum tank 10, second vacuum tank 11 as shown in Figure 1.In addition, guide rail 50 is commonly arranged for two the first vacuum tank 10, second vacuum tanks 11, and chassis 51 is separately arranged for the first vacuum tank 10, second vacuum tank 11.Therefore, such as first by driving mechanism 33, telescopic pipes 32 is shunk and shaft coupling 31 is split, then by making the first vacuum tank 10 utilize chassis 51 to move on guide rail 50 together with the first vacuum tank side ducts 16 split by shaft coupling 31, the position that can intersect respectively with guide rail 50 above track 20 and track 21 and when overlooking, namely the first process position P1 and second process position P2 of secondary refining carried out to the molten steel of the first casting ladle 22 and the second casting ladle 23 and clip track 20 at the first stand-by station R1 of the second process position P2 opposite side with clip track 21 freely change configuration between the second stand-by station R2 of the first process position P1 opposite side.In addition, second vacuum tank 11 is also same with the first vacuum tank 10, first by driving mechanism 33, telescopic pipes 32 is shunk and shaft coupling 31 is split, then by utilizing chassis 51 to move on guide rail 50 together with the second vacuum tank side ducts 17, freely configuration can be changed in the first process position P1, the second process between position P2, the first stand-by station R1 and the second stand-by station R2.In addition, horizontal mobile mechanism 40 can make the first vacuum tank 10 and the second vacuum tank 11 freely be configured in respectively from the first stand-by station R1 to stand-by station R2, but such as when the second vacuum tank 11 is positioned at the second stand-by station R2, the first vacuum tank 10 can not move to the second stand-by station R2.Therefore, in fact the first vacuum tank 10 is moving from the first stand-by station R1 to the second process position P2, and the second vacuum tank 11 is moving from the second stand-by station R2 to the first process position P1.In addition, such as, when the shaft coupling that use can be loaded and unloaded by making the first vacuum tank 10, second vacuum tank 11 move in the direction that guide rail 50 extends is as shaft coupling 31, not necessarily need to arrange telescopic pipes 32 and driving mechanism 33; When only arranging horizontal mobile mechanism 40, the configuration of the first vacuum tank 10, second vacuum tank 11 can be changed.
In addition, under the state that the first vacuum tank 10, second vacuum tank 11 is positioned at the first process position P1, the second process position P2, each pipeline 16,17 and first waste gas treating tank 12 side split by shaft coupling 31, the second waste gas treating tank 13 side link.Therefore, such as, under the state being positioned at the second process position P2 at the first vacuum tank 10, the first vacuum tank side ducts 16 be connected with the first vacuum tank 10 and the second vacuum tank side ducts 17 become the state connected via shaft coupling 31.Thus, no matter the first vacuum tank 10, second vacuum tank 11 is arranged in which position of the first process position P1, the second process position P2, and all becoming can with vacuum pumping hardware 14 by the formation of its inner degassed process.
As shown in Figure 2, link pipeline 18 to have: the inverted U-shaped pipe main body portion 60 that end 18a is formed downwards, the pipeline hoisting appliance 62 making the pipe moving mechanism 61 of this pipe main body portion 60 movement in the horizontal direction and pipe main body portion 60 is elevated in vertical direction.The interval between end 18a, 18a in pipe main body portion 60 becomes equal with the interval between end 15a and end 16a.In addition, the diameter of the end 18a in pipe main body portion 60 is formed as roughly the same size with the diameter of end 15a, 16a, 17a.The end 18a downward in pipe main body portion 60, is provided with flange portion 30 in the same manner as end 15a, 16a, 17a.By being arranged at end 18a and each flange portion 30 between end 15a, 16a, 17a, become in end 18a and the formation defining link surface between end 15a, 16a, 17a.
Pipe moving mechanism 61 possesses: the chassis 64 that the pair of guide rails 63 that the arranging direction along end 15a, 16a, 17a of each pipeline 15,16,17 is extended and being configured to moves freely at the upper surface of pair of guide rails 63.Pair of guide rails 50 is arranged in the mode of end 15a, 16a, 17a of clipping each pipeline 15,16,17.
Be provided with at the upper surface of chassis 64 and support pallet 65.Support pallet 65 to be made up of the four post 65a extended from the upper surface of chassis 64 to vertical direction and the framework 65b on the top being fixed on each post 65a.Pipeline hoisting appliance 62 is arranged by being supported by the framework 65b of this support pallet 65, and the silk 66 that pipeline hoisting appliance 62 is such as configured to be connected by the pipe main body portion 60 made with link pipeline 18 as shown in Figure 2 moves in the vertical direction and pipe main body portion 60 can be made to carry out up-and-down movement.In addition, as pipeline hoisting appliance 62, such as can use silk 66 is batched or is carried electric motor, with the actuator etc. of oil pressure or air pressure work.
And, with pipeline hoisting appliance 62, the end 18a in pipe main body portion 60 is being risen to each pipeline 15,16, under the state of the top of end 15a, 16a, 17a of 17, moved by chassis 51, such as in the mode making end 18a be positioned at the top of end 15a and end 16a, pipe main body portion 60 is moved, then make pipe main body portion 60 drop to the upper surface of end 15a and end 16a, by this pipe main body portion 60, vacuum pumping hardware side ducts 15 and the first vacuum tank side ducts 16 can be linked thus.In addition, similarly, make pipe main body portion 60 drop to the upper surface of end 15a and end 17a, vacuum pumping hardware side ducts 15 and the second vacuum tank side ducts 17 can be linked thus.By such operation, the switching linking pipeline 18 can be utilized to be the first vacuum tank side ducts 16 or the second vacuum tank side ducts 17 by the pipeline any switching laws be vented from vacuum pumping hardware 14.
Being arranged at the flange portion 30 of each end 15a, 16a, 17a of pipeline 15,16,17 and the end 18a of link pipeline 18, be respectively arranged with sealing element 70.Sealing element 70 is illustrated in figure 4 the such as O ring with the diameter larger than the internal diameter of each pipeline 15,16,17,18, and it is configured on the link surface of each flange portion 30.And, by because of the deadweight in pipe main body portion 60 and vacuum pumping hardware 14 and the negative pressure formed in pipeline, utilize flange portion 30 pair sealing parts 70 opposed with sealing parts 70 to press, thus become the link surface of pipeline enclosure is kept airtight structure.In addition, the configuration of sealing element 70 and quantity can at random set, and are not limited only to the content of present embodiment.
Secondary refining equipment 1 formation as described above of present embodiment, then by be divided into about the example utilizing this secondary refining equipment 1 pair of molten steel to carry out the method for refining not with the first vacuum tank 10, second vacuum tank 11 need the situation of long repairing work and and the first vacuum tank 10, second vacuum tank 11 situation of needing long repairing work simultaneously to carry out secondary refining be described.Fig. 5 and Fig. 6 is the sequential chart of the secondary refining of the molten steel utilizing secondary refining equipment 1, by operation, the first vacuum tank 10, second vacuum tank 11 implemented at the first process position P1, the second process position P2 with link the switching operation of pipeline 18 and be divided into and do not need the situation of long repairing work and the situation with repairing work with the first vacuum tank 10, second vacuum tank 11, and represent with time series order respectively.
First, when starting the refining of molten steel, such as, by processing the first casting ladle chassis 24 on track corresponding to position P1 20 with first, the first casting ladle 22 is transported to the operation S1 of first process position P1(Fig. 5).Now, the first vacuum tank 10 becomes and is positioned at the first process position P1, namely by state that the first vacuum tank side ducts 16 is connected with the first waste gas treating tank 12.In addition, the second vacuum tank 11 is such as positioned at the second stand-by station R2 as shown in Figure 7.Now, link pipeline 18 and become the state connecting vacuum pumping hardware side ducts 15 and the first vacuum tank side ducts 16.
Then, make the first casting ladle 22 increase by the first casting ladle chassis 24 of the state stopping at the first process position P1, utilize the first vacuum tank 10 pairs of molten steel to carry out secondary refining (the operation S2 of Fig. 5).At the end of the secondary refining utilizing the first vacuum tank 10, by the first casting ladle chassis 24, first casting ladle 22 is declined, first casting ladle 22 is moved on track 20 by the first casting ladle chassis 24 afterwards, thus be transported to next operation, and carry out the exchanging operation (the operation S3 of Fig. 5) of the first casting ladle 22 on the first casting ladle chassis 24.
With transport the first casting ladle 22 by the first casting ladle chassis 24 while, to be utilized by the first vacuum tank 10 horizontal mobile mechanism 40 to move to the operation S4 of second process position P2(Fig. 5 from the first process position P1 by horizontal mobile mechanism 40).Now, the first vacuum tank side ducts 16 be connected with the first vacuum tank 10 and the second vacuum tank side ducts 17 be connected with the second waste gas treating tank 13 connect via shaft coupling 31.
With mobile first vacuum tank 10 while, moved by the pipe moving mechanism 61 pairs of pipe main body portions 60 linking pipeline 18, connected the operation S5 of vacuum pumping hardware side ducts 15 and second vacuum tank side ducts 17(Fig. 5 by pipe main body portion 60).Thereby, it is possible to utilize the first vacuum tank 10 at the second process position P2 process molten steel.
During switching pipe main body portion 60 and the first vacuum tank 10, the second casting ladle 23 is transported to the operation S6 of second process position P2(Fig. 5 by the second casting ladle chassis 25 on track 21).Then, when the movement of the first vacuum tank 10 with when linking the mobile end of pipeline 18, making the second casting ladle 23 increase by the second casting ladle chassis 25, then by being configured at first vacuum tank 10 of the second process position P2, secondary refining (the operation S7 of Fig. 5) being carried out to the molten steel of the second casting ladle 23.At the end of the secondary refining that the molten steel utilizing the first vacuum tank 10 to the second casting ladle 23 carries out, second casting ladle 23 is transported to next operation by the second casting ladle chassis 25, carries out the exchanging operation (the operation S8 of Fig. 5) of the second casting ladle 23 on the second casting ladle chassis 25.Meanwhile, again implement the first vacuum tank 10 and link the switching (the operation S9 of Fig. 5 and operation S10) of pipeline 18 to the first process position P1.In addition, with switching first vacuum tank 10 with while linking pipeline 18, by the first casting ladle chassis 24, the first new casting ladle 22 is transported to the operation S11 of first process position P1(Fig. 5), when the first vacuum tank 10 with when linking the finishing switching of pipeline 18, by the first vacuum tank 10, secondary refining (the operation S12 of Fig. 5) is carried out to the first casting ladle 22.When not needing long repairing work with vacuum tank 10, as described above continuously secondary refining is carried out to molten steel.
Then, for the such as adjoint situation needing long repairing work of the first vacuum tank 10, when till the operation S3 of Fig. 5, operation terminates, such as the first vacuum tank 10 breaks down, and is described the example of the situation of the exchanging operation of the soaking tub of enforcement first vacuum tank 10.
Identical with the situation shown in Fig. 5 to the operation S3 of Fig. 6, therefore omit the description.Then, in the case of fig. 5, under make the first vacuum tank 10 move to the sight of the second process position P2 as operation S4, as shown in Figure 6, when till operation S2, operation terminates, first vacuum tank 10 breaks down, and now the first vacuum tank 10 is moved horizontally the operation T1 that mechanism 40 moves to first stand-by station R1(Fig. 6).Then, the first vacuum tank 10 implements repairing work at the first stand-by station R1.
While moving to the first stand-by station R1 with the first vacuum tank 10, the second vacuum tank 11 being positioned at the second stand-by station R2 is moved horizontally the operation T2 that mechanism 40 moves to second process position P2(Fig. 6).While moving to the second process position P2 with the second vacuum tank 11, the pipe main body portion 60 connecting the link pipeline 18 of vacuum pumping hardware side ducts 15 and the first vacuum tank side ducts 16 is moved by pipe moving mechanism 61, connects the operation T3 of vacuum pumping hardware side ducts 15 and second vacuum tank side ducts 17(Fig. 6).In addition, while linking the operation of pipeline 18, mobile second vacuum tank 11 with switching, the second casting ladle 23 is transported to the operation T4 of second process position P2(Fig. 6 by the second casting ladle chassis 25 on track 21).
Then, make the second casting ladle 23 increase by the second casting ladle chassis 25, then carry out secondary refining (the operation T5 of Fig. 6) by the molten steel of the second vacuum tank 11 to the second casting ladle 23.At the end of the secondary refining that the molten steel utilizing the second vacuum tank 11 to the second casting ladle 23 carries out, second casting ladle 23 is transported to next operation by the second casting ladle chassis 25, carries out the exchanging operation (the operation T6 of Fig. 6) of the second casting ladle 23 on the second casting ladle chassis 25.Meanwhile, the second vacuum tank 11 is made to move to the operation T7 of first process position P1(Fig. 6).In addition, by pipe moving mechanism 61, link pipeline 18 is moved, connect the operation T8 of vacuum pumping hardware side ducts 15 and first vacuum tank side ducts 16(Fig. 6).In addition, with switching second vacuum tank 11 with while linking pipeline 18, the first new casting ladle 22 is transported to the operation T9 of first process position P1(Fig. 6 by the first casting ladle chassis 24), when the second vacuum tank 11 with when linking the finishing switching of pipeline 18, by the second vacuum tank 11, secondary refining (the operation T10 of Fig. 6) is carried out to the first casting ladle 22.Then, continue to utilize the second vacuum tank 11 pairs of molten steel to carry out secondary refining continuously.
According to embodiment discussed above, being configured to the first vacuum tank 10 and the second vacuum tank can at the first process position P1, the second process position P2, moves between the first stand-by station R1 and the second stand-by station R2, therefore, such as by making vacuum tank move back and forth between the first process position P1 and second process position P2, secondary refining can be carried out by a vacuum tank continuously to molten steel.That is, even if for making any one vacuum tank in the first vacuum tank 10, second vacuum tank 11 in the standby state of stand-by station, also secondary refining can be carried out in first process position P1 and second process these two positions of position P2 to molten steel by another vacuum tank.Therefore, even if when such as needing the repairing work of the first vacuum tank 10, also can, by such as making the first vacuum tank 10 move to the first stand-by station R1 and making the second vacuum tank 11 the second stand-by station R2 is standby move back and forth between the first process position P1 and second process position P2, continue to utilize the second vacuum tank 11 pairs of molten steel to carry out secondary refining continuously.
In addition, when shown in Fig. 5 of embodiment discussed above, such as make the second vacuum tank 11 standby at the second stand-by station R2, but also such as respectively the first vacuum tank 10 can be configured in the first process position P1, second vacuum tank 11 is configured in the second process position P2, when carrying out secondary refining continuously to molten steel, only carry out the switching linking pipeline 18.Even if under these circumstances, make the vacuum tank that there occurs fault move to stand-by station, alternately carry out secondary refining by the remaining vacuum tank do not broken down at process position P1, P2, also can implement secondary refining continuously thus.Therefore, even if when carrying out the long repairing work of vacuum tank, also secondary refining can be carried out with high-level efficiency.
In addition, in the above-described embodiment, only to utilizing the steel treatment of the first vacuum tank 10 and the second vacuum tank 11 to be illustrated, but secondary refining equipment 1 also except the degassed process utilizing vacuum tank, can have the device carrying out other secondary refining process.As the device carrying out other secondary refining process, there are desulfurizer, component adjusting device, temperature control equipment, refining plant, select to arrange more than one from them.As the example of situation carrying out other secondary refining process, such as, add lime to carry out the so-called powder device for blowing as desulfurizer of desulfurization process situation to molten steel be described for being arranged through.When carrying out desulfurization process at the same time, as the powder device for blowing for carrying out this desulfurization process, the powder spray gun 80 of supply lime powder such as can be arranged at as shown in phantom in Figure 1 and clip the first vacuum tank 10 with the second vacuum tank 11 and the position opposite with the first waste gas treating tank 12 and the second waste gas treating tank 13 above track 20,21.In addition, the device carrying out this secondary refining process also can be the treatment unit of LF, bubbling treatment unit, interpolation Ca silk etc.
Fig. 8 be respectively with time sequence represent implement the position of track 20 when carrying out desulfurization process at the same time and top thereof operation, track 21 and above the operation implemented of position and the first vacuum tank 10, second vacuum tank 11 and link the sequential chart of secondary refining of switching operation of pipeline 18.Below, the secondary refining of composition graphs 8 to the molten steel of the secondary refining equipment 1 utilized when carrying out desulfurization process is simultaneously described.In addition, in fig. 8, the secondary refining of molten steel is divided into degassed process and desulfurization process represents.
When carrying out desulfurization process at the same time, first when starting the refining of molten steel, such as the first casting ladle 22 is transported to the below of powder spray gun 80 by the first casting ladle chassis 24 on track 20 and configures (the operation U1 of Fig. 8).Then, the powder of lime is supplied to the inside of the first casting ladle 22 from this powder spray gun 80, carries out desulfurization process (the operation U2 of Fig. 8) thus.
Afterwards, at the end of desulfurization process, by the first casting ladle chassis 24, the first casting ladle 22 is made to move to the operation U3 of first process position P1(Fig. 8), at the first process position P1, utilize the first vacuum tank 10 pairs of molten steel to carry out degassed process (the operation U4 of Fig. 8).At the end of the degassed process utilizing the first vacuum tank 10, implement the first casting ladle 22 successively and process the movement (the operation U6 of Fig. 8) of position P2 to the exchanging operation (the operation U5 of Fig. 8) of the transport of next operation and the first casting ladle 22, the first vacuum tank 10 to second and link the switching (the operation U7 of Fig. 8) of pipeline 18 in the same manner as the situation of the operation S3 shown in Fig. 5 ~ S5.
In addition, processing while position P1 carries out degassed process to molten steel with utilizing the first vacuum tank 10 first, the second casting ladle 23 is transported to the below of powder spray gun 80 by the second casting ladle chassis 25 on track 21 and configures (the operation U8 of Fig. 8).Then, desulfurization process (the operation U9 of Fig. 8) is carried out by the molten steel of powder spray gun 80 to the second casting ladle 23.
Afterwards, at the end of the desulfurization process of the molten steel of the second casting ladle 23, by the second casting ladle chassis 25, the second casting ladle 23 is made to move to the second process position P2 and standby (the operation U10 of Fig. 8).Then, when the first vacuum tank 10 with when linking the finishing switching of pipeline 18, at the second process position P2, the first vacuum tank 10 pairs of molten steel are utilized to carry out degassed process (the operation U11 of Fig. 8).Further, the second casting ladle 23 after degassed process being terminated is transported to next operation, carries out the exchanging operation (the operation U16 of Fig. 8) of the second casting ladle 23.
In addition, at the end of the exchanging operation of the first casting ladle with the first casting ladle 22 on chassis 24, transport the first new casting ladle 22, first casting ladle 22 by the first casting ladle chassis 24 and be transported to the below of powder spray gun 80 and configure (the operation U13 of Fig. 8).Then, at the end of the desulfurization process of the molten steel of the first casting ladle 22 (the operation U14 of Fig. 8), first casting ladle 22 is transported to the operation U15 of first process position P1(Fig. 8), at the end of utilizing the degassed process of the first vacuum tank 10 at the second process position P2, carry out the exchanging operation (the operation U16 of Fig. 8) of the second casting ladle 23, and implement the first vacuum tank 10 to the movement (the operation U17 of Fig. 8) of the first process position P1 and the switching operation (the operation U18 of Fig. 8) linking pipeline 18, degassed process (the operation U19 of Fig. 8) is carried out by the molten steel of the first vacuum tank 10 to the first casting ladle 22, this a series of operation is carried out continuously.
As mentioned above, according to above-mentioned embodiment, even if such as when add in order to the desulfurization process for molten steel arrange powder spray gun 80, as long as the length of such as advancing the track 20,21 thus to make the first casting ladle 22, second casting ladle 23 and the first casting ladle chassis 24, second casting ladle chassis 25 can move to the below of powder spray gun 80 just much of that.About this point, such as when employing the rotation running gear shown in patent documentation 2, because the diameter of required rotation round is determined according to the size of the configuration, casting ladle etc. for the treatment of unit, therefore add equipment is set time, need to increase the diameter of rotation round, namely rotate the diameter of running gear.But, in the buildings of configuration secondary refining equipment, such as there is the restriction of the configuration of coupled columns etc., be difficult under most cases to guarantee that the diameter of the setting place, particularly rotation round of the diameter specified becomes larger, become the place that the inner side being more difficult to guarantee at the diameter of rotation round does not have post etc.To this, according to above-mentioned embodiment, the arbitrary site of the obstacles such as post is not had to carry out advancing the track 20,21 as long as utilize, so the degree of freedom in configuration when additional equipment is high.
In addition, even if when carrying out desulfurization process, respectively the first vacuum tank 10 being configured in the first process position P1, the second vacuum tank 11 being configured in the second process position P2, when carrying out secondary refining continuously to molten steel, the switching linking pipeline 18 also only can be carried out.
In addition, in the above embodiment, although the powder spray gun 80 used in desulfurization process is separately positioned on track 20,21, but on track 20 and track 21, do not carry out desulfurization process as shown in Figure 8 simultaneously, therefore can arrange on powder spray gun 80 yet and same with the first vacuum tank 10, second vacuum tank 11 make it at the horizontal mobile mechanism moved horizontally with track 20,21 orthogonal directions.Now, due to desulfurization process can be carried out continuously by a powder spray gun 80, so can cost of equipment be reduced.
In addition, in fig. 8, respectively carry out respectively the molten steel with regard to the first casting ladle 22, second casting ladle 23 once utilizing the situation of the desulfurization process of the degassed disposal and utilization powder spray gun 80 of the first vacuum tank 10, second vacuum tank 11 to be illustrated, but desulfurization process such as also can have been made as shown in Figure 9 to clip utilize the degassed process of the first vacuum tank 10, second vacuum tank 11 to carry out twice.In addition, the sequential chart of Fig. 9 illustrates for arranging above-mentioned horizontal mobile mechanism on a powder spray gun 80, the first casting ladle 22, second casting ladle 23 transported on track 20 and track 21 being shared to an example of the situation of powder spray gun 80.
Composition graphs 9 is described the situation that the molten steel with regard to the first casting ladle 22, second casting ladle 23 respectively carries out twice desulfurization process.Herein, identical with the operation U4 shown in Fig. 8 to the operation U4 shown in Fig. 9, therefore omit the description, but in the embodiment shown in Fig. 9, after the end of the desulfurization process of operation U2, add and carry out making powder spray gun 80 move to the operation (the operation V1 of Fig. 9) of the top of track 21 from the top of track 20.
And, when the mobile end of the operation in operation V1 and powder spray gun 80, second casting ladle 23 is transported to the below (the operation V2 of Fig. 9) of the powder spray gun 80 after moving by the second casting ladle chassis 25 of track 21, supplied the powder of lime by powder spray gun 80, thus desulfurization process (the operation V3 of Fig. 9) is carried out to the molten steel received in the second casting ladle 23.
Then, at the end of the desulfurization process of the second casting ladle 23, make powder spray gun 80 again move to the top (the operation V4 of Fig. 9) of track 20, and make the second casting ladle 23 move to the operation V5 of second process position P2(Fig. 9 by the second casting ladle chassis 25).Meanwhile, at the end of the process that the molten steel received in utilizing the first vacuum tank 10 to the first casting ladle 22 at the first process position P1 carries out, carry out the first vacuum tank 10 to the movement (the operation V6 of Fig. 9) of the second process position P2 and the switching operation (the operation V7 of Fig. 9) linking pipeline 18, and make the first casting ladle 22 move to the below (the operation V8 of Fig. 9) of the powder spray gun 80 of the top being moved to track 20 by the first casting ladle chassis 24.Then, second time desulfurization process (the operation V9 of Fig. 9) is implemented for moving to the molten steel received in the first casting ladle 22 of the below of powder spray gun 80.The first casting ladle 22 that desulfurization process terminates is transported to next operation by the first casting ladle chassis 24, carries out the exchanging operation (the operation V10 of Fig. 9) of the first casting ladle 22 on the first casting ladle chassis 24.Further, when when the first casting ladle 22 on exchange first casting ladle chassis 24, the first new casting ladle 22 is transported to below (the operation V11 of Fig. 9) of powder spray gun 80, the molten steel for this first casting ladle 22 carries out desulfurization process (the operation V12 of Fig. 9).At the end of desulfurization process, make powder spray gun 80 move to the top (the operation V13 of Fig. 9) of track 21, and make the first casting ladle 22 move to the operation V14 of first process position P1(Fig. 9 by the first casting ladle chassis 24).
In addition, when the first vacuum tank 10 is to the movement of the second process position P2 with when linking the switching end of job of pipeline 18, at the second process position P2, degassed process (the operation V15 of Fig. 9) is carried out to the molten steel received in the second casting ladle 23.At the end of the process of molten steel utilizing the first vacuum tank 10, carry out the first vacuum tank 10 to the movement of the first process position P1 and the switching operation linking pipeline 18, and by the second casting ladle chassis 25, second casting ladle 23 is transported to the below (the operation V20 of Fig. 9) of the powder spray gun 80 of the top being moved to track 21.Then, second time desulfurization process (the operation V21 of Fig. 9) is carried out to the molten steel received in the second casting ladle 23.The second casting ladle 23 after second time desulfurization process terminates is transported to next operation by the second casting ladle chassis 25, carries out the exchanging operation (the operation V16 of Fig. 9) of the second casting ladle 23.In addition, at the end of the first vacuum tank 10 processes the movement (the operation V17 of Fig. 9) of position P1 and the switching operation (the operation V18 of Fig. 9) of link pipeline 18 to first, at the first process position P1, the molten steel of the first vacuum tank 10 to the first casting ladle 22 is utilized to carry out degassed process (the operation V19 of Fig. 9), repeatedly carry out this operation, thus continuously secondary refining is implemented to molten steel.
Even if in these cases, by horizontal mobile mechanism 40, first vacuum tank 10 and the second vacuum tank 11 are moved freely, also secondary refining can be implemented by a vacuum tank continuously to molten steel, even if therefore such as when needing the repairing work of vacuum tank 10, moving back and forth by such as making to process between position in the first process position and second at standby the second vacuum tank 11 of the second stand-by station R2, also can continue through the second vacuum tank 11 pairs of molten steel and carrying out secondary refining continuously.In addition, in the above embodiment, the situation being provided with the desulfurizer carrying out desulfurization process after degassed process is illustrated, but can select to arrange more than one on the basis of desulfurizer from component adjusting device, temperature control equipment and molten steel purification equipment, desulfurizer also can be replaced to select to arrange more than one from component adjusting device, temperature control equipment and molten steel purification equipment.In addition, when configuring each device, its configuration can be considered the machines configurations of the surrounding of secondary refining equipment 1 etc. and at random determine.
Utilizability in industry
According to the present invention, when use two vacuum tanks carry out secondary refining to molten steel, even if also secondary refining can be carried out with high-level efficiency when the long repairing work of vacuum tank.
Nomenclature
1 secondary refining equipment
10 first vacuum tanks
11 second vacuum tanks
12 first waste gas treating tanks
13 second waste gas treating tanks
14 vacuum pumping hardwares
15 vacuum pumping hardware side ducts
16 first vacuum tank side ducts
17 second vacuum tank side ducts
18 link pipeline
20 first tracks
21 second tracks
22 first casting ladles
23 second casting ladles
24 first casting ladle chassis
25 second casting ladle chassis
30 flange portion
31 shaft couplings
32 telescopic pipes
33 driving mechanisms
40 horizontal mobile mechanisms
50 guide rails
51 chassis
60 pipe main body portions
61 pipe moving mechanisms
62 pipeline hoisting appliances
63 guide rails
64 chassis
65 support pallet
66
70 sealing elements
80 powder spray guns
P1 first processes position
P2 second processes position
R1 first stand-by station
R2 second stand-by station
Claims (1)
1. a secondary refining method for molten steel, is characterized in that, it is the use of the secondary refining method of the molten steel of the secondary refining equipment of following molten steel,
The secondary refining equipment of described molten steel possesses: the first vacuum tank and the second vacuum tank that molten steel are carried out to refining; The described molten steel being positioned at these first vacuum tanks and the second vacuum tank is carried out to the vacuum pumping hardware of degassed process; The the second vacuum tank side ducts connecting described first vacuum tank and the first vacuum tank side ducts between described vacuum pumping hardware and be connected between described second vacuum tank and described vacuum pumping hardware; Receive a pair first casting ladles and second casting ladle of described molten steel; Be arranged at the below of described first vacuum tank and transport the first track of described first casting ladle; With described first parallel track be arranged at the below of described second vacuum tank and transport the second track of described second casting ladle; And the driving mechanism of axial free-extension along described first vacuum tank side ducts and described second vacuum tank side ducts,
When overlooking, described first vacuum tank and described second vacuum tank are along the direction spread configuration orthogonal with the length direction of described first track and described second track;
Described first vacuum tank and described second vacuum tank have horizontal mobile mechanism respectively, described horizontal mobile mechanism makes described first vacuum tank and described second vacuum tank process position along the direction orthogonal with the length direction of described first track and described second track being positioned at above described first track first when overlooking these first vacuum tanks and the second vacuum tank, be positioned at the second process position of the top of described second track, clip described first track at the first stand-by station of described second process position opposite side with clip described second track and flatly move between the second stand-by station of described first process position opposite side,
Described first vacuum tank side ducts and described second vacuum tank side ducts are configured to the prescribed position between described first vacuum tank and described vacuum pumping hardware respectively and the prescribed position between described second vacuum tank and described vacuum pumping hardware freely splits;
Described prescribed position between described first vacuum tank side ducts and described second vacuum tank side ducts is provided with shaft coupling, and described shaft coupling is configured to mutually freely link between the described first vacuum tank side ducts split and described second vacuum tank side ducts;
Equal to the length being configured to the position that can split of described second vacuum tank side ducts with from described second vacuum tank to the length being configured to the position that can split of described first vacuum tank side ducts from described first vacuum tank;
Wherein, the secondary refining method of described molten steel comprises following operation:
Make any one in described first vacuum tank and described second vacuum tank in described first stand-by station or the standby operation of described second stand-by station; And
Another only making in described first vacuum tank and described second vacuum tank moves back and forth thus described molten steel is carried out to the operation of secondary refining between described first process position and described second process position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/061025 WO2013161014A1 (en) | 2012-04-25 | 2012-04-25 | Secondary refining equipment and secondary refining method for molten steel |
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| CN103608472A CN103608472A (en) | 2014-02-26 |
| CN103608472B true CN103608472B (en) | 2015-09-16 |
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|---|---|
| KR (1) | KR101588942B1 (en) |
| CN (1) | CN103608472B (en) |
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| WO (1) | WO2013161014A1 (en) |
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| CN103757180B (en) * | 2014-01-06 | 2015-09-16 | 中国重型机械研究院股份公司 | A kind of RH refining furnace hot-bending pipe running gear and method |
| CN107127329B (en) * | 2016-02-29 | 2023-02-21 | 宝钢工程技术集团有限公司 | Ladle trolley transverse moving device and using method thereof |
| CN112344749A (en) * | 2020-09-29 | 2021-02-09 | 宝钢工程技术集团有限公司 | Dust removal method of VD furnace under normal pressure |
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|---|---|---|---|---|
| JPH05186815A (en) * | 1992-01-09 | 1993-07-27 | Sumitomo Metal Ind Ltd | Method for quickly changing vacuum degassing vessel |
| JP2003105430A (en) * | 2001-09-26 | 2003-04-09 | Sumitomo Metal Ind Ltd | Secondary refining apparatus and secondary refining method for molten steel |
| CN201245683Y (en) * | 2008-09-09 | 2009-05-27 | 戴汝山 | Electrohydraulic bent tube walking and elevating trolley |
| JP2010285685A (en) * | 2009-05-11 | 2010-12-24 | Nippon Steel Engineering Co Ltd | Apparatus for secondary-refining molten steel |
| CN102212654A (en) * | 2011-05-26 | 2011-10-12 | 中国重型机械研究院有限公司 | Arrangement structure of double-station RH multifunctional top lance |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2734325B2 (en) * | 1993-01-21 | 1998-03-30 | 住友金属工業株式会社 | Vacuum degassing tank replacement device |
| JP2002256329A (en) * | 2001-02-28 | 2002-09-11 | Nkk Corp | Method for replacing ladle in ladle refining facility and its apparatus |
| JP3975187B2 (en) | 2003-09-25 | 2007-09-12 | 株式会社神戸製鋼所 | Molten steel processing line |
| JP5402904B2 (en) * | 2010-10-08 | 2014-01-29 | 新日鐵住金株式会社 | Secondary refining equipment and method for molten steel |
-
2012
- 2012-04-25 KR KR1020137033490A patent/KR101588942B1/en active IP Right Grant
- 2012-04-25 CN CN201280030436.4A patent/CN103608472B/en active Active
- 2012-04-25 WO PCT/JP2012/061025 patent/WO2013161014A1/en active Application Filing
- 2012-04-25 BR BR112013032998-0A patent/BR112013032998B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05186815A (en) * | 1992-01-09 | 1993-07-27 | Sumitomo Metal Ind Ltd | Method for quickly changing vacuum degassing vessel |
| JP2003105430A (en) * | 2001-09-26 | 2003-04-09 | Sumitomo Metal Ind Ltd | Secondary refining apparatus and secondary refining method for molten steel |
| CN201245683Y (en) * | 2008-09-09 | 2009-05-27 | 戴汝山 | Electrohydraulic bent tube walking and elevating trolley |
| JP2010285685A (en) * | 2009-05-11 | 2010-12-24 | Nippon Steel Engineering Co Ltd | Apparatus for secondary-refining molten steel |
| CN102212654A (en) * | 2011-05-26 | 2011-10-12 | 中国重型机械研究院有限公司 | Arrangement structure of double-station RH multifunctional top lance |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112013032998A2 (en) | 2017-01-31 |
| KR101588942B1 (en) | 2016-01-26 |
| BR112013032998B1 (en) | 2020-05-12 |
| WO2013161014A1 (en) | 2013-10-31 |
| KR20140008530A (en) | 2014-01-21 |
| CN103608472A (en) | 2014-02-26 |
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Address after: Tokyo, Japan Patentee after: Nippon Iron & Steel Corporation Address before: Tokyo, Japan Patentee before: Nippon Steel Corporation |