JP4109239B2 - Hot metal supply method to converter - Google Patents

Description

  The present invention relates to a hot metal supply method to a converter.

As is well known, the hot metal produced in the blast furnace is loaded into a kneading car (torpit car) and then transferred to a converter process for adjusting the components of the hot metal. Further, in the kneading vehicle, the auxiliary raw material is introduced into the hot metal charged therein, and dephosphorization, desiliconization, and desulfurization are performed to preliminarily perform hot metal component adjustment processing (hot metal preliminary processing). Process).
In the converter process, molten iron is charged into the converter, dephosphorization and decarburization are performed by adding auxiliary materials and blowing oxygen to produce molten steel with a predetermined phosphorus concentration and carbon concentration. Like to do. The molten steel obtained in the converter process is then formed into a slab or the like through a continuous casting process, and steel products such as thick plates and thin plates are manufactured by rolling the slab (rolling step).

In order to increase the production volume of steel products, it is important to pay attention to the blast furnace process and increase the amount of hot metal discharged from the blast furnace, but the production capacity in other processes, for example, the hot metal pretreatment process, is important. It is also important to raise. Techniques for improving the production capacity of each process are disclosed in Patent Documents 1 to 3, for example.
Patent Document 1 focuses on the blast furnace process and considers the operating status (distribution status) of the hot metal transport container between the blast furnace and the steelmaking factory to verify the balance of the storage amount between the blast furnace and the steelmaking factory. Techniques for preventing steel failure are disclosed.

Patent Document 2 pays attention to the hot metal preliminary process, and has a plurality of process patterns for processing an object to be processed in lot units, and in the hot metal preliminary process line that executes the processes according to the plurality of process patterns in parallel, the payout process A physical distribution simulation method capable of setting an in-process amount at a proper value is disclosed.
Patent Document 3 discloses a logistics planning technique that focuses on the rolling process and focuses on the flow (distribution) of the rolled material until the heating furnace is charged, and considers the improvement of the production amount in the slab rolling process.
On the other hand, regarding the converter process, it is the processing capacity of the converter itself and the hot metal supply capacity to the converter that are related to the molten steel production capacity. If a plurality of converters are operated simultaneously, the processing capacity of the converter exceeds the hot metal supply capacity to the converter, and the hot metal supply capacity to the converter becomes rate-limiting. In other words, how efficiently and quickly the hot metal supply to the converter is performed is very important.

Patent Document 4 discloses a distribution technology for efficiently handling a ladle in a part of the converter process in order to improve the hot metal supply capacity to the converter. The converter equipment disclosed in this document has one crane, two ladles, one transport cart for conveying the ladle, and a ladle set device between the two converters. The ladle set device is arranged so as to straddle the traveling rail, and has a function of lowering the ladle after receiving an empty ladle from a crane and mounting the ladle on a transport cart.
As a result, two ladles can be used alternately for one transport cart, and even if one ladle is being charged into the decarburization converter, the other ladle can be used. The pan can be quickly moved to the outlet of the dephosphorization converter.
JP 2003-82407 A (pages 4 to 8) JP 2002-62924 A (pages 3 to 5) JP-A-10-272505 (pages 3 to 7) Japanese Patent No. 3503938 (pages 4 to 5, FIG. 5)

Usually, a converter facility has a plurality of converters, a plurality of ladle for charging molten iron into these converters, and a “dispensing station” (place for discharging) that discharges hot metal from the kneading car to the ladle. As shown in Fig. 3 (a), the ladle loaded with molten iron is transported between multiple converters and stations by a crane, and only pays attention to the movement of the ladle. However, it is a complicated logistics form.
The inventor of the present application examined the operating conditions of the ladle and the crane in detail based on the Gantt chart of FIG. 3 (a) in order to find a method for improving the molten steel production capacity in the converter process, and the results And found that it is necessary to operate the crane without waiting time. In order to reduce the waiting time of the crane, for example, it is preferable that the hot metal dispensing is already completed in the ladle of the adjacent dispensing station when the empty ladle is installed in the dispensing station. By doing so, after installing the empty ladle, the crane can lift the ladle charged with hot metal without waiting.

However, if the number of ladle operations is less than the number of dispensing stations, after placing an empty ladle on the ladle, another ladle that has been dispensed with hot metal cannot be suspended and the crane has a waiting time. Arise. Considering this, the number of ladle operations needs to be greater than the number of payout stations.
However, a technique for determining how many ladles should be specifically determined has not been established, and the technique of Patent Document 4 described above focuses only on a part of the converter process. Therefore, it is difficult to solve this problem and greatly improve the hot metal supply capacity to the converter. On the other hand, it is very difficult to apply the physical distribution technology of Patent Documents 1 to 3 to the converter equipment.

  Then, in view of the above problems, the present invention aims to provide a hot metal supply method to a converter that can efficiently supply hot metal to the converter by increasing the number of ladles operated. To do.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problems in the present invention includes a converter, a ladle for charging a molten iron into the converter, a payout station molten iron payout to the ladle from torpedo car is carried out, the The converter has a crane that handles the ladle to carry in or out the ladle, and the ladle operation number is set to “number of payout stations + 1”, and the ladle is moved by the crane. The hot metal is supplied to the converter after handling.

This expresses the idea of reducing the play time and waiting time of the crane as much as possible at the dispensing station in order to shorten the cycle time of the crane.
That is, in order to reduce the waiting time of the crane, it is preferable that the hot metal discharge is already completed in the ladle of the adjacent discharge station when the empty ladle is installed in the discharge station. By doing so, after installing the empty ladle, the crane can lift the ladle charged with hot metal without waiting. However, if the number of ladle operations is less than the number of dispensing stations, after placing an empty ladle on the ladle, another ladle that has been dispensed with hot metal cannot be suspended and the crane has a waiting time. Arise.

Considering this, the number of ladle operations must be equal to or greater than the number of payout stations. In particular, the ladle that carries hot metal to the converter is more efficient by setting the number of ladle operations to the number of payout stations + 1. And a large amount of hot metal can be supplied to the converter.
At this time, the converter equipment has a removal station for discharging the slag in the ladle, and the crane handles the ladle so as to carry the ladle into and out of the discharge station and the removal station. The take-out station and the demolition station are provided adjacent to each other in the direction of movement of the crane or separated by one or more cranes, and the ladle is arranged so as to enable simultaneous placement on the pay-out station and the demolition station. Can be handled with a crane.

By setting the number of ladle operations to be the number of payout stations + 1, the number of ladles handled by the crane increases, and the possibility that the cranes will come together increases. The term “crane engagement” as used herein means, for example, that a plurality (two) of cranes are arranged on the same rail, move in a direction in which both face each other, and are in a mate state.
For example, in a conventional converter, the dispensing station and the removal station were in the same vertical position and overlapped in plan view. With one crane, the ladle containing the molten iron was placed in the dispensing station. If the other crane tries to load another ladle into the dispensing station with the other crane while it is being lifted upward, the two cranes will encounter each other. On the other hand, when one crane waits for the ladle that is discharging the hot metal in the sky, if it tries to remove the ladle suspended by the other crane, the crane will come to the same place. It becomes a mating state.

Therefore, as in this technical means, the payout station and the removal station are provided adjacent to each other in the moving direction of the crane or separated by one or more cranes so that there is no overlapping portion. When handling crane ladle to allow placement, it is possible to prevent the difference in-crane at dispensing station or Jokasu station. Thereby, the distribution of the ladle is performed very efficiently, and the hot metal supply to the converter can be efficiently performed.
In other words, by providing the dispensing station and the removal station at different positions in the direction of crane movement, the removal station acts as a crane refuge (evacuation station) when viewed from the dispensing station. When viewed from the station, the payout station works as a crane shelter.

Preferably, the converter equipment is provided with two discharge stations adjacent to each other in the moving direction of the crane, and a stripping station is provided on each side of the discharging station in the moving direction.
By doing this, we can prepare two sets of equipment configuration in which a removal station is provided next to the payout station, so that more ladles can be routed in situations that do not cause crane engagement. Thus, the hot metal supply to the converter can be efficiently performed.

Further, the technical means for solving the problems in the present invention is that the converter equipment has a standby station for performing ladle repair and bullion collecting work, and is set in any one of claims 1 to 3 After operating the number of ladles +1 operated, the crane is operated so as to place any one of the ladles at the standby station.
As described above, the number of ladle operations increases, so that the traveling time per ladle is extended, and metal and slag are deposited on the slag line of the ladle. Therefore, in order to perform the converter operation smoothly in response to this, it is preferable to further increase the number of ladles in operation and provide a standby station for placing the increased ladle. With regard to the ladle placed at the standby station, by removing the bullion and slag regularly, it is possible to ensure a stable ladle that does not adhere to the bullion and slag. become able to.

  ADVANTAGE OF THE INVENTION According to this invention, hot metal supply to a converter can be efficiently performed with a converter equipment.

Hereinafter, an embodiment of a hot metal supply method to a converter according to the present invention will be described with reference to the drawings.
FIG. 1 shows an outline when the converter equipment 1 is viewed from the front, and FIG. 2 shows a schematic plan view of the converter equipment 1.
As shown in FIG. 1, the converter facility 1 of the present embodiment conveys the three converters 2, a ladle 3 (hot metal ladle) that supplies hot metal to these converters 2, and the ladle 3. And two cranes 4. Furthermore, two “dispensing stations 6 (dispensing pits)”, which are places where the hot metal is transferred from the kneading wheel 5 to the ladle 3 after the ladle 3 is placed, are provided. There are also two removal stations 9 which are transferred from the dispensing station 6 and discharge the slag in the ladle 3.

In the converter 1, the present invention sets the number of ladle operations 3 to “the number of payout stations + 1”, and sets the payout station 6 and the removal station 9 adjacent to each other in the moving direction of the crane 4 or one crane. The ladle 4 is provided apart from the above, and the ladle 4 is handled by a crane so that it can be simultaneously placed on the dispensing station 6 and the removal station 9.
Hereinafter, the details of the converter facility 1 according to the present embodiment will be described.
A traveling rail 7 is provided on the upper side of the converter facility 1 so as to run through the converter facility 1, and two cranes 4 described later travel on the traveling rail 7. . The payout stations 6A and 6B are provided on one side of the traveling rail 7 (left side in FIG. 2) so as to be aligned in the direction of the traveling rail 7, and 3 on the other side of the traveling rail 7 (right side in FIG. 2). The basic converters (converter 2A to converter 2C) are arranged in the direction of the traveling rail 7. Note that the vertical direction in the following description is the same as the vertical direction in FIG.

As shown in FIG. 2, for the convenience of explanation, the traveling rail 7 is divided into seven sections. Dispensing stations 6A and 6B are provided so as to correspond to the lower side of the traveling rail 7 corresponding to the partition numbers 1 and 2, and below the traveling rail 7 corresponding to the partition numbers 4, 5, and 6. In addition, converters 2A, 2B, and 2C are provided on the side of the traveling rail 7. The crane 4A moves from the partition numbers 0 to 6, and the crane 4B moves from the partition numbers 1 to 7. One delimiter number corresponds to the width of one crane.
In addition, at the position of the partition number 0 and above the payout station 6A, the “scraping station 9A” is a place where the slag floating on the upper surface of the hot metal in the ladle 3 is scraped out by the sword 8A (slag dragger). Is provided. Similarly, a throat oyster 8B is arranged at the position of the delimiter number 3 to form a removal station 9B.

That is, two payout stations 6 that are adjacent to each other in the moving direction of the crane 4 are provided, and the removal stations 9 are provided on both sides in the moving direction of the payout stations 6, respectively. Two cranes 4A and 4B can exist simultaneously.
On the traveling rail 7, two cranes 4A and 4B are provided. Specifically, the crane body 10 travels on the traveling rail 7, and a suspended rope 11 (wire) extends downward from the crane body 10, and the tip of the suspended rope 11 The ladle 3 is suspended by a hook 12 provided on the top. The ladle 3 is lifted upward by winding the suspended rope 11 around the crane body 10, and the ladle 3 is paid out when the crane body 10 travels on the traveling rail 7. It is freely transferred between the station 6 and the converter 2.

The outline of ladle movement in the converter 1 is as follows.
First, after the kneading wheel 5 arrives at the converter 1, hot metal is poured from the kneading wheel 5 into the ladle 3 placed on the payout stations 6 </ b> A and 6 </ b> B. The ladle 3 charged with hot metal is lifted up by the cranes 4A and 4B, moved to the removal stations 9A and 9B above the discharge stations 6A and 6B and adjacent to the discharge stations 6A and 6B. 8B, the slag floating on the upper surface of the hot metal is scraped off.
The ladle 3 from which the slag has been scraped is transferred to one of the three converters 2A, 2B, 2C by the cranes 4A, 4B, tilting the converter 2, and tilting the ladle 3 The hot metal is charged into the converter 2.

In the converter 2 charged with hot metal, a lance is inserted from the furnace port of the converter 2 and brought close to the upper surface of the hot metal, and oxygen gas is sprayed. At the same time, refining is performed while stirring the hot metal with the blown gas from the furnace bottom (blowing). To start. At the same time, the slag forming and iron oxide Fe _x O _y or the like coolant such as lime CaO, i.e. the auxiliary raw material input. Phosphorus in the hot metal reacts with the charged oxygen and shifts to the slag phase, and starts laminating above the hot metal (dephosphorization). Furthermore, the carbon in the hot metal reacts with oxygen and CO. It is discharged as gas (decarburization). By this blowing process, molten steel having a predetermined phosphorus and carbon concentration can be obtained.

When the blowing process in the converter 2 starts, the empty ladle 3 is returned again to the discharge stations 6A and 6B by the cranes 4A and 4B, and the molten iron is again ready to be discharged.
FIG. 3 shows the movement of the cranes 4A and 4B and the movement of the cranes 4A and 4B when the total number of ladles 3 is three and the number of ladles 3 always disposed in the dispensing stations 6A and 6B. The Gantt chart which shows the movement (logistics) of the ladle 3 accompanying it in detail is shown.
FIG. 3A is a Gantt chart in the conventional converter facility 101 shown in FIG. In the conventional converter apparatus 101, the removal stations 109A and 109B are provided above the discharge stations 106A and 106B, and the discharge stations 106A and 106B and the removal stations 109A and 109B are the same in plan view. The point existing at the partition number position is greatly different from the present converter facility 1. In addition, in the conventional example, the operating number of ladles 103 is two.

Regarding the movement of the cranes 104A and 104B, first, the crane 104A grips the empty ladle 103 and installs it on the dispensing station 106A (pit A). Thereafter, hot metal is discharged from the kneading wheel 105 to the ladle 103, and component measurement and temperature measurement are performed. Then, the ladle 103 is suspended by the crane 104A, lifted upward, and transferred to the removal station 109A.
At this time, the ladle 103 that has been suspended by the crane 104B is arranged at the dehulling station 109B, and the slag in the ladle 103 is scraped out by the throat oyster 108B. Thereafter, the ladle 103 of the crane 104B is transferred to the position of the converter 102A, and the hot metal is charged into the converter 102A. After the hot metal charging is completed, the ladle 103 that has been emptied is transported and installed in the payout station 106B, and the hot metal discharge starts. At this time, the crane 104B is in a waiting state over the dispensing station 106B.

Under the situation where the hot metal discharge at the discharge station 106B has progressed to some extent, the removal of the ladle 103 suspended from the crane 104A is completed. The hot metal is charged into the converter 102B from the ladle 103. At this time, in order to smoothly move the crane 104A, the crane 104B is moved to the front of the converter 102C at the same time.
The ladle 103 that has been charged into the converter 102B is moved again to the position of the discharge station 106A by the crane 104A and installed, and one cycle of the crane 104A is completed.

At this time, the crane 104B that has been withdrawn before the converter 102C (separation number 6) moves to the upper side of the dispensing station 106B, and lifts the ladle 103 for which the component measurement and the temperature measurement are completed again. This completes one cycle of the crane 104B.
In the present embodiment, the ladle 103, the crane 104, and the payout station 106 always correspond to each other, and it is always the fixed crane 104 that holds a certain ladle 103, and the ladle 103 is always the same payout station. 106. It can be seen from FIG. 3A that the time required for one cycle of the crane 104, that is, the cycle time, is 33 minutes.

Considering the number of ladles that are always placed in the dispensing station 6, as can be seen from FIG. 3 (a), the number of ladles that are always placed is zero or one. There is an undeployed situation.
On the other hand, FIG. 3 (b) shows the movement of the crane 4 of this embodiment and the movement (distribution) of the three ladles 3 associated therewith.
Regarding the movement of the crane 4, the crane 4 </ b> A first installs the empty ladle 3 on the dispensing station 6 </ b> B. Thereafter, the ladle moves to the dispensing station 6A, and the ladle 3 in which the hot metal component measurement and the temperature measurement are completed is lifted up and transferred to the demolition station 9A. In this removal station 9A, the ladle 3 is in a suspended state, and the slag in the ladle 3 is scraped out by the throat oyster 8A.

At that time, the crane 4B is suspending another ladle 3, and the ladle 3 is disposed in the dehulling station 9B, and the slag is removed by the blade 8B. When such removal is completed, the crane 4B moves to the front of the converter 2A, and the hot metal is charged from the ladle 3 into the converter 2A. The ladle 3 that has been emptied after the hot metal charging is completed is transported and installed in the discharge station 6A while being suspended by the crane 4B, and the discharge of the hot metal starts.
The situation where the ladle 3 is installed at the dispensing station 6A is indicated by the P part in the Gantt chart, which means that the R ′ part in FIG. Looking at the situation of part P from another point of view, the removal station 9A and the payout station 6A are separated by one crane in plan view, so that the crane 4 can be located at both stations simultaneously. This means that the removal of the hot metal and the discharge of the hot metal are performed in parallel, and the hot metal supply process is efficiently advanced. Case C in FIG. 7 corresponds to this situation, and since the conventional crane (case A) has a cycle time of 33 minutes / time, the removal station 9A and the dispensing station 6A are separated from each other. The crane cycle is shortened to 29 minutes / time.

Thereafter, the crane 4B does not wait for the hot metal discharge of the ladle 3 in the payout station 6A to be completed, but hangs the ladle 3 in the adjacent payout station 6B filled with hot metal. Meanwhile, the crane 4A waits at the position of the demolition station 9A in order to wait for this lifting.
The crane 4B that lifts the ladle 3 of the payout station 6B is best if it moves to the removal station 9B as it is, but it is necessary to move the ladle 3 in the removal station 9A before the converter 2A. Therefore, it once moves to the front of the converter 2C (escapes).

  The crane 4A moves to the front of the converter 2B so as to follow the crane 4B, and the hot metal is charged into the converter 2B. The ladle 3 which has been emptied and is emptied is always installed in the dispensing station 6 (in this case, the dispensing station 6B) in which one ladle is empty, and the next hot metal is charged (Fig. 3 (b) Q part). Immediately thereafter, the crane 4 </ b> A hangs the ladle 3 after the completion of the hot metal charging disposed in the dispensing station 6 </ b> A without waiting for the hot metal charging to the ladle 3 to end. This completes one cycle of the crane 4B. In the case of the present embodiment, it can be seen that the time (cycle time) required for one cycle of the crane 4 is 29 minutes from FIG. The crane 4B that had escaped before the converter 2B (separation number 5) moved to the removal station 9B adjacent to the crane 4A when the crane 4A moved to the discharge station 6B. To do.

As described above, the dispensing station 6 and the removal station 9 are provided adjacent to each other in the moving direction of the crane 4, and the ladle 3 is disposed so as to enable simultaneous placement on the dispensing station 6 and the removal station 9. When handling with a crane, the ladle 3 is set at the removal station 9 with one crane 4A or 4B, and the other ladle 3 is placed at the discharge station 6 with the other crane 4B or 4A in parallel. Will be able to. Thereby, the distribution of the ladle 3 is performed very efficiently, and the hot metal supply to the converter 2 can be performed efficiently.

In addition, in this embodiment, in order to further reduce the cycle time of the crane 4, the converter facility 1 is provided with a standby station 13 for repairing the ladle 3 and collecting metal.
In addition, a crane is prepared so that one ladle 3 is prepared separately from the number of ladles 3 in operation, and both of them are operated together, and any one of the ladles 3 is arranged at the standby station 13. 4 is operated. In the ladle 3 arranged in the standby station 13, metal and slag adhering to the ladle 3 are periodically removed.

  That is, in order to improve the hot metal supply capability to the converter 2, it is preferable to increase the number of ladles 3 that supply hot metal. However, by increasing the number of operating ladle 3, the circulation time per ladle is extended, and metal and slag are deposited on the slag line of ladle 3. Therefore, in order to smoothly operate the converter operation in response to this, it is preferable to further increase the number of ladles 3 in operation and provide a standby station 13 on which the increased ladle 3 is placed. . With regard to the ladle 3 placed at the standby station 13, the bullion and slag are periodically removed, so that the ladles 3 that can be used stably without any bullion or slag are reliably secured. Will be able to.

  However, the ladle 3 in the standby station 13 is an empty ladle that has not received hot metal inside. If the state of the empty pan continues for a long time, the temperature of the refractory inside the ladle 3 decreases, When the hot metal is subjected to hot metal, metal adhesion will occur and stable operation will become difficult. ”“ Heat loss will increase and the temperature of the hot metal charged into the converter 2 will decrease. ”“ Refractory material will be charged. Inconveniences such as “thermal expansion and peeling due to hot metal” occur. Therefore, in the case of the present embodiment, by inserting a burner or the like into the ladle 3 in the standby station 13 and generating a flame, the ladle 3 is heated after taking the bullion and the above problem occurs. I try to prevent it.

Case D in Fig. 7 corresponds to this situation. In this case, the number of ladles is set to the number of payout pits + 1, and another ladle is used, for a total of 4 ladles. ing.
4 and 5 show a second embodiment of the converter facility.
The converter equipment 1 has a desulfurization station 14A and a desulfurization station 14B, and the desulfurization station 14A and the desulfurization station 14B are respectively arranged on the side of the traveling rail 7 at the positions 1 and 2 of the traveling rail 7. Has been. In addition, the front blades are arranged at the position of the partition number 0 to form the removal station 9, and two converters 2A and 2B are provided. Other configurations are substantially the same as those of the first embodiment.

  The ladle 3 is moved in the converter facility 1 after the kneading vehicle 5 arrives at the converter facility 1 and then from the kneading vehicle 5 to the ladle 3 placed on the dispensing stations 6A and 6B. Is poured. The ladle 3 charged with hot metal is transferred to the desulfurization stations 14A and 14B, and by adding auxiliary materials such as CaO to the hot metal at the desulfurization station 14, the sulfur S in the hot metal is transferred to the slag layer. The sulfur component (S) in the hot metal is predetermined. In each of the desulfurization stations 14A and 14B, throat oysters 8A and 8B for scraping out the slag generated by the desulfurization process are installed, and the generated slag is scraped out.

The ladle 3 in which the hot metal after the desulfurization treatment is charged is transferred by the cranes 4A and 4B to any one of the converters 2A and 2B, and the converter 2 is tilted and the ladle 3 is tilted. Then, the hot metal is discharged into the converter 2.
In the present embodiment, the ladle 3 is handled by the cranes 4A and 4B so that the number of ladles 3 always disposed in the desulfurization stations 14A and 14B is equal to or greater than “total number of desulfurization stations −1”. Yes. In other words, the idea for using the crane 4 most efficiently applied to the dispensing station 6 is applied to the desulfurization station 14.

  Specifically, one ladle 3 is always arranged at one of the two desulfurization stations 14A or 14B (the number of desulfurization stations is −1 = 2-1 = 1). It is assumed that it is being done. At the same time, the other desulfurization station 14B or 14A is always empty. Therefore, since the cranes 4A and 4B can immediately hold the ladle 3 adjacent to the ladle 14B or 14A after installing the ladle 3 in either the desulfurization station 14A or 14B, the logistics of the ladle 3 It is performed very efficiently, and the hot metal supply to the converter 2 can be performed efficiently.

FIG. 6 shows a Gantt chart corresponding to the desulfurization process of the converter facility 1 described above. The operating number of ladle 3 is three.
In this Gantt chart, for example, paying attention to part P, the crane 4A moves to the dispensing station 6A immediately after placing the ladle 3 charged with hot metal in the desulfurization station 14B, without waiting, and dispenses. The ladle 3 that is finished is hung.
Further, paying attention to the portion Q, the crane 4B hangs the ladle 3 where the roasting 8 of the desulfurization station 14B has ended immediately after installing the empty ladle 3 in the dispensing station 6B. Paying attention to the R portion, the crane 4B lifts the ladle 3 after the completion of the desulfurization treatment in the desulfurization station 14A immediately after the empty ladle 3 is installed in the discharge station 6B.

  On the other hand, paying attention to the S part and the T part of the Gantt chart, the number of operating ladles 3 is also set to “number of payout stations + 1 = 2 + 1 = 3”, so the first ladle 3 is placed in the desulfurization station 14A. When the molten iron is disposed and the hot metal is being processed from the second ladle 3 to the converter 2, it is removed from the third ladle 3 by the front blade 8F.滓 Processing is performed. Thus, since the three ladles 3 are operating in parallel, the hot metal can be supplied to the converter 2 very efficiently. Case B in FIG. 7 corresponds to this situation, and three ladles are used with the number of ladles as the number of payout pits + 1. As a result, the crane cycle is shortened to 31 minutes / time while the conventional (case A) cycle time is 33 minutes / time.

Also in the present desulfurization treatment, as with the first embodiment, the payout station 6 and the debonding station 9 are provided adjacent to each other in the moving direction of the crane 4 or separated by one or more cranes. The ladle 3 is handled by the crane 4 so that it can be placed simultaneously. Specifically, as shown in FIG. 4, a front blade 8F is arranged at a position of a partition number 0 adjacent to the payout station 6A (separation number 1), and two ladles are used as both the stations 6A and 9 as a dehulling station 9. The hot metal is discharged and removed at the same time. Even if performed at the same time, the dispensation station 6A and the removal station 9 do not overlap with each other in plan view, so that the crane 4 does not come into contact.

In addition, the hot metal supply method to the converter of this invention is not limited to the said embodiment.
That is, as in the first embodiment, the discharge station 6B and the removal station 4B are not disposed adjacent to each other, but the converter is disposed at the partition numbers 5, 6, and 7, and the removal station 6B is removed. A station 4B may be provided, and a space for one crane may be provided between the payout station 6B and the removal station 4B.
Further, the converter may be any one of a top blow converter, a bottom blow converter, and a top bottom converter, and a converter that performs a so-called double slag method in which dephosphorization and decarburization are performed in one converter. It can also be applied to furnace facilities.

  Further, in the present embodiment, the converter facility 1 in which the payout station 6B and the removal station 4B are arranged adjacently has been described as an example, but the number of ladle operations 3 is “the number of payout stations + 1”. The technique in which the ladle 3 is handled by the crane 4 and the hot metal is supplied to the converter 2 can be applied to conventional converter facilities in which the dispensing station 6B and the removal station 4B are in the same position in plan view. It is.

It is a front schematic diagram of the converter equipment concerning a 1st embodiment. It is a plane schematic diagram of the converter equipment concerning a 1st embodiment. It is the Gantt chart in the converter equipment concerning 1st Embodiment, (a) is a prior art example, (b) is a thing of 1st Embodiment. It is a plane schematic diagram of the converter equipment concerning a 2nd embodiment. It is a plane schematic diagram of the converter equipment concerning a 2nd embodiment. It is a part of desulfurization process Gantt chart in the converter equipment of 2nd Embodiment. It is the figure by which the operation performance in each embodiment was shown. It is the plane schematic of the converter equipment in a prior art example.

Explanation of symbols

1 Converter facilities 2 Converters (2A-2C)
3 Ladle 4 Crane (4A, 4B)
5 Chaos vehicle 6 Dispensing station (6A, 6B)
9 Removal station (9A, 9B)
14 Desulfurization station (14A, 14B)

Claims (4)

And converter, a ladle for charging a molten iron into the converter, a payout station molten iron payout to the ladle is made from torpedo car, a ladle to carry in or out of the ladle for the dispensing station A converter with a crane to handle,
A hot metal supply method to a converter, wherein the ladle operation number is set to “the number of payout stations + 1”, the ladle is handled by a crane, and hot metal is supplied to the converter. The converter equipment has a removal station where the slag in the ladle is discharged, and the crane handles the ladle to carry the ladle into and out of the dispensing station and the removal station. The dispensation station and the removal station are provided adjacent to each other in the moving direction of the crane or separated by one or more cranes, and the ladle that enables simultaneous placement on the dispensation station and the removal station is handled by the crane. The hot metal supply method to the converter of Claim 1 characterized by these.   The converter apparatus is provided with two discharge stations adjacent to each other in the moving direction of the crane, and an unloading station is provided on each side of the discharging station in the moving direction. The hot metal supply method to the converter as described in 2.   The converter equipment has a standby station for repairing the ladle and collecting the bullion, and the number of ladles set in any one of claims 1 to 3 is operated. A method for supplying hot metal to a converter, comprising operating a crane so as to place any one of the ladle at the standby station.

Images