JP4651598B2 - Falling object collection method for converter equipment - Google Patents

Description

  The present invention relates to a falling object collection method for converter facilities.

In recent years, in hot metal refining, one of a plurality of converters is used as a dephosphorization furnace and the other one is used as a decarburization furnace. A refining method is also employed in which hot metal after dephosphorization treatment is charged into a decarburization furnace and blown.
In a converter facility that employs this type of refining method, the ladle that receives the molten metal is a crane or dephosphorization machine that moves between the discharge station that receives the molten metal conveyed from the blast furnace facility and the dephosphorization furnace or decarburization furnace. It is transported by a carriage that reciprocates under the furnace or under the decarburization furnace.
By the way, due to the reaction of the molten metal in the converter, the slag, metal, dust, etc. in the furnace may fall as a fallen object from the furnace port toward the furnace bottom and its surroundings. In particular, the hot metal reaction in the dephosphorization furnace is intense, and a large amount of forming slag is spouted from the furnace port (spitting) by the reaction, so that a large amount of fallen objects accumulates in and around the dephosphorization furnace. To do. In addition, the above-mentioned bullion etc. also adheres to the furnace opening, and the dip metal attached to the furnace opening may fall under the furnace by its own weight by tilting the dephosphorization furnace for charging and discharging molten metal. . Such fallen objects may hinder the movement of the carriage, so it is necessary to remove them with heavy equipment such as excavators in the middle of the operation, but this may cause the operation to stagnate. bad.

In order to solve such a problem, in Patent Document 1, a scraper is provided in the front part of the carriage that moves from the bottom of the converter to the saddle receiving position, and the fallen object that has fallen on the movement path of the carriage is accompanied by the movement of the carriage. In addition, a falling object processing apparatus that collects and processes by a scraper is disclosed.
Patent No. 2922202

However, as shown in Patent Document 1, simply installing a scraper on a carriage and collecting the fallen objects by moving the carriage is the same as removing fallen objects with a heavy machine such as an excavator as described above. Therefore, there is a risk of hindering the operation of the converter.
Therefore, an object of the present invention is to provide a falling object collection method for converter equipment that can collect falling objects smoothly in accordance with the operation of the converter without causing any trouble in the operation of the converter. It is a thing.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problem in the present invention is that a converter and a ladle can be mounted, and the forward side is moved from the hot water side to the charging side under the converter, and the reverse side is moved from the hot water side to the charging side. In the method for collecting fallen objects of the converter equipment that collects fallen objects that fall under the converter during operation of the converter, the carriage equipped with the empty ladle is mounted. When moving backward from the entry side to the discharge side, the falling object is gathered to the discharge side by a scraper provided at the rear of the carriage, and the molten metal is poured into an empty ladle located on the discharge side, and then the carriage When the water is advanced from the hot water side to the charging side, the falling objects are gathered to the charging side by a scraper provided at the front part of the carriage.

According to this, in the operation of the converter, in order to discharge the molten metal processed in the converter from the converter, it is necessary to carry an empty ladle on the carriage and transport it from the charging side to the outlet side, Falling objects under the converter can be collected and collected by moving the carriage (reversing) accompanying the operation of the converter. Also, in the operation of the converter, it is necessary to transport the molten metal discharged from the empty ladle to the charging side after tapping, but the bottom of the converter is moved along with the movement (advance) of the cart accompanying the operation of the converter. You can collect and collect falling objects.
Therefore, falling objects can be collected smoothly in accordance with the operation of the converter, and there is no possibility that the operation of the converter will be hindered by the collection of falling objects.

It is preferable that the reverse movement of the cart is performed during the period from blowing to before the hot water, and the forward movement of the cart is performed after the hot water.
According to this, the fallen objects that have fallen under the converter during blowing can be collected as the carriage moves backward, and the fallen objects that have fallen under the converter from during blowing to after hot water are removed from the carriage. Can be collected with advance.
The falling objects gathered on the charging side are accommodated in a charging side pit provided on the charging side, and the falling objects gathered on the tapping side are accommodated in a tapping side pit provided on the tapping side. preferable.

  According to this, it is possible to efficiently collect the fallen objects gathered on the charging side and the fallen objects gathered on the hot water side.

  According to the present invention, there is no risk of hindering the operation of the converter, and falling objects can be collected smoothly in accordance with the operation of the converter.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIGS. 1-6 has shown the converter equipment by which the falling object collection method of the converter equipment of this invention is employ | adopted. First, the converter equipment will be described.
As shown in FIGS. 1 to 6, the converter equipment 1 is transported to a converter equipment 1 from a plurality (three in this embodiment) of converters 21, 22, and 23 and a blast furnace equipment (not shown). A pretreatment facility 3 for preliminarily treating the molten iron, a scrap yard 4 for storing scraps to be inserted into the converters 21, 22, and 23 together with the molten iron, and moving between the facilities to convey the molten metal and scrap. A crane device 5 and a cart device 6 are provided.

Three converters 21, 22, and 23 are provided side by side, and the first converter 21 provided closest to the pretreatment facility 3 side (upstream side) is a converter that performs a dephosphorization process, The second converter 22 provided adjacent to the converter 21 that performs the dephosphorization process is a dual-purpose furnace that performs a dephosphorization process or a decarburization furnace, and the second converter 22 provided adjacent to the dual-purpose furnace 22. The converter 23 of 3 is a converter which performs a decarburization process.
These three converters 21, 22, and 23 are normally dephosphorized in the first converter 21 and decarburized in the second converter 22. When repairing the first converter 21, dephosphorization processing is performed in the second converter 22, and decarburization processing is performed in the third converter 23. Further, when repairing the second converter 22, dephosphorization processing is performed in the first converter 21, and decarburization processing is performed in the third converter 23.

In the following, for convenience of explanation, it is assumed that the dephosphorization process is performed in the first converter 21 and the decarburization process is performed in the second converter 22, and the first converter 21 is removed. The dephosphorization furnace P that performs the phosphorus treatment is referred to as the second converter 2 and the decarburization furnace C that performs the decarburization treatment. It is assumed that the third converter 23 is being repaired, and is referred to as a spare converter Y.
Further, the dephosphorization treatment in the dephosphorization furnace P needs to form a certain amount of forming slag with respect to the hot metal, and a part of the forming slag is less likely to be ejected from the furnace port to the outside of the furnace due to extremely intense reaction in the furnace. Absent. In addition, ingots, dust, and the like are ejected from the furnace port together with the slag, and a large amount of the slag, ingots, dust, etc. falls and accumulates in and around the furnace. In addition, the bullion or the like also adheres to the furnace opening, and the bullion or the like falls to the furnace bottom and its surroundings by its own weight when the dephosphorization furnace P is tilted. Hereinafter, the objects that fall from the dephosphorization furnace P to the bottom of the furnace and around the dephosphorization process in the dephosphorization furnace P are collectively referred to as falling objects.

Further, these three converters 21, 22, and 23 are pivotally supported so as to be tilted and tilted to one side to be charged with the molten metal, and tilted to the other to discharge the treated molten metal. Hereinafter, the side in which the molten metal is charged into these three converters 21, 22, and 23 is referred to as a charging side, and the side from which the hot water is discharged is referred to as a tapping side.
The crane apparatus 5 is provided on the charging side for charging molten metal into the converters 21, 22, 23, and includes a crane line 51 that extends linearly along the three converters 21, 22, 23, and 3 Basic cranes 52, 53, 54.

Further, the pretreatment facility 3 is provided at one end of the crane line 51, and the scrap yard 4 is provided at the other end of the crane line 51.
Among the three cranes, the first hot metal transport crane 52, the second hot metal transport crane 53, and the scrap transport crane 54 from the side of the pretreatment facility 3, and the hot metal transport cranes 52 and 53 are used to feed molten metal such as hot metal or molten steel. The ladle 8 to be accommodated is transported, and the scrap transport crane 54 transports a scrap chute 9 on which scrap can be loaded.
A hot metal transfer rail 10 is laid between the pretreatment facility 3 and the blast furnace facility. On the hot metal transport rail 10, a kneading wheel 11 is reciprocated between the blast furnace equipment and the converter equipment 1, and the hot metal is transferred from the blast furnace equipment to the converter equipment 1 by the kneading car 11. The

In the preliminary processing equipment 3, a first processing station 31 and a second processing station 32 that perform preliminary processing on hot metal are arranged in parallel with each other.
The first treatment station 31 removes the hot metal in the kneading vehicle 11 to the discharge pit 33 for discharging the molten iron to the ladle 8, the desulfurization equipment 34 for desulfurizing the molten iron discharged to the ladle 8, and the slag of the molten iron. And a removal equipment 35 for carrying out the operation.
The payout pit 33 is provided at a position lower than the hot metal transport rail 10. The delivery pit 33 is provided with a transport carriage 36 on which the ladle 8 can be placed so as to be reciprocally movable from below the hot metal transport rail 10 to below the crane line 51.

The desulfurization equipment 34 is provided on the upper side of the payout pit 33 and includes a transport table 37 on which the ladle 8 can be placed. The demolition equipment 35 includes a sword (slag dragger) 38 that scrapes off the slag floating on the upper surface of the hot metal in the ladle 8 on the side of the transport table 37. In the present embodiment, the second processing station 32 has the same structure as that of the first processing station 31, and therefore the description thereof is omitted here.
The scrap yard 4 includes a chute placement site 41 for placing the scrap chute 9 below the crane line 51, and a scrap pit 42 that temporarily stores scrap at a position outside the crane line 51. It has. Further, between the chute placement site 41 and the scrap pit 42, a transport carriage 43 for placing and transporting the scrap chute 9 is disposed between the chute placement site 41 and the scrap pit 42 so as to be movable.

Further, in the scrap pit 42, a lifting magnet 44 for loading the scrap onto the scrap chute 9 conveyed to the scrap yard 42 is movably disposed.
The crane line 51 is provided with a retreat space for retracting the crane between the pretreatment facility 3 and the plurality of converters 2. By retracting the second hot metal transport crane 53 in the retreat space, the scrap transport crane 54 can be made to face the dephosphorization furnace P.

The bogie device 6 includes a first bogie transport line 61 extending from the charging side of the dephosphorization furnace P to the hot water outlet side through the lower side of the dephosphorization furnace P, and the decarburization furnace from the charging side of the decarburization furnace C. A second carriage transport line 62 that passes below C and extends to the outlet side, a third carriage transport line 63 that extends from below the spare converter Y to the exit side, and each carriage transport line 61, 62, 63 And a movable carriage 64.
Further, as shown in FIGS. 5 and 6, the first carriage transport line 61 is laid on the pair of traveling rails 66, a path 67 recessed between the pair of traveling rails 66, and the path 67. A pair of rails 68 are provided. The pair of traveling rails 66 has one end on the charging side, passes under the dephosphorization furnace P, extends to the hot water side, and is connected to traveling rails extending to a secondary refining facility (not shown).

Since the second converter 22 is a dual-purpose furnace as described above, the second carriage transport line 62 has the same configuration as the first carriage transport line 61. The third carriage transport line 63 includes a pair of travel rails 66 extending from the lower side of the third converter 2 to the hot water discharge side, and a path 67 recessed between the pair of travel rails 66.
As shown in FIGS. 3 to 5, the carriage 64 includes a vehicle body 72 including a mounting seat 71 on which the ladle 8 is mounted, and wheels 73 that are supported by the vehicle body 72 and roll on the traveling rail 66. I have.
In addition, although the trolley | bogie 64 reciprocates between the hot water side and the charging side, it is assumed here that going from the hot water side to the charging side "moves forward" and goes from the charging side to the hot water side. Is referred to as “reverse”, and the end that becomes the head when moving forward is called the front end, and the end that becomes the head when moving backward is called the rear end.

A scraper device 80 that collects falling objects from the dephosphorization furnace P is disposed on the carriage 64 provided on the first carriage conveyance line 61.
The scraper device 80 includes a scraper 81 (hereinafter also referred to as a first scraper) that collects falling objects falling on the lane from the dephosphorization furnace P as the carriage 64 advances, and a dephosphorization furnace P. A scraper 82 (hereinafter sometimes referred to as a second scraper) that collects falling objects falling on the lane as the carriage 64 moves backward is provided.
The first scraper 81 is provided at the front end portion of the vehicle body 72 of the carriage 64, and is attached to a pair of main bodies 83 provided from one side of the front end portion to the center, and an outer portion of the main body 83. And a pair of wings 84 projecting outward from the carriage 64. Further, as shown in FIG. 5, the lower end portion of the main body 83 includes notches 83 a at positions facing the pair of running rails 66 and the pair of rails 68, and a plurality of obstacle plates 85 are attached. The obstacle plate 85 is also provided at the lower ends of the pair of wings 84.

As shown in FIG. 4, the width of the first scraper 81 is larger than the distance between the pair of traveling rails 66, and thus the first scraper 81 is deposited not only between the pair of traveling rails 66 but also outside the pair of traveling rails 66. Falling objects can also be processed by the first scraper 81.
Further, the first scraper 81 is attached to the carriage 64 via the attitude changing means 86.
As shown in FIG. 3, the posture changing means 86 includes a hinge mechanism 87 that pivotally supports the main body 83, and a swing mechanism 88 that swings the main body 83 about the pivot axis of the hinge mechanism 87. The swing mechanism 88 includes a hydraulic cylinder, a link mechanism that connects the hydraulic cylinder and the main body 83, and the main body 83 swings by controlling the hydraulic cylinder. Thus, the first scraper 81 has a gathering posture in which the lower end portion of the obstacle plate 85 is positioned below the upper surface of the traveling rail 66 and collects falling objects, and the lower end portion of the obstacle plate 85 is disposed on the traveling rail. It is possible to change the posture of the first scraper 81 between the raised posture positioned above the upper surface of 66.

Since the second scraper 82 has the same configuration as the first scraper 81 except that it is disposed at the rear end of the vehicle body 72, the same reference numeral as that of the first scraper 81 is assigned and description thereof is omitted.
By setting the scrapers 81 and 82 to the gathering posture, the falling objects can be pushed by the obstacle plate 85 and collected. Further, when it is necessary to move the carriage 64 without the falling object processing work by the scraper device 80, such as when it is necessary to move the carriage 64 at a higher speed than usual, the scrapers 81 and 82 are set in the ascending posture. Thus, the carriage 64 can be moved without bringing the obstacle plate 85 into contact with the falling object.

In addition, the trolley | bogie 64 arrange | positioned on the 2nd trolley | bogie conveyance line 62 and the 3rd trolley | bogie conveyance line 63 also has the same structure.
Further, as shown in FIG. 2 or FIG. 6, the first carriage transport line 61 includes a pit 90 that accommodates fallen objects collected by the scraper device 80.
The pit 90 includes a hot water side pit 91 provided on the hot water side and a charging side pit 92 provided on the charging side.
The hot water side pit 91 is recessed between the pair of running rails 66 at a position behind the cart 64 in a state where the cart 64 is moved to a position where the hot water discharged from the dephosphorization furnace P is received. Further, the hot water side pit 91 includes a planar pit bottom portion 91a and a ramp 91b that moves upward as the distance from the converter 2 increases from the pit bottom portion 91a. Thereby, it is possible to carry in a heavy machine M such as an excavator for taking out fallen objects accommodated in the pit bottom portion 91a without passing below the dephosphorization furnace P. Moreover, even when the molten metal leaks from the ladle 8 due to unforeseen circumstances, the hot water side pit 91 has a capacity capable of accommodating all of the molten metal. In view of this point, it is preferable that the path 67 has a slight downward slope from the dephosphorization furnace P toward the hot water side pit 91.

  The charging side pit 92 is provided at a position in front of the carriage 64 in a state where the carriage 64 is moved to a position where the ladle 8 on the carriage 64 can be lifted by the hot metal transport crane. The charging-side pit 92 is recessed in the direction away from the traveling rail 66 with one end of each traveling rail 66 as a base point, and extends upward from the bottom of the pit as the distance from the dephosphorization furnace P increases. A ramp 92b is provided. Note that the charging side pit 91 may have a configuration in which the bottom of the pit is formed in a planar shape and the ramp 92b is connected to the bottom of the pit as in the case of the hot water side pit 91.

Further, the pair of rails 68 is for a carriage that transports the slag discharged from the converters 21, 22, and 23, and is disposed between the charging side pit 92 and the hot water side pit 91. In addition, the 2nd trolley | bogie conveyance line 62 is also provided with the pit 90 similar to the 1st trolley | bogie conveyance line 61. FIG.
Hereinafter, for convenience of explanation, the crane line 51 is divided into 8 sections (0 to 7 sections) and a section (S section) provided with the chute placement site 41 of the scrap yard 4, and the arrangement of each equipment is shown in FIG. Will be explained.
The first hot metal transport crane 52 can move on the crane line 51 from the 0th ward to the 6th ward, and the second hot metal transport crane 53 can move on the crane line 51 from the 1st ward to the 7th ward. Moreover, the scrap transport crane 54 can move on the crane line 51 from the 4th district to the Sth district.

In addition, the first processing station 31 of the preliminary processing facility 3 is disposed in the first section, and the second processing station 32 is disposed in the second section. In these first and second processing stations 31 and 32, a payout pit 33 is arranged under the crane line 51, and a transport table 37 is arranged at a position not overlapping the payout pit 33.
Moreover, the converters 21-23 are arrange | positioned side by side in the position corresponding to 4 wards, 5 wards, and 6 wards, respectively. Section 3 is a retreat space provided between the second processing station 32 and the dephosphorization furnace P.

As described above, according to the converter facility 1 of the present invention, when the kneading vehicle 11 arrives at the converter device 1 from the blast furnace, the molten iron in the kneading vehicle 11 is discharged to the ladle 8 in the discharge pit 33. The hot metal discharged to the ladle 8 is desulfurized by the desulfurization apparatus 10 and then the slag is removed by the demolition apparatus 11.
As shown in FIG. 7 (a), the ladle 8 containing the hot metal from which the slag has been removed is placed in front of the dephosphorization furnace P by the first hot metal transfer crane 52 or the second hot metal transfer crane 53, that is, charged. It is conveyed to the side. Thereafter, the dephosphorization furnace P is tilted to the charging side, the hot metal in the ladle 8 is charged into the dephosphorization furnace P, and the hot metal is dephosphorized. When the dephosphorization furnace P is tilted to the charging side, the metal or the like adhering to the furnace port falls around the dephosphorization furnace P.

As shown in FIG. 7B, during the dephosphorization process (for example, during dephosphorization blowing), the carriage 64 on which the empty ladle 8 is mounted moves backward from the charging side toward the hot water side. When the carriage 64 moves backward from the charging side toward the hot water side, the fallen object L below the dephosphorization furnace P is gathered to the hot water side by the second scraper 82 provided at the rear part of the carriage 64.
As shown in FIG. 7 (c), the carriage 64 on which the empty ladle 8 is mounted stops at the pouring position. At this time, the fallen object L gathered to the pouring side is provided on the pouring side by the second scraper 82. It is dropped in the hot spring side pit 91. Note that when the carriage 64 stops at the pouring position, the tip of the second scraper 82 reaches the pouring pit 91.

In addition, after the carriage 64 stops at the pouring position, the hot metal after the dephosphorization process is poured out into the empty ladle 8. After the hot metal pouring is completed, the carriage 64 transfers the hot metal after the dephosphorization process to the decarburization furnace 2B. 2 The hot metal transport crane 53 moves to the crane line 51 side on which it moves.
As shown in FIG. 7 (d), when the molten metal is poured into the empty ladle 8 located on the outlet side, and then the carriage 64 is advanced from the outlet side to the charging side, it is provided at the front part of the carriage 64. The fallen objects L below the dephosphorization furnace P are gathered to the charging side by the first scraper 81 thus formed.

The carriage 64 moving toward the charging side stops below the crane line 51, and at this time, the fallen object L gathered and collected on the charging side is provided on the charging side by the first scraper 81. It is dropped in the charging side pit 92. Note that when the carriage 64 stops at the pouring position, the tip of the first scraper 81 reaches the charging side pit 92.
Therefore, according to the falling object collection method of the converter facility 1, the falling object L can be collected smoothly according to the operation of the converter.
The operation method of the converter equipment 1 of this embodiment is demonstrated along the Gantt chart shown to Fig.8 (a).

The Gantt chart in FIG. 8A shows the steps (processes) developed in the dephosphorization furnace P, the decarburization furnace C, and the scrap yard 4 in a time series every minute, and the time required for each process is shown. Shown in the bar.
Further, the broken line L1 indicates the movement of the first hot metal transfer crane 52, the broken line L2 indicates the movement of the second hot metal transfer crane 53, the broken line L3 indicates the movement of the scrap transfer crane 54, and the broken line L4 is below the dephosphorization furnace P. The movement of the carriage 64 passing through is shown.
Also, the hot metal is transported to the converter equipment 1, a mixture of the hot metal and scrap is subjected to a dephosphorization process and a decarburization process to form molten steel, and the process of transporting the hot metal from the converter equipment 1 is one step. In this embodiment, the Nth process is the current process, and the process before the current process is the previous process.

The operation of the converter 1 is followed from time A. At the time point A, the second hot metal transport crane 53 is retracted to the third section and the scrap transport crane 54 is set to 4 in order to insert the scrap into the dephosphorization furnace P which has been emptied after the waste treatment in the previous process. The scrap transport crane 54 charges the dephosphorization furnace P with scrap. At this time, the carriage 64 on which the ladle 8 containing the hot metal from the previous process is moved (moved forward) from the hot water side to the charging side, that is, the fourth section.
And before moving to the time point B, the scrap transport crane 54 is returned to the S section, and the second hot metal transport crane 53 is moved to the fifth section before the decarburization furnace C, and preliminary processing is performed on the four sections that have become empty. The ladle 8 containing the finished hot metal is transported to the dephosphorization furnace P by the first hot metal transporting crane 52, and the hot metal is charged into the dephosphorization furnace P.

After the hot metal is charged into the dephosphorization furnace P, the first hot metal transport crane 52 is quickly moved from the 4th district to the 3rd district (any of the 0th district to the third district) to empty the 4th district. The second hot metal transport crane 53 is moved to the four sections.
At this time, the carriage 64 on which the ladle 8 containing the hot metal of the previous step is placed on standby is set in the 4th section, and the ladle 8 is lifted by the second hot metal transport crane 53. Then, the second hot metal transport crane 53 is moved from the 4th section to the 5th section, and the hot metal in the ladle 8 is charged into the decarburization furnace C.

When the ladle 8 is being lifted by the second hot metal transport crane 53, the dephosphorization process of the current process is started. The dephosphorization process takes about 8 minutes, during which a large amount of fallen matter L falls below and around the dephosphorization furnace P. In this manner, the fallen object L from the dephosphorization furnace P accumulates on the first carriage transport line 61 while the carriage 64 is waiting in the four sections on the charging side.
Then, while performing the dephosphorization process in the dephosphorization furnace P, the second hot metal transport crane 53 is moved, and the ladle 8 emptied by inserting the hot metal into the decarburization furnace C is again put into the fourth section. It is mounted on the mounting seat 71 of the cart 64 that is waiting (time C).

When the ladle 8 is being placed on the mounting seat 71 of the carriage 64, the dephosphorization furnace P has shifted from a dephosphorization process to a tempering process, and then proceeds to a tapping process. In order to shift the empty ladle 8 to the hot water side of the dephosphorization furnace P before moving to the pouring process, the carriage 64 is moved backward from the charging side to the hot water side (time point D).
While the carriage 64 is waiting on the charging side, a large amount of fallen objects L are accumulated on the first carriage transport line 61. These fallen objects L are second scraper 82 as the carriage 64 moves backward. Are gathered together and pushed to the hot spring side. Then, when the carriage 64 is moved to a position where the hot metal from the dephosphorization furnace P is received, these falling objects L are accommodated in the hot water side pit 91.

As described above, the fallen object L accumulated on the first carriage transport line 61 is scooped as the carriage 64 moves backward by the second scraper 82 attached to the rear end of the carriage 64. The movement of the carriage 64 is not hindered by L, and the carriage 64 can be moved from the charging side to the hot water outlet side within the scheduled time.
In addition, since the dephosphorization process and the tempering process are carried out while the carriage 64 is moving backward from the charging side to the hot water side or immediately after that, the falling object L is continuously falling from the dephosphorization furnace P. After the carriage 64 passes, the fallen matter L accumulates again under the furnace and around it.

After the cart 64 on which the ladle 8 is placed is moved to the hot water side, a pouring process is performed in which the hot metal of the current process after the hot metal treatment is finished is directed toward the ladle 8. The tapping process is performed by tilting the dephosphorization furnace P toward the ladle 8 by about 90 degrees. However, by tilting the dephosphorization furnace P, the bullion or the like attached to the furnace port is caused by its own weight. May fall on top. As described above, the fallen matter L accumulates on the first carriage transport line 61 even while the carriage 64 is waiting on the outlet side.
And after paying out the hot metal toward the ladle 8 on the carriage 64, the carriage 64 is advanced to move the ladle 8 containing the molten iron to the charging side (time point E). As the carriage 64 advances, the fallen objects L that have fallen on the first carriage conveyance line by the dephosphorization process, the tempering process, and the tapping process are gathered together by the first scraper 81 and pushed toward the hot water side. Then, when the carriage 64 is moved to the lower part of the fourth section, these fallen objects L are accommodated in the charging side pit 92.

In this way, the fallen matter L accumulated while moving the carriage 64 to the hot water side and waiting is scooped as the carriage 64 advances by the first scraper 81 attached to the front end portion of the carriage 64. The movement of the carriage 64 is not hindered by the falling object L, and the carriage 64 can be moved from the hot water side to the charging side within a predetermined time.
According to the present embodiment, the falling object L on the first carriage transport line 61 is efficiently processed by the scraper device 80 as the carriage 64 reciprocates. For this reason, even when the carriage 64 is waiting on either the charging side or the hot water side, it is difficult to move the carriage 64 on the first carriage transport line 61 when moving from the one side to the other side. There is no fear that the fallen object L will accumulate as much. Accordingly, the carriage 64 can be operated on time, and not only is the operation delay caused by the delay of the carriage 64 prevented, but also the operation time is prevented from being extended by waiting for the carriage. The

  In addition, since the first scraper 81 is provided at the front end portion of the carriage 64 and the charging side pit 92 is provided on the charging side, the falling object L can be processed by the advancement of the carriage 64. Since the second scraper 82 is provided at the rear end portion and the hot water side pit 91 is provided at the hot water side, the falling object L can be processed even when the carriage 64 moves backward. In addition, since the scraper device 80 and the pit 90 are provided in this way, the fallen object L is processed along with the minimum movement of the carriage 64 required for conveying the ladle 8. For this reason, it is not necessary to operate the trolley 64 only for the purpose of processing the fallen object L, and the operation time of the trolley 64 can be shortened, and consequently the operation time can be shortened.

FIGS. 8B and 8C are Comparative Example 1 and Comparative Example 2 for demonstrating the above-described effects. FIG. 8B shows the converter 1 in which the first scraper 81 is provided at the front end of the carriage 64 and the charging pit 92 is provided on the first carriage transport line 61, and includes the second scraper 82 and the hot water supply. The side pit 91 is not provided. Further, the first scraper 81 is supported by the carriage 64 via the attitude changing means 86.
In the converter 1, the falling object L is processed by moving the carriage 64 in a time when the dephosphorization process is completed in the dephosphorization furnace P.

  As indicated by α in FIG. 8B, when the dephosphorization process is completed in the dephosphorization furnace P, the carriage 64 places an empty ladle 8 on the loading seat 71 on the charging side (four districts). Waiting in the state. Then, by moving the cart 64 backward from the charging side to the hot water side while the first scraper 81 is set in the raised posture, the cart 64 moves to the hot water side without pushing the fallen object L. Then, after setting the second scraper 82 in the gathering posture with the cart 64 moved to the hot water side, the cart 64 is advanced from the hot water side toward the charging side. As a result, the fallen object L is gathered by the first scraper 81 and stored in the charging side pit 92.

Thereafter, the first scraper 81 is again set in the ascending posture, the carriage 64 is moved again from the charging side to the hot water side, and the dephosphorization process is finished on the empty ladle 8 that is located on the hot water side. The hot metal is to be dispensed.
According to the operation method as described above, the process of moving the carriage 64 only for processing the falling object L is incorporated into the normal process. As is apparent from the figure, this process takes about 3 minutes, and although the dephosphorization furnace P is in a state where it can be discharged, it has to wait for about 3 minutes until the carriage 64 reaches the charging side. As a result, the entire operation is extended by about 3 minutes.

In addition to this, when the fallen object L is large, the fallen object L may come into contact with the bottom surface of the carriage 64 to hinder the movement of the carriage 64. In order to avoid this, it is necessary to remove the fallen object L with the heavy equipment M before the carriage 64 is run.
FIG. 8C shows the converter 1 in which the second scraper 82 is disposed at the rear end portion of the carriage 64 and the hot water-side pit 91 is provided on the first carriage conveying line 61, and the first scraper 81 is provided. The charging side pit 92 is not provided. The second scraper 82 is supported by the carriage 64 via the attitude changing means 86.

In the converter 1, the scrap 64 is charged into the dephosphorization furnace P that has been subjected to the waste treatment in the previous process, and thereafter, the carriage 64 is set up in a period of time during which the hot metal from the current process is charged into the dephosphorization furnace P. The falling object L is to be processed by moving it.
As indicated by β in FIG. 8 (c), when the dephosphorization process is completed in the dephosphorization furnace P, the carriage 64 is located on the tapping side, and the ladle 8 containing the discharged hot metal is placed on the seat. It is waiting in the state of being placed on 71. At this time, falling objects L are accumulated on the first carriage transport line 61 by the dephosphorization process in the previous step, but the carriage 64 is moved from the hot water side to the charging side with the second scraper 82 set in the raised posture. By moving backward, the cart 64 moves to the charging side without processing the fallen object L. Then, after the carriage 64 is moved to the charging side, the second scraper 82 is set to the gathering posture, and then the carriage 64 is moved backward from the charging side to the hot water side. As a result, the fallen object L is collected by the second scraper 82 and stored in the hot water discharge side pit 91.

And the 2nd scraper 82 is again set to a raise attitude | position, Then, the trolley | bogie 64 is again moved toward the charging side from a tapping water side. Then, the hot metal containing ladle 8 positioned on the charging side by the movement of the carriage 64 is lifted by the second hot metal transport crane 53 and transported to the decarburization furnace C.
Also by the operation method as described above, the process of moving the carriage 64 to drop the falling object L is incorporated into the normal process. This process requires about 3 minutes as is apparent from the figure. In addition to this, when the fallen object L is large, the fallen object L may come into contact with the bottom surface of the carriage 64 to hinder the movement of the carriage 64. In order to avoid this, it is necessary to remove the fallen object L with the heavy equipment M before the carriage 64 is run.

Moreover, when removing the fallen object L with the heavy equipment M, it may take about 10 minutes to remove the fallen object L, and the cycle time may be extended by about 3 minutes as a whole from the viewpoint of the operation of the converter. There is.
As described above, the present embodiment can sufficiently process the fallen object L even if the number of movements of the carriage 64 is minimized, and the operation time can be extended by minimizing the number of movements of the carriage 64. It was demonstrated that it is superior to Comparative Example 1 and Comparative Example 2 in that it can be prevented.

The falling object L accommodated in the hot water side pit 91 and the charging side pit 92 is discharged out of the pit by a heavy machine M such as an excavator shown in FIG. At this time, the heavy machinery is carried from the ramps 91b and 92b of both pits 91 and 92. As a result, the heavy machinery M does not pass below the dephosphorization furnace P or approaches the bottom of the dephosphorization furnace P. Is safely transported towards the bottom of the pit.
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments. For example, when the dephosphorization process is performed in the second converter 22 and the third converter 2 is decarburized in the decarburizer C, the first converter 21 When the dephosphorization process is performed and the third converter 2 is decarburized in the decarburization furnace C, the same effects as in the present embodiment can be obtained.

In addition, it is also preferable to provide the hot water side pit 91 at a position outside the pair of traveling rails 66 in order to effectively remove the fallen object L falling outside the pair of traveling rails 66.
Further, for example, the processing stations 31 and 32 may be provided with only the payout pit 33, and even if the processing stations 31 and 32 are provided with the payout pit 33 and the desulfurization equipment 34, Even if it is equipped with, the thing provided with the removal equipment 35 and the desulfurization equipment 34 may be sufficient. The hot metal preliminary process in which the processing in the processing stations 31 and 32 is omitted is performed before the hot metal is transported to the processing stations 31 and 32, for example, while the hot metal is transported by the kneading vehicle 11.

It is an arrangement plan of converter equipment of this embodiment. It is a side view of the 1st bogie conveyance line. It is a partially broken side view of a trolley. It is a top view of a trolley. It is a front view of a trolley. It is a top view of a trolley | bogie apparatus. It is the schematic which shows the operating method of a converter facility, and the falling object collection method of a converter facility. (A) is a Gantt chart which shows operation of the converter equipment of this embodiment, (b) is a Gantt chart which shows operation of comparative example 1, (c) is a Gantt chart which shows operation of comparative example 2. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Converter equipment 3 Preliminary processing equipment 4 Scrap yard 5 Crane apparatus 6 Carriage apparatus 8 Ladle 9 Scrap chute 21, 22, 23 Converter 51 Crane line 52 1st hot metal conveyance crane 53 2nd hot metal conveyance crane 54 Scrap conveyance crane 61 First bogie transport line 62 Second bogie transport line 63 Third bogie transport line 64 Bogie 66 Traveling rail 80 Scraper device 81 First scraper 82 Second scraper 86 Posture changing means 90 Pit 91 Hot water side pit 92 Charging side pit

Claims (3)

Operation of the converter in a converter facility equipped with a converter and a dolly that can be loaded with a ladle and moves forward from the tapping side to the charging side under the converter and reverses from the tapping side to the charging side. In the falling object collection method of the converter equipment that collects falling objects that fall under the converter,
When the carriage loaded with the empty ladle is moved backward from the charging side to the hot water side, the falling objects are gathered to the hot water side by a scraper provided at the rear of the carriage,
After pouring the molten metal into an empty ladle positioned on the side of the hot water, when the cart is advanced from the hot water side to the charging side, the falling object is placed on the charging side by a scraper provided at the front of the cart. A method for collecting fallen objects in converter facilities, characterized by being collected together.   The method of operating a converter facility according to claim 1, wherein the backward movement of the cart is performed during a period from blowing to before hot water, and the forward movement of the cart is performed after hot water.   The falling objects collected on the charging side are accommodated in the charging side pit provided on the charging side, and the falling objects collected on the tapping side are accommodated in the tapping side pit provided on the tapping side. The fallen object collection method of the converter equipment of Claim 1 or 2 characterized by the above-mentioned.

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