JP2003200244A - Material transfer method and material transfer equipment in continuous casting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate any temporal and physical interferences between the primary cutting and the secondary cutting by merging a material with any defective portion removed therefrom in a carrying line of a cut material without any defective portion as a casting order of the continuous casting between a continuous casting facility and a hot rolling facility. <P>SOLUTION: In the method for carrying the material from the continuous casting facility to the following hot rolling facility, preceding cast materials A1-F1 having defective portions are carried to a secondary torch 2 disposed on the downstream side on the same line as a primary torch 1, and the defective portions are cut and removed. Then, the preceding materials are cut to the predetermined length by the primary torch 1, and merged again as the casting order between normal materials A2 to F2 carried to the hot rolling facility in the following step. Thus, any physical and temporal interferences between the primary and secondary torches are eliminated, no obstructions such as degradation of the casting speed occur, and the material can be carried as the rolling order of the hot rolling facility of the following step. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for efficiently transporting a material between a continuous casting facility and a hot rolling facility in the next step, and a material transport facility for carrying out this method.

[0002]

2. Description of the Related Art Generally, a slab cast by a continuous casting facility has an uneven tip. This is because the dummy bar is generally used at the start of casting in continuous casting, and therefore the connecting portion of the cast piece with the dummy bar becomes uneven due to the shape of the tip of the dummy bar.

On the other hand, the portion of the continuously cast slab located in the middle is usually cut at both the front and rear ends by a primary cutting machine (hereinafter referred to as "primary torch") and does not become uneven. However, if any abnormality (such as a flaw, a predetermined temperature, or deviation from the composition) occurs during casting, that portion naturally becomes a defective portion.

Further, since the molten steel injected from the tundish is formed in a state of being closed by the sliding gate of the dipping nozzle, the rear end of the continuously cast slab becomes uneven like the front end.

By the way, in the hot rolling equipment in the next step of the continuous casting equipment, for example, in terms of equipment for producing seamless pipes from billets, the rolling mill measures the dimensions of the material to be rolled (outer size of billet, length, material). According to the above, the opening degree of the mill of the rolling mill and the rolling force are automatically set.

Therefore, when the material according to the rolling schedule is not supplied, the above setting must be changed, which causes the subsequent facilities to change the schedule. As a result, the rolling operation rate is reduced and the productivity is reduced.

[0007] That is, when viewed from the rolling equipment side, the billet, which is a material for rolling, must be supplied from the continuous casting equipment side according to the rolling schedule. On the other hand, on the continuous casting facility side, it is necessary to operate at a predetermined casting speed in order to ensure the quality and productivity of the material to be continuously cast.

However, in the case of a material manufactured by continuous casting, for example, a billet, it is necessary to cut and remove the leading end portion of the cast head material, the trailing end portion of the billet, and the like as defective portions. In addition to this, there are cases in which partial cutting is performed in order to collect and analyze samples for reasons of defective casting and quality assurance.

Conventionally, the cutting of these defective portions and the like is referred to as a "secondary torch" (hereinafter referred to as "secondary torch"), which is arranged at a relatively close position on the same line as the primary torch for cutting to a predetermined length. However, in this case, the cutting time interferes with each other.Therefore, the casting speed is restricted in the case of continuous casting equipment with many strands, especially when the casting speed is high. This causes a drop in molten steel temperature in the pan and tundish, leading to problems such as quality deterioration and nozzle clogging.

On the other hand, when the defective portion is cut off by the secondary torch, for example, as shown in FIG. 3, when the cutting is performed off-line, the primary torch 1 of the first and second strands has a predetermined length. After the material having a defective portion among the cut materials is conveyed to the secondary torch 2 to cut the defective portion at the tip, the material from which the defective portion is cut is subjected to the original continuous casting in the rolling order in the rolling equipment. It is necessary to return to line 3.

In FIG. 3, 4 is a continuous casting machine, 5 is a transfer facility between the continuous casting line 3 and the secondary torch 2, 6 is a transfer facility from the continuous casting line 3 to the next step, and 7 is a sample cutting unit. The third cutting machine to perform is shown.

[0012] By the way, when the continuous casting equipment (slab, bloom, billet) and the hot rolling equipment for the next step (slabbing equipment, hot strip mill, seamless mill, etc.) are directly connected and operated, the material is usually fed between them. There is a yard for storing. This yard is provided for the purpose of temporarily storing the material or for cooling it to an appropriate temperature because the continuous casting equipment and the hot rolling equipment have different production capacities and production schedules.

In a multi-strand continuous casting facility, each strand is generally mechanically and electrically independent,
In general, the casting is started in a staggered manner rather than at the same time for each strand. Further, in a multi-strand continuous casting facility, the casting speed and the cutting length also differ for each strand.

Therefore, the time at which the material cut by the primary torch arrives at the payout device to the yard varies from strand to strand. The delivery device to this yard generally cannot receive the next material after delivering the material until it returns to the original position after delivering the material. If the is dispensed immediately after arrival, the material of the other strand must wait until the dispenser returns to the return position.

On the other hand, when all the materials are delivered together after all the strands arrive, the waiting as described above is not necessary, but the material of the first strand has arrived of all the remaining strands of material. I have to wait until.

Then, in the worst case, it is necessary to reduce the casting speed of the strand arriving earlier to extend the time of the material to be cut. The decrease in casting speed adversely affects the quality of the material and also deteriorates the production efficiency. In addition, the lowering of the casting temperature may cause clogging in the dip pipe for injecting molten steel from the tundish into the mold.

Therefore, it is necessary to optimally discharge the material to the yard in the shortest time so as not to cause the stagnation of each strand. Usually, continuously cast slabs are
After being processed with a primary torch for cutting to a predetermined length and a secondary torch for cutting and removing defective parts, it is conveyed to the next process, but during this conveyance, do not reduce the casting speed. Need to cut quickly.

Therefore, in Japanese Patent No. 3139376, a cutting machine of three lines is provided on the main line, and a secondary cutting machine for crop cutting is installed on the side of the primary cutting machine and a slab traverse device is used. There is disclosed an apparatus that transfers a material to be next cut to prevent interference between the primary cutting and the secondary cutting and efficiently process a slab.

[0019]

However, the apparatus disclosed in the above-mentioned Japanese Patent No. 3139376 is not premised on the direct connection operation of the continuous casting equipment and the hot rolling equipment of the subsequent step, and only the primary cutting is performed. It just eliminates the physical and time interference between the machine and the secondary cutting machine. This is because the order of conveying the slabs after cutting is not taken into consideration. Therefore, the material after cutting cannot be conveyed to the next step in the casting order by the conveyance using this apparatus.

The present invention has been made in view of the above-mentioned conventional problems, and automatically cuts the defective portion of the continuously cast material between the continuous casting equipment and the hot rolling equipment in the next step, The material from which the defective parts have been removed is joined to the cutting material transfer line where there are no defective parts in the casting order of continuous casting, and the material transfer that eliminates the temporal and physical interference between the primary cutting and the secondary cutting. It is an object of the present invention to provide a method and a material transportation facility for carrying out this transportation method.

[0021]

In order to achieve the above-mentioned object, in the material conveying method in the continuous casting equipment according to the present invention, a material having a defective portion is arranged downstream of the primary torch on the same line. After being conveyed to the next torch to cut and remove the defective part, it is cut into a predetermined length by the primary torch, and is merged again between the normal materials conveyed to the hot rolling equipment of the next process in the casting order. I have decided. Then, by doing so, the normal material from which the defective portion of the tip shape has been removed, without impeding the conveyance of the normal material, according to the casting order of the continuous casting, the normally cut next cutting material. It is possible to join the conveyor line.

In the material conveying method in the continuous casting facility according to the present invention described above, the secondary torch for cutting and removing the defective portion of the material is arranged on the same line as the downstream side of the primary torch, and the secondary torch is The downstream conveying line branches between the primary torch and the secondary torch, and the defective portion is cut and removed at a location where it merges with the conveying line of the normal material cut to a predetermined length by the primary torch. It can be carried out by the material conveying equipment in the continuous casting equipment according to the present invention, which is provided with a merging device for merging again according to the casting order.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The material conveying method in a continuous casting facility according to the present invention is a method for conveying a material from a continuous casting facility to a hot rolling facility in the next step, in which a material having a defective portion is the same as a primary torch. After cutting and removing the defective part by transporting it to a secondary torch arranged downstream on the line, it is cut to a predetermined length by the primary torch, and between normal materials transported to the hot rolling equipment of the next step, It joins again according to the casting order.

According to the material transporting method in the continuous casting facility of the present invention, the normal material from which the defective portion of the tip shape is removed can be processed in the casting order of the continuous casting without obstructing the transport of the normal material. Then, it is possible to join the normally cut next cutting material conveying line and eliminate the time and physical interference between the primary cutting and the secondary cutting. As a result, the hot rolling equipment can accurately receive the material according to the rolling schedule from the continuous casting equipment.

In the material conveying method in the continuous casting facility according to the present invention described above, the secondary torch for cutting and removing the defective portion of the material is arranged on the same line as the downstream side of the primary torch, and the secondary torch is The downstream conveying line branches between the primary torch and the secondary torch, and the defective portion is cut and removed at a location where it merges with the conveying line of the normal material cut to a predetermined length by the primary torch. It can be carried out by the material conveying equipment in the continuous casting equipment according to the present invention, which is provided with a merging device for merging again according to the casting order.

In the above-mentioned present invention, the secondary torch is arranged on the same line as the downstream side of the primary torch, because it takes time to cut the material, so the material to be secondarily cut is conveyed to the secondary torch as quickly as possible. It is necessary to do so.

Further, when the material is conveyed by the material conveying method in the continuous casting equipment according to the present invention, when the material is tracked, the normal material from which the defective portion of the tip shape is removed is continuously cast. It is possible to more efficiently and surely join the next cut material conveying line that has been normally cast in accordance with the loading order.

This material conveying method is applied to the material conveying equipment in the continuous casting equipment according to the present invention, in which the normal material conveying line branched between the primary torch and the secondary torch and the wake of the secondary torch. An image processing reading device is further arranged on each of the arranged defective portion cutting and removing material conveying lines, and a marking device is further arranged upstream of each of the image processing reading devices in the downstream of the primary torch and downstream of the secondary torch. This makes it possible.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A material transfer facility in a continuous casting facility according to the present invention will be described below based on an embodiment shown in FIG. 1, and a material transfer method in a continuous casting facility according to the present invention using this material transfer facility will be described. To explain. FIG. 1 is a plan view showing an example of a 6-strand round billet continuous casting facility, a billet yard in the next step, and a material transport facility according to the present invention to a hot rolling facility in the next step.

The molten steel cast in the mold (not shown) of each of the first to sixth strands is cooled from the outer peripheral side by a mold and a spray cooling body (not shown), solidified and rounded. It is made into a billet and pulled out by a pinch roll (not shown).

Each of these round billets is cut to a predetermined length (molecule) by the primary torch 1, but the cast head materials A1 to F1 of each strand are connected to the dummy bar,
Since the shape of the tip portion is uneven, it cannot be conveyed to the next step and subjected to hot rolling as it is,
Once transported to the secondary torch 2, the tip portion thereof is cut here, and then transported to the hot rolling equipment of the next step.

For the material cutting by the secondary torch 2, the defective portion is measured again on the secondary torch 2 side from the material length measured by the measuring ring on the primary torch 1 and the defective portion is removed. It goes without saying that the length of the material used is guaranteed.

On the other hand, materials A2 ...- F2 ... (hereinafter, "materials A2 ...
F2 ... " ) Usually has no uneven shape at its tip, so after being cut to a predetermined length by the primary torch 1, it is not sent to the secondary torch 2 and is used in the hot rolling equipment of the next step. Be transported.

According to the present invention, when conveying a round billet in such a continuous casting facility, as shown in FIG. 1, the secondary torch 2 is arranged downstream of the primary torch 1 on the same continuous casting line 3. , The tip of the secondary torch 2 at a position where the downstream conveying line 8 merges with the conveying line 9 of the materials A2 ... F2 ... after the head cut to a predetermined length by the primary torch 1. Cast head material A with parts removed
A merging device 1 for merging 1 to F1 again in a casting order.
The material is transported as described below by using the material transport facility having the configuration of 0.

11 is a primary torch 1 in each strand
Is a marking device installed between the secondary torch 2 and the continuous casting line 3 and upstream of the payout device 9a that constitutes the transfer line 9 installed at a right angle to the continuous casting line 3, for example. Thereafter, markings as tracking information, for example, a strand number, a charge number, and a molecule number are applied to the tip surfaces of the materials A2 ... F2.

Reference numeral 12 denotes a delivery side of a payout device 8a constituting the transfer line 8 installed at a right angle, for example, in the downstream of the secondary torch 2 arranged downstream on the same continuous casting line 3 as the primary torch 1. Is a marking device installed in
In the same manner as above, marking for identifying the material is made on the cut surfaces of the leading materials A1 to F1 from which the defective tip portion has been cut and removed by the secondary torch 2, in accordance with instructions from the computer.

The markings made by the marking devices 11 and 12 are made according to material specifications (size, material,
If information that can be identified by the destination etc. is added,
Any of engraving, paint marking, label, etc. may be adopted.

The markings made on the front end surfaces of the materials A2 ... F2 ... by the marking device 11 from the beginning are marking readers provided on the entrance side of the transport table 9b provided subsequent to the dispensing device 9a. 13 and by the marking device 12 the leading materials A1 to F
The markings provided on the cut surface of No. 1 are checked by the marking reader 14 provided on the entrance side of the transport table 8b provided subsequent to the payout device 8a according to the instructions of the computer. Is read and verified. This reading is generally performed by image processing by a camera, but other methods may be used.

Thereafter, the leading materials A1 to F1 are transported to the merging device 10 by the transport table 8b, and the materials A2 ... to F2 ...

In the present invention, the materials A2 ... to F2 ... from the head in the yard 9c are sent in the order of casting without breaking the order, and the defective portions conveyed from the secondary torch 2 are removed. In the confluence device 10 with the leading materials A1 to F1
As shown in FIG. 2, they are assembled so that they are in the original casting order. As the merging device 10, for example, a transfer device using a walking beam is adopted.

That is, in the present invention, among the materials cast by the continuous casting facility and cut by the primary torch 1 to a predetermined length,
The leading materials A1 to F1 are discharged to the secondary torch 2 side, and the leading materials A2 ... to F2 ... are discharged to the transport line 9 in two directions, and these materials are merged again by the merging device 10.

In carrying out the present invention described above,
An important point in the direct-coupling operation is to convey the material cast in the continuous casting equipment to the hot rolling equipment in the next process in the rolling order without changing the conveying order.

For that purpose, first, it is necessary to identify each material and to recognize where the material is (tracking). In order to identify this material and to recognize its position (tracking), the marking device 11, 1 is used in the present invention.
A sensor that assigns a number, a symbol, etc. to each material by 2 and performs subsequent identification and position recognition with the marking readers 13 to 15 at appropriate positions to detect the presence or absence of the material at a required position. By tracking with (not shown), the process computer can accurately recognize where each material is, and the material coming from the secondary torch 2 side from the primary torch 1 side in the original casting order can be recognized. It is possible to interrupt the incoming material. Reference numeral 15 is a marking reader installed downstream of the merging device 10.

In the above embodiment, the case where the material tracking is performed has been described. However, the time required for cutting the defective portion in the secondary torch 2 and the transportation time to reach the merging device 10 in each of the transportation lines 8 and 9 are described in advance. From the merging device 10
It is also possible to join again according to the casting order.

[0045]

As described above, according to the present invention,
It is possible to eliminate physical and time interference between the primary torch and the secondary torch, to prevent occurrence of obstacles such as a decrease in casting speed, and to convey the material in the rolling order of the hot rolling equipment in the next step. Then, when all the materials are tracked, it becomes possible to smoothly convey them without mixing different materials. That is, according to the present invention, in the direct coupling operation of continuous casting and hot rolling, it is possible to eliminate these adverse effects and efficiently perform the material supply from the continuous casting equipment to the hot rolling equipment. Become.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a 6-strand round billet continuous casting facility, a billet yard in the next step, and a material transport facility according to the present invention to a hot rolling facility in the next step.

FIG. 2 is a diagram illustrating a casting order of round billets cut into a predetermined length by a primary torch in each strand.

FIG. 3 is a plan view showing an example of conventional material transfer equipment for a continuous casting equipment for two strands and a hot rolling equipment for the next step.

[Explanation of symbols]

1 primary torch 2 secondary torch 3 Continuous casting line 4 Continuous casting machine 8 conveyor lines 9 Conveyor line 10 Confluence device 11 Marking device 12 Marking device 13 marking reader 14 marking reader A1-F1 Casting top material A2 ... to F2 ... Material from the beginning

Claims (4)

[Claims] 1. A method of transporting a material from a continuous casting facility to a hot rolling facility in the next step, in which a material having a defective portion is transported to a secondary cutting machine arranged on the same line and downstream of the primary cutting machine. After removing the defective part by cutting and cutting it to a predetermined length by a primary cutting machine, it joins again between the normal materials conveyed to the hot rolling equipment of the next process in the casting order again. Material transfer method for continuous casting equipment. 2. A facility for carrying out the material conveying method in the continuous casting facility according to claim 1, wherein a secondary cutting machine for cutting and removing a defective portion of the material is arranged on the same line and downstream of the primary cutting machine. Along with the secondary cutting machine, the downstream conveying line branches between the primary cutting machine and the secondary cutting machine, and joins with the conveying line of the normal material cut to a predetermined length by the primary cutting machine. A material conveying facility in a continuous casting facility, comprising a merging device for merging the material from which the defective portion has been cut and removed again according to a casting order. 3. A material conveying method in a continuous casting facility, wherein the material is tracked when the material is conveyed by the material conveying method in the continuous casting facility according to claim 1. 4. A facility for carrying out the material transportation method in the continuous casting facility according to claim 3, wherein a normal material transportation line branched between the primary cutting machine and the secondary cutting machine and after the secondary cutting machine. An image processing reading device is provided in each of the defective line cutting and removing material conveying lines, and a marking device is provided upstream of each of the image processing reading devices in the downstream of the primary cutting machine and the downstream of the secondary cutting machine. The material transfer facility in the continuous casting facility according to claim 2, further comprising: