JPH0259107A - Method and device for transferring hot steel slab - Google Patents

Abstract

PURPOSE:To reduce radiation of holding heat of a slab and to reduce a fuel consumption unit of a heating furnace by sequentially and lengthwise putting hot slabs on inside skids by opening a door on a side of a heat insulating box on a carriage and delivering the slabs in the order of putting by opening a door on the other side. CONSTITUTION:Slabs 10 on a slab transferring roller table 6 are raised in the width direction by a handler 7 and are shifted and put on skids 3 in an enclosed type heat insulating box 2 with doors one by one by opening a side door 1-3 of the box 2 on a carriage 1 installed along the table 6. Then, plural slabs 10 are vertically put on the skids 3 in the width direction of the box 2 and are piled with fall preventing holders 4, 5. Next, the door 1-3 is closed and the slabs 10 are transferred. As for delivering the slabs 10, a side door 1-4 on the opposite side is opened and the slabs 10 are taken off in the order of putting.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method and apparatus for transporting a continuously cast high-temperature slab to a rolling process while suppressing the temperature drop of the slab as much as possible in order to effectively utilize the heat retained in the slab. [Prior art] When conveying continuously cast slabs to the rolling process, no consideration was previously given to the apparent effective use of the slab itself, so conveyance devices such as carts and roller tables were not equipped with heat insulating means. It was not equipped and was transported in an open state. Therefore, with this type of conveyance method, heat dissipates during conveyance and the slab temperature drops, and the slab cannot be rolled at the temperature it reached the rolling process, so it is reheated in a heating furnace to lower the humidity to a temperature that can be rolled. It was common to roll after compensation. However, recently, from the perspective of energy conservation, new processes such as hot charging, direct rolling, and direct quenching that effectively utilize the heat retained in steel materials have been realized, and heat retention in conveying lines for high-temperature steel materials such as continuous casting slabs has become one of the It has become an important elemental technology. In order to effectively utilize the heat retained in continuous casting slabs, it is most ideal to install the continuous casting plant and the rolling plant in close proximity to reduce the temperature drop by shortening the general transport time. It is not easy to implement, as it requires the installation of appropriate equipment. For this reason, various methods have been proposed for transporting the slab between an existing continuous casting plant and a rolling mill while preserving the heat retained in the slab as much as possible. Representative examples are shown below. ■ A method of covering the roller table with a heat insulating cover lined with a heat insulating material such as ceramic fiber to prevent the heat retained in the steel material from dissipating into the atmosphere. ■ Transport method using a high-speed trolley with a thermal cover. ■ - A method of loading and transporting multiple slabs on a trolley. [Problem to be solved by the invention] However, with the conventional transportation method described in (2) above, it takes a lot of time and effort to install and remove the heat insulating cover, and not only is it impossible to respond quickly when a problem occurs, but the heat insulating cover is Due to the insufficient airtightness of the joints, a large heat retention effect cannot be expected, and transporting over several hundred meters requires a certain amount of transport time (more than 5 minutes) due to table speed restrictions, forcing the temperature to drop. There is a drawback. In addition, in the case of the high-speed conveyance method (■), the conveyance time is limited due to equipment restrictions on the speed of the trolleys in order to convey slabs one by one. Therefore, in order to accommodate the rolling pitch, the running rails are made into double tracks, and the number of trolleys is increased. It is necessary to increase the number of times and operate the system cyclically, which not only increases the equipment cost but also has the drawback that it is difficult to control the operation of the trolley. In addition, in the case of the method (3) of conveying multiple sheets at the same time, the normal method of placing them horizontally and stacking them and piling them up and down,
In order to match the casting order and the rolling order, the piling device and the debi ring device become complicated and require large-scale equipment, which is not practical. This invention was made in view of the problems of the conventional technology, and its purpose is to provide a relatively simple method even if the distance between an existing continuous casting plant and a rolling mill is several hundred meters or more. It is therefore necessary to propose a conveying method and apparatus that can reduce the temperature drop of the continuously cast slab as much as possible and effectively utilize the heat retained in the slab.

[Means for Solving the Problems 1] The present invention proposes that in order to transport the continuously cast slab to the rolling process without dissipating the heat retained in the continuously cast slab as much as possible, the first step is to transport the high temperature slab as quickly as possible. Therefore, a self-propelled trolley is suitable.Secondly, in terms of equipment cost, the equipment needs to be simple enough to require only one transporter.Thirdly, when transporting using a trolley-carriage, it is compatible with the rolling pitch. In order to do so, it is necessary to pile and transport multiple slabs at the same time.Fourthly, in the case of piling transport, it is necessary to load so that the casting and rolling parts are not reversed. We proposed a transport method and device that satisfies four points, and the gist of this is a closed-type heat-insulating system with an opening/closing door that consists of a heat-insulating panel lined with a heat-insulating material on a trolley, and a number of skids arranged at intervals in the longitudinal direction. In the method of transporting high-temperature slabs using a ``zero carriage'' equipped with a box, the slab must be carried in by opening one side door of the insulation box and placing the high-temperature slab vertically on the skid inside the insulation box. At the same time, the TA transport method is characterized in that a plurality of slabs are stacked and piled in the width direction of the thermal insulation box, and the slabs are taken out by opening the side door on the opposite side and taking out the slabs in the order in which the slabs are brought in, and the loading and unloading of the slabs is carried out by a transfer machine. The device is a self-propelled trolley with an enclosed heat-insulating box consisting of a heat-insulating panel lined with a heat-insulating material, with one side wall heat-insulating panel movable up and down to serve as a door for loading and unloading high-temperature slabs. The thermal insulation box has a number of skids arranged at intervals in the longitudinal direction of the box, and holds a plurality of high-temperature slabs placed vertically on the skids and stacked in the width direction of the thermal insulation box. The slab transfer machine is equipped with a holder to prevent slabs from falling over, and has a slab holder that can move up and down, move back and forth, and rotate.
This system is characterized by the method of loading and unloading high-temperature slabs. [Function] The conveyance truck is installed along the roller table for conveying slabs, and the side wall door of the sealed heat insulation box with an opening/closing door mounted on the truck is opened to raise the slab on the roller table in the width direction and keep it warm. Carry in and place one sheet at a time on the skid inside the box. Slabs are transported into the heat insulation box using a slab transfer machine installed on the roller table side. A plurality of slabs are stacked vertically on the skid inside the insulation box in the width direction of the insulation hox. A plurality of slabs stacked vertically on a skid inside a thermal insulation box are piled up using retainers to prevent them from tipping over. Piling multiple slabs in a thermal box will result in
The side door of the thermal insulation box is closed and transported in an airtight state. To carry out the slabs in the heat insulation box, open the side door on the opposite side to the carry-in side and take out the slabs in the order in which they were carried in. Since the slabs are transported using self-propelled carts, they can be transported stably without any trouble. Since the conveyance truck can convey multiple slabs at once, it can correspond to the rolling pitch. By adopting a method in which slabs are stacked vertically and transported, the slabs can be piled and transported without changing the order of the slabs, and the slabs can be rolled in the order in which they are cast. [Embodiment] Fig. 1 and Fig. 2 are schematic diagrams showing an embodiment of the device of the present invention, Fig. 1 is a plan view showing a conveyance vehicle across the vehicle, and Fig. 2 is a schematic diagram showing a device according to an embodiment of the present invention. FIG. As shown in the diagram, the transport vehicle (1) is equipped with a heat-retaining panel consisting of an iron shell (1-1) lined with a heat insulating material (1-2), and is attached to the left stone side wall (1-1).
3) A closed heat insulation box (2) consisting of (1-4), front and rear walls (1-5) (1-6)), a bottom plate (1-7) and a ceiling (1-8) is mounted on a trolley. It has a structure that
Left and right side walls (1-3H1-4) of the closed heat insulation box (2)
) is an elevating system for loading and unloading slabs. Skids (3) are provided inside the closed heat insulation box (2) at equal intervals in the longitudinal direction of the box. Elevating slab lower holders (4) are attached to both ends of the skid. Furthermore, a pair of slab upper holders (5), which are slidable in the width direction of the box and movable up and down, are provided between each skid. The slab transport vehicle (1) is installed close to and parallel to the roller table (6) at the outlet of the continuous casting machine, and the upper surface of the skid (3) is set at approximately the same height as the upper surface of the roller table (6). is. A slab transfer machine (force) is installed on the roller table (6) in an area approximately equivalent to the length of the thermal insulation box (2).As shown in the figure, this slab transfer machine moves up and down between each roller, It is equipped with a cross-sectional slab receiver (7-1) that performs three operations: movement and rotation, and the roller table (6)
It has the function of lifting the upper slab (10) and carrying it into the heat insulation box (2), rotating it 90 degrees at a predetermined position, and placing the slab upright on the skid (3). Next, a transport method using the above device will be explained with reference to FIG. That is, when carrying in the slab (10) on the roller table (6), first raise and open the elevating door (1-3) on the entrance side of the insulation box (2), and then open the elevator door (1-3) on the entrance side of the insulation box (2).
) of the skid (3) in the lower part of the skid is lowered from the level of the skid, the lower part of the exit part (4) is raised to protrude from the upper surface of the skid, and then the upper part of the retainer (5) is lowered.
With the slab raised to a height that does not interfere with the loading, the slab transfer machine (7) is activated to raise the slab receiver (7-1) and lift the slab (10), so that the slab is transferred to the roller table (6). ) The slab receiver (7-1
) to carry the slab into the insulation box (2) (Figure A). When the slab is carried to the designated position, the slab receiver (7-1
) from the horizontal position upwards by 90 degrees to create a slab (10
stand vertically and bring the lower part of the side surface of the slab into contact with the outlet lower holder (4) of the skid (3). In this state, lower the slab receiver (7-1) and move the slab (10) onto the skid (3).
Place it on top (Figure B). When the slab (10) is placed on the skid (3), the upper part of the skid is clamped and fixed with the upper holder (5) to prevent the slab from falling over (Figure C), and then the slab receiver (7-1) is From the vertical position, tilt down 90 degrees and return to the original horizontal position.
It is moved back to the roller table (6) side again and enters the second slab loading system (Figure D). When the second slab (10) arrives above the slab receiver (7-1), repeat the same operation as above to move the slab (10)
0) into the thermal insulation box (2) (Figure E). When the slab is carried in to the specified position, raise the upper holder (5) on the carry-in side of the wood-grained slab, and then lift the slag receiver (
7-1) upwards (Fig. F) and the second slab (10
) is brought into close contact with the first slab, and the upper part of the slab is clamped and fixed with the holder (5) (Figure G). Thereafter, the same operation as above is repeated to load the slab in order. When the last slab is loaded onto the skid (3), the lower holder (4) on the entrance side of the skid is raised to support the lower part of the slab, and the upper holder (5) The upper end of the slab group is fixed at the step, and then the entrance side elevating type fi (1-3) is lowered to seal the heat insulation box (2) (Figure H). In this state, it is transported to the rolling mill. In the rolling mill, the elevating door (
1-4), lower the lower holder (4) on this side, raise the lower holder (5), take out the slabs in the order they were loaded, and transfer them to the roller table of the rolling line. Note that the slab is also taken out by the same machine (not shown) as the slab loading transfer machine (7). [Effect of the invention 1 As explained above, according to the method and apparatus of the invention,
This produces the following effects. ■ Continuously cast slabs are transported by a transport vehicle equipped with a closed thermal insulation box, which greatly reduces external dissipation of the heat retained in the slabs, and significantly reduces the fuel consumption of the heating furnace in the rolling mill. ■ Since multiple slabs can be transported at one time using -carries, the transport line can be simplified, equipment costs and operating costs can be reduced, and the rolling pitch can be fully accommodated. ■ Since slabs are loaded vertically, even if multiple slabs are loaded, the casting and rolling order can be transported without being reversed.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic diagrams showing an embodiment of the present invention, in which Figure 1 is a plan view across the transport vehicle, and Figure 2 is a vertical cross-sectional side view taken along the line ■-■ in Figure 1. , Figure 3 is an explanatory diagram of the operation of this invention, where Figure (A) shows the state in which the first slab is carried into the heat insulation box, and Figure (B) shows the slab being transferred to the skid in the heat insulation box. Figure (C) is a diagram showing the state in which the first slab is placed vertically on the skid. ) is a diagram showing the state in which the second slab is carried into the insulation box, and the diagram (F
) is a diagram showing the second slab standing vertically, Figure (G) is a diagram showing the second slab placed on the skid, and Figure (H> is a diagram showing a predetermined number of slabs placed in a heat insulation box. FIG.

Claims (1)

[Claims] 1. A high-temperature slab is transported by a transport vehicle equipped with a closed heat insulation box with an opening/closing door, which is constructed of a heat insulation panel lined with a heat insulating material and has a number of skids arranged at intervals in the longitudinal direction. In this method, the slabs are brought in by opening one side door of the insulation box, placing the high-temperature slab vertically on the skid inside the insulation box, stacking multiple slabs in the width direction of the insulation box, and stacking the slabs. To carry out the slabs, open the side door on the opposite side and take out the slabs in the order in which they were carried in.
A method for transporting high-temperature steel materials, characterized in that unloading is carried out by a transfer machine. 2. A closed-type heat-insulating box consisting of a heat-insulating panel lined with a heat-insulating material, with one side wall heat-insulating panel movable up and down to serve as a door for loading and unloading high-temperature slabs, is mounted on a self-propelled trolley, and the above-mentioned heat-insulating The box has a number of skids arranged at intervals in the longitudinal direction of the box, and a holder for preventing overturning holds a plurality of high-temperature slabs placed vertically on the skids and stacked in the width direction of the insulation box. A conveying device for high-temperature steel materials, characterized in that the high-temperature slabs are loaded and unloaded by a slab transfer machine having a slab receiver that can move up and down, move forward and backward, and rotate.