JP2023072826A - Fixing device for high temperature melt treatment pot, transfer truck and high temperature melt treatment pot - Google Patents

Abstract

To provide a fixing device for a high temperature melt treatment pot capable of suppressing the fluctuation of a high temperature melt treatment pot, eliminating the movement of a truck to be mounted with the pot and preventing the scattering of a high temperature melt in the pot, a transfer truck for the treatment pot and the treatment pot.SOLUTION: A device fixes a pot mounted via a pair of pot pedestals onto a truck for transferring a pot treating a high temperature melt from the outside of the truck comprises pot fixing means for sandwiching the pot pedestals from both sides of the pot pedestals. The pot fixing means comprises: two arm parts driving in a vertical direction onto a cradle installed in the outer part of the truck; and hold parts connected to the respective end parts of the arm parts. The hold parts are brought into contact with the pot pedestals when the arm parts are driven from the upper part to the lower part and sandwich the pair of pot pedestals from both the sides to fix the pot. In this way, the fluctuation of the pot can be suppressed to prevent the scattering of a high temperature melt.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a high-temperature melt processing pan fixing device and a high-temperature melt processing pan transport carriage for preventing escape of a cart on which a high-temperature melt processing pan is mounted, and the high-temperature melt processing pan.

2. Description of the Related Art Conventionally, in the iron industry, hot metal tapped from a blast furnace is transported to a converter, and a hot metal ladle is used as a container at that time. After receiving hot metal in a hot metal ladle, hot metal pretreatments such as desulfurization, dephosphorization, and desiliconization are performed while the hot metal ladle is being transported to a converter. Such a ladle for treating high-temperature melts is mounted on a trolley and transported to a facility for hot metal pretreatment or the like, where the trolley is stopped in the facility for treatment. However, since these treatments are performed by blowing gas from above the pot and stirring it vigorously, the pot shakes violently due to the vibration, and it is assumed that the truck was fixed by installing stoppers in front and behind the wheels of the truck. However, the ladle could not endure the rocking movement and would start to run away, causing hot metal and other high-temperature melts to spill or fly out, which was a serious safety problem.

As a conventional technology for preventing the runaway of the truck, as described above, a rail-mounted runaway prevention stopper is used. is.

Alternatively, there is a type in which some kind of member is provided inside the bogie to fix the bogie on the rail. For example, in Patent Document 1, a moving path connecting a plurality of hot metal ladle devices, and a moving truck that supports a stirring device and can move along the moving path, and a plurality of moving trucks installed between the moving path A hot metal desulfurization apparatus having a stopper mechanism, wherein the stopper mechanism includes a fixed side member fixed to a moving path, a moving side member installed on a carriage, and a mechanism for bringing the moving side member into contact with the fixed side member. and a contact mechanism, wherein at least one pair of a plurality of stopper mechanisms is arranged such that the horizontal components of the contact directions of the moving-side members with respect to the stationary-side member are opposite to each other. there is

In addition, Patent Document 2 discloses a desulfurization device for performing desulfurization by adding a desulfurizing agent to hot metal in a hot metal ladle and stirring the hot metal, comprising a housing portion for housing the hot metal ladle placed on a ladle tilting device, A desulfurization device is disclosed in which a plurality of fixing devices for suppressing vibrational force due to stirring of the desulfurization device are provided in the upper and lower stages of the storage section.

Japanese Patent No. 6277310 Japanese Unexamined Patent Application Publication No. 2014-201780

However, in Patent Document 1, although the movable carriage is fixed, if the hot metal ladle device is violently swayed, the carriage cannot be completely fixed due to the swaying, and the carriage may move or the hot metal in the ladle device may be dislodged. I had a problem with the splatter.

In Patent Document 2, a fixing device is provided in a housing portion for housing a hot metal ladle. There was a problem that the hot metal inside spattered.

As described above, the conventional equipment lacks strength against swinging of the truck on which the hot metal and other high-temperature molten processing ladle is mounted, and the swinging of the ladle cannot be suppressed. It was not possible to completely prevent it from running away, and there was a problem that the high-temperature molten material was scattered. Furthermore, the actual situation was that failures frequently occurred due to dregs scattered during processing and being bitten by ingots.

In addition, conventional stoppers and fixing devices also have the problem that the gap between the carriage to be fixed and the fixing stopper is adjusted, and the stopper is worn and reduced due to the swing impact force.

The present invention solves the above-mentioned problems, suppresses the swinging of the high-temperature melt processing ladle, eliminates the runaway of the carriage on which the ladle is mounted, and prevents the high-temperature melt from scattering in the ladle. The purpose of the present invention is to provide a fixing device and a carriage for transporting a hot melt processing pan, and the hot melt processing pan.

In order to solve the above problems, the inventors of the present invention investigated a mechanism that does not suppress the rocking of the pan even if the cart is fixed as in the conventional technology. The relationship with the fixing position is a problem, and we found that it is better to fix on the line of action passing near the center of gravity than to fix it at a position away from the center of gravity. We found that the vibration can be suppressed by fixing the center of the pot, which has a higher center of gravity, instead of fixing it.

The present invention has been made based on the above knowledge and further studies, and the configuration thereof is as follows.
[1] A device for fixing, from the outside of the carriage, a pan placed on a carriage for transporting a hot melt processing pan via a pair of pan cradles, wherein the pair of 1. A fixing device for a high-temperature melt processing pot, characterized by comprising pot fixing means for sandwiching the pot cradle from both sides of the pot cradle.
[2] In the above [1], the pot fixing means includes two arms that are vertically driven and end portions of the two arms on a frame installed outside the truck. When the arm portion is driven downward from above, the hold portion comes into contact with the pot cradles and sandwiches the pair of pot cradles from both sides to hold the pot. A fixing device for a hot melt processing pot, characterized in that it is fixed.
[3] In the above [1] or [2], the pot cradle has a recess for placing the pot on the top of the pot cradle, and is in contact with the pot of the pot cradle. A fixing device for a hot melt processing pan, characterized in that the surface opposite to the side has a taper that tapers upwardly toward the pan.
[4] A fixing device for a high-temperature melt processing ladle according to [3] above, characterized in that the taper angle θ is 1° to 7°.
[5] In any one of [1] to [4] above, a fixing device for a high-temperature melt processing pot, characterized in that a liner is provided in a portion of the holding portion that comes into contact with the pot cradle.
[6] A carriage for transporting the hot melt processing pot provided with the pair of pot cradles, wherein the pot cradles have a recess for placing the pot on top of the pot cradles. and a surface of the pot cradle opposite to the side in contact with the pot has a taper that slopes upward from below toward the pot for transferring a hot melt processing pot trolley.
[7] A carriage for transporting a hot melt processing ladle according to [6], wherein the angle θ of the taper is 1° to 7°.
[8] A high-temperature melt processing pot mounted on the transport cart and fixed by the fixing device.

The present invention can suppress the generation of swinging force by fixing the upper part of the pan cradle instead of the trolley on which the hot melt processing pan is mounted. In addition, by using an attachment-type liner for the portion of the fixing device that comes into contact with the pan (holding portion, which will be described later), it can be easily replaced even if it wears out.

1 is a schematic plan view showing an example of a whole fixing device for a hot melt processing ladle according to the present invention; FIG. 1 is a schematic front view showing an example of the whole fixing device for a high-temperature melt processing ladle of the present invention; FIG. 1 is a schematic side view showing an example of a whole fixing device for a hot melt processing ladle according to the present invention; FIG. It is a schematic diagram which shows one embodiment (the number of pedestals is one) of the pot fixing means of this invention. FIG. 4 is a schematic diagram showing another embodiment (two pedestals) of the pot fixing means of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows one embodiment of the pot cradle of this invention, (a) is a side view, (b) is a front view.

Next, specific embodiments of the present invention will be described with reference to the drawings.
[Hot melt processing pot]
As a high-temperature melt processing ladle, a typical hot metal ladle will be described below with reference to FIGS.
The hot metal ladle 2 is a container that stores hot metal tapped from a blast furnace while it is being transported to a converter. After receiving hot metal in this hot metal ladle, the hot metal ladle 2 is placed on the truck 1, and hot metal pretreatment such as desulfurization, dephosphorization, and desiliconization is performed on the way of transportation to the converter. Such treatment is carried out by vigorously stirring the hot metal by blowing gas from above the pot. The capacity (weight) of a hot metal ladle in a general steel factory is about 250 to 300 tons.
In the hot metal ladle 2, slag (slag) generated when the hot metal is pretreated is discarded, or when the hot metal is transferred to the converter after being transferred to the converter, the hot metal ladle is tilted to discharge the hot metal. In order to do so, support columns are provided on both sides of the pot to serve as a rotation axis for tilting. At least two supports for placing the hot metal ladle 2 on the ladle holders 3a and 3b provided on the truck 1 are provided on one side of the ladle 2 for stabilization.

[Dolly]
A carriage 1 on which the hot metal ladle 2 is mounted is provided with two ladle cradles 3a and 3b on which the hot metal ladle 2 is placed with an interval of the width of the hot metal ladle 2 therebetween. Moreover, a plurality of wheels are provided for mounting the pot 2 and moving it between processing facilities. The shape of the carriage 1 and the number of wheels are not particularly limited.

[Pot holder]
The pair of pot cradles 3a, 3b are installed on the carriage 1 as described above, and are for placing the pot 2 thereon. The pot holders 3a and 3b come into contact with the sides of the pot to fix the pot 2 itself by sandwiching it with a pot fixing means which will be described later. In order for the hold portions 6a and 6b, which will be described later, to move downward from above to sandwich and push in the pot holders 3a and 3b, as shown in FIG. A taper is provided on the surface on the side opposite to the side to be bent. The taper angle θ is preferably 1° to 7°. This is because, if θ is less than 1°, it is difficult to convert the downward force into a clamping force as in the case of a vertical surface. This is because if θ exceeds 7°, the angle is too large and the resistance during descent becomes too large. More preferably, it is 1.3 to 5.5°.

As shown in FIG. 6(b), the upper surface of the pot holder 3b is provided with a recess 8 for placing a pot thereon. The shape of the recessed portion 8 is not particularly limited as long as it can receive a support provided on the pot side. In order to prevent the pot 2 from tilting when the pot 2 is placed, it is preferable to provide at least two pillars on one side. In that case, at least two recessed portions 8 are provided on each side.

[Pan fixing means]
A pot fixing means for fixing the hot melt processing pot via the pot holder is installed outside the truck 1 and is composed of a frame 4, arm portions 5a and 5b, and holder portions 6a and 6b. ing.

The pedestal 4 serves as a base for supporting the arm portions 5a and 5b and the hold portions 6a and 6b which serve as arms for holding the pan 2 therebetween. The structure of the pedestal 4 is not particularly limited as long as it is a structure capable of installing the two arm portions 5a and 5b. As shown in FIG. 5, the arm units 5a and 5b may be provided on two pedestals 4a and 4b that are separated from each other, but as shown in FIG. By attaching 5a and 5b, the space for installing the frame 4 can be reduced, which is preferable.

The arm portions 5a and 5b are portions corresponding to supports connected to holding portions 6a and 6b for holding the pot 2 from both sides in order to fix the pot 2 from the mount 4. As shown in FIG. The arms 5a and 5b can be driven vertically by an elevating means (not shown) provided on the base 4. As shown in FIG. The lifting means may be, for example, a mechanism for hoisting with a winch through a wire between the ends of the arms 5a, 5b or the holders 6a, 6b and the pedestal 4, and the arms 5a, 5b are driven using hydraulic cylinders. A mechanism is fine.

The hold portions 6a and 6b are attached to the tips of the arm portions 5a and 5b in a substantially horizontal state. By descending downward from the pedestal and pinching the sides of the pot cradles 3a and 3b from both sides, the pot cradles 3a and 3b come into contact with the pot 2 and the pot 2 can be fixed.

It is preferable to provide liners 7a, 7b made of a material having good abrasion resistance at the portions of the holding portions 6a, 6b that come into contact with the pot holders 3a, 3b. For example, it is preferable to use SS400, which is a general structural rolled steel material, or S45C, which has higher strength and excellent wear resistance. Furthermore, it is preferable that the liners 7a and 7b be of an attachment type that is easy to install and easy to replace.

One of the two pot fixing means will be described below with reference to FIG.

The pot cradles 3a and 3b are in contact with the tips of the holding portions 6a and 6b of the pot fixing means. The pot holders 3a and 3b are tapered θ. For example, for a height of 1600 mm (distance downward from the top of the pan cradle), the inclination (reduction) width is 40 mm and θ is 1.432°.

The side view of FIG. 3 shows one side (4, 5b, 6b) of the pot fixing means. In FIG. 3, the arm portion 5b has a structure in which the arm portion 5b can be vertically driven by a hydraulic cylinder (not shown) provided on the base 4. As shown in FIG.

Since the size of the pot 2 and the installation positions of the pot holders 3a and 3b are fixed, the interval between the hold portions 6a and 6b is maintained at the initially set interval, but the interval can be changed. Thus, it is preferable to provide a structure for driving the arm portions 5a and 5b in the horizontal direction.

Next, how to fix the pan will be explained.
Until the truck 1 on which the pot 2 is mounted stops at a specified position, the arm portion 5b is retracted to a position where it does not come into contact with the upper pot or the like. The part 5b is lowered. When the arm portion 5b is lowered, the holding portion 6b at the tip comes into contact with the pot holder 3b. A liner 7b made of SS400 is attached to the portion of the hold portion 6b that contacts the pot holder 3b for reinforcement. This liner 7b is an attachment type that can be easily replaced.

One side of the pot cradle 3b (the side opposite to the pot side) is tapered as described above. will do.

Similarly, the holding portion 6a of the pot cradle 3a on the opposite side descends and pushes the pot cradle 3a into contact with the pot 2. As a result, the pot 2 is sandwiched between the holding portions 6a and 6b from both sides. and the pan 2 can be firmly fixed.

An example carried out in hot metal pretreatment will be described.
First, prior to the installation of the pot fixing device of the present invention, the conventional method (method of fixing with the truck fixing device installed on the rail at the position where the truck stops) was used for hot metal pretreatment. The number of times of processing was 70 times/day, and the trouble that the rail-mounted fixing device was damaged due to the impact of the bogie rocking occurred 6 times/year (about once in February). On the other hand, in the case where the ladle fixing device of the present invention was installed and similar pretreatment of hot metal was performed, the ladle fixing device was not damaged even by the impact of the swinging of the truck, and the operation troubles were reduced. As a result, the number of times of treatment increased by about 30 times/month compared to the number of times of the conventional method, and the number of failures was 0 in 15 months.

As described above, according to the present invention, it has been confirmed that troubles do not occur for a long period of time, and that the pot fixing device of the present invention exhibits excellent effects.

1 trolley 2 pot (hot metal pot, hot melt processing pot)
3a, 3b pot holders 4, 4a, 4b mounts 5a, 5b arm portions 6a, 6b holder portions 7a, 7b liner 8 recessed portion

Claims (8)

A device for fixing, from the outside of a truck for transferring a hot melt processing pot, a pot placed via a pair of pot cradles on the cart, said pair of pot cradles. A fixing device for a hot melt processing pot, characterized by comprising pot fixing means for sandwiching the pot cradle from both sides. The pot fixing means consists of two arms that are driven vertically on a frame installed outside the truck, and holding portions that connect to the ends of the two arms, 2. When the arm is driven downward from above, the hold portion comes into contact with the pot cradles and clamps the pair of pot cradles from both sides to fix the pot. 2. A fixing device for a hot melt processing pan according to claim 1. The pot cradle has a recess for placing the pot on the top of the pot cradle, and the surface of the pot cradle opposite to the side that contacts the pot faces upward from below. 3. A fixing device for a hot melt processing ladle according to claim 1 or 2, characterized in that it has a taper sloping toward said ladle. 4. The fixing device for a hot melt processing pot according to claim 3, wherein the taper angle θ is 1° to 7°. 5. A fixing device for a hot melt processing ladle according to any one of claims 1 to 4, characterized in that a liner is provided in a portion of said holding part that contacts said ladle pedestal. A carriage for transporting the hot melt processing pot comprising the pair of pot cradles, the pot cradles having a recess for placing the pot on top of the pot cradles. 2. A carriage for transporting hot melt processing pans, wherein a surface of the pan cradle opposite to the side in contact with the pan has a taper that slopes upward from below toward the pan. The carriage for transferring hot melt processing pans according to claim 6, characterized in that the taper angle θ is between 1° and 7°. A high-temperature melt processing pot mounted on the transport cart and fixed by the fixing device.

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