JP2002075634A - Electrode supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to safely and efficiently perform an supply of a graphite electrode to an electrode step addition device installed at upstairs by a worker. SOLUTION: This is an electrode supplying device 1 wherein the new graphite electrode 2 is supplied to the electrode step addition device 3 for replenishing new graphite electrodes 2 on the existing graphite electrode 2 mounted on an electric type fusion furnace which molten treats a molten material, and the electrode supplying device 1 is constituted of an electrode stock device 4 which is installed in downstairs F1, stocks plural graphite electrodes 2 and sends out them one by one, an electrode lifter 5 which is installed between the downstairs F1 and the upstairs F2, and which receives the graphite electrode 2 sent out from the electrode stock device 4 and transfers it from the downstairs F1 to the upstairs F2, and an electrode delivery device 6 which is installed in the upstairs F2, receives and stocks the graphite electrode 2 transferred to the upstairs F2 by the electrode lifter 5 and sends out the stocked graphite electrodes 2 one by one to the electrode step addition device 3 installed in the upstairs F2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric system for melting incinerated ash and fly ash discharged from a refuse incineration facility for incinerating municipal waste and industrial waste with electric energy. The present invention relates to an electrode supply device for graphite electrodes used in a melting furnace, and in particular to a new electrode extension device for adding a new graphite electrode to the existing graphite electrode installed on the floor and installed in the electric melting furnace. The present invention relates to an electrode supply device for supplying a graphite electrode.

[0002]

2. Description of the Related Art Conventionally, an artificial graphite column has been used to melt incinerated ash and fly ash discharged from a refuse incineration facility for incinerating municipal waste and industrial waste. Electric melting furnaces such as plasma melting furnaces, arc melting furnaces, and electric resistance furnaces using electrodes (hereinafter referred to as graphite electrodes) are widely used.

[0003] In an electric melting furnace using a graphite electrode, the graphite electrode is gradually consumed and shortened by the operation of the furnace. Therefore, a new graphite electrode is installed near the electric melting furnace. The new graphite electrode is supplied to the apparatus, and the new graphite electrode is successively added to the existing graphite electrode installed in the electric melting furnace by the electrode filling device.

When an electrode extension device for automatically adding a new graphite electrode to an existing graphite electrode of an electric melting furnace is installed on a floor, the graphite electrode is considerably heavy. Thus, the graphite electrode is supplied to the electrode extension device. That is, as shown in FIG. 4, an operator first supplies a plurality (about 3 to 5) of the graphite electrodes 30 to the wire rope 32 at the position F1 downstairs, as shown in FIG. Then, the bundled graphite electrodes 30 are lifted by the crane 33 to the upper floor F2 and moved to a predetermined position.
The graphite electrode 30 was set on the electrode dispensing device 34 of the electrode extension device 31 at two positions.

[0005]

However, in the above-described operation of supplying the graphite electrode 30, the crane equipment for lifting the graphite electrode 30 from the lower floor F1 to the upper floor F2 is required, so that the equipment cost rises. In addition to the above, there is a problem that it is necessary to perform dangerous work. In particular, in the supply operation of the graphite electrode 30, the graphite electrode 3
In the lifting operation of 0, the extremely heavy graphite electrode 30 is lifted, so that the danger becomes extremely high. Further, since the plurality of graphite electrodes 30 are bundled and lifted by the crane 33, a slinging operation and a lifting operation on the downstairs F1 are required. Needless to say, it was also necessary to set the graphite electrode 30 suspended on the floor F2 to the electrode discharging device 34 of the electrode extension device 31. Thus, the conventional graphite electrode 3
In the supply work of 0, the number of work processes increases, so the whole work takes time and the workability is remarkably deteriorated. In addition, at least two workers are required, and the labor cost rises. There was a problem.

[0006] The present invention has been made in view of such problems, and an object of the present invention is to provide a single worker to supply graphite electrodes to an electrode extension device installed on a floor. It is an object of the present invention to provide an electrode supply device which can be performed efficiently in a short time.

[0007]

In order to achieve the above-mentioned object, the present invention provides a method for adding a new graphite electrode to an existing graphite electrode installed in an electric melting furnace for melting and processing a material to be melted. An electrode supply device for supplying a new graphite electrode to an electrode extension device, wherein the electrode supply device is installed downstairs, an electrode stock device that stocks a plurality of graphite electrodes and sends them out to one electrode, and a downstairs. An electrode lifter that is installed between the floor and the floor, receives the graphite electrode sent from the electrode stock device and transfers it from the lower floor to the upper floor,
An electrode dispensing device that is installed on the floor and receives and stocks the graphite electrode transferred to the floor by the electrode lifter, and sends out the stock graphite electrode to the electrode extension device installed on the floor one by one. It is characterized by having.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show an electrode supply device 1 according to an embodiment of the present invention. The electrode supply device 1 includes incineration ash discharged from a refuse incineration facility for incinerating municipal waste and industrial waste. It is installed near an electric melting furnace (not shown) such as a plasma melting furnace, arc melting furnace, or electric resistance furnace for melting and processing objects to be melted such as fly ash, and is installed in the electric melting furnace. The new graphite electrode 2 is supplied to an electrode extension device 3 for connecting and adding a new graphite electrode 2 to the graphite electrode 2.

The graphite electrode 2 used in the electric melting furnace has a cylindrical graphite electrode 2 having the same tapered female screw holes on both end surfaces, and a tapered female screw hole on one end surface. There is a cylindrical graphite electrode 2 having a tapered male screw portion screwed into the female screw hole on the other end surface. The connection of the graphite electrode 2 having female screw holes on both end surfaces is performed by a tapered nipple having a male screw formed on the outer peripheral surface to be screwed into the female screw hole of the graphite electrode 2. This nipple is formed of graphite of the same material as the graphite electrode 2, and one half in the axial direction is screwed into the female screw hole of one graphite electrode 2 and the other half is screwed into the female screw hole of the other graphite electrode 2. It has become so.
The graphite electrode 2 having a female screw hole and a male screw portion is connected by screwing a male screw portion of another graphite electrode 2 into the female screw hole of the graphite electrode 2.

The electrode connecting device 3 is usually installed on a floor, and connects a new graphite electrode 2 to an upper end portion of an existing graphite electrode 2 vertically mounted in an electric melting furnace to join. It adds. That is, the electrode extension device 3 is located on the downstairs F1.
, The graphite electrode 2 conveyed to the upper floor F2 and placed in the horizontal position is held in the horizontal position, the posture is changed to the vertical position, and then the new graphite electrode 2 is changed to the vertical position.
Is moved above the existing graphite electrode 2 of the electric melting furnace, the two graphite electrodes 2 and 2 are aligned, and then the new graphite electrode 2 is rotated to lower the lower end of the new graphite electrode 2 to the existing graphite electrode 2. The graphite electrode 2 is added by screwing and connecting to the upper end of the electrode 2. The electrode extension device 3 has the same structure as a conventionally known one,
Here, the detailed description is omitted.

The electrode supply device 1 according to the embodiment of the present invention includes an electrode stock device 4 installed on the lower floor F1.
And an electrode lifter 5 installed between the downstairs F1 and F2, and an electrode dispensing device 6 installed on the upstairs F2. A plurality of graphite electrodes 2 are stocked at the downstairs F1. These are transferred to the upper floor F2, and the graphite electrodes 2 transferred to the upper floor F2 are stocked again at the upper floor F2. Then, they are transferred to the electrode extension device 3 installed at the single floor F2. They are supplied sequentially.

The electrode stock apparatus 4 stocks a plurality of graphite electrodes 2 in a horizontal position and in a parallel state, and sends out the stocked graphite electrodes 2 to an electrode lifter 5 one by one. That is, as shown in FIG. 1, the electrode stock device 4 is installed on the floor of the downstairs F <b> 1, and stores a plurality of graphite electrodes 2 in a sideways posture and in a side-by-side state in an inclined manner. The graphite electrode 2 which is provided on the low side (the right side of the cradle 7 shown in FIG. 1) and rolls from the high side to the low side on the cradle 7 is received at a predetermined position and positioned. And a delivery mechanism 8 for sending the graphite electrode 2 on the receiving table 7 to the single electrode lifter 5.

More specifically, the cradle 7 includes a plurality of support legs 9 erected at regular intervals on the floor surface of the downstairs F1, and a pair of parallel rails supported by the support legs 9 in an inclined posture. The graphite electrode 2 placed in a horizontal position on the high place side of the rail 10 rolls on the rail 10 toward the low place by gravity. Side plates 11 for guiding the graphite electrode 2 rolling on the rail 10 to prevent the graphite electrode 2 from falling off the rail 10 are provided on both sides of the rail 10.
Is provided.

On the other hand, the delivery mechanism 8 includes a hydraulic cylinder 12 (air cylinder) provided on the lower side of the pedestal 7 and a rail 10 of the pedestal 7 operated by the hydraulic cylinder 12.
And a hook 13 for receiving and sending out the graphite electrode 2 which rolls from the high place side to the low place side. As the delivery mechanism 8, for example, one having a structure shown in FIGS. 3A and 3B is used. The delivery mechanism 8 shown in FIG. 3A swings a hook 13 having a pair of front and rear hook claws 13a and 13b by a hydraulic cylinder 12, and the hook 13
The receiving and sending out of the graphite electrode 2 can be performed by alternately protruding the pair of engaging claws 13a and 13b above the rail 10 of the receiving base 7 from above. The delivery mechanism 8 shown in FIG.
3c and a pair of front and rear pins 13 connected to the link 13c
d, 13e is swung by the fluid pressure cylinder 12, and a pair of pins 13d, 1
By alternately protruding 3e above the rails 10 of the receiving table 7, the graphite electrode 2 can be received and sent out.

The electrode lifter 5 receives the graphite electrode 2 in a horizontal position sent from the electrode stocker 4 one by one, and sequentially transfers the graphite electrode 2 to the upper floor F2, and the electrode dispenser installed on the upper floor F2. 6 That is, as shown in FIGS. 1 and 2, the electrode lifter 5 is installed in a standing posture on the floor surface of the downstairs F1 and at a position near the lower side of the cradle 7 of the electrode stock device 4, and the upper end is on the floor. A vertical frame 14 located therein; an opposing drive sprocket 15 rotatably disposed at an upper position of the frame 14 at a fixed interval; and a rotatable at a lower position of the frame 14 at a fixed interval , A pair of opposed endless chains 17 wound around the two driving sprockets 15 and the two driven sprockets 16, respectively, and attached to the two chains 17 in an opposed manner, Graphite electrode 2 sent from electrode stock device 4
Two arms 18 that receive and support in a horizontal posture,
A drive unit 19 such as a motor for rotating the drive sprocket 15 forward and reverse to move two arms 18 attached to the chain 17 up and down. Also, two arms 1
Reference numeral 8 denotes a receiving position (solid line position in FIG. 1) for receiving the graphite electrode 2 in a horizontal attitude sent from the electrode stock device 4 by the drive unit 19 so as to face the rail 10 of the cradle 7 of the electrode stock device 4. Synchronous with a delivery position (a dashed line position in FIG. 1) where the graphite electrode 2 transferred to the floor F2 facing the rail 23 of the cradle 20 of the electrode dispensing device 6 described below is transferred to the electrode dispensing device 6. It moves up and down.

The electrode dispensing device 6 receives the graphite electrode 2 transferred to the floor F2 by the electrode lifter 5 and stocks the graphite electrode 2 in a horizontal position and in a side-by-side state. One of the electrodes is sent to the electrode extension device 3. That is, as shown in FIG. 1 and FIG. 2, the electrode dispensing device 6 is installed on the floor of the floor F2 and has an inclined receiving base 20 that stocks a plurality of graphite electrodes 2 in a sideways posture and in a parallel state. Is provided on the lower side of the cradle 20 (the left side of the cradle 20 shown in FIG. 1),
The graphite electrode 2 rolling from the high place side to the low place side on the cradle 20 is received and positioned at a predetermined position, and the graphite electrode 2 on the cradle 20 is moved to a position directly below the single electrode lifter 5. And a sending-out mechanism 21 for sending out.
It has the same structure as the above-described electrode stock device 4.

Specifically, the cradle 20 is located on the upper floor F2.
A plurality of support legs 22 erected at regular intervals on the floor surface of
A pair of parallel rails 23 supported in an inclined posture by the support legs 22, and the graphite electrode 2 in a horizontal posture, which is passed from the electrode lifter 5 to the high side of the rail 23, moves down on the rail 23 by gravity. It rolls toward the side. In addition, a high-side end portion 23a of the rail 23 of the cradle 20 is provided.
Is configured to be swingable up and down.
A horizontal receiving position (indicated by a dashed line in FIG. 1) located below the arm 18 at the delivery position of the electrode lifter 5, and the arm 18 of the electrode lifter 5 It swings in the vertical direction over a vertical retreat position (solid line position in FIG. 1) that allows the passage of the graphite electrode 2 supported by the above.
Further, the graphite electrode 2 sent out by the sending-out mechanism 21 is attached to the rail 23 at the lower end of the rail 23 of the cradle 20.
A stopper 24 is provided to prevent the rail from falling from
A side plate 25 is provided to guide the graphite electrode 2 rolling on the rail 23 to prevent the graphite electrode 2 from falling off the rail 23.

On the other hand, the delivery mechanism 21 includes a fluid pressure cylinder 26 (air cylinder) provided on the lower side of the cradle 20;
It comprises a hook 27 which receives and sends out the graphite electrode 2 which is operated by the fluid pressure cylinder 26 and rolls from the high side to the low side on the rail 23 of the cradle 20. Since the delivery mechanism 21 has the same structure as the delivery mechanism 8 of the electrode stock device 4 shown in FIGS. 3A and 3B, a detailed description thereof is omitted here.

Next, a case in which a new graphite electrode 2 is supplied to the electrode extension device 3 installed on the floor F2 using the above-described electrode supply device 1 will be described. Electrode extension device 3
The new graphite electrode 2 supplied to the electrode is bundled by a worker at a position on the downstairs F1 with a plurality of (approximately 3 to 5) wire ropes or the like at the position of the downstairs F1. It is conveyed to the high place side of the receiving stand 7 of the stock apparatus 4.

The graphite electrode 2 conveyed to a high place of the cradle 7 of the electrode stock device 4 is unbundled by an operator and placed on the rail 10 of the cradle 7 of the single electrode stock device 5. . At this time, the graphite electrode 2 rolls from the high place side to the low place side on the rail 10 because the rail 10 of the cradle 7 is inclined. Further, the leading graphite electrode 2 rolled down to the lower side of the rail 10 is attached to the hook 1 of the delivery mechanism 8.
3 is received at a predetermined position and positioned.
Further, since the leading graphite electrode 2 is received and positioned at the lower side of the rail 10, the subsequent graphite electrode 2 is sequentially rolled on the rail 10 from the higher side to the lower side to go to the receiving table. 7 are stocked on the rails 10 in a sideways posture and side by side.

The graphite electrode 2 stocked in the electrode stock device 4 is sent out from the leading graphite electrode 2 to the electrode lifter 5 side by a single sending-out mechanism 8, and the receiving position of the electrode lifter 5 (solid line position in FIG. 1). ) Is supported by the arm 18 in the horizontal position.

The graphite electrode 2 is connected to the arm 18 of the electrode lifter 5.
, The arm 18 of the electrode lifter 5 rises from the receiving position to the receiving position (the position indicated by the one-dot chain line in FIG. 1). As a result, the graphite electrode 2 supported by the arm 18 is transferred from the downstairs F1 to the upstairs F2 in a horizontal orientation. At this time, the rail 2 of the cradle 20 of the electrode discharging device 6
3 is a retracted position (solid line position in FIG. 1).
The arm 18 and the graphite electrode 2 that rise from the lower floor F1 to the upper floor F2 do not interfere with each other.

When the arm 18 of the electrode lifter 5 rises to the transfer position, the high-side end 23a of the rail 23 of the receiving stand 20 of the electrode dispensing device 6 swings from the retracted position to the receiving position (the dashed line position in FIG. 1). While moving, the arm 18 at the transfer position is lowered to the receiving position. As a result, the graphite electrode 2 supported by the arm 18 in the horizontal position is connected to the high-side end 2 of the rail 23 at the receiving position.
3a, rolls on the rail 23 from a high place to a low place, and is received and positioned at a predetermined position by a hook 27 of the delivery mechanism 21.

In the following, the graphite electrode 2 similarly sent out from the electrode stocker 4 is transferred by the electrode lifter 5 from the lower floor F1 to the upper floor F2, and is transferred to the rail 23 of the cradle 20 of the electrode discharging device 6. Handed over. The subsequent graphite electrode 2 delivered to the rail 23 of the cradle 20 is positioned on the rail 23 from the high side to the low side because the leading graphite electrode 2 is received and positioned at the low side of the rail 23. It rolls to the side and is stocked on the rail 23 of the cradle 20 in a sideways posture and side by side.

The graphite electrode 2 stocked in the electrode dispensing device 6 is the same as the existing graphite electrode 2 installed in the electric melting furnace.
Is sent out to a position immediately below the electrode extension device 3 by the sending-out mechanism 21 according to the degree of wear of the electrode.

In the above embodiment, the graphite electrode 2 is supplied to an electric melting furnace such as a plasma melting furnace, an arc melting furnace, and an electric resistance furnace by using the electrode supply device 1. The electrode supply device 1 of the present invention can be applied to any type of melting furnace as long as the melting furnace uses the graphite electrode 2. For example, the present invention can be applied to the supply of graphite electrodes 2 such as a scrap melting furnace or an alloy melting furnace in the steelmaking industry using the graphite electrodes 2.

In the above embodiment, both the electrode stocking device 4 and the electrode dispensing device 6 stock the graphite electrodes 2 in a sideways posture and in a parallel state, and send out the stocked graphite electrodes 2 one by one. Configuration, but the graphite electrode 2
May be stored in a stacked state, and these may be sent out one by one. Further, the delivery mechanisms 8 and 21 of the electrode stock device 4 and the electrode dispensing device 6 are both constituted by the fluid pressure cylinders 12 and 26 and the hooks 13 and 27,
The delivery mechanisms 8 and 21 are not limited to those according to the above-described embodiment, but may be any one that can set and position the graphite electrode 2 at a predetermined position and send out one graphite electrode 2 to one. Any shape and structure may be used.

In the above embodiment, the arm 18 of the electrode lifter 5 is moved up and down by chain transmission. However, the arm 18 is moved up and down by using an electric chain block, a fixed hoist, or the like. May be
Alternatively, the electrode lifter 5 may have a continuously rotating bucket conveyor type structure.

[0029]

As is clear from the above description, the electrode supply apparatus of the present invention stocks a plurality of new graphite electrodes by an electrode stock apparatus installed downstairs, and sends them out to the electrode lifter one by one. A configuration in which graphite electrodes are sequentially transferred from the lower floor to the upper floor by the electrode lifter and transferred to the electrode dispensing device, and the graphite electrodes are again stocked by the electrode dispensing device and supplied to the one-piece electrode connecting device. And As a result, the electrode supply device of the present invention eliminates the need for crane equipment for lifting the graphite electrode from the lower floor to the upper floor, eliminates highly dangerous work, and can supply the graphite electrode safely. Further, the use of the electrode supply device of the present invention eliminates the need for crane equipment, and eliminates the need for slinging work or lifting work downstairs or setting graphite electrodes to the electrode dispensing apparatus upstairs. As a result, a slinging worker or a worker on the floor becomes unnecessary, and the supply of the graphite electrode to the electrode extension device can be performed safely and efficiently by one worker. Needless to say, a single worker can supply the graphite electrode, thereby significantly reducing labor costs. Further, the electrode supply device of the present invention is provided with an electrode stocking device for stocking a plurality of black smoke electrodes downstairs and an electrode dispensing device for stocking a plurality of black smoke electrodes upstairs. ,
The space for storing the graphite electrode can be adjusted upstairs and downstairs, which facilitates the arrangement of the equipment.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an electrode supply device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of an electrode supply device from which an electrode stock device is omitted.

FIG. 3 is a schematic view showing an example of a delivery mechanism of the electrode stock device.

FIG. 4 is a schematic explanatory view showing a conventional work process of supplying a graphite electrode to an electrode extension device by a crane.

[Explanation of symbols]

1 is an electrode supply device, 2 is a graphite electrode, 3 is an electrode extension device,
4 is an electrode stocker, 5 is an electrode lifter, 6 is an electrode dispenser, F1 is downstairs, F2 is upstairs.

Claims (1)

[Claims] An electrode supply device for supplying a new graphite electrode to an electrode extension device for adding a new graphite electrode to an existing graphite electrode attached to an electric melting furnace for melting and processing a material to be melted. The electrode supply device was installed downstairs, an electrode stock device that stocks a plurality of graphite electrodes and sends them out to one electrode, and an electrode stock device that was installed between the downstairs and the upstairs and was sent out from the electrode stock device. An electrode lifter that receives the graphite electrode and transfers it from the lower floor to the upper floor,
An electrode dispensing device that is installed on the floor and receives and stocks the graphite electrode transferred to the floor by the electrode lifter, and sends out the stock graphite electrode to the electrode extension device installed on the floor one by one. An electrode supply device, comprising: