JPH07180967A - Device for feeding closing material at molten steel port - Google Patents

Abstract

PURPOSE:To perform an automatic feeding of closing material and save energy by a method wherein the closing material such as sand and the like is supplied from a storing hopper into a feeding hopper, the feeding hopper is rotated vertically and moved above a molten steel port and at the same time its inner side near the molten steel port is monitored by a monitoring means. CONSTITUTION:In order to feed closing material, sand 42, for example, into a molten steel port of an electric furnace 2, at first, a predetermined amount of sand 42 is cut out by a cutting-out device 39 of a storing hopper 40 and at the same time a supplying shoot 38 is extended to supply the sand 42 into the feeding hopper 33. Then, the supplying shoot 38 is shortened and a turning arm 32 is turned in an arcular motion vertically toward the moten steel port through a gear reducer 37 under an operation of a motor 36 and the arm is moved just above a feeding pipe seat 301 just above the molten steel port. Subsequently, a cut gage 34 fixed to the lower end of the feeding hopper 33 is released to feed the sand 42 into the molten steel port and at the same time a feeding condition of the sand 42 is confirmed by the monitoring camera 35. After this operation, the turning arm 32 is returned back to the supplying shoot 38 and the supplying shoot 38 is extended again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plugging device for feeding a steel outlet of an electric furnace or the like. This relates to a charging device that can be charged into a steel mouth.

Although the present invention will be described below focusing on electric furnace operation, it can be applied to general metallurgical furnace operations other than electric furnace operation.

Further, although sand is usually used as the occluding material,
Other occluding materials can be used.

[0004]

2. Description of the Related Art Generally, the tap hole of an electric furnace is filled with sand as follows.

As shown in FIG. 5, sand for one time is received from the auxiliary raw material addition equipment via the dedicated sand supply shunt 1 into the sand feeding hopper 3 (the position where this is received is shown by the dotted line in FIG. 5). Then, the hopper 3 is swung by the arm 4 at the horizontal level in the direction of the arrow and moved to a position just above the tapping hole (this moving position is shown by a solid line in FIG. 5). At this moving position, a gate (not shown) at the lower end of the sand feeding hopper 3 is opened to feed sand into the tap hole 1 of the electric furnace 2 as a closing material. Reference numeral 21 is an upper deck on the tap hole.

In addition to the electric furnace, the charging device for the clogging material such as sand is as shown in Japanese Utility Model Publication No. 56-91668.
It is also used in ladle.

That is, as shown in FIG.
In the sand throwing apparatus described in Japanese Patent Publication No.-91668, a sand storage hopper 5, a shoe 7, and a funnel-shaped sand receiver 8 are rotatably supported by a swivel arm 6 around a column 7. The sand receiver 8 is supported by a wire 9 so as to be vertically movable. Therefore, the sand 10 is thrown into the pouring nozzle 11 of the ladle by vertically moving the funnel-shaped sand receiver 8.

[0008]

According to the method shown in FIG.
Since the sand turning hopper 3 has a wide horizontal swing range, when working on the maintenance deck 21 provided around the tap hole or when going to the deck using the stairs 22 and the passage 23,
Many are included in the turning range, which is dangerous.
Therefore, even if the upper deck 21 has a large space, it is not always possible to effectively use the deck and the passage.

Further, it is dangerous that the sand feeding hopper 3 malfunctions during maintenance work.

Further, when the sand cannot be successfully put into the tap hole, the worker needs to go to the upper deck 21 above the tap hole and adjust the position of the sand feeding hopper 3. Therefore, until the sand is put into the sand input hopper 3 again from the sand supply shoe 1 and swirled, and the position of the sand is adjusted and the sand is input to the steel tap, the work in the high heat atmosphere can be performed. As it continues, the workload of workers is high.

Further, the actual construction of Japanese Utility Model Laid-Open No. 56-91668 shown in FIG.
In the sand throwing device shown in the publication, since the sand storage hopper 5 horizontally swivels, there is a safety problem during maintenance work as in the case shown in FIG. It is difficult to apply it to the tap hole of an electric furnace that cannot lower the vessel 8.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems. Specifically, sand or the like sent from a storage hopper for an occluding material such as sand is received by a receiving hopper such as sand. While the hopper is configured to rotate vertically,
A surveillance camera is attached near the tap hole where sand etc. is thrown, and in this way the throwing sand etc. to the tap hole can be automatically performed and this throw can be confirmed by the surveillance camera. Proposes a device for feeding a clogging material such as sand to the tap hole that can perform a series of sand feeding operations without going to the tap hole at all.

Further, the storage hopper for sand or the like is configured to be movable up and down, and the work for receiving sand or the like can be carried out on the work deck in front of the furnace. To do.

The structure and operation of these means will be described more concretely with reference to the drawings.

FIG. 1 is a front view of a charging device according to one embodiment of the present invention, FIG. 2 is a plan view of the charging device shown in FIG. 1, and FIG. 3 is shown in FIGS. FIG. 4 is a vertical cross-sectional view of a part of the charging device, and FIG. 4 is a layout view of an example of a lifting device for a storage hopper for sand and the like.

First, referring to FIG. 1, FIG. 2 and FIG.
Reference numeral 2 indicates an electric furnace similar to that of the conventional example, but a tap hole indicates a reference numeral 30 and an upper deck indicates a reference numeral 31. The passages and stairs are indicated by reference numerals 23 and 22 as in the conventional example.

On the upper deck 31 of the tap hole 30 (see FIG. 3) of the electric furnace 2, an upward and downward circular arc movement, that is,
A swivel arm 32 that swivels vertically is provided, and a hopper 33 for throwing in sand or the like is attached to the tip of this swivel arm 32.

A cut gate 34 is provided in the lower part of the charging hopper 33, and when the cut gate 34 is opened, sand or the like is dropped and can be charged into the tap hole 30.

A surveillance camera 35 is attached at a position close to the tap hole 30, that is, at the side.

Although the vertical turning mechanism of the charging hopper 33 can be constructed in any way, it is preferably constructed as follows.

That is, the feeding hopper 33 is provided with the swivel arm 3
Pivotally attached to one end of the two, the pivot arm 32 usually comprises a pair of parallel links 321,322. With such a parallel link mechanism, the throw-in hopper 32 can stably rotate in the vertical direction without tilting during turning.

The other end of the turning arm 32 is pivotally attached to a motor 36 and a speed reducer 37. Therefore, when the motor 36 is driven, the swivel arm 32 swivels up and down via the speed reducer 37, and the feeding hopper 33 is positioned on the tap hole 30.

Further, in order to supply a blocking material such as sand to the charging hopper 33, a supply shutout 38 for sand or the like is provided.
The supply shoe 38 is configured to be expandable and contractible, and a cutting device 39 for controlling the supply amount of sand and the like and a storage hopper 40 are sequentially connected to the rear end of the supply shoe 38.

In the charging device configured as described above, the storage hopper 40 for sand or the like can be configured to be movable up and down as shown in FIG.

The storage hopper 40 for sand and the like is held by an elevating device 41, which comprises an elevating carriage 42, a guide rail 43, a guide roller 44, a towing rope 45, and an elevating motor 46. Then, the storage hopper 40 is charged with a blocking material such as sand by the bag 47 at the upper position. That is, the guide rail 43 is arranged so as to be inclined. An elevating carriage 42 is arranged so as to be movable along the guide rail 43, the elevating carriage 42 is caused to travel by a towing rope 45, and the towing rope 45 is towed by an ascending / descending motor 46. In other words, the lift truck 42 is provided between the guide rails 43.
And tow rope 45 on top of this lift truck 42.
, And is connected to an elevating motor 46, for example, an electric winch via an upper guide rail 43.

The present invention will be described below with reference to operation modes of the charging device having the above structure.

First, referring to FIGS. 1 to 4, the storage hopper 4
Cut out a predetermined amount of sand 42 using the cutting device 39 of 0,
Extend the supply shoe 38 and insert sand 4 into the input hopper 33.
Supply 2.

Next, after shrinking the supply shoe 38,
And the speed reducer 37 are actuated to move the swivel arm 32 in a circular arc up and down to the tap hole side, and move it to just above the throwing pipe seat 301 immediately above the tap hole 30, and the throwing hopper 33. The cut gate 34 attached to the lower end of the sand is opened, and the sand 42 is charged into the steel tap hole 30, and the monitoring camera 35 is used to check the sand charging condition.

Next, the motor 36 and the speed reducer 37 are actuated to return the swing arm 32 to the side of the supply shoe 38, and the shunt 38 is extended to insert the sand 42 to be introduced next. Three
Put in 3.

Thereafter, the feeding of sand or the like is repeated in the same order.

When the sand cannot be thrown into the tap hole 30 successfully, the sand throwing operation is repeated again and the tapping is done while looking at the monitor screen (not shown) of the surveillance camera 35 provided in the operation room. Finely adjust the position of the feeding hopper 33 on the sand feeding pipe seat 301 of the mouth 30 from the operation room by lever operation to remove the sand 4
Turn on 2 again. It is confirmed using the surveillance camera 35 whether or not the sand has entered the tap hole 30 successfully, and the next operation is performed.

When the storage hopper 40 can be raised and lowered, the hopper 40 is lowered to the work floor 48 in front of the furnace, and
The back 47 is hopper 40 by a clift or the like (not shown).
The sand 42 is received in the hopper 40 by the lifting operation. After the receiving work is completed, the hopper 40 is pulled up by the motor 46 to move the hopper 40 to the upper end of the supply shoe 38 to prepare for the next supply of sand 42. Of course, at this position, a mechanical stopper (not shown) is inserted to prevent the hopper 42 from falling.

In the above description, the introduction of sand into the tap hole of the electric furnace has been described, but the present invention is not limited to this, and a filler such as sand is introduced into the tap hole of another metallurgical furnace. Applicable even when.

[0034]

As described in detail above, the throwing apparatus according to the present invention cuts out a predetermined amount of sand from the storage hopper such as sand in the work of throwing sand into the tapping mouth, and ejects it by the vertical swing motion of the sand throwing hopper. While moving to just above the steel mouth and throwing sand etc. into the tap hole, the sand feeding status can be confirmed using a surveillance camera. Therefore, 1) Since a series of operations such as sanding can be performed automatically,
Workers do not have to go to the tap hole deck of the electric furnace, so high heat work can be eliminated and labor can be saved. 2) Since the input hopper such as sand swivels vertically in the vertical direction, the plane equipment operating range on the steel tap deck is smaller than that of the conventional horizontal swivel motion, and the deck is wide. It can be used effectively and at the same time maintenance work can be performed safely. 3) Even if sand etc. could not be thrown into the tap hole well, the situation can be seen by the surveillance camera, so the sand throwing operation is repeated again, and the stop position of the throwing hopper is adjusted by the surveillance camera, and sand etc. is thrown in again. Even in this case, the worker does not have to go to the tapping deck because it can. Therefore, the load on the worker can be reduced, and the operator in the central operation room can be made to perform the sand feeding operation.

Further, if the sand storage hopper is configured to be movable up and down, the sand and the like can be received in the work floor in front of the furnace. Therefore, the worker does not have to carry out the work of receiving sand or the like up to the high deck, and the work load can be reduced. Furthermore, since it is not necessary to go to a high place, there is no risk of falling or falling.

[Brief description of drawings]

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

FIG. 2 is a plan view of the charging device shown in FIG.

FIG. 3 is a vertical cross-sectional view of a part of the charging device shown in FIGS. 1 and 2.

FIG. 4 is a layout view of an example of a lifting device for a storage hopper for sand or the like.

FIG. 5 is a front view of one of the conventional charging devices.

FIG. 6 is another side view of the conventional example.

[Explanation of symbols]

 2 Electric furnace 34 Cut gate 30 Steel tap 31 Upper deck 32 Swiveling arm 33 Input hopper 35 Monitoring camera 38 Supply shoot 40 Storage hopper 41 Lifting device 42 Sand

Claims (3)

[Claims] 1. A device for charging a plugging material into a tapping mouth of an electric furnace or the like, wherein the charging hopper receives the plugging material supplied from a storage hopper, and the charging hopper is swung in a vertical direction so as to be above the tapping tap. The plugging device for the tap hole, characterized in that it comprises a moving device for moving to the tap hole and a monitoring means provided near the tap hole for monitoring the inside. 2. An expansion / contraction shoe for expanding and contracting to supply the closing material to the charging hopper is further provided between the storage hopper and the charging hopper.
The device for charging the plugging material into the tap hole described above. 3. The plugging material charging device for the tap hole according to claim 1, further comprising a lifting device for lifting the storage hopper.