JPH0734105A - Slag treatment device and slag treatment method - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the slag overflows from the slag pan, the slag pan is carried out.
(EN) Provided is a slag treatment method which can be carried in and the slag ladle can be replaced at any time during the operation of the furnace. [Structure] A slag ladle 40 is provided at a slag position 34 below the electric furnace 30.
, And the operation is started in a state where the molten metal ladle 40a is also placed in the standby position 44. The slag 70 that has flowed out of the slag outlet 32 of the electric furnace 30 is poured into the slag pan 40, and when the slag 70 stops flowing out, the transfer device 60 is used to lift the slag pan 40 together with the pan stand 50, and the pan receiving position. Drop to 46. Next, the empty slag ladle 40a in the standby position 44 is moved together with the ladle stand 50a to the hoisting and slag position 34 so that the slag in the next process flows in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag treatment apparatus and a slag treatment method for treating slag flowing from a slag outlet of an electric furnace, for example.

[0002]

2. Description of the Related Art The slag flowing out of the slag outlet of an electric furnace is
The slag processing work is carried out by pouring it into a slag ladle placed below the slag outlet, and carrying out the slag ladle with a slag-only dump (hereinafter referred to as "slag dump"). This conventional slag processing work will be described with reference to FIG.

FIG. 3 is an explanatory view showing a conventional slag processing operation. Slag position 1 below the slag outlet 14 of the electric furnace 12
The slag ladle 18 is placed at 6, and the slag 20 flowing out from the slag spout 14 is poured into the slag ladle 18. The slag 20 filled with the slag 20 is transferred to the slag dump 22 and carried out in a short time so that the slag 20 does not drop from the slag outlet 14, and the other slag dump 24 empty the molten slag. Place the slag pan 26 in the slag position 16. By repeating the above work, the slag flowing out from the slag outlet of the electric furnace is treated.

Further, a slag processing apparatus has been proposed, which is mainly intended to reuse a part of the slag flowing out of the converter in the converter (Japanese Patent Laid-Open No. 63-199816). This slag treatment device is composed of a reformer input device for slag reforming and a tilting truck for reloading the reformed slag into the converter. It is not a device that does.

[0005]

The conventional slag processing operation shown in FIG. 3 has the following problems. (1) Due to safety issues, it is necessary to replace the slag ladle ladle with an empty ladle ladle within 5 to 10 minutes from the start of energization after the first scrap feed to the second scrap feed. Therefore, there is a problem that the time for changing the slag ladle under the furnace is short. Therefore, slag dump 1
In the stand, the replacement of the ladle pan was not in time on the time cycle,
Slag processing is performed with two slag dumps, one is a slag dump that carries out the slag pan into which the slag has flowed, and the other is a slag dump that carries in an empty slag pan.

(2) Depending on the state of slag forming in the furnace, a large amount of slag may flow out from the slag outlet in a short time, and the slag may overflow from the slag ladle. If the slag overflows from the slag ladle, the heat of the slag may burn the tire of the slag dump that is close to the slag ladle to carry the slag ladle out. For this reason, the slag dump cannot reach the ladle pan and the ladle pan cannot be carried out. If the slag ladle into which the slag has flown cannot be carried out, there is no slag ladle into which the slag generated by the next charge is poured, and the operation of the electric furnace stops. When the operation of the electric furnace is stopped, the continuous casting by the continuous casting machine is stopped and the production amount decreases,
Moreover, the casting cost rises. On the other hand, if the capacity of the slag ladle is increased to prevent the slag from overflowing from the slag ladle, not only the cost of the slag ladle itself will increase, but also the loading load will increase, so the cost of the slag dump will also increase. Rises and equipment costs increase significantly.

In view of the above circumstances, the present invention is a slag processing apparatus capable of carrying out and carrying in a slag pan even if the slag overflows from the slag pan, and can replace the slag pan at any time during the operation of the furnace. And a method for treating molten slag.

[0008]

Means for Solving the Problems The molten slag processing apparatus of the present invention for achieving the above object is (1) a first ladle stand arranged at a slag position below a slag outlet of a furnace (2) ) A first ladle stand placed on the first ladle stand, into which molten slag flowing out of the slag outlet flows, (3) a second ladle stand placed adjacent to the slag stand position (4) A second ladle pan placed on the second ladle stand (5) A pot receiving position where the first ladle stand with the first ladle pan placed is away from the slag position Transferred to the second
The second ladle placing table, on which the ladle ladle is placed, is provided with a ladle lapping transfer means for transferring the second ladle placing base from the standby position to the slag receiving position.

Further, the molten slag treatment method of the present invention is (6) arranging a first ladle stand at a slag position below a slag port of a furnace, and (7) first ladle stand (8) A second ladle stand is arranged at a standby position adjacent to the slag position, (9) A second ladle pan is placed on the second ladle stand, (10) ) Pour the slag flowing out of the slag outlet into the first slag pan, and (11) receive the first ladle stand on which the first slag pan is poured and into which the slag is poured. And (12) transferring the second ladle stand on which the second ladle ladle is placed from the standby position to the ladle position. To do.

Here, it is preferable that the first ladle placing table is arranged close to the slag opening, and the first slag ladle is placed near the slag opening. Further, it is preferable that the standby position is lower than the slag position, and the second slag pan is placed at a position lower than the first slag pan. Further, although the pot holder is not always necessary, if the pot holder is not used, it is necessary to place the molten metal ladle exactly at the pot receiving position.

[0011]

According to the molten slag treatment apparatus and the molten slag treatment method of the present invention, the molten slag flowing out from the slag outlet is poured into the first molten slag ladle, and a predetermined amount of the molten slag is deposited into the first molten slag ladle. When it is stored in, the first ladle placing table on which the first ladle ladle is placed is transferred to the ladle receiving position by the ladle ladle transfer means. Since this ladle receiving position is far from the slag position, even if the slag overflows near the slag position, the slag dump can carry out the first slag ladle.
Also, since the second ladle pan is placed at the standby position adjacent to the ladle position, the first ladle stand on which the first ladle pan is placed is received by the ladle pan transfer means. After the transfer to the position, the second ladle stand on which the second ladle pan is placed can be transferred to the slag position by the slag pan transfer means. Therefore, the slag ladle can be replaced at any time even while the furnace is in operation.

Here, when the first ladle stand is placed close to the slag opening and the first ladle pan is placed near the slag opening,
Since the fall distance of the molten slag is shortened, the scattering of the molten slag can be reduced. If the standby position is set lower than the slag position and the second ladle ladle is placed lower than the first ladle ladle, even if the molten ladle overflows from the first ladle ladle It can be poured into a second slag pan. Therefore, it is possible to prevent the molten slag from overflowing without increasing the size of the molten slag pan.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the molten slag processing apparatus and the molten slag processing method according to the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory view showing a slag treatment method, and FIG. 2 is a partial cross-sectional view showing a ladle stand placed at a slag position and a slag ladle placed on the pot stand.

At the slag position 34 below the slag outlet 32 of the electric furnace 30, a pan stand 50 for placing a slag pan 40 is arranged. In addition, under the floor of the furnace front work floor 36, the rail 3
8 is attached to the rail 38, and a transfer device 60 capable of hoisting the hanging hand 52 of the pan stand 50 with a hook 62 is suspended on the rail 38. The transfer device 60 lifts the pot stand 50 on which the slag ladle 40 is placed, and puts the pot stand 50 into the slag position 34, a standby position 44 adjacent to the slag position 34 and lower than the slag position 34. , And the pan receiving position 46 away from the slag position 34. The pot stand 50 is placed on the pedestal 54, and a slag scattering prevention wall 56 is provided around the pedestal 54.

Next, the movement of the slag ladle 40 will be described. First, the pan stand 5 with the slag pan 40 placed in the slag position 34 under the furnace
0 is arranged, and the operation is started in a state in which the ladle stand 50a on which the slag ladle 40a is placed is also arranged at the standby position 44. The slag 70 flowing out from the slag outlet 32 of the electric furnace 30 is poured into the slag ladle 40 placed on the ladle stand 50. Electric furnace 30
When the melting and refining processing in the above is completed and the outflow of the slag 70 is stopped, the transfer device 60 is used to move the slag ladle 40 into the ladle stand 50.
Lift it up and lower it to the pan receiving position 46. Next standby position 4
The empty slag ladle 40a in 4 is moved together with the ladle stand 50a to the hoisting and receiving position 34 so that the slag in the next processing flows. On the other hand, the ladle pan 4 placed in the pan receiving position 46
0, the slag dump 80 comes to the next processing, carries it to the slag cooling place (not shown), and carries another empty slag ladle (not shown) to the pot receiving position 46. Put in. Next, using the transfer device 60, the molten metal ladle at the ladle receiving position 46 is lifted together with the ladle stand and moved to the standby position 44.
This completes a series of operations. Thereafter, the slag ladle 40 and the pot stand 50 are handled together according to the operation of the electric furnace 30 in the same procedure.

In the present invention, the slag 70 is the slag ladle 4
Even if it overflows from 0, since the pan receiving position 46 is apart from the slag position 34 under the furnace, the rubber tire of the slag dump 80 is not burned and the slag ladle 40 can be picked up at any time. . However, if a large amount of slag 72 is accumulated under the furnace, the slag 72 may flow into the standby position 44 immediately adjacent to the slag 72, and the pan stand may tilt when the pan stand is placed in the stand-by position 44. Once the pan stand tilts, it becomes impossible to lift the pan stand because the hook of the pan stand and the hook of the transfer device do not fit. As a result, the pan cannot be moved to the slag position, and the ladle pan 40 Will also hinder the handling. Therefore, the slag 72 under the furnace is removed by a shovel car (not shown) every predetermined period (for example, 4 to 5 times a week).

Further, since the pan stand moves by being suspended under the rail below the floor and reciprocates mechanically at the same position, there is almost no lateral displacement. On the other hand, since the slug dump 80 is a "trackless vehicle" and is driven by a "human",
The position is different each time. Especially when stacking empty pans and backing them, you can't see the back well, so even if you decide where to put the pans, they will slip. As for this deviation, if it is a deviation in the front-back direction (traveling direction of the transfer apparatus), it is possible to hook the hook by adjusting the transfer apparatus forward and backward, but if it is a lateral deviation, the hook will move in the horizontal direction. Since it doesn't move, I can't handle it and can't lift the pot. If there is a pan stand, this pan is always handled by the transfer device, so there is no horizontal displacement and it can always be lifted to change its position. It is also possible to lift the ladle ladle without using the ladle stand, instead of hoisting the ladle stand, but the skill of accurately placing an empty ladle pan at the pot receiving position is required for the operation of the slag dump 80. To be done. It should be noted that the raising / lowering means, the traveling means, and the attachment / detachment means of the pan stand are not particularly limited as long as the transfer device 60 can be lifted and moved together with the pan stand.

Next, in the 100t class electric furnace factory
When using the slag ladle transfer device of the above-mentioned example
Put a slag pan under the conventional furnace and take it with a slag dump.
The table below shows a comparison of the cases when coming to. Here, the operation of the electric furnace
Business conditions are the time from Tap to Tap (1 charge
Time is 60 minutes, slag generation is 10t / ch
), The ladle pot capacity is 8m ³ Is. ─────────────────────────────────── Conventional method The present invention Allowable time for pan replacement (min / ch) 5-10 50-55 Required number of dedicated dump trucks (units) 21 Operation stop due to scattered slag (times / day) 1-20 Removal of under-furnace slag by shoveler (times / week) 10-15 4-5 ─── ──────────────────────────────── In the conventional method, the time allowed for pan replacement is short because the furnace is
If there is a possibility that the slag will fall below,
Since it cannot enter, the melting
This is because the time to replace the slag pan with the special dump becomes shorter
It

In the above embodiment, the slag dump does not need to enter under the furnace, and the slag ladle can be replaced at any time. Therefore, only one slag dump is required and the equipment cost is low. Also, since the slag ladle is placed near the slag outlet, less slag is scattered, and as a result, less slag accumulates on the ground and less frequent under-furnace cleaning is required. Also, when the slag dump lowers the ladle pan, even if the ladle pan placement error occurs, it is the ladle stand that directly lifts the transfer device, so regardless of the ladle pan placement error, Can handle.

[0020]

As described above, according to the slag treatment device and the slag treatment method of the present invention, the first slag ladle and the second slag ladle are placed at the slag position and the standby position, respectively. Since the slag ladle into which the slag has flowed is transferred to the ladle receiving position by using the slag ladle transferring means, even if the slag overflows near the slag position, the first slag dump will be used. The slag pan can be carried out.
Further, since the second slag pan is placed at the standby position adjacent to the slag position, the second slag pan can be transferred to the slag position by the slag pan transfer means. Therefore, the slag ladle can be replaced with one slag dump at any time even while the furnace is in operation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a molten slag treatment method according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a pan stand placed in a slag position and a slag pan placed on the pan stand.

FIG. 3 is an explanatory diagram showing a conventional slag processing operation.

[Explanation of symbols]

 30 Electric Furnace 32 Discharge Port 34 Slag Position 38 Rails 40, 40a Slag Pan 44 Standby Position 46 Pan Receiving Position 50, 50a Pot Stand 52 Lifter 60 Transfer Device 62 Hook 70 Slug 80 Slag Dump

Claims (2)

[Claims] 1. A first ladle stand placed at a slag position below a slag port of a furnace, and a slag flowing from the slag port, which is placed on the first ladle stand, into which the molten metal flows. No. 1 ladle ladle, a second ladle stand placed at a standby position adjacent to the ladle position, a second ladle pan placed on the second ladle stand, and the first molten ladle The first pan stand on which the slag pan is placed is transferred to a pan receiving position distant from the slag position, and the second pan stand on which the second slag pan is placed is moved from the standby position. A molten slag processing device comprising: a molten slag ladle transferring means for transferring the slag to the slag receiving position. 2. A first ladle pedestal is disposed at a slag position below a slag outlet of a furnace, a first slag ladle is placed on the first ladle basin, and a standby is provided adjacent to the slag position. The second ladle stand is arranged at a position, the second molten pan is placed on the second ladle stand, and the molten metal flowing out from the slag outlet is poured into the first molten metal pan, The first ladle stand on which the poured first ladle pan is placed is transferred to a ladle receiving position away from the ladle position, and the second ladle pan on which the second ladle pan is placed is placed. 2. The method for treating molten slag, characterized in that the pot stand is transferred from the standby position to the slag position.