JP2855870B2 - Injection method of scrap lump in metallurgical furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for charging scrap metal into a metallurgical furnace such as a smelting furnace or a copper making furnace used in copper smelting.

[0002]

2. Description of the Related Art As a means for recycling and producing a scrap mainly containing copper and containing gold or silver, a scrap is press-formed to form a substantially cubic scrap mass, and the scrap mass is formed into a metallurgical furnace. Means for pouring in and melting in molten metal are known. According to this means, a useful substance such as metallic copper can be obtained from the scrap lump by smelting the molten metal charged with the scrap lump by a usual smelting means.

FIG. 1 shows a known metallurgical furnace used for such means. The metallurgical furnace 10 is a smelting furnace, which is a kind of metallurgical furnace used in the continuous copper making method, and has an opening 21 formed at an upper portion of a metallurgical furnace main body 20 formed in a substantially cylindrical shape. The scrap lump P is fed into the metallurgical furnace main body 20 by the conveyor C from the section 21 and melted in the molten metal L.

However, in this method, since the scrap lumps P are dropped from a relatively high position, the scrap lumps P may collide with and damage the hearth of the metallurgical furnace main body 20, and may be damaged. The life of the molten metal may be shortened, or the molten metal may be greatly ruffled by the impact when the molten metal falls down, so that the molten metal flowing out of the molten metal outlet (especially the overflow port) may overflow from the molten metal outflow gutter or the like. is there.

[0005] Therefore, there is also a means for preventing damage to the hearth by forming an opening in a side portion of the metallurgical furnace main body relatively close to the liquid level of the molten metal and introducing a scrap lump from the opening. You can think.

However, when the opening is formed on the side of the metallurgical furnace main body, the splash (splash) scattered by the pressure of the air blown into the molten metal to oxidize the molten metal is formed in the opening. There is an inconvenience that it adheres to the peripheral surface, solidifies and closes the opening, and it becomes impossible to supply the scrap mass from the next time.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent a blockage of an opening by a splash and to continuously input a scrap lump from a side surface of a metallurgical furnace main body. It is an object of the present invention to provide a method of charging a scrap mass that can be performed.

[0008]

The method of the input scrap mass according to the present invention SUMMARY OF] is to closing the furnace opening by Rukoto to wait scrap mass to be introduced into the next to the opening, then, put into the next but one time the Rukoto the abutted is moved toward the scrap mass to be introduced into the next by the scrap mass moving means scrap mass, to put into the next
That scrap mass is dropped to the internal metallurgical furnace body, a scrap mass to be introduced to the next next to wait to the opening Turkey
Thus, the inside of the furnace is closed .

[0009]

According to this charging method, the next lump of scrap is put in a standby state near the opening, and when the next lump of lump is charged, the next lump of scrap lump is moved by the scrap lump moving means. Is moved toward the next scrap lump, abutted against the next scrap lump and extruded forward, thereby dropping into the metallurgical furnace main body, and waiting for the next next scrap lump to be in the vicinity of the opening. The scrap can be always kept on standby at the opening. Therefore, when the splash scatters upward from the molten metal, the splash adheres to the surface of the scrap mass waiting at the opening, and can be prevented from adhering to the inner peripheral surface of the opening.
Therefore, it is possible to prevent the splash from adhering to the inner peripheral surface of the opening and closing the opening.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for charging a scrap mass according to the present invention (hereinafter referred to as "charging method") will be described below.

First, the configuration of the metallurgical furnace 10 used in the charging method of the present embodiment will be described with reference to FIGS.
In the description of the present embodiment, the same components as those of the conventional metallurgical furnace 10 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the metallurgical furnace body 20 according to the present embodiment, an opening 21 is formed on the side surface and at a position approximately 470 mm above the liquid level of the molten metal L.
Is attached with a scrap lump charging passage (hereinafter, abbreviated as “passage”) 30 formed in a substantially rectangular cylindrical shape.
The passage 30 is connected to a first passage 31 extending horizontally from the opening 21 and an opening 31 a formed substantially in the middle of the side surface of the first passage 31, and extends in an orthogonal direction. And the second passage 32 protruded.

The first passage 31 has an opening 31a.
A first shutter 40 that opens and closes the inside of the first passage 31 to block and open the airflow is provided at a substantially intermediate position between the first shutter 40 and the opening 21 so as to be movable in the horizontal direction. The distal end of the rod 42 of the first air cylinder 41 is attached to one end of the first shutter 40 in the horizontal direction.

At the rear end of the first passage 31, there is provided a protruding rod 51 which penetrates the inside and outside of the first passage 31 and is movably mounted in the extension direction. The first scrap lump moving means 50 constituted by the attached hydraulic cylinder 52 is attached. A pusher plate 51a formed in a plate shape is fixed to a tip of the protruding rod 51.

The rear portion 32a side of the second passage 32 is shown in FIG.
As shown in the figure, the upper and both sides are open.

In the second passage 32, a second shutter 60 is mounted near the opening 31a. The second shutter 60 has the same configuration as the first shutter 40, and has a rod 62 of the second air cylinder 61 to which a distal end is attached.

At the rear portion 32a side of the second passage 32, a scrap lump moving means 70 having the same construction as the first passage 31 and comprising a projecting rod 71 and a hydraulic cylinder 72 is attached. I have. A pusher plate 71a formed in a plate shape is fixed to the tip of the protruding rod 71.

Next, the metallurgical furnace 1 configured as described above
A method of putting a scrap lump at 0 will be described.

First, before starting the smelting operation in the metallurgical furnace 10, the scrap lump P 1 to be charged next time is placed in the metallurgical furnace main body 2.
A normal smelting operation is performed with the opening 21 located near the opening end of the opening 21 formed on the side surface of the zero. During this smelting operation, for example, even if a splash occurs above the melt L due to air for melt oxidation blown into the melt L,
Since the scrap lump P1 is previously disposed near the opening 21, the splash scattered toward the opening 21 adheres to the scrap lump P1. That is, since the splash can be prevented from being attached to the inner peripheral surface of the opening 21, there is an advantage that the opening 21 can be prevented from being closed.

Next, a method of putting a scrap lump into the metallurgical furnace main body 20 will be described. First, on the rear portion 32a of the second passage 32, in front of the pusher plate 71a fixed to the protruding rod 71, a scrap lump P2 to be charged next time is placed by a crane or the like. Next, the second air cylinder 61 is operated to open the second shutter 60. Then, the second hydraulic cylinder 72 is operated to move the protruding rod 71 forward, and the pusher plate 71a is brought into contact with the scrap lump P2, which is stored in the first passage 31. Next, after the protruding rod 71 is moved backward, the second shutter 60 is closed. Next, the first air cylinder 41 is operated,
The first shutter 40 is opened, and the inside of the metallurgical furnace body 20 and the first
The interior of the passage 31 is communicated. Then, the first hydraulic cylinder 52 is operated to push the first protruding rod 51 forward, and the pusher plate 51a is moved to the scrap lump P2.
The scrap lump P2 is moved forward by contact with the scrap lump P1, and is brought into contact with the scrap lump P1 previously positioned in the vicinity of the opening 21 and extruded into the furnace. Then, the scrap lump P1 falls into the metallurgical furnace main body 20 and melts in the molten metal L. After the scrap lump P1 falls, the scrap lump P2 is further slightly pushed forward and moved to the vicinity of the opening 21, and the pushing operation is stopped in this state.
Accordingly, the scrap lump P2 to be charged next time can be made to stand by in the vicinity of the opening 21, so that the opening 21 can be prevented from being closed.

Next, the protruding rod 51 is moved backward, and the shutter 40 is closed. Thereafter, by the same procedure, the scrap lump can be always kept on standby near the opening 21 while the scrap lump is sequentially charged into the metallurgical furnace main body 20.

According to the metallurgical furnace 10 of this embodiment, the shutters 40 and 60 are provided in the first and second passages 31 and 32, respectively.
When the second shutter 60 is open, the first shutter 40 is closed, and when the first shutter 40 is open, the second shutter is closed. The communication between the inside and the outside can be prevented, and the plume generated from inside the metallurgical furnace main body 20 can be prevented from spouting outside.

Therefore, there is an advantage that the working environment can be improved.

[0024]

The method of the input scrap mass according to the present invention is to closing the furnace opening by Rukoto to wait scrap mass to be introduced into the next in the vicinity of the opening of the metallurgical furnace, it is then charged into the next but one time The scrap lump is moved by the scrap lump moving means toward the next scrap lump, brought into contact with the scrap lump and dropped into the metallurgical furnace main body, and the next next lumped scrap lump is opened in the metallurgical furnace. since it is assumed to be closed this furnace opening by Rukoto is waiting, splash scattered upward from the melt becomes to adhere to the surface of the scrap mass waiting near the opening, Adhesion to the inner peripheral surface of the opening is prevented.

Therefore, it is possible to prevent the splash from adhering to the inner peripheral surface of the opening and to close the opening, so that there is no hindrance to the introduction of the scrap mass.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a conventional metallurgical furnace.

2A is a cross-sectional view of a main part of a metallurgical furnace according to the present invention, and FIG. 2B is a cross-sectional view of FIG.
It is a principal part cross-sectional view which shows the right side part from -X-ray.

FIG. 3 is a sectional view of a main part taken along line AA of FIG. 2;

FIG. 4 is a sectional view of a main part taken along line BB of FIG. 2;

FIG. 5 is a sectional view of a principal part taken along line CC of FIG. 2;

[Explanation of symbols]

 Reference Signs List 20 metallurgical furnace main body 21 opening of metallurgical furnace main body 31 first scrap lump input passage 32 second scrap lump input passage 50 first scrap lump moving means 70 second scrap lump moving means P1 next scrap lump P2 next next lump Scrap lump to be input

Continuation of the front page (56) References JP-A-63-169476 (JP, A) JP-A-51-69409 (JP, A) JP-A-59-57796 (JP, U) JP-A-49-13771 (JP) , Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F27D 3/04 F27B 3/00-3/28 C22B 9/16 C22B 15/00-15/06

Claims (1)

(57) [Claims] 1. A metallurgical furnace main body having an opening formed on a side surface, a scrap lump charging passage connected to the opening,
Scrap mass moving means attached to the scrap mass input passage for moving the scrap mass in the direction of the metallurgical furnace main body, and the scrap mass moving means inputs the scrap mass from the scrap mass input passage into the metallurgical furnace main body. in turned methods scrap mass in the metallurgical furnace so as to, firstly, the furnace opening by Rukoto to wait scrap mass to be introduced into the next time the outlet obstruction
And, then, by abutment is moved toward the scrap mass to be introduced to the next by the scrap mass moving means scrap mass to be introduced into the next but one time, the scrap mass to be introduced to the next within a metallurgical furnace body is dropped, a method of input scrap mass scrap mass to be introduced to the next next characterized that you closing the furnace opening by Rukoto to wait to the opening.