JPH0746032B2 - Method for charging lumps in a blowing furnace - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for charging a lump in a blowing furnace having a rising flue and a lance pipe.

"Prior Art" Conventionally, as a blowing furnace as described above, Figs.
A blowing furnace 11 as shown in the figure is known. This blowing furnace 11
Is equipped with a bottomed cylindrical furnace body 13. This furnace body 13
Is provided with a ceiling wall 15, and the solution L is stored inside. A lance pipe 17 is provided on the ceiling wall 15. The lance pipe 17 is provided so as to penetrate the ceiling wall 15, and is adapted to feed oxygen-enriched air into the furnace body 13 at high speed to cause an oxidation reaction in the solution.

An opening 19 is provided on one side of the ceiling wall 15 across the lance pipe 17, and an upward flue 21 having a rectangular cross section for discharging exhaust gas is provided above the opening 19 above. There is. A splash holding jacket 23 is provided between the opening 19 of the ceiling wall 15 and the lance pipe 17. The splash holding jacket 23 is provided to prevent the splash of high-speed gas from the lance pipe 17 from entering the rising flue 21 and is provided so as to project downward. The splash holding jacket 23 is formed along the opening edge of the opening 19 on the side of the lance pipe 17 orthogonal to the direction from the lance pipe 17 to the opening 19, and both ends thereof are It has reached the side wall portion 25 of the furnace body 13. Further, a solution outlet 27 is provided in the side wall 25 on the other side of the furnace body 13 with the lance pipe 17 interposed therebetween.

"Problems to be Solved by the Invention" By the way, in the above blowing furnace 11, the lance pipe 17
Although the powder can be charged into the furnace through the furnace, there is a problem that the lump cannot be charged.
On the other hand, it may be considered to provide the blowing furnace 11 with a charging port. However, since the splash is intensely scattered in the blowing furnace 11, even if the charging port is provided, it is blocked by the splash and is useless.

"Means for Solving Problems" The present invention has been made to solve the above problems, and a first charging port is provided on a side wall of a rising flue and a lance pipe for a splash holding jacket. A second charging port smaller than the first charging port is provided on the ceiling wall on the side opposite to, and a large lump having a smaller apparent specific gravity than the in-reactor melt is charged from the first charging port. The second
A small lump with a larger apparent specific gravity than the molten metal in the furnace is charged from the charging port.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. It should be noted that, in these drawings, the same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

These figures are views showing a blowing furnace 31 used in the method for charging a lump in a blowing furnace according to the present invention.

The blowing furnace 31 is used as a smelting furnace and a copper manufacturing furnace in a continuous copper manufacturing process, and the rising flue 21
The first charging port 35 is provided on the side wall 33 of the. Also,
A second charging port 39, which is smaller than the first charging port 35, is provided on the ceiling wall 37 of the splash holding jacket 23 on the side opposite to the lance pipe 17.

An opening / closing door 41 is provided at the first loading port 35. On the side of the first charging port 35, a mounting table 43 for mounting the pressed product P to be charged is provided. A pressed product pushing device 45 is provided on the side of the mounting table 43. The press product pushing device 45 is equipped with an air cylinder, and pushes the press product P conveyed to the mounting table 43 into the first loading port 35. A conveyer 47 is provided above the press product pushing device 45 to supply the press product P to the mounting table 43.

Next, a method for charging a lump in the blowing furnace 31 will be described. In this charging method, from the first charging port 35, a large lump having an apparent specific gravity smaller than that of the melt in the furnace,
For example, pressed products such as scraps are loaded. On the other hand, from the second charging port 39, small-sized lumps having an apparent specific gravity larger than that of the in-furnace melt, such as crushed scrap (50 mm or less) and cut residues, are charged.
Here, in the procedure of charging the pressed product P into the furnace at the first charging port 35, first, the pressed product P is supplied onto the mounting table 43 by the conveyor 47. Next, the open / close door 41 is opened. Next, the pressed product P placed on the mounting table 43 is raised by the pressed product pushing device 45 and pushed into the flue 21, and is supplied into the melt L in the furnace body 13.
Then, the pressed product P supplied into the furnace is melted in the solution L.

As described above, in the method for charging the lumps in the blowing furnace 31, the side wall 33 of the rising flue 21 is provided with the first charging port 35 and the splash holding jacket 23 is provided.
The second charging port 39 is provided in the ceiling wall 37 on the side opposite to the lance pipe 17, and the lumps are charged from these charging ports. First charging port 35 and second charging port
It is hard to reach 39. Therefore, it is possible to prevent the first charging port 35 and the second charging port 39 from being blocked,
The pressed product P can be easily loaded into the furnace.

Further, since the pressed product P is loaded at the position most distant from the solution outlet 27 and is inserted on the side opposite to the solution outlet 27 by sandwiching the lance pipe 17, the pressed product P is loaded from the lance pipe 17. The solution outlet 27 cannot be easily reached by the waves on the molten metal surface due to the high-speed fluid. Therefore, it is possible to sufficiently dissolve the pressed product P and prevent the undissolved pressed product from reaching the solution outlet 27 and blocking the solution outlet 27.

Further, the first charging port 35 provided in the rising flue 21
From the above, a large lump having an apparent specific gravity smaller than that of the melt in the furnace is charged, and the second charging port 39 provided in the ceiling wall 37 is formed to be smaller than the first charging port 35. Since the compacts that are small in size and have a larger apparent specific gravity than the melt in the furnace are charged from the inlet 39, the dropping distance of the charged substances having a large apparent specific gravity can be shortened, thus preventing damage to the furnace bottom. can do. Also, for large items, the first
Since the charging is carried out from 35 and the second charging port 39 is formed smaller than the first charging port 35, leakage of heat and air from the second charging port 39 near the furnace body 13 is minimized. You can keep it to the limit.

[Advantages of the Invention] As described above, according to the present invention, the first inlet is provided in the side wall of the rising flue, and the ceiling wall on the side opposite to the lance pipe of the splash holding jacket is A second charging port, which is smaller than the first charging port, is provided, and a large-sized lump having an apparent specific gravity smaller than that of the molten material in the furnace is charged from the first charging port, and the small charging furnace is charged from the second charging port. Since a lump having an apparent specific gravity larger than that of the inner solution is charged, the following effects can be obtained.

(A) It is possible to prevent the charging port from being blocked.

(B) A large-sized charge having an apparent specific gravity smaller than that of the melt in the furnace floats on the solution and cannot reach the bottom of the furnace, and therefore damage to the bottom of the furnace can be prevented.

(C) Even for a small-sized charge having a larger apparent specific gravity than the melt in the furnace, the falling distance is short, the confidence in the load is small, and the resistance of the melt in the furnace is large because it rotates during the drop. It is possible to prevent the contents from colliding with the bottom of the furnace, and thus prevent damage to the bottom of the furnace.

(D) The charge is charged at a position separated from the solution outlet, and is also charged on the side opposite to the solution outlet by sandwiching the lance pipe. Therefore, the charge is the high-speed fluid and the hot water from the lance pipe. Waves on the surface cannot easily reach the solution outlet. Therefore, the undissolved charge can be sufficiently dissolved, and as a result, only the completely melted charge can be discharged from the solution outlet, and the undissolved charge reaches the solution outlet and blocks the solution outlet. It is possible to prevent that.

(E) A large charge is loaded sideways from the first charge provided on the side wall of the rising flue, and a small charge is directly fed from the second charge provided on the ceiling wall. Since it is designed to be dropped, it is easy to handle and charge the charge.

(F) Heat and air leakage from the furnace body can be minimized.

[Brief description of drawings]

1 to 3 are views showing an embodiment of the present invention, wherein FIG. 1 is a side sectional view thereof, FIG. 2 is a plan view thereof, and FIG.
FIG. 4 is a sectional view taken along the line III-III in FIG. 2, and FIGS. 4 and 5 are views showing an example of a conventional smelting furnace.
The drawing is a side sectional view thereof, and FIG. 5 is a sectional view taken along the line VV in FIG. 13 …… Furnace body, 15 …… Ceiling wall, 17 …… Lance pipe, 19
…… Aperture, 21 …… Standing flue, 23 …… Splash holding jacket, 27 …… Solvent outlet, 31 …… Blowing furnace,
33 …… Side wall, 35 …… First entrance, 37 …… Ceiling wall, 39…
… Second booth.

Claims (1)

[Claims] 1. A lance pipe is provided on a ceiling wall of the furnace body, and an opening of a rising flue is provided on one side of the lance pipe of the ceiling wall, and the lance pipe is provided from the opening of the ceiling wall. In a blowing furnace in which a splash pressing jacket projecting downward is provided near the lance pipe, and a solution outlet is provided on the other side of the lance pipe of the furnace body, a first side wall of the rising flue is provided. And a second charging port smaller than the first charging port is provided on the ceiling wall of the splash holding jacket on the side opposite to the lance pipe.
A large lump having an apparent specific gravity smaller than that of the in-furnace melt is charged from the charging port, and a small lump having a larger apparent specific gravity than the in-furnace melt is charged from the second charging port. Method for charging lumps in a blowing furnace.