JPH07113516B2 - Smelting furnace - Google Patents

Description

TECHNICAL FIELD The present invention relates to a smelting furnace having a rising flue and a lance pipe.

"Prior Art" Conventionally, as a smelting furnace as described above, Figs.
A smelting furnace 11 as shown in the figure is known.

The smelting furnace 11 includes a bottomed cylindrical furnace body 13.
The furnace main body 13 is provided with a ceiling wall 15 and a solution L
Is stored. The ceiling wall 15 has a lance pipe 17
Is provided. This lance pipe 17 is the ceiling wall
The smelting raw material and the auxiliary raw material (solvent) in the form of powder are placed in the furnace body 13 together with the oxygen-enriched air, or only the auxiliary raw material is supplied together with the oxygen-enriched air at high speed. It is sent to cause an oxidation reaction in the solution.

An opening 19 having a substantially rectangular cross section is provided on one side of the ceiling wall 15 with the lance pipe 17 interposed therebetween, and a rising smoke path 21 for discharging exhaust gas is provided above the opening 19. ing. 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 portion 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 smelting 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 smelting furnace 11 with a charging port. However, since the splashes are intensely scattered in the smelting furnace 11, even if the charging port is provided, the splashes cause the plugs to be blocked, which is useless.

The present invention has been made in view of the problems of the above-mentioned conventional technology, and the charging port is not blocked by the splash, and the lumps that cannot be conventionally processed (those that cannot be charged into the furnace body from the lance pipe). The purpose of the present invention is to provide a smelting furnace that can be stably operated while being charged into the furnace main body through this charging port and in parallel with blowing from the lance pipe.

[Means for Solving the Problems] The present invention for achieving the above-mentioned object is to provide a lump on at least one of the side of the splash holding jacket opposite to the lance pipe and the ceiling wall and the side wall of the rising flue. And a charging means for charging the lumps into the furnace body one by one 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 smelting furnace 31 according to the present invention. In this smelting furnace 31, a charging port 35 is provided on a side wall 33 of the rising flue 21. An opening / closing door 37 is provided at the loading port 35. On the side of the charging port 35, a mounting table 39 for mounting the pressed product (lump) P to be charged is provided. On the side of the mounting table 39, a press product pushing device 41
Is provided. The press product pushing device 41 is equipped with an air cylinder, and is adapted to push the press product P conveyed to the mounting table 39 into the loading port 35. A conveyer 43 is provided above the press product pushing device 41 to supply the press product P to the mounting table 39.

In such a smelting furnace 31, a powdered smelting raw material is sent from the lance pipe 17 into the furnace body 13 together with oxygen-enriched air, while a pressed product P that cannot be loaded from the lance pipe 17 is loaded into the furnace. To enter, first, the press product P is supplied onto the mounting table 39 by the conveyor 43. Next, the door 37
To open. Next, the pressed product P placed on the mounting table 39 is pushed up into the flue 21 by the pressed product pushing device 41 and supplied into the melt L in the furnace body 13. As is apparent from the above description, the loading table 39, the press product pushing device 41, and the transfer conveyor 43 are used to load the press products P (lumps) into the furnace body 13 one by one through the charging port 35. Means are configured. Then, the pressed product P supplied into the furnace is melted in the solution L.

Thus, in this smelting furnace 31, the rising flue
The side wall 33 of the 21 is provided with the charging port 35, so that the splash is blocked by the splash pressing jacket 23 and the splash is blocked by the charging port 35.
It is hard to get Therefore, the charging port 35 can be prevented from being blocked, and the pressed product P can be easily charged into the furnace.

Further, since the pressed product P is loaded at a position most distant from the solution outlet 27 and is also installed on the side opposite to the solution outlet 27 with the lance pipe 17 sandwiched therebetween, the pressed product P is fed 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.

In the above embodiment, the charging port 35 is provided on the side wall 33 of the rising flue 21, but the invention is not limited to this.
It may be provided on the ceiling wall 45 closer to the opening 19 than the splash press jacket 23, and even in this case, the same effect as that of the above-described embodiment can be obtained.

[Advantages of the Invention] As described above, according to the present invention, at least one of the ceiling wall and the side wall of the rising flue of the splash holding jacket on the side opposite to the lance pipe is provided with a lump charging port. Since it is provided, it is possible to prevent the blockage due to the spout of the charging port, and thus, while the blowing from the lance pipe is being performed, the lumps that could not be conventionally treated are charged into the furnace body from the charging port. be able to. Then, the lump can be charged at a position separated from the solution outlet, so that the lump can be completely dissolved, and the undissolved lump can be prevented from blocking the solution outlet. The effect is obtained.

Also, by loading the lumps into the furnace body one by one, the flue is not clogged with lumps, and the lumps are surely dropped onto the molten metal surface and melted on the molten metal surface. You can

[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 …… Smelting furnace,
33 …… Side wall, 35 …… Entrance, 45 …… Ceiling wall, P …… Pressed product (lump).

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 smelting furnace in which a splash holding 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, the splash holding jacket is opposite to the lance pipe of the splash holding jacket. For providing at least one of the ceiling wall on the side of and the side wall of the rising flue with an inlet for lumps, and for charging the lumps into the furnace body one by one from the inlet. A smelting furnace equipped with charging means.