JP2536597Y2 - Smelting 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 smelting furnace used for smelting metals such as copper, and more particularly to a smelting furnace capable of dissolving ore in parallel with oxidizing a solution. It is about.

[0002]

2. Description of the Related Art In the smelting of copper, for example, the ore of copper as a raw material is dissolved and separated into kava and kalami, and the kava is oxidized by blowing oxygen-enriched air to reduce the purity of metallic copper. The smelting is carried out with the improvement.

In the smelting furnace used for smelting copper, the ore is charged into the smelting furnace together with oxygen-enriched air, and the ore is dissolved in parallel with the oxidation of the river. Technology has already been proposed.

[0004] The configuration of a smelting furnace used in this technique will be described with reference to FIG.

In this smelting furnace, a large number (about 50) of tuyeres 20 are fixedly provided at predetermined intervals on a side portion of a rotatable furnace body 10.

The tuyere 20 is used for oxidizing the solution by blowing air into the solution (river) of the furnace body 10. The tuyere 20 is a straight tubular body 21 penetrating the side wall of the furnace body 10.
A first joint 22 connected to the outer end (the right end in FIG. 2) of the main body 21 to branch the main passage 30 supplied by the main body 21 into two branch passages 31 and 32;
The branch passage 3 is connected to the outer end of the first joint 22.
1 that further branches 1 into two branch passages 33 and 34
And a joint 23.

The one branch passage 33 provided in the second joint 23 is for sending air toward the inside of the furnace body 10 through the branch passage 31 and the main passage 30.
At its end, it is connected to an air main pipe (not shown).

The other branch passage 34 is connected to the branch passage 3
The ore is supplied to the ore charging pipe (not shown) at the end of the ore, and the pressure of the air supplied from the ore charging pipe through the branch passage 33 is supplied to the ore charging pipe. Thus, the fuel is fed into the furnace main body 10 through the branch passage 31 and the main passage 30.

The branch passage 3 provided in the first joint 22
2 is for removing the solution adhered and solidified on the inner end or the inner peripheral surface of the main body 30 by inserting a punching rod 40 into the main body 30. It is formed as if it were extended straight. At the outer end of the branch passage 32, a ball 51 is always placed on the valve seat 52 to close the passage, and when the punching rod 40 hits the ball 51, the ball 51 is placed above the valve seat 52. A valve mechanism 50 is provided which rises to the provided standby position (two-dot chain line in FIG. 2) and allows the punching rod 40 to pass therethrough.

In the above-described conventional smelting furnace, the branch passage 32 is formed to extend straight from the main passage 30, so that the rod-shaped punching rod 40 is inserted into the main passage 30 from the branch passage 32. Therefore, there is an advantage that the above-mentioned solution removing operation can be performed.

Incidentally, in the conventional smelting furnace,
Since the branch passage 32 is configured to extend straight from the main passage 30, the branch passage 31 is configured to be slightly inclined with respect to the extension direction of the main passage 30. For this reason, the flow of the air blown from the branch passage 33 becomes slightly turbulent at the junction between the main passage 30 and the branch passage 31 (near the outer end of the main body 21), and the flow toward the inside of the branch passage 32 is reduced. Will occur. Then, a part of the ore injected from the branch passage 34 may enter the inside of the branch passage 32 and stay near the inside of the ball 51 constituting the valve mechanism 50 in some cases.

As described above, when the ore stays in the vicinity of the ball 51, the punching rod 40 hits the ball 51, and the ball 51 is moved from the valve seat 52.
There is a problem that the ore blows out from the gap formed between the ball 51 and the valve seat 52 to the outside and scatters around to deteriorate the working environment.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a smelting furnace capable of preventing ore blowing.

[0014]

The smelting furnace according to the present invention comprises:
The tuyere has a configuration in which a through hole for air blowing is formed in the passage near the valve body and at a position between the valve body and the inside of the furnace body.

[0015]

According to the smelting furnace of the present invention, since a through-hole for blowing air is formed in the tuyere, a nozzle or the like connected to the pump is inserted into the through-hole before the punching rod is inserted into the branch passage. By attaching and blowing air from the through hole toward the inside of the passage, the ore that has accumulated near the valve body can be blown off and removed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a smelting furnace according to the present invention will be described with reference to FIG. In the description of the present embodiment, the same components as those of the above-described conventional smelting furnace are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the smelting furnace according to this embodiment, the tuyere 2
0, a through hole 60 for air blowing which is communicated with the outside at a position above the ball (valve element) 51 and is slightly inclined upward is formed in the first joint 22 constituting the first joint 22. 60 differs from the conventional smelting furnace in that a residue removing pipe 61 is fitted to the smelting furnace. Thereby, in the smelting furnace of the present embodiment, the through hole opened in the branch passage (passage) 32 near the ball 51 and at a position between the ball 51 and the inside of the furnace main body 10. 60 are formed.

In the smelting furnace according to the present embodiment, before the punching rod 40 is inserted into the branch passage 32,
A nozzle connected to an air supply device such as a pump is attached to the residue removing pipe 61, and air is intermittently or continuously injected toward the inside of the branch passage 32. As a result, the ore staying in the vicinity of the inside of the ball 51 is removed from the furnace body 10.
Can be blown off to the inside.

Next, in the same manner as in the prior art, the punching rod 40 is abutted against the ball 51 to move the ball 51 upward, and the punching rod 40 is inserted into the main passage 30 to remove the solution and remove the solution. Blockage can be prevented.

At this time, in the conventional smelting furnace, there was a problem that the ore retained near the ball 51 was blown out from the tuyere. However, according to the smelting furnace of this embodiment, the punching rod 40 was Before the insertion, the ore staying in the vicinity of the ball 51 can be blown off. Therefore, when inserting the punching rod 40,
Already, there is almost no ore.

For this reason, even if the punching rod 40 is inserted, no ore is blown out, so that there is an advantage that the working environment around the tuyere can be improved as compared with the related art.

The other operations are the same as those of the conventional smelting furnace, and the description is omitted.

In the smelting furnace of the above embodiment, the through hole 60 is formed slightly inclined above the ball 51. However, as shown by the dashed line in FIG. Alternatively, the through hole 160 may be formed to extend in the horizontal direction. In this case, since the air blown from the through hole 160 flows along the upper surface of the branch passage 32 and forms a vortex, air can be blown from above onto the ore retained near the ball 51. . Therefore, the ball 5
It is also possible to blow off ore that is liable to remain near the bottom portion of the ore, and the ore removal efficiency can be improved.

Further, the through-hole may be a through-hole 260 formed near the bottom of the ball 51 as shown by a two-dot chain line in FIG. In this case, since air can be blown directly to the ore that has accumulated near the bottom of the ball 51, there is an advantage that the ore removal efficiency can be further improved.

The through hole may be formed on the side of the ball 51.

Further, in the smelting furnace of this embodiment, the ball 51 is used as the valve body, but the valve body may be a plate-like one.

[0027]

According to the present invention, a smelting furnace according to the present invention has a tuyere for air blowing which is open to a passage near a valve body and at a position between the valve body and the inside of the furnace body. Since the through hole is formed, by blowing air from the through hole toward the inside of the passage, the ore accumulated near the valve body can be blown off and removed.

Therefore, even if the punching rod is inserted into the tuyere, ore does not blow out, and the working environment around the tuyere can be improved as compared with the conventional smelting furnace.

[Brief description of the drawings]

FIG. 1 is a diagram showing a smelting furnace according to an embodiment of the present invention, and is a cross-sectional view of a main part showing a configuration near a tuyere.

FIG. 2 is a view showing a conventional smelting furnace, and is a cross-sectional view of a main part showing a configuration near a tuyere.

[Explanation of symbols]

 Reference Signs List 10 furnace body 20 tuyere 32 branch passage (passage) 51 ball (valve element) 52 valve seat 60, 160, 260 through hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihiko Igarashi 1-1 Nagisa Onahama, Iwaki City, Fukushima Prefecture Onahama Smelting Co., Ltd. In the Onahama Smelter Co., Ltd. (72) Inventor Taiichi Tanaka Nagisa Onahama, Iwaki City, Fukushima 1-1 Onahama Smelting Co., Ltd. Onahama Smelting Co., Ltd. (56) References JP-A-62-263937 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A smelting furnace wherein ore and air are blown into a solution in a furnace body from a tuyere to dissolve the ore in parallel with an oxidizing treatment of the solution. A valve seat is provided in a passage formed between the tuyere and the outside of the tuyere and the inside of the furnace main body, and a valve body for opening and closing the passage in cooperation with the valve seat is movable. The tuyere is provided with a through hole for air blowing, which is open to the passage at a position near the valve body and between the valve body and the inside of the furnace body. A smelting furnace characterized in that: