JPH062096U - Smelting furnace - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a smelting furnace capable of preventing blowout of ore from the tuyere. Since a through hole 60 for blowing air is formed in the tuyere 20, a nozzle or the like connected to a pump is attached to the through hole 60 before the punching rod 40 is inserted into the branch passage 32. By blowing air from the inside toward the inside of the passage 32, the ore accumulated in the vicinity of the valve body 51 can be blown off and removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a smelting furnace used for smelting metals such as copper, and more particularly to a smelting furnace capable of melting ore in parallel with the oxidation treatment of a solution.

[0002]

[Prior art]

 For example, in the smelting of copper, copper ore, which is a raw material, is melted and separated into kawa and kalami, and oxygen-enriched air is blown into the kawa to oxidize it to improve the purity of metallic copper. I am trying to do it.

As a smelting furnace used for the above-mentioned smelting of copper, ore is introduced into the smelting furnace together with oxygen-enriched air, and the ore is melted in parallel with the oxidation treatment of the river. Techniques for doing this have already been proposed.

The configuration of the smelting furnace used in this technique will be described with reference to FIG.

In this smelting furnace, a large number (about 50 places) of tuyere 20 is fixedly installed on a side portion of a furnace body 10 that is configured to be rotatable at predetermined intervals.

The tuyere 20 is for blowing air into the solution (kawa) of the furnace body 10 to oxidize the solution, and has a straight tubular body 21 that penetrates the side wall of the furnace body 10. A first joint 22 which is connected to an outer end (right end in FIG. 2) of the main body 21 and branches the main passage 30 supplied by the main body 21 into two branch passages 31 and 32. The second joint 23 is connected to the outer end of the first joint 22 and further divides the branch passage 31 into two branch passages 33 and 34.

The one branch passage 33 provided in the second joint 23 is for feeding air toward the inside of the furnace body 10 through the branch passage 31 and the main passage 30, and has an end portion for blowing air. It is connected to a main pipe (not shown).

The other branch passage 34 is for supplying ore to the branch passage 33, and is connected to an ore charging pipe (not shown) at the end thereof. The ore charged from above is sent into the inside of the furnace body 10 via the branch passage 31 and the main passage 30 by the pressure of the air sent from the branch passage 33.

The branch passage 32 provided in the first joint 22 removes the melt adhered and solidified on the inner end portion or the inner peripheral surface of the main body 30 by inserting the punching rod 40 into the main body 30. The main passage 30 is formed as if the end portion of the main passage 30 were extended straight. At the outer end of the branch passage 32, a ball 51 is normally placed on the valve seat 52 to close the passage, and when the punching rod 40 is abutted against the ball 51, the ball 51 moves toward the valve seat 52. A valve mechanism 50 is provided which ascends to a standby position provided above (two-dot chain line in FIG. 2) and allows the punching rod 40 to be inserted therethrough.

In the above-mentioned conventional smelting furnace, since the branch passage 32 is configured to extend straight from the main passage 30, the rod-shaped punching rod 40 may be inserted from the branch passage 32 into the main passage 30. This has the advantage that the above-mentioned solution removal work can be performed.

In the conventional smelting furnace, since the branch passage 32 is extended straight from the main passage 30, the branch passage 31 is slightly inclined with respect to the extension direction of the main passage 30. It is configured. For this reason, the flow of air blown from the branch passage 33 becomes a little turbulent at the joint between the main passage 30 and the branch passage 31 (in the vicinity of the outer end of the main body 21), and the flow toward the inside of the branch passage 32 is increased. It will happen. Then, a part of the ore charged from the branch passage 34 may enter the inside of the branch passage 32 and stay in the vicinity of the inside of the ball 51 forming the valve mechanism 50.

As described above, when the ore stays in the vicinity of the ball 51, the punching rod 40 is abutted against the ball 51 and the ball 51 is moved from the valve seat 52. There was a problem that ore blows out from the gap created between the two and is scattered to the outside and the work environment deteriorates.

[0013]

[Problems to be solved by the device]

 The present invention has been made in view of the above circumstances, and an object thereof is to provide a smelting furnace capable of preventing blowout of ore.

[0014]

[Means for Solving the Problems]

 In the smelting furnace according to the present invention, the tuyere is provided with a through hole for blowing air, which is open to the passage in the vicinity of the valve body and between the valve body and the inside of the furnace body. It has a composition that

[0015]

[Action]

 According to the smelting furnace of the present invention, since the tuyere has the through hole for blowing air, the nozzle connected to the pump is attached to the through hole before inserting the punching rod into the branch passage. By blowing air from the through hole toward the inside of the passage, the ore retained near the valve body can be blown off and removed.

[0016]

【Example】

 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 conventional smelting furnace described above will be denoted by the same reference numerals and detailed description thereof will be omitted.

In the smelting furnace according to the present embodiment, the first joint 22 forming the tuyere 20 communicates with the outside at a position above the ball (valve body) 51 and is inclined slightly upward. This is different from the conventional smelting furnace in that a through hole 60 for blowing air is formed and a residue removal pipe 61 is fitted into the through hole 60. As a result, in the smelting furnace of the present embodiment, the penetrating passage opened to the branch passage (passage) 32 at a position near the ball 51 and between the ball 51 and the inside of the furnace body 10. The hole 60 is formed.

In the smelting furnace according to the present embodiment, before inserting the punching rod 40 into the inside of the branch passage 32, the residue removal pipe 61 is provided with a nozzle connected to an air supply device such as a pump. The air is injected into the branch passage 32 intermittently or continuously. As a result, the ore remaining near the inside of the ball 51 can be blown off to the inside of the furnace body 10.

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

At this time, in the conventional smelting furnace, there was a problem that the ore accumulated in the vicinity of the balls 51 was blown out from the tuyere, but according to the smelting furnace of the present embodiment, the punching rod was used. Since the ore remaining in the vicinity of the ball 51 can be blown off before the 40 is inserted, when the punching rod 40 is inserted, the ore is almost not present in the vicinity of the ball 51. ing.

Therefore, even if the punching rod 40 is inserted, the ore is not blown out, so that there is an advantage that the working environment around the tuyere can be improved as compared with the conventional case.

The other operations are similar to those of the conventional smelting furnace, and therefore the description thereof is omitted.

In the smelting furnace of the above-described embodiment, the through hole 60 was formed above the ball 51 with a slight inclination, but as shown by the alternate long and short dash line in FIG. The through hole 160 may be formed by extending 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 to form a vortex, it is necessary to blow the air from above onto the ore retained in the vicinity of the ball 51. it can. For this reason, it becomes possible to blow even the ore that is hidden by the ball 51 and tends to remain near the bottom of the ball 51, and the efficiency of ore removal can be improved.

Further, the through hole may be a through hole 260 formed in the vicinity of the bottom of the ball 51, as shown by the chain double-dashed 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.

In addition, it goes without saying that the through hole may be formed on the side of the ball 51.

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

[0027]

[Effect of device]

 In the smelting furnace according to the present invention, the tuyere is provided with a through hole for blowing air, which is open to the passage in the vicinity of the valve body and between the valve body and the inside of the furnace body. With such a structure, by blowing air from the through hole toward the inside of the passage, the ore retained near the valve body can be blown away and removed.

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

[Brief description of drawings]

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

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

[Explanation of symbols]

 10 furnace body 20 tuyere 32 branch passage (passage) 51 ball (valve body) 52 valve seat 60/160/260 through hole

Front page continued (72) Inventor Toshihiko Igarashi 1-1, Onahama, Onahama, Fukushima Prefecture Onahama Smelting Co., Ltd. (72) Inventor, Taiichi Tanaka 1-1, Onahama, Onahama, Iwaki, Fukushima Prefecture Onahama Smelter & Refinery Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A smelting furnace in which ore and air are blown from a tuyere into a solution in a furnace body so that the ore can be melted in parallel with the oxidation treatment of the solution. A valve seat is provided inside a passage formed in the interior of the furnace body for communicating the outside of the tuyere with the inside of the furnace body, and a valve body that cooperates with the valve seat to open and close the passage is movable. Provided in the tuyere is a through hole for blowing air, which is open to the passage in the vicinity of the valve body and between the valve body and the inside of the furnace body. Smelting furnace characterized by that.