JPS6342124Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to ore feeding equipment for a copper making furnace that prevents deposits from adhering to the tip of the top blowing lance in the copper making furnace.

[Conventional technology]

In the process of refining metals such as copper, in order to increase the purity of the metal, solid raw materials such as melt and air are blown into the molten metal in the copper making furnace from a top blowing lance, thereby oxidizing impurities. Impurities are removed from the molten water by creating a turbidity.

Conventionally, as ore feeding equipment for copper making furnaces using this type of top-blowing lance, there is ore feeding equipment A for copper making furnaces shown in FIG. The ore feeding equipment A of the copper making furnace includes air lances 1 to 4 for blowing air, a raw material transport pipe 6 for transporting the solid raw material in the ore feed tank 5, and the upper end of the raw material transport pipe 6 is connected to the air lance 1 to 4 for blowing air. The solid lance 7 is inserted into the pipe of the air lance 3 and has its lower end inside the pipe of the air lance 3. The ore feeding equipment A of this copper making furnace transports the solid raw material stored in the ore feed tank 5 through the raw material transport pipe 6 and the solid lance 7, and transports the solid raw material stored in the ore feed tank 5 into the copper making furnace 8 together with the air transported by the air lance 3. The air transported by the air lances 1, 2, and 4 is also blown onto the molten metal 9 in the same manner.

[Problem that the invention attempts to solve]

However, in the ore feeding equipment A of the copper making furnace described above, the transport air that blows out the solid raw material and air from the air lances 1 to 4 and the solid lance 7 is at high pressure, so the solid raw material and air flow at high speed. . Therefore, the molten water 9 into which they are directly blown
A large amount of splash is generated from the surface of the air lance, and this splash adheres to the tips of the air lances 1 to 4 and is cooled to form deposits 10, 10, . . . . These deposits 10, 10, ... accumulate and grow over time, and eventually become air lances 1 to 10.
4 to the point where it even blocks the opening at the tip. Such a phenomenon is more common in air lances 1, 2, and 4 than in air lance 3. This is because the air lance 3 blows out the solid raw material together with the air at high speed, and this solid raw material blows out at the air lance 3.
This is to prevent the deposition and growth of deposits 10, 10, . . . on the opening 13. On the other hand, in the air lances 1, 2, and 4, since there is no blowout of the solid raw material as described above that prevents the growth of the deposits 10, 10, . . . , the deposits 10, 10, . . . continue to grow, and eventually the air Opening 1 of lances 1, 2, 4
1, 12, and 14 are now blocked. These deposits 10, 10, . . . cause operational troubles, so they must be removed in advance or periodically. Conventionally, to remove the deposits 10, 10, . A method is being used to remove the

However, in the above method, the deposits 10,
10, ... is carried out in parallel during operation, so the deposits 1 on the tips of air lances 1 to 4 are
It is not possible to directly hit the deposits 10, 10, . . . , so it takes time to remove the deposits 10, 10, . . . and it is not possible to completely remove them. In addition, deposits 10,1
Since the removal of 0,... is done manually,
There is a problem in that it places a heavy burden on workers.

This invention was made in view of the above-mentioned circumstances, and the problem is how to realize ore feeding equipment for a copper-making furnace that can eliminate the above-mentioned drawbacks.

[Means for solving problems]

This invention is an ore feeding equipment for a copper making furnace that blows solid raw materials and air into the copper making furnace using a top blowing lance, and includes a plurality of air lances that blow air, a raw material transport pipe that transports the solid raw materials, A plurality of solid lances are branched from the end of the raw material transport pipe, each inserted into the air lance pipe, and the lower end of which is located within the air lance pipe; It consists of a valve that selectively supplies raw materials to the

〔Example〕

Examples of this invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of ore feeding equipment B for a copper making furnace, and in this figure, reference numeral 15 indicates the copper making furnace.

The upper part of the copper making furnace 15 is covered with a ceiling 16, and molten metal 17 is stored inside. Tubular air lances 19, 19, . . . are fixed above the molten metal 17, passing through the ceiling 16 and connected to the air transport pipes 18, 18, . . . . Tubular solid lances 20, 20, . . . are inserted into the tubes, respectively. The lower ends of the solid lances 20, 20, . . . are located in the air lances 19, 19, . It has a similar structure. The raw material transport pipe 21 is formed into a tubular shape, and is bent in the middle to become horizontal. A horizontal portion of the raw material transport pipe 21 communicates with an ore supply tank 22, and a rotary valve 23 is provided in this communication portion. This rotary valve 23 is adapted to adjust the amount of solid raw material supplied from the ore feed tank 22 to the raw material transport pipe 21. On the other hand, the solid lance 2
At the upper end of 0, 20, ..., valves 24, 2
4, . . . are provided, and the opening and closing thereof can be controlled by a control device 25.

The operation and usage of the copper-making furnace ore feeding equipment B having the above configuration will be explained. First, the rotary valve 23 is opened, and the solid raw material in the ore feed tank 22 is appropriately supplied to the raw material transport pipe 21. The solid raw material supplied to the raw material transport pipe 21 is transported in the direction of arrow a by high pressure transport air flowing inside the pipe. Next, the control device 25 is connected to the valves 24 and 2.
4, . . . are set to open sequentially at regular intervals. As a result, the solid raw material transported by the raw material transport pipe 21 flows into one solid lance 20 and further flows into the air lance 19.
By this air lance 19, solid lance 20
The raw material sent through is blown into the molten metal 17 together with high-pressure air sent through the air transport pipe 18. In addition, the air lance 19, which does not allow solid raw materials to flow into it,
19, 19 blow only the air transported by the air transport pipes 18, 18, 18 into the molten metal 17. On the other hand, the flow of these solid raw materials and air becomes high speed, and a large amount of splash is generated from the surface of the molten metal 17, and this splash grows to the extent that it blocks the tips of the air lances 19, 19, . . . . However, the control device 25
4, 24, . . . are sequentially opened at regular intervals to change the air lance 19 through which the solid raw material flows, the deposits 26, 26, . It will be done.
In addition, the openings of these valves 24, 24,...
Air lances 19, 19, . . . need to be opened frequently to prevent blockage of the tips. On the other hand, if the opening time is short, the deposits 26, 26, . . . cannot be completely removed, so control is required. Setting of the opening time of the valves 24, 24, . . . by the device 25 is as follows:
It is necessary to carry out the process appropriately depending on the adhesion status of the deposits 26, 26, . . . .

In the ore feeding equipment B of the copper making furnace as described above,
The control device 25 sequentially opens the valves 24, 24, . . . , and the solid material sent by high-pressure transport air sequentially blows off the deposits 26, 26, . . . on the tips of the air lances 19, 19, . , it is possible to remove the deposits 26, 26, ... while the copper furnace is in operation, and it can be done more reliably than conventional removal by workers, reducing the burden on the workers. There are advantages such as being able to

[Effect of idea]

According to the ore feeding equipment for a copper making furnace using top-blown lances in this invention, solid lances branched from a raw material transport pipe for transporting solid raw materials are inserted into each of the plurality of air lances for blowing air, and these solid lances a lower end is located within the air lance tube,
On the other hand, valves are provided at the upper end, and since the solid raw materials can be selectively fed into the solid lance by these valves, deposits can be removed while the copper making furnace is in operation. Moreover, it has the advantage of being able to remove deposits more reliably than conventional manual removal methods, and of reducing the burden on the operator.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the configuration of ore feeding equipment for a copper making furnace shown as an embodiment of this invention, and Figure 2 is a diagram showing the ore feeding equipment for a copper making furnace shown as a conventional example. be. B, B...Ore feeding equipment for copper making furnace, 19...Air lance, 20...Solid lance, 21...Raw material transport pipe, 24...Valve.

Claims (1)

[Scope of utility model registration request] A copper-making furnace feeding equipment that blows solid raw materials and air into a copper-making furnace using a top blowing lance, which includes multiple air lances that blow air, a raw material transport pipe that transports solid raw materials, and this raw material transport pipe. A plurality of solid lances are branched from the ends of the solid lances, each of which is inserted into the air lance pipe, and the lower end of which is located within the air lance pipe. Ore feeding equipment for a copper making furnace, which is equipped with a selective supply valve.