JPH0913129A - Method for opening tuyere in horizontal type converter and device therefor - Google Patents

Abstract

PURPOSE: To provide a method for opening a tuyere of a converter for copper smelting, capable of reducing the damage to a tuyere brick at the time of opening the tuyere after completing copper-making stage and prolonging the service lives of the tuyere brick and a furnace. CONSTITUTION: On a truck shiftable along the tuyere arranged at a furnace wall of the converter, a tuyere opening jig which can reciprocatingly move and rotate and a driving part which can simultaneously or separately give the jig a rotating force and a hitting force, are arranged to open the tuyere by drilling and hitting with the rotating force of the tuyere opening jig, or only by drilling with the rotating force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a ventilation obstacle adhering to a tuyere of a horizontal converter used for blowing a copper or nickel matte or the like and opening the tuyere. Regarding the device.

[0002]

2. Description of the Prior Art For blowing copper or nickel matte, a horizontally oriented cylindrical horizontal converter generally called a Piers-Smith converter is used. In this horizontal converter, blown air is blown into the molten material in the furnace through dozens of tuyere provided in a row on the side wall to oxidize iron and sulfur for blowing. In the operation of this converter, there are a can-making period in which iron content in the early stage of smelting is removed into karami, and a copper-making period in which blister copper is obtained from the river thereafter, but during that period, it melts due to the cold air sent from the tuyere. Since the adhered matter is formed on the inner end portion of the tuyere which comes into contact with the material, which obstructs ventilation, the adhered matter must be removed appropriately.

The work of removing the adhering matter is carried out by a dedicated converter tuyere breaking machine, and a machine called a mechanical puncher is generally used as the breaking machine. That is, in the conventional breaker, a breaker jig having a plurality of breaker bars having a diameter slightly smaller than the tuyere diameter is installed in parallel on a bogie that can move along the tuyere, and the bogies are sequentially moved to break it. The rod was struck against the deposit in the tuyere, and the impact was used to open the tuyere.

[0004]

However, in the conventional opening method using the tuyere breaking machine, the tuyere brick is often damaged by the impact when the breaking rod hits the tuyere deposit, and the life of the tuyere brick is long. There is a problem that it has a significant adverse effect on. In particular, the tuyere opening work after the completion of the copper-making period has more solidified copper and iron and their oxides as the main components than the tuyere opening work during blowing, and These deposits need to be completely removed in preparation for the cycle operation. Therefore, the impact by the mechanical puncher during the tuyere opening work after the completion of the coppermaking period is larger than the impact during the tuyere opening work during blowing, and the impact damages the tuyere brick and affects the life of the brick. When the degree of wear of the tuyere bricks is significant, it has a great adverse effect on the life of the converter and is not a preferable method.

The present invention has been conceived in view of the problems of the prior art as described above, and reduces damage to the tuyere bricks due to the impact of the mechanical puncher at the time of opening the tuyere after the completion of the coppermaking period, and extends the life of the furnace. The present invention intends to propose a tuyere opening means for a horizontal converter that enables the above.

[0006]

In the tuyere opening means according to the present invention, the tuyere opening after the completion of the copper-making period is performed not only by the striking force of a conventional mechanical puncher but also by a force including at least a rotational force. As a method of opening a closed tuyere after completion of the coppermaking period of a copper smelting converter, a tuyere opening jig capable of reciprocating motion and rotating motion is preferably used. Force and striking force, at least a rotating force is applied, and the tuyere is opened by cutting and striking by the rotating force of the jig, and at least cutting by the rotating force of the jig.

The apparatus of the present invention includes a bogie movable along a tuyere provided on a furnace wall of a converter, a tuyere opening jig capable of reciprocating motion and a rotary motion, and the jig. Preferably, a driving unit for applying a rotating force and a striking force, at least a rotating force is provided, and the driving unit of the tuyere opening jig of this device is provided with a fluid pressure such as air pressure or hydraulic pressure, Alternatively, an electrically driven motor or a rock drill drive can be used. Further, it is also possible to integrally configure the bogie of the tuyere opening device described above and the bogie of the mechanical puncher that eliminates the blockage of the tuyere during blowing.

[0008]

According to the present invention, since the cutting opening can be made while rotating the tuyere opening jig, even if the opening by the striking force is used together, the tuyere opening by the striking force of the conventional mechanical puncher is involved. It is possible to remarkably reduce the impact force and prevent the tuyere brick from being damaged by the impact.

Further, when the tuyere is re-opened only by cutting with the turning force of the tuyere opening jig, the damage to the tuyere brick due to the impact at the time of opening the tuyere occurs when both the striking force and the turning force are used. However, in this case, since the time required for opening the tuyere increases, it is more effective to use the striking force and the rotational force together when there is a time constraint on the re-opening of the tuyere. . On the other hand, when there is no particular time restriction or when there is little time restriction, it is preferable that the tuyere reopening is performed only by the rotational force to reduce the impact on the tuyere brick.

Further, the bogie rail is shared by integrating the bogie of the tuyere opening device and the bogie of the mechanical puncher which has been conventionally used for preventing the tuyere from being blocked during blowing. It becomes possible.

[0011]

【Example】

Example 1 FIG. 1 is a schematic view showing an apparatus according to an example of the present invention. 1 is a converter, 2 is a tuyere, 3 is a work floor, 4 is a rail, 5 is a tuyere opening truck, and 6 is a tuyere opening. Jig, 7 is a jig driving unit, 8 is a mechanical puncher carriage, 9 is a mechanical puncher, and 10 is a mechanical puncher.
Is a breakthrough rod. Here, a case where the tuyere opening trolley of the present invention and a conventional mechanical puncher trolley are integrated and a driving unit of a rock drill is used as a jig driving unit will be described as an example.

That is, the tuyere opening device according to the present invention is
A tuyere opening trolley 5 and a mechanical puncher trolley 8 are integrally and continuously arranged on a rail 4 laid along the furnace wall of the converter 1 on the work floor 3, and the tuyere opening is formed on the tuyere opening trolley 5. Jig 6
And the jig driving unit 7 are installed. The tuyere opening jig 6 has a cutting blade at the tip, and the rod 6-1
It is connected to the jig driving section 7 via the so as to be movable back and forth.
Since the drive unit of the rock drill is used for the jig drive unit 7,
The tuyere opening jig 6 can use both a rotating force and a striking force. The tuyere opening trolley 5 integrated with the mechanical puncher trolley 8 is self-propelled, and its movement is controlled by remote control.

When the closed tuyere is opened after the copper-making period of the converter 1 is finished by the tuyere opening device having the above-mentioned structure, the tuyere opening carriage 5 is installed on the tuyere 2 provided in a line on the furnace wall of the converter. Each tuyere is opened by the tuyere opening jig 6 by using the rotating force and the striking force of the jig driving portion 7 in combination while moving on the work floor 3 along. When opening the tuyere, the tuyere opening jig 6 is moved forward by the jig driving unit 7 with the carriage stopped for each tuyere, and the turning force and the striking force are applied to the tuyere opening jig 6. The tuyere 2 is opened by applying. The mechanical puncher 9 is used as needed.

According to the tuyere opening device having the above structure, the tuyere 2 can be opened by the striking force and the rotary cutting.
The impact force can be reduced, the impact on the tuyere brick can be reduced, and the damage to the tuyere brick can be significantly reduced. Further, the tuyere can be opened only by the rotary cutting of the tuyere opening jig 6. In this case, although the time required for the opening is long, the impact on the tuyere brick can be considerably reduced, and thus the tuyere can be considerably reduced. It is possible to further reduce damage to the bricks.

Example 2 In a horizontal copper smelting converter with 56 tuyere having an inner diameter of 4.2 m, a length of 11.9 m, and an inner diameter of 42.9 mm, the tuyere brick was replaced and then 200 cycles of smelting were carried out. With the opening of the tuyere becoming difficult, the opening device of the present invention shown in FIG. 1 is used during the time from discharging the blister copper to loading the river, and the closing wing is caused by striking force and rotary cutting. The mouth was opened. As a result, the time required for opening all tuyere was 15 minutes, the deposits on each tuyere and its surroundings were sufficiently removed, and the tuyere brick was damaged very little. Confirmed from the results.

For comparison, a conventional tuyere breaker using a mechanical puncher (the outer diameter of the breaking bar is 5
using a breaker equipped with a breaker bar that is smaller in mm.
As a result of performing the tuyere breakthrough work similar to the above, it took 5 minutes to break all tuyeres and the tuyere brick was relatively damaged. Confirmed from.

[0017]

As described above, according to the present invention,
Cutting and hitting the tuyere reopening after the coppermaking period with rotational force,
Or because it can be done only by cutting, it is possible to greatly reduce the impact of the tuyere brick compared to the conventional opening method by only hitting, it is possible to greatly extend the life of the tuyere brick, and further extend the life of the converter. There is an effect that can be measured. In addition, the device of the present invention can share the rail for moving the bogie by integrally connecting the bogies of the mechanical puncher for preventing the tuyere from being blocked during the conventional blowing. Therefore, there is an effect that the equipment investment can be reduced and the installation space can be saved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 converter 2 tuyere 3 work floor 4 rails 5 tuyere opening trolley 6 tuyere opening jig 7 jig driving unit 8 mechanical puncher trolley 9 mechanical puncher 10 breaker rod

Claims (5)

[Claims] 1. A method for opening a closed tuyere after a coppermaking period of a copper smelting converter, wherein a tuyere opening jig capable of reciprocating and rotating motions, preferably a rotating force. A tuyere opening method for a horizontal converter, wherein a tuyere is opened by applying a striking force, at least a rotating force, preferably by cutting and striking by a rotating force of a jig, and at least cutting by a rotating force of a jig. 2. A device for opening a closed tuyere after the copper-making period of a copper smelting converter, which is movable along a tuyere provided on a furnace wall of the converter, A tuyere opening jig capable of reciprocating and rotating motions, and a blade for a horizontal converter, which is provided with a driving unit for applying at least a rotating force and a striking force to the jig. Mouth opening device. 3. The tuyere opening device for a horizontal converter according to claim 2, wherein a motor driven by fluid pressure such as air pressure, hydraulic pressure, or the like is used for the driving portion of the tuyere opening jig. 4. The tuyere opening device for a horizontal converter according to claim 2, wherein a driving portion of a rock drill is used as a driving portion of the tuyere opening jig. 5. A bogie of the tuyere opening device according to claim 2,
A tuyere opening device for a horizontal converter, which is integrated with a bogie of a mechanical puncher that eliminates blockage of tuyere during blowing.