JPS61288027A - Concentrate blowing apparatus for copper smelting converter - Google Patents

Abstract

PURPOSE:To facilitate handling at turning operation of converter, by inserting an inducing pipe for supplying concentrate, etc., compressedly to tuyere passage communicating to furnace main body to form annular air passage, and locking the inducing pipe to a tuyere freely removably. CONSTITUTION:A concentrate blowing apparatus 23 is fitted to the tuyere 22 arranged at side wall of a converter main body 21, and locking pin is locked to an engaging groove provided to inducing pipe of the apparatus 23 movably. Therefor the air passage 26 is formed between inducing pipe and inner circumference surface of a passage 3a of a converter main body part 3, to communicate it with a branch passage 4a connected to a blasting pipe 5. For engaging the apparatus 23 with the tuyere 22, position of a pin introducing part 33a of a mounting and dismounting part 8d is adjusted to an engaging pin 24 to penetrate it, handle is turned to turn the part 28d and the pin 24 is positioned at terminal end of a middle part 33b. In this way, the whole apparatus 23 is pushed in arrow (b) direction by elastic spring, the pin 24 is engaged with a terminal end locking part 33c to fix the apparatus 23 at the tuyere 22.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a concentrate injection device for injecting concentrate etc. into a converter from the tuyere of a converter for copper smelting.

``Prior art'' Copper smelting usually involves a melting process in which the raw copper concentrate is melted in a melting furnace and separated into sludge and sludge, and the sludge produced in this melting process is guided into a converter. A steelmaking process in which silicate ore is added to the steel and air is blown into it to oxidize it to produce blister copper, and the blister copper produced in this steelmaking process is refined in a refining furnace to improve its quality and then cast into an anode. A refining step and an electrolytic refining step of electrolytically refining the anode produced in this refining step are performed in order.

Incidentally, as the melting furnace for the melting process, a reverberatory furnace has been used for a long time because it can process a wide range of types and grades of ore and is relatively easy to operate.

However, reverberatory furnaces have the disadvantage of requiring a large amount of fuel and increasing fuel costs.

In addition, the exhaust gas from the furnace is subjected to a prescribed exhaust gas treatment to desulfurize it to prevent pollution. In that case, exhaust gas with a high SO1 concentration is led to a sulfuric acid plant and treated as concentrated sulfuric acid, and exhaust gas with a low SO1 concentration is led to a gypsum plant and treated as gypsum.Generally, however, gypsum plants are not equipped with This results in a huge amount of gas, and the exhaust gas treatment costs become expensive. Therefore, it is not preferable that a large amount of exhaust gas with a low SO6 concentration is formed.

However, in the reverberatory furnace, a large amount of combustion gas is generated to burn a large amount of fuel, and the gas generated by dissolving the ore is diluted by this large amount of combustion gas, so that S in the exhaust gas of the furnace is reduced.

, the concentration becomes very low. Therefore, the exhaust gas from the reverberatory furnace must be treated at a gypsum plant, and increasing the amount of dissolved material in the reverberatory furnace is disadvantageous in terms of exhaust gas treatment costs.

Therefore, in order to reduce fuel costs and exhaust gas treatment costs, the applicant first decided to melt part of the concentrate that should be melted in the reverberatory furnace in the converter of the copper manufacturing process. A technique was proposed.

This technique will be explained using FIGS. 5 and 6.

FIG. 5 shows a conventional conventional converter, and FIG. 6 shows a conventional example of a converter that has been improved in order to put the above-mentioned technology into practical use.

As can be understood from Fig. 5, a normal converter has a furnace main body l.
A large number of tuyeres 2 (approximately 50 locations) are fixedly installed at predetermined intervals on the side of the tube.

This tuyere 2 is for blowing air into the solution inside the furnace main body to oxidize the solution.
A straight tube-shaped main body 3 that penetrates the brick wall 1a and the iron plate wall 1b, and the outer end of the main body 3 (the end that protrudes outside the furnace main body l; in the figure, the right end 4).

The joint flat part 4 branches the passage 3a provided by the main body part 3 into two branch passages 4a and 4b.

Of the two branch passages 4a and 4b, one branch passage 4a is for feeding air, and an air pipe 5 is connected to its end. Also, the other branch passage 4b
is for removing the solution that has adhered and solidified to the inner end or inner peripheral surface of the main body 3 by inserting a punching rod (not shown) into the main body 3, and the end of the passage 3a When the punching rod is pulled out, the ball 6 falls onto the valve seat 7 as shown by the two-dot chain line in the figure.
A valve mechanism 8 is provided which automatically closes the passage.

As is clear from Figure 6, the improved converter is one that has been modified so that concentrate can be fed into the furnace through the tuyeres, that is,
A branch passage 9 for feeding new concentrate into the joint flat part 4 forming a part of the tuyere 2 is formed, and a concentrate transport pipe 10 is joined to the end of the branch passage 9 to form the main body part 3. Concentrate is supplied to the vicinity of the joint between the joint flat part 4 and the joint flat part 4, and this concentrate is passed through the blast pipe 5.
The air is fed into the furnace body 1 using air pressure.

In the converter shown in FIG. 6, the concentrate fed through the branch passage 9 is melted by the exothermic reaction of the solution in the furnace without being particularly heated using a burner or the like.

Therefore, the amount to be melted in the reverberatory furnace can be reduced by the amount melted in the converter, and the amount of fuel used in the reverberatory furnace can be saved accordingly.

In addition, since only 9 ri of fuel is burned in the converter, the amount of combustion gas generated is small. Therefore, in the converter, there is no problem such as the gas generated by melting the concentrate being diluted significantly by the combustion gas, and the exhaust gas of the converter can be maintained at a high SO1 concentration as before. Can be processed in a sulfuric acid plant. Therefore,
Compared to the case where the entire amount of concentrate to be melted is melted in a reverberatory furnace, the amount of exhaust gas to be treated at the gypsum plant is reduced, making it possible to reduce exhaust gas treatment costs.

``Problems to be solved by the invention'' However, as shown in Figure 6 above, simply
If the converter is modified, new problems will arise in terms of handling the converter, etc.

In other words, approximately 50 tuyeres 2 are normally provided for one converter, and because of the large number of tuyere 2, when remodeling an existing converter, the remodeling work is very time-consuming. Become.

As the name suggests, the converter is used to receive and take away the matte produced in the reverberatory furnace in the melting process, or to transfer the blister copper obtained by oxidizing the matte in the furnace to the refining furnace in the refining process. For example, move the furnace body l in the direction shown by the arrow (a) in Figure 6.
Rotate it about 90 degrees.

Therefore, as shown in FIG. 6, if the branch passage 9 is simply added to the tuyere 2 and the concentrate transport pipe 10 is integrally joined to the branch passage 9, when the furnace body l rotates, , the concentrate transport pipe 10 also rotates, and the concentrate transport pipe 10
In addition to the need to provide flexibility to the furnace body, the behavior of the concentrate transport pipe 10 should be fully considered to prevent the concentrate transport pipe 10 from interfering with surrounding equipment during rotation. A problem arises in that a large free space must be secured. In addition, since flexibility is imparted to the concentrate transport pipe IO, if a flexible hose made of synthetic resin or synthetic rubber is used as the concentrate transport pipe 10, the passage of the concentrate can be maintained in a straight line. I can't do it anymore,
As a result, friction between the inner surface of the transport pipe 1o and the concentrate being transported becomes intense, causing problems such as the transport pipe 10 being more likely to be damaged due to wear.

Furthermore, as shown in FIG. 6, if the branch passage 9 for feeding concentrate is provided at an angle with respect to the passage 3a of the main body 3 of the tuyere 2, the concentrate will flow into the inner surface of the passage 3a. This results in a violent collision, and as a result, a problem arises in that the life of the tuyere 2 is shortened.

This invention was made in view of the above-mentioned circumstances, and even when installed in an existing converter, the modification to the existing converter can be completed extremely easily, and the tuyere can be easily attached and detached. Therefore, when the converter is rotated, it can be removed to facilitate handling of the converter, and the free space around the converter can be minimized. Moreover, it is an object of the present invention to provide a concentrate blowing device with a new configuration that can prevent problems such as shortening of the life of the tuyere due to concentrate blowing.

"Means for Solving the Problems" In order to achieve the above-mentioned object, the concentrate blowing device according to the present invention is inserted into a passageway of the tuyere leading into the furnace body, and is inserted along the inner circumferential surface of the passageway. a guide pipe defining an annular air passage; a pumping device for pumping concentrate, etc. into the guide pipe; a locking pin protruding from the end of the lining; and a detachable part fixed to the guide pipe. It is essential to provide an attachment/detachment mechanism for attaching and detaching the guide pipe to and from the tuyere by engaging and disengaging the guide tube with the engagement groove.

``Function'' With such a configuration, even when reusing an existing converter, the modification to the existing converter can be accomplished by simply installing a locking pin protruding from the tuyere, making it extremely simple. I can do it.

In addition, the attachment/detachment mechanism may be configured to change the shape of the locking groove, for example, by making the locking groove into a notch groove having a pin introduction part and an intermediate part and having an approximately hook shape as in the embodiment described later. By devising a device, it is possible to easily engage and disengage the locking pin and the engagement groove, thereby making it easy to attach and detach the guide pipe to and from the tuyere. By removing the guide tube from the tuyere, the converter can be easily handled, and the free space around the converter can be minimized.

Moreover, in the face concentrate blowing device, an air layer (air curtain) is formed along the inner circumferential surface of the tuyere passage due to the air passage defined around the guide pipe, and the air Since the concentrate is blown out into the layer of air, the inner peripheral surface of the tuyere is protected by the layer of air. Therefore, problems such as shortening of the life of the tuyere due to collision of the concentrate with the inner circumferential surface of the tuyere are prevented.

In addition, when the concentrate blowout position and the air blowout position are formed concentrically and orderly in this way, air can be uniformly distributed over the entire inner circumference of the tuyere end that opens into the converter. This air flow and the blown out concentrate have the effect of blowing off the solution adhering to the tuyere end, which is uniformed over the entire inner circumference of the tuyere end, thereby increasing the rotation rate. This also effectively prevents the melt in the furnace from adhering to and solidifying at the end of the tuyere.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 and FIG. 2 each show a cross-sectional view of the main part of a converter equipped with a concentrate blowing device according to the present invention.

The converter 20 shown here has a concentrate blowing device 23 according to the present invention installed in a tuyere 22 disposed on the side of a furnace body 21.
is installed, and the tuyere 22 is installed through the concentrate blowing device 23.
The concentrate is injected into the solution (copper) in the furnace body 21, so that the concentrate can be melted in parallel with the oxidation and oxidation treatment of the coating produced in the reverberatory furnace in the previous process. Regarding the structure of the furnace body 21 and the configuration of the tuyere 22,
This is the same as the conventional product shown in FIG. 5, except that a locking pin 24 for locking the concentrate blowing device 23 is provided protruding from the outer periphery of the end (right end in FIG. 1) of 2.

That is, the furnace wall of the furnace body 21 is made up of a brick wall 1a and an iron plate wall 1.
b, and the tuyere 22 is connected to the brick wall 1 of the furnace body 21.
a and the iron plate wall 1b.
and a joint flat part 4 connected to the outer end of the main body part 3, and the joint flat part 4 branches the passage 3a provided by the main body part 3 into two branch passages 4a and 4b. I'm letting you do it. Of the two branch passages 4a and 4b, one branch passage 4a is connected to an air pipe 5 as in the case of FIG. In order to insert a punching rod (not shown) through the passage 3a, the end of the passage 3a is formed as if it were a straight extension, and a ball 6 falls onto the valve seat 7 at the end when the punching rod is pulled out. A valve mechanism 8 is provided which automatically closes the passage 4b.

The locking pin 24 is provided to protrude from the outer periphery of the end of the joint flat portion 4 on the side of the branch passage 4b so as to extend in the radial direction.

In this way, about 50 tuyeres 22 with protruding locking pins 24 are provided on the side of the furnace body 20 at appropriate pitches, as in the past. teeth,
As shown in FIG. 1, a concentrate blowing device 23 is installed,
Further, a suitable number of the remaining furnaces are equipped with a monitoring device 25 for monitoring the temperature state of the solution in the furnace body 21, as shown in FIG.

As shown in FIG. 3, the concentrate blowing device 23 has a straight tube shape and has an outer diameter smaller than the diameter of the passage 3a of the main body 3 of the tuyere 22, and is inserted into the passage 3a. A guide pipe 27 that defines an annular air passage 26 (see FIG. 1) between it and the inner peripheral surface of the main body 3.
The attachment fixed to the rear end of the guide pipe 27 (the right end in FIG. 3) is an auxiliary pipe 28, a concentrate supply hose 29 connected to the rear end of the auxiliary pipe 28, and this hose 29. A pressure feeding device (not shown) that feeds concentrate, solid fuel (pulverized coal), etc. into the guide pipe 27 by air pressure through the auxiliary pipe 28, and a handle for attachment and detachment fixed to the auxiliary pipe 28 3
0.

The auxiliary pipe 28 for attachment includes a communication pipe part 28a that serves to communicate the hose 29 and the guide pipe 27, and a part from the distal end of the communication pipe part 28a to the distal end side of the guide pipe 27 (the left end in FIG. 3). an intermediate enlarged diameter portion 28c that extends toward the guide tube 27 to form an elastic material storage portion 28b around the guide tube 27; It has a configuration including an extended attachment/detachment part 28d.

The removable part 28d has a cylindrical shape, and includes a heat-resistant rubber gasket 31 mounted inside the removable portion 28d.
1 toward the tuyere 22 side.
The attachment/detachment mechanism is configured in cooperation with the explosive material 32 etc. stored in the.

As shown in FIG. 4, on the distal end side of the detachable part 28d,
An engagement groove 33 that engages with a locking pin 24 protruding from the tuyere 22 is formed. As is clear from FIG. 4, the engagement groove 33 is a notched groove that is generally hook-shaped as a whole, and extends in the direction of extension of the detachable portion 28d (to the left in FIG. 4), and extends to the tip of the detachable portion 28d. Open pin introduction part 33a and the circumferential direction from the end of this pin introduction part 33a (vertical direction in Fig. 4)
It has a structure including an intermediate portion 33b extending from the intermediate portion 33b, and a terminal locking portion 33c extending from the terminal end of the intermediate portion 33b toward the tuyere 22 side.

As is clear from FIG. 3, the tip of the guide tube 27 (the left end in FIG. 3) is cut diagonally, and the rear end is chamfered on the inner peripheral surface side to form a tapered portion 27a. There is. The tapered portion 27a allows pulverized coal and concentrate to be fed as fuel from the concentrate supply hose 29 to be smoothly guided into the guide pipe 27 without colliding with the end face of the guide pipe 27. This was done in such a way that it would be easy to use.

The tip side of the packing 31 is formed into a curved surface that matches the end surface of the tuyere 22, and when the curved surface 31a comes into close contact with the end surface of the tuyere 22, the tuyere 22
The joint between the main body and the concentrate blowing device 23 is sealed.

The work of attaching and detaching the concentrate blowing device 23 to and from the tuyere 22 is easy. That is, when installing, the guide tube 27 is inserted into the passage 3a of the tuyere 22, the position of the pin introduction part 33a is aligned with the locking pin 24 on the tuyere 22 side,
The locking pin 24 may be inserted into the pin introducing portion 33a, and then the attachment/detachment portion 28d may be rotated by turning the handle 30 to position the locking pin 24 at the end of the intermediate portion 33b. Then, the entire blowing device 23 is pushed back in the direction of arrow (b) in FIG. 1 by the urging force of the explosive material 32.
As shown in FIG. 4, the locking pin 24 engages with the end locking portion 33c, and the blowing device 23 is fixed to the tuyere 22. When removing, first push the handle 30 slightly toward the tuyere 22 side, and then insert the engagement pin 24 into the terminal locking part 33.
After removing it from c, you can install it in the reverse order.

As is clear from FIG. 2, the monitoring device 25, like the concentrate blowing device 23, includes the aforementioned guide pipe 27, an auxiliary pipe 28, a handle 30, a packing 31, an explosive material 32, etc. It can be attached to and detached from the tuyere 22 by the same operation as the blowing device 23.

This monitoring device 25 has a transparent partition plate 35 made of heat-resistant glass attached to the rear end of the auxiliary pipe 28, and the temperature of the solution is determined from the color of the solution in the furnace body 2 through the partition plate 35. The temperature of the solution detected by the radiation thermometer 36 can be checked on a display device or a control device located at a remote location. has been done.

The monitoring devices 25 are disposed at an appropriate number of locations among the large number of tuyeres 22, and by integrating the detected values of each monitoring device 25, the temperature distribution of the solution in the furnace body 21 is determined. Care has been taken to make it clear.

A plurality of the concentrate injection devices 23 are installed depending on the amount of concentrate injection, etc., and in this case, the installation position is determined so that melting is carried out smoothly under appropriate circumstances.
It is set based on the detected value of 5.

Hereinafter, the handling and operation of the converter 20 described above will be explained.

Since the concentrate blowing device 23 can be easily attached and detached from the tuyere 22, it can be used to receive the copper produced in the melting process, or to send the blister copper produced in the furnace body 21 to the refining furnace for the next refining process. When the furnace body 21 is rotated through a predetermined angle for transfer, the concentrate blowing device 23 is removed from the tuyere 22. By doing so, it is possible to facilitate handling when rotating the furnace body 21, and the problem of having to secure a large empty space around the furnace body 21 is solved, and the converter 21 can be easily handled. It becomes possible to minimize the empty space secured around the converter 20 in order to avoid interference with surrounding equipment during rotation of the converter.

Then, in the case where the sludge produced in the previous process is placed in the furnace body 21 and the concentrate is melted in parallel with the oxidation treatment of the sludge, an appropriate number of sludge is placed in the furnace body 21. The concentrate blowing devices 23 are installed in the tuyere 22 in an appropriately distributed manner, and the monitoring device 25 is installed at one or several places, and then from each concentrate blowing device 23,
Concentrate or a mixture of concentrate and solid fuel such as pulverized coal is blown in with air pressure, and on the other hand, air is forced through the blast pipe 5. In this case, the amount of air pumped, the amount of solid fuel blown, the amount of concentrate blown, etc. are adjusted as appropriate based on the temperature distribution etc. detected by the monitoring device 25.

The situation inside the furnace body 21 when the concentrate is injected by the blowing device 23 will be explained as follows.
Since the injected concentrate is prevented from being diffused by the guide pipe 27 of the blowing device 23, it enters the furnace body 21 through approximately the central axis of the passage 3a that opens into the furnace body 21. Since the air passage 26 is formed in an annular shape around the guide pipe 27, an annular layer of air flow (air curtain) is formed around the outer periphery of the flow of the blown concentrate. The inner peripheral surface of the passage 3a is protected by the layer of air. Therefore, the injected concentrate is prevented from colliding with the inner circumferential surface of the passage 3a, and damage to the tuyere 22 due to collision of the concentrate is prevented, and the life of the tuyere 22 is extended.

Moreover, when the position where the concentrate blows out and the position where the air blows out are formed concentrically and orderly, the converter 2
Air is uniformly applied to the entire inner circumference of the opening end of the passage 3a that opens into the interior of the passageway 3a, and this air flow and the blown out concentrate remove the solution adhering to the opening end of the passage 3a. The effect of blowing off the melt is made uniform over the entire inner circumference of the passage 3a, and the melt in the converter 20 is effectively prevented from adhering to and solidifying at the ends of the siding.

Further, among the large number of tuyeres 22 installed in the furnace body 21, some of them are equipped with the blowing device 23, others are equipped with the monitoring device 25, and others are equipped with the blowing device 23. , nothing is attached and only air is pumped. In that case, the injected concentrate is melted by the heat of the melt in the furnace body and the combustion heat of the solid fuel injected together, without being particularly heated with a burner, etc.; It is not carried out all at once in the vicinity of the slats 22, but is carried out gradually as the solution is stirred by the airflow within the furnace body.

The melting of the concentrate and the combustion of the solid fuel will be explained as follows.

In the vicinity of the tuyere 22 where the concentrate and solid fuel are injected, it is not possible to secure enough air for the solid fuel to completely burn.
Therefore, since the solid fuel is in an incompletely combusted state, no significant temperature rise is observed, and no significant temperature difference occurs between the solid fuel and other tuyeres.

Then, the incompletely burned fuel is removed by stirring the solution.
It comes into contact with magnetite (Fe+O4) generated near the other tuyeres 22 into which only air is blown, and gradually burns. Therefore, the temperature distribution of the solution inside the furnace body will be kept almost uniform.Also, since sufficient air cannot be obtained near the tuyere 22 where the concentrate is blown, a large amount of F is produced along with CuzS.
eS remains without being oxidized. On the other hand, in the vicinity of the tuyeres 22 through which only air is blown, oxidation becomes excessive, and oxidation of some iron progresses to Fe50+. Then, by the stirring action of the solution by the air flow, the FeS and Fe
Contact with +Oi causes a reduction reaction shown by the following formula.

PeS +3 Fe50+ → 10FeO+SO As a result, the concentrate is melted and a high-quality product can be obtained.

In addition, the converter 20 is different from the conventional one with respect to the furnace body 21 and the tuyere 22.
There is only a locking pin 24 protruding from the outer periphery of the end of 2. Therefore, even when an existing converter is to be modified, the modification work can be completed extremely easily and at low cost.

The following two examples of actual operation of the converter 20 described above were carried out.

One type is the so-called continuous melting method, in which seed grain is first introduced from a reverberatory furnace, and then only air is blown through the tuyere 22 to improve the quality of the material to a finished white color. After that, without removing the coals from the reverberatory furnace, concentrate and solid fuel are continuously blown from the concentrate pouring device 23 to melt a predetermined amount of concentrate and oxidize it. Process.

In this case, the amount of air blown through the tuyere 22 is set to the minimum required for the combustion of the newly blown solid fuel, the melting of the concentrate, and its oxidation treatment. Care was taken to prevent further oxidation. According to this operating method, the quality of the grain in the furnace body 21 could be kept almost constant at all times, and stable operation could be performed.

The other method is to inject concentrate and solid fuel by a predetermined amount each time the sludge in the converter is discharged and new sludge is taken from the reverberatory furnace.In this case, The amount of air blown in from the tuyere 22 is greater than that in the case of the continuous melting type, so that in addition to the combustion of the solid fuel and the oxidation treatment of the blown concentrate, the oxidation treatment of the slag already in the furnace is carried out smoothly. , many settings were made.

Both of these methods were easy to operate and gave good results.

"Effects of the Invention" As is clear from the above description, the concentrate blowing device according to the present invention is inserted into a passageway of the tuyere that leads into the furnace body, and air is annularly formed along the inner peripheral surface of the passageway. A guide pipe defining a passage, a pumping device for pumping concentrate etc. into the guide pipe, engagement of a locking pin protruding from the end of the tuyere and a detachable part fixed to the guide pipe. It is essential to have an attachment/detachment mechanism for attaching and detaching the guide pipe to and from the tuyere by engaging and disengaging it from the groove, and even when reusing it in an existing converter, modifications to the existing converter cannot be made without the tuyere. All that is required is to protrude a locking pin from the mouth, making it extremely simple.

In addition, the attachment/detachment mechanism may be designed by devising the shape of the locking groove, for example, by making the locking groove into a notched groove having a pin introduction part and an intermediate part and having an approximately hook shape as in the embodiment. This makes it easy to engage and disengage the locking pin and the engagement groove, thereby making it easy to attach and detach the guide pipe to and from the siding, and when rotating the converter, the guide pipe By removing the converter from the tuyeres, the converter can be easily handled and the free space around the converter can be minimized.

Moreover, in the concentrate blowing device, an air layer (air curtain) is formed along the inner peripheral surface of the tuyere passage due to the air passage defined around the guide pipe, and the air curtain is formed along the inner peripheral surface of the tuyere passage. Since the concentrate is blown into the layer, the inner peripheral surface of the tuyere is protected by the layer of air. Therefore, inconveniences such as shortening of the life of the tuyere due to collision of the concentrate with the inner circumferential surface of the tuyere are prevented.

In addition, when the concentrate blowout position and the air blowout position are formed concentrically and orderly in this way, air can be uniformly distributed over the entire inner circumference of the side edge opening into the converter. The effect of blowing off the solution adhering to the tuyere end by this air flow and the blown out concentrate is made uniform over the entire inner circumference of the tuyere end, and the inside of the converter is This also effectively prevents the solution from adhering to and solidifying at the tuyere end.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views of essential parts of an embodiment of the present invention, Figure 3 is an enlarged view of the concentrate blowing device in Figure 1, and Figure 4 is viewed from the ■ arrow in Figure 3. 5 and 6 are sectional views of the main parts of a conventional converter, respectively. 1a...Brick wall, 1b...Iron plate wall,
3...Main part, 4...Joint flat part, 4a
・4b... Branch passage, 5... Air pipe,
6... Ball, 7... Valve seat, 8...
... Valve mechanism, 20 ... Converter, 21 ...
・Furnace body, 22...tuyere, 23...concentrate blowing device, 24...locking pin, 25...
... Monitoring device, 26 ... Air passage, 27.
...Guiding pipe, 28...Auxiliary pipe for installation, 28a...Communication pipe section, 28b...Resilient material storage section, 28c...・・・Intermediate enlarged diameter part, 28d・
...Detachable part, 29... Concentrate supply hose,
30...Handle, 31...Putskin, 32...Bullet material, 33...Engagement groove,
33a...Pin introduction part, 33b...Intermediate part, 33c...Terminal locking part, 35...
・Transparent partition plate, 36... Radiation type thermometer.

Claims (1)

[Claims] A concentrate injection device that is attached to a tuyere of a converter for copper smelting and injects concentrate or concentrate and fuel into the converter from the tuyere, the passage leading into the furnace body of the tuyere. a guide pipe that is inserted into the guide pipe and defines an annular air passage along the inner circumferential surface of the passage; a pumping device that pumps concentrate, etc. into the guide pipe; A converter for copper smelting, characterized in that the converter for copper smelting is equipped with an attachment/detachment mechanism for attaching and detaching the guide tube to the tuyere by engaging and disengaging a locking pin and an engagement groove of an attachment/detachment portion fixed to the guide tube. concentrate blowing equipment.