WO2017166975A1

WO2017166975A1 - Blowtorch for use in lateral blowing of submerged burning molten pool metallurgical furnace and metallurgical furnace having blowtorch

Info

Publication number: WO2017166975A1
Application number: PCT/CN2017/075502
Authority: WO
Inventors: 冯双杰; 李栋; 崔大韡; 张振民; 曹珂菲; 林屹; 陈学刚; 许良
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2016-04-01
Filing date: 2017-03-02
Publication date: 2017-10-05
Also published as: RU2706900C1; AU2017240929A1; EP3438590A1; PL3438590T3; EP3438590B1; EP3438590A4; AU2017240929B2

Abstract

A blowtorch (100) for use in lateral blowing of a submerged burning molten pool metallurgical furnace and the metallurgical furnace (1000) having the blowtorch. The blowtorch (100) comprises: an outer blow pipe (10), the outer blow pipe (10) being provided therein with an oxidizing gas inlet (11), an oxidizing gas outlet (12), and an insertion port (13); an insertion self-locking element (20) having a self-locking and closing function, the insertion self-locking element (20) being mounted at the insertion port (13) of the outer blow pipe; an inner blow pipe (30), the inner blow pipe (30) being provided with a medium inlet (31), a medium nozzle (32), and a medium clearing opening (33), the inner blow pipe (30) being detachably inserted on the insertion self-locking element (20), one extremity of the medium nozzle (32) on the inner blow pipe (30) being inserted into the outer blow pipe (10) via the insertion port (13), and the insertion self-locking element (20) self-locking and closing to block the insertion port (13) when the inner blow pipe (30) is detached from the insertion self-locking element (20); and a blocking element (40), the blocking element (40) being mounted on the inner blow pipe (30) to open or close the medium clearing opening (33). The blowtorch not only facilitates clearing of pulverized coal clogging the inner blow pipe (30), thus allowing the inner blow pipe (30) to be unclogged in a timely manner, but also obviates the need to lower the liquid level of a molten pool when the inner blow pipe is detached for maintenance and effectively ensures normal operation of the metallurgical furnace, thus increasing yield.

Description

Spray gun for side blown immersion combustion pool metallurgical furnace and metallurgical furnace having same

Technical field

The present invention relates to the field of metallurgical technology, and in particular to a spray gun for a side blown immersion combustion pool metallurgical furnace and a metallurgical furnace having the same.

Background technique

In the related art, the immersed side-blown molten pool smelting method is widely used in the fields of lead smelting, high lead slag reduction, regenerative lead smelting, slag smelting, and copper smelting. The immersed side-blown molten pool smelting method is to inject air, oxygen-enriched air and fuel into the molten pool through the tuyere or the spray gun on both sides of the furnace body, and the injected gas stirs the molten pool to accelerate the heat transfer and chemical reaction in the molten pool. For molten pool smelting of heat-generating materials, it is only necessary to feed air or oxygen-enriched air from the side air outlet; for molten pool smelting of non-heating materials, it is fed into the rich by a spray gun for side-blown immersion combustion molten metallurgical furnace. Oxygen air and fuel are immersed and the heat released is directly absorbed by the melt. The heating speed is fast and the heat utilization rate is high, which can quickly and effectively adjust the temperature of the molten pool.

At present, the side-blown furnace that uses the spray gun for side-blown immersion combustion pool metallurgical furnace to feed fuel into the molten pool for immersion combustion has the following disadvantages:

1. When replacing the spray gun used for side-blown immersion combustion pool metallurgical furnace, it is necessary to interrupt the operation and lower the liquid level in the molten pool below the spray gun. After the replacement, the liquid level in the molten pool should be raised to the preset height, which reduces the production. effectiveness.

2. The fuel delivered by the high-pressure spray gun for the side-blown immersion combustion pool metallurgical furnace is natural gas, producer gas, coke oven gas, etc., when used to transport pulverized coal, the pulverized coal passage in the spray gun is easily generated. In the phenomenon of blockage, it is necessary to pull out the spray gun used for the side blown immersion in the molten metallurgical furnace to carry out the dredging of the pulverized coal passage, which is inconvenient to maintain.

3. At present, the pressure of the spray gun for conveying pulverized coal used in the side-blown immersion melting pool metallurgical furnace is relatively low, resulting in poor cooling effect of the spray gun itself, not only reducing the service life of the spray gun used for the side blown immersion combustion pool metallurgical furnace. Moreover, the scouring of the side wall of the furnace body is more severe, and the side wall of the furnace body is severely burned.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes a spray gun for facilitating timely unblocking of the inner nozzle, for reducing the liquid level of the molten pool without dissolving the inner nozzle, and for effectively ensuring the normal operation of the metallurgical furnace, for the side blown immersion combustion pool metallurgical furnace.

The invention also proposes a metallurgical furnace having the spray gun.

A spray gun for a side-blown submerged combustion pool metallurgical furnace according to an embodiment of the first aspect of the present invention includes: an outer nozzle having a gas-assisted gas inlet, a gas-assisted gas outlet and a socket; and a self-locking closing function Inserting a self-locking member, the plug-in self-locking member is installed at a socket of the outer nozzle; an inner nozzle having a medium inlet, a medium nozzle and a medium cleaning port, wherein the inner nozzle can Removably inserted into the plug-in self-locking member, and one end of the inner nozzle having the medium nozzle extends into the outer nozzle through the socket, and the inner nozzle is disengaged from the plug The self-locking self-locking member is self-locking to close the socket; the blocking member is mounted on the inner nozzle to open or close the medium cleaning port.

The spray gun for the side blown immersion combustion pool metallurgical furnace according to the embodiment of the first aspect of the present invention not only facilitates cleaning of the clogging coal powder in the inner nozzle, but also enables the inner nozzle to be unblocked in time, and the inner nozzle is disassembled and repaired. It is not necessary to reduce the liquid level of the molten pool, effectively ensure the normal operation of the metallurgical furnace, and increase the production capacity.

Optionally, the first end of the plug-in self-locking member is detachably connected to the inner nozzle through a flange, and the second end of the plug-in self-locking member is weldedly connected to the outer nozzle.

Optionally, the plug-in self-locking member comprises: a first body, the first body defines a connecting passage through which the inner nozzle passes and communicates with the socket; and a first self-locking member, The first self-locking member is movably disposed in the first body between a closed position in which the connecting passage is closed and an open position in which the connecting passage is opened.

Optionally, the first body further defines a sliding slot communicating with the connecting passage, and the first self-locking member is pushed into the sliding slot by the inner nozzle when the inner nozzle is inserted into the connecting passage The first self-locking member drops into the connecting passage by gravity when the inner nozzle is disengaged from the connecting passage.

Optionally, a lower end of the sliding slot is in communication with the connecting passage and a length direction of the sliding slot is inclined with respect to a length direction of the connecting passage.

Optionally, the chute extends obliquely from bottom to top toward the outer nozzle.

Optionally, the first self-locking member is a ball.

Optionally, the blocking member comprises: a second body, the second body defines the clearing passage communicating with the medium cleaning opening; the second self-locking member, the second self-locking member is a closed position that closes the dredging channel and an open position that opens the dredging channel are movably disposed in the second body; and a stop for the second self-locking member to come out of the second body a plug, the plug is detachably mounted on the second body, and the plug is provided with a dredging port communicating with the dredging channel.

Optionally, the second body further defines a guiding groove communicating with the clearing passage, the lower end of the guiding groove is in communication with the clearing passage, and the guiding groove is opposite to the outer nozzle from the bottom to the top The length direction of the connecting passage extends obliquely.

A metallurgical furnace according to an embodiment of the second aspect of the present invention includes the spray gun for side-blown submerged combustion pool metallurgical furnace.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a spray gun for a side blown immersion combustion pool metallurgical furnace in accordance with an embodiment of the present invention.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1.

3 is a schematic cross-sectional view of a spray gun for a side blown immersion combustion pool metallurgical furnace in accordance with an embodiment of the present invention.

4 is a schematic illustration of a metallurgical furnace in accordance with an embodiment of the present invention.

Reference mark:

Spray gun 100, furnace body 200, metallurgical furnace 1000, combustion gas supply device 2000, medium supply device 3000,

Outer nozzle 10, combustion gas inlet 11, assist gas outlet 12, socket 13,

The self-locking member 20 is inserted, the first body 21, the connecting passage 211, the sliding slot 212, and the first self-locking member 22,

Inner nozzle 30, medium inlet 31, medium spout 32, medium cleaning port 33,

The blocking member 40, the second body 41, the clearing passage 411, the guiding groove 412, the second self-locking member 42, the plug 43 and the dredging opening 431.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A washing assembly of an embodiment of the present invention will be described below with reference to Figs.

A spray gun 100 for a side blow immersion combustion pool metallurgical furnace and a metallurgical furnace 1000 having the same according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 through 4.

As shown in FIG. 1, a spray gun 100 for a side blown immersion molten pool metallurgical furnace according to an embodiment of the first aspect of the present invention includes: an outer nozzle 10, a plug-in self-locking member 20, an inner nozzle 30, and a sealing member. 40.

The outer nozzle 10 has a combustion gas inlet 11, a combustion gas outlet 12 and a socket 13. The connector self-locking member has a self-locking closing function, and the plug-in self-locking member 20 is mounted at the socket 13 of the outer nozzle 10. The inner nozzle 30 has a medium inlet 31, a medium nozzle 32 and a medium cleaning port 33. The inner nozzle 30 is detachably inserted into the plug-in self-locking member 20, and one end of the inner nozzle 30 having the medium nozzle 32 passes through the socket. 13 extends into the outer nozzle 10 (see Figure 2).

When the inner nozzle 30 is disengaged and the self-locking member 20 is inserted, the self-locking member 20 is self-locked and closed to close the socket 13. The sealing member 40 is mounted on the inner nozzle 30 to open or close the medium cleaning port 33.

In normal operation, the socket 13 of the plug-in self-locking member 20 is in an open state and the medium cleaning port 33 of the blocking member 40 is in a closed state, and a combustion-supporting gas (such as oxygen-enriched air) enters the gas-injecting inlet 11 of the outer nozzle 10 The nozzle 10 flows inside the gap between the outer nozzle 10 and the inner nozzle 30, and finally is discharged through the gas outlet 12; the coal powder and the boosting air enter the inner nozzle 30 through the medium inlet 31, and the coal powder is The push of the booster wind flows through the inner spout 30 and eventually passes through the medium orifice 32. ejection.

When the inner nozzle 30 is blocked and needs to be unblocked, a dredge tool (such as a drill) is inserted from the blocking member 40 to open the medium cleaning port 33, and the operator does not need to pull the spray gun 100 out of the furnace body 200 of the metallurgical furnace 1000. The inner nozzle 30 can be quickly unblocked to ensure the smooth delivery of the coal powder without affecting the normal operation of the metallurgical furnace.

When the inner nozzle 30 is worn and damaged, and needs to be disassembled and replaced, the inner nozzle 30 and the blocking member 40 are integrally removed from the plug-in self-locking member 20 and from the outer nozzle 10 and the plug-in self-locking member 20 When the plug-in self-locking member 20 is self-locked and closed, the connecting passage 211 of the plug-in self-locking member 20 is blocked, thereby effectively preventing the loss of the combustion-supporting gas in the outer nozzle 10; meanwhile, the combustion-supporting gas inlet 11 continues to supply combustion-supporting gas. The gas increases the air volume of the combustion-supporting gas. At this time, the combustion-supporting gas flows through the entire outer nozzle 10, and the flow space becomes large. The increase of the combustion-supporting amount can keep the combustion-supporting gas always ejected at a stable speed, thereby effectively preventing the liquid in the molten pool. The phenomenon that the outer nozzle 10 is blocked by the backflow occurs. When replacing, the inner nozzle 30 is inserted into the plugging self-locking member 20 and the outer nozzle 10, and the inner nozzle 30 opens the self-locking device and extends into the outer nozzle 10, thereby reducing the amount of the combustion-supporting gas and restoring the inner nozzle The medium of 30 (pulverized coal and booster wind) is supplied and the spray gun is returned to normal operation. Thus, when the inner nozzle 30 is replaced, it is not necessary to stop the production of the metallurgical furnace and reduce the liquid level of the molten pool.

In summary, the spray gun 100 for side-blown immersion combustion pool metallurgical furnace according to an embodiment of the present invention not only facilitates cleaning of the clogging coal powder in the inner nozzle 30, so that the inner nozzle 30 is unblocked in time, and The nozzle 30 can be independently disassembled and replaced without replacing the molten pool level during the replacement, effectively ensuring the normal operation of the metallurgical furnace and increasing the production capacity. In addition, the combustion-supporting gas in the outer nozzle 10 plays a combustion-supporting role, and because of its fast flow speed, the inner nozzle 30 and the like can be cooled to a certain extent, which not only improves the service life of the spray gun, but also reduces the life of the spray gun. Burning of the metallurgical furnace wall.

In some embodiments, referring to FIG. 1, the first end of the plug-in self-locking member 20 and the second end of the inner nozzle 30 are detachably connected by a flange, and the second end of the self-locking member 20 is inserted. The outer nozzle 10 is welded. The first end of the inner nozzle 30 is threadedly coupled to the closure member 40 with an elastomeric seal therebetween.

In some embodiments, as shown in FIG. 3, the plug-in self-locking member 20 includes a first body 21 and a first self-locking member 22. The first body 21 defines a connecting passage 211 through which the inner nozzle 30 passes and communicates with the socket 13. The first self-locking member 22 is movable between a closed position of the closed connecting passage 211 and an open position of the open connecting passage 211. The ground is disposed in the first body 21. Thus, when the inner nozzle 30 extends into the socket 13 and passes through the connecting passage 211, the first self-locking member 22 is in the open position to ensure the normal operation of the inner nozzle 30 and the outer nozzle 10, when the inner nozzle 30 is When the connecting passage 211 is disengaged, the first self-locking member 22 is in a closed position to avoid the loss of the combustion-supporting gas in the outer nozzle 10.

Further, the first body 21 further defines a sliding slot 212 communicating with the connecting passage 211. When the inner nozzle 30 is inserted into the connecting passage 211, the first self-locking member 22 is pushed into the sliding slot 212 by the inner nozzle 30, and the inner nozzle 30 is inserted into the connecting passage 211. When the connecting passage 211 is taken out, the first self-locking member 22 falls into the connecting passage 211 by gravity. Thereby, the first self-locking member 22 can be moved and switched between the open position and the closed position, and the first self-locking member 22 can realize the self-locking of the plug-in self-locking member 20 without external assistance. The plug self-locking member 20 has a simple and compact structure and a low cost.

According to some embodiments of the present invention, as shown in FIG. 3, the lower end of the chute 212 is in communication with the connecting passage 211 and the longitudinal direction of the chute 212 is inclined with respect to the longitudinal direction of the connecting passage 211. It should be noted that "the lower end of the chute 212 is in communication with the communication passage" means that the chute 212 is always located above the communication passage when the spray gun 100 is applied on the metallurgical furnace 1000. Thereby, it can be ensured that the first self-locking member 22 can fall into the connecting passage 211 by gravity and block the connecting passage 211 when the outer nozzle 10 is fixed and the inner nozzle 30 is pulled out.

Optionally, the chute 212 extends obliquely from bottom to top toward the outer nozzle 10. Thus, when the inner nozzle 30 is inserted, the first self-locking member 22 can be pushed into the chute 212 more smoothly, and the jamming of the first self-locking member 22 when moving from the closed position to the open position is avoided.

In a specific embodiment, the first self-locking member 22 is a ball. Specifically, the cross section of the chute 212 and the connecting passage 211 are both circular, the diameter of the ball is the same as the diameter of the chute 212, and the diameter of the ball is larger than the diameter of the connecting passage 211. Thereby, the movement of the first self-locking member 22 between the closed position and the open position is smoother, and the reliability of the plug-in self-locking member 20 is enhanced.

According to further embodiments of the present invention, as shown in FIG. 3, the blocking member 40 includes a second body 41, a second self-locking member 42, and a plug 43.

The second body 41 defines a clearing passage 411 communicating with the medium cleaning opening 33. The second self-locking member 42 is movably disposed on the second body between the closed position of the closed dredging passage 411 and the open position of the open dredging passage 411. 41 inside. The plug 43 is used to stop the second self-locking member 42 from coming out of the second body 41. The plug 43 is detachably mounted on the second body 41 and the plug 43 is provided with a dredging opening 431 communicating with the dredging passage 411.

Thus, when the inner nozzle 30 is clogged, the dredge tool is inserted from the dredging port 431 on the plug 43, the dredge tool pushes the second self-locking member 42 and moves the second self-locking member 42 from the closed position to the open position. The dredge tool can be smoothly inserted into the inner spout 30 to unblock the inner spout 30. In addition, when the clogging is serious, the blocking member 40 can be directly detached from the second body, which further enhances the convenience of maintenance.

Further, as shown in FIG. 3, the second body 41 further defines a guiding groove 412 communicating with the dredging channel 411. The lower end of the guiding groove 412 is in communication with the dredging channel 411, and the guiding groove 412 is opposite from the bottom to the top toward the outer nozzle 10. It extends obliquely in the longitudinal direction of the connecting passage 211. Thereby, the unblocking tool can more smoothly push the second self-locking member 42 into the guide groove 412, thereby preventing the second self-locking member 42 from being stuck when moving from the closed position to the open position.

A metallurgical furnace 1000 according to an embodiment of the second aspect of the present invention includes the spray gun 100 for a side blow submerged combustion pool metallurgical furnace of the above embodiment. As shown in FIG. 4, specifically, the furnace body 200 of the metallurgical furnace 1000 is provided with a spray gun socket, and the spray gun is inserted into the metallurgical furnace through the spray gun socket. When working, the inner spray pipe 30 and the outer spray pipe 10 of the spray gun are immersed in the furnace body. In the molten pool, pulverized coal and a combustion-supporting gas are injected into the molten pool. In the actual production, the combustion-assisted gas is supplied to the gas-injecting gas inlet 11 of the outer nozzle 10 through the combustion-assisting gas supply device 3000, and the coal supply and the booster air are introduced into the medium inlet 31 of the inner nozzle 30 through the medium supply device 2000.

With the spray gun of the above embodiment, when the pulverized coal injection causes friction and wear on the inner nozzle 30, and needs to be repaired and replaced, it is not necessary to lower the liquid level in the molten pool to expose the spray gun to the outside of the molten pool (ie, without interrupting production), and the liquid in the molten pool is maintained. The height of the surface is constant, and the inner nozzle 30 is directly detached from the plug-in self-locking member 20 and pulled out from the outer nozzle 10 and the plug-in self-locking member 20, and the combustion-supporting gas in the outer nozzle 10 is enlarged. The air volume can ensure that the metallurgical furnace maintains production, and then the new inner nozzle 30 can be quickly replaced and the air volume of the combustion gas can be restored to normal, so that the metallurgical furnace can be normally produced.

In this way, when the inner nozzle 30 is replaced, the two processes of lowering the molten pool level before replacement and increasing the molten pool level after replacement are not required, and the working rate and productivity of the metallurgical furnace are greatly improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be in place One or more embodiments or examples are combined in a suitable manner. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A spray gun for a side blown submerged combustion pool metallurgical furnace, comprising:

An outer nozzle having a gas-assisted gas inlet, a gas-assisted gas outlet and a socket;

a plug-in self-locking member having a self-locking closing function, the plug-in self-locking member being mounted at a socket of the outer nozzle;

An inner nozzle having a medium inlet, a medium nozzle, and a medium cleaning port, wherein the inner nozzle is detachably inserted on the plug-in self-locking member, and the inner nozzle has the One end of the medium nozzle extends into the outer nozzle through the socket, and the plug self-locking member is self-locked to close the socket when the inner nozzle is disengaged from the plug;

a blocking member mounted on the inner nozzle to open or close the medium cleaning port.
The spray gun for a side-blown immersion molten pool metallurgical furnace according to claim 1, wherein the first end of the plug-in self-locking member and the inner nozzle are detachably connected by a flange. The second end of the plug-in self-locking member is welded to the outer nozzle.
The spray gun for a side-blown submerged combustion pool metallurgical furnace according to claim 1, wherein the plug-in self-locking member comprises:

a first body defining a connecting passage through which the inner nozzle passes and communicates with the socket;

And a first self-locking member movably disposed in the first body between a closed position enclosing the connecting passage and an open position at which the connecting passage is opened.
A spray gun for a side-blown submerged combustion pool metallurgical furnace according to claim 3, wherein said first body further defines a chute communicating with the connecting passage, said inner nozzle being inserted into said connecting passage The first self-locking member is pushed into the sliding slot by the inner nozzle, and the first self-locking member drops into the connecting passage by gravity when the inner nozzle comes out of the connecting passage.
The spray gun for a side-blown immersion molten pool metallurgical furnace according to claim 4, wherein a lower end of the chute communicates with the connecting passage and a length direction of the chute is opposite to the connecting passage The length direction is inclined.
A spray gun for a side-blown submerged combustion pool metallurgical furnace according to claim 5, wherein said chute extends obliquely from bottom to top toward said outer nozzle.
A spray gun for a side blown submerged combustion pool metallurgical furnace according to claim 4, wherein said first self-locking member is a ball.
A spray gun for a side blown immersion molten pool metallurgical furnace according to any one of claims 1-7, wherein the occluding member comprises:

a second body, the second body defining the clearing passage communicating with the medium cleaning port;

a second self-locking member, the second self-locking member is in a closed position for closing the dredging channel and opening the dredging channel The open position is movably disposed in the second body;

a plug for stopping the second self-locking member from coming out of the second body, the plug is detachably mounted on the second body, and the plug is provided with a communication channel The dredge.
The spray gun for a side-blown submerged combustion pool metallurgical furnace according to claim 8, wherein the second body further defines a guide groove communicating with the dredging passage, and the lower end of the guide groove is separated from the dredging The passages are in communication, and the guide grooves extend obliquely from the bottom to the top toward the outer nozzle relative to the length direction of the connecting passage.
A metallurgical furnace characterized by comprising a spray gun for a side-blown submerged combustion pool metallurgical furnace according to any one of claims 1-9.