CN216237134U - Tapping device for smelting reduction furnace - Google Patents

Abstract

The application discloses a tapping device for a smelting reduction furnace, which comprises a shell, wherein a connecting channel is formed in the side wall of the shell and is used for communicating a furnace body of the smelting reduction furnace with an accommodating cavity in the shell; the accommodating cavity is cylindrical; the side wall of the shell is provided with a molten iron outlet which is higher than the connecting channel. When molten iron enters the containing cavity of the tapping device from the smelting reduction furnace, a circulation flow is formed, so that the direct scouring of the molten iron on the inner wall of the containing cavity is greatly reduced, the impact resistance is improved, and the service life of the tapping device is greatly prolonged.

Description

Tapping device for smelting reduction furnace

Technical Field

The application relates to a tapping device for a smelting reduction furnace, and belongs to the technical field of smelting reduction.

Background

The HIsmelt smelting reduction process takes a smelting reduction furnace as a core, and produces high-quality pure iron by directly blowing iron ore powder and non-coking coal into a liquid molten iron molten pool in the smelting reduction furnace. Compared with the traditional blast furnace ironmaking process, the smelting reduction process has lower requirements on raw materials, two links of sintering and coking are omitted, and a large amount of investment and operation cost can be saved by the smelting reduction process under the condition of the same productivity.

The tapping mode of the tapping hole of the blast furnace needs frequent operation and the continuous use of stemming, which causes the problems of different depths of the tapping hole, overlong leakage points and difficult tapping or difficult plugging of the tapping hole even if the tapping hole is repeatedly operated for a long time; more importantly, the existing tap hole is blocked before tapping, the iron bath method smelting reduction reaction is a violent dynamic chemical reaction iron liquid in a gushing state, and the existing tap hole can not or is difficult to bear the dynamic impact of the smelting reduction reaction, so that the phenomenon of cracking can occur, and even accidents can occur.

Therefore, the melting reduction furnace in the HIsmelt melting reduction process is provided with the special tapping device, the bottom of the tapping device is communicated with the melting reduction furnace, the tapping channel of the tapping device and the tapping channel of the melting reduction furnace form a U-shaped tubular structure channel, and the molten iron in the melting reduction furnace is discharged by utilizing the siphon tapping principle.

However, the existing tapping device has some problems in the using process, when molten iron enters the tapping device from a tapping channel of the melting reduction furnace, the molten iron generates large impact force on the tapping device, and the edge angle exists on the inner wall of an accommodating cavity of the tapping device, so that the molten iron directly erodes the inner wall of the accommodating cavity, and the service life of the tapping device is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the application provides the tapping device for the smelting reduction furnace, when molten iron enters the accommodating cavity of the tapping device from the smelting reduction furnace, a circulation flow is formed, the direct scouring of the molten iron on the inner wall of the accommodating cavity is greatly reduced, the impact resistance is improved, and the service life is greatly prolonged.

The technical scheme of the application is as follows:

a tapping device for a smelting reduction furnace comprises a shell, wherein a connecting channel is formed in the side wall of the shell and is used for communicating a furnace body of the smelting reduction furnace with an accommodating cavity in the shell;

the accommodating cavity is of a vertically arranged cylindrical structure;

the side wall of the shell is provided with a molten iron outlet, and the molten iron outlet is higher than the connecting channel.

The containing cavity is designed to be of a cylindrical structure, and the inner wall of the containing cavity is of a curved surface structure, so that molten iron forms a circulation in the containing cavity, direct scouring of the molten iron on the inner wall of the containing cavity is reduced, impact resistance of the containing cavity is improved, and the service life of the containing cavity is greatly prolonged.

Optionally, the molten iron outlet and the connecting channel are arranged on two sides of the central axis of the cylindrical containing cavity.

Optionally, the top of casing is equipped with dust removal structure, dust removal structure is equipped with the smoke and dust passageway that the dust excluding hood encloses, the dust excluding hood is equipped with smoke and dust entry and smoke and dust export, the smoke and dust entry is used for the intercommunication hold the chamber with the smoke and dust passageway.

Optionally, the top of casing is equipped with the installation department that extends to the periphery, dust removal structure includes the mount pad and establishes the dust excluding hood at the mount pad top, mount pad fixed connection the installation department, the smoke and dust entrance is equipped with first hinge structure, the top of mount pad be equipped with first hinge structure matched with second hinge structure for the dust excluding hood can cover and close hold on the chamber.

Optionally, the dust excluding hood extends and the slope sets up to the top of molten iron discharge port, anti-oxidation material adds the device is installed to the dust excluding hood lateral wall of smoke and dust entry top, anti-oxidation material adds the discharge gate of device and extends to the top of holding the chamber.

Optionally, the molten iron outlet extends upward to the top of the mounting portion, an anti-oxidation material stopper is arranged on the inner side of the molten iron outlet, two ends of the anti-oxidation material stopper abut against the inner side wall of the mounting portion, the bottom of the anti-oxidation material stopper is not higher than the bottom of the molten iron outlet, and the top of the anti-oxidation material stopper is not lower than the top of the molten iron outlet.

Optionally, connect the passageway and include even section and horn mouth section, the horn mouth section includes macrostoma end and macrostoma end, macrostoma end is close to hold the chamber setting, the macrostoma end with even section links to each other, the horn mouth section includes bottom surface and top surface, the top surface is arc curved surface structure, the bottom surface is planar structure, just the tip that the bottom surface is close to holding the chamber is higher than the tip that is close to even section.

Further, the bottom surface and the horizontal plane form a first included angle, and the first included angle is 1-15 degrees.

Optionally, the overflow structure comprises an overflow cofferdam and an overflow pipe, the overflow cofferdam is arranged at the top of the shell, the installation part is arranged on the periphery of the top of the overflow cofferdam, the overflow pipe is arranged on the side wall of the shell, the overflow cofferdam is arranged above the plane where the bottom of the molten iron discharge port is located, an overflow molten iron outlet is arranged on one side of the overflow cofferdam, and the top of the overflow pipe is communicated with the inner side of the overflow cofferdam;

preferably, the overflow molten iron outlet is positioned at the top of the molten iron discharge port and is communicated with the molten iron discharge port.

Optionally, the casing lateral wall still is equipped with an inspection manhole, the inspection manhole is equipped with the spray gun jack, the spray gun jack is just right connect the passageway.

Optionally, still include the level gauge, the dust excluding hood lateral wall of smoke and dust entry top is equipped with a horizontal segment lateral wall, the level gauge is established perpendicularly on the horizontal segment lateral wall.

Benefits that can be produced by the present application include, but are not limited to:

1. the application provides a tapping device for smelting reduction furnace holds the chamber and is cylindric structural design, and its inner wall is the curved surface structure for the molten iron forms the circulation in its inside, has reduced the molten iron and to holding the direct washing away of intracavity wall, has improved its impact resistance ability, has prolonged its life greatly.

2. The application provides a tapping device for smelting reduction furnace, need pour into the molten iron into this device when smelting reduction furnace starts, with establish the molten iron stock fast in smelting reduction furnace, with satisfy smelting reduction reaction required condition, help making slag and utilize gushing spring effect splash slag to the water-cooling wall that the jetting formed in the short time, reduce the heat load, and then improve jetting volume as early as possible, go out iron as early as possible, prevent that the chamber that holds of casing from freezing with the interface channel of furnace body, consequently, the dust excluding hood rotates through the cooperation of first hinge structure and second hinge structure and rises, in order to make things convenient for the molten iron to pour into smelting reduction furnace through this device.

3. According to the tapping device for the smelting reduction furnace, the anti-oxidation material adding device is arranged, and anti-oxidation materials in the device can be added to the top of molten iron in the accommodating cavity through the discharging hole of the device to form a protective layer, so that the molten iron is prevented from being oxidized by contacting with air, solid iron oxide or accretion is avoided, and the heat radiation loss of the molten iron can be reduced; the setting of anti-oxidation material dog is arranged in preventing smuggleing secretly carbon black in the molten iron, improves the molten iron cleanliness factor.

4. According to the tapping device for the smelting reduction furnace, the uniform section and the bell mouth section arranged on the connecting channel can ensure the stability of the pressure in the smelting reduction furnace, reduce the pressure in the tapping device and facilitate the more stable and smooth control and discharge of molten iron; the overflow structure is used for preventing the pressure in the melting reduction furnace from suddenly rising, and molten iron entering the tapping device from the furnace flows out to suddenly surge, so that molten iron is splashed, and safety accidents occur.

5. The application provides a tapping device for smelting reduction furnace, the setting of inspection manhole and spray gun jack, when smelting reduction furnace need blowing out to overhaul, bore away refractory material through trompil equipment, after the incomplete iron has been put in the smelting reduction furnace, the inspection manhole is used for examining whether unobstructed of interface channel, if have remaining slag iron in the interface channel, the accessible inserts the oxygen spray gun in the spray gun jack, clears away remaining slag iron to guarantee that the interface channel is unblocked.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic side view of a tapping apparatus for a smelting reduction furnace according to an embodiment of the present application;

FIG. 2 is a schematic view of an angle of a tapping apparatus for a smelting reduction furnace according to an embodiment of the present application;

FIG. 3 is a schematic view of another angle of a tapping apparatus for a smelting reduction furnace according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an overflow arrangement according to an embodiment of the present application;

fig. 5 is an enlarged schematic view of a structure in fig. 1.

List of parts and reference numerals:

1. a shell body 11, an accommodating cavity 12, a molten iron outlet 13, an installation part 14, an inspection manhole 15, a spray gun jack 16, a thermocouple 17 and a residual iron notch,

2. a connecting channel, 21, a uniform section, 22, a bell mouth section, 221, a large mouth end, 222, a small mouth end, 223, a top surface, 224, a bottom surface, alpha, a first included angle,

31. a dust hood 311, a horizontal section side wall 32, a smoke passage 321, a smoke inlet 322, a smoke outlet,

4. a mounting seat, 5, a bolt and a nut,

6. an anti-oxidation material adding device 61, a storage bin 62, a control valve 63, a material conveying pipe 64 and a material outlet,

7. an anti-oxidation material block 71, a supporting part,

8. a liquid level meter 9, an overflow structure 91, an overflow cofferdam 92 and an overflow pipe,

101. pin hole 102, pin shaft.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to the accompanying drawings, referring to fig. 1-3, the present embodiment provides a tapping device for a smelting reduction furnace, the tapping device includes a housing 1, a containing cavity 11 is provided in the housing 1, a connecting channel 2 is provided at a lower portion of a side wall of the housing 1, the connecting channel 2 is used for communicating the smelting reduction furnace with the containing cavity 11, and a molten iron discharge port is provided at an upper portion of the side wall of the housing 1. The accommodating cavity 11 in the shell 1 forms a siphon structure with the smelting reduction furnace through the connecting channel 2, and the molten iron outlet 12 of the shell 1 is higher than the connecting channel 2, so that the molten iron in the smelting reduction furnace flows into the accommodating cavity 11 of the shell 1 through the connecting channel 2, and when the molten iron in the accommodating cavity 11 reaches the height of the molten iron outlet 12, the molten iron can be discharged out of the shell 1. Wherein the chamber 11 that holds of casing 1 is cylindric design, compares in other shape structures for the molten iron forms the circulation in its inside, has avoided the direct scour of molten iron, and the impact resistance is stronger, has prolonged its life greatly, and in addition, cylindric structural design generally only receives the effect of forces such as hoop stress, radial pulling force, pressure, need not set up other special stable structure, if set up the stiffening rib around casing 1, therefore cylindric structural design can save material, reduces manufacturing cost.

In one embodiment, the molten iron discharge port 12 and the connecting passage 2 are provided at both sides of the central axis of the cylindrical receiving chamber 11 to facilitate smooth discharge of the molten iron. The top of the housing 1 is provided with a dust removing structure, the dust removing structure is provided with a smoke passage 32 surrounded by a dust removing cover 31, the dust removing cover 31 is provided with a smoke inlet 321 and a smoke outlet 322, and the smoke inlet 321 is used for communicating the accommodating cavity 11 and the smoke passage 32. The top of casing 1 is equipped with the installation department 13 that extends to the periphery, and dust removal structure 3 includes mount pad 4 and establishes the dust excluding hood 31 at mount pad 4 top, and mount pad 4 fixed connection installation department 13, as an embodiment, a plurality of mounting holes have been seted up to the periphery of installation department 13 is even, and a plurality of mounting holes have also been seted up to corresponding position on mount pad 4, and bolt and nut 5 passes corresponding mounting hole and links to each other installation department 13 and mount pad 4 are fixed, this fixed connection mode safe and reliable.

Smoke and dust entry 321 department is equipped with first hinge structure, and the top of mount pad 4 is equipped with the second hinge structure with first hinge structure matched with for dust excluding hood 31 can cover and close on holding chamber 11, and as an implementation mode, pinhole has all been seted up to first hinge portion and second hinge portion, and pinhole 101 is connected through a round pin axle 102. The first hinge portion and the second hinge portion are not limited to the pin 102 and the pin hole 101, and may be of other hinge structures as long as the dust hood 31 can be covered on the accommodating cavity 11. When the smelting reduction furnace is started, molten iron needs to be poured into the device, so that molten iron stock is quickly built in the smelting reduction furnace, the required conditions of smelting reduction reaction are met, slagging is facilitated, slag splashing is conducted on a water-cooled wall by using a spring effect formed by blowing in a short time, the heat load is reduced, the blowing amount is further increased as soon as possible, iron is discharged as early as possible, a connecting channel between a housing accommodating cavity and a furnace body is prevented from being frozen, and therefore the dust hood rotates and rises through the hinged portion, and the molten iron is conveniently poured into the smelting reduction furnace through the device.

As shown in fig. 2 and 3, the dust hood 31 extends and is obliquely arranged above the molten iron outlet 12, the anti-oxidation material adding device 6 is installed on the side wall of the dust hood 31 above the smoke inlet 321, the discharge hole 64 of the anti-oxidation material adding device 6 extends to the upper side of the accommodating cavity 11, the anti-oxidation material adding device 6 comprises a storage bin 61, a control valve 62 and a conveying pipe 63, the end part of the conveying pipe 63 is the discharge hole 64, the anti-oxidation material can be carbon black, the carbon black is sprayed to the surface of the molten iron through the anti-oxidation material adding device to form a carbon black layer, the carbon black layer can prevent the molten iron from being in contact oxidation with air, the formation of solid iron oxide or accretion to block the molten iron outlet 12 is avoided, and the heat radiation loss of the molten iron can be reduced.

In one embodiment, the molten iron outlet 12 extends upwards to the top of the mounting part 13, the inner side of the molten iron outlet 12 is provided with an anti-oxidation material stopper 7, two ends of the anti-oxidation material stopper 7 are abutted with the inner side wall of the mounting part 13, and the bottom of the anti-oxidation material stopper 7 is not higher than the bottom of the molten iron outlet 12. The anti-oxidation material stop block 7 is used for preventing carbon black from being carried in molten iron, and the cleanliness of the molten iron is improved.

As shown in fig. 5, the connecting channel 2 includes an even section 21 and a flare section 22, the flare section 22 includes a large opening end and a small opening end, the large opening end is disposed near the accommodating cavity 11, the small opening end is connected with the even section 21, the flare section 22 includes a bottom surface 224 and a top surface 223, the top surface of the flare section 22 is an arc-shaped curved surface structure, the bottom surface 224 of the flare section 22 is a plane structure, the end portion of the bottom surface 224 of the flare section 22 near the accommodating cavity 11 is higher than the end portion near the even section 21, the bottom surface 224 forms a first included angle α with the horizontal plane, the first included angle α is 1 ° to 15 °, and further, the first included angle α is 3 ° to 10 °. The arrangement of the bell mouth section 22 and the uniform section 21 can not only ensure the stability of the pressure in the smelting reduction furnace, but also reduce the pressure in the device, thereby being convenient for more stable and smooth control and discharge of the molten iron.

In an embodiment, the overflow structure 9 further comprises an overflow structure 9, as shown in fig. 4, the overflow structure 9 includes an overflow cofferdam 91 and an overflow pipe 92, the overflow cofferdam 91 is disposed on the top of the casing 1, an installation part 13 is disposed on the periphery of the top of the overflow cofferdam 91, the overflow pipe 92 is disposed on the side wall of the casing 1, the overflow cofferdam 91 is disposed above the plane where the bottom of the molten iron discharge port is located, one side of the overflow cofferdam 91 is provided with an overflow molten iron outlet, and the top of the overflow pipe 92 is communicated with the inside of the overflow cofferdam 91. The arrangement of the overflow structure can meet the condition that the pressure in the smelting reduction furnace is suddenly increased, and molten iron entering the tapping device is splashed due to the sudden pressure increase, so that accidents can be reduced.

Preferably, the overflow structure 9 is an surge overflow device, the surge overflow device is composed of a surge overflow cofferdam and a surge overflow pipe, the surge overflow cofferdam is arranged above the liquid level of the tapping iron, and one side of the surge overflow cofferdam is provided with an overflow molten iron outlet for the overflow molten iron to flow out quickly during surge; the surge overflow pipe is positioned outside the tapping device, the upper end of the surge overflow pipe is connected with the overflow tapping hole, and the lower end of the surge overflow pipe is connected with the emergency slag iron pit and is used for rapidly conveying the surge overflow molten iron to the slag iron pit.

In a preferred embodiment, as shown in fig. 4, the molten iron discharging port 12 is integrally formed with the overflow molten iron outlet, and the top of the anti-oxidizing material stopper 7 is lower than the top of the overflow molten iron outlet, so that the overflowing molten iron is discharged into the molten iron runner together with the molten iron from the molten iron discharging port 12.

Specifically, anti-oxidation material dog 7 is a cuboid structure, and its both ends are equipped with supporting part 71, and the bottom sprag of supporting part 71 is at the top of casing 1, and the tip and the overflow cofferdam 91 inside wall looks butt of supporting part 71, so set up, can dismantle anti-oxidation material dog 7 in a flexible way, after being convenient for a long time by the molten iron erosion, convenient the change.

In an embodiment, a horizontal section side wall 311 is arranged on the side wall of the dust hood 31 above the smoke inlet 321, and a liquid level meter 8 is vertically arranged on the horizontal section side wall 311, so that the liquid level meter 8 is kept perpendicular to the molten iron liquid level for detecting the molten iron liquid level inside the tapping device in real time. This level gauge 8 adopts the radar level gauge, and the radar level gauge other end links to each other with level gauge control system, and level gauge control system is connected with smelting reduction furnace main control system, and smelting reduction furnace main control personnel can receive molten iron liquid level information in real time. When the smelting reduction furnace is opened, the molten iron liquid seal condition in the smelting reduction furnace can be accurately mastered by mastering the molten iron liquid level information in real time, the risk of opening the furnace is reduced, and the working efficiency is improved.

Referring to fig. 1, a manhole 14 is provided on a side wall of the casing 1, the manhole 14 is provided with a spray gun insertion hole 15, and the spray gun insertion hole 15 is disposed opposite to the connection passage 2. The maintenance manhole 15 is in encapsulated situation when normal production, when the smelting reduction furnace needs blowing out to overhaul, drills open the refractory material in the residual iron mouth 17 through the trompil equipment, has put the back with the residual iron in the smelting reduction furnace, and the maintenance manhole is used for checking whether unobstructed the interface channel, if have residual slag iron in the interface channel, the accessible inserts the oxygen lance in the spray gun jack, clears away residual slag iron to guarantee that the interface channel is unblocked.

In order to facilitate the detection of the temperature in the tapping device and effectively and stably control the outflow of molten iron, the tapping device is further provided with a thermocouple 16, and as an implementation mode, the thermocouple is arranged on the side wall of the top of the smoke inlet of the dust hood.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. The tapping device for the smelting reduction furnace is characterized by comprising a shell, wherein a connecting channel is formed in the side wall of the shell and is used for communicating a furnace body of the smelting reduction furnace with an accommodating cavity in the shell;

the accommodating cavity is of a vertically arranged cylindrical structure;

the side wall of the shell is provided with a molten iron outlet, and the molten iron outlet is higher than the connecting channel.

2. The tapping unit for a smelting reduction furnace according to claim 1, wherein the molten iron discharge port and the connecting passage are provided on both sides of a central axis of the cylindrical receiving chamber.

3. The tapping device for the smelting reduction furnace according to claim 1, wherein a dust removing structure is arranged at the top of the casing, the dust removing structure is provided with a smoke passage surrounded by a dust removing cover, the dust removing cover is provided with a smoke inlet and a smoke outlet, and the smoke inlet is used for communicating the accommodating cavity and the smoke passage.

4. The tapping device for the smelting reduction furnace according to claim 3, wherein the top of the housing is provided with an installation part extending towards the periphery, the dust removal structure comprises an installation seat and a dust removal cover arranged at the top of the installation seat, the installation seat is fixedly connected with the installation part, a first hinge structure is arranged at the smoke inlet, and a second hinge structure matched with the first hinge structure is arranged at the top of the installation seat, so that the dust removal cover can cover the accommodating cavity.

5. The tapping device for the smelting reduction furnace according to claim 4, wherein the dust hood extends and is obliquely arranged above the molten iron outlet, an anti-oxidation material adding device is installed on the side wall of the dust hood above the smoke inlet, and a discharge hole of the anti-oxidation material adding device extends to the upper part of the accommodating cavity.

6. The tapping device for a smelting reduction furnace according to claim 5, wherein the molten iron outlet extends upward to the top of the mounting portion, an anti-oxidation material stopper is provided inside the molten iron outlet, both ends of the anti-oxidation material stopper abut against the inner side wall of the mounting portion, the bottom of the anti-oxidation material stopper is not higher than the bottom of the molten iron outlet, and the top of the anti-oxidation material stopper is not lower than the top of the molten iron outlet.

7. The tapping unit for a smelting reduction furnace as claimed in claim 1, wherein the connecting passage includes a uniform section and a bell mouth section, the bell mouth section includes a large mouth end and a small mouth end, the large mouth end is disposed near the receiving cavity, the small mouth end is connected to the uniform section, the bell mouth section includes a bottom surface and a top surface, the top surface has an arc-shaped curved surface structure, the bottom surface has a plane structure, and an end portion of the bottom surface near the receiving cavity is higher than an end portion near the uniform section.

8. The tapping device for the smelting reduction furnace according to claim 6, further comprising an overflow structure, wherein the overflow structure comprises an overflow cofferdam and an overflow pipe, the overflow cofferdam is arranged at the top of the shell, the installation part is arranged at the periphery of the top of the overflow cofferdam, the overflow pipe is arranged on the side wall of the shell, the overflow cofferdam is arranged higher than the plane where the bottom of the molten iron outlet is arranged, one side of the overflow cofferdam is provided with an overflow molten iron outlet, and the top of the overflow pipe is communicated with the inner side of the overflow cofferdam;

preferably, the overflow molten iron outlet is positioned at the top of the molten iron discharge port and is communicated with the molten iron discharge port.

9. The tapping device for a smelting reduction furnace according to claim 1, wherein the side wall of the shell is further provided with an inspection manhole, the inspection manhole is provided with a lance insertion hole, and the lance insertion hole faces the connecting passage.

10. The tapping device for the smelting reduction furnace according to claim 3, further comprising a level gauge, wherein a horizontal section side wall is arranged on the side wall of the dust hood above the smoke inlet, and the level gauge is vertically arranged on the horizontal section side wall.

Images