A top structure of a top-blowing converting furnace

Abstract

The present invention discloses a top-blown converting furnace roof structure, comprising a steel frame and a furnace roof suspended from the lower portion of the steel frame by a hanger rod. The furnace roof comprises a copper water jacket assembly assembled from several pieces and is provided with a flue gas outlet, a butt electrode inlet, a spray gun insertion port, a furnace drying port, a flux inlet, and a cold material inlet. The bottom surface of the furnace roof is inlaid with and adhered to a refractory material. Advantages of the present invention include: adaptability to the high-temperature environment of a top-blown converting furnace; structural stability; a service life exceeding five years; resistance to melt splashing and flue gas erosion; fabrication and assembly into any desired shape; ease of placement and assembly of functional openings; no expansion, extrusion, deformation, or instability; and no adhesion or clogging of the functional openings.

Description

Technical field:

[0001] The present invention relates to the field of copper metallurgical equipment, and in particular to a furnace top structure of a top-blown converting furnace. Background technology:

[0002] A top-blown converting furnace is a fixed kiln with a fixed hearth and a circular, elliptical, or oblong cross-section. It features a matte inlet, copper discharge port, observation port, flux inlet, lance insertion port, butt electrode inlet, flue gas outlet, and furnace drying port. It is used to convert matte into blister copper. Its typical structure includes masonry, hearth, hearth, roof, process air lances, and flue. The masonry, constructed of refractory bricks and a copper jacket, includes the furnace bottom and walls, serving as the kiln's load-bearing and insulation structure. The roof encloses the furnace interior. The interior space enclosed by the masonry and roof is divided into the hearth and hearth. The lower portion, the hearth, holds the high-temperature melt, while the upper portion, the hearth, serves as the flue gas flow space.

[0003] The internal temperature of the top-blown converting furnace is as high as 1200-1300℃, which places high demands on the temperature resistance and service life of various parts of the furnace body; the reaction process in the furnace is intense, the melt fluctuates and splashes severely, the upper space of the melt is only about 2m, and the inner surface of the furnace is covered by the splashing melt. Various parts of the furnace body are constantly subjected to the scouring and erosion of the high-temperature melt, and there are serious sticking and furnace knots in various places in the furnace; the kiln is operated under negative pressure, the flue gas flow rate is fast, the flue gas temperature is high, and the flue gas scouring is relatively intense, so the kiln furnace surface (including the furnace wall and furnace roof) is required to have strong scouring resistance; various parts of the furnace body will expand and deform after being heated, and high structural thermal stability requirements are placed on each part.

[0004] As mentioned above, due to the structure of the top-blown converting furnace, the intense reaction intensity therein, the complex working conditions and the stringent requirements for the thermal stability of the structure, the conventional furnace roof structure of hanging bricks, brick arches and steel water jackets is not applicable. Therefore, it is necessary to invent a new type of top-blown converting furnace roof structure. Summary of the invention:

[0005] The object of the present invention is to provide a furnace roof structure that can meet the needs of a top-blown converting furnace to solve the following problems:

[0006] 1. Issues with service life and structural stability in high temperature environments;

[0007] 2. Service life issues under conditions of splash erosion, slag erosion, and flue gas scouring;

[0008] 3. The problem of accommodating functional openings such as the discharge port, process air vents, openings for adding cold materials such as residual anodes, furnace drying ports, and flue gas outlets within the limited furnace top area.

[0009] 4. Ensure the smooth flow of functional orifices under conditions of severe splashing and adhesion.

[0010] The present invention is implemented by the following technical solutions:

[0011] A top-blown converting furnace roof structure comprises a steel frame and a furnace roof cover suspended from the lower part of the steel frame by a hanger rod; the furnace roof cover comprises a copper water jacket assembly formed by splicing together several pieces, and is provided with a smoke outlet, a butt electrode inlet, a spray gun insertion port, a furnace drying port, a flux inlet, and a cold material inlet; the bottom surface of the furnace roof cover is inlaid with and adhered to refractory material.

[0012] Preferably, the copper water jacket assembly includes a steel frame and several brick-lined copper water jackets, the upper part of the steel frame is provided with bolt holes and lifting ears, the bottom of the hanger is connected to the lifting ears through a pin; the steel frame and the brick-lined copper water jacket are fixedly connected by bolts, the lower part of the brick-lined copper water jacket is inlaid with refractory bricks, and refractory castables are attached between adjacent refractory bricks.

[0013] Preferably, the flue gas outlet is arranged at the edge of the furnace top cover, and the flue gas outlet is a copper water jacket channel with a rectangular cross-section. A plurality of plate-type copper water jackets that are connected and fixed to each other are vertically arranged around the flue gas outlet; the bottom of the plate-type copper water jacket on one side close to the center of the furnace top cover passes through the furnace top cover and stops at the lower part of the furnace top cover, and the bottoms of the plate-type copper water jackets on the other three sides abut against the top of the brick-inlaid copper water jacket, and the outer wall of the plate-type copper water jacket is fixedly connected to the top of the brick-inlaid copper water jacket.

[0014] Preferably, the butt pole inlet is arranged at the edge of the furnace top cover, and the butt pole inlet is an inclined copper water jacket channel with a rectangular cross-section. A plurality of plate-type copper water jackets that are connected and fixed to each other are provided around the butt pole inlet. The bottom of the plate-type copper water jacket of the butt pole inlet abuts against the top of the brick-lined copper water jacket, and the outer wall of the plate-type copper water jacket of the butt pole inlet is fixedly connected to the top of the brick-lined copper water jacket. A plate-type copper water jacket is vertically provided on one side of the butt pole inlet close to the center of the furnace top cover, and the bottom of the plate-type copper water jacket passes through the furnace top cover and stops at the lower part of the furnace top cover.

[0015] Preferably, the cold material addition inlet is a vertically arranged copper water jacket channel with a rectangular cross-section, and a plurality of plate-type copper water jackets that are connected and fixed to each other are vertically arranged around the cold material addition inlet; the bottom of the plate-type copper water jacket of the cold material addition inlet abuts against the top of the brick-inlaid copper water jacket, the outer wall of the plate-type copper water jacket of the cold material addition inlet is fixedly connected to the top of the brick-inlaid copper water jacket, and a sealing cover is provided on the top of the cold material addition inlet.

[0016] Preferably, the spray gun insertion port, flux addition port and oven port are all circular openings provided on the brick-inlaid copper water jacket.

[0017] Preferably, there are multiple spray gun insertion ports, and the multiple spray gun insertion ports are arranged in a line in the middle of the furnace top cover.

[0018] Preferably, the boom is provided with a length adjustment mechanism.

[0019] Preferably, the steel frame includes a steel beam and a hanging mechanism provided on the steel beam, and the hanging mechanism is fixedly connected to the top of the suspension rod.

[0020] Advantages of the present invention:

[0021] 1. The furnace roof structure of the present invention is designed as a full copper water jacket furnace roof. The copper water jacket has high heat conduction efficiency, good cooling effect (the surface temperature of the water jacket does not exceed 200°C), and good processing performance. Therefore, it has the following beneficial effects:

[0022] ①Can adapt to the high temperature environment of top-blown refining furnace;

[0023] ② There will be no violent expansion and deformation, no thermal vibration, and the structure is stable;

[0024] ③The service life is more than 5 years;

[0025] ④ A protective layer of blowing slag is formed on the surface of the water jacket, which is not afraid of melt splashing erosion and flue gas erosion;

[0026] ⑤ The copper water jacket has good processing performance and can be made and assembled into any shape. The functional orifices are easy to set and assemble.

[0027] 2. The furnace top installation structure of the present invention is in a hanging form, and there is a gap between the furnace top and the furnace wall and the flue in the vertical direction to offset the expansion of the furnace wall and the flue after being heated, so that expansion, extrusion and deformation will not occur.

[0028] 3. The layout and structure of the functional openings of the present invention are reasonable, will not stick together and be blocked, and can stably realize their respective functions.

[0029] 4. The copper water jacket forming the bottom surface of the furnace top in the present invention is entirely tiled, so that the copper surface of the water jacket is not in direct contact with the flue gas and splashing melt, which has the following advantages:

[0030] ① The copper water jacket on the furnace top will not be stuck with too many knots due to excessive cooling intensity;

[0031] ② The surface of the water jacket will not be corroded or deteriorated after chemical reaction with the components in the flue gas and melt, thereby increasing its service life;

[0032] ③It can reduce the heat loss of the furnace body caused by the heat exchange of the copper water jacket. Description of the drawings:

[0033] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a schematic diagram of the relationship between the top and furnace body of the top-blown furnace in Example 1.

[0035] Figure 2 This is a schematic structural diagram of the top of the top-blown furnace in Example 1.

[0036] Figure 3 This is a top view of the circular furnace top cover of Example 1.

[0037] Figure 4 It is a structural diagram of the copper water jacket assembly.

[0038] Figure 5 for Figure 4 AA cross-section diagram.

[0039] Figure 6 Schematic diagram of the connection between the lifting lug and the boom.

[0040] Figure 7 for Figure 1 Enlarged view of point A.

[0041] Figure 8 This is a top view of the elliptical furnace top cover of Example 2.

[0042] Figure 9 This is a top view of the elliptical furnace top cover of Example 3.

[0043] Figure 10 for Figure 9 BB cross-section diagram.

[0044] In the figure: furnace body 1, furnace hearth 1.1, furnace chamber 1.2, furnace wall 1.3, furnace roof 2, steel frame 2.1, steel beam 2.1.1, upper lifting lug 2.1.2, furnace roof cover 2.2, steel frame 2.2.1, lower lifting lug 2.2.2, brick-lined copper water jacket 2.2.3, refractory bricks 2.2.4, refractory castable 2.2.5, large dovetail groove 2.2.6, small dovetail groove 2.2.7, suspension rod 2.3, adjustment sleeve 2.3.1, screw with lug 2.3.2, pin 2.3.3, flue gas outlet 2.4, butt electrode charging port 2.5, spray gun insertion port 2.6, furnace drying port 2.7, flux charging port 2.8, cold material charging port 2.9, plate-type copper water jacket 2.10, flue 3, butt electrode charging device 4, spray gun system 5. Specific implementation method:

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0047] Example 1:

[0048] This embodiment is described together with the converting furnace after the improved furnace top is installed on the converting furnace. The converting furnace is used for top-blowing converting of copper matte.

[0049] This embodiment provides a top-blown converting furnace, comprising a furnace body 1 and a furnace roof 2. The furnace body 1 comprises, from bottom to top, a furnace hearth 1.1 and a hearth 1.2. The furnace roof 2 comprises a steel frame 2.1 and a furnace roof cover 2.2. The furnace roof cover 2.2 comprises a spliced ​​copper water jacket assembly, which is suspended from the steel frame 2.1 via a suspension rod 2.3. The bottom surface of the furnace roof cover 2.2 is inlaid with and adhered to a refractory material.

[0050] like Figure 2 As shown, in this embodiment, the bottom surface of the steel beam 2.1.1 of the steel frame 2.1 is provided with an upper lifting lug 2.1.2 for connecting the suspension rod 2.3.

[0051] The copper water jacket assembly includes a steel frame 2.2.1 and several brick-lined copper water jackets 2.2.3. The steel frame 2.2.1 is provided with bolt holes and lower lifting lugs 2.2.2. The bottom of the lifting rod is connected to the lower lifting lugs 2.2.2 via a pin 2.3.3. The lower portion of the steel frame 2.2.1 is fixedly connected to the brick-lined copper water jacket 2.2.3 via bolts. The lower portion of the brick-lined copper water jacket 2.2.3 is inlaid with refractory bricks 2.2.4, and refractory castables 2.2.5 are attached between adjacent refractory bricks 2.2.4. This arrangement prevents the copper surface of the water jacket from direct contact with flue gas and splashing melt, preventing excessive adhesion of the copper water jacket on the furnace top 2 due to excessive cooling intensity. It also prevents the water jacket surface from corroding and deteriorating due to chemical reactions with components in the flue gas and melt, thereby increasing its service life. Furthermore, it can improve the thermal insulation performance of the furnace body 1.

[0052] There is a 60mm vertical gap between the furnace roof 2.2 and the top of the furnace wall 1.3 of the furnace chamber 1.2. This gap is used to absorb the expansion of the furnace body 1 after heating, and prevent the furnace wall 1.3 from squeezing the edge of the furnace roof 2.2 after the furnace body 1 expands due to heat, causing it to deform or become unstable. The gap is filled with compressible refractory castable 2.2.5 to prevent smoke from escaping.

[0053] like Figure 3 As shown, the contour of the furnace roof 2.2 is circular.

[0054] The furnace top cover 2.2 is provided with a fume outlet 2.4, a butt anode inlet 2.5, six spray gun insertion ports 2.6, two furnace drying ports 2.7 and a flux inlet 2.8.

[0055] The center line of the furnace top 2 is the direction of melt flow in the furnace, and the center line of the furnace top 2 is perpendicular to the line connecting the center points of the flue gas outlet 2.4 and the butt anode inlet 2.5.

[0056] The flue gas outlet 2.4 is located at the edge of the furnace roof 2.2. This flue gas outlet 2.4 is a rectangular copper water jacket channel. Multiple interconnected plate-type copper water jackets 2.10 are vertically arranged around the flue gas outlet 2.4. The bottom of the plate-type copper water jacket 2.10 on one side near the center of the furnace roof 2.2 extends 500mm into the furnace roof 2.2 to prevent molten metal from splashing into the flue gas outlet 2.4. The bottoms of the plate-type copper water jackets 2.10 on the other three sides abut against the top of the brick-inlaid copper water jacket 2.2.3. The outer walls of the plate-type copper water jackets 2.10 are fixedly connected to the top of the brick-inlaid copper water jacket 2.2.3. The length and width of the flue gas outlet 2.4 are determined by the flue gas volume and flow rate.

[0057] The butt inlet 2.5 is located on the edge of the furnace roof 2.2. It is an inclined copper water jacket channel with a rectangular cross-section. It is surrounded by multiple, interconnected, and fixedly arranged, inclined plate-type copper water jackets 2.10. The bottom of the plate-type copper water jackets 2.10 abut against the top of the brick-lined copper water jacket 2.2.3, and the outer wall of the plate-type copper water jackets 2.10 are fixedly connected to the brick-lined copper water jacket 2.2.3. A row of plate-type copper water jackets 2.10 are vertically installed on one side of the butt inlet 2.5 near the center of the furnace roof 2.2, extending 300 mm into the furnace roof 2.2. This prevents splashing melt from entering the butt inlet 2.5. The length and width of the butt inlet 2.5 are determined by the size of the spent anode plates. The inclination angle of the buttom inlet 2.5 is determined by the intersection of its extension line and the furnace bottom. The intersection must fall near the axis of the furnace bottom because the melt level is highest here, which can minimize the damage to the furnace bottom when the buttom anode plates slide into the furnace.

[0058] The smelting flue gas enters the flue 3 through the flue gas outlet 2.4, which is located at the lower part of the flue 3. Figure 7 As shown, a gap is provided between the upper surface of the plate-type copper water jacket 2.10, which encloses the flue gas outlet 2.4, and the lower surface of the flue 3. In this embodiment, the gap is 70 mm. This gap is used to absorb the expansion of the flue 3 after heating, preventing the flue 3 from squeezing the plate-type copper water jacket 2.10, causing deformation or structural instability. A compressible refractory castable 2.2.5 is filled in the gap to prevent smoke from escaping.

[0059] Each steel frame 2.2.1 is provided with at least four lower lifting ears 2.2.2 and a number of bolt holes. The lower lifting ears 2.2.2 are used to connect the hanger 2.3. The upper surface of each brick-inlaid copper water jacket 2.2.3 is provided with at least four threaded holes. Each plate-type copper water jacket 2.10 is also provided with threaded holes. The bolt holes are used to connect the brick-inlaid copper water jacket 2.2.3 / plate-type copper water jacket 2.2.10 to the steel frame 2.2.1 by bolts, or to connect different copper water jacket components by bolts.

[0060] The lance insertion port 2.6 is a frustum-shaped hole extending through the furnace roof 2.2, with a major diameter of 120 mm and a minor diameter of 91 mm. It is located in a brick-lined copper water jacket 2.2.3. Six lance insertion ports 2.6 are arranged in a line, 600 mm apart, and the distance between their connecting lines and the centerline of the furnace roof 2 is 100 mm. The lance tubes of the lance system 5 are inserted into the furnace through the lance insertion ports 2.6, injecting process air with an oxygen concentration of 21-28%. The lance tubes are positioned 200-500 mm above the slag surface.

[0061] The furnace opening 2.7 is a cylindrical hole with a diameter of 300mm that penetrates the furnace roof 2.2. It is located in a brick-lined copper water jacket 2.2.3. There are two furnace openings 2.7, symmetrically arranged about the centerline of the furnace roof 2. Their positioning is determined by maximizing the distance from the flue gas outlet 2.4 and the lance insertion port 2.6, while maintaining a minimum distance of 1000mm from the furnace wall 1.3. During furnace drying, the burner is inserted into the furnace opening 2.7 to perform the drying operation.

[0062] The flux inlet 2.8 is a cylindrical hole with a diameter of 300 mm that penetrates the furnace roof 2.2. It is located in a brick-lined copper water jacket 2.2.3. The positioning of the flux inlet 2.8 is based on minimizing the distance from the matte inlet and maximizing the distance from the flue 3, while maintaining a distance of less than 1000 mm from the furnace wall 1.3. Calcium flux is metered and introduced into the furnace through the flux inlet 2.8. Small pieces of cold material and powdered material can also be introduced through the flux inlet 2.8.

[0063] The brick-lined copper water jacket 2.2.3 located at the edge of the furnace top cover 2.2 is triangular or trapezoidal, and the other brick-lined copper water jackets 2.2.3 are rectangular.

[0064] The lower surface of the brick-lined copper water jacket 2.2.3 is processed with multiple large dovetail grooves 2.2.6 and small dovetail grooves 2.2.7. The large dovetail grooves 2.2.6 are inlaid with inverted trapezoidal refractory bricks 2.2.4, and refractory castables 2.2.5 are filled between the refractory bricks 2.2.4 to form a refractory castable layer with a certain thickness.

[0065] The suspension rod 2.3 comprises an adjustment sleeve 2.3.1, two lug screws 2.3.2, and a pin 2.3.3. The pin 2.3.3 connects and secures the lug screws 2.3.2 to the upper or lower lug 2.1.2. The external threads of the upper and lower lug screws 2.3.2 are respectively threaded and reversed. The internal threads at the upper and lower ends of the adjustment sleeve 2.3.1 are respectively threaded and reversed. Rotating the adjustment sleeve 2.3.1 adjusts the vertical position of the copper water jacket assembly or the furnace roof 2.2, facilitating assembly of the furnace roof 2.2. The length of the suspension rod 2.3 can also be adjusted to disengage the furnace roof 2.2 from the furnace wall 1.3 or flue 3 if the flue 3 or furnace wall 1.3 expands due to heat.

[0066] Example 2:

[0067] Based on Example 1, the difference from Example 1 is that:

[0068] The outline of the furnace body 1 is elliptical, and accordingly, Figure 8 As shown, the outline of the furnace top cover 2.2 is also elliptical, and the structure of the copper water jacket assembly has also been adjusted.

[0069] The flow direction of the melt in the furnace is the long axis of the furnace top cover 2.2.

[0070] Example 3:

[0071] Based on Example 1, the difference from Example 1 is that:

[0072] The outline of the furnace body 1 is elliptical, and accordingly, Figure 9 As shown, the contour of the furnace top cover 2.2 is also elliptical, and the number of the corresponding copper water jacket components is 28, and the structure of the copper water jacket components has also been adjusted.

[0073] The flow direction of the melt in the furnace is the long axis of the ellipse.

[0074] The center line of the flue gas outlet 2.4 and the line connecting the lance insertion port 2.6 coincide with the major axis of the ellipse. The flue gas outlet 2.4 is located close to the furnace wall 1.3, and the flue 3 is also located directly above the flue gas outlet 2.4.

[0075] The butt anode inlet 2.5 is located close to the furnace wall 1.3 and between the furnace wall 1.3 and the flue gas outlet 2.4, but its extension line still falls near the axis of the furnace bottom.

[0076] This embodiment has an additional cold material inlet 2.9, which is a vertically arranged copper water jacket channel with a rectangular cross section. A plurality of plate-type copper water jackets 2.2.10 are vertically arranged around the cold material inlet 2.9 and fixed to each other. The bottom of the plate-type copper water jacket 2.2.10 of the cold material inlet 2.9 abuts against the top of the brick-mounted copper water jacket 2.2.3, and the outer wall of the cold material inlet 2.9 is fixedly connected to the top of the brick-mounted copper water jacket 2.2.3.

[0077] Larger cold materials such as scrap copper, cladding, chute adhesives, etc. enter the furnace through the cold material inlet 2.9.

[0078] All vertical plate-type copper water jackets 2.10 of the cold material copper water jacket assembly do not penetrate the furnace top cover 2.2.

[0079] The principle for determining the position of the cold material feeding port 2.9 is to maximize the distance from the flue gas outlet 2.4 and the lance insertion port 2.6, but the distance from the furnace wall 1.3 should not be less than 1000 mm.

[0080] The length and width of the cold material feeding port 2.9 are determined according to the size of the cold material to be fed.

[0081] A sealing cover is provided on the top of the cold material adding port 2.9 for closing the cold material adding port 2.9 when no cold material is added.

[0082] There are 8 spray gun insertion ports 2.6, which are 600 mm apart and evenly distributed on the long axis of the furnace top cover 2.2. There are 3 on the left side of the short axis of the furnace top cover 2.2 and 5 on the right side of the short axis of the furnace top cover 2.2.

[0083] Example 4:

[0084] Based on Example 1, the difference from Example 1 is that:

[0085] The outline of the furnace body 1 is an oblong, and the outline of the corresponding furnace top cover 2.2 is also an oblong. The number and structure of the corresponding copper water jacket components are slightly adjusted.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A top-blown converting furnace roof structure, characterized in that: The furnace comprises a steel frame and a furnace top cover suspended from the lower part of the steel frame by a suspender rod; the furnace top cover comprises a copper water jacket assembly formed by splicing together a plurality of pieces; the furnace top cover is provided with a smoke outlet, a butt electrode inlet, a spray gun insertion port, a furnace drying port, a flux inlet, and a cold material inlet; the bottom surface of the furnace top cover is inlaid with and adhered to a refractory material; The copper water jacket assembly includes a steel frame and a plurality of flat brick-lined copper water jackets. The upper portion of the steel frame is provided with bolt holes and lifting lugs. The bottom of the lifting rod is connected to the lifting lugs via a pin. The steel frame is fixedly connected to the brick-lined copper water jacket via bolts. The lower portion of the brick-lined copper water jacket is inlaid with refractory bricks, and refractory castables are attached between adjacent refractory bricks. The suspension rod is provided with a length adjustment mechanism.

2. The top-blown converting furnace roof structure according to claim 1, characterized in that: The flue gas outlet is arranged at the edge of the furnace top cover. The flue gas outlet is a copper water jacket channel with a rectangular cross-section. A plurality of plate-type copper water jackets that are connected and fixed to each other are vertically arranged around the flue gas outlet. The bottom of the plate-type copper water jacket on one side close to the center of the furnace top cover passes through the furnace top cover and stops at the lower part of the furnace top cover. The bottoms of the plate-type copper water jackets on the other three sides abut against the top of the brick-lined copper water jacket, and the outer wall of the plate-type copper water jacket is fixedly connected to the top of the brick-lined copper water jacket.

3. The top structure of a top-blown converting furnace according to claim 1, characterized in that: The butt pole inlet is arranged at the edge of the furnace top cover. The butt pole inlet is an inclined copper water jacket channel with a rectangular cross-section. A plurality of plate-type copper water jackets that are connected and fixed to each other are arranged around the butt pole inlet. The bottom of the plate-type copper water jacket of the butt pole inlet abuts against the top of the brick-lined copper water jacket. The outer wall of the plate-type copper water jacket of the butt pole inlet is fixedly connected to the top of the brick-lined copper water jacket. A plate-type copper water jacket is vertically provided on one side of the butt pole inlet close to the center of the furnace top cover. The bottom of the plate-type copper water jacket passes through the furnace top cover and stops at the lower part of the furnace top cover.

4. The top structure of a top-blown converting furnace according to claim 1, characterized in that: The cold material inlet is a vertically arranged copper water jacket channel with a rectangular cross-section. A plurality of plate-type copper water jackets that are connected and fixed to each other are vertically arranged around the cold material inlet; the bottom of the plate-type copper water jacket of the cold material inlet abuts against the top of the brick-inlaid copper water jacket, the outer wall of the plate-type copper water jacket of the cold material inlet is fixedly connected to the top of the brick-inlaid copper water jacket, and a sealing cover is provided on the top of the cold material inlet.

5. The top structure of a top-blown converting furnace according to claim 1, characterized in that: The spray gun insertion port, flux adding port and oven opening are all circular openings arranged on the brick-inlaid copper water jacket.

6. The top structure of a top-blown converting furnace according to claim 1, characterized in that: There are multiple spray gun insertion ports, and the multiple spray gun insertion ports are arranged in a line in the middle of the furnace top cover.

7. The top structure of a top-blown converting furnace according to claim 1, characterized in that: The steel frame includes a steel beam and a hanging mechanism arranged on the steel beam, and the hanging mechanism is fixedly connected to the top of the suspension rod.

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