Top of the upcomer in the flash smelting furnace for copper smelting

Abstract

The present invention provides a top of the rising flue in copper smelting in a flash furnace, which is characterized in that: plate-shaped copper water jackets are arranged in the area of the middle square water jacket close to the boiler side, the plate surface of the plate-shaped copper water jacket is placed horizontally, the plate-shaped copper water jacket is formed by arranging the edges of copper water jacket unit plates adjacent to each other, a cooling water channel is arranged inside the copper water jacket unit plate body, a refractory layer is arranged on the lower plate surface of the copper water jacket unit, the inlet and outlet water pipes of the cooling water channel extend to the upper plate surface of the copper water jacket unit, and lifting lugs are also arranged on the upper plate surface of the copper water jacket unit. In the above technical solution, a cooling water channel is arranged inside the copper water jacket unit plate body with a horizontally placed plate body, which has excellent cooling effect. The refractory layer attached to the lower plate surface of the copper water jacket unit can also be cooled in a timely, effective and uniform manner, its thermal deformation resistance ability is significantly enhanced, the structural strength of the flue top of the smelting furnace is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the top structure of the rising flue of the furnace body in the copper smelting process by flash furnace. Background Art

[0002] In the copper smelting process by flash furnace, the top of the rising flue of the furnace body is the area where high-temperature flue gas rises and concentrates on impact. Considering the large heat load continuously endured, the main part of the flue top is covered by hanging magnesia-chrome bricks for hanging and sealing. In order to reduce the heat load and slow down the excessive wear of the hanging bricks, a water jacket is installed every few groups of refractory bricks to absorb heat and protect the refractory bricks by means of cooling. The water jackets are arranged at intervals from the flash furnace body towards the boiler direction. As Figure 1 shown, three plate-shaped water jacket units 1 are arranged in sequence in the same column to form a group, and 5 groups are arranged at uniform intervals in the left and right directions. The plate surfaces are located in the vertical plane and are fixed by hanging. Figure 1 In the top view shown, the area of each plate-shaped water jacket unit 1 in each group is a strip-shaped area. A square water jacket 3 forming the flue opening 2 is arranged to the right of the middle between the three water jackets on the left and the two water jackets on the right. The areas between the water jacket groups are tightly filled and arranged with hanging refractory bricks.

[0003] Since the temperature of the flue gas hitting the top can reach more than 1400 °C and continuously endures a high heat load, although the above-mentioned cooling water jacket structure is adopted at the flue top, the distance between each group of water jackets is relatively large, and the cooling intensity of the hanging bricks between the water jackets is insufficient. And from the later production observation, in the area where the two groups of plate-shaped water jackets on the far right (near the boiler side) of the flue top are located, the heat load impact is greater. Figure 1 In the figure, the arrow on the right side in the middle indicates the flowing direction of the flue gas. The degree of loss of the water jackets and bricks in this area is more serious than that in other parts, indicating that the initially designed cooling method for this area is more insufficient. And due to the inconsistent expansion extrusion pressure between the bricks with different degrees of loss, the bricks on the flue top are arched, and finally the overall stability of the rising flue top is poor, and the hanging bricks collapse and fall off. Summary of the Invention

[0004] The purpose of the present invention is to provide a top of the rising flue for copper smelting by flash furnace, to provide corresponding cooling solutions for different heat load areas, improve the structural strength of the flue top of the smelting furnace, and extend the service life.

[0005] To achieve the above object, the present invention adopts the following technical solution: A top of the rising flue in copper smelting by flash furnace, characterized in that: a plate-shaped copper water jacket is arranged in the area of the middle square water jacket close to the boiler side, the plate surface of the plate-shaped copper water jacket is placed horizontally, the plate-shaped copper water jacket is formed by arranging copper water jacket unit plates adjacent to each other, a cooling water passage is arranged inside the copper water jacket unit plate body, a refractory layer is arranged on the lower plate surface of the copper water jacket unit, the inlet and outlet water pipes of the cooling water passage extend to the upper plate surface of the copper water jacket unit, and lifting lugs are also arranged on the upper plate surface of the copper water jacket unit.

[0006] In the above technical solution, a cooling water passage is arranged inside the copper water jacket unit plate body with a horizontal plate surface, which has excellent cooling effect. The refractory layer attached to the lower plate surface of the copper water jacket unit can also be cooled in a timely, effective and uniform manner, its thermal deformation resistance ability is significantly enhanced, the structural strength of the flue top of the smelting furnace is improved, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a top view of the water jacket arrangement of the top of the rising flue in copper smelting in the prior art;

[0008] Figure 2 、 3 、4 are the front view, top view and three-dimensional view of the water jacket arrangement of the flue top in the present invention;

[0009] Figure 5 is the front view of the copper water jacket unit; Figure 6 、 7 are respectively Figure 5 the top view and left view;

[0010] Figure 8 、 9 are respectively the schematic diagrams after the refractory layer is attached to the bottom of the copper water jacket unit;

[0011] Figure 10 is the top view of the cooling gate hole sleeve;

[0012] Figure 11 is Figure 10 the C-C cross-sectional view in

[0013] Figure 12 is the three-dimensional view of the cooling gate hole sleeve. DETAILED DESCRIPTION OF THE INVENTION

[0014] Combined with Figure 2 、 3, 4. The basic task of the present invention is to ensure the cooling of the top area with severe heat load. The specific solution is a flash smelting furnace copper smelting rising flue top. In the area of the middle square water jacket 10 close to the boiler side, plate-shaped copper water jackets are arranged. The plate surface of the plate-shaped copper water jacket is placed horizontally. The plate-shaped copper water jacket is composed of copper water jacket units 20 arranged with adjacent plate edges. A cooling water channel 21 is arranged inside the plate body of the copper water jacket unit 20. A refractory layer 22 is arranged on the lower plate surface of the copper water jacket unit 20. The inlet and outlet water pipes of the cooling water channel 21 extend to the upper plate surface of the copper water jacket unit 20. A lifting lug 23 is also arranged on the upper plate surface of the copper water jacket unit 20.

[0015] The above solution completely solves the cooling problem of the flue top area close to the boiler side. The reasonably arranged cooling water channels effectively absorb and exchange more heat, reducing the thermal load damage of the high-temperature flue gas to the flue top water jacket and magnesia-chrome bricks, extending the service life of the smelting furnace flue top. The lifting lug 23 adopts a top-embedded structure and will not directly contact the high temperature in the furnace to damage the hanging parts. The middle square water jacket 10 is the root water jacket of the accident flue, mainly used for connecting with the maintenance transition flue pipe during maintenance. The lifting lug 23 is used to connect hanging parts such as suspension rods.

[0016] As a preferred solution, a gate plate hole sleeve 30 is arranged at the position of the plate-shaped copper water jacket on the boiler side. The long holes of the two gate plate hole sleeves 30 are arranged in the same radial direction and are aligned. Cooling water pipes 31 are arranged inside the sleeve walls of the two gate plate hole sleeves 30 and are connected to the cooling water source pipeline.

[0017] The position where the gate plate hole sleeve 30 is arranged is directly adjacent to the arrangement area of the above-mentioned plate-shaped copper water jacket, and the temperature here is almost the same. Since a passage for the gate plate to move up and down is required, a sleeve structure is adopted to form a narrow-slit passage for the gate plate to move up and down. Therefore, the particularity of the structure here necessarily requires the structure to have corresponding thermal deformation resistance. Arranging the cooling water pipes 31 along the sleeve wall of the gate plate hole sleeve 30 can ensure the heat exchange capacity of the gate plate hole sleeve 30 to reduce the phenomenon of thermal deformation and ensure its service life.

[0018] The peripheral contour of the copper water jacket unit 20 is square. The cooling water channel 21 is arranged in two inner and outer paths. The outer water path 211 is C-shaped, and the inner water path 212 is U-shaped. The end water pipe joints of the outer water path 211 and the inner water path 212 are located in directions away from each other and are led out from the upper plate surface of the copper water jacket unit 20. Adopting the above-mentioned inner and outer double-path cooling water channel arrangement can ensure that the copper water jacket unit 20 is cooled evenly as a whole. The square shape shown in the figure has a small difference between the length and width and is close to a square, which is mainly determined according to the overall size and shape of the area to be covered.

[0019] In order to facilitate the arrangement of the cooling water pipes, the cooling water pipes 31 are arranged circumferentially along the sleeve wall of the gate plate hole sleeve 30 and are led out from the upper part on the side where the plate-shaped copper water jacket is located.

[0020] To ensure the firm and stable attachment of the refractory layer 22, the lower plate surface of the copper water jacket unit 20 is provided with protruding strips 24 arranged in parallel at intervals. The grooves between the protruding strips 24 are dovetail grooves with a narrow notch and a wide bottom. The upper part of the refractory layer 22 is embedded in the cavity of the groove. To reduce the stress concentration in the local area, the bottom of the groove between the protruding strips 24 and the groove wall, as well as between the groove wall and the groove edge, are in arc transition.

[0021] The above solution can be regarded as the lower plate surface of the copper water jacket unit 20 being a toothed surface. The toothed groove area ensures the reliability of the embedding of the refractory layer 22, and at the same time increases the heat exchange area, which is beneficial to timely cooling and heat exchange.

[0022] To avoid the delamination and detachment between the lower plate surface of the copper water jacket unit 20 and the refractory layer 22, as Figure 5 、 7 shown, claw nails 25 are arranged on the lower plate surface of the copper water jacket unit 20, and the claw nails 25 are inserted into the refractory layer 22. The claw part at the end of the claw nail 25 is exposed. A more preferred solution is that claw nails 25 extending downward are arranged on the lower end surface of the protruding strip 24, and the claw nails 25 are buried in the lower layer of the refractory layer 22. This further ensures the reliability of the connection between the lower plate surface of the copper water jacket unit 20 and the refractory layer 22.

[0023] A plate-shaped copper water jacket 40 is arranged in the area of the middle square water jacket 10 far from the boiler side. The plate surface of the plate-shaped copper water jacket 40 is vertically placed flat. The distance between two adjacent groups of plate-shaped copper water jackets 40 close to the middle square water jacket 10 is less than or equal to the distance between two adjacent groups of plate-shaped copper water jackets 40 far from the middle square water jacket 10. Combining Figure 2 、 3 、4, the distances between the four groups of plate-shaped copper water jackets 40 on the left side of the middle square water jacket 10 are basically equal. It can also be arranged in the following way, that is, the distance between the first and second groups of plate-shaped copper water jackets 40 from right to left is slightly larger than the distance between the second and third groups of plate-shaped copper water jackets 40 from right to left, and the distance between the two leftmost groups of plate-shaped copper water jackets 40 is the largest. In other words, the distances between the groups of plate-shaped copper water jackets from right to left gradually increase.

[0024] Comparing Figure 1 、 3 , the above solution can ensure the heat load effect in the high-temperature and high-flow-rate area. In view of the fact that although the leftmost area is high-temperature, there is no scouring by high-speed flue gas, so the required forced cooling intensity can be less than that of other areas with serious heat load and accompanied by flue gas scouring. Specifically, the plate-shaped copper water jackets 40 used in the area on the left side of the middle square water jacket 10 can adopt the water jacket structure in the existing technology, which can already meet the use requirements.

[0025] By adopting the technical solution provided by the present invention, the return water temperature of the on-site water jacket is normal, the slag hanging on the furnace inner wall is uniform, and the cooling water volume is about 200-300 m 3 / h. After the transformation, there is no situation of excessive loss and large-area arching in the flue area at present. After the transformation, through reasonable configuration and overall arrangement, the overhaul and production shutdown time are shortened, and the continuous stability of the existing production capacity is ensured.

Claims

1. The top of the upcomer in a flash smelting furnace for copper smelting, characterized in that: In the area of the middle square water jacket (10) close to the boiler side, plate-shaped copper water jackets are arranged. The plate surface of the plate-shaped copper water jackets is placed horizontally. The plate-shaped copper water jackets are formed by arranging the copper water jacket units (20) with their plate edges adjacent to each other. A cooling water passage (21) is arranged inside the plate body of the copper water jacket unit (20). A refractory layer (22) is arranged on the lower plate surface of the copper water jacket unit (20). The inlet and outlet water pipes of the cooling water passage (21) extend to the upper plate surface of the copper water jacket unit (20). A lifting lug (23) is also arranged on the upper plate surface of the copper water jacket unit (20); in the area of the middle square water jacket (10) far from the boiler side, plate-shaped copper water jackets (40) are arranged. The plate surface of the plate-shaped copper water jackets (40) is vertically placed horizontally. The distance between two adjacent groups of plate-shaped copper water jackets (40) close to the middle square water jacket (10) is less than or equal to the distance between two adjacent groups of plate-shaped copper water jackets (40) far from the middle square water jacket (10).

2. The flash furnace copper smelting upcomer top according to claim 1, characterized in that: A gate plate hole sleeve (30) is arranged at the position of the plate-shaped copper water jacket on the boiler side. The long holes of the two gate plate hole sleeves (30) are arranged radially in the same direction and aligned. A cooling water pipe (31) is arranged inside the sleeve wall of the two gate plate hole sleeves (30) and is connected to the cooling water source pipeline.

3. The flash furnace copper smelting upcomer top according to claim 1, wherein: The peripheral contour of the copper water jacket unit (20) is square. The cooling water passage (21) is arranged in two ways, internal and external. Among them, the external water passage (211) is C-shaped, and the internal water passage (212) is U-shaped. The end water pipe joints of the external water passage (211) and the internal water passage (212) are in directions far from each other and are led out from the upper plate surface of the copper water jacket unit (20).

4. The flash smelting copper upcomer top according to claim 2, characterized in that: The cooling water pipe (31) is arranged circumferentially along the sleeve wall of the gate plate hole sleeve (30) and is led out from the upper part on the side where the plate-shaped copper water jacket is located.

5. The flash smelting furnace copper smelting upcomer top according to claim 1 or 3, characterized in that: The lower plate surface of the copper water jacket unit (20) is provided with convex strips (24) arranged at intervals and in parallel. The groove between the convex strips (24) is a dovetail groove with a narrow notch and a wide bottom. The upper part of the refractory layer (22) is embedded in the cavity of the groove.

6. The flash smelting copper upcomer top according to claim 1 or 3, characterized in that: Claw nails (25) are arranged on the lower plate surface of the copper water jacket unit (20), and the claw nails (25) are placed into the refractory layer (22).

7. The flash smelting copper upcomer top as described in claim 5, characterized in that: Claw nails (25) extending downward are arranged on the lower end surface of the convex strip (24), and the claw nails (25) are buried in the lower layer of the refractory layer (22).

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