A side-blown furnace

Abstract

The application relates to the technical field of metal smelting equipment, and provides a side-blown furnace, which comprises a furnace base, a support, a furnace pot, a copper water jacket, a steel water jacket and a flue interface water jacket, the copper water jacket is arranged in three layers and comprises a first layer copper water jacket, a second layer copper water jacket and a third layer copper water jacket from bottom to top, the steel water jacket is arranged in one layer and is arranged on the third layer copper water jacket, a plurality of steel water jackets enclose a flue, the top of the plurality of steel water jackets is provided with a flue interface water jacket, the outer side of the upper part of each steel water jacket is connected with the support through a support base; four cross beams surrounding the steel water jacket are arranged on the support, and the support base is connected with the cross beam. The steel water jacket is fixed by connecting the support base on the steel water jacket with the cross beam on the support, the steel water jacket is fixed in a hanging mode instead of the scheme that the steel water jacket is supported and fixed by a water jacket ring beam in the prior art, so that the water leakage phenomenon in the prior art is effectively solved, and the safety hidden danger is eliminated; after the water jacket ring beam is cancelled, the maintenance cost can be reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of metal smelting equipment, and more specifically, relates to a side-blown furnace. Background Technology

[0002] In industrial production, processes such as non-ferrous metal smelting and metal surface treatment generate hazardous waste, which typically contains valuable metals such as lead, copper, nickel, vanadium, and titanium. If hazardous waste is not properly disposed of, it will not only pollute the natural environment but also pose a significant threat to human health. Furthermore, the failure to properly recover the valuable metals in hazardous waste leads to a waste of resources.

[0003] Currently, side-blown furnaces can be used for metal smelting. For example, patent application number 202120237323.8 discloses an oxygen-enriched molten pool side-blown furnace, which can be used for metal smelting. However, existing side-blown furnace structures still have the following drawbacks:

[0004] like Figure 1 and Figure 2 As shown, the existing side-blown furnace basically includes: furnace base (not shown in the figure), support b, hearth (not shown in the figure), copper water jacket d, steel water jacket e, flue interface water jacket f, and furnace top water jacket g. Among them, the copper water jacket is set in three layers, and the steel water jacket e is set on part of the third layer of copper water jacket. The two ends of the steel water jacket e are fixed to the support b by two layers of water jacket ring beams c set at intervals. The water jacket steel beam c is composed of four water jacket beams prefabricated in the factory and welded on site. Each water jacket beam is composed of multiple steel plates welded together, with many welds and complex structure.

[0005] The installation of the water jacket ring beam c is cumbersome. After welding and assembling it with the side-blown furnace support b on site, refractory material needs to be poured onto the inner side of each water jacket beam. Due to limited on-site construction conditions, the effect of the refractory material cannot meet expectations. At the same time, the water jacket ring beam c also needs to withstand the heavy pressure of the steel water jacket d, which makes the refractory material prone to falling off during use. This causes the inner side of the water jacket beam to be directly baked by high temperature, resulting in frequent water leakage. Moreover, the existing first charging port h on the third layer copper water jacket and the second charging port a on the furnace top water jacket g are set at different heights. The first charging port h is located on the charging port water jacket of the third layer copper water jacket, and the second charging port a is located on the furnace top water jacket g. The second charging port a is very close to the flue, and some of the dust material coming down from the second charging port a will be directly sucked away by the flue, increasing the dust rate and reducing the raw material utilization rate, thus increasing production costs. In addition, the second charging port a, which is at a higher position, also needs to be connected to the furnace top water jacket g and requires the addition of a maintenance platform, which is costly. Utility Model Content

[0006] In view of the shortcomings of the existing side-blown furnace structure, the purpose of this application is to provide a side-blown furnace that fixes the steel jacket by fixing a support on the outside of the steel jacket and then connecting the support to a crossbeam on the bracket, thereby replacing the fixing method of fixing the steel jacket by the water jacket ring beam in the prior art, thus effectively solving the problem of water leakage.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: a side-blown furnace is provided, comprising: a furnace base, a support, a furnace hearth, a copper water jacket, a steel water jacket, and a flue interface water jacket. The copper water jacket is arranged in three layers, namely, a first layer copper water jacket, a second layer copper water jacket, and a third layer copper water jacket from bottom to top. A single steel water jacket is arranged and disposed on the third layer copper water jacket. Multiple steel water jackets form a flue. A flue interface water jacket is provided on the top of the multiple steel water jackets. The upper outer side of each steel water jacket is connected to the support through a support. Four crossbeams surrounding the steel water jackets are provided on the support, and the support is connected to the crossbeams.

[0008] In one embodiment, the support includes a base plate, a rib plate, and a pad plate. The bottom edge of the rib plate is connected to the base plate, the side edge of the rib plate is connected to the pad plate, the pad plate is fixed to the outside of the steel jacket, and the base plate is connected to the crossbeam.

[0009] In one embodiment, the ribs are provided with at least two pieces.

[0010] In one embodiment, the pad is provided with a cover plate that abuts against the top edge of each of the ribs.

[0011] In one embodiment, the crossbeam is provided with a fixing screw, the base plate is provided with a through hole, and the fixing screw passes through the through hole and is screwed with a fastening nut.

[0012] In one embodiment, a washer is fitted onto the fixing screw between the fastening nut and the base plate.

[0013] In one embodiment, a fixing plate is provided on the crossbeam, and the fixing screw is fixedly connected to the fixing plate.

[0014] In one embodiment, the fixing plate is welded to the crossbeam, the bottom plate is welded to the rib plate, the rib plate is welded to the pad plate, and the pad plate is welded to the molten steel jacket.

[0015] In one embodiment, the third copper water jacket is provided with a feed port water jacket, and the feed port water jacket is provided with a first feed port and a second feed port.

[0016] In one embodiment, the bottom of the molten steel jacket is provided with two cleaning ports, which are respectively located at the corners of the molten steel jacket. A mounting flange is provided at each cleaning port, and a fixing flange is installed on the mounting flange by a ring of bolts. A sealing ring is provided between the mounting flange and the fixing flange. An installation pipe is provided on the fixing flange, and a valve is provided on the installation pipe.

[0017] The beneficial effects of the side-blown furnace provided in this application are as follows:

[0018] 1. The steel water jacket is fixed by connecting the support on the steel water jacket to the crossbeam on the bracket. The steel water jacket is fixed by suspension instead of the water jacket ring beam used in the existing technology. This effectively solves the problem of water leakage caused by the water jacket ring beam in the existing technology and eliminates safety hazards. After eliminating the water jacket ring beam, maintenance costs can also be reduced and production efficiency can be improved.

[0019] 2. By setting both the first and second feed inlets on the feed inlet water jacket of the third layer copper water jacket at the same height, away from the flue, and close to the molten pool and combustion lance inside the furnace, it is beneficial to the complete combustion of materials, reduce the dust rate, and facilitate maintenance.

[0020] 3. Two cleaning ports are installed on the molten steel jacket, with valves at each port. Under normal circumstances, the valves are closed, preventing water from entering or exiting the cleaning ports. When it is necessary to remove debris from the molten steel jacket, one valve is connected to an external water supply pipe, and the other is connected to an external water return pipe, forming an inlet-outlet system to flush and clean the bottom of the molten steel jacket. Moreover, the inlet and outlet of the two valves can be alternated, effectively flushing the inner bottom corners of the molten steel jacket, preventing debris accumulation, and providing good protection for the molten steel jacket. At the same time, the cleaning of debris can be carried out online without shutting down the side-blown furnace, ensuring both safety and production efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a side-blown furnace in the prior art;

[0023] Figure 2 This is a schematic diagram of a structure for installing a water jacket beam on a support in the prior art;

[0024] Figure 3This is a schematic diagram of the structure of a side-blown furnace provided in an embodiment of this application;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the bracket with a crossbeam, a fixing plate and a fixing screw in the embodiment of this application;

[0027] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0028] Figure 7 This is a schematic diagram of the main view of the steel water jacket in the embodiments of this application;

[0029] Figure 8 This is a schematic diagram of the assembly and testing structure of the fixed flange, installed pipes, valves, and pipe pagoda structure in the application embodiment.

[0030] The following are the labeling elements in the figures:

[0031] a. Second charging port; b. Support frame; c. Water jacket ring beam; d. Copper water jacket; e. Steel water jacket; f. Flue gas interface water jacket; g. Furnace top water jacket; h. First charging port;

[0032] 1. Feed inlet water jacket; 2. Support; 3. Second feed inlet; 4. Copper water jacket; 5. Steel water jacket; 51. Water inlet; 52. Water outlet; 53. Mounting flange; 54. Fixing flange; 55. Installing pipe; 56. Valve; 57. Pipe pagoda joint; 6. Flue interface water jacket; 7. Support; 71. Crossbeam; 72. Fixing plate; 73. Fixing screw; 74. Fastening nut; 75. Gasket; 76. Base plate; 77. Rib plate; 78. Pad plate; 79. Cover plate; 8. First feed inlet. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] like Figures 3-6 As shown, a side-blown furnace according to an embodiment of this application will now be described. This side-blown furnace includes: a furnace base (not shown), a support 2, a furnace hearth (not shown), a copper water jacket 4, a steel water jacket 5, and a flue inlet water jacket 6. The support 2 and the furnace hearth are mounted on the furnace base. The copper water jacket 4 is mounted on the furnace hearth and consists of three layers: a first layer, a second layer, and a third layer, from bottom to top. A single steel water jacket 5 is mounted on the third layer of copper water jackets. Multiple steel water jackets 5 form a flue, and the top of each steel water jacket 5 is provided with a flue inlet water jacket 6. These are all components found in existing side-blown furnaces and will not be described in detail here.

[0038] The improvement of the side-blown furnace provided in this embodiment lies in the installation method of the molten steel jacket 5 and the support 2. Specifically, the upper outer side of each molten steel jacket 5 is connected to the support 2 via a support 7; four crossbeams 71 are provided on the support 2, surrounding multiple molten steel jackets 5, and each support 7 is connected to the crossbeam 71. Each molten steel jacket 5 is connected to the crossbeam 71 on the support 2 via a support 7. The molten steel jacket 5 can be assembled with the support 7 first, and then hoisted as a whole and connected to the crossbeam 71, thus improving installation efficiency. The crossbeams 71 are made of structural steel, and the support frame is made of steel components, so they are not affected by the high temperature inside the furnace and there is no problem of water leakage, ensuring the safety and stability of the structure.

[0039] Specifically, the support 7 includes a base plate 76, ribs 77, and pads 78. The ribs 77 are right-angled plates, preferably right-angled trapezoidal plates. The bottom edge of the ribs 77 is connected to the base plate 76, and the side edge of the ribs 77 is connected to the pads 78. The pads 78 are fixed to the outside of the steel jacket 5. The base plate 76 is connected to the crossbeam 71. To ensure the support strength, at least two ribs 77 are provided. To ensure the connection strength between the ribs 77 and the pads 78, the pads 78 are provided with cover plates 79 that abut against the top edge of each rib 77. The cover plates 79 are welded to the pads 78 and also to the top edge of the ribs 77.

[0040] In this embodiment, the crossbeam 71 is provided with a fixing screw 73, and the base plate 76 is provided with a through hole. The fixing screw 73 passes through the through hole and is screwed with a fastening nut 74. The through hole is an oblong hole, which can accommodate assembly errors and facilitates the overall hoisting. All fixing screws 73 pass through the corresponding through holes. The base plate 76 and the crossbeam 71 are fixedly connected by the fixing screw 73 and the fastening nut 74. To ensure that the fastening nut 74 is tightened and does not loosen, a washer 75 is fitted on the fixing screw 73 between the fastening nut 74 and the base plate 76. The washer 75 includes a flat washer and a spring washer, which can effectively prevent the fastening nut 74 from loosening.

[0041] In this embodiment, a fixing plate 72 is provided on the crossbeam 71, and a fixing screw 73 is also fixedly connected to the fixing plate 72. Specifically, the fixing screw 73 is a fastening screw. The nut of the fastening screw is first welded to the crossbeam 71. The fixing plate 72 has a welding hole, and the thickness of the fixing plate 72 is the same as the thickness of the nut. The nut is accommodated in the welding hole, and then the nut is welded to the fixing plate 72. The function of the fixing plate 72 is to enhance the firmness between the fixing screw 73 and the crossbeam 71, and to effectively prevent the fixing screw 73 from tilting.

[0042] In this embodiment, the fixing plate 72 is welded to the crossbeam 71, the bottom plate 76 is welded to the rib plate 77, the rib plate 77 is welded to the pad plate 78, and the pad plate 78 is welded to the steel jacket 5.

[0043] Another improvement in this embodiment is that a charging port water jacket 1 is provided on the third layer of copper water jacket, and a first feed port 8 and a second feed port 3 are provided on the charging port water jacket 1. Compared with the prior art, the original furnace top water jacket near the flue is eliminated, and the second feed port on the original furnace top water jacket is set on the charging port water jacket 1, so that the first feed port 8 and the second feed port 3 are at the same height. In this way, the material will not be directly carried away by the flue after feeding, and this position is close to the molten pool and combustion gun in the furnace, which is conducive to the complete combustion of the material and reduces the dust rate; at the same time, the two feed ports are at the same height, which also facilitates maintenance.

[0044] Existing molten steel jackets typically consist of only an inlet, an outlet, and a cleaning hole. This cleaning hole is located below the central axis of the jacket. Because the side-blown furnace operates at high temperatures, impurities in the water accumulate inside the jacket and deposit at the bottom, especially at the two bottom corners. This accumulation prevents water from entering for cooling, causing the jacket to burn out due to lack of cooling. This results in water leakage into the side-blown furnace, requiring a shutdown for maintenance and impacting production efficiency. Furthermore, water entering molten liquid at over 1000 degrees Celsius can cause an explosion, posing a safety hazard. However, during normal production, water cannot be shut off from the jacket; the cleaning hole can only be opened to remove debris deposited at the bottom of the jacket during furnace shutdown for maintenance. In practice, often a significant amount of debris has already accumulated inside the jacket before maintenance is scheduled, frequently leading to jacket burnout and leakage. Moreover, the debris is concentrated in the bottom corners, making cleaning difficult.

[0045] To address the aforementioned problems, in this embodiment, as follows: Figure 7 and Figure 8 As shown, the steel jacket 5 is improved to solve the problem of impurity deposition. Specifically, the steel jacket 5 is provided with an inlet 51 and an outlet 52, with the inlet 51 located below the outlet 52. The inlet 51 and outlet 52 are connected to the inlet pipe and outlet pipe, respectively, to achieve water circulation for cooling the steel jacket 5. The bottom of the steel jacket 5 also has two cleaning ports, located at the corners of the steel jacket 5. A mounting flange 53 is provided at each cleaning port, and a fixing flange 54 is mounted on the mounting flange 53 by a ring of bolts. A sealing ring is provided between the mounting flange 53 and the fixing flange 54 to ensure a tight seal. An installation pipe 55 is provided on the fixing flange 54, and a valve 56 is provided on the installation pipe 55. The installation pipe 55 can be connected to an external water supply pipe and an external water return pipe, and the valve 56 controls the opening and closing of the installation pipe 55. Preferably, the installation pipe 55 is provided with a pipe pagoda connector 57 for quick connection to an external water supply pipe or an external water return pipe.

[0046] Preferably, the installation pipe 55 is a steel pipe, which is welded to the fixed flange 54. The pipe pagoda joint 57 is a steel joint or a copper joint. The through hole diameter of the installation flange 53 is 110mm, so that during furnace shutdown maintenance, workers can reach into the molten steel jacket 5 for inspection and cleaning. Preferably, the valve 56 is a manual valve.

[0047] Under normal circumstances, the fixed flange 54 is fixedly connected to the mounting flange 53, and the valve 56 is in the closed state. Water in the steel jacket 5 cannot flow out from the cleaning port, so the steel jacket 5 can be used normally.

[0048] When it is necessary to remove impurities from the inner bottom of the molten steel jacket 5, one of the pipe pagoda joints 57 is connected to the external water supply pipe, and the other pipe pagoda joint 57 is connected to the external water return pipe. Then, both valves 56 are opened, allowing external water to flow in from one cleaning port and out from the other, thus flushing the inner bottom of the molten steel jacket 5 and preventing the accumulation of impurities. After flushing for a period of time, the two valves 56 are closed, and the external water supply and return pipes connected to the two pipe pagoda joints 57 are swapped. Then, the two valves 56 are opened again to flush the inner bottom of the molten steel jacket 5 once more. This operation effectively cleans the impurities inside the molten steel jacket 5, providing good protection for it. Moreover, this process can be performed online without shutting down the side-blown furnace, ensuring both safety and production efficiency. When the side-blown furnace is shut down, the fixed flange 54 and the mounting flange 53 can be separated, allowing workers to inspect and clean the inside of the molten steel jacket 5 through the mounting flange 53.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A side-blown furnace, comprising: The furnace base, support (2), furnace hearth, copper water jacket (4), steel water jacket (5), and flue interface water jacket (6) are provided. The copper water jacket (4) is provided in three layers, namely the first layer, the second layer, and the third layer from bottom to top. The steel water jacket (5) is provided in one layer and is provided on the third layer of copper water jacket. Multiple steel water jackets (5) form a flue. The top of multiple steel water jackets (5) is provided with a flue interface water jacket (6). The characteristic is that the upper outer side of each steel water jacket (5) is connected to the support (2) through a support (7). The support (2) is provided with four crossbeams (71) surrounding the steel water jacket (5). The support (7) is connected to the crossbeams (71).

2. The side-blown furnace as described in claim 1, characterized in that: The support (7) includes a base plate (76), a rib plate (77) and a pad plate (78). The bottom edge of the rib plate (77) is connected to the base plate (76), and the side edge of the rib plate (77) is connected to the pad plate (78). The pad plate (78) is fixed to the outside of the steel jacket (5). The base plate (76) is connected to the crossbeam (71).

3. The side-blown furnace as described in claim 2, characterized in that: The ribs (77) are provided in at least two pieces.

4. The side-blown furnace as described in claim 3, characterized in that: The pad (78) is provided with a cover plate (79) that abuts against the top edge of each of the ribs (77).

5. The side-blown furnace as described in claim 4, characterized in that: The crossbeam (71) is provided with a fixing screw (73), the base plate (76) is provided with a through hole, and the fixing screw (73) passes through the through hole and is screwed with a fastening nut (74).

6. The side-blown furnace as described in claim 5, characterized in that: A washer (75) is fitted on the fixing screw (73) between the fastening nut (74) and the base plate (76).

7. The side-blown furnace as described in claim 6, characterized in that: A fixing plate (72) is provided on the crossbeam (71), and the fixing screw (73) is fixedly connected to the fixing plate (72).

8. The side-blown furnace as described in claim 7, characterized in that: The fixing plate (72) is welded to the crossbeam (71), the bottom plate (76) is welded to the rib plate (77), the rib plate (77) is welded to the pad plate (78), and the pad plate (78) is welded to the steel jacket (5).

9. The side-blown furnace as described in any one of claims 1-8, characterized in that: The third layer of copper water jacket is provided with a feed port water jacket (1), and the feed port water jacket (1) is provided with a first feed port (8) and a second feed port (3).

10. The side-blown furnace as described in any one of claims 1-8, characterized in that: The bottom of the molten steel jacket (5) is provided with two cleaning ports, which are respectively located at the corners of the molten steel jacket (5). The cleaning ports are provided with mounting flanges (53). A fixing flange (54) is installed on the mounting flange (53) by a ring of bolts. A sealing ring is provided between the mounting flange (53) and the fixing flange (54). An installation pipe (55) is provided on the fixing flange (54), and a valve (56) is provided on the installation pipe (55).

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