A combined high-temperature material feeding hopper

Abstract

This utility model relates to a combined high-temperature material feeding hopper, including a feeding hopper and a cylindrical cooling feeding pipe. The feeding hopper has an inclined conical feeding structure that is larger at the top and smaller at the bottom. The slope of the left feeding face is greater than that of the right feeding face. The left feeding face has a wear-resistant inner layer and an outer layer. A slag-removing hole is provided on the right feeding face. The cylindrical cooling feeding pipe is connected to the bottom of the feeding hopper and is inclined to the right. A cooling jacket is formed by the inner wall and outer wall of the feeding pipe. A slag-removing hole is provided on the right side of the cylindrical cooling feeding pipe. Both the hopper slag-removing hole and the feeding pipe slag-removing hole have detachable sealing slag-removing gates. The bottom of the cylindrical cooling feeding pipe has a discharge port connected to the inlet of a slag cooler. Through the asymmetrical design of the inclined conical hopper, the wear-resistant left feeding face, and the slag-removing right side, combined with the right-inclined water-cooled cylindrical feeding pipe, a combination of cooling and slag removal is achieved, which extends the wear life, improves the slag removal efficiency, and reduces the outlet material temperature.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and more specifically to a combined high-temperature material feeding hopper. Background Technology

[0002] In the smelting processes of non-ferrous metals such as tin and lead, the rotary kiln roasting temperature needs to be increased to 1200℃-1300℃ to achieve efficient arsenic removal. However, the high-temperature operating conditions result in the discharged material being in a semi-molten state, leading to the following technical bottlenecks:

[0003] 1. Increased wear and corrosion of the feed hopper: The high-temperature material flow continuously erodes the feed hopper wall (especially the left side facing the material). The traditional single-layer Q235 steel plate feed hopper has a service life of less than 60 days. Frequent shutdowns for repair welding of the feed hopper reduce the equipment operating rate.

[0004] 2. Risk of slag buildup and blockage in the hopper: Softened material may stick and accumulate on the inner wall of the hopper, especially in gentle slope areas with an inclination angle of <45° (such as the right side of the hopper). After blockage, manual tapping is required to clear the blockage, which poses a risk of high-temperature burns.

[0005] 3. Uncontrolled heat conduction: The material temperature is conducted to the downstream slag cooler through the hopper, causing the seals of the slag cooler to age and fail.

[0006] Limitations of existing solutions:

[0007] 1) Existing technology using fully lined wear-resistant steel plates extends the service life of hoppers to about 4 months, but it does not solve the slagging problem and increases costs;

[0008] 2) Existing technologies use water-cooled jacketed feed pipes, which can cool down to 350℃, but they are straight cylindrical structures and cannot be adapted to the diffusion-type material flow of rotary kiln discharge.

[0009] 3) Existing technologies have found that side-opening slag removal doors are effective in normal temperature scenarios, but under high temperature conditions, the door body deforms due to heat, leading to seal failure and the risk of material spraying.

[0010] Therefore, existing single-function improvement schemes cannot simultaneously meet the synergistic requirements of wear resistance, anti-clogging, and temperature control, thus restricting the efficient smelting of high-grade metal ores. Utility Model Content

[0011] Therefore, the purpose of this utility model is to propose a combined high-temperature material feeding hopper to solve the shortcomings of the existing feeding hoppers.

[0012] The technical solution of this utility model is a combined high-temperature material feeding hopper, installed between the rotary kiln outlet and the slag cooler, comprising:

[0013] The feeding hopper has a sloping conical feeding structure that is larger at the top and smaller at the bottom. The slope of the left feeding face is greater than that of the right feeding face. The left feeding face has a wear-resistant inner layer and an outer layer. The right feeding face is equipped with a slag cleaning hole. The top of the hopper is a feed inlet that connects to the rotary kiln outlet.

[0014] A cylindrical cooling discharge pipe is connected below the discharge hopper and is arranged at an angle to the right. The inner wall of the discharge pipe and the outer wall of the discharge pipe form a cooling jacket. A slag cleaning hole is provided on the right side of the discharge pipe. A detachable slag cleaning gate is provided on both the slag cleaning hole of the discharge hopper and the slag cleaning hole of the discharge pipe. The bottom of the cylindrical cooling discharge pipe has a discharge port that is connected to the feed port of the slag cooler.

[0015] According to the hopper of this utility model, the feed inlet extends outward with a surrounding edge, and a corresponding grid is provided on the feed inlet.

[0016] According to the feeding hopper of this utility model, the angle A between the outer wall of the right feeding inclined surface of the feeding hopper and the horizontal line satisfies 60°≤A≤165°, and the angle B between the outer wall of the left receiving surface and the horizontal line satisfies 30°≤B≤90°; the angle C between the outer wall of the left side of the cylindrical cooling feeding pipe and the horizontal line satisfies 45°≤C≤75°.

[0017] According to the present invention, the wear-resistant inner layer is a 10-20mm thick 16Mn steel plate, and the remaining wall surfaces of the hopper are made of 8-10mm thick steel plates.

[0018] According to the feeding hopper of this utility model, the lower end of the cooling jacket has a water inlet and the upper end has a water outlet.

[0019] According to the present invention, the slag removal hole of the hopper and the slag removal hole of the discharge pipe are located in the same vertical plane.

[0020] According to the feeding hopper of this utility model, the grid spacing of the grid is 1.5-2 times the maximum particle size of the material.

[0021] According to the present invention, the feeding hopper and the cylindrical cooling feeding pipe are connected by assembly and welding of triangular wear-resistant steel plates.

[0022] According to the hopper of this utility model, a flange is provided at the discharge port.

[0023] As can be seen from the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0024] 1. This utility model achieves a wear-resistant life of up to 6 months by combining an inclined cone bucket (asymmetrical, wear-resistant left side receiving surface + slag removal right side) with a right-inclined water-cooled cylindrical discharge pipe (cooling + slag removal); slag removal efficiency is increased by 70% (double slag removal doors operate on the same side); and the outlet material temperature is reduced to below 350℃, ensuring the safety of the cold slag machine's seals.

[0025] 2. The feed inlet surround + grid of this utility model solves the problem of blockage by large-diameter materials, reducing the blockage rate by 90%.

[0026] 3. The optimization of the included angles A, B, and C in this utility model solves the problems of left-side flushing / right-side slag accumulation / flow rate control. The material flow rate has been tested to be greater than or equal to 1.2 m / s.

[0027] 4. The material and thickness of the wear-resistant inner layer in this utility model solve the problem of high cost of full-lined wear-resistant materials.

[0028] 5. In this utility model, the slag removal gates of the hopper and the discharge pipe are arranged on the same vertical plane, which solves the problem of insufficient slag removal operation space, and the slag removal time for a single operation is ≤5 minutes.

[0029] 6. The flange in this utility model facilitates the installation of the slag cooler and reduces installation time. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This utility model provides a structural schematic diagram of a combined high-temperature material feeding hopper;

[0032] Figure 2 A longitudinal sectional view of a combined high-temperature material feeding hopper provided by this utility model;

[0033] Figure 3 A longitudinal sectional view of the cylindrical cooling feed pipe is shown.

[0034] In the diagram: 1. Feed hopper, 1-1 Feed hopper cleaning hole, 1-2 Wear-resistant inner layer, 1-3 Outer layer, 1-4 Feed inlet, 1-5 Surrounding edge, 1-6 Grating; 2. Cylindrical cooling feed pipe, 2-1 Feed pipe cleaning hole, 2-2 Feed pipe inner wall, 2-3 Feed pipe outer wall, 2-4 Water inlet, 2-5 Water outlet, 2-6 Discharge outlet, 2-7 Flange. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "tilted", "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 utility model 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 utility model.

[0037] In the smelting processes of non-ferrous metals such as tin and lead, the rotary kiln roasting temperature needs to be increased to 1200℃-1300℃ to achieve efficient arsenic removal. Because existing technologies only address part of the problem from a single direction with the feeding hopper, they cannot simultaneously meet the synergistic requirements of wear resistance, blockage prevention, and temperature control, thus hindering the efficient smelting of high-grade metal ores.

[0038] In view of this, the present invention provides a combined high-temperature material feeding hopper, installed between the rotary kiln outlet and the slag cooler, see attached figure. Figure 1-3 It includes: a feeding hopper 1 and a cylindrical cooling feeding pipe 2;

[0039] The hopper 1 has a tapered feeding structure that is wider at the top and narrower at the bottom. The slope of the left feeding surface is greater than that of the right feeding surface. The left feeding surface has a wear-resistant inner layer 1-2 and an outer layer 1-3. The right feeding surface has a hopper cleaning hole 1-1. The top of the hopper is a feed inlet 1-4 connected to the rotary kiln outlet. The cylindrical cooling feeding pipe 2 is connected to the bottom of the hopper 1 and is arranged at an angle to the right. The inner wall 2-2 and the outer wall 2-3 of the feeding pipe form a cooling jacket. The right side of the cylindrical cooling feeding pipe has a feeding pipe cleaning hole 2-1. Both the hopper cleaning hole 1-1 and the feeding pipe cleaning hole 2-1 have detachable slag cleaning gates. The bottom of the cylindrical cooling feeding pipe 2 has a discharge outlet 2-6 connected to the slag cooler inlet.

[0040] The above embodiments, through the asymmetrical design of the inclined cone bucket, the wear-resistant left side of the material receiving surface, and the slag removal on the right side, combined with the right-inclined water-cooled cylindrical discharge pipe which has both cooling and slag removal functions, achieve a wear-resistant life of up to 6 months; the use of dual slag removal doors operating on the same side improves slag removal efficiency; and the outlet material temperature is reduced to below 350℃, ensuring the safety of the cold slag machine's seals.

[0041] See appendix Figure 1 The feed inlet 1-4 extends outward with a surrounding edge 1-5, and a corresponding grid 1-6 is provided on the feed inlet 1-4. The grid spacing of the grid 1-6 is 1.5-2 times the maximum particle size of the material. This solves the problem of blockage by large-diameter materials.

[0042] See appendix Figure 2 The angle A between the outer wall of the right-side inclined surface of the hopper 1 and the horizontal line satisfies 60°≤A≤165°, and the angle B between the outer wall of the left-side welcoming surface and the horizontal line satisfies 30°≤B≤90°; that is, the welcoming slope of the left-side welcoming surface is greater than that of the right-side surface. In other words, the gentle slope design of the left-side welcoming surface prolongs the impact residence time and reduces the scouring kinetic energy; the steep slope design of the right-side surface accelerates material flow and suppresses slag accumulation. More advantageously, the angle C between the outer wall of the left-side surface of the cylindrical cooling discharge pipe 2 and the horizontal line satisfies 45°≤C≤75°.

[0043] Advantageously, the wear-resistant inner layer 1-2 is a 10-20mm thick 16Mn steel plate, and the remaining wall surface of the hopper 1 is made of an 8-10mm thick steel plate, which can be Q235 steel plate.

[0044] In this embodiment of the invention, the lower end of the cooling jacket has a water inlet 2-4 and the upper end has a water outlet 2-5.

[0045] In this invention, the central axes of the slag cleaning hole 1-1 in the hopper and the slag cleaning hole 2-1 in the discharge pipe are located in the same vertical plane, which increases the slag cleaning operation space and improves the slag cleaning efficiency. The hopper 1 and the cylindrical cooling discharge pipe 2 are connected by triangular wear-resistant steel plates assembled and welded together. A flange 2-7 is provided at the discharge port 2-6, and the flange 2-7 is connected to the slag cooler.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] The processing steps of the lower hopper in this utility model are as follows:

[0048] Step 1: The feeding hopper 1 adopts an inclined cone structure: the inclination angle of the left inclined surface B = 50° (satisfying 30°≤B≤90°), and the inclination angle of the right inclined surface A = 120° (satisfying 60°≤A≤165°);

[0049] Layered welding: 1) Left bevel and connected surface: inner layer is welded with 16Mn wear-resistant steel plate (15mm thick), outer layer is Q235 steel plate (8mm thick); 2) Right bevel: only Q235 steel plate (10mm thick) is used, and Φ300mm slag removal hole 1-1 is opened.

[0050] Step 2: Weld the edging of feed inlets 1-4 (height 60mm), and install a grid on top (grid spacing 80mm, suitable for materials with a maximum particle size of 40-50mm).

[0051] This utility model relates to the machining of a cylindrical cooling feed pipe:

[0052] Step 1: The inner and outer walls adopt a double sleeve structure (30mm spacing), and the material is Q235 steel plate (6mm thick).

[0053] Step 2: Open a slag removal hole on the right side, with the position on the same vertical plane as the slag removal hole of the discharge hopper; weld a flange to the discharge port (the bolt holes are machined according to industry standards).

[0054] Assembly steps for the hopper and cylindrical cooling discharge pipe:

[0055] Step 1: The outlet of hopper 1 and the inlet of cylindrical tube 2 are assembled and welded by triangular wear-resistant steel plates (side length 150mm, thickness 12mm), and the weld is located on the non-material scouring surface; adjust the inclination angle of the cylindrical tube C = 60° (satisfying 45°≤C≤75°).

[0056] Step 2: Connect the feed inlet 1-4 of the hopper to the discharge outlet of the rotary kiln (3mm gap), and fix it with bolts 1-5 around the edge; connect the discharge outlet flange 2-7 to the feed inlet flange of the slag cooler, and install an asbestos sealing gasket.

[0057] In this invention, the tin roasting slag (containing large particles of 40mm) is screened by a grid, and the oversized slag is blocked at the rotary kiln outlet; cooling water is injected from the lower inlet 2-4 at an inclination of 25°, rises along the spiral guide plate to the upper outlet 2-5 at an inclination of 5°, and the water flow retention time is ≥45 seconds; after the machine is stopped, the right slag cleaning door is opened simultaneously.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A combined high-temperature material discharge hopper, which is installed between the discharge port of a rotary kiln and a slag cooler, characterized in that, include: The feeding hopper (1) has a sloping conical feeding structure that is larger at the top and smaller at the bottom. The slope of the left feeding surface is greater than that of the right feeding surface. The left feeding surface has a wear-resistant inner layer (1-2) and an outer layer (1-3). The right feeding surface is provided with a slag cleaning hole (1-1). The top of the hopper is a feed inlet (1-4) connected to the discharge port of the rotary kiln. A cylindrical cooling discharge pipe (2) is connected below the discharge hopper (1) and is arranged at an angle to the right. It forms a cooling jacket through the inner wall (2-2) and the outer wall (2-3) of the discharge pipe. A discharge pipe slag cleaning hole (2-1) is provided on its right side. A detachable slag cleaning gate is provided on both the discharge hopper slag cleaning hole (1-1) and the discharge pipe slag cleaning hole (2-1). The bottom of the cylindrical cooling discharge pipe (2) has a discharge port (2-6) connected to the feed inlet of the slag cooler.

2. The combined high-temperature material feeding hopper according to claim 1, characterized in that, The feed inlet (1-4) extends outward with a surrounding edge (1-5), and a corresponding grille (1-6) is provided on the feed inlet (1-4).

3. The combined high-temperature material feeding hopper according to claim 1, characterized in that, The angle A between the outer wall of the right side of the feeding hopper (1) and the horizontal line satisfies 60°≤A≤165°, and the angle B between the outer wall of the left side of the feeding surface and the horizontal line satisfies 30°≤B≤90°; the angle C between the outer wall of the left side of the cylindrical cooling feeding pipe (2) and the horizontal line satisfies 45°≤C≤75°.

4. The combined high-temperature material feeding hopper according to claim 1, characterized in that, The wear-resistant inner layer (1-2) is a 10-20mm thick 16Mn steel plate, and the remaining walls of the hopper (1) are made of 8-10mm thick steel plates.

5. A combined high-temperature material feeding hopper according to claim 1, characterized in that, The cooling jacket has a water inlet (2-4) at the lower end and a water outlet (2-5) at the upper end.

6. A combined high-temperature material feeding hopper according to any one of claims 1-5, characterized in that, The central axes of the slag removal hole (1-1) in the hopper and the slag removal hole (2-1) in the discharge pipe are located in the same vertical plane.

7. A combined high-temperature material feeding hopper according to claim 2, characterized in that, The grid spacing of the grid (1-6) is 1.5-2 times the maximum particle size of the material.

8. A combined high-temperature material feeding hopper according to any one of claims 1-5, characterized in that, The feeding hopper (1) and the cylindrical cooling feeding pipe (2) are connected by triangular wear-resistant steel plates through assembly and welding.

9. A combined high-temperature material feeding hopper according to any one of claims 1-5, characterized in that, A flange (2-7) is provided at the discharge port (2-6).

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