Zinc oxide rotary kiln

Abstract

The utility model relates to the technical field of rotary kiln, proposes a zinc oxide rotary kiln, including the kiln body, the inside of kiln body is equipped with a plurality of heating flow cavity for the material heating, is equipped with the screen between adjacent heating flow cavity, and the screen is fixedly arranged in the inside of kiln body. Through the above technical scheme, the problem that the gap between the large -grained material is easy to be blocked by small -grained material and thereby influences the heating uniformity of large -grained material in the related art is solved.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, specifically to a zinc oxide rotary kiln. Background Technology

[0002] A zinc oxide rotary kiln generally refers to a key piece of equipment used to produce zinc oxide. It is mainly used to process zinc-containing materials (such as zinc ore and zinc slag) and convert them into zinc oxide through high-temperature calcination.

[0003] However, in the actual use of rotary kilns, it has been found that due to the non-uniformity of material particles (zinc ore particles), there are often smaller material particles between adjacent material particles. The presence of these small particles can easily block the gaps between large particles, making it difficult for the outer surface of the large particles to fully contact the hot airflow in the rotary kiln. This can lead to uneven heating of the large particles, resulting in a decline in product quality, such as affecting the purity and performance of zinc oxide. Utility Model Content

[0004] This invention proposes a zinc oxide rotary kiln, which solves the problem in related technologies that the gaps between large particles are easily blocked by small particles, thus affecting the heating uniformity of the large particles.

[0005] The technical solution of this utility model is as follows:

[0006] A zinc oxide rotary kiln includes a kiln body, the kiln body having a plurality of heating flow chambers for heating materials, and a screen being provided between adjacent heating flow chambers, the screens being fixedly installed inside the kiln body.

[0007] Furthermore, each of the screens is connected end to end in a ring structure, and each screen is installed inside the kiln body.

[0008] Furthermore, the screen mesh diameter of the screen closest to the center of rotation of the kiln is larger than the screen mesh diameter of the screen far from the center of rotation of the kiln.

[0009] Furthermore, a plurality of first fixing rods are provided between the screen and the inner wall of the kiln, and a plurality of second fixing rods are provided between adjacent screens. The two ends of each first fixing rod are respectively fixedly connected to the screen and the inner wall of the kiln, and the two ends of each second fixing rod are respectively adjacent to the screen.

[0010] Furthermore, each of the first fixed rods and each of the second fixed rods are evenly distributed around the screen and arranged linearly in sequence along the axial direction of the screen.

[0011] Furthermore, the projection surfaces of each of the first and second fixing rods in their axial directions are all circular.

[0012] Furthermore, the first and second fixed rods adjacent to each other in the radial direction of the kiln body are staggered; the second fixed rods adjacent to each other in the radial direction of the kiln body are staggered.

[0013] Furthermore, each of the screens is provided with a connecting part for cooperating with the first fixing rod or the second fixing rod.

[0014] The working principle and beneficial effects of this utility model are as follows:

[0015] The kiln body of this invention is provided with several heating flow chambers, and a screen is provided between adjacent heating flow chambers. The screen separates materials of different sizes to classify the materials in the kiln body, so that the materials in each heating flow chamber are basically the same size. This effectively avoids the presence of smaller materials between adjacent materials, thereby ensuring that there is a path for the heating airflow between adjacent materials, ensuring that each material is heated evenly, thus ensuring the heating effect of the materials in the kiln body and ensuring product quality.

[0016] Meanwhile, in order to ensure that the relative positions of each screen inside the kiln body do not change during the kiln body's rotation, each screen is fixedly installed inside the kiln body to ensure that the screen can stably screen the material flowing due to the rotation of the kiln body. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a structural diagram of the supporting equipment such as the rotating device in this embodiment.

[0019] Figure 2 This is a cross-sectional view of this embodiment;

[0020] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0021] Figure 4 This is the front view of this embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of the screen when it is unfolded in this embodiment.

[0023] In the picture:

[0024] 1. Kiln body; 11. Heating flow chamber; 2. Screen; 21. Connecting part; 3. First fixing rod; 4. Second fixing rod. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] like Figure 1 , Figure 2 As shown, this embodiment proposes a zinc oxide rotary kiln, which mainly includes the kiln body 1 itself. Therefore, the use of this embodiment requires the use of traditional rotary kiln supporting equipment such as a drive device for driving the kiln body 1 to rotate. The specific connection between the kiln body 1 and the rotary kiln supporting equipment should be determined according to the actual production line situation, and will not be elaborated in this embodiment.

[0027] Specifically, the kiln body 1 is equipped with several heating flow chambers 11 for heating materials. Each adjacent heating flow chamber 11 is equipped with a screen 2. That is, there are multiple chambers inside the kiln body 1, and the screens 2 between adjacent chambers play the role of screening materials. This ensures that the material size in each heating flow chamber 11 is close to uniform, effectively avoiding the presence of smaller materials between adjacent materials. This would prevent the hot airflow in the kiln body 1 from being easily obstructed when passing between adjacent materials. This ensures that the hot airflow can fully cover each material particle, guaranteeing the uniform heating of material particles of various sizes, and thus ensuring product quality by guaranteeing the heating effect of the materials.

[0028] Secondly, in order to facilitate the flow of materials in each heating flow chamber 11 as the kiln body 1 rotates, each screen 2 in this embodiment is connected end to end in a ring structure, and each screen 2 is fitted inside the kiln body 1, that is, each heating flow chamber 11 is located in the inner ring of each screen 2, so that the materials in each heating flow chamber 11 can still roll evenly in contact with the circular inner wall, avoiding material accumulation or poor sliding.

[0029] Meanwhile, the screen mesh 2 closest to the rotation center of the kiln body 1 has a larger screen mesh diameter than the screen mesh 2 farther away from the rotation center of the kiln body 1. That is, each screen mesh 2 is arranged in stages according to its screen mesh diameter. The closer the screen mesh 2 is to the inner wall of the kiln body 1, the smaller its screen mesh diameter, thus enabling this embodiment to have a multi-stage screening function. Correspondingly, the screen mesh 2 closest to the rotation center of the kiln body 1 has the largest screen mesh diameter. The material particles in the heating flow chamber 11 (hereinafter referred to as the high-temperature flow chamber to distinguish it from other heating flow chambers 11) are the largest. Since the burner used to heat the internal environment of the kiln body 1 is usually coaxially set with the kiln body 1, the high-temperature flow chamber can have a higher temperature than other heating flow chambers 11 due to its positional advantage, making it easier for large material particles to be heated, thereby improving the heating effect on large material particles.

[0030] Furthermore, as the kiln body 1 rotates and drives the material inside to flow, the material particles will also be reduced in size due to collisions with each other and with the screen 2, and then screened by the screen 2 into the next stage of heating flow chamber 11. Moreover, the presence of each screen 2 adds multiple additional material contact surfaces inside the kiln body 1, allowing the material to collide multiple times during the step-by-step screening process, thereby increasing the probability of material breakage during operation in this embodiment, thus reducing the size of the material particles and facilitating the heating of the material.

[0031] In this embodiment, each screen 2 is preferably made of iron-chromium-aluminum fiber sintered felt, which has excellent high-temperature resistance and can withstand high temperatures of 1200℃, so as to ensure the structural stability of each screen 2 inside the kiln body 1.

[0032] like Figures 3-4 As shown, in this embodiment, the screen 2 is fixedly installed inside the kiln body 1. Thus, when the kiln body 1 is rotated by an external driving device, the screen 2 located in the kiln body 1 will rotate together with the kiln body 1, and the relative position between the two remains unchanged, so as to ensure that the screen 2 can stably screen the material in the flowing state in the kiln body 1.

[0033] Specifically, a number of first fixing rods 3 are provided between the screen 2 and the inner wall of the kiln body 1, and a number of second fixing rods 4 are provided between adjacent screens 2. The two ends of each first fixing rod 3 are fixedly connected to the screen 2 and the inner wall of the kiln body 1, respectively. The two ends of each second fixing rod 4 are adjacent to the screen 2, that is, each screen 2 is fixedly connected to each other through each second fixing rod 4. The screen 2 that is close to the inner wall of the kiln body 1 is fixedly connected to the kiln body 1 through each first fixing rod 3, thereby realizing the fixed installation of each screen 2 in the kiln body 1.

[0034] Each first fixing rod 3 and each second fixing rod 4 are evenly distributed around the screen 2 and arranged linearly in sequence along the axial direction of the screen 2, ensuring that each first fixing rod 3 and each second fixing rod 4 can provide uniform and balanced support for each screen 2, and ensuring the stability of each screen 2 inside the kiln body 1.

[0035] The projection surfaces of each first fixing rod 3 and each second fixing rod 4 in their axial direction are all circular. Compared with the use of rectangular fixing rods, the circular design of the fixing rods can effectively avoid the formation of plane angles between each first fixing rod 3 and the inner wall of the kiln body 1, and between each second fixing rod 4 and the screen 2. When the kiln body 1 itself has an inclined angle, the material between each first fixing rod 3 and the inner wall of the kiln body 1, and between each second fixing rod 4 and the screen 2, can flow along the curved surface of each fixing rod. It is less likely that material particles will get stuck between each first fixing rod 3 and the inner wall of the kiln body 1, and between each second fixing rod 4 and the screen 2, thereby avoiding material residue inside the kiln body 1.

[0036] Meanwhile, the first fixing rod 3 and the second fixing rod 4 adjacent to each other in the radial direction of the kiln body 1 are staggered; the second fixing rod 4 adjacent to each other in the radial direction of the kiln body 1 are staggered. That is, by means of the staggered design of each fixing rod, the pressure of material particles acting on the screen 2 is dispersed, stress concentration is reduced, thereby enhancing the support structure of the screen 2 and improving its overall stability.

[0037] like Figures 3-5 As shown, each screen 2 in this embodiment is provided with a connecting part 21 for cooperating with the first fixing rod 3 or the second fixing rod 4, so that the screen 2 can cooperate with each first fixing rod 3 or each second fixing rod 4. Because compared with the mesh structure, the curved structure can maintain more contact area with each fixing rod, thereby ensuring that each fixing rod can provide more stable support for each screen 2.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A zinc oxide rotary kiln, comprising a kiln body (1), characterized in that, The kiln body (1) is provided with several heating flow chambers (11) for heating materials. A screen (2) is provided between adjacent heating flow chambers (11). The screen (2) is fixedly installed inside the kiln body (1).

2. The zinc oxide rotary kiln according to claim 1, characterized in that, Each of the screens (2) is connected end to end in a ring structure, and each of the screens (2) is set inside the kiln body (1).

3. The zinc oxide rotary kiln according to claim 2, characterized in that, The diameter of the screen hole of the screen (2) close to the rotation center of the kiln body (1) is larger than the diameter of the screen hole of the screen (2) far away from the rotation center of the kiln body (1).

4. The zinc oxide rotary kiln according to claim 2 or 3, characterized in that, A plurality of first fixing rods (3) are provided between the screen (2) and the inner wall of the kiln body (1), and a plurality of second fixing rods (4) are provided between adjacent screens (2). The two ends of each first fixing rod (3) are fixedly connected to the screen (2) and the inner wall of the kiln body (1), and the two ends of each second fixing rod (4) are adjacent to the screen (2).

5. The zinc oxide rotary kiln according to claim 4, characterized in that, Each of the first fixing rods (3) and each of the second fixing rods (4) are evenly distributed around the screen (2) and arranged linearly in sequence along the axial direction of the screen (2).

6. The zinc oxide rotary kiln according to claim 4, characterized in that, The projection surfaces of each of the first fixing rods (3) and each of the second fixing rods (4) in their axial direction are all circular.

7. The zinc oxide rotary kiln according to claim 4, characterized in that, The first fixed rod (3) and the second fixed rod (4) adjacent to each other in the radial direction of the kiln body (1) are staggered; the second fixed rods (4) adjacent to each other in the radial direction of the kiln body (1) are staggered.

8. The zinc oxide rotary kiln according to claim 4, characterized in that, Each of the screens (2) is provided with a connecting part (21) for cooperating with the first fixing rod (3) or the second fixing rod (4).

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