A device for cleaning the ring formed at the mouth of a zinc extraction rotary kiln

Abstract

The utility model belongs to rotary kiln ring forming cleaning technical field, specifically disclose a kind of zinc extraction rotary kiln mouth ring forming cleaning device, including trolley, the bottom of trolley is laid the track for trolley pulley directional movement, and one end of trolley is detachably connected with support rod, and the flange of one end of support rod is connected with execution rod, and the one end of execution rod is detachably connected with several trapezoidal steel plates, and the upper bottom of trapezoidal steel plate is connected with execution rod, and the bottom of support rod is equipped with support structure. For the rotary kiln ring forming method of existing, need to stop kiln, lead to the waste of production time and the problem of increasing production cost. The utility model through trolley track directional movement, trapezoidal steel plate and rotary kiln self-rotating cooperation, only need to reduce kiln speed and fan speed appropriately, can complete cleaning under kiln body operating state, maintain kiln mouth ring forming controlled state, effectively avoid the production interruption caused by long time stop kiln, significantly improve the rotary kiln operation rate.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln ring cleaning technology, specifically to a device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln. Background Technology

[0002] Rotary kilns for zinc extraction are a metallurgical technology based on the principle of high-temperature reduction and volatilization, primarily used for processing low-grade zinc ore, zinc-containing dust, and secondary resources. The zinc removal rate of rotary kilns can generally reach over 90%, and they are widely used in the metallurgical and mineral processing fields. Due to their relatively low investment and simple operation, both large enterprises and small factories can select suitable rotary kiln equipment according to their own needs and production scale. Some steel companies use rotary kiln zinc extraction technology when processing their own zinc-containing dust and sludge, transforming waste into valuable zinc resources, thus solving environmental problems and creating economic benefits.

[0003] During the zinc extraction process in a rotary kiln, materials gradually adhere to the inner wall of the kiln, forming a ring-shaped hard mass, known as a ring. This ring severely hinders the normal flow of materials and flue gas within the kiln, resulting in uneven pressure distribution, affecting heat exchange efficiency, and consequently reducing product quality. As the ring thickness increases, manual cleaning becomes increasingly difficult. At this point, the kiln is typically shut down, and mechanical crushing or artificial oxygen cutting is used to remove the ring. Mechanical crushing usually employs specialized crushing equipment to break up and remove the ring; artificial oxygen cutting utilizes the high temperature generated by the combustion of a mixture of oxygen and combustible gas to melt and break the ring.

[0004] However, both methods require stopping the rotary kiln, which typically takes 3-4 hours per process. During this time, the entire production process is at a standstill, which not only wastes production time but also increases production costs and seriously affects the rotary kiln's operating rate. Utility Model Content

[0005] The purpose of this invention is to provide a device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln, in order to solve the problem that existing methods for cleaning rings in rotary kilns require kiln shutdown, resulting in wasted production time and increased production costs.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln, comprising a trolley, the bottom of which is laid with a track for the trolley pulley to move in a directional manner, a support rod detachably connected to one end of the trolley, an execution rod connected to one end of the support rod by a flange, a plurality of trapezoidal steel plates detachably connected to one end of the execution rod, the upper bottom of the trapezoidal steel plates being connected to the execution rod, and a support structure provided at the bottom of the support rod.

[0007] The working principle of this utility model is as follows: A device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln. When it is necessary to clean the rings in the rotary kiln, firstly, the kiln speed is reduced from the normal production value by 2-3 Hz, and the blower speed is reduced by 10 Hz, with the standard being that no ash is sprayed out of the kiln mouth, to prevent high-temperature dust from overflowing from the kiln and affecting the working environment and personnel safety; then, according to the height of the rotary kiln mouth, the height of the support rod of the support structure is used to ensure that the support rod is horizontally aligned with the kiln mouth; next, the temperature of the ring-forming area at the kiln mouth is raised to above 600℃; then, one side of the rotary kiln door is opened, and the trolley is started, causing the trolley to move along the track towards the kiln mouth. The moving support rod, actuator rod, and trapezoidal steel plate extend into the kiln until the trapezoidal angle of the steel plate contacts the surface of the ring. Utilizing the rotation of the rotary kiln, the ring and the trapezoidal steel plate move relative to each other. Simultaneously, the trapezoidal angle concentrates mechanical stress on the ring, breaking it up. Each breakage is controlled at a thickness of 100-150mm. After one forward breakage cycle, the trolley is slowly reversed. During this process, the trapezoidal steel plate again contacts the incompletely broken ring for secondary breakage. Once one ring at the kiln opening is cleared, the actuator rod, trapezoidal steel plate, and other components inserted into the kiln are cooled with water to reduce their temperature to room temperature. By repeating this reciprocating motion and observing the degree of ring breakage at the kiln opening, the ring clearing work is completed. Depending on production needs, this process is repeated 2-3 times per shift, with each cleaning session taking 5-10 minutes, ensuring that the ring at the kiln opening remains under control and maintaining normal ventilation and production rhythm in the rotary kiln.

[0008] The beneficial effects of this utility model are as follows: by using the directional movement of the trolley track and the coordination of the trapezoidal steel plate with the rotation of the rotary kiln itself, cleaning can be completed while the kiln is running by only appropriately reducing the kiln speed and the fan speed. Each cleaning takes only 5-10 minutes, and 2-3 cleanings per shift are sufficient to maintain the controlled state of the kiln mouth ring formation. This effectively avoids production interruptions caused by long-term kiln shutdowns, significantly improves the rotary kiln's operating rate, and reduces labor input by performing cleaning operations in a short time, further compressing labor costs.

[0009] Option 2, a preferred embodiment of the basic option, includes a base with a bracket detachably connected to it. The bracket has a U-shaped plate, and the inner four walls of the U-shaped plate are rotatably connected to roller strips. Each roller strip is in rolling connection with a support rod. The rolling connection between the roller strip and the support rod replaces the traditional sliding contact, converting sliding friction into rolling friction. This not only makes it easier and less strenuous for the trolley to move the support rod in and out of the kiln, but also reduces the wear and tear on the support rod and the support structure.

[0010] Option 3, which is a preferred option of Option 2, has several through holes 1 for bolting the bracket. The through holes 1 are evenly distributed from top to bottom. The bracket is fixed to the through holes 1 at different heights by bolts, which can realize the step adjustment of the support rod height and make the device meet the cleaning requirements of different kiln opening heights.

[0011] Option 4, a preferred embodiment of Option 3, involves bolting a square plate (first type) to the trolley. Two slide rails are fixedly connected to the square plate (first type). One end of the support rod is fixedly connected to a square plate (second type). The square plate (second type) has two sliding plates. Several through holes (second type) are provided on the slide rails for bolting the sliding plates. The distribution of the through holes (second type) is the same as that of the through holes (first type). This allows for height adjustment of the support rod, ensuring that the trapezoidal steel plate is aligned with the kiln opening.

[0012] Option 5, a preferred option of the basic option, has slots on the actuator corresponding to the number of trapezoidal steel plates. The trapezoidal steel plates are engaged with the slots, and the actuator is threaded with a sleeve for clamping the trapezoidal steel plates. The sleeve clamping structure allows the trapezoidal steel plates to be replaced individually, eliminating the need to replace the entire actuator due to local wear, thus significantly reducing the replacement cost of vulnerable parts.

[0013] Option 6, which is a preferred option of Option 5, has a limiting groove on one side of each trapezoidal steel plate, and one end of the sleeve extends into the limiting groove. When installing the trapezoidal steel plate, the cooperation between the limiting groove and the sleeve can play a positioning and guiding role, so that the trapezoidal steel plate can be quickly inserted into the accurate position of the strip groove without repeated adjustments to complete the positioning. Attached Figure Description

[0014] Figure 1 This is a perspective view of a zinc extraction rotary kiln inlet ring cleaning device according to this utility model; Figure 2 This is a perspective view of the support structure in a zinc extraction rotary kiln inlet ring cleaning device of this utility model; Figure 3 This is a schematic diagram of the connection between the actuator rod and the trapezoidal steel plate in a zinc extraction rotary kiln inlet ring cleaning device of this utility model. Detailed Implementation

[0015] The present invention will be further described in detail below through specific embodiments: The reference numerals in the accompanying drawings of the instruction manual include: 1. trolley; 2. track; 3. support rod; 4. actuator rod; 5. trapezoidal steel plate; 6. base; 7. bracket; 8. U-shaped plate; 9. roller strip; 10. through hole one; 11. square plate one; 12. slide rail; 13. square plate two; 14. sliding plate; 15. through hole two; 16. strip groove; 17. sleeve; 18. limiting groove.

[0016] like Figures 1 to 3 As shown: A device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln includes a trolley 1. A track 2 is laid at the bottom of the trolley 1 for the directional movement of its pulleys. A support rod 3 is detachably connected to one end of the trolley 1. An actuator 4 is flange-connected to one end of the support rod 3. Several trapezoidal steel plates 5 are detachably connected to one end of the actuator 4. The upper bottom of each trapezoidal steel plate 5 is connected to the actuator 4. The actuator 4 has slots 16 corresponding to the number of trapezoidal steel plates 5. The trapezoidal steel plates 5 engage with the slots 16. A sleeve 17 for clamping the trapezoidal steel plates 5 is threaded onto the actuator 4. A limiting groove 18 is provided on one side of each trapezoidal steel plate 5. One end of the sleeve 17 extends into the limiting groove 18. A support structure is provided at the bottom of the support rod 3. The structure includes a base 6, a bracket 7 detachably connected to the base 6, a U-shaped plate 8 on the bracket 7, and roller strips 9 rotatably connected to the four walls of the inner ring of the U-shaped plate 8. Each roller strip 9 is rotatably connected to the support rod 3. The base 6 has several through holes 10 for bolting the bracket 7. The through holes 10 are evenly distributed from top to bottom. A square plate 11 is bolted to the trolley 1. Two slide rails 12 are fixedly connected to the square plate 11. A square plate 2 13 is fixedly connected to one end of the support rod 3. Two slide plates 14 are provided on the square plate 2 13. Several through holes 2 15 for bolting the slide plates 14 are opened on the slide rails 12. The distribution of the through holes 2 15 is the same as the distribution of the through holes 10.

[0017] The implementation method of this embodiment is as follows: When it is necessary to clean the ring formation in the rotary kiln, first reduce the kiln speed from the normal production value by 2-3 Hz, and at the same time reduce the blower speed by 10 Hz, so that no ash is sprayed out of the kiln opening, to prevent the high-temperature dust in the kiln from overflowing and affecting the working environment and personnel safety.

[0018] Then, based on the height of the rotary kiln opening, adjust the installation position of the bracket 7 through the through hole 10 on the base 6 so that the roller strip 9 of the inner ring of the spiral plate 8 is fully in contact with the support rod 3; at the same time, adjust the connection position of the square plate 11 on the trolley 1 and the square plate 13 on the support rod 3, and fix the slide plate 14 through the through hole 15 on the slide rail 12 to ensure that the support rod 3 is horizontally aligned with the kiln opening; then raise the temperature of the ring-forming part of the kiln opening to above 600℃, then open one side of the rotary kiln door, start the trolley 1, and move the trolley 1 along the track 2 towards the kiln opening, driving the support rod 3, the actuator 4 and the trapezoidal steel plate 5 into the kiln. The process continues until the trapezoidal angle of the trapezoidal steel plate 5 contacts the surface of the ring. Utilizing the rotation of the rotary kiln, the ring and the trapezoidal steel plate 5 move relative to each other. Simultaneously, the trapezoidal angle concentrates mechanical stress on the ring, breaking it up. Each breakage is controlled at a thickness of 100-150mm. After one forward crushing operation, the trolley 1 is slowly reversed. During this process, the trapezoidal steel plate 5 again contacts the incompletely broken ring for secondary crushing. Once one ring at the kiln opening is cleared, the actuator rod 4, trapezoidal steel plate 5, and other components extending into the kiln are cooled with water to reduce their temperature to room temperature. By repeating the above reciprocating motion and observing the degree of ring breakage at the kiln opening, the ring clearing process is completed.

[0019] According to production needs, the above process is repeated 2-3 times per shift, with each cleaning taking 5-10 minutes, to ensure that the ring formation at the kiln opening is always under control and to maintain normal ventilation and production rhythm of the rotary kiln.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for cleaning rings at the kiln mouth of a zinc extraction rotary kiln, characterized in that, Includes a trolley (1), the bottom of which is laid with a track (2) for the trolley (1) to move in a directional manner via pulleys, a support rod (3) is detachably connected to one end of the trolley (1), an actuator rod (4) is flange-connected to one end of the support rod (3), a plurality of trapezoidal steel plates (5) are detachably connected to one end of the actuator rod (4), the upper bottom of the trapezoidal steel plates (5) is connected to the actuator rod (4), and a support structure is provided at the bottom of the support rod (3).

2. The zinc extraction rotary kiln inlet ring cleaning device according to claim 1, characterized in that, The support structure includes a base (6), on which a bracket (7) is detachably connected. A spiral plate (8) is provided on the bracket (7). Roller strips (9) are rotatably connected to the four inner walls of the spiral plate (8). Each roller strip (9) is rotatably connected to the support rod (3).

3. The zinc extraction rotary kiln inlet ring cleaning device according to claim 2, characterized in that, The base (6) has several through holes (10) for bolting the bracket (7), and the through holes (10) are evenly distributed from top to bottom.

4. The zinc extraction rotary kiln inlet ring cleaning device according to claim 3, characterized in that, The trolley (1) is bolted to a square plate (11), and two slide rails (12) are fixedly connected to the square plate (11). One end of the support rod (3) is fixedly connected to a square plate (13), and two slide plates (14) are provided on the square plate (13). Several through holes (15) for bolting the slide plates (14) are opened on the slide rails (12). The distribution of the through holes (15) is the same as that of the through holes (10).

5. The zinc extraction rotary kiln inlet ring cleaning device according to claim 1, characterized in that, The actuator (4) has a slot (16) corresponding to the number of trapezoidal steel plates (5). The trapezoidal steel plates (5) are engaged with the slot (16). The actuator (4) is threaded with a sleeve (17) for clamping the trapezoidal steel plates (5).

6. The zinc extraction rotary kiln inlet ring cleaning device according to claim 5, characterized in that, Each of the trapezoidal steel plates (5) has a limiting groove (18) on one side, and one end of the sleeve (17) extends into the limiting groove (18).

Images