Anti-bonding vertical mill feeding scraper-trough conveyer
By adopting an anti-sticking vertical mill feed chute in cement production and utilizing the design of internal hot air and air cannons, the problem of blockage by high-moisture and high-viscosity materials has been solved, achieving stable equipment operation and reduced energy consumption.
Patent Information
- Application Number
- CN202422809726.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In cement production, high moisture and high viscosity feed materials can easily cause clogging of the feed chute, leading to downtime and increased energy consumption, which is difficult to solve effectively with existing technologies.
A non-sticking vertical mill feed chute is designed, which utilizes upward hot air from inside the mill to enter the chute through multiple air guides and contact the material. In conjunction with an air cannon to blow in the material, the risk of material sticking and clogging is reduced. Wear-resistant steel plates and a fully welded connection structure are adopted.
It effectively reduces the risk of material sticking and clogging in the mill feed chute, extends the operating time, and improves the stability and energy efficiency of the equipment.
Smart Images
Figure CN223616010U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cement production technology, and more specifically, to an anti-sticking feed chute for a vertical mill. Background Technology
[0002] Vertical mill systems for raw materials are commonly used in cement production. Due to the emphasis on cost reduction and efficiency improvement in cement production, tailings and waste materials are often added to the raw material batching process. These raw materials, such as coal gangue, coal slag, and silica tailings, have high moisture content, high viscosity, and poor flowability, posing a significant challenge to the feed chute of the vertical mill. In actual production, the outlet temperature is controlled at 60-65℃, and the overall moisture content of the raw materials entering the mill is controlled at 5.5%-6.5%. Existing feed chutes often fail and shut down within 6 hours of operation, increasing mill energy consumption and requiring on-site cleaning of the feed chutes to remove sticky materials. Utility Model Content
[0003] The purpose of this invention is to provide an anti-sticking vertical mill feed chute. With the help of upward hot air inside the mill (the feed air temperature can be maintained at 190-240℃), the air enters the mill chute directly from multiple air guides designed at the bottom of the feed chute and comes into contact with the feed material, participating in the drying of the material and effectively reducing the risk of material sticking and clogging in the feed chute.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an anti-adhesion vertical mill feed chute, comprising a mill and a feed chute, wherein the feed chute is inserted into the mill, and the inclination angle of the feed chute into the mill is greater than or equal to 60°; the feed chute also includes an external feed chute and an internal feed chute, wherein the external feed chute and the internal feed chute are welded together, the internal feed chute extends into the mill, and the external feed chute extends out of the mill; an air cannon is installed on the upper side of the external feed chute, and an air guide inlet is provided on the lower bottom surface of the internal feed chute; the air cannon is provided with two flat spray nozzles, and the width of the air guide inlet is 30-50mm.
[0005] Furthermore, the mill feed chute includes two sides and a bottom surface, all made of 8mm wear-resistant steel plate.
[0006] Furthermore, the two sides of the grinding chute are fully welded to both sides of the bottom surface.
[0007] Furthermore, there are at least three sets of air inlets.
[0008] The beneficial effects of this utility model are as follows: the feed chute is divided into sections, namely the external feed chute and the internal feed chute. An air cannon is installed on the upper side of the external feed chute, and several sets of guide air inlets are set on the lower bottom surface of the internal feed chute. The material is blown into the internal feed chute through the air cannon at the upper end of the external feed chute. Several sets of guide air inlets are set on the lower bottom surface of the internal feed chute. The upward hot air inside the mill (the feed air temperature can be maintained at 190-240℃) directly enters the inside of the feed chute from the multiple guide air inlets designed at the lower part of the feed chute and comes into contact with the feed material, participating in the drying of the material, effectively reducing the risk of material sticking and clogging in the feed chute. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the anti-adhesion vertical mill feed chute structure of this utility model;
[0010] Figure 2 This is a schematic diagram of the mill feed chute structure of this utility model;
[0011] Attached reference numerals: Air cannon-1, mill inlet chute-2, external mill chute-3, internal mill chute-4, guide air inlet-5. Detailed Implementation
[0012] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0013] like Figure 1-2 As shown, an anti-adhesion vertical mill feed chute includes a mill and a feed chute 2. The feed chute 2 is inserted into the mill, with an inclination angle greater than or equal to 60°. The feed chute 2 also includes an external feed 3 and an internal feed 4. The external feed 3 and the internal feed 4 are welded together. The internal feed 4 extends into the mill, while the external feed 3 extends out of the mill. An air cannon 1 is installed on the upper side of the external feed 3, and a guide air inlet 5 is provided on the lower bottom surface of the internal feed 4. The air cannon 1 has two flat nozzles, and the guide air inlet has a width of 30-50mm.
[0014] The mill feed chute 2 includes two sides and a bottom, all made of 8mm wear-resistant steel plate.
[0015] The two sides of the grinding chute 2 are fully welded to both sides of the bottom surface.
[0016] The air inlet 5 is at least three sets.
[0017] During actual installation, an air cannon 1 is installed at the top of the feed chute. The air cannon nozzles are two flat nozzles, each 100mm long and 25mm wide. The feed chute 2 is inserted into the mill at an angle greater than or equal to 60° (specifically, the angle between the feed chute and the horizontal plane). The external feed chute 3 and the internal feed chute 4 of the mill are required to be fully welded together. The width of the guide air inlet 5 is set at 30-50mm, and there are at least three sets. The two sides and the bottom of the feed chute are reinforced with wear-resistant plates, and the two sides are fully welded to both sides of the bottom.
[0018] In actual use: The material is blown into the inner chute of the mill through an air cannon at the upper end of the outer chute. Several sets of guide air inlets are set on the bottom surface of the inner chute. The upward hot air inside the mill (the temperature of the air entering the mill can be maintained at 190-240℃) enters the inner chute of the mill directly from the multiple guide air inlets designed at the bottom of the inner chute and comes into contact with the material entering the mill, participating in the drying of the material and effectively reducing the risk of material sticking and clogging in the inner chute.
[0019] Verification has shown that this new type of mill feed chute can effectively prevent material sticking when the overall moisture content of the feed material is between 4.5% and 7.0%. When the overall moisture content of the feed material is between 7.0% and 8.0%, it can operate stably for 36 hours, which is 7 times longer than the original mill feed chute (less than 6 hours) in terms of anti-clogging time.
Claims
1. A type of anti-sticking vertical mill feed chute, comprising a mill and a feed chute (2), characterized in that, The feed chute (2) is inserted into the mill, and the angle of inclination of the feed chute (2) into the mill is greater than or equal to 60°. The feed chute (2) also includes an external mill chute (3) and an internal mill chute (4). The external mill chute (3) and the internal mill chute (4) are welded together. The internal mill chute (4) extends into the mill, and the external mill chute (3) extends out of the mill. An air cannon (1) is installed on the upper side of the external mill chute (3), and a guide air inlet (5) is provided on the lower bottom surface of the internal mill chute (4). The air cannon (1) is provided with two flat spray nozzles, and the width of the guide air inlet is 30-50mm.
2. The anti-adhesion vertical mill feed chute according to claim 1, characterized in that, The grinding chute (2) includes two sides and a bottom, all made of 8mm wear-resistant steel plate.
3. The anti-adhesion vertical mill feed chute according to claim 2, characterized in that, The two sides of the grinding chute (2) are fully welded to the two sides of the bottom surface.
4. The anti-adhesion vertical mill feed chute according to claim 1, characterized in that, The air inlet (5) is at least three sets.