Unshaped refractory material construction system for rotary kiln
By using a casting construction system of mobile mixing stations and conveyors in rotary kiln construction, the problem of environmental temperature affecting construction quality is solved, efficient construction in high-temperature environments is achieved, and construction efficiency and quality are improved.
Patent Information
- Application Number
- CN202421755154.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-24
AI Technical Summary
In rotary kiln construction, the ambient temperature adversely affects the construction time of amorphous refractory materials, resulting in a decrease in construction quality and low manual handling efficiency, increasing construction costs.
A casting construction system for rotary kilns is adopted, including a mobile mixing station and a conveyor. By setting up a stirring operation platform and a material storage mechanism on the rails, the stirring and rapid conveying of amorphous refractory materials are realized, reducing the time waiting for construction after stirring.
It effectively shortens the post-mixing transportation time of amorphous refractory materials, improves construction quality, especially in summer or high temperature environments, reduces material costs and improves construction efficiency.
Smart Images
Figure CN223005298U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of rotary kiln construction, and particularly relates to an amorphous refractory construction system for a rotary kiln. Background Technique
[0002] As a common thermal equipment, rotary kilns are widely used in various fields such as chemical industry, mining, metallurgy, cement and petroleum. The inner lining of the rotary kiln is mostly lined with shaped refractory bricks or amorphous refractories or a combination of the two; as one of the most commonly used methods, using amorphous refractories as the inner lining of the rotary kiln can effectively reduce the construction period, improve the integrity of the inner lining, facilitate later maintenance, save labor, etc. However, compared with using shaped refractories, amorphous refractories need to be stirred and transported before construction, and these links need to be controlled key points.
[0003] The currently common construction layout is that the mixer is placed at the kiln head. The amorphous refractory is dry-mixed and then added with appropriate water or liquid binder, stirred until it has appropriate fluidity and then discharged from the discharge port, and then transported manually into the rotary kiln with a length of more than 100 meters for construction; during construction, the amorphous refractory needs to still have appropriate fluidity for workability. When the workability is poor, the construction time will increase, the material will vibrate incompactly, honeycombing and pitting will occur, and even the material blocks cannot be fused, and the high-temperature mechanical properties will drop significantly, seriously affecting the service life of the refractory inner lining.
[0004] The best construction temperature of amorphous refractories is generally around 20°C. Many factories and mines build rotary kilns in areas with harsh environments, and the environmental temperature factor has a great influence on the construction quality of amorphous refractories; during summer construction, the environmental temperature can reach up to 37-38°C at the highest. At this time, some amorphous refractories will solidify quickly, and the workable time will be reduced to less than 15 minutes, which is not enough time to transport all the stirred amorphous refractories to the tail of the rotary kiln and complete the construction.
[0005] Manually transporting the stirred amorphous refractory is time-consuming and laborious. Taking a 110-meter-long rotary kiln as an example, the amount of amorphous refractory used for the rotary kiln cylinder is about 800 tons; if it is divided into 20 construction sections, the single-section consumption is as high as 40 tons. Currently, the most commonly used method is to transport the material by manual trolley. Due to the limited speed of manual trolley and the loading capacity per vehicle, many round trips are required. At the same time, the temperature inside the kiln is significantly higher than the environmental temperature due to direct sunlight, and even reaches 40°C, accelerating the solidification speed of the amorphous refractory during transportation and further shortening the workable time.
[0006] The above two problems together cause the shortening of the workable time of the amorphous refractory in the currently commonly used construction method, seriously affecting the construction quality of the amorphous refractory of the rotary kiln.
[0007] To solve this problem, generally, the addition amount of mixing water or liquid binder is appropriately increased. However, excessive addition will cause a decrease in the bulk density of the monolithic refractory, and even segregation may occur, which will also reduce the high-temperature mechanical properties. It is also possible to use raw materials with a higher alumina content or more efficient retarders in the production plan, but this will cause a significant increase in project costs. At present, when hot repairing the iron runner in the steel mill, a mobile mixer with a track is used to reduce the influence of the high-temperature environment. The mixing is carried out above the construction site, and there is no need for re-transportation after mixing. However, it needs to cooperate with the overhead crane for material hoisting and cannot be directly applied to the construction of a rotary kiln with a diameter of only 5m. Summary of the Invention
[0008] The utility model provides a construction system for monolithic refractory for rotary kilns, which significantly shortens the transportation time after mixing by changing the original mixing and transportation process, effectively reduces the adverse impact of the environmental temperature on the workable time, improves the construction quality of the monolithic refractory for rotary kilns, and particularly significantly improves the construction quality for summer construction or construction in the equatorial region.
[0009] To achieve the above object, the utility model adopts the following technical solutions:
[0010] A casting construction system for a rotary kiln, the construction system includes a conveyor for transporting the monolithic refractory to the rotary kiln and a mobile mixing station for mixing the monolithic refractory.
[0011] The conveyor has a vehicle frame located on the steel rail, and a storage mechanism is placed on the vehicle frame; the storage mechanism has an inclined bottom, and the lowest point is connected to a screw feeding mechanism; the front end of the screw feeding mechanism extends out of the vehicle frame; a limit switch is provided at the front end of the vehicle frame.
[0012] The described mobile mixing station has a mixing operation platform located on steel rails; a mixing tank is placed on the mixing operation platform; the mixing tank is located at the rear end of the mixing operation platform; the mixing tank has a structure with an open upper end; the mixing tank can mix 500 kg of unshaped refractory materials; at the open upper end position of the mixing tank, there is an opening and closing protective grid, which can prevent safety accidents when closed, and when opened, the dry materials and ingredients of the unshaped refractory materials are input by the screw feeding mechanism; the protective grid can also be partially opened to add mixing water or liquid binder; at the lower part of the rear lower side of the mixing tank, there is a discharge port; on one side of the mixing tank, there is a mixing control box, and the lower part is a mixing motor; the mixing control box controls the mixing blades in the mixing mechanism to mix the unshaped refractory materials through the mixing motor; when discharging is required after mixing, the discharge port can be opened, and the mixed unshaped refractory materials are discharged from the discharge port through the rotation of the mixing blades; at the front end of the mixing operation platform, there is a vehicle body operation platform; inside the vehicle body operation platform, there is a traveling control motor for controlling the movement of the mobile mixing station.
[0013] A brake Ⅰ is provided corresponding to the frame, and a brake Ⅱ is provided corresponding to the wheels of the mixing operation platform.
[0014] The construction method is to first transport the dry materials of the unshaped refractory materials or the unshaped refractory materials without adding hardening agents into the rotary kiln, place them in the mixing equipment, then add water for mixing or liquid binder, and then carry out mixing to make the unshaped refractory materials with construction performance, and then immediately carry out construction.
[0015] A pouring construction system for a rotary kiln proposed by the present utility model has the following advantages compared with the currently commonly used construction systems and construction methods: (1) It improves the applicability of materials during construction in summer or high-temperature environments, shortens the waiting time for the unshaped refractory materials after mixing for construction, and improves the construction quality; (2) It increases the scale of use of construction machinery, reduces labor costs, and improves construction efficiency; (3) It reduces the requirements of the unshaped refractory materials design for the constructible time and reduces material costs. Description of the Drawings
[0016] Figure 1 It is a schematic diagram of a mobile mixing station for rotary kiln construction
[0017] Figure 2 It is a schematic diagram of a conveyor for rotary kiln construction.
[0018] In the figure: 1, body operation platform; 2, driving control motor; 4, wheels; 5, mixing operation platform; 6, mixing motor; 7, brake II; 8, discharge opening; 9, mixing tank; 10, protective grid; 11, mixing controller; 12, seat; 13, driving controller; 14, wheels; 15, stopper; 16, screw conveyor mechanism; 17, storage mechanism; 18, conveyor controller; 19, driving controller; 20, seat; 21, brake I; 22, driving motor; 23, conveyor mechanism motor, 24, vehicle frame. Detailed implementation mode
[0019] The present utility model will be described in detail in combination with the accompanying drawings and specific embodiments:
[0020] As Figure 1 , Figure 2 shown, a pouring construction method and a construction system for a rotary kiln. The construction method is to first transport the unshaped refractory dry material or the unshaped refractory material without adding a hardening agent into the rotary kiln, place it in a mixing device, then add water for mixing or a liquid binder, and then perform mixing to obtain an unshaped refractory material with construction performance, and then immediately carry out construction; the construction system in the construction method includes a conveyor for transporting the unshaped refractory material to the rotary kiln and a mobile mixing station for mixing the unshaped refractory material.
[0021] The conveyor has a vehicle frame 24 located on a steel rail, and a storage mechanism 17 is placed on the vehicle frame 24; the storage mechanism 17 has an inclined bottom, and the lowest part is connected to the screw feeding mechanism 16; the front end of the screw feeding mechanism 16 extends out of the vehicle frame 25; a limit switch 15 is provided at the front end of the vehicle frame 24.
[0022] The described mobile mixing plant has a mixing operation platform 5 located on the steel rails; a mixing tank 9 is placed on the mixing operation platform 5; the mixing tank 9 is located at the rear end of the mixing operation platform 5; the mixing tank 8 has a structure with an open upper end; the mixing tank can mix 500 kg of unshaped refractory materials; a switchable protective grid 10 is provided at the open upper end position of the mixing tank. When the protective grid 10 is closed, safety accidents can be prevented. When it is opened, the dry materials and ingredients of the unshaped refractory materials are input by the screw feeding mechanism; the protective grid 10 can also be partially opened to add mixing water or liquid binder; a discharge port 8 is provided at the lower part of the rear lower side of the mixing tank 9; a mixing control box 11 is provided on one side of the mixing tank 9, and a mixing motor 6 is at the lower part; the mixing control box 11 controls the mixing blades in the mixing mechanism to mix the unshaped refractory materials through the mixing motor; when discharging is required after mixing, the discharge port 8 can be opened, and the mixed unshaped refractory materials are discharged from the discharge port by the rotation of the mixing blades; a vehicle body operation platform is placed at the front end of the mixing operation platform; a driving control motor for controlling the movement of the mobile mixing plant is arranged inside the vehicle body operation platform.
[0023] A brake Ⅰ 21 is provided corresponding to the frame, and a brake Ⅱ 7 is provided corresponding to the wheels of the mixing operation platform.
[0024] The specific usage method of the present utility model is as follows:
[0025] (1) Lay the steel rails;
[0026] (2) Place the mobile mixing plant for rotary kiln construction on the railway tracks from the kiln head, with the vehicle body operation platform 1 facing the kiln tail direction. The operator of the mixing plant operates the driving controller 13, starts the driving motor 2, drives the mobile mixing plant above the construction mold, stops, sets the brake 7 and opens the protective grid 10;
[0027] (3) Place the conveyor for rotary kiln construction on the railway tracks from the kiln head, with the direction of the positioner 15 facing the mobile mixing plant for rotary kiln construction;
[0028] (4) Load the dry materials of the unshaped refractory materials into the storage mechanism 17;
[0029] (5) The operator of the conveyor operates the driving controller 19, starts the driving motor 22 and drives forward. Stop after the positioner 15 contacts the mobile mixing plant, and set the brake 21 after stopping;
[0030] (6) The operator of the conveyor opens the mixing and conveying controller 18, conveys the dry materials of the unshaped refractory materials from the storage device 17 to the mixing mechanism 9 through the screw conveying mechanism, and closes the protective grid 10;
[0031] (7) The conveyor operator operates the travel controller 19, reverses to the kiln head, and reloads the material.
[0032] (8) The mixing plant operator turns on the mixing controller 11, starts mixing the unshaped refractory material. After mixing is completed, the discharge opening 8 is opened, and the mixed unshaped refractory material is discharged into the construction mold.
[0033] (9) The construction workers start construction and move the mixing plant forward to the next construction mold.
[0034] (10) Repeat steps (4) to (9) in a cycle until the construction of this process is completed.
Claims
1. A construction system of unshaped refractory materials for rotary kiln, characterized in that: The construction system includes a conveyor for conveying the monolithic refractory material to the rotary kiln and a mobile mixing station for mixing the monolithic refractory material; The conveyor has a frame located on a steel rail, a material storage mechanism is placed on the frame; the material storage mechanism has an inclined bottom, the lowest point of which is connected to a screw feeding mechanism; the front end of the screw feeding mechanism extends out of the frame; a limit switch is arranged at the front end of the frame; The mobile mixing station has a mixing operation platform located on the rails; a mixing box is placed on the mixing operation platform; the mixing box is located at the rear end of the mixing operation platform; the mixing box is a structure with an upper end opening; the mixing box can mix 500 kg of amorphous refractory materials; an openable and closable protective grid is provided at the upper opening of the mixing box, which can prevent safety accidents when closed, and when opened, the spiral feeding mechanism inputs dry materials and ingredients of amorphous refractory materials; the protective grid can also be partially opened to add blending water or liquid binder; a discharge port is provided at the lower rear part of the mixing box; a mixing control box is provided on one side of the mixing box, and a mixing motor is provided at the lower part; the mixing control box controls the mixing blades in the mixing mechanism through the mixing motor to mix the amorphous refractory materials; When the mixing is completed and the material needs to be discharged, the discharge port can be opened, and the mixed amorphous refractory material is discharged from the discharge port through the rotation of the mixing blades; a body operation platform is placed at the front end of the mixing operation platform; A travel control motor for controlling the movement of the mobile mixing station is arranged in the vehicle body operating platform.
2. The monolithic refractory material construction system for rotary kiln according to claim 1, characterized in that: A brake I is provided corresponding to the frame, and a brake II is provided corresponding to the wheels of the mixing operation platform.