A rotary kiln steel slag adding device for producing cement clinker by using steel slag
Patent Information
- Application Number
- CN202522454008.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-19
AI Technical Summary
[0003]本实用新型的目的在于提供一种利用钢渣生产水泥熟料的回转窑钢渣添加装置，通过设置回转窑主体、输送仓、支撑座和进料仓，解决了回转窑钢渣添加装置在多种原料（特别是钢渣）入窑前混合不均，且回转窑与固定进料装置之间的动态密封不够好的问题
本实用新型通过设置输送仓和进料仓，解决了回转窑钢渣添加装置在多种原料（特别是钢渣）入窑前混合不均的问题，首先将安装环对准输送粉碎钢渣、石灰石、黏土等原料的设备输出端时，将钢渣、石灰石、黏土等原料输送到进料仓中，再通过集中斗集中后，启动驱动电机，驱动电机驱动减速机工作，驱动转轴转动带动螺旋叶片转动，使得进料仓中的物料被上下翻动混合均匀，混合均匀后，打开电控阀，集中斗中的物料输出到中转管中，落到输送仓中，使得回转窑钢渣添加装置在多种原料（特别是钢渣）入窑前混合更加均匀。
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Figure CN224920879U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cement production technology, and in particular relates to a rotary kiln steel slag addition device for producing cement clinker using steel slag. Background Technology
[0002] In the process of producing cement clinker using steel slag in a rotary kiln, secondary firing is usually not required. The steel slag is not re-calcined separately, but rather used as a raw material component in the raw meal formula, mixed and ground together with limestone, clay, and other materials. Subsequently, this mixed raw meal undergoes a complete high-temperature firing process in the cement kiln system, including preheating, decomposition, and sintering at approximately 1450°C to form clinker minerals. The role of steel slag in this process is mainly to provide effective components such as iron and calcium, and to participate in new chemical reactions to produce clinker. However, the rotary kiln steel slag addition device still has the following drawbacks in actual use: In the cement production process, the uniform mixing of raw materials (such as limestone, clay, steel slag, etc.) is crucial and directly affects the quality and performance of the final clinker. If components such as steel slag are not mixed evenly with other raw materials, it will lead to problems such as unstable reaction in the rotary kiln, large fluctuations in clinker composition, and substandard quality. Rotary kilns need to rotate continuously during production to tumble and transport materials, while the feeding device connected to them is fixed. In traditional connections, gaps are very likely to appear at the interface between the rotating and fixed parts, leading to two problems: first, high-temperature gases and dust inside the kiln leak out, causing energy loss and environmental pollution; second, cold air from outside is drawn in, lowering the temperature inside the kiln and increasing energy consumption. Utility Model Content
[0003] The purpose of this utility model is to provide a rotary kiln steel slag addition device for producing cement clinker using steel slag. By setting up a rotary kiln body, conveying bin, support base and feeding bin, it solves the problems of uneven mixing of various raw materials (especially steel slag) before entering the kiln and insufficient dynamic sealing between the rotary kiln and the fixed feeding device.
[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a rotary kiln steel slag addition device for producing cement clinker using steel slag. It includes a rotary kiln body, a conveying bin, a support base, and a feeding bin. The conveying bin is located at one end of the rotary kiln body. A transfer pipe is fixedly connected to the upper periphery of the conveying bin. A collection hopper is fixedly connected to the top of the transfer pipe. A feeding bin is fixedly connected to the top of the collection hopper. Feed pipes are fixedly connected to the top of the feeding bin in a circular array. A rotating shaft is vertically and movably connected to the center of the top of the feeding bin, extending downwards into the lower part of the collection hopper. A support base is fixed to the lower periphery of the conveying bin. The conveying bin is connected to one end of the rotary kiln body. The upper part of the conveying bin is connected to the collection hopper via the transfer pipe. The top of the collection hopper is connected to the feeding bin. Multiple feed pipes are arranged in a circular pattern on the top of the feeding bin for adding raw materials such as cement meal. A rotating shaft is located in the center of the feeding bin, extending to the lower part of the collection hopper. The lower part of the conveying bin is fixed by the support base, allowing the entire structure to be arranged at an angle, facilitating material conveying and heating treatment.
[0005] Furthermore, a movable ring is fixed at one end of the rotary kiln body near the conveying chamber, and a sealing ring is fixed at one end of the conveying chamber near the rotary kiln body. The inner ring of the sealing ring has a movable groove, and the movable ring is movably connected in the movable groove. A movable ring and a sealing ring are provided at the connection between the rotary kiln body and the conveying chamber. The sealing ring has a movable groove, and the movable ring is embedded in it. This structure realizes dynamic sealing between the rotary kiln and the fixed conveying chamber during operation, preventing material leakage and maintaining system airtightness.
[0006] Furthermore, a guide platform with an inclined top is fixed to the lower inner side of the conveying chamber. The inner diameter of the conveying chamber is equal to the inner diameter of the rotary kiln body and the moving ring. An electrically controlled valve is fixed to the periphery of the transfer pipe. The inclined guide platform inside the lower part of the conveying chamber guides the material smoothly into the rotary kiln. The inner diameters of the conveying chamber, the rotary kiln, and the moving ring are consistent to ensure smooth material flow. An electrically controlled valve is installed on the transfer pipe to control the start and stop of material conveying.
[0007] Furthermore, both ends of the support base are fixed with mounting strips, and the mounting strips have vertically through and symmetrically opened mounting holes. The support base is provided with mounting strips with mounting holes at both ends, and the support base is fixed to the working base surface by bolts or rivets to ensure stable operation of the equipment.
[0008] Furthermore, a speed reducer is fixed at the top center of the feed hopper, and a drive motor is fixed at the top of the speed reducer. The output end of the drive motor is fixed to the input end of the speed reducer. The drive motor and speed reducer are installed at the top center of the feed hopper. The output shaft of the motor is connected to the input end of the speed reducer. The speed and torque are adjusted by the speed reducer to drive the rotating shaft to rotate.
[0009] Furthermore, the output end of the reducer is fixed to the top of the rotating shaft, and a spiral blade is fixed to the lower part of the circumference of the rotating shaft. The spiral blade is set in the lower part of the feed hopper. The output end of the reducer is connected to the top of the rotating shaft, and the spiral blade is installed in the lower part of the rotating shaft and located in the feed hopper. When the rotating shaft rotates, the spiral blade stirs and mixes the material in the hopper to ensure that the raw materials are uniform.
[0010] Furthermore, each of the feed pipes is fixed with an installation ring on its top periphery. The feed pipes are located at the top of the feed hopper outside the reducer. Each feed pipe has an installation ring at its top for connecting to external feeding equipment. The installation ring is fixed to the feeding equipment with bolts to achieve stable delivery of raw materials such as steel slag and limestone to the feed hopper.
[0011] This utility model has the following beneficial effects: This invention solves the problem of uneven mixing of various raw materials (especially steel slag) before entering the rotary kiln by setting up a conveying bin and a feeding bin. First, when the installation ring is aligned with the output end of the equipment that conveys crushed steel slag, limestone, clay and other raw materials, the raw materials are conveyed into the feeding bin. After being collected by the collection hopper, the drive motor is started. The drive motor drives the reducer to work, and the drive shaft rotates, which drives the spiral blades to rotate. This makes the material in the feeding bin tumble and mix evenly. After being mixed evenly, the electric control valve is opened, and the material in the collection hopper is output into the transfer pipe and falls into the conveying bin, making the mixing of various raw materials (especially steel slag) more uniform before entering the rotary kiln by the steel slag adding device.
[0012] This invention solves the problem of insufficient dynamic sealing between the rotary kiln and the fixed feeding device during the operation of the rotary kiln steel slag adding device by setting up a rotary kiln body, a conveying bin, and a support base. After mixing in the central conveying hopper of the transfer pipe, the cement raw material is conveyed to the conveying bin, and then conveyed to the rotary kiln body through the guide platform, ready for calcination. At the same time, the heat generated during the calcination of the rotary kiln rises to the conveying bin to heat the cement raw material. The movable ring is movably connected to the movable groove in the sealing ring, and the movable ring is movably connected to the movable groove, which ensures the dynamic seal between the rotary kiln body and the conveying bin, reduces heat loss caused by poor sealing, and saves energy. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1A three-dimensional view of the assembly structure of a rotary kiln steel slag addition device for producing cement clinker using steel slag; Figure 2 This is a three-dimensional structural view of the main body of the rotary kiln; Figure 3 This is a three-dimensional view of the structure of the conveyor compartment after it has been partially cut open. Figure 4 This is a three-dimensional structural diagram of the support base; Figure 5 This is a three-dimensional view of the feed hopper section after it has been cut open.
[0015] Figure label: 1. Rotary kiln body; 101. Movable ring; 2. Conveying bin; 201. Transfer pipe; 202. Electrically controlled valve; 203. Guide platform; 204. Sealing ring; 205. Movable groove; 3. Support base; 301. Mounting strip; 302. Mounting hole; 4. Feed bin; 401. Rotating shaft; 402. Reducer; 403. Drive motor; 404. Spiral blade; 405. Concentrated hopper; 406. Feed pipe; 407. Mounting ring. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1
[0017] Please see Figure 1-4This utility model relates to a rotary kiln steel slag addition device for producing cement clinker using steel slag. It includes a rotary kiln body 1, a conveying bin 2, a support base 3, and a feeding bin 4. The conveying bin 2 is located at one end of the rotary kiln body 1. During operation, the rotary kiln body 1 heats the raw materials entering it, causing the raw meal to be heated and forming clinker. The conveying bin 2 transfers the cement raw meal mixture to be heated. A transfer pipe 201 is fixedly connected to the upper periphery of the conveying bin 2, transferring the material in the conveying bin 2. A centralized hopper 405 is fixedly connected to the top of the transfer pipe 201, and the centralized hopper 405 centrally holds the material concentrated in the feeding bin 4. The top of the centralized hopper 405 is fixedly connected to the feed bin 4, which conveys the raw material components of cement raw meal, including crushed steel slag. The top of the feed bin 4 is fixedly connected to the feed pipe 406 in a ring array. The feed pipe 406 transfers the cement raw meal material to the feed bin 4. The top center of the feed bin 4 is vertically connected to the rotating shaft 401, which extends downward into the lower part of the centralized hopper 405. When the rotating shaft 401 rotates, it drives the spiral blade 404 to rotate. The lower part of the periphery of the conveying bin 2 is fixedly connected to the support seat 3. The support seat 3 tilts the conveying bin 2 so that the material can flow to the rotary kiln body 1 by gravity.
[0018] Specifically, a movable ring 101 is fixed at one end of the rotary kiln body 1 near the conveying chamber 2, and a sealing ring 204 is fixed at one end of the conveying chamber 2 near the rotary kiln body 1. The inner ring of the sealing ring 204 has a movable groove 205, and the movable ring 101 is movably connected in the movable groove 205. The movable ring 101 on the rotary kiln body 1 is movably connected in the movable groove 205 on the sealing ring 204 at the end of the conveying chamber 2, so that the gap between the rotary kiln body 1 and the conveying chamber 2 is dynamically sealed during rotation.
[0019] Furthermore, a guide platform 203 with an inclined top is fixed to the lower inner side of the conveying chamber 2. The inner circle of the conveying chamber 2 has the same diameter as the inner circle of the rotary kiln body 1 and the movable ring 101. An electric control valve 202 is fixed to the periphery of the transfer pipe 201. The guide platform 203 in the lower inner part of the conveying chamber 2 guides the material entering the conveying chamber 2 into the rotary kiln body 1. The electric control valve 202 controls the conveying on and off of the transfer pipe 201.
[0020] Furthermore, both ends of the support base 3 are fixed with mounting strips 301. The mounting strips 301 are vertically and symmetrically provided with mounting holes 302. The support base 3 is movably connected to the mounting bolts or rivets through the mounting holes 302 on the mounting strips 301, and the support base 3 is installed on the mounting structure by the mounting bolts or rivets.
[0021] The operation process of this embodiment is as follows: During operation, after the conveying chamber 2 is supported and set on the working plane, the rivets or bolts for installation are inserted into the two mounting holes 302 on the mounting strip 301 and installed on the mounting position on the workbench to complete the installation operation. The cement raw material mixed in the conveying hopper 405 in the transfer pipe 201 is conveyed to the conveying chamber 2, and then conveyed to the rotary kiln body 1 through the guide table 203 to prepare for calcination. At the same time, the heat generated during the calcination of the rotary kiln rises to the conveying chamber 2 to heat the cement raw material. The movable ring 101 is movably connected to the movable groove 205 in the sealing ring 204. The movable connection between the movable ring 101 and the movable groove 205 ensures the dynamic seal between the rotary kiln body 1 and the conveying chamber 2. Specific Implementation Example 2
[0022] Please see Figure 1 , 3 5. Based on the first specific embodiment, a reducer 402 is fixed at the top center of the feed hopper 4, and a drive motor 403 is fixed at the top of the reducer 402. The output end of the drive motor 403 is fixed to the input end of the reducer 402. The reducer 402 is driven to work by the drive motor 403. After changing the torque at the output end, the rotating shaft 401 is driven to rotate.
[0023] Specifically, the output end of the reducer 402 is fixed to the top of the rotating shaft 401, and a spiral blade 404 is fixed to the lower part of the circumference of the rotating shaft 401. The spiral blade 404 is located in the lower part of the feed hopper 4. As the rotating shaft 401 rotates, the spiral blade 404 agitates and mixes the cement raw materials in the feed hopper 4. The drive motor 403 controls the speed within the range of 20-60 rpm through the reducer 402. Under this speed and structural parameters, the spiral blade 404 can effectively shear, lift, and diffuse materials with large differences in density and particle size, such as steel slag, limestone, and clay, ensuring that the materials are fully and uniformly mixed within 1-3 minutes.
[0024] Furthermore, each feed pipe 406 is fixed with an installation ring 407 on its top periphery. The feed pipe 406 is located at the top of the feed hopper 4 outside the reducer 402. After the installation ring 407 is connected to the outlet of the external feeding equipment, the installation bolts are inserted into the installation ring 407 and then screwed into the equipment for conveying raw materials, conveying raw materials such as steel slag, limestone, and clay into the feed hopper 4.
[0025] The operation process of this embodiment is as follows: During operation, when the mounting ring 407 is aligned with the output end of the equipment for conveying crushed steel slag, limestone, clay and other raw materials, the raw materials such as steel slag, limestone, clay and other raw materials are conveyed into the feed hopper 4. After being concentrated by the collection hopper 405, the drive motor 403 is started. The drive motor 403 drives the rotating shaft 401 to rotate through the reducer 402, which in turn drives the spiral blade 404 to rotate, so that the material in the feed hopper 4 is turned up and down and mixed evenly. After being mixed evenly, the electric control valve 202 is opened, and the material in the collection hopper 405 is output into the transfer pipe 201 and falls into the conveying hopper 2.
[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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.
[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A rotary kiln steel slag addition device for producing cement clinker using steel slag, comprising a rotary kiln body (1), a conveying bin (2), a support base (3), and a feeding bin (4), characterized in that: One end of the rotary kiln body (1) is provided with a conveying bin (2). The upper part of the periphery of the conveying bin (2) is fixedly connected to a transfer pipe (201). The top of the transfer pipe (201) is fixedly connected to a concentrator (405). The top of the concentrator (405) is fixedly connected to a feed bin (4). The top of the feed bin (4) is fixedly connected to a feed pipe (406) in a ring array. The center of the top of the feed bin (4) is vertically connected to a rotating shaft (401). The rotating shaft (401) extends downward into the lower part of the concentrator (405). The lower part of the periphery of the conveying bin (2) is fixedly provided with a support base (3).
2. The rotary kiln steel slag addition device for producing cement clinker using steel slag according to claim 1, characterized in that: A movable ring (101) is fixed at one end of the rotary kiln body (1) near the conveying chamber (2), and a sealing ring (204) is fixed at one end of the conveying chamber (2) near the rotary kiln body (1). A movable groove (205) is opened in the inner ring of the sealing ring (204), and the movable ring (101) is movably connected in the movable groove (205).
3. The rotary kiln steel slag addition device for producing cement clinker using steel slag according to claim 1, characterized in that: The lower inner side of the conveying chamber (2) is fixed with a guide platform (203) with an inclined top. The inner circle of the conveying chamber (2) has the same diameter as the inner circle of the rotary kiln body (1) and the movable ring (101). The circumference of the transfer pipe (201) is fixed with an electric control valve (202).
4. The rotary kiln steel slag addition device for producing cement clinker using steel slag according to claim 1, characterized in that: Both ends of the support base (3) are fixed with mounting strips (301), and mounting holes (302) are vertically and symmetrically opened in the mounting strips (301).
5. A rotary kiln steel slag additive device for producing cement clinker using steel slag according to claim 1, characterized in that: A speed reducer (402) is fixed at the top center of the feed hopper (4), and a drive motor (403) is fixed at the top of the speed reducer (402). The output end of the drive motor (403) is fixed to the input end of the speed reducer (402).
6. A rotary kiln steel slag additive device for producing cement clinker using steel slag according to claim 5, characterized in that: The output end of the reducer (402) is fixed to the top of the rotating shaft (401), and a spiral blade (404) is fixed to the lower part of the circumference of the rotating shaft (401). The spiral blade (404) is arranged in the lower part of the feed hopper (4).
7. A rotary kiln steel slag addition device for producing cement clinker using steel slag according to claim 1, characterized in that: Each of the feed pipes (406) has a mounting ring (407) fixed on its top periphery. The feed pipes (406) are located at the top of the feed hopper (4) outside the reducer (402).