Multi-grade limestone matching, homogenizing and conveying system

Abstract

The utility model discloses a multi-grade limestone matching, homogenizing and conveying system which comprises at least one high-grade discharging hopper, at least one low-grade discharging hopper, a roller screen, a crusher, a belt conveyor, a dust collector and a dust collecting fan, each high-grade discharging hopper and each low-grade discharging hopper are arranged to be capable of conveying materials to the feeding end of the roller screen through the conveying plate feeding machines in one-to-one correspondence, the fine material discharging end of the roller screen is arranged to feed the materials to the belt conveyor, and the coarse material discharging end of the roller screen is arranged to feed the materials to the feeding end of the crusher. The discharging end of the crusher is arranged to feed materials to the belt conveyor, and the dust collector is arranged to be capable of collecting material dust and discharging the material dust out of the system through the dust collecting fan. Wherein the conveying plate feeding machine and the horizontal plane are arranged at an angle of 10-25 degrees, and a plurality of baffles are detachably arranged at the position, located above the feeding port, of a shell on the conveying plate feeding machine and are arranged in the vertical direction. The homogenizing effect of the calcium raw material is improved, the raw material components are stabilized, and the clinker quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of cement production batching technology, specifically to a multi-grade limestone blending and homogenization conveying system. Background Technology

[0002] Currently, with the development of the cement industry and the increasing standardization and unification of cement production, cement companies are placing higher demands on production operations and clinker quality. Existing production lines primarily use four types of raw materials: calcareous, siliceous, aluminous, and ferrous. Among these, limestone, the most widely used and of the highest quality, is becoming increasingly scarce, and its abundance varies regionally. Therefore, it is necessary to use lower-grade calcareous limestone in the batching process. However, existing production processes cannot meet the requirements for blending and transporting limestone of varying grades. Simultaneous unloading of high- and low-grade limestone increases fluctuations in the composition of the calcareous raw materials, reduces clinker quality, and increases the difficulty of calcination.

[0003] Therefore, there is an urgent need to design a homogenization and conveying system suitable for multi-grade limestone to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of existing technologies that make it difficult to meet the requirements of blending and conveying high and low grade limestone, resulting in low clinker quality and high firing difficulty. This invention provides a multi-grade limestone blending and homogenization conveying system, which improves the homogenization effect of calcareous raw materials, stabilizes the raw material composition, and improves the quality of clinker.

[0005] To achieve the above objectives, this utility model provides a multi-grade limestone blending and homogenization conveying system. This system includes at least one high-grade limestone hopper, at least one low-grade limestone hopper, a limestone roller screen, a limestone crusher, a limestone belt conveyor, a dust collector, and a dust collection fan. Each high-grade and low-grade limestone hopper is configured to convey limestone to the feed end of the limestone roller screen via a corresponding limestone conveyor plate feeder. The fine material discharge end of the limestone roller screen is configured to feed material to the limestone belt conveyor, and the coarse material discharge end is configured to feed material to the feed end of the limestone crusher. The discharge end of the limestone crusher is configured to feed material to the limestone belt conveyor. The dust collector is configured to collect limestone dust and discharge it from the system via the dust collection fan.

[0006] The limestone conveyor plate feeder is set at an angle of 10°-25° to the horizontal plane. Furthermore, multiple baffles are detachably installed on the housing above the feed inlet of the limestone conveyor plate feeder, and the multiple baffles are arranged vertically.

[0007] Preferably, an angle steel is provided at the connection between the baffle and the limestone conveyor plate feeder housing.

[0008] Preferably, the multi-grade limestone homogenization and conveying system also includes an inspection and maintenance vehicle located at the top.

[0009] Preferably, the multi-grade limestone homogenization conveying system also includes a receiving hopper, which is located below all limestone conveyor plate feeders and is used to collect limestone spilled from the limestone conveyor plate feeders and convey it to the limestone belt conveyor.

[0010] Preferably, the discharge port of the limestone conveying plate feeder that is equipped with the high-grade limestone hopper is configured to feed material toward the limestone conveying plate feeder that is equipped with the low-grade limestone hopper, and the limestone conveying plate feeder that is equipped with the low-grade limestone hopper feeds material into the limestone roller screen.

[0011] Preferably, the screen body on the limestone roller screen is driven and connected to the hydraulic system of the limestone roller screen.

[0012] Preferably, the limestone roller screen is connected to the limestone crusher through a material channel, and vibrating motors are installed on both the outer wall of the limestone roller screen and the bottom wall of the material channel.

[0013] Preferably, the limestone crusher is driven and connected to the limestone crusher hydraulic system.

[0014] Preferably, the multi-grade limestone homogenization conveying system also includes a central control monitoring system, which is configured to control the start-up, shutdown, and frequency of each limestone conveyor feeder.

[0015] Preferably, the central control monitoring system also includes monitoring for detecting the material discharge status of each high-grade limestone hopper and each low-grade limestone hopper.

[0016] According to the above technical solution, the original single limestone discharge port is modified into a double discharge port to meet the simultaneous discharge of high and low grade limestone. The modified discharge port can accommodate the simultaneous discharge of materials of various grades in terms of spatial arrangement. Limestone conveyor plate feeders are installed below the limestone hoppers, which can be set to start and stop independently with adjustable frequency. The discharge ports of the double limestone hoppers are designed before the limestone crusher, allowing the limestone crusher to simultaneously achieve material mixing and homogenization during crushing. Compared with the traditional belt conveyor method, the composition fluctuation is smaller and the homogenization effect is better. Meanwhile, due to the poor continuity of unloading by the unloading vehicle and the large volume of material before crushing, it is easy to cause blockage and spillage problems in the downstream conveyor, and quantitative conveying cannot be achieved. This utility model adds a baffle design above the inlet of the limestone conveyor plate feeder to control the material thickness. The height of the baffle is adjustable, which can achieve stable quantitative conveying of materials and solve the problems of blockage and spillage in the downstream conveyor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-grade limestone homogenization and conveying system according to one embodiment of the present invention;

[0018] Figure 2 This is an installation cross-sectional view of the baffle installed on the limestone conveyor plate feeder according to one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the baffle installed on the limestone conveying plate feeder according to one embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of section A;

[0021] Figure 5 This is a feedback logic diagram of the CaO content in limestone after mixing.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-High-grade limestone feeder 2-Low-grade limestone feeder

[0024] 3-Limestone roller screen 4-Limestone crusher

[0025] 5- Limestone belt conveyor 6- Dust collector

[0026] 7-Dust collector fan 8-Limestone conveyor plate feeder

[0027] 9-Baffle 10-Angle steel

[0028] 11-Inspection and maintenance trolley 12-Receiving hopper

[0029] 13-Limestone roller screen hydraulic system 14-Material channel

[0030] 15-Vibrating motor; 16-Hydraulic system of limestone crusher

[0031] 17-Monitoring Detailed Implementation

[0032] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0033] In this utility model, unless otherwise stated, directional words such as "upper," "lower," "inner," "outer," "top," and "bottom" contained in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the terminology.

[0034] See Figures 1 to 5 This utility model provides a multi-grade limestone homogenization and conveying system. The system includes at least one high-grade limestone hopper 1, at least one low-grade limestone hopper 2, a limestone roller screen 3, a limestone crusher 4, a limestone belt conveyor 5, a dust collector 6, and a dust collection fan 7. Each high-grade limestone hopper 1 and each low-grade limestone hopper 2 is configured to convey limestone to the feed end of the limestone roller screen 3 via a corresponding limestone conveyor plate feeder 8. The fine material discharge end of the limestone roller screen 3 is configured to feed material to the limestone belt conveyor 5, and the coarse material discharge end is configured to feed material to the feed end of the limestone crusher 4. The discharge end of the limestone crusher 4 is configured to feed material to the limestone belt conveyor 5. The dust collector 6 is configured to collect limestone dust and discharge it from the system via the dust collection fan 7.

[0035] The limestone conveyor plate feeder 8 is set at an angle of 10°-25° to the horizontal plane, and multiple baffles 9 are detachably provided on the housing above the feed inlet of the limestone conveyor plate feeder 8. The multiple baffles 9 are arranged in a vertical direction.

[0036] The above technical solution transforms the original single limestone discharge port into a double discharge port to simultaneously discharge high- and low-grade limestone. The modified discharge port's spatial arrangement allows for the simultaneous discharge of materials of various grades. Limestone conveyor plate feeders are installed below the limestone hoppers, and can be individually controlled for start / stop with adjustable frequency. The discharge ports of the double limestone hoppers are designed before the limestone crusher, allowing for simultaneous material mixing and homogenization during crushing. Compared to traditional belt conveyor systems, this results in less compositional fluctuation and better homogenization. Furthermore, the poor continuity of unloading from the unloading vehicle and the large volume of uncrushed material easily lead to blockages and spillage at the rear conveyor, preventing quantitative conveying. This invention addresses this by adding a baffle above the limestone conveyor plate feeder inlet to control material thickness. The baffle's height is adjustable, enabling stable quantitative conveying and solving the problems of blockages and spillage at the rear conveyor.

[0037] In this embodiment, in order to improve the stability of the baffle 9 installed on the housing of the limestone conveyor plate feeder 8 and prevent it from easily changing position and losing its original material blocking effect due to external impact during use, it is preferable to provide an angle steel 10 at the connection between the baffle 9 and the housing of the limestone conveyor plate feeder 8. In this way, the angle steel 10 connects the baffle 9 and the housing of the limestone conveyor plate feeder 8, which acts as a reinforcing rib, pulling the two together and making the connection structure more compact and stable.

[0038] In this embodiment, since the various devices in the multi-grade limestone homogenization and conveying system are large in size and heavy in weight, manual handling is inconvenient and poses risks. To solve this problem and improve maintenance efficiency and construction safety, the multi-grade limestone homogenization and conveying system preferably includes a maintenance trolley 11 located at the top. The maintenance trolley 11 is used to lift the large and heavy devices one by one, so that maintenance workers can carry out maintenance work in a timely and efficient manner, ensuring smooth production.

[0039] In this embodiment, to prevent the raw materials on the limestone conveyor plate feeders 8 from spilling during the conveying process and causing unnecessary waste of production materials, the multi-grade limestone homogenization conveying system preferably also includes a receiving hopper 12. The receiving hopper 12 is located below all the limestone conveyor plate feeders 8 and is used to collect the limestone spilled from the limestone conveyor plate feeders 8 and convey it to the limestone belt conveyor 5. In this way, by collecting all the originally spilled limestone through the receiving hopper 12 and sending it to the limestone belt conveyor 5, raw material waste can be effectively avoided and production costs can be saved.

[0040] In one specific embodiment, in order to facilitate the mixing of high-grade limestone and low-grade limestone, extend the mixing time, and improve the homogenization effect, preferably, the discharge port of the limestone conveying plate feeder 8 that is matched with the high-grade limestone hopper 1 is configured to feed material onto the limestone conveying plate feeder 8 that is matched with the low-grade limestone hopper 2, and the limestone conveying plate feeder 8 that is matched with the low-grade limestone hopper 2 feeds material into the limestone roller screen 3.

[0041] In this embodiment, in order to facilitate the adjustment and driving of the screen body on the limestone roller screen 3 for screening operations, it is preferable to connect the screen body on the limestone roller screen 3 to the limestone roller screen hydraulic system 13 for driving.

[0042] Similarly, in order to facilitate the adjustment and driving of the limestone crusher 4 for crushing operations, it is preferable to connect the limestone crusher 4 to the limestone crusher hydraulic system 16 for phase drive.

[0043] During the process of limestone mixture entering the limestone roller screen 3 and then the limestone crusher 4, if limestone accumulates on the side wall, it will affect the normal conveying of subsequent limestone materials, and in severe cases, it will cause material blockage, greatly increasing the probability of failure. To solve the above problems, preferably, the limestone roller screen 3 and the limestone crusher 4 are connected by a material channel 14, and vibrating motors 15 are installed on both the outer wall of the limestone roller screen 3 and the bottom wall of the material channel 14. In this way, the vibration operation of the vibrating motors 15 can shake the limestone material accumulated on the side wall of the machine away from the machine, allowing for smooth material conveying and ensuring the normal progress of limestone mixing.

[0044] Furthermore, to enhance the intelligent control effect of the multi-grade limestone blending and homogenization conveying system, it is preferable that the system also includes a central control monitoring system. This system is configured to control the start / stop and frequency of at least each limestone conveyor plate feeder 8. Specifically, a raw material composition parameter feedback control program can be added to the DCS system to adjust the plate feeder frequency, effectively achieving real-time frequency changes, stabilizing material composition, and improving material homogenization. Control parameters include: the content of major components such as CaO in the blended limestone, and the ratio of high-grade and low-grade limestone; adjustment parameters include: the frequency of high-grade and low-grade limestone plate feeders, with an adjustment standard: the deviation of the content of major components such as CaO in limestone from the target parameter should be within 1%.

[0045] When using this multi-grade limestone with homogenization conveying system, in order to facilitate observation of the material discharge status of the hoppers and make timely adjustments or maintenance, the above-mentioned central control monitoring system preferably also includes a monitoring system 17 for detecting the material discharge status of each high-grade limestone hopper 1 and each low-grade limestone hopper 2.

[0046] The above-mentioned multi-grade limestone combined with a homogenization and conveying system can improve the homogenization effect of calcareous raw materials, reduce the fluctuation of raw material composition and clinker rate, and control the clinker rate to meet KH=0.900±0.02, SM=2.50±0.1, AM=1.50±0.1. At the same time, the system is suitable for production lines containing multiple types of materials to be combined with a discharge system, reducing the difficulty of production operation and the frequency of raw material composition detection. Its front-end homogenization can greatly reduce the homogenization load of the subsequent homogenization silo.

[0047] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A multi-grade limestone blending and homogenization conveying system, characterized in that, The multi-grade limestone homogenization and conveying system includes at least one high-grade limestone hopper (1), at least one low-grade limestone hopper (2), a limestone roller screen (3), a limestone crusher (4), a limestone belt conveyor (5), a dust collector (6), and a dust collection fan (7). Each high-grade limestone hopper (1) and each low-grade limestone hopper (2) is configured to convey limestone to the feed end of the limestone roller screen (3) via a corresponding limestone conveying plate feeder (8). The fine material discharge end of the limestone roller screen (3) is configured to feed material to the limestone belt conveyor (5), and the coarse material discharge end is configured to feed material to the feed end of the limestone crusher (4). The discharge end of the limestone crusher (4) is configured to feed material to the limestone belt conveyor (5). The dust collector (6) is configured to collect limestone dust and discharge it from the system via the dust collection fan (7). The limestone conveying plate feeder (8) is set at an angle of 10°-25° to the horizontal plane, and multiple baffles (9) are detachably provided on the housing above the feed inlet of the limestone conveying plate feeder (8), and the multiple baffles (9) are arranged in a vertical direction.

2. The multi-grade limestone blending and homogenization conveying system according to claim 1, characterized in that, An angle steel (10) is provided at the connection between the baffle (9) and the housing of the limestone conveying plate feeder (8).

3. The multi-grade limestone blending and homogenization conveying system according to claim 1, characterized in that, The multi-grade limestone homogenization and conveying system also includes an inspection and maintenance vehicle (11) located at the top.

4. The multi-grade limestone blending and homogenization conveying system according to claim 1, characterized in that, The multi-grade limestone homogenization conveying system also includes a receiving hopper (12), which is located below all limestone conveying plate feeders (8) and is used to collect limestone spilled from the limestone conveying plate feeders (8) and convey it to the limestone belt conveyor (5).

5. The multi-grade limestone blending and homogenization conveying system according to claim 1, characterized in that, The outlet of the limestone conveying plate feeder (8) that is used in conjunction with the high-grade limestone hopper (1) is configured to feed material onto the limestone conveying plate feeder (8) that is used in conjunction with the low-grade limestone hopper (2), and the limestone conveying plate feeder (8) that is used in conjunction with the low-grade limestone hopper (2) feeds material into the limestone roller screen (3).

6. The multi-grade limestone blending and homogenization conveying system according to claim 5, characterized in that, The screen body on the limestone roller screen (3) is driven and connected to the limestone roller screen hydraulic system (13).

7. The multi-grade limestone blending and homogenization conveying system according to claim 6, characterized in that, The limestone roller screen (3) is connected to the limestone crusher (4) through a material channel (14), and a vibrating motor (15) is provided on the outer wall of the limestone roller screen (3) and the bottom wall of the material channel (14).

8. The multi-grade limestone blending and homogenization conveying system according to claim 7, characterized in that, The limestone crusher (4) is driven and connected to the limestone crusher hydraulic system (16).

9. The multi-grade limestone blending and homogenization conveying system according to any one of claims 1-8, characterized in that, The multi-grade limestone homogenization conveying system also includes a central control monitoring system, which is configured to control the start-up, shutdown, and frequency of each limestone conveying plate feeder (8).

10. The multi-grade limestone blending and homogenization conveying system according to claim 9, characterized in that, The central control monitoring system also includes a monitoring (17) for detecting the feeding status of each of the high-grade limestone hoppers (1) and each of the low-grade limestone hoppers (2).

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