High-efficiency ball mill device for cement clinker grinding

Abstract

The utility model relates to cement production and processing equipment technical field discloses high -efficient ball mill device of cement clinker grinding, including underframe no.

Description

Technical Field

[0001] This utility model relates to the field of cement production and processing equipment technology, and in particular to a high-efficiency ball mill device for grinding cement clinker. Background Technology

[0002] In the grinding and processing of cement clinker, the grinding media inside the ball mill mainly rely on the high-frequency impact and grinding of the material. During the physical grinding process, a large amount of mechanical energy is converted into heat energy, which causes the temperature inside the grinding chamber and on the surface of the grinding chamber cylinder to rise continuously.

[0003] Excessive temperature inside the grinding chamber can cause electrostatic adsorption between cement clinker particles, leading to agglomeration. It can even cause powder to adhere to the surface of the grinding steel balls, forming a ball-coating phenomenon. This ball-coating phenomenon prevents direct contact between the steel balls and the material, significantly reducing the impact crushing ability and grinding efficiency of the steel balls. At the same time, the continuous high temperature environment can also cause the gypsum added to the cement clinker to dehydrate, affecting the setting time and quality stability of the final cement product.

[0004] Existing ball mill cooling devices mostly use the method of directly spraying cooling water onto the outer wall of the grinding chamber for heat dissipation. However, since the outer wall of the grinding chamber is mostly a smooth cylindrical structure and the grinding chamber is in a continuous rotating state, the cooling water sprayed on the outer wall of the grinding chamber will be quickly lost or directly thrown off under the action of centrifugal force and gravity. This results in a short adhesion time of the cooling water on the high-temperature cylinder wall and a limited flow path, making it difficult to carry out sufficient heat exchange, which seriously limits the improvement of the production efficiency of cement clinker grinding equipment.

[0005] Therefore, this utility model proposes a high-efficiency ball mill device for grinding cement clinker to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in cement clinker grinding equipment, such as the smooth outer wall of the grinding chamber leading to short cooling water residence time, low heat dissipation efficiency, and easy clogging of the feed, this utility model aims to provide a high-efficiency ball mill device for cement clinker grinding with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a high-efficiency ball mill for grinding cement clinker, including: a base frame 1, a base frame 2, a bearing seat, a grinding chamber, a drive motor, a speed change driver and a drive gear, as well as a flow guide rib, a feed chamber, a feed motor, a propeller blade, a support, a transmission pipe, a water supply connector and a nozzle.

[0008] The flow guiding reinforcing ribs are fixedly welded to the outer surface of the grinding chamber along the spiral direction. The feeding chamber is fixedly connected to the top of the second base frame and connected to the right feeding end of the grinding chamber. The feeding motor is fixedly installed on the right side of the feeding chamber. The propeller blade is fixedly connected to the output shaft of the feeding motor and passes through the inside of the feeding chamber. The bracket is fixedly connected to the top of the first and second base frames. The transmission pipe is fixedly connected to the bracket. The water supply connector is connected to the right inlet and outlet of the transmission pipe. The nozzles are fixedly connected to the side of the transmission pipe facing the grinding chamber at equal intervals along the length direction.

[0009] Furthermore, base frame one and base frame two are fixed in parallel to each other, and the grinding chamber is rotatably connected to base frame one and base frame two through bearing seats. The drive motor is fixedly installed on the right side of base frame one, and the output shaft of the drive motor is connected to the speed change drive. The left end of the grinding chamber is fixedly connected to a drive gear that is in transmission cooperation with the speed change drive.

[0010] Preferably, the left and right ends of the grinding chamber are rotatably mounted on the top center of the first and second base frames via bearing seats, and the grinding chamber can rotate around the horizontal axis under the drive of the drive motor.

[0011] Preferably, the flow-guiding reinforcing ribs are continuously spirally wound and welded to the outer circumferential cylindrical wall of the grinding chamber. The flow-guiding reinforcing ribs are used to enhance the rigidity of the grinding chamber cylinder and guide the cooling water sprayed from the nozzle.

[0012] Preferably, the drive motor is fixedly mounted on the support platform extending from the right side of the base frame by bolts, and the speed change drive is located between the drive motor and the grinding chamber and fixedly mounted on the top of the base frame.

[0013] Preferably, the drive gear is coaxially fixedly sleeved on the outer periphery of the left end of the grinding chamber, and the output end of the speed change drive is provided with a small gear that meshes with the drive gear, thereby driving the grinding chamber to rotate.

[0014] Preferably, the feed hopper has a funnel-shaped structure, with the bottom outlet of the feed hopper connected to the central feed inlet on the right side of the grinding chamber, and the propeller blade located in the conveying channel at the bottom of the feed hopper.

[0015] Preferably, the feed motor is fixedly connected to the shaft of the propeller blade via a reducer, and the feed motor drives the propeller blade to rotate so as to force the cement clinker into the interior of the grinding chamber.

[0016] Preferably, the number of brackets is two pairs and they are in a gate-shaped structure. The two pairs of brackets span the upper right end of the drive gear and the grinding chamber, respectively, and the bottom of the brackets are welded and fixed to the base frame one and the base frame two.

[0017] Preferably, the transmission pipe is horizontally installed between the tops of two pairs of supports, with the transmission pipe located directly above the grinding chamber, and the transmission pipe is connected to an external water supply device through a water supply connector.

[0018] Preferably, multiple nozzles are evenly distributed on the lower surface of the transmission pipe, and the spray direction of the nozzles is perpendicular to the outer wall of the grinding chamber and the spiral groove area between the guide reinforcement ribs.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model solves the problem of poor cooling effect caused by short residence time and rapid loss of external spray cooling water on the smooth cylinder wall in existing ball mill devices by welding spiral-shaped flow guiding ribs to the outer wall of the grinding chamber and cooperating with the spray assembly above. It achieves the goal of using the spiral structure to guide the water flow to extend the adhesion path and time on the high-temperature cylinder wall, thereby significantly improving the heat exchange efficiency, effectively reducing the grinding temperature and playing an auxiliary role in dust reduction. At the same time, the flow guiding ribs also enhance the overall rigidity of the cylinder.

[0021] 2. This utility model solves the problem of low production efficiency caused by material accumulation and incomplete feeding during the feeding process of cement clinker by setting a propeller blade driven by an independent feeding motor in the feeding hopper for forced feeding. It achieves the effect of continuously, evenly and forcibly pushing clinker into the grinding hopper, ensuring the continuity and stability of equipment operation, thereby effectively improving the overall efficiency of cement clinker grinding operation. Attached Figure Description

[0022] Figure 1 A perspective view of the high-efficiency ball mill device for grinding cement clinker proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the variable speed drive in the high-efficiency ball mill device for grinding cement clinker proposed in this utility model.

[0024] Figure 3 This is a split view of the feed hopper in the high-efficiency ball mill device for grinding cement clinker proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the transmission pipe in the high-efficiency ball mill device for grinding cement clinker proposed in this utility model.

[0026] Legend:

[0027] 1. Base frame one; 2. Base frame two; 3. Bearing housing; 4. Grinding chamber; 5. Flow guide reinforcing rib; 6. Drive motor; 7. Speed ​​change driver; 8. Drive gear; 9. Feeding chamber; 10. Feeding motor; 11. Propeller blade; 12. Support; 13. Transmission pipe; 14. Water supply connector; 15. Nozzle. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a high-efficiency ball mill for grinding cement clinker, aiming to solve the technical problems of easy clogging of the feed and low heat dissipation efficiency during the grinding process in existing cement clinker ball mills, which leads to overheating of the equipment.

[0031] Please refer to Figure 1 The main support structure of the high-efficiency ball mill for cement clinker grinding includes a base frame 1 and a base frame 2. Base frames 1 and 2 are parallel to each other and stably fixed to the ground, forming the installation foundation for the high-efficiency ball mill. Bearing seats 3 are bolted to the center of the top of each of the base frames 1 and 2. The grinding chamber 4 is rotatably connected to the bearing seats 3 via journals at both ends, allowing the grinding chamber 4 to be stably mounted between base frames 1 and 2 and rotate around a horizontal axis. In the grinding chamber 4, which serves as the main working cavity, grinding steel balls are filled inside to impact and grind the materials. In order to improve the structural strength of the grinding chamber 4 and optimize the heat exchange efficiency of the subsequent cooling process, a flow guiding rib 5 is fixedly welded to the outer circumferential surface of the grinding chamber 4 in a spiral direction. The flow guiding rib 5 is tightly wrapped around the outer wall of the grinding chamber 4 in a continuous spiral shape. The flow guiding rib 5 can not only effectively enhance the rigidity of the grinding chamber 4 to prevent deformation under heavy load, but also form a spiral flow guiding channel during the rotation of the grinding chamber 4.

[0032] To achieve efficient rotation of the grinding chamber 4 and ensure stable power transmission, please refer to... Figure 1 and Figure 2A drive motor 6 is bolted to the right platform of the base frame 1. The drive motor 6 serves as the main power source for the high-efficiency ball mill. The output shaft of the drive motor 6 is connected to the input end of the speed change driver 7 via a coupling. The speed change driver 7 is fixedly installed on the top surface of the base frame 1 and located between the drive motor 6 and the grinding chamber 4. The speed change driver 7 is used to adjust the output speed and torque to meet the needs of different working conditions. A large-diameter drive gear 8 is coaxially fixed on the outer periphery of the left end of the grinding chamber 4. The output end of the speed change driver 7 is provided with a small gear structure that meshes with the drive gear 8. After the drive motor 6 starts, it drives the drive gear 8 to rotate through the speed change driver 7. Since the drive gear 8 is fixed on the grinding chamber 4, it drives the grinding chamber 4 to rotate continuously and stably around the axis of the bearing seat 3.

[0033] Meanwhile, to address the issues of low efficiency and clogging inherent in traditional feeding methods, please refer to... Figure 1 and Figure 3 The top surface of the base frame 2 is bolted to a feed hopper 9. The feed hopper 9 has a funnel-shaped structure. The bottom outlet of the feed hopper 9 extends and connects to the central feed inlet on the right side of the grinding chamber 4. A feed motor 10 is bolted to the outer wall of the right side of the feed hopper 9. The output shaft of the feed motor 10 passes through the side wall of the feed hopper 9 and extends into the internal channel of the feed hopper 9. A propeller blade 11 is fixedly connected to the end of the output shaft of the feed motor 10. The propeller blade 11 is located in the conveying channel at the bottom of the feed hopper 9 and extends in the same direction as the feed direction. When the feed motor 10 is working, the feed motor 10 drives the propeller blade 11 to rotate at high speed. The axial thrust generated by the rotating propeller blade 11 forces the cement clinker falling into the feed hopper 9 into the interior of the grinding chamber 4 for grinding.

[0034] As a preferred embodiment, to further address the issues of heat dissipation and dust dispersion during the grinding process, please refer to... Figure 1 and Figure 4Two pairs of vertically upward supports 12 are welded and fixed to the top surfaces of base frame 1 and base frame 2, respectively. The two pairs of supports 12 are arranged above the left and right ends of the grinding chamber 4 to form a stable support frame. A long strip of transmission pipe 13 is horizontally erected and fixedly connected between the top ends of the two pairs of supports 12. The transmission pipe 13 is located directly above the axis of the grinding chamber 4 and extends parallel to the axis of the grinding chamber 4. The transmission pipe 13 is used to transport cooling water. A water supply connector 14 is fixedly connected to the right end of the transmission pipe 13. The outer end of the water supply connector 14 is provided with a standard connector. The inlet is used for sealed connection with the external water supply pipe. The transmission pipe 13 has multiple mounting holes at equal intervals along the length of the pipe facing the outer wall of the grinding chamber 4, and multiple nozzles 15 are fixedly connected to them. The water outlet direction of the multiple nozzles 15 is vertically downward and directly facing the outer circumferential surface of the grinding chamber 4. The water mist sprayed by the nozzles 15 can cover the main working area of ​​the grinding chamber 4. The spiral structure of the flow guiding rib 5 is used to guide and retain the water flow, thereby extending the flow path and contact time of the cooling water on the high temperature outer wall of the grinding chamber 4, achieving efficient heat exchange cooling and dust suppression effects.

[0035] Working principle:

[0036] When the high-efficiency ball mill for grinding cement clinker starts running, the operator starts the feed motor 10 and the drive motor 6. The feed motor 10 drives the propeller blade 11 located at the bottom of the feed hopper 9 to rotate at high speed. The propeller blade 11 uses the axial thrust generated by the rotation to force and evenly push the cement clinker in the feed hopper 9 into the interior of the grinding chamber 4. At the same time, the power output by the drive motor 6 is transmitted to the drive gear 8 after the speed is adjusted by the speed change driver 7. The drive gear 8 drives the grinding chamber 4 to rotate stably around the horizontal axis in the bearing seats 3 on the base frame 1 and the base frame 2. As the grinding chamber 4 rotates, the grinding steel balls filled inside are carried to a certain height and then fall down to repeatedly impact and grind the cement clinker entering the chamber to complete the grinding operation. During this process, the flow guiding reinforcing ribs 5 welded to the outer wall of the grinding chamber 4 effectively enhance the structural rigidity of the cylinder.

[0037] When the grinding operation causes the temperature of the grinding chamber 4 to rise or external dust suppression is required, external cooling water is injected into the transmission pipe 13 through the water inlet 14. After the water fills the transmission pipe 13, it is atomized by the equally spaced nozzles 15 and sprayed vertically onto the outer circumferential surface of the rotating grinding chamber 4. The sprayed cooling water falls onto the high-temperature outer wall of the grinding chamber 4 for heat exchange. At this time, the spirally distributed flow-guiding ribs 5 play a key role in blocking and guiding the water flow attached to the outer wall of the grinding chamber 4. The flow-guiding ribs 5 restrict the water flow within the spiral groove and force the water flow to follow the rotation of the grinding chamber 4 along the spiral path. This flow-guiding effect significantly increases the residence time and flow path length of the cooling water on the outer wall of the grinding chamber 4, allowing the cooling water to more fully absorb the high-temperature heat generated by grinding and adsorb dust in the surrounding air, thereby improving the grinding efficiency of cement clinker while ensuring the safe operation of the equipment.

Claims

1. A high-efficiency ball mill for grinding cement clinker, comprising: The base frame 1 (1), the base frame 2 (2) and the grinding chamber (4) are rotatably connected to the base frame 1 (1) and the base frame 2 (2) via bearing seats (3). A drive motor (6) is fixedly installed on the right side of the base frame 1 (1). The output shaft of the drive motor (6) is connected to a speed change driver (7). A drive gear (8) that meshes with the speed change driver (7) is fixedly connected to the left end of the grinding chamber (4). The invention is characterized in that the outer surface of the grinding chamber (4) is fixedly welded with a flow guiding reinforcing rib (5) along the spiral direction, the top of the second base frame (2) is fixedly connected with a feeding chamber (9), the right side of the feeding chamber (9) is fixedly installed with a feeding motor (10), the output shaft of the feeding motor (10) is fixedly connected with a propeller blade (11), the top of the first base frame (1) and the second base frame (2) are both fixedly connected with a bracket (12), a transmission pipe (13) is fixedly connected on the bracket (12), a water supply connector (14) is fixedly connected to the right inlet and outlet of the transmission pipe (13), and multiple nozzles (15) are fixedly connected at equal intervals along the length direction on the side of the transmission pipe (13) facing the grinding chamber (4).

2. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The left and right ends of the grinding chamber (4) are respectively mounted on the top center of the base frame one (1) and the base frame two (2) via the bearing seat (3). The grinding chamber (4) can rotate around the horizontal axis under the drive of the drive motor (6).

3. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The flow guiding reinforcing rib (5) is continuously spirally wound and welded to the outer circumferential cylindrical wall of the grinding chamber (4). The flow guiding reinforcing rib (5) is used to enhance the rigidity of the cylindrical body of the grinding chamber (4) and to guide the cooling water sprayed by the nozzle (15).

4. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The drive motor (6) is fixedly mounted on the support platform extending from the right side of the base frame (1) by bolts. The speed drive (7) is located between the drive motor (6) and the grinding chamber (4) and is fixedly mounted on the top of the base frame (1).

5. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The drive gear (8) is coaxially fixedly sleeved on the outer periphery of the left end of the grinding chamber (4), and the output end of the speed drive (7) is provided with a small gear that meshes with the drive gear (8), thereby driving the grinding chamber (4) to rotate.

6. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The feed bin (9) has a funnel-shaped structure. The bottom outlet of the feed bin (9) is connected to the central feed inlet on the right side of the grinding bin (4). The propeller blade (11) is located in the conveying channel at the bottom of the feed bin (9).

7. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The feed motor (10) is fixedly connected to the shaft of the propeller (11) via a reducer. The feed motor (10) drives the propeller (11) to rotate so as to force the cement clinker into the interior of the grinding chamber (4).

8. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The number of brackets (12) is two pairs and they are in a gate-shaped structure. The two pairs of brackets (12) span the upper right end of the drive gear (8) and the grinding chamber (4), respectively. The bottom of the brackets (12) is welded and fixed to the base frame one (1) and the base frame two (2).

9. The high-efficiency ball mill for grinding cement clinker according to claim 1, characterized in that, The transmission pipe (13) is horizontally mounted between the tops of the two pairs of supports (12). The transmission pipe (13) is located directly above the grinding chamber (4). The transmission pipe (13) is connected to an external water supply device through the water supply connector (14).

10. The high-efficiency ball mill for grinding cement clinker according to claim 9, characterized in that, Multiple nozzles (15) are evenly distributed on the lower surface of the transmission pipe (13), and the spraying direction of the nozzles (15) is perpendicular to the outer wall of the grinding chamber (4) and the spiral groove area between the flow guiding reinforcing ribs (5).

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