Slag vertical mill

Abstract

The invention relates to a slag vertical mill, and belongs to the technical field of slag grinding equipment. The machine shell is arranged on the base and provided with a grinding inner cavity, and the machine shell is further provided with a feeding port and an air inlet. The powder screening assembly is arranged at the top end of the machine shell and used for screening qualified mineral powder in the grinding inner cavity. The grinding assembly comprises a grinding roller, a first driver, a grinding disc and a second driver and is used for grinding slag; the material guiding assembly is located in the grinding inner cavity and comprises a material guiding shell, a vibration motor, a spring and a damper, the material guiding shell is provided with a face part and a back part, the face part of the material guiding shell faces the grinding disc and is in a concave shape, and the damper and the spring are both arranged between the grinding disc and the material guiding shell. According to the slag vertical mill provided by the invention, the guide assembly is arranged in the grinding inner cavity, so that the process that materials flow into the space between the grinding roller and the grinding disc can be accelerated, the flowing of the materials at the tail end can also be pushed, and the waste of the materials is avoided.

Description

Technical Field

[0001] This application relates to the technical field of slag grinding equipment, and in particular to a slag vertical mill. Background Technology

[0002] A vertical roller mill is a large-scale grinding equipment that integrates crushing, drying, grinding, grading, and conveying. It achieves efficient grinding by combining a grinding disc and grinding rollers to crush materials. The material is dispersed under centrifugal force and dried by hot air. Fine powder is collected after being classified by an air classifier, while coarse material is returned for regrinding to achieve the required fineness.

[0003] Because grinding rollers are typically positioned at the edge of the grinding disc, while material is usually fed into the center, it must slide into the gap between the rollers and the disc under centrifugal force to complete the grinding process. However, the grinding disc rotates at a relatively low speed, and the smaller the particle size, the weaker the centrifugal force acting on the material. This smaller centrifugal force may not be sufficient to overcome the frictional forces acting on the material. For example, at the end of slag grinding, because the slag powder particles are small and there are no large slag particles, the centrifugal force acting on the slag powder is relatively small. At this point, the slag powder moves slowly or even stops moving. This prolonged residence not only causes the powdery material to accumulate and adhere to the grinding disc but also results in material waste.

[0004] Therefore, a new type of vertical mill is urgently needed. Summary of the Invention

[0005] To address the problem that in the later stages of grinding in existing vertical mills, smaller particles of material flow slowly or even accumulate on the grinding disc, this application provides a slag vertical mill.

[0006] This application provides a slag vertical mill, which adopts the following technical solution: A slag vertical mill, comprising: Base; The housing is mounted on the base and has a grinding cavity. The housing also has a feed inlet that connects to the grinding cavity. The bottom of the housing has an air inlet that connects to an external pressurized hot air source. A powder screening assembly is located at the top of the housing and is used to screen qualified mineral powder in the grinding chamber; The grinding assembly includes a grinding roller, a first driver, a grinding disc, and a second driver. The first driver is located outside the grinding cavity and its output end is connected to the grinding roller. The second driver is located outside the grinding cavity and its output end is connected to the grinding disc. The grinding disc is located inside the grinding cavity. The grinding roller is located inside the grinding cavity and above the grinding disc. The grinding roller works with the grinding disc to grind the slag. A material guiding assembly is located in the grinding chamber. The material guiding assembly includes a material guiding shell, a vibration motor, a spring, and a damper. The material guiding shell has a face and a back. The face of the material guiding shell faces the grinding disc and is concave. One end of the damper is hinged to the face of the material guiding shell, and the other end is hinged to the surface of the grinding disc. One end of the spring is connected to the face of the material guiding shell, and the other end is connected to the surface of the grinding disc. The vibration motor is connected to the face of the material guiding shell. The back of the material guiding shell has a guiding surface that is "high in the center and low at the periphery".

[0007] By adopting the above technical solution, a material guiding assembly is installed in the grinding cavity to guide the slag flowing in from the inlet, allowing it to flow quickly between the grinding roller and the grinding disc, thus improving the grinding efficiency of the slag. The material guiding assembly includes a material guiding shell, a vibrating motor, a spring, and a damper. The surface of the material guiding shell faces the upper surface of the grinding disc. The vibrating motor, spring, and damper are all located between the material guiding shell and the grinding disc. The vibrating motor is connected to the material guiding shell, and its vibration can be transmitted to the material guiding shell. Both the spring and the damper are connected at one end to the upper surface of the grinding disc and at the other end to the surface of the material guiding shell. When the vibrating motor transmits vibration to the material guiding shell, the spring provides reciprocating movement in the vertical direction, increasing the vibration amplitude of the material guiding shell. The damper ensures that the guide shell quickly returns to its normal state after the vibratory motor stops working. Since the back of the guide shell faces upwards towards the grinding chamber, and the slag flowing in from the inlet falls onto it, the guide shell, under vibration, quickly shakes the slag off its back. Furthermore, because the back of the guide shell has a "high in the middle, low around the edges" guide surface, the slag, after falling onto the back of the guide shell, will quickly flow between the grinding roller and the grinding disc under the combined action of its own gravity and the vibration transmitted by the guide shell. This also ensures that the last piece of slag at the end of the slag material inlet flows between the grinding roller and the grinding disc, avoiding material waste.

[0008] Optionally, the guide surface includes a main surface and a skirt surface. The main surface is conical with the maximum center height. The skirt surface is located at the edge of the main surface. The acute angle formed between the main surface and the grinding disc surface is a first included angle, and the acute angle formed between the skirt surface and the grinding disc surface is a second included angle. The first included angle is smaller than the second included angle.

[0009] By adopting the above technical solution, in order to improve the efficiency of slag flow, the guide surface is divided into two parts: a main surface and a skirt surface. The main surface is conical, with the highest point at the center. The skirt surface is located at the lowest point of the main surface and is annular. The acute angle formed between the main surface and the grinding disc surface is smaller than the acute angle formed between the skirt surface and the grinding disc, thus creating a steeper skirt surface, further improving the slag flow efficiency. Furthermore, under the vibration of the guide shell, the steep skirt surface is more conducive to the shedding of smaller slag particles, preventing slag particles from remaining on the guide shell.

[0010] Optionally, the vibration motor is connected at the center of the guide shell, and there are multiple springs and dampers evenly distributed in a circle with the vibration motor as the center.

[0011] By adopting the above technical solution, in order to improve the stability of the guide shell during vibration, the vibration motor is set at the center of the guide shell, and multiple springs and dampers are set, all of which are evenly distributed in a circle with the vibration motor as the center.

[0012] Optionally, the material guiding assembly further includes a connecting rod, through which the vibration motor is connected to the face of the material guiding shell.

[0013] By adopting the above technical solution, in order to further improve the efficiency of the vibratory motor in transmitting vibration to the guide shell and to facilitate the maintenance of the vibratory motor, a connecting rod is provided on the surface of the guide shell, and the vibratory motor is detachably fixed to the connecting rod.

[0014] Optionally, the material guiding assembly further includes hinge seats, which are respectively disposed on the upper surface of the grinding disc and the face of the material guiding shell, and both ends of the damper are connected to the corresponding hinge seats.

[0015] By adopting the above technical solution, in order to improve the stability of the damper during expansion and contraction, and to ensure regular and predictable vibration of the guide shell within the grinding cavity, hinge seats are provided on both the upper surface of the grinding disc and the inner surface of the guide shell, with the damper mounted on the hinge seats. This design not only restricts the relative position of the guide shell and the grinding disc, but also ensures that the guide shell quickly returns to stability after the vibrating motor stops vibrating.

[0016] Optionally, the spring and the damper are spaced apart from each other.

[0017] By adopting the above technical solution, since there are multiple springs and dampers, but they are arranged in a spaced-out manner, it is more conducive to improving the stability of the guide shell.

[0018] Optionally, the material guiding assembly further includes a piezoelectric ceramic sheet disposed on the surface of the material guiding shell and corresponding to the skirt surface.

[0019] By adopting the above technical solution, since the slag will collide with each other during the falling process, and small particles will be generated when the slag falls on the surface of the guide shell, when the slag has a certain moisture content, the small particles are likely to adhere to the back of the guide shell, especially the edge of the guide shell. Therefore, a piezoelectric ceramic sheet is set at this point. The piezoelectric ceramic sheet will generate ultrasonic waves when energized, and thus there will be a certain ultrasonic wave on the skirt surface of the guide shell. The high frequency ultrasonic wave far exceeds the vibration frequency of the guide shell itself, which is more conducive to the shaking of small slag particles, and thus more smoothly flows from the guide shell to the grinding roller and grinding disc.

[0020] Optionally, the piezoelectric ceramic sheets are multiple and evenly distributed in a circle around the vibrating motor.

[0021] By adopting the above technical solution, in order to improve the flow efficiency of small granular slag, multiple piezoelectric ceramic plates are set in a circumferentially evenly distributed manner.

[0022] Optionally, the material guiding assembly further includes a battery connected to the piezoelectric ceramic sheet, the battery being connected to the face of the material guiding shell and located to the side of the piezoelectric ceramic sheet.

[0023] By adopting the above technical solution, due to the special placement of the piezoelectric ceramic sheet, in order to prevent the power supply wire of the piezoelectric ceramic sheet from falling off, the power supply is placed in the particle tray.

[0024] Optionally, there is a gap between the outer edge of the feed guide shell and the grinding roller.

[0025] By adopting the above technical solution, since the guide shell will vibrate under certain conditions and also vibrate relative to the grinding roller, in order to avoid interference between the guide shell and the grinding roller, there is a gap between the outer edge of the guide shell and the grinding roller.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By incorporating a guiding assembly within the grinding chamber, particularly a guiding shell with a "high center, low periphery" guiding surface, combined with the synergistic effect of a vibrating motor, springs, and dampers, the slag, after falling into the guiding shell, flows rapidly and evenly between the grinding rollers and the grinding disc. The continuous vibration provided by the vibrating motor not only enhances the flowability of the material but also prevents slag from accumulating or stagnating in the center of the grinding disc. The springs amplify the vibration amplitude, while the dampers ensure that the guiding shell quickly returns to stability after vibration ceases. This structure is suitable for slag materials with high moisture content or those prone to adhesion, effectively reducing material waste and cleaning frequency.

[0027] 2. The guide surface is further divided into a main surface and a skirt surface. The main surface is relatively flat to buffer the impact of the incoming material; the skirt surface is steeper to accelerate the material's slide. This structural design not only improves the flow efficiency of the slag but also effectively prevents fine or damp slag particles from adhering to the guide surface through the combination of a vibrating motor and high-frequency ultrasonic piezoelectric ceramic plates. The ultrasonic waves generated by the piezoelectric ceramic plates keep the slag particles active, preventing them from accumulating on the guide surface. The circumferential arrangement of multiple piezoelectric ceramic plates further enhances the anti-adhesion effect, ensuring that the guide surface remains smooth and improving the long-term stability of the equipment.

[0028] 3. The material guide assembly adopts a hinged base and connecting rod structure, making the installation of key components such as the vibratory motor and damper more stable and the vibration transmission more efficient. The springs and dampers are arranged alternately, enhancing the balance of the material guide shell during vibration. Furthermore, the material guide shell, along with its internal components, can be removed as a whole by simply disassembling the hinged base pin, facilitating maintenance or replacement. In addition, the built-in design of the piezoelectric ceramic sheet and battery avoids the problem of external wiring easily coming loose, reduces the impact on the vibration system, and extends the service life of the equipment. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of the slag vertical mill provided in this application; Figure 2 yes Figure 1 A structural diagram from another angle; Figure 3 This is a half-sectional view of the slag vertical mill provided in this application; Figure 4 This is a three-dimensional sectional view of the slag vertical mill provided in this application; Figure 5 This is a schematic diagram of the structure of the material guiding assembly, grinding disc and grinding roller mating area in this application; Figure 6 This is a schematic diagram of the material guiding assembly provided in this application; Figure 7 yes Figure 6 A structural diagram from the first angle; Figure 8 yes Figure 6 A structural diagram from the second angle.

[0030] In the picture: 1. Base; 2. Machine casing; 3. Powder sieving assembly; 4. Grinding assembly; 5. Material guiding assembly; 41. Grinding roller; 42. First driver; 43. Grinding disc; 44. Second driver; 51. Feed guide shell; 52. Vibration motor; 53. Spring; 54. Damper; 55. Connecting rod; 56. Hinge seat; 57. Piezoelectric ceramic sheet; 58. Storage battery; 511. Main body surface; 512. Skirt edge surface. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0032] Example 1 See Figures 1 to 5 This application discloses a slag vertical mill. The slag vertical mill includes a base 1, a casing 2, a sieving assembly 3, a grinding assembly 4, and a feeding assembly 5.

[0033] The housing 2 is mounted on the base 1, and the sieving assembly 3 is mounted on the top of the housing 2. The housing 2 has a grinding chamber, and the sieving assembly 3 is connected to the grinding chamber and is used to screen out the slag powder in the grinding chamber.

[0034] participate Figures 1 to 4 The grinding assembly 4 is used to grind the slag in the grinding cavity. The grinding assembly 4 includes a grinding roller 41, a first driver 42, a grinding disc 43, and a second driver 44. The second driver 44 is set on the ground and provides rotational power to the grinding disc 43, which is rotatably set in the grinding cavity. The rotation axis of the grinding disc 43 is perpendicular to the ground. The second driver 44 is usually selected as a motor, and the motor is connected to a reducer to transmit power to the grinding disc 43. The first driver 42 is set outside the grinding cavity, and the grinding roller 41 is set inside the grinding cavity. The first driver 42 is connected to the grinding roller 41 and provides rotational power to the grinding roller 41. The grinding roller 41 is located above the grinding disc 43, and there is a certain gap between its outer edge and the grinding disc 43. The rotation axis of the grinding roller 41 forms a certain angle with the upper surface of the grinding disc 43. The grinding of the slag is achieved by the rotation of the grinding roller 41.

[0035] See Figure 5 To improve grinding efficiency, two grinding rollers 41 and two first drivers 42 are configured in a one-to-one correspondence. The two grinding rollers 41 are arranged symmetrically.

[0036] See Figure 1 and Figure 2 The casing 2 is equipped with a feed inlet and an air inlet, both of which are connected to the grinding chamber. The feed inlet is used to add materials (e.g., slag) into the grinding chamber, and the air inlet is used to fill the grinding chamber with hot air so that the ground slag powder can enter the screening component 3 for screening. Unqualified slag powder will fall back into the grinding chamber for grinding.

[0037] See Figures 3 to 5 The material guiding assembly 5 is disposed in the grinding cavity and located at the center of the grinding disc 43, and is used to guide the material (e.g., slag powder) falling into the feed port. The material guiding assembly 5 includes a material guiding shell 51, a vibration motor 52, a spring 53, and a damper 54. The guide shell 51 has a face and a back. The face faces the grinding disc 43 and is concave. The guide shell 51 is like a "bowl" placed on the grinding disc 43. The vibration motor 52, spring 53 and damper 54 are arranged inside the "bowl". The vibration motor 52 is connected to the face of the guide shell 51 and provides vibration to the guide shell 51 when it is energized. One end of the spring 53 is connected to the grinding disc 43 and the other end is connected to the guide shell 51. When the material falls onto the guide shell 51, the spring 53 will absorb the impact force on the guide shell 51. One end of the damper 54 is connected to the grinding disc 43 and the other end is connected to the guide shell 51. When the vibration motor 52 stops vibrating, in order to make the guide shell 51 quickly return to stability, the damper 54 can absorb and dissipate the vibration energy on the guide shell 51.

[0038] See Figures 6 to 8 Since the guide shell 51 resembles an inverted bowl, its back has a guiding surface (i.e., this surface contacts and slides relative to the material). To ensure the material smoothly enters between the grinding roller 41 and the grinding disc 43, the guiding surface is designed with a "high center, low periphery" shape; that is, from a top view, the guiding surface is circular, with the highest point at the center and decreasing in height further away from the center. In this state, once slag falls from the inlet onto the guide shell 51, it flows into the space between the grinding roller 41 and the grinding disc 43 under its own weight. When the guide shell 51 vibrates, the slag enters the space between the grinding roller 41 and the grinding disc 43 in a "bouncing" motion, further improving the efficiency of slag movement. In addition, since some slag powder does not pass through the screening component 3, this part of the slag powder will return to the grinding chamber. Under its own weight, it will fall back onto the guide shell 51. Since the guide shell 51 is constantly vibrating, the slag powder will fall off the guide shell 51 with the vibration and then flow into the grinding roller 41 and the grinding disc 43 for further grinding.

[0039] Due to the vibration of the feed shell 51, the flowability of the slag powder will be increased. Therefore, compared with the traditional vertical mill, the slag powder will not accumulate in a certain position on the grinding disc 43, nor will it hinder the material from flowing between the grinding roller 41 and the grinding disc 43.

[0040] To facilitate maintenance of the vibratory motor 52, a connecting rod 55 is welded to the surface of the guide shell 51, and the vibratory motor 52 is detachably fixed to the connecting rod 55.

[0041] See Figure 8To improve the efficiency and rate of material (slag or slag powder) flow, the guide surface on the back of the guide shell 51 consists of two parts: a central main surface 511 and a surrounding skirt surface 512. Both the main surface 511 and the skirt surface 512 are symmetrical structures. The acute angle formed between the main surface 511 and the upper surface of the grinding disc 43 is the first included angle, and the acute angle formed between the skirt surface 512 and the grinding disc 43 is the second included angle. The first included angle is smaller than the second included angle. From an appearance perspective, the skirt surface 512 is steeper, while the main surface 511 is gentler. Since the main surface 511 receives the slag entering through the feed inlet, the gentler main surface 511 is more conducive to reducing the impact force generated when the slag enters. After the impact force of the slag is weakened, the steep skirt surface 512 is more conducive to the rolling of the slag, thus allowing it to enter between the grinding roller 41 and the grinding disc 43.

[0042] See Figure 6 and Figure 7 In order to install the guide shell 51 onto the grinding disc 43 and prevent the guide shell 51 from detaching from the grinding disc 43 during vibration, hinge seats 56 are provided on the guide shell 51 and the grinding disc 43. Then, the two ends of the damper 54 are respectively connected to the corresponding hinge seats 56. By setting the hinge seats 56, the stability of the damper 54 can be effectively improved.

[0043] See Figure 6 and Figure 7 To improve the stability of spring 53 during deformation, a cylindrical guide protrusion is provided on the grinding disc 43, which passes through the spring 53 to enhance its stability during deformation. Additionally, the top of spring 53 can be welded to the guide shell 51 for easier installation.

[0044] When maintenance is required on the components inside the guide shell 51, simply lift the guide shell 51 and push out (or pull out) the pin between the damper 54 and the hinge seat 56 on the grinding disc 43 to separate the damper 54 from the grinding disc 43. Then, when the guide shell 51 is removed, the vibration motor 52, spring 53 and damper 54 are also removed together.

[0045] Example 2 When slag, carrying a certain amount of moisture, falls from the feed inlet onto the guide shell 51, it transfers this moisture to the guide surface of the shell. Although warm air is introduced into the grinding chamber, slag powder also falls onto the guide shell 51. Before the warm air dries the slag residue left on the shell, slag powder may adhere to the surface of the guide surface. This accumulation of slag powder creates an uneven surface, hindering the slag or slag powder from sliding off. To address this problem, this embodiment provides a novel vertical slag mill.

[0046] See Figures 6 to 8 Compared to the slag vertical mill provided in Embodiment 1, the slag vertical mill provided in this embodiment has an additional piezoelectric ceramic plate 57 and a battery 58 in the feed guide assembly 5. All other structures and functions are the same.

[0047] The piezoelectric ceramic sheet 57 is disc-shaped and is positioned on the surface of the feed guide shell 51. The battery 58 is also positioned on the surface of the feed guide shell 51. This design prevents slag from falling onto the piezoelectric ceramic sheet 57 and the battery 58, thus improving their lifespan. The battery 58 is electrically connected to the piezoelectric ceramic sheet 57, which generates high-frequency ultrasonic waves. These ultrasonic waves penetrate the outside of the feed guide shell 51, enveloping its back. When slag powder approaches the feed guide surface of the feed guide shell 51, it is subjected to these ultrasonic waves, causing significant vibration (due to the energy absorbed by the slag particles, their state is relatively active). Once the slag contacts the feed guide surface, it bounces back rapidly, greatly reducing the probability of contact with wet markings on the feed guide surface. Meanwhile, due to the presence of ultrasound, the moist imprint changes from a "continuous water film" to "individual tiny water droplets," increasing the surface area of ​​the imprint in contact with the air and thus increasing the evaporation efficiency. By setting a piezoelectric ceramic sheet 57 to generate ultrasound on the back of the feed guide shell 51, the probability of slag powder adhering to the feed guide surface is reduced.

[0048] To further reduce the probability of slag powder adhering to the feed guide surface, multiple piezoelectric ceramic sheets 57 are arranged in a circular pattern with the vibration motor 52 as the center. Furthermore, the piezoelectric ceramic sheets 57 are positioned on the surface of the feed guide shell 51 corresponding to the skirt surface 512. Since slag powder mostly flows downwards from the skirt surface 512, placing the piezoelectric ceramic sheets 57 on this corresponding surface is more conducive to the flow of slag powder.

[0049] It should be noted that the piezoelectric ceramic sheet 57 is powered by a battery 58. In order to avoid the battery 58 being too large and affecting the vibration of the guide shell 51, the battery 58 is selected to be small in size, and the number of batteries 58 is selected to be multiple.

[0050] The power supply for the vibration motor 52 passes through the gap between the grinding disc 43 and the housing and is connected to an external power source. The connecting cable is an armored cable.

[0051] The implementation principle of this application for a vertical slag mill is as follows: When the vertical mill needs to grind materials (slag), the first driver 42, the second driver 44 and the vibration motor 52 are started first. Then, slag is added from the feed inlet. The slag falls onto the guide shell 51 and receives the impact force in the guide shell 51. The slag flows along the guide surface into the space between the grinding roller 41 and the grinding disc 43. Then, the slag is crushed between the grinding roller 41 and the grinding disc 43. After crushing for a certain period of time, hot air is introduced into the grinding cavity through the air inlet. The hot air blows the slag powder and forms an annular airflow that carries the slag powder into the sieving component 3 located at the top of the casing 2. The sieving component 3 has a filtering function and can screen out the casing 2 of the powder that meets the size requirements. The slag powder that does not meet the size requirements will fall back into the grinding cavity for grinding. Because of the material guiding component 5, neither slag nor slag powder will fall into the center of the grinding disc 43. Instead, they will be guided by the material guiding surface and quickly enter between the grinding roller 41 and the grinding disc 43, which improves the grinding efficiency of the material and avoids material waste.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vertical slag mill, characterized in that, include: Base (1); The housing (2) is set on the base (1) and has a grinding cavity. The housing (2) is also provided with a feed inlet, which is connected to the grinding cavity. The bottom end of the housing (2) is provided with an air inlet, which is connected to an external pressurized hot air source. The powder screening assembly (3) is located at the top of the housing (2) and is used to screen qualified mineral powder in the grinding chamber; The grinding assembly (4) includes a grinding roller (41), a first driver (42), a grinding disc (43), and a second driver (44). The first driver (42) is located outside the grinding cavity and its output end is connected to the grinding roller (41). The second driver (44) is located outside the grinding cavity and its output end is connected to the grinding disc (43). The grinding disc (43) is located in the grinding cavity. The grinding roller (41) is located in the grinding cavity and above the grinding disc (43). The grinding roller (41) works with the grinding disc (43) to grind the slag. The material guiding assembly (5) is located in the grinding cavity. The material guiding assembly (5) includes a material guiding shell (51), a vibration motor (52), a spring (53), and a damper (54). The material guiding shell (51) has a face and a back. The face of the material guiding shell (51) faces the grinding disc (43) and is concave. One end of the damper (54) is hinged to the face of the material guiding shell (51), and the other end is hinged to the surface of the grinding disc (43). One end of the spring (53) is connected to the face of the material guiding shell (51), and the other end is connected to the surface of the grinding disc (43). The vibration motor (52) is connected to the face of the material guiding shell (51). The back of the material guiding shell (51) has a material guiding surface that is "high in the center and low at the periphery".

2. The slag vertical mill according to claim 1, characterized in that: The guiding surface includes a main surface (511) and a skirt surface (512). The main surface (511) is a conical surface with the largest center height. The skirt surface (512) is located at the edge of the main surface (511). The acute angle formed between the main surface (511) and the surface of the grinding disc (43) is the first included angle, and the acute angle formed between the skirt surface (512) and the surface of the grinding disc (43) is the second included angle. The first included angle is smaller than the second included angle.

3. A slag vertical mill according to claim 2, characterized in that: The vibration motor (52) is connected at the center of the guide shell (51), and there are multiple springs (53) and dampers (54) that are evenly distributed in a circle with the vibration motor (52) as the center.

4. A slag vertical mill according to claim 3, characterized in that: The material guiding assembly (5) also includes a connecting rod (55), and the vibration motor (52) is connected to the face of the material guiding shell (51) by means of the connecting rod (55).

5. A slag vertical mill according to claim 4, characterized in that: The material guiding assembly (5) also includes a hinge seat (56), which is respectively disposed on the upper surface of the grinding disc (43) and the face of the material guiding shell (51). Both ends of the damper (54) are connected to the corresponding hinge seat (56).

6. A slag vertical mill according to claim 3, characterized in that: The spring (53) and the damper (54) are spaced apart from each other.

7. A slag vertical mill according to claim 2, characterized in that: The material guiding assembly (5) also includes a piezoelectric ceramic sheet (57), which is disposed on the surface of the material guiding shell (51) and corresponds to the skirt surface (512).

8. A slag vertical mill according to claim 7, characterized in that: The piezoelectric ceramic sheets (57) are multiple and are evenly distributed in a circle around the vibrating motor (52).

9. A slag vertical mill according to claim 8, characterized in that: The material guiding assembly (5) also includes a battery (58) that is connected to the piezoelectric ceramic sheet (57). The battery (58) is connected to the face of the material guiding shell (51) and located to the side of the piezoelectric ceramic sheet (57).

10. A slag vertical mill according to any one of claims 1-9, characterized in that: There is a gap between the outer edge of the feed guide shell (51) and the grinding roller (41).

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