Steel ball mill

Abstract

The utility model discloses a kind of steel ball grinding mill, comprising: rack, setting shell interior forms processing cavity;Rolling mill assembly, setting in rack, including grinding ring and grinding ball, the grinding ring drives the grinding ball rotation;Pressure device, including pressurizing component, the pressurizing component provides pressure to the rolling mill assembly;Power device, for driving the rolling mill assembly rotation.The utility model has beneficial effects that material is crushed under the extrusion, grinding of grinding ball and lower grinding ring, material and grinding ball contact area are large, and grinding efficiency is high.Grinding ring is fixed with pressure device, and the grinding pressure is controlled by pressure device, and the granularity of material out of mill is controllable.

Description

Technical Field

[0001] This utility model relates to the field of ore processing technology, specifically to a steel ball mill. Background Technology

[0002] Vertical grinding mill (abbreviated as verter mill) is a high-efficiency and energy-saving large-scale grinding equipment, widely used in industries such as cement, power, metallurgy, chemical, and non-metallic minerals. It is mainly used for grinding materials with medium or lower hardness, such as cement raw materials, clinker (slag), coal, phosphate rock, and quartz sand.

[0003] Traditional steel ball mills typically use a rotating cylinder to drive steel balls for impact grinding, which suffers from high energy consumption and inconvenient particle size adjustment. Some vertical mills use grinding rollers to crush materials, but these rollers are prone to wear and have uneven pressure distribution. For example, utility model patent CN2309892Y discloses a vertical centrifugal grinding device with spherical grinding media and fixed-gap annular grinding discs that work with steel balls, but it cannot dynamically adjust the grinding pressure, resulting in inflexible fineness control and difficulty in adapting to diverse material requirements. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a steel ball mill. The grinding balls roll in a roller conveyor between the lower and upper grinding rings, and simultaneously rotate by constantly changing their own axis of rotation. The material is crushed under the pressure and grinding of the grinding balls and the lower grinding ring. The contact area between the material and the grinding balls is large, resulting in high grinding efficiency. The upper grinding ring is fixed to a pressure device, and the grinding pressure is controlled by the pressure device, making the particle size of the discharged material controllable.

[0005] Specifically, this utility model discloses a steel ball grinding mill, comprising:

[0006] The frame, with a machining cavity formed inside the machine housing;

[0007] A grinding assembly, housed within a frame, includes a grinding ring and grinding balls, wherein the grinding ring drives the grinding balls to rotate;

[0008] A pressure device, including a pressure application assembly that provides pressure to the tumbling assembly;

[0009] A power unit is used to drive the grinding assembly to rotate.

[0010] The advantages of adopting the above technical solution are that the material is crushed under the extrusion and grinding of the grinding balls and the lower grinding ring, the contact area between the material and the grinding balls is large, and the grinding efficiency is high. The upper grinding ring is fixed to the pressure device, the grinding pressure is controlled by the pressure device, and the particle size of the material exiting the mill is controllable.

[0011] Furthermore, the grinding ring includes an upper grinding ring and a lower grinding ring, both of which are provided with an arc-shaped roller track for the movement of the grinding balls, and a plurality of grinding balls are provided in the roller track.

[0012] The advantage of adopting the above technical solution is that the grinding balls roll between the upper and lower grinding rings to crush and grind the material. Due to the setting of the arc-shaped roller channel, the grinding balls are always located between the upper and lower grinding rings during the grinding process, ensuring the grinding life.

[0013] Furthermore, the grinding assembly also includes a transmission seat, the lower grinding ring is detachably connected to the transmission seat, the power device drives the transmission seat to rotate, and the transmission seat drives the lower grinding ring to rotate.

[0014] The advantage of adopting the above technical solution is that the transmission seat plays a role in connection and fixation, and is driven by the power unit, which has higher transmission efficiency and lower power consumption.

[0015] Furthermore, the pressure device also includes a pressure seat, which is connected to the upper grinding ring, and the pressurizing component is connected to the pressure seat to control the height of the upper grinding ring.

[0016] The advantage of adopting the above technical solution is that it enables pressure control of the upper grinding ring, adjusts the grinding pressure of the grinding balls, and makes the particle size of the ground material controllable.

[0017] Furthermore, a separator is installed on the frame, and a material plate is provided on the lower side of the separator, with a channel for the product to pass through in the middle of the material plate.

[0018] The advantage of adopting the above technical solution is that the separator is used to classify the ground material. Material that meets the fineness requirement is discharged from the separator, while material that does not meet the fineness requirement falls to the tumbling mill assembly for re-grinding.

[0019] Furthermore, the housing is provided with a feed inlet, and the housing is divided into an upper housing and a lower housing. The upper housing and the lower housing are detachably fixed, and the housing is provided with multiple sealing components.

[0020] The advantages of adopting the above technical solution are that the detachable upper and lower housings facilitate internal maintenance, and the multiple seals create a sealed installation space inside the equipment, effectively preventing dust from overflowing.

[0021] Furthermore, the power unit includes a transmission spindle, a reducer, and a motor. The motor is connected to the reducer, the reducer is connected to the transmission spindle, and the transmission spindle is connected to the transmission base.

[0022] The advantage of adopting the above technical solution is that by setting up a transmission spindle and a reducer to drive the spindle to rotate, power is provided to the equipment, resulting in higher transmission efficiency.

[0023] Furthermore, the frame is provided with an air duct, the air duct is provided with an air inlet, and the interior of the air duct is connected to the processing chamber.

[0024] The advantage of adopting the above technical solution is that the ground material is blown to the upper separator for classification by air intake through the air inlet.

[0025] Furthermore, the pressurizing component is a hydraulic cylinder, the frame is provided with a base plate, the main body of the hydraulic cylinder is connected to the base plate, and the output end is hinged to the pressure seat.

[0026] The advantage of adopting the above technical solution is that the hydraulic cylinder is used to provide pressure to the upper grinding ring, change the preload of the grinding ring, and realize the fineness control of grinding. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0028] Figure 1 This is a cross-sectional view of the overall structure of the steel ball mill of this utility model.

[0029] Figure 2 This is an isometric drawing of the overall structure of the steel ball mill of this utility model.

[0030] Figure 3 This is a structural diagram of the installation of the grinding assembly and pressure device of this utility model.

[0031] Figure 4 This is a schematic diagram of the lower grinding ring of this utility model.

[0032] The reference numerals used in the attached figures are as follows:

[0033] Frame 1; Housing 11; Air duct 12; Air inlet 13; Feed inlet 16; Grinding balls 2; Pressurizing assembly 3; Upper grinding ring 31; Lower grinding ring 32; Transmission seat 33; Pressure seat 34; Power unit 4; Motor 41; Transmission shaft 42; Reducer 43; Separator 5; Material plate 51; Base plate 6; Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings.

[0035] like Figure 1-4 As shown, this utility model discloses a steel ball grinding mill, comprising:

[0036] The frame 1 has a housing 11 on the outside, and a processing cavity is formed inside;

[0037] The grinding assembly is installed inside the frame 1 and includes a grinding ring and grinding balls 2, wherein the grinding ring drives the grinding balls 2 to rotate;

[0038] A pressure device includes a pressure application component 3, which provides pressure to the tumbling assembly;

[0039] Power unit 4 is used to drive the grinding assembly to rotate.

[0040] The advantages of adopting the above technical solution are that the material is crushed under the extrusion and grinding of the grinding balls 2 and the lower grinding ring 32, the contact area between the material and the grinding balls 2 is large, and the grinding efficiency is high. The upper grinding ring 31 is fixed to the pressure device, the grinding pressure is controlled by the pressure device, and the particle size of the material exiting the mill is controllable.

[0041] The grinding ring includes an upper grinding ring 31 and a lower grinding ring 32. Both the upper and lower grinding rings 31 have arc-shaped roller tracks in their middle sections for the movement of grinding balls 2. Multiple grinding balls 2 are arranged within these roller tracks. The arc-shaped roller tracks of both the upper and lower grinding rings 31 and 32 have textured surfaces to increase friction, causing the grinding balls 2 to roll within the roller tracks and continuously change their axis of rotation, maintaining a spherical shape. The grinding balls 2 roll between the upper and lower grinding rings 31 and 32, achieving the crushing and grinding of materials. Due to the arc-shaped roller tracks, the grinding balls 2 remain between the upper and lower grinding rings 32 throughout the grinding process, ensuring a long grinding life.

[0042] Furthermore, the grinding assembly also includes a transmission seat 33, which is a plate-shaped part with a step on its upper surface for positioning the lower grinding ring 32. The transmission seat 33 of the lower grinding ring 32 is fixed by screws. The power unit 4 drives the transmission seat 33 to rotate, and the transmission seat 33 drives the lower grinding ring 32 to rotate.

[0043] The power unit 4 includes a transmission shaft 42, a reducer 43, and a motor 41. The motor 41 is connected to the reducer 43, and the reducer 43 is connected to the transmission shaft 42. The top of the transmission shaft 42 is fixedly connected to the transmission seat 33, and the lower side is connected to the reducer 43 via a coupling. The reducer 43 converts the high-speed, low-torque motor 41 into a low-speed, high-torque motor, meeting the high torque required for the lower grinding ring 32 to drive the grinding balls 2 to crush materials, especially for high-hardness materials. At the same time, the reducer 43 shares the load on the bearings of the motor 41, preventing the mill load from directly acting on the motor 41 and extending the life of the motor 41.

[0044] In some embodiments, the pressure device further includes a pressure seat 34, which is fixedly connected to the upper grinding ring 31 by bolts, and the pressure assembly 3 is connected to the pressure seat 34 to control the height of the upper grinding ring 31;

[0045] Among them, the pressurizing component 3 is a hydraulic cylinder, which is symmetrically installed. The frame 1 is equipped with a base plate 6, which can be fixed by welding or other means. The main body of the hydraulic cylinder is hinged to the base plate 6, and the output end is connected to the pressure seat 34. An installation block is fixed on the upper side of the pressure seat 34. The output end of the hydraulic cylinder is hinged to the pressure seat 34. The pressure cylinders on both sides extend or descend at the same time to change the position of the upper grinding ring 31 and adjust the grinding pressure of the grinding ball 2 so that the particle size of the ground material can be controlled.

[0046] In some implementations, a separator 5 is installed on the frame 1. The separator 5 has a material outlet on its upper side for discharging qualified materials. The separator 5 also has a rotor and a drive assembly. The rotor rotates under the drive assembly to achieve grading. The structure and working principle of the separator 5 are existing technologies and will not be described in detail here. A material plate 51 is provided on the lower side of the separator 5. The material plate 51 has a channel in the middle for the product to pass through. The material plate 51 is fixedly installed in the frame 1 and has an outwardly expanding opening on its upper side. It is located on the lower side of the separator 5, and its channel faces the middle position of the upper grinding ring 31 installed below, so that the material that does not meet the fineness requirements falls from the material plate 51 back to the middle of the grinding ring for re-grinding.

[0047] Furthermore, the housing 11 is provided with a feed inlet 16. The housing 11 is divided into an upper housing and a lower housing. The upper housing and the lower housing are detachably fixed. The housing 11 is provided with multiple seals. The feed inlet 16 is provided with a downwardly inclined flow channel inside the housing 11. The flow channel guides the material to fall to the center of the grinding ring and is ground by the grinding balls 2.

[0048] Furthermore, the frame 1 is equipped with an air duct 12, which is located below the tumbling mill device. The air duct 12 is equipped with an air inlet 13, which is connected to a blower. The interior of the air duct 12 is connected to the processing chamber. Air is introduced through the air inlet 13 to classify the ground product, and the ground material is blown upward to the separator 5 for further classification.

[0049] In operation, the material first enters the grinding mill through the feed inlet 16. Under centrifugal force, the material is thrown into the roller conveyor of the lower grinding ring 32. The grinding balls 2 grind the material in the roller conveyor. The ground material is carried by the rising airflow to the upper separator 5. Qualified powder passes through the separator 5, while excessively coarse material enters the collection hopper and falls back to the lower grinding ring 32 for further grinding. During the grinding process, the relative height of the upper grinding ring 31 and the lower grinding ring 32 is controlled by a pressurizing device. The pressure of the grinding balls 2 crushing the material is provided by the upper grinding ring 31. Adjusting the height of the upper grinding ring 31 allows for the production of materials of different particle sizes.

[0050] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A steel ball grinding mill, characterized in that, include: The frame (1) is provided with a machining cavity formed inside the housing (11); The grinding assembly is set inside the frame (1) and includes a grinding ring and grinding balls (2), wherein the grinding ring drives the grinding balls (2) to rotate; The pressure device includes a pressure assembly (3) that provides pressure to the grinding assembly; The power unit (4) is used to drive the grinding assembly to rotate.

2. The steel ball mill according to claim 1, characterized in that, The grinding ring includes an upper grinding ring (31) and a lower grinding ring (32). Both the upper grinding ring (31) and the lower grinding ring (32) are provided with an arc-shaped roller track for the grinding balls (2) to move. Multiple grinding balls (2) are provided in the roller track.

3. The steel ball mill according to claim 2, characterized in that, The grinding assembly also includes a transmission seat (33), the lower grinding ring (32) is detachably connected to the transmission seat (33), the power device (4) drives the transmission seat (33) to rotate, and the transmission seat (33) drives the lower grinding ring (32) to rotate.

4. The steel ball mill according to claim 3, characterized in that, The pressure device also includes a pressure seat (34), which is connected to the upper grinding ring (31). The pressurizing component (3) is connected to the pressure seat (34) and is used to control the height of the upper grinding ring (31).

5. The steel ball mill according to claim 1, characterized in that, A separator (5) is installed on the frame (1), and a material plate (51) is provided on the lower side of the separator (5). A channel for the product to pass through is provided in the middle of the material plate (51).

6. The steel ball mill according to claim 1, characterized in that, The housing (11) is provided with a feed inlet (16). The housing (11) is divided into an upper housing and a lower housing. The upper housing and the lower housing are detachably fixed. The housing (11) is provided with multiple sealing elements.

7. The steel ball mill according to claim 3, characterized in that, The power unit (4) includes a transmission spindle (42), a reducer (43) and a motor (41). The motor (41) is connected to the reducer (43), the reducer (43) is connected to the transmission spindle (42), and the transmission spindle (42) is connected to the transmission seat (33).

8. The steel ball mill according to claim 1, characterized in that, The frame (1) is provided with an air duct (12), the air duct (12) is provided with an air inlet (13), and the interior of the air duct (12) is connected to the processing cavity.

9. The steel ball mill according to claim 4, characterized in that, The pressurizing component (3) is a hydraulic cylinder. The frame (1) is provided with a base plate (6). The main body of the hydraulic cylinder is hinged to the base plate (6), and the output end is connected to the pressure seat (34).

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