Metal ore ring roller grinding device

Abstract

The utility model relates to non ferrous metal dressing technique field, the utility model provides a kind of metal ore ring roller mill device, including cylinder, cylinder inside is separated into grinding cavity and powder cavity by screen, motor is provided on screen, motor rotation is connected with millstone, millstone is evenly distributed with several rotating shafts, rotating shaft is rotationally connected with mill roller group, cylinder is equipped with grinding cylinder in grinding cavity inner wall, grinding cylinder is opened in and is equipped with with mill roller group cooperation for grinding ore grinding groove, cylinder top is equipped with the feeding pipe that passes through between grinding cylinder and mill roller group, cylinder bottom is equipped with the suction pipe that is communicated with powder cavity, by the synergistic effect of mill roller group revolution, rotation and grinding groove in grinding cylinder, annular rolling area is formed, broken grinding ore, in combination with the suction of suction pipe of cylinder bottom, powder is separated and collected, realize grinding and separation integration, avoid dust pollution.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal beneficiation technology, and more specifically, to a metal ore ring roller grinding device. Background Technology

[0002] In the field of non-ferrous metal beneficiation, fine grinding of ores is a crucial step in experimental research and production. The particle size uniformity of mineral samples directly affects the accuracy of subsequent processes such as sorting and purification. However, traditional grinding equipment faces significant bottlenecks in areas such as efficient classification, dust control, and structural stability. Especially when processing high-hardness metallic ores (such as iron ore and silica-bearing ores), due to the complex material characteristics and high grinding intensity, existing equipment often suffers from problems such as low grinding efficiency, severe fine powder escape, and excessive mechanical wear, making it difficult to meet the stringent requirements of modern mineral processing technologies for high precision, low energy consumption, and environmental friendliness.

[0003] Existing metal ore grinding equipment often suffers from uneven grinding force distribution, leading to over-grinding or insufficient dissociation of ore particles. This results in insufficient grinding efficiency and deviations in particle size control, increasing screening load and affecting the recovery rate of valuable minerals. Furthermore, highly abrasive ores accelerate the wear of critical components such as grinding rollers and cylinders, leading to increased downtime for maintenance and significantly reducing production continuity. The accompanying dust emissions and high energy consumption further exacerbate environmental and operational pressures. Utility Model Content

[0004] The purpose of this invention is to provide a metal ore ring roller grinding device that solves the problems of uneven particle size and dust pollution in metal ore grinding.

[0005] This utility model is achieved through the following technical solution: a metal ore ring roller grinding device, including a cylinder, the inside of which is divided into a grinding chamber and a powder chamber by a screen, a motor is installed on the screen, the motor is rotatably connected to a grinding disc, a plurality of rotating shafts are evenly distributed around the circumference of the grinding disc, and a grinding roller assembly is rotatably connected to the rotating shafts, a grinding cylinder is provided on the inner wall of the grinding chamber of the cylinder, a grinding groove is opened in the grinding cylinder to cooperate with the grinding roller assembly for grinding the ore, a feeding pipe is provided at the top of the cylinder to conduct between the grinding cylinder and the grinding roller assembly, and a suction pipe is provided at the bottom of the cylinder to communicate with the powder chamber.

[0006] Furthermore, the clearance between the grinding roller assembly and the grinding cylinder gradually decreases from top to bottom.

[0007] Furthermore, an exhaust fan is connected to the top of the cylinder, and a dust-air separator is installed inside the cylinder at the air inlet of the exhaust fan.

[0008] Furthermore, the suction pipe is connected to a tee, the main tee is connected to a switch valve and a suction pump, and the branch tee is sealed with an air inlet plug.

[0009] Furthermore, a filter screen is installed inside the tee branch pipe.

[0010] Furthermore, the inner wall of the cylinder is provided with a guide plate for guiding the ore lifted by the exhaust fan to the space between the grinding cylinder and the grinding roller assembly.

[0011] Furthermore, a flexible slinger for dispersing materials is connected to the lower end of the grinding disc.

[0012] Furthermore, the flexible swivel disc is made of rubber.

[0013] This utility model has at least the following advantages and beneficial effects:

[0014] (1) Through the combined action of the revolution and rotation of the grinding roller group and the grinding groove inside the grinding cylinder, an annular crushing zone is formed to crush and grind the ore. Combined with the negative pressure suction of the suction pipe at the bottom of the cylinder, the powder is separated and collected, realizing the integration of grinding and separation, and avoiding dust pollution.

[0015] (2) Through multi-stage gap gradient grinding of the grinding roller group, large particles are avoided from directly impacting the small gap area, causing blockage or wear, thereby improving the uniformity of ore crushing and extending service life.

[0016] (3) By connecting a flexible slinger for dispersing materials to the lower end of the grinding disc, the powder is evenly sprinkled onto the screen, the powder is scattered, and the clumping is prevented, thus avoiding clogging of the motor drive. Attached Figure Description

[0017] Figure 1 This is a front view of a metal ore ring roller grinding device provided by the present invention.

[0018] Figure 2 A cross-sectional view of a metal ore ring roller grinding device provided by this utility model.

[0019] Figure 3 This utility model Figure 2 Sectional view along the AA direction.

[0020] Reference numerals: 1-Cylinder, 11-Grinding chamber, 12-Powder chamber, 13-Guide plate, 2-Screen, 3-Motor, 4-Grinding disc, 41-Rotating shaft, 42-Grinding roller assembly, 5-Grinding cylinder, 50-Grinding groove, 51-Connecting frame, 52-Flexible disc, 6-Feeding pipe, 61-Cap, 7-Exhaust fan, 71-Dust and gas separator, 8-Suction pipe, 81-T-connector, 82-Air inlet plug, 83-Filter screen. Detailed Implementation

[0021] The specific implementation method is described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figures 1 to 3As shown in the figure, this embodiment mainly discloses a metal ore ring roller grinding device, including a cylinder 1. The inside of the cylinder 1 is divided into a grinding chamber 11 and a powder chamber 12 by a screen 2. A motor 3 is provided on the screen 2. The motor 3 is rotatably connected to a grinding disc 4. Several rotating shafts 41 are evenly distributed around the grinding disc 4. A grinding roller group 42 is rotatably connected to the rotating shafts 41. A grinding cylinder 5 is provided on the inner wall of the grinding chamber 11 of the cylinder 1. A grinding groove 50 is opened in the grinding cylinder 5 to cooperate with the grinding roller group 42 for grinding the ore. A feeding pipe 6 is provided at the top of the cylinder 1 to conduct between the grinding cylinder 5 and the grinding roller group 42. A suction pipe 8 is provided at the bottom of the cylinder 1 to communicate with the powder chamber 12. Specifically, the interior of the cylinder 1 is divided into an upper grinding chamber 11 and a lower powder chamber 12 by a screen 2. The ore enters the grinding chamber 11 through the feed pipe 6. After grinding, the ore particles and powder fall onto the screen 2 under the action of gravity and the suction of the suction pipe 8. Powder meeting the particle size requirements passes through the screen 2 and is then drawn away by the suction pipe 8 through the powder chamber 12 to the subsequent collection device. It should be noted that the screen 2 is made of metal, possessing strong mechanical strength, capable of supporting the weight of the motor 3 and the grinding disc 4, ensuring operational stability, and also fulfilling the screening function. The grinding cylinder 5 is connected to the cylinder 1 via a radially outward-supporting connecting frame 51. The upper end of the grinding cylinder 5 exceeds the height of the grinding disc 4, ensuring that the ore can effectively and smoothly enter the gap between the grinding disc 4 and the grinding roller assembly 42. The feed pipe 6 is arranged in a conical ring with the top and upper part of the cylinder 1, and its outlet end is directly aligned with the annular gap between the grinding roller assembly 42 and the grinding cylinder 5, ensuring that the material accurately enters the grinding core area. During grinding, the grinding disc 4 is driven by the motor 3, which in turn drives the circumferentially distributed grinding roller group 42 to revolve. At this time, even if some ore falls to the top of the grinding disc 4 and does not fall into the gap, it will be thrown into the gap under the action of centrifugal force. Then, under the synergistic action of the rotation of the grinding roller group 42 and the grinding groove 50 inside the grinding cylinder 5, an annular crushing zone is formed, crushing the ore and causing it to fall step by step. It is then filtered through the screen 2, and combined with the negative pressure suction of the suction pipe 8 at the bottom of the cylinder 1, the powder is drawn away and collected through the powder chamber 12 by the suction pipe 8, reducing manual intervention and preventing dust from overflowing. The overall structure is compact, integrating grinding and separation.

[0024] Furthermore, in specific implementations, the clearance between the grinding roller assembly 42 and the grinding cylinder 5 provided in this embodiment of the present invention gradually decreases from top to bottom. For example, the grinding roller assembly 42 includes four coaxially arranged grinding rollers, and the ratio of the clearance values ​​between the four grinding rollers and the grinding ring from top to bottom is 4:3:2:1, forming a multi-stage grinding zone of "coarse crushing-medium crushing-fine crushing-fine grinding". The larger upper clearance is used for preliminary crushing of large pieces of ore, and the smaller lower clearance is used for fine grinding, avoiding large particles directly impacting the small clearance area and causing blockage or wear, reducing wear caused by instantaneous high load on the equipment, and extending its service life. Gradual crushing allows the ore to be gradually refined during the falling process, reducing over-grinding (i.e., excessive grinding of fine powder leading to energy waste), while ensuring the uniformity of the final product particle size, meeting the strict requirements of mineral processing experiments for fineness standards.

[0025] Furthermore, in a specific implementation, a flexible throwing disc 52 for dispersing materials is connected to the lower end of the grinding disc 4 provided in this embodiment of the present invention. Preferably, the flexible throwing disc 52 is made of rubber material, which has high elasticity and wear resistance. Specifically, the flexible throwing disc 52 rotates synchronously with the grinding disc 4, and under the action of centrifugal force, it evenly throws the powder towards the edge of the grinding chamber 11, avoiding uneven grinding caused by local accumulation. At the same time, it can disperse the powder and prevent clumping. In addition, the flexible throwing disc 52 can buffer the impact force of the ore, reduce equipment vibration and noise; and throw the ground ore away from the motor 3, avoiding blockage of the motor 3 transmission and extending the life of the transmission components. It should be noted that the flexible throwing disc 52 is arranged in a cylindrical or frustum-shaped state in a static state. The thickness of the flexible throwing disc 52 can gradually decrease from the center to the circumference, or deformation slits can be evenly opened at the edge. Its edge can deform under the action of centrifugal force, and the crushed material can be evenly thrown towards the screen 2, improving the uniformity of screening.

[0026] Example 2

[0027] like Figures 1 to 3 As shown, in this embodiment, the main structure is completely the same as in Embodiment 1. The difference is that an exhaust fan 7 is connected to the top of the cylinder 1, and a dust-air separator 71 is provided inside the cylinder 1 at the air inlet of the exhaust fan 7. Specifically, the dust-air separator 71 can be an air filter cartridge from the prior art.

[0028] Furthermore, in specific implementation, the suction pipe 8 provided in this embodiment of the utility model is connected to a tee 81. The main pipe of the tee 81 is connected to a switch valve and a suction pump, and the branch pipe of the tee 81 is sealed with an air inlet plug 82. Specifically, the exhaust fan 7 is always off during the normal grinding stage, and the negative pressure inside the cylinder 1 is only provided by the suction pipe 8. When a second return of material is required after the first grinding, the switch valve is closed and the exhaust fan 7 is turned on. That is, after the initial grinding of the ore, there are still many ore particles that do not meet the particle size requirements intercepted on the screen 2 inside the cylinder 1. At this time, a matching cap 61 needs to be installed at the top of the feeding pipe 6 to cover the feeding end of the feeding pipe 6 to prevent air from entering. Then, the switch valve is closed, the air inlet plug 82 and the exhaust fan 7 are opened, and the airflow enters the cylinder 1 through the branch pipe of the tee 81. The ore particles are lifted upward with the airflow and fall back into the gap between the grinding roller group 42 and the grinding disc 4 for secondary grinding, reducing manual intervention and raw material waste. It should be noted that the overall weight of the ore particles is relatively light, and the power of the exhaust fan 7 is sufficient to effectively lift the ore particles. The suction pipe 8 is arranged in a uniformly spaced circular pattern at the bottom of the cylinder 1, and the arrangement of the suction pipe 8 covers the loose material area of ​​the ore particles, ensuring effective lifting and avoiding the formation of dead zones.

[0029] Furthermore, in specific implementation, a filter screen 83 is provided inside the three-way branch pipe 81 provided in this utility model embodiment, which can effectively intercept air impurities from entering the cylinder 1 and avoid affecting the authenticity of the test.

[0030] Furthermore, in a specific implementation, the inner wall of the cylinder 1 provided in this embodiment of the present invention is provided with a guide plate 13 for guiding the ore lifted by the exhaust fan 7 to the grinding cylinder 5 and the grinding roller assembly 42. Specifically, the guide plate 13 is arranged in a ring along the inner wall of the cylinder 1, guiding the coarse particles lifted by the exhaust fan 7 to the grinding zone of the grinding roller assembly 42 and the grinding cylinder 5, realizing automatic recycling and re-crushing of coarse particles, avoiding manual return operations, and greatly improving the utilization rate of raw materials.

Claims

1. A metal ore ring roller grinding device, characterized by, The device includes a cylindrical body (1), which is divided into a grinding chamber (11) and a powder chamber (12) by a mesh screen (2). A motor (3) is installed on the mesh screen (2), and a grinding disc (4) is rotatably connected to the motor (3). Several rotating shafts (41) are evenly distributed around the grinding disc (4). A grinding roller assembly (42) is rotatably connected to the rotating shafts (41). A grinding cylinder (5) is provided on the inner wall of the grinding chamber (11) of the cylindrical body (1). A grinding groove (50) is opened in the grinding cylinder (5) to cooperate with the grinding roller assembly (42) for grinding ore. A feeding pipe (6) is provided at the top of the cylindrical body (1) to connect the grinding cylinder (5) and the grinding roller assembly (42). A suction pipe (8) is provided at the bottom of the cylindrical body (1) to communicate with the powder chamber (12).

2. A metal ore ring roller grinding device according to claim 1, characterized in that, The clearance between the grinding roller assembly (42) and the grinding cylinder (5) gradually decreases from top to bottom.

3. A metal ore ring roller grinding device according to claim 1, characterized in that, The top of the cylinder (1) is connected to an exhaust fan (7), and a dust-air separator (71) is provided inside the cylinder (1) at the air inlet of the exhaust fan (7).

4. A metal ore ring roller grinding device according to claim 3, characterized in that, The suction pipe (8) is connected to a tee (81), the main pipe of the tee (81) is connected to a switch valve and a suction pump, and the branch pipe of the tee (81) is sealed with an air inlet plug (82).

5. A metal ore ring roller grinding device according to claim 4, characterized in that, A filter screen (83) is installed inside the branch pipe of the tee (81).

6. A metal ore ring roller grinding device according to claim 3, characterized in that, The inner wall of the cylinder (1) is provided with a guide plate (13) for guiding the ore lifted by the blower (7) to the grinding cylinder (5) and the grinding roller group (42).

7. A metal ore ring roller grinding device according to claim 1, characterized in that, The lower end of the grinding disc (4) is connected to a flexible slinger (52) for dispersing materials.

8. A metal ore ring roller grinding device according to claim 7, characterized in that, The flexible swivel disc (52) is made of rubber.

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