Device for reducing over-grinding of materials of mining roller type comminutor

Abstract

The utility model discloses a device for reducing over-grinding of materials of a mining roller type comminutor, which belongs to the field of ore crushing and grinding processing and comprises a basic retaining ring component fixedly connected to the edge of a rotary millstone, and the basic retaining ring component and the rotary millstone are relatively static; the auxiliary material blocking ring assembly is fixedly connected to the inner wall of the middle shell, and the auxiliary material blocking ring assembly is arranged above the basic material blocking ring assembly; the auxiliary retaining ring assembly and the rotary grinding disc rotate relatively; the two auxiliary material blocking ring assemblies respectively extend to the far end of the rotary millstone along the near end of the grinding roller; a discharging opening is formed between the two auxiliary material blocking ring assemblies, and the discharging opening facilitates discharging of ground materials; according to the utility model, through the dynamic and static combined design of the double-layer retaining ring, and meanwhile, the notch is formed in the static retaining ring, so that materials which are not ground are blocked and conveyed to the grinding roller for grinding, and all the ground materials are discharged and sorted, and the problems of repeated grinding and excessive grinding of the materials are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ore crushing and grinding processing technical field, especially relate to a device for reducing over-grinding of material of mine roller mill. BACKGROUND

[0002] The ore processing needs to be broken and ground according to the requirement of dressing equipment to ore, and the main equipment currently includes crusher, ball mill and roller mill. The roller mill is widely used because of its material bed grinding, large processing capacity and high efficiency. However, the material bed needs a certain thickness to maintain the stability of grinding, and the material exists the problem of multiple grinding. Due to multiple grinding, the fineness of the material is too fine, which increases the grinding power consumption on the one hand, and on the other hand, it is difficult to select the metal or non-metal ore in the ore after over-grinding, which reduces the subsequent dressing efficiency. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides a device for reducing over-grinding of material of mine roller mill.

[0004] The utility model is realized in this way, a device for reducing over-grinding of material of mine roller mill, the mine roller mill includes middle casing, the rotary mill disc is arranged in the middle casing, and the rotary mill disc rotates under the drive of motor; the rotary mill disc edge extends upwards and is arranged as an annular boss, and the annular boss is fixedly connected with a basic material baffle ring; the grinding roller support is symmetrically arranged on the outer side of the middle casing, the rocker arm is hinged to the grinding roller support, the other end of the rocker arm is arranged in the middle casing, and the other end is connected with the grinding roller, and the grinding roller rotates along the rocker arm; the feed pipe is arranged through the side wall of the middle casing, and the discharge port of the feed pipe is arranged above the rotary mill disc, for feeding new material to the rotary mill disc;

[0005] The fixed material baffle ring is fixedly connected to the inner wall of the middle casing, and the fixed material baffle ring is arranged above the basic material baffle ring; the number of the auxiliary material baffle ring assemblies is consistent with the number of the grinding rollers, and each auxiliary material baffle ring assembly is arranged from the proximal end of the grinding roller to the distal end of the grinding roller, and the discharge port is formed between each auxiliary material baffle ring assembly.

[0006] Further, the outer side of the fixed material baffle ring is provided with a fixed plate, the fixed plate is provided with a plurality of strips, and the fixed plate connects the fixed material baffle ring to the inner wall of the middle casing.

[0007] Further, the outer side of the fixed material baffle ring is provided with a fixed plate, the fixed plate is provided with a plurality of strips, and the fixed plate connects the fixed material baffle ring to the inner wall of the middle casing.

[0008] Further, the inner diameter of the fixed material blocking ring is larger than that of the base material blocking ring, and the outer diameter of the fixed material blocking ring is smaller than that of the base material blocking ring, so as to adjust the distance between the fixed material blocking ring and the base material blocking ring.

[0009] Further, the height of the adjusting material blocking ring is 20-150 mm.

[0010] Further, the adjusting material blocking ring is connected to the two end portions of the fixed material blocking ring through bolts.

[0011] Further, the adjusting material blocking ring can be arranged on both of the material discharge ports, or on one of the material discharge ports, or not arranged.

[0012] Further, after the fixed material blocking ring is fixedly connected to the inner wall of the middle shell, the first installation size is 100-300 mm, and the second installation size is 200-500 mm, so as to facilitate the discharge of the ground material with different particle sizes.

[0013] The utility model has the advantages and technical effects:

[0014] 1. The utility model discloses a double-layer material blocking ring dynamic and static combination design, and the material is blocked to convey to the grinding roller grinding on the static material blocking ring notch, and the ground material is discharged and sorted, and the problem of multiple grinding and over-grinding is reduced.

[0015] 2. The position and size of the notch of the material blocking ring control the grinding frequency of the material and discharge in time. It can meet the grinding demand of different materials and has wide adaptability.

[0016] 3. The utility model discloses simple operation, quick adjustment and wide application. DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is the top view of the utility model;

[0019] Figure 3 It is the Figure 1 middle B-B view of the utility model;

[0020] Figure 4 It is the Figure 1 middle C local enlarged view of the utility model;

[0021] Figure 5 It is the local schematic view of the utility model after installing and adjusting the material blocking ring.

[0022] In the figure: 1, middle shell; 2, grinding roller; 3, rocker arm; 4, grinding roller support; 5, auxiliary material blocking ring assembly; 6, fixed plate; 7, basic material blocking ring assembly; 8, rotating grinding disc; 9, feed pipe; 10, adjusting material blocking ring; 11, discharge port; 12, annular boss; 13, basic material blocking ring; 14, material blocking piece; L1, first mounting size; L2, second mounting size; L3, height. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0024] The conventional material blocking structure of the roller type crushing mill is provided with a basic material blocking ring assembly 7 integrated with the grinding disc on the outside of the grinding disc to form a stable material layer. The height of the basic material blocking ring assembly 7 is 100-200mm. The material on the rotating grinding disc 8 is blocked by the basic material blocking ring assembly 7. Because the upper layer of material moves faster and the lower layer of material moves slower, and the new feeding material is generally in the upper layer, the material is thrown out after being ground by the grinding roller, and the lower layer is blocked by the basic material blocking ring assembly 7 and enters the next grinding roller to be crushed again, which causes the material to be repeatedly ground and the material to be overground. In order to improve the grinding efficiency, it is usually tried to reduce the height of the basic material blocking ring assembly 7. However, after the height of the basic material blocking ring assembly 7 is reduced, the thickness of the material layer is too thin, the crushing mill vibrates greatly and cannot run.

[0025] In view of the above problems, the utility model provides a device for reducing overgrinding of material of a mine roller type crushing mill. Figures 1 to 5 For example, two grinding rollers, because the roller type crushing mill involved is prior art, therefore, only the structure of the relevant part of the utility model is shown in the drawing.

[0026] The mine roller type crushing mill comprises a middle shell 1, the middle shell 1 is fixed on a grinding roller support 4, the grinding roller support 4 is fixed on a ground foundation, the middle shell 1 wraps the grinding structure in the middle, and plays a sealing and protection role.

[0027] A rotating grinding disc 8 is arranged in the middle shell 1, the rotating grinding disc 8 is driven to rotate by a motor reducer arranged at the lower part of the rotating grinding disc 8, a feed pipe 9 is arranged through the side wall of the middle shell 1, the discharge port of the feed pipe 9 is arranged obliquely downward above the rotating grinding disc 8, and the arrangement position of the feed pipe 9 is perpendicular to the rocker arm 3; the material falls on the rotating grinding disc 8 through the feed pipe 9, because the rotating grinding disc 8 rotates continuously, the material is uniformly scattered, a dynamic material bed is formed on the upper surface of the rotating grinding disc 8 under the action of centrifugal force, and finally the material is thrown out to the outside of the rotating grinding disc 8.

[0028] The middle shell 1 is symmetrically provided with a grinding roller support 4, and a rocker arm 3 is hinged on the grinding roller support 4. The other end of the rocker arm 3 is arranged in the middle shell 1, and the other end is fixedly connected with the center rotating shaft of the grinding roller 2. The rocker arm 3 is arranged to be inclined to the upper surface of the rotary grinding disc 8, so that the grinding roller 2 is pressed on the rotary grinding disc 8. Under the driving of the rotary grinding disc 8, the grinding roller 2 rotates along the center rotating shaft, and then the material on the rotary grinding disc 8 is crushed to form a material bed.

[0029] The rotary grinding disc 8 is fixedly provided with a basic material blocking ring assembly 7. The basic material blocking ring assembly 7 includes a basic material blocking ring 13. The edge of the rotary grinding disc 8 is arranged to be an annular boss 12. The upper end surface of the annular boss 12 is provided with a notch. The notch is used for clamping the basic material blocking ring 13, so as to fix the basic material blocking ring 13 on the rotary grinding disc 8. That is, the basic material blocking ring assembly 7 rotates with the rotary grinding disc 8. The annular boss 12 can make the basic material blocking ring 13 bear a larger force, which is used to bear the extrusion of the basic material blocking ring 13 by the grinding roller 2 during grinding. The surface of the basic material blocking ring 13 is machined to ensure the flatness of the surface, which is beneficial to the discharge of the ground material. According to different types of ores and particle sizes of raw materials, the height of the basic material blocking ring 13 is designed to be 30-60mm, which is greatly reduced compared with the height of the traditional material blocking ring. The material is easily discharged.

[0030] In order to ensure the stability of the grinding roller, a second layer of material blocking ring, that is, an auxiliary material blocking ring assembly 5, is designed. The auxiliary material blocking ring assembly 5 is arranged above the basic material blocking ring assembly 7. The auxiliary material blocking ring assembly 5 is arranged to be two, which are arranged at the distal end of the grinding roller 2 from the proximal end of the grinding roller 2, that is, from the upper side of the grinding roller 2 to the discharge side of the grinding roller 2 along the rotation direction of the rotary grinding disc 8. Two first notches 10 are formed between the two auxiliary material blocking ring assemblies 5, which are beneficial to the discharge of the ground material.

[0031] The auxiliary material blocking ring assembly 5 includes a material blocking piece 14. The outer side of the material blocking piece 14 is welded with a fixed plate 6. The number of the fixed plate 6 is preferably arranged to be four. The four fixed plates 6 are radially distributed between the auxiliary material blocking ring assembly 5 and the middle shell 1, and the auxiliary material blocking ring assembly 5 is welded in the middle shell 1.

[0032] The inner diameter of the material baffle 14 is larger than the inner diameter of the base material baffle 13, and the outer diameter of the material baffle 14 is smaller than the outer diameter of the base material baffle 13, so as to adjust the distance between the auxiliary material baffle assembly 5 and the base material baffle assembly 7; the purpose of such arrangement is to project the material baffle 14 inside the outer circle of the base material baffle 13, so as to ensure that the maximum gap between them is the vertical gap; if the material baffle 14 projects outside the base material baffle 13, there is a misalignment between the two, and the vertical gap is not the maximum gap, the misaligned gap is larger than the vertical gap, which causes too much material to be discharged from the misaligned gap. The height of the bottom surface of the auxiliary material baffle assembly 5 from the top surface of the base material baffle assembly 7 is set to 3-15mm, and the distance between the two is as small as possible without scratching. The height of the material baffle 13 is set to 150-300mm, and the height is selected to be higher without interfering with the grinding roller 2.

[0033] The two auxiliary material baffle assemblies 5 are welded to the middle shell 1, and a discharge port 11 can be formed between the auxiliary material baffle assemblies 5 after welding. The discharge port 11 is artificially arranged on the side of the material after being crushed by the grinding roller 2, and the crushed material is discharged in time through the discharge port 11. By adjusting the position and size of the discharge port 11, the discharge of materials with different fluidity and different finished product fineness requirements can be met. At the same time, according to the grinding condition of the material, an adjusting material baffle 10 can be installed on one of the discharge ports 11. The two ends of the adjusting material baffle 10 are respectively fixedly connected to the adjacent ends of the two auxiliary material baffle assemblies 5 through bolts. By replacing the adjusting material baffles 10 with different heights, the height of the discharge port 11 is adjusted to control the discharge efficiency of the material.

[0034] Further, the number of grinding rollers 2 can be set to two, three or four.

[0035] The design principle of the utility model is described as follows: taking a mill with a grinding disc diameter of 2600mm as an example, the raw material feeding particle size is 50mm, the finished product material fineness requirement is relatively fine, and the R80 micron sieve residue is within 10%. In order to meet the above-mentioned grinding material particle size requirement, the new feeding material needs to be ground twice by the grinding roller to achieve a good finished product rate. Therefore, the installation parameter settings of the auxiliary material blocking ring assembly 5 are as follows: the height of the basic material blocking ring assembly 7 is designed to be 40mm, the first installation size L1 is designed to be 250mm, the second installation size L2 is designed to be 400mm, and the adjusting material blocking ring height L3 is designed to be 20mm; the auxiliary material blocking ring assembly 5 is welded in the middle shell 1, and the adjusting material blocking ring 10 is installed on the first discharge port 11 in the rotation direction of the rotating grinding disc 8 from the feeding pipe 9; when the new feeding material starts to be ground, the new feeding material is first ground by the first grinding roller 2 under the driving of the rotating grinding disc 8, and the fine powder generated by grinding is discharged to a part outside the rotating grinding disc 8 through the gap in the upper part of the adjusting material blocking ring 10, the content of the qualified finished product with the particle size of the discharged part is relatively high, and the remaining material not discharged is blocked by the basic material blocking ring assembly 7 and the auxiliary material blocking ring assembly 5 and continuously conveyed to the next grinding roller for grinding, and the material ground again is discharged from the discharge port 11 without the adjusting material blocking ring 10; through the setting of the structure, the finished product requirement of the ground material is met, and the material is ground multiple times, thereby reducing the waste of working hours.

[0036] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for reducing over-grinding of materials in a mining roller mill, the mining roller mill comprising a middle shell (1), a rotating grinding disc (8) being arranged in the middle shell (1), and the rotating grinding disc (8) being rotated by a motor; a grinding roller support (4) being symmetrically arranged on the outer side of the middle shell (1), a rocker arm (3) being hinged on the grinding roller support (4), the other end of the rocker arm (3) being arranged in the middle shell (1), and the other end being connected to a grinding roller (2), and the grinding roller (2) rotating along its own rotation axis; a feed pipe (9) being provided through the side wall of the middle shell (1), the discharge port of the feed pipe (9) being arranged above the rotating grinding disc (8), and being used for feeding new material onto the rotating grinding disc (8); the device is characterized in that: A basic retaining ring assembly (7) is fixedly connected to the edge of the rotating grinding disc (8), and the basic retaining ring assembly (7) and the rotating grinding disc (8) are relatively stationary; it also includes an auxiliary retaining ring assembly (5) fixedly connected to the inner wall of the middle shell (1), and the auxiliary retaining ring assembly (5) is arranged above the basic retaining ring assembly (7); the auxiliary retaining ring assembly (5) and the rotating grinding disc (8) rotate relatively; the number of the auxiliary retaining ring assemblies (5) is consistent with the number of the grinding rollers (2), and they are respectively extended from the proximal end of the grinding roller (2) to the distal end of the grinding roller (2), that is, from the upper side of the feeding of the grinding roller (2) along the rotation direction of the rotating grinding disc (8) to the discharge side of the grinding roller (2); a discharge port (11) is formed between each of the auxiliary retaining ring assemblies (5), and the discharge port (11) facilitates the discharge of the ground material.

2. The device for reducing over-grinding of materials in a mining roller mill according to claim 1, characterized in that: It also includes an adjusting retaining ring (10), which is detachably connected to the adjacent ends of the two auxiliary retaining ring assemblies (5) and is used to adjust the height of the discharge port (11).

3. The device for reducing over-grinding of materials in a mining roller mill according to claim 2, characterized in that: The basic retaining ring assembly (7) comprises a basic retaining ring (13), and the basic retaining ring (13) is fixedly connected to an annular boss (12) extending upward from the edge of the rotating grinding disc (8).

4. The device for reducing over-grinding of materials in a mining roller mill according to claim 3, characterized in that: The auxiliary material stop ring assembly (5) comprises a material stop piece (14), a fixing plate (6) is provided on the outside of the material stop piece (14), and the fixing plate (6) connects the auxiliary material stop ring assembly (5) to the inner wall of the middle shell (1).

5. The device for reducing over-grinding of materials in a mining roller mill according to claim 4, characterized in that: The inner diameter of the blocking piece (14) is larger than the inner diameter of the basic blocking ring (13), and the outer diameter of the blocking piece (14) is smaller than the outer diameter of the basic blocking ring (13), so as to facilitate adjustment of the distance between the auxiliary blocking ring assembly (5) and the basic blocking ring assembly (7).

6. The device for reducing over-grinding of materials in a mining roller mill according to claim 2, characterized in that: The adjusting retaining ring (10) is connected to the ends of the two auxiliary retaining ring assemblies (5) via bolts.

7. The device for reducing over-grinding of materials in a mining roller mill according to claim 6, characterized in that: The regulating retaining ring (10) is arranged on one of the discharge openings (11), or is not arranged.

8. The device for reducing over-grinding of materials in a mining roller mill according to claim 7, characterized in that: The height (L3) of the regulating retaining ring is 20 to 150 mm.

9. The device for reducing over-grinding of materials in a mining roller mill according to claim 3, characterized in that: The height of the basic retaining ring (13) is 30 to 60 mm.

10. The device for reducing over-grinding of materials in a mining roller mill according to claim 4, characterized in that: The height of the blocking piece (14) is 150 to 300 mm.

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