Square sand setting box of cyclone of combined flow control ball mill

Abstract

The utility model aims to solve the problems that an existing sand settling square box is easy to wear and leak due to directional scouring of ore pulp and is inconvenient to maintain, and provides a sand settling square box of a combined flow control ball mill cyclone. The sand setting square box comprises an upper box body, a main box body and a rectification inner sleeve, the box body of the desilting square box is changed from a cuboid into a big-end-down concentric stacked tower type layout, the upper part is the transition square sleeve, the lower part is the main box body, and the structure prevents ore pulp entering the square box from scouring the inner wall of the lower box body. And the slag discharging door and the maintenance access are arranged, so that maintenance is convenient. Therefore, damage to the sand setting square box is reduced, and the service life of the sand setting square box is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mine dressing equipment, in particular to a cyclone sand settling square box. BACKGROUND

[0002] The currently used cyclone sand settling square box of the ball mill is a cuboid box with the size of 600x600x1500mm, the cyclone sand settling slurry is injected into the box through the 600x600mm open top of the box body, and the slurry flows out from the ∮351mm discharge pipe connected to the side wall of the lower part of the box body and then enters the ball mill.

[0003] However, the existing cyclone sand settling square box has the following problems:

[0004] 1. The structure of the cyclone sand settling square box is too simple, and the injected slurry cannot be effectively controlled, so the slurry often forms directional erosion to the inner wall of the box, thereby causing local rapid wear and leakage.

[0005] 2. The cyclone sand settling square box is too narrow and is designed in a sealed manner, so if the inner box of the box body has local wear and leakage, internal reinforcement cannot be used to solve the problem, and only external repair can be used (repairing the leakage), which has poor maintenance effect, and the repeated leakage and new wear of the parts make the overall service life of the cyclone sand settling square box shorter, with an average of 18 months.

[0006] 3. The replacement of the square box requires a long shutdown and a series of problems, which reduces the operation efficiency of the equipment. SUMMARY

[0007] The utility model discloses a cyclone sand settling square box of a combined flow control ball mill, which solves the problems of easy wear and leakage due to directional erosion of the slurry and inconvenient maintenance of the existing cyclone sand settling square box. The box body of the cyclone sand settling square box is changed from a cuboid to a tower type layout with a large lower part and a small upper part, the upper part is a transition square sleeve, and the lower part is a main box body. This structure avoids the slurry entering the square box from eroding the inner wall of the lower box body. A slag discharge door and a maintenance entrance are arranged, which facilitates maintenance. Thus, the damage of the cyclone sand settling square box is reduced, and the service life of the cyclone sand settling square box is prolonged.

[0008] A cyclone sand settling square box of a combined flow control ball mill, comprising an upper box body, a main box body and a rectifier inner sleeve.

[0009] The upper box body is a rectangular pipe, the upper part of the upper box body is located in the cyclone sand settling groove, the outer wall of the upper box body is sealingly connected to the cyclone sand settling groove, and the lower part of the upper box body is inserted into the main box body.

[0010] The top of the main box body is provided with an opening sealingly connected to the outer wall of the lower part of the upper box body, and the front side plate of the main box body is provided with a discharge pipe connecting hole.

[0011] The rectifier inner sleeve is funnel-shaped, and the outer diameter of the top opening of the funnel is the same as the length of the inner wall of the upper box. The top opening of the rectifier inner sleeve extends outward to form a fixed outer edge for support at the top of the upper box.

[0012] Furthermore, in the aforementioned combined flow-controlled ball mill hydrocyclone settling box, a maintenance inlet / outlet is provided on the rear side plate of the main box body, a baffle is provided on the outside of the maintenance inlet / outlet, and a ring is provided on the inside of the baffle that matches the inner diameter of the maintenance inlet / outlet, so that the baffle forms a plug structure.

[0013] Furthermore, in the aforementioned combined flow-controlled ball mill hydrocyclone settling box, the center point of the maintenance inlet / outlet is located on the center line of the side plate.

[0014] Furthermore, in the aforementioned combined flow-controlled ball mill hydrocyclone settling box, a slag discharge port is provided on the left or right side plate of the main box body, a baffle is provided on the outside of the slag discharge port, and a ring matching the inner diameter of the slag discharge port is provided on the inside of the baffle, so that the baffle forms a plug structure.

[0015] Furthermore, in the aforementioned combined flow-controlled ball mill hydrocyclone settling box, the bottom end of the rectifying inner sleeve is lower than the bottom end of the upper box body.

[0016] Furthermore, the aforementioned combined flow control ball mill hydrocyclone settling box has a wear-resistant material coating on the inner surface of the rectifying inner sleeve, the bottom of the main box, and the inner surface extending from the bottom of the main box to the upper edge of the discharge pipe connection hole.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] 1. The box body was changed from a cuboid to a concentric stacked tower layout with a smaller top and a larger bottom. The upper part is a transitional square sleeve, and the lower part is the main box body. This structure prevents the slurry entering the square box from washing against the inner wall of the lower box body.

[0019] 2. A concentric funnel-shaped sleeve is added inside the upper transition square sleeve. This serves two purposes: firstly, it effectively controls the ore flow injected into the square box, causing the slurry to fall in a rotating manner (like the rotating state of water in a toilet), thus preventing localized rapid wear caused by the directional scouring of the slurry. Secondly, the sleeve and the upper transition square sleeve form a dual structure that effectively improves wear resistance.

[0020] 3. Compared to the original box, the length, width and overall height of the lower box have been increased, which allows personnel to operate inside the box. At the same time, the thickness of the sediment at the bottom of the box has been increased, which strengthens the protection of the bottom of the box.

[0021] 4. The main ore box is equipped with a maintenance entrance and a slag discharge port. During scheduled maintenance, the sediment and debris in the ore box can be drained, and then personnel can enter the box through the maintenance entrance to carry out inspection and reinforcement work.

[0022] 5. The system reduces the number of shutdowns for welding repairs caused by leakage by an average of 4.5 times per year, and the total shutdown time is ≥10 hours. It is expected to have the same service life as the ball mill hydrocyclone as the whole, ≥15 years, reducing the long-term shutdown problem when replacing the square box (replacing it requires a 72-hour shutdown), and significantly improving the equipment operating rate. Attached Figure Description

[0023] Figure 1 1. Right sectional view of the sedimentation box of this utility model;

[0024] Figure 2 A front view and cross-sectional view of the sedimentation box of this utility model;

[0025] Among them, 1. Upper box body, 2. Main box body, 3. Rectifier inner sleeve, 4. Hydrocyclone sedimentation tank, 5. Maintenance inlet / outlet, 6. Slag discharge port, 7. Ore discharge pipe connection hole, 8. Wear-resistant material coating. Detailed Implementation

[0026] Example 1

[0027] A combined flow-controlled ball mill hydrocyclone settling box includes an upper box 1, a main box 2, and a rectifier inner sleeve 3;

[0028] The upper box is a rectangular through pipe. The upper part of the upper box is located at the bottom of the hydrocyclone sedimentation tank 4. The outer wall of the upper box is sealed to the hydrocyclone sedimentation tank. The lower part of the upper box is inserted into the main box.

[0029] The top of the main box is provided with an opening that is sealed to the outer wall of the lower part of the upper box. The front side plate of the main box is provided with a ore discharge pipe connection hole 7. The rear side plate of the main box is provided with a maintenance inlet / outlet 5. A baffle is provided on the outside of the maintenance inlet / outlet. A ring matching the inner diameter of the maintenance inlet / outlet is provided on the inside of the baffle, so that the baffle forms a plug structure. The center point of the maintenance inlet / outlet is located on the center line of the side plate. The left or right side plate of the main box is provided with a slag discharge port 6. A baffle is provided on the outside of the slag discharge port. A ring matching the inner diameter of the slag discharge port is provided on the inside of the baffle, so that the baffle forms a plug structure.

[0030] The rectifier inner sleeve is funnel-shaped, and the outer diameter of the top opening of the funnel is the same as the length of the inner wall of the upper box. The top opening of the rectifier inner sleeve extends outward to form a fixed outer edge for supporting the top of the upper box. The bottom of the rectifier inner sleeve is lower than the bottom of the upper box.

[0031] A wear-resistant material coating 8 is provided on the inner surface of the rectifier inner sleeve, the bottom of the main housing, and the inner surface from the bottom of the main housing to the upper edge of the discharge pipe connection hole.

[0032] The working principle of this device is as follows: After the slurry flows into the rectifying inner sleeve, it is compressed by the funnel-shaped change in diameter. The slurry at the front is propelled by the continuous flow of the slurry at the rear, causing it to rotate and fall, entering the lower main ore box. The space suddenly increases, the flow rate slows down, and it is smoothly discharged from the ore discharge pipe connected to the reserved hole of the discharge pipe as an overflow. Due to the increased height of the box, the thickness of the sediment at the bottom of the box increases to nearly 400mm, effectively resisting the impact of the falling slurry on the interior of the ore box. During each scheduled maintenance, only the blind plate of the slag discharge port needs to be opened to drain the sediment and impurities in the sediment box. Then, the main box can be accessed through the maintenance inlet / outlet to perform inspection, confirmation, and reinforcement of worn parts. Through the scheduled maintenance and cyclical reinforcement of the rectifying inner sleeve and the main box, zero leakage and long service life of the sediment box can be achieved, meeting the production needs of long cycle and high operating rate of the equipment. In addition, the wear-resistant material coating can further reduce the wear of the slurry on the rectifying inner pipe and the main box.

Claims

1. A combined flow control ball mill cyclone grit chamber, characterised in that, The utility model relates to a cyclone dust collector, which comprises an upper box, a main box and a rectifying inner sleeve. The upper box is a rectangular through pipe, and the upper part of the upper box is located in a grit channel of a cyclone, and the outer wall of the upper box is sealingly connected with the grit channel. The top of the main box is provided with an opening sealingly connected with the outer wall of the lower part of the upper box, and the front side plate of the main box is provided with a discharge pipe connecting hole. The rectifying inner sleeve is funnel-shaped, the outer diameter of the top opening of the funnel is the same as the length of the inner wall of the upper box, and the top opening of the rectifying inner sleeve extends outward to form a fixed outer edge for supporting on the top of the upper box.

2. The combined flow control ball mill cyclone grit chamber according to claim 1, characterized in that, The rear side plate of the main box is provided with a maintenance access, the outer side of the maintenance access is provided with a baffle, and the inner side of the baffle is provided with a circular ring matched with the inner diameter of the maintenance access, so that the baffle forms a plug structure.

3. The combined flow control ball mill cyclone grit chamber according to claim 2, characterized in that, The center point of the maintenance access is located on the center line of the side plate.

4. The combined flow control ball mill cyclone grit chamber according to claim 1, characterized in that, The left or right side plate of the main box is provided with a slag discharge port, the outer side of the slag discharge port is provided with a baffle, and the inner side of the baffle is provided with a circular ring matched with the inner diameter of the slag discharge port, so that the baffle forms a plug structure.

5. The combined flow control ball mill cyclone grit chamber according to claim 1, characterized in that, The bottom end of the rectifying inner sleeve is lower than the bottom end of the upper box.

6. The combined flow control ball mill cyclone grit chamber according to claim 1, characterized in that, A wear-resistant material coating is arranged on the inner surface of the rectifying inner sleeve, the bottom of the main box, and the height from the bottom of the main box to the upper part of the discharge pipe connecting hole.

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