A rough sand isolation screen device for overflow classification of a grinding hydrocyclone

Abstract

The utility model provides a kind of rough sand isolation screen device of overflow classification of grinding hydraulic cyclone, solve the problem of current screenless interception device.It includes isolation screen sand box, cyclone overflow ore pulp pipeline, overflow pump pool guide pipeline and screen plate, isolation screen sand box is divided into screenless area and screen area, screen area isolation screen sand box wall is equipped with screen frame, screen plate is detachably installed on isolation screen sand box through screen frame, cyclone overflow ore pulp pipeline is located above isolation screen sand box, overflow pump pool guide pipeline is installed at the bottom of isolation screen sand box, screen plate screen hole is not greater than 6mm through sand particle.The utility model screen plate is installed quickly through dovetail groove guide rail of screen frame, then screen plate is fixed eccentric lock screen plate, screen plate is detachable, maintenance efficiency is improved, modular design makes single screen plate replacement time shorten;Interception reliability, actual measurement intercepts 6mm above particle efficiency is remarkable, and downstream pump valve wear rate decreases.

Description

Technical Field

[0001] This utility model relates to the field of copper-cobalt ore beneficiation technology, and in particular to a device for intercepting and isolating coarse sand particles during the overflow classification process of a grinding hydrocyclone, specifically a modular screen device that can be quickly replaced. Background Technology

[0002] Changes in ore properties can lead to variations in feed pressure and flow rate due to impeller wear in the hydrocyclone feed pump, damage to the hydrocyclone underrun nozzle, wear and breakage of the mill drum screen, or detachment of the bimetallic wear-resistant layer from the hydrocyclone feed pipe clogging the underrun nozzle. These factors can result in the introduction of coarse ore particles larger than 6mm into the overflow liquid (commonly known as "coarse run-in"). This coarse sand severely damages downstream equipment, such as the agitator blades of the external mixing tank of the raw ore thickener, the blades of the leaching tank, the flow parts of the transfer pump, and the blades of the external mixing tank of the CCD thickener, causing wear and deformation.

[0003] The overflow slurry from the hydrocyclone to the downstream section lacks a screen interception device in the current design. Coarse sand causes equipment failures such as deformation of the downstream mixing blades, wear of the conveying pump flow parts, and damage to the speed reducer, resulting in extremely high repair costs for each failure. Utility Model Content

[0004] This utility model provides a coarse sand isolation screen device for overflow grading in a grinding hydrocyclone, which solves the problem of the current lack of screen interception devices.

[0005] This utility model is achieved through the following technical solution: A coarse sand isolation screen device for overflow grading of a hydrocyclone includes an isolation screen sand box, a hydrocyclone overflow slurry pipe, an overflow pump pool guide pipe, and a screen plate. The isolation screen sand box is divided into a screenless area and a screen area. A screen frame is provided on the wall of the isolation screen sand box in the screen area. The screen plate is detachably installed on the isolation screen sand box through the screen frame. The hydrocyclone overflow slurry pipe is located above the isolation screen sand box. The overflow pump pool guide pipe is installed at the bottom of the isolation screen sand box. The screen holes of the screen plate allow sand particles no larger than 6mm to pass through.

[0006] The sieve plate consists of multiple pieces, and the sieve plates are locked together by a sieve plate fixing eccentric wheel.

[0007] The isolation screen sand box has a width of 2m, a length of 2.4m, and a height of 1.5m; the area without screen plates has a size of 1.2m * 2.0m; there are 8 screen plates with a size of 600mm × 500mm × 6mm, and 4 screen plates in the central area.

[0008] The sieve holes are a rectangular array of 6mm×10mm, with an opening rate of 40%±2%.

[0009] The sieve plate is made of a polyurethane-steel skeleton composite structure.

[0010] The inner wall of the sieve hole is provided with a 5° taper for drainage.

[0011] The inner wall and surface of the sieve are coated with a tungsten carbide coating with a thickness of 80 μm.

[0012] The sieve frame is equipped with a dovetail groove guide rail.

[0013] The dovetail groove guide rail has a groove depth of 20mm and an inclination angle of 15°.

[0014] This utility model's screen plate is quickly installed via the dovetail groove guide rail of the screen frame, and then locked with a screen plate fixing eccentric wheel. The screen plate is detachable, improving maintenance efficiency. The modular design shortens the replacement time of a single screen plate. It has reliable interception, and actual tests show that it has a significant efficiency in intercepting particles larger than 6mm, reducing the wear rate of downstream pumps and valves. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Top view; In the diagram: 1. Isolation screen sand box; 2. Area without screen in the sand box; 3. Hydrocyclone overflow slurry pipe; 4. Dovetail groove guide rail (screen frame for installing screen plate); 5. Screen plate fixing eccentric wheel; 6. Screen plate; 7. Overflow pump pool guide pipe. Detailed Implementation

[0016] like Figure 1 , 2 As shown, this utility model is a modular and quick-replaceable screen device. The coarse-particle ore grading and isolation screen sand box 1 is 2m wide, 2.4m long, and 1.5m high. It solves the problem of equipment wear caused by coarse sand running from the hydrocyclone. At the same time, it achieves: the replacement time of a single screen plate 6 is ≤15 minutes, the interception rate of coarse sand with a particle size >6mm is high, and the anti-clogging design enables a long continuous operation cycle.

[0017] (1) Modular screen plate assembly: 8 independent screen plates are distributed in three zones, with screen plate specifications of 600mm×500mm×6mm, and 4 screen plates in the central zone. The screen holes are 6mm×10mm rectangular arrays with an opening rate of 40%±2%. The screen plate material is a polyurethane-steel skeleton composite structure with a high wear resistance index.

[0018] (2) Quick-installation system: The screen frame is equipped with a dovetail groove guide rail 4 with a groove depth of 20mm and an inclination angle of 15°. The screen plate is locked by a screen plate fixing eccentric wheel 5 clamping device.

[0019] (3) Anti-clogging optimization design: The inner wall of the sieve hole 6 is set with a 5° taper for drainage. The surface is coated with an 80μm thick tungsten carbide coating.

[0020] (4) Overflow control system: There is a flow channel below the screen surface. The slurry under the screen is guided to the overflow pump pool through the overflow pump pool guide pipe 7. The total size of the screen area is 1.2m*2.0m, and the size of the screenless area is 1.2m*2.0m, which is the overflow area when the screen plate is blocked.

[0021] The working process of this utility model: 1. The overflow slurry from the hydrocyclone enters the isolation screen area through slurry pipe 3. The slurry flow rate is 280-320 m³ / h, and the working pressure is 0.15-0.25 MPa.

[0022] 2. The slurry is isolated and intercepted by 4 screen plates in the central area, and slurry particles with screen holes smaller than 6mm pass through the screen plates and enter the guide channel below the screen plates.

[0023] 3. The undersized slurry enters the hydrocyclone overflow pump pool through the overflow pump pool guide pipe 7, and the qualified slurry is transported to the next process.

[0024] in: The grading sand box measures 2m wide, 2.4m long, and 1.5m high. The total dimensions of the screen area are 1.2m x 2.0m, and the dimensions of the area without a screen plate are also 1.2m x 2.0m. If coarse sand clogs the screen plate, the slurry will overflow into the sand box. In the area without a screen (2), the slurry enters the guide channel below the screen plate. The screen plate (6) can be dynamically cleaned using specialized tools, or a thorough cleaning of coarse sand and interception of foreign objects can be performed when the machine is stopped.

[0025] The sieve plate 6 is quickly installed via the dovetail groove guide rail 4 of the sieve frame, and then locked with the sieve plate fixing eccentric wheel 5. The sieve plate is detachable. This improves sieve plate maintenance efficiency, and the modular design shortens the replacement time for a single sieve plate. It also enhances interception reliability; actual tests show significant efficiency in intercepting particles larger than 6mm, and reduces wear on downstream pumps and valves. Example: To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0026] Install the main frame below the overflow port of the hydrocyclone. The sand box has dimensions of 2000mm×2400mm×1500mm. Insert the eight screen plates in the central area along the dovetail groove guide rail in sequence, lock them with the screen plate fixing eccentric wheel, and install the side wing screen plates vertically.

[0027] The overflow slurry from the hydrocyclone enters the isolation screen area through the slurry pipe. In this area, coarse sand is isolated and intercepted. Slurry particles smaller than 6mm through the screen plate enter the guide channel below the screen plate, and finally enter the hydrocyclone overflow pump pool through the overflow pump pool guide pipe, transporting the qualified slurry to the subsequent process. If large particles of sand clog the screen plate, the slurry will overflow into the sand box. In the area without a screen, it enters the guide channel below the screen plate. Operators can dynamically clean the screen plate using specialized tools, or thoroughly clean the coarse sand and intercepted foreign objects when the machine is stopped. If the screen plate wears to a certain extent and breaks, it can be quickly installed using the dovetail groove guide rail of the screen frame during downtime, and then locked in place using an eccentric wheel clamping device.

Claims

1. A coarse sand isolation screen device for overflow classification in a grinding hydrocyclone, characterized in that: It includes an isolation screen sand box, a hydrocyclone overflow slurry pipe, an overflow pump pool guide pipe, and a screen plate. The isolation screen sand box is divided into a screenless area and a screen area. The screen area has a screen frame on the wall of the isolation screen sand box. The screen plate is detachably installed on the isolation screen sand box through the screen frame. The hydrocyclone overflow slurry pipe is located above the isolation screen sand box. The overflow pump pool guide pipe is installed at the bottom of the isolation screen sand box. The screen plate holes allow sand particles no larger than 6mm to pass through.

2. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The sieve plate consists of multiple pieces, and the sieve plates are locked together by a sieve plate fixing eccentric wheel.

3. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 2, characterized in that: The isolation screen sand box has a width of 2m, a length of 2.4m, and a height of 1.5m; the screenless area has a size of 1.2m*2.0m; there are 8 screen plates with a size of 600mm×500mm×6mm, and 4 screen plates in the central area.

4. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The sieve holes are a rectangular array of 6mm×10mm, with an opening rate of 40%±2%.

5. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The sieve plate is made of a polyurethane-steel skeleton composite structure.

6. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The inner wall of the sieve hole is provided with a 5° taper for drainage.

7. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The inner wall and surface of the sieve are coated with a tungsten carbide coating with a thickness of 80 μm.

8. The overflow classification coarse sand isolation screen device for a grinding hydrocyclone according to claim 1, characterized in that: The screen frame is equipped with a dovetail groove guide rail, and the screen plate is installed in the dovetail groove guide rail.

9. A coarse sand isolation screen device for overflow classification of a grinding hydrocyclone according to claim 8, characterized in that: The dovetail groove guide rail has a groove depth of 20mm and an inclination angle of 15°.

Images