A non-iron ore wet ball milling system and its online maintenance method

Abstract

This invention provides a non-ferrous ore wet ball milling system and its online maintenance method. The non-ferrous ore wet ball milling system includes a ball mill, a feed conveyor, a discharge conveyor, and an electromagnetic crane. The ball mill has a ball mill inlet, a tailings discharge outlet, and grinding balls. One end of the feed conveyor is connected to the ball mill inlet, the tailings discharge outlet is connected to one end of the discharge conveyor, and the other end of the discharge conveyor is connected to the other end of the feed conveyor. The online maintenance method for the non-ferrous ore wet ball milling system includes the step of screening out damaged grinding balls without stopping the ball mill. Using the technical solution of this invention, when screening out damaged grinding balls, the ball mill does not stop, the flow rate of grinding aid water decreases, and the material concentration inside the ball mill increases, causing crushed ore with a particle size of less than 20mm and damaged grinding balls to float to the surface simultaneously. The damaged grinding balls are then screened out by the electromagnetic crane, ensuring that the enterprise completes its production tasks on time and improving the enterprise's economic efficiency.

Description

Technical Field

[0001] This invention belongs to the field of ore processing equipment technology, and in particular to a wet ball milling system for non-ferrous ore and its online maintenance method. Background Technology

[0002] Ore crushing is a crucial process in the metallurgical and mining industries. Different crushing equipment is used depending on the required particle size of the product, and sometimes screening and other material selection steps are added. To meet the industry's particle size requirements, existing non-ferrous ore crushing generally uses overflow ball mills. Ball mills are mechanical devices that use internal grinding balls to impact and crush raw ore. During operation, the grinding balls continuously impact the raw ore, gradually becoming damaged and worn. Generally, when the particle size of the damaged grinding balls is less than 20mm, the crushing effect on the raw ore is minimal. Damaged grinding balls not only occupy internal space in the ball mill but also affect the grinding quality and efficiency. Therefore, damaged grinding balls should be promptly removed from the ball mill.

[0003] In the prior art, patent document with publication number "CN217856492U" discloses a steel ball screening device for a ball mill, including a support platform, a ball mill body mounted on the upper end of the support platform, a mounting frame placed on one side of the support platform, a belt conveyor mounted on the mounting frame, a conveying plate mounted on one end of the ball mill body via a flange, and a mounting plate placed on one end of the belt conveyor. This patented technology conveys steel balls from inside the ball mill body to the belt conveyor via the conveying plate. The belt conveyor then transports the steel balls to the steel screens between the mounting plates. Subsequently, steel balls of different sizes are sequentially screened through steel screens of different apertures and roll into the corresponding first collection hopper for collection, thus achieving the sorting of grinding balls. This patented technology uses a mechanized method to screen grinding balls, reducing labor intensity and saving maintenance time to some extent. However, when screening damaged grinding balls, the ball mill and related production equipment must be shut down, causing production stoppages and impacting the company's economic benefits. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a non-ferrous ore wet ball milling system and its online maintenance method.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides a wet ball milling system for non-ferrous ore, including a ball mill, a feed conveyor, a discharge conveyor, and an electromagnetic crane. The ball mill is provided with a ball mill inlet, a tailings discharge outlet, and grinding balls. One end of the feed conveyor is connected to the ball mill inlet, the tailings discharge outlet is connected to one end of the discharge conveyor, and the other end of the discharge conveyor is connected to the other end of the feed conveyor. The electromagnetic crane is arranged in parallel with the discharge conveyor.

[0007] The feed conveyor or discharge conveyor is a belt conveyor.

[0008] The non-ferrous ore wet ball milling system also includes a ground tank, a finished slurry tank, and a hydrocyclone. The hydrocyclone has a cyclone inlet, an overflow outlet, and an underflow outlet. The ball mill is also equipped with a slurry discharge port. The slurry discharge port and the cyclone inlet are respectively connected to the ground tank, the overflow outlet is connected to the finished slurry tank, and the underflow outlet is connected to the ball mill inlet.

[0009] The outer surface of the trench or finished slurry tank is also equipped with a stirring motor, and the output shaft of the stirring motor is also fixedly connected to the stirring blades, which are housed in the trench or finished slurry tank.

[0010] The output shaft of the stirring motor is arranged in a vertical direction.

[0011] Furthermore, the present invention also provides an online maintenance method for a non-ferrous ore wet ball mill system, comprising the following steps:

[0012] Step 1: Using the non-ferrous ore wet ball milling system as described above, the raw ore is continuously fed into the ball mill by the feed conveyor, and grinding aid water is continuously fed into the ball mill at the same time. The flow rate of the grinding aid water is Q0, so that the raw ore is crushed by the grinding balls, and the crushed ore with a particle size of less than 20mm is returned to the feed conveyor via the discharge conveyor.

[0013] Step 2: When needed by the user, the raw ore is continuously fed into the ball mill using the feed conveyor, and grinding aid water is continuously fed into the ball mill at the same time. The flow rate of the grinding aid water is Q1, and Q1 and Q0 satisfy the following relationship:

[0014]

[0015] The raw ore is crushed by the grinding balls. Crushed ore with a particle size of less than 20 mm and damaged grinding balls with a particle size of less than 20 mm are transferred via the discharge conveyor. After the damaged grinding balls are adsorbed and removed by the electromagnetic crane, the crushed ore with a particle size of less than 20 mm is returned to the feed conveyor.

[0016] The flow rate of the grinding aid water in step one is Q0 = 40m³.3 / h, the flow rate of the grinding aid water in step two is Q1 = 10m³ / h. 3 / h~15m 3 / h.

[0017] While performing step one or step two, the raw ore is crushed by the grinding balls. The crushed ore with a particle size greater than 20mm is mixed with grinding water to form a slurry. The slurry is collected in a trough and then sent to a hydrocyclone for screening. The slurry with a fineness of 100 mesh or more is collected in the finished slurry tank, and the remaining slurry is returned to the ball mill inlet.

[0018] The online maintenance method for the non-ferrous ore wet ball mill system also includes the following steps: when collecting slurry using a trough, continuously feeding screen-aiding water into the trough.

[0019] The flow rate of the screening aid water is Q2 = 80 m³ / s. 3 / h.

[0020] The beneficial effects of this invention are as follows: Using the technical solution of this invention, in the daily production activities of an enterprise, a feeding conveyor continuously feeds raw ore into the ball mill, while simultaneously continuously feeding grinding aid water into the ball mill. This causes the raw ore to be crushed by the grinding balls, and the crushed ore with a particle size less than 20mm is returned to the feeding conveyor via the discharge conveyor. Thus, the raw ore undergoes a closed-loop wet ball mill crushing process, effectively improving the grinding fineness and enhancing the crushing quality. When it is necessary to screen out damaged grinding balls, the feeding conveyor is still used to feed the ball mill... Raw ore is continuously fed into the ball mill, while grinding aid water is continuously supplied. The ball mill is kept running, and the flow rate of the grinding aid water decreases, thereby increasing the material concentration inside the ball mill. This allows crushed ore with a particle size of less than 20mm and damaged grinding balls with a particle size of less than 20mm to float out simultaneously and be transferred by the discharge conveyor. Since the crushed ore is non-ferrous ore, damaged grinding balls can be easily and conveniently screened out using an electromagnetic crane. During the screening process of damaged grinding balls, the ball mill never stops, ensuring that the company completes its production tasks on time and improving the company's economic benefits. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the non-ferrous ore wet ball milling system of the present invention.

[0022] In the diagram: 1-ball mill, 2-feed conveyor, 3-discharge conveyor, 4-electromagnetic crane, 5-ground trough, 6-finished slurry trough, 7-cyclone separator, 8-mixing motor, 9-mixing blade. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] like Figure 1As shown, this invention provides a wet ball milling system for non-ferrous ore, including a ball mill 1, a feed conveyor 2, a discharge conveyor 3, and an electromagnetic crane 4. The ball mill 1 is provided with a ball mill inlet, a tailings discharge outlet, and grinding balls. One end of the feed conveyor 2 is connected to the ball mill inlet, the tailings discharge outlet is connected to one end of the discharge conveyor 3, and the other end of the discharge conveyor 3 is connected to the other end of the feed conveyor 2. The electromagnetic crane 4 is arranged parallel to the discharge conveyor 3. The electromagnetic crane 4 is used to adsorb and remove damaged grinding balls.

[0025] By adopting the technical solution of this invention, in the daily production activities of an enterprise, raw ore is continuously fed into the ball mill 1 by the feed conveyor 2, and grinding aid water is continuously fed into the ball mill 1 at the same time, so that the raw ore is crushed by the grinding balls. The crushed ore with a particle size of less than 20mm is returned to the feed conveyor 2 via the discharge conveyor 3. Thus, the raw ore undergoes a closed-loop wet ball mill crushing process, which effectively improves the grinding fineness and enhances the crushing quality. When it is necessary to screen out damaged grinding balls, the feed conveyor 2 is still used to continuously feed the raw ore into the ball mill 1. The raw ore is fed into the ball mill 1, and grinding aid water is continuously fed into the ball mill 1 without stopping the ball mill 1. The flow rate of the grinding aid water decreases, thereby increasing the material concentration in the ball mill 1. This allows crushed ore with a particle size of less than 20mm and damaged grinding balls with a particle size of less than 20mm to float out simultaneously and be transferred by the discharge conveyor 3. Since the crushed ore is non-ferrous ore, the damaged grinding balls can be easily and conveniently screened out using an electromagnetic crane 4. During the screening process of damaged grinding balls, the ball mill 1 never stops, ensuring that the company completes its production tasks on time and improving the company's economic benefits.

[0026] Specifically, the feed conveyor 2 or the discharge conveyor 3 is a belt conveyor. The non-ferrous ore wet ball mill system also includes a trough 5, a finished slurry tank 6, and a hydrocyclone 7. The hydrocyclone 7 has a cyclone inlet, an overflow outlet, and an underflow outlet. The ball mill 1 is also equipped with a slurry discharge port. The slurry discharge port and the cyclone inlet are respectively connected to the trough 5, the overflow outlet is connected to the finished slurry tank 6, and the underflow outlet is connected to the ball mill inlet. A stirring motor 8 is also installed on the outer surface of the trough 5 or the finished slurry tank 6. The output shaft of the stirring motor 8 is also fixedly connected to the stirring blades 9, which are housed within the trough 5 or the finished slurry tank 6. The output shaft of the stirring motor 8 is arranged vertically. When the ball mill 1 is running, the raw ore is crushed by the grinding balls. The crushed ore with a particle size greater than 20mm is mixed with the grinding water to form a slurry. The slurry is collected by the trough 5 and then sent to the hydrocyclone 7 for screening. The slurry with a fineness of 100 mesh or more is collected by the finished slurry trough 6, and the remaining slurry is returned to the ball mill inlet. The flow of the slurry forms a closed loop, which further improves the grinding fineness and is conducive to improving the crushing quality.

[0027] In addition, the present invention also provides a non-ferrous ore wet ball milling system and its online maintenance method, comprising the following steps:

[0028] Step 1: Using the non-ferrous ore wet ball milling system as described above, the raw ore is continuously fed into the ball mill 1 by the feed conveyor 2, and grinding aid water is continuously fed into the ball mill 1 at the same time. The flow rate of the grinding aid water is Q0, so that the raw ore is crushed by the grinding balls. The crushed ore with a particle size of less than 20mm is returned to the feed conveyor 2 via the discharge conveyor 3.

[0029] Step 2: When needed by the user, the raw ore is continuously fed into the ball mill 1 using the feed conveyor 2, and grinding aid water is continuously fed into the ball mill 1 at the same time. The flow rate of the grinding aid water is Q1, and Q1 and Q0 satisfy the following relationship:

[0030]

[0031] The raw ore is crushed by grinding balls. Crushed ore with a particle size of less than 20 mm and damaged grinding balls with a particle size of less than 20 mm are transferred via discharge conveyor 3. After the damaged grinding balls are picked up and removed by electromagnetic crane 4, the crushed ore with a particle size of less than 20 mm is returned to feed conveyor 2.

[0032] By adopting the technical solution of this invention, in the daily production activities of an enterprise, raw ore is continuously fed into the ball mill 1 by the feed conveyor 2, and grinding aid water is continuously fed into the ball mill 1 at the same time, so that the raw ore is crushed by the grinding balls. The crushed ore with a particle size of less than 20mm is returned to the feed conveyor 2 via the discharge conveyor 3. Thus, the raw ore undergoes a closed-loop wet ball mill crushing process, which effectively improves the grinding fineness and enhances the crushing quality. When it is necessary to screen out damaged grinding balls, the feed conveyor 2 is still used to continuously feed the raw ore into the ball mill 1. The raw ore is fed into the ball mill 1, and grinding aid water is continuously fed into the ball mill 1 without stopping the ball mill 1. The flow rate of the grinding aid water decreases, thereby increasing the material concentration in the ball mill 1. This allows crushed ore with a particle size of less than 20mm and damaged grinding balls with a particle size of less than 20mm to float out simultaneously and be transferred by the discharge conveyor 3. Since the crushed ore is non-ferrous ore, the damaged grinding balls can be easily and conveniently screened out using an electromagnetic crane 4. During the screening process of damaged grinding balls, the ball mill 1 never stops, ensuring that the company completes its production tasks on time and improving the company's economic benefits.

[0033] Specifically, in step one, the flow rate of the grinding aid water is Q0 = 40m³. 3 / h, the flow rate of the grinding aid water in step two is Q1 = 10m 3 / h~15m 3 / h. While performing step one or step two, the raw ore is crushed by grinding balls. Crushed ore with a particle size greater than 20mm is mixed with grinding aid water to form a slurry. The slurry is collected using the trough 5 and then sent to the hydrocyclone 7 for screening. Slurry with a fineness of 100 mesh or higher is collected using the finished slurry trough 6, and the remaining slurry is returned to the ball mill inlet. The online maintenance method for the non-ferrous ore wet ball mill system also includes the following steps: When collecting slurry using the trough 5, continuously feed screening aid water into the trough 5. The screening aid water flow rate is Q2 = 80m³ / h. 3 / h. By adopting the technical solution of this invention, the flow of slurry forms a closed loop, which further improves the grinding fineness and is beneficial to improving the crushing quality.

Claims

1. A method for online maintenance of a non-ferrous ore wet ball mill system, characterized in that: Includes the following steps: Step 1: Use a non-ferrous ore wet ball milling system, which includes a ball mill (1), a feed conveyor (2), a discharge conveyor (3), and an electromagnetic crane (4). The ball mill (1) is equipped with a ball mill inlet, a tailings discharge outlet, and grinding balls. One end of the feed conveyor (2) is connected to the ball mill inlet, the tailings discharge outlet is connected to one end of the discharge conveyor (3), and the other end of the discharge conveyor (3) is connected to the other end of the feed conveyor (2). The electromagnetic crane (4) is arranged in parallel with the discharge conveyor (3). The feed conveyor (2) continuously feeds raw ore into the ball mill (1), and simultaneously continuously feeds grinding aid water into the ball mill (1). The flow rate of the grinding aid water is... The raw ore is crushed by the grinding balls, and the crushed ore with a particle size of less than 20 mm is returned to the feed conveyor (2) via the discharge conveyor (3). Step 2: When needed by the user, the raw ore is continuously fed into the ball mill (1) using the feed conveyor (2), and grinding aid water is continuously fed into the ball mill (1) at the same time. The flow rate of the grinding aid water is... ,and , The following relationship is satisfied: ； The raw ore is crushed by the grinding balls. When the flow rate of the grinding water decreases, the material concentration in the ball mill (1) increases, so that crushed ore with a particle size of less than 20 mm and damaged grinding balls with a particle size of less than 20 mm can float out at the same time. The crushed ore with a particle size of less than 20 mm and the damaged grinding balls with a particle size of less than 20 mm are transferred by the discharge conveyor (3). After the damaged grinding balls are adsorbed and removed by the electromagnetic crane (4), the crushed ore with a particle size of less than 20 mm is returned to the feed conveyor (2). While performing step one or step two, the raw ore is crushed by the grinding balls. The crushed ore with a particle size greater than 20 mm is mixed with grinding water to form a slurry. The slurry is collected by the trough (5) and then sent to the hydrocyclone (7) for screening. The slurry with a fineness of 100 mesh or more is collected by the finished slurry trough (6), and the remaining slurry is returned to the ball mill inlet.

2. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 1, characterized in that: The flow rate of the grinding aid water in step one The flow rate of the grinding aid water in step two .

3. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 1, characterized in that: The online maintenance method for the non-iron ore wet ball mill system also includes the following steps: when collecting slurry using the trough (5), continuously feed screen aid water into the trough (5).

4. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 3, characterized in that: The flow rate of the screening aid water is: .

5. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 1, characterized in that: The feeding conveyor (2) or discharging conveyor (3) is a belt conveyor.

6. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 1, characterized in that: The non-iron ore wet ball milling system also includes a ground trough (5), a finished slurry tank (6) and a hydrocyclone (7). The hydrocyclone (7) has a swirling inlet, an overflow outlet and an underflow outlet. The ball mill (1) is also provided with a slurry discharge port. The slurry discharge port and the swirling inlet are respectively connected to the ground trough (5), the overflow outlet is connected to the finished slurry tank (6), and the underflow outlet is connected to the ball mill inlet.

7. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 6, characterized in that: The outer surface of the trench (5) or the finished slurry tank (6) is also equipped with a stirring motor (8), and the output shaft of the stirring motor (8) is also fixedly connected to the stirring blade (9), which is housed in the trench (5) or the finished slurry tank (6).

8. The online maintenance method for a non-ferrous ore wet ball mill system as described in claim 7, characterized in that: The output shaft of the stirring motor (8) is arranged in a vertical direction.

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