Feeding arrangement for a magnetic separator for mining

Abstract

The utility model relates to mine wet type magnetic separator feeding equipment technical field, namely mine magnetic separator feeding mine device. Install a piece of goods board between the ore feeding chute and the magnetic separator feeding box, and the goods board is fixed in the magnetic separator feeding box, and the upper end is exposed from the magnetic separator feeding box. The goods board is made of two opposite steel plates, magnetic blocks in the middle and angle steels welded and fixed around. Set the goods board and its adjustable frame body in front of the ore feeding chute, when the goods board or the magnetic separator feeding box body is worn, the gap between the two is adjusted by using the lead screw, the size of the ore feeding granularity is controlled, the more than 50mm ore is avoided to mix into the grinding ore, and the abnormal wear of the magnetic separator drum is reduced. The structure is simple, the effect of protecting the magnetic separator feeding box is good, and the service life of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of feeding equipment for wet magnetic separators in mines, namely, feeding and welcoming devices for magnetic separators in mines. Background Technology

[0002] In existing technologies, since most of my country's mines produce low-grade iron ore, a process of multiple crushing and less grinding is generally adopted to improve the grade of the ore entering the mill. This means that after the ore arrives at the beneficiation plant, large pieces of ore are crushed by crushers, and valuable minerals are initially selected by magnetic drums. Since the particle size of the ore cannot be reached in a single crushing process, it also needs to go through medium crushing, fine crushing, and screening processes before the qualified valuable minerals can be sent to the ball mill for processing. In order to reduce costs, the finer the ore entering the mill and the higher the grade, the better. Therefore, an additional process is added before entering the ball mill, namely wet waste disposal, to further improve the grade of the ore entering the mill. In short, the minerals fed into the ball mill are washed with water. The benefits of water washing are that it removes the mud and dust from the ore, discards the ore whose magnetic iron content does not meet the requirements, and also reduces the diffusion of dust, thereby improving the grade of the ore entering the mill and reducing the beneficiation ratio. The so-called wet waste disposal method involves installing a mining magnetic separator, mixing ore and water, and then flushing the mixed ore into the magnetic separator's feed box with water. The water's fluidity carries the mixture to the bottom box for separation. The magnetic drum discharges the usable ore to the discharge area, which then enters the ball mill for further processing. Waste rock or ore with low magnetic iron content enters the tailings chute, undergoes dewatering, and is then transported away to the waste rock bin. Due to the constraints of the crusher's discharge size, the feed particle size to the ball mill is generally around 12mm-15mm. Sometimes, when there is a malfunction in the crushing and screening process (e.g., broken screens causing the feed particle size to exceed 25mm-60mm), the separation gap between the magnetic separator's drum and the bottom box is 50mm. To improve the separation effect, the gap is usually adjusted to 40mm-50mm. When the ore entering the mill is larger than 50mm, the ore will cause abnormal wear on the magnetic separator's drum, directly leading to drum damage and ultimately causing the magnetic separator to become unusable. Meanwhile, when the ore mixture enters the magnetic separator feed box, the impact of the mixture directly causes wear on the box body, which will lead to the bottom box being scrapped after long-term operation. Utility Model Content

[0003] The purpose of this utility model is to provide a mining magnetic separator feeding and receiving device that has a simple structure and good protection for the magnetic separator drum and feed box, in order to address the above-mentioned shortcomings.

[0004] The technical solution of this utility model is: a ore receiving device for a mining magnetic separator, wherein a receiving plate is installed between the ore feeding chute and the ore feeding box of the magnetic separator, the receiving plate is fixed inside the ore feeding box of the magnetic separator, and the upper end protrudes from the ore feeding box of the magnetic separator; the receiving plate is made of two opposing steel plates, with a magnetic block sandwiched in the middle and angle steel welded around the perimeter.

[0005] The receiving plate is mounted on an adjustable frame via two spaced screws, and the adjustable frame is connected to the ore feed chute; the front ends of the two spaced screws pass through the receiving plate, and limit nuts are screwed onto the screws at the front and rear of the receiving plate.

[0006] The advantages of this utility model are:

[0007] This device uses a wet magnetic separator for waste disposal with particles larger than 10mm, which can meet the waste disposal requirements of different models of magnetic separators.

[0008] A receiving plate and its adjustable frame are installed in front of the feed chute. When the receiving plate or the feed box of the magnetic separator wears, the gap between the two is adjusted by the screw to control the size of the feed particle size, thus preventing ore larger than 50mm from entering the bottom box of the magnetic separator and reducing abnormal wear on the magnetic separator drum.

[0009] 3. The design is reasonable, the structure is simple and compact, it is easy to install, the price is low, it saves materials, the screening effect is good, it reduces the occurrence of scrap accidents of magnetic separator drum and box caused by large ore particles, reduces maintenance labor intensity, and reduces production cost output.

[0010] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram showing the usage state of this utility model.

[0013] Figure 3 yes Figure 2 Side view diagram.

[0014] The parts in the diagram are named as follows: 1. Iron plate; 2. Hole; 3. Angle steel; 4. Magnetic block; 5. Lead screw; 6. Nut; 7. Feed chute; 8. Magnetic separator feed box; 9. Cargo receiving plate. Detailed Implementation

[0015] See Figure 1 , 23. The ore-receiving device for the mining magnetic separator consists of a receiving plate 9 installed between the ore-feeding chute 7 and the magnetic separator feed box 8. This prevents material from directly impacting the magnetic separator feed box 8. The adjustable gap between the ore-feeding chute 7 and the receiving plate 9 limits the entry of material blocks larger than the gap into the magnetic separator feed box 8. The receiving plate 9 is fixed inside the magnetic separator feed box 8, with its upper end protruding from the box. The receiving plate 9 is constructed from two opposing steel plates 1, with a magnetic block 4 sandwiched in between, and fixed around the perimeter with angle steel 3. The receiving plate 9 is mounted on an adjustable frame via two spaced screws 5, which are connected to the ore-feeding chute 7. The front ends of the two spaced screws 5 pass through the receiving plate 9, and limit nuts 6 are screwed onto the screws 5 before and after the receiving plate 9. Adjusting the position of the nut 6 at the rear of the receiving plate 9 adjusts the gap between the ore-feeding chute 7 and the receiving plate 9 (see...). Figure 3 ). Figure 2 The drawing method on the right side omits one lead screw 5.

[0016] The receiving plate 9 is constructed to reduce the flow rate of the ore mixture, thus minimizing wear on the magnetic separator feed box 8. After the conveyor belt feeds the ore into the feed chute 7, the ore is evenly distributed by the separating device. Water then propels the ore into the magnetic separator feed box 8. The impact of the water causes wear on the feed box 8. The receiving plate 9, installed between the feed chute 7 and the magnetic separator feed box 8, reduces the wear on the feed box 8. The size of the receiving plate 9 is determined based on the dimensions of the magnetic separator feed box 8. For example, in the CTS-1550 magnetic separator, if the bottom box of the feed box 8 is 5m long, the length of the receiving plate 9 should be 5m, and its height should be slightly higher than the height of the feed chute 7. If the height of the CTS-1550 magnetic separator feed chute 7 is 300mm, the height of the receiving plate 9 should be 400mm. A key consideration for the receiving plate 9 is its wear resistance. First, two 5000mm x 400mm steel plates (10mm steel plate 1) are cut from each plate. One plate is then covered with magnetic blocks (4), and the other plate is aligned with it, using the magnetism of the blocks (4) to firmly hold it in place. Finally, angle steel (3) is welded around the edges to secure it, thus completing the receiving plate (9). Second, an adjustable frame is constructed for the receiving plate (9) and the feed chute (7). Due to the uncertainty of the feed particle size, to screen out large pieces of ore, we need to adjust the gap between the receiving plate (9) and the feed chute (7). A gap that is too large is ineffective, while a gap that is too small causes clogging and prevents normal production. Because the receiving plate (9) is heavy, it is first lifted up, and then the gap between the receiving plate (9) and the feed chute (7) is adjusted using a screw (5) to ensure that the gap is sufficient to effectively screen out large pieces of ore and reduce abnormal wear on the magnetic separator drum.

[0017] Two steel plates 1, each 5000mm x 400mm in size, are made from A3 steel plates with a thickness of 10mm. Two Ø32 holes 2 are drilled at 100mm from both ends of the steel plates 1. Then, one of the steel plates 1 is covered with magnetic blocks 4, and the other steel plate 1 is aligned with it. The magnetic blocks 4 are used to hold the plates together firmly. Finally, the plates are fixed by welding angle steel 3 around the edges.

[0018] Two M30×300mm lead screws 5 are machined. Four 50mm angle steels 3 are welded into the feed box 8 of the magnetic separator, 100mm from the bottom. The receiving plate 9 is hoisted into the feed box 8 and supported by the four welded 50mm angle steels. A 30mm nut 6 is then screwed onto the lead screw 5. One end of the lead screw 5 with the nut 6 is passed through the hole 2 in the receiving plate 9, and the other end of the lead screw 5 is welded to the side of the feed chute 7. Similarly, the other lead screw 5 is welded to the other side of the feed chute 7. Two more 30mm nuts 6 are then installed on the lead screws 5 that pass through both ends of the receiving plate 9. The lead and limit of the threads can then be used to control the distance between the receiving plate 9 and the end face of the feed chute 7. Once the distance to the receiving plate 9 is adjusted, the relative movement of the two nuts 6 can fix the receiving plate 9. When the end face of the receiving plate 9 or the feed chute 7 wears, the nuts 6 can be loosened to adjust the distance.

[0019] Working principle: When the ore mixture passes through the receiving plate 9, the magnetic blocks 4 installed inside the receiving plate 9 attract small ore particles, forming a protective layer. As the thickness of the protective layer increases, the magnetic field strength weakens, and the attracted ore gradually decreases, eventually determining the thickness of the protective layer. When the mixture is continuously fed into the feed chute 7, the ore continuously impacts and grinds the protective layer. When the magnetic field strength is strong enough to overcome the impact, ore particles are continuously attracted, ensuring the thickness of the protective layer. This creates a grinding effect, reducing ore mixing. The ore mixture wears down on the receiving plate 9. Due to the pressure of the water, the ore mixture is impacted and blocked by the receiving plate 9, thus reducing the flow rate of the ore mixture. This prevents the ore mixture from causing abnormal wear on the magnetic separator feed box 8. At the same time, when the distance between the receiving plate 9 and the end face of the feed chute 7 is adjusted to about 40mm by adjusting the screw 5 and nut 6, ore particles larger than 50mm will be stuck and will not enter the magnetic separator feed box 8 if there is a malfunction in the crushing and screening. This will prevent abnormal wear on the magnetic separator drum.

[0020] The above description is merely a specific embodiment of this utility model, and the various examples do not constitute a limitation on the substantive content of this utility model.

Claims

1. A feeding and receiving device for a mining magnetic separator, characterized in that... A receiving plate (9) is installed between the ore feed chute (7) and the magnetic separator feed box (8). The receiving plate (9) is fixed inside the magnetic separator feed box (8), with the upper end protruding from the magnetic separator feed box (8). The receiving plate (9) is made of two opposing steel plates (1), with a magnetic block (4) sandwiched in the middle and angle steel (3) welded around it.

2. The ore feeding and welcoming device for a mining magnetic separator according to claim 1, characterized in that... The receiving plate (9) is installed on an adjustable frame via two spaced screws (5), and the adjustable frame is connected to the ore feeding chute (7); the front ends of the two spaced screws (5) pass through the receiving plate (9), and limit nuts (6) are screwed on the screws (5) before and after the receiving plate (9).

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