CN202087414U - Dry magnetic separation equipment for coarse-particle magnetite - Google Patents

Abstract

The utility model relates to a dry-type magnet separator specifically discloses a coarse grain magnetite dry-type magnetic separation equipment, include: a frame; the magnetic cylinder is arranged on the rack; the magnetic system is arranged in the magnetic cylinder, and the magnetic system and the magnetic cylinder respectively and independently rotate; the steering roller is arranged on the rack and is connected with the magnetic cylinder through a belt; the feeding mechanism is arranged on the rack and is positioned above the belt; and the receiving hopper is arranged on the rack and is positioned below the belt. The utility model provides an equipment can improve magnetic mineral's rate of recovery, and the gangue of mixing in the material is fully isolated.

Description

Coarse magnetite dry magnetic separation equipment

technical field

The utility model relates to a dry-type magnetic separator, in particular to a coarse-grained magnetite dry-type magnetic separator.

Background technique

At present, domestic large and medium-sized iron ore dressing plants usually use cone crushers or hammer crushers as fine crushing equipment to crush ores. The particle size of the obtained crushed ore products is generally -25mm, and some large-scale concentrators control the particle size at -12mm. For materials with these particle sizes, dry magnetic separation equipment is usually used to separate and recover the magnetic minerals.

The dry magnetic separation equipment is mainly a magnetic drum or a magnetic pulley, which is usually used for the removal of large pieces of surrounding rock and the surrounding rock after medium crushing, and the pre-selection of restoring geological grades. The index is good, but for the finely crushed materials containing some fine-grained powder ore, the separation effect is not good. The main performance is that some gangues are mixed in the coarse concentrate, and some recyclable magnetic minerals are contained in the tailings. For low-grade magnetite, due to the low magnetic substance content, large gangue content, and some fine particles and fine ore, the separation effect is even worse.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is how to improve the recovery rate of the finely crushed coarse magnetic minerals and fully separate the gangue mixed in the material.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a coarse-grained magnetite dry magnetic separation equipment, comprising:

frame;

The magnetic cylinder is arranged on the frame;

The magnetic system is arranged in the magnetic cylinder, and the magnetic system and the magnetic cylinder rotate independently;

The steering drum is arranged on the frame and connected with the magnetic cylinder through a belt;

The feeding mechanism is arranged on the frame and above the belt;

The receiving hopper is arranged on the frame and is located below the belt.

Wherein, the wrap angle of the magnetic system is 360 degrees.

The pole surface width of the magnetic pole group of the magnetic system is 65-255mm.

Further, the magnetic system includes magnetic pole groups arranged alternately in the circumferential direction of N and S poles, and the total number of the magnetic pole groups is an even number.

The magnetic system uses a permanent magnetic material as a magnetic source.

The magnetic source includes NdFeB and ferrite magnetic materials.

The shell of the magnetic cylinder is made of non-magnetic material.

In a further technical solution, the feeding mechanism includes:

The hopper is arranged on the frame and above the belt;

The feeder is arranged on the frame and is located below the feeding hopper.

The feeder is a motor vibrating feeder or an electromagnetic vibrating feeder.

The hopper includes a non-magnetic material hopper and a magnetic material hopper, which are respectively fixed on the frame by bolts and separated by a separation plate.

It also includes: a tensioning device, connected with the frame and the steering drum, for adjusting the distance between the steering drum and the magnetic drum.

It also includes: a box body, which is arranged on the frame and forms a closed space with the receiving hopper.

The magnetic drum and the steering drum are respectively fixed on the frame through respective bearing seats.

(3) Beneficial effects

The above technical scheme has the following beneficial effects: firstly, by adopting a full magnetic system with a 360-degree wrap angle and a small pole surface magnetic pole structure, the gradient of the magnetic field is increased and the adsorption force is enhanced, which is conducive to the full recovery of magnetic minerals and improves the magnetic properties of magnetic minerals. Recovery rate;

Secondly, by adopting the dual-rotation design of the shell of the magnetic cylinder and the magnetic system, the number of turnovers of the magnetic particles is dozens of times that of conventional magnetic separation equipment, which is conducive to fully throwing out the gangue mixed in the material;

Thirdly, by adopting the conveying method of belt conveying materials, while reducing the wear of the tube skin, the materials can be fully dispersed, and it is also conducive to the unloading of the magnetic minerals that are adsorbed;

Moreover, through the combination of the full magnetic system structure and the belt conveying method, a pre-magnetization space is formed, and the fine-grained magnetic minerals are pre-magnetized and form a magnetic chain after entering the magnetic field, which improves the recovery rate of magnetic materials in powder ore;

Finally, after sorting by using the dry magnetic separation equipment provided by the utility model, the gangue inclusions in the rough concentrate are less, the content of magnetic iron in the sorting tailings is lower, and the sorting index is obviously better than the traditional Dry magnetic separation equipment. It is suitable for dry pre-selection and throwing of tailings before the coarse-grained magnetite enters the mill, or for dry separation of iron ore with a lot of powder ore, and can also be used for magnetite old tailings, river sand and steel slag Dry comprehensive recycling of iron ore resources.

Description of drawings

Fig. 1 is the structural representation of the coarse magnetite dry type magnetic separation equipment of the utility model embodiment;

Fig. 2 is an enlarged view of part of the structure in Fig. 1 .

Among them, 1: rack; 2: box; 3: magnetic cylinder; 31: magnetic system; 4: belt; 5: hopper; 6: feeder; 7: steering drum; 8: non-magnetic material receiving hopper; 9: mining board; 10: magnetic material receiving hopper; 11: tensioning device.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figure 1, the dry magnetic separation equipment for coarse-grained magnetite in the embodiment of the present invention comprises: frame 1, casing 2, magnetic cylinder 3, belt 4, feeding mechanism, turning drum 7, non-magnetic material Hopper 8, mining board 9, magnetic material hopper 10, tensioning device 11.

Among them, the frame 1 is a frame structure, which is welded by channel steel and angle steel, and is used to support various components of the entire dry magnetic separation equipment.

The box body 2, the non-magnetic material receiving hopper 8 and the magnetic material receiving hopper 10 form a relatively closed space. The box body 2 is installed on the frame 1, and is used to prevent the dust generated in the sorting process from being dispersed in the air.

As shown in Figure 2, the core component magnetic system 31 of this dry magnetic separation equipment is arranged inside the magnetic cylinder 3, and the magnetic cylinder 3 is fixed on the frame 1 by its own bearing seat (not shown in the figure), and the magnetic cylinder 3 The shell of the cylinder is made of non-magnetic metal or non-metallic material; the magnetic system 31 is installed inside the magnetic cylinder 3, and the two rotate independently, powered by different mechanical structures. The magnetic system 31 is composed of magnetic pole groups arranged alternately in the circumferential direction of N and S poles. The magnetic system 31 uses permanent magnetic materials as the magnetic source, such as NdFeB or ferrite magnetic materials, or NdFeB and ferrite Composite magnetic material composed of solid body; the magnetic system wrap angle is 360 degrees full magnetic system structure, the magnetic pole group of the magnetic system 31 has a pole surface with a width of 65-255mm, and the total number of magnetic pole groups is an even number. The rotation directions of the magnetic system 31 and the magnetic cylinder 3 can be set to be the same or opposite according to actual needs. In Fig. 2, the arrow outside the magnetic cylinder 3 represents the turning direction of the magnetic cylinder 3, and the arrow inside the magnetic cylinder 3 represents the turning direction of the magnetic system 31. The magnetic cylinder 3 and the magnetic system 31 of the present embodiment turn to the opposite direction, and the rotational speed of the magnetic system 31 and the magnetic system 31 are opposite. The direction is controlled by a tuner (not shown in the figure).

The feeding mechanism includes a feeding hopper 5, which is arranged on the frame 1 and is located above the belt 4. It may also include: a feeder 6, which is arranged on the frame 1 and located below the hopper 5, and the feeder 6 is a motor vibrating feeder or an electromagnetic vibrating feeder.

The steering drum 7 is also fixed on the frame 1 through its own bearing housing (not shown), and is connected with the magnetic cylinder 3 by the belt 4 , specifically, the belt 4 is sleeved on the magnetic cylinder 3 and the steering drum 7 . The hopper 5 is arranged above the belt 4 and is used to transport the material into the feeder 6 . The arrows on the belt 4 in Fig. 2 indicate the material conveying direction. The feeder 6 of the present embodiment is a motor vibrating feeder, and the material that enters from the hopper 5 falls evenly onto the belt 4 under the vibration of the feeder 6, and the belt 4 is used to transport the material that falls from the feeder 6. of materials. The non-magnetic material receiving hopper 8 and the magnetic material receiving hopper 10 are respectively fixed on the frame 1 by bolts, located under the magnetic cylinder 3 and the belt 4, and are used to receive materials falling from the belt 4. There is an ore separating plate 9 between the two hoppers. By adjusting the position of the ore separating plate 9, the ratio of concentrate to tailings can be controlled. Actual sorting factors such as strength adjust the ore separating plate 9 to determine its suitable position. Preferably, the utility model is also provided with a tensioning device 11, one end of which is connected to the shaft of the steering drum 7, and the other end is connected to the frame 1 through a screw, and the steering drum 7 can be turned on the machine by adjusting the screw on the tensioning device 11. The frame 1 moves back and forth, so that the distance between the magnetic cylinder 3 and the turning drum 7 is changed so as to control the tightness of the belt 4 .

The working principle of the dry magnetic separation equipment of the present utility model is:

The material enters the vibrating feeder 6 from the hopper 5, and falls evenly on the belt 4 under the action of the vibrating force of the feeder 6, and the belt 4 moves from the side of the steering drum 7 to the side of the magnetic cylinder 3. With the movement of the belt 4, the material gradually enters the magnetic field space of the magnetic cylinder 3. In the process of entering the magnetic field space, the magnetic particles in the material are first pre-magnetized, and the particles, especially the fine magnetic particles, form a magnetic chain under the action of the magnetic field force, and the magnetic chain is absorbed by the magnetic cylinder 3 and enters the magnetic material receiving hopper 10. The probability is much higher than the probability of single-particle microfine particle adsorption. This solves the recovery problem of fine magnetic particles that are easy to lose into the tailings, and ensures and improves the recovery rate of magnetic minerals.

After the material enters the magnetic field space of the magnetic cylinder 3, the non-magnetic material directly enters the non-magnetic material receiving hopper 8 under the action of centrifugal force and gravity, while the large-grained magnetic material and the magnetic chain formed by the fine-grained magnetic particles, along with The belt 4 continues to move forward on the surface of the magnetic cylinder 3, and performs self-turning motion in the high-speed rotating dynamic magnetic field of the magnetic system 31. The rotation speed of the magnetic system 31 can reach 1500rpm, and the number of times of magnetic particle turnover will be dozens of times that of conventional magnetic systems. The flipping of the drum, the flipping process can break up the formed magnetic chains, magnetic clusters and physical clusters, and the gangues mixed in it are also separated during the process of reunion-breakup-reunion-re-breakup. Under the action of centrifugal force, it enters the non-magnetic material receiving hopper 8. This solves the problem that the fine-grained gangue is mixed into the magnetic material and brought into the magnetic material receiving hopper 10, ensuring the grade of the magnetic separation concentrate and the tailing rate of the operation.

The faster the rotation speed of the magnetic system 31 and the more magnetic pole groups, the higher the turnover frequency of magnetic particles, the more violent the material layer is turned, the more times the magnetic clusters are broken up, the smaller the gangue inclusions, and the non-magnetic materials The lower the loss of magnetic iron, the better the sorting effect. Under the action of the magnetic field force, the magnetic particles reach the magnetic material hopper area, move away from the magnetic field along with the belt 4, and fall into the magnetic material receiving hopper 10, and the sorting process is completed.

As can be seen from the above examples, the coarse magnetite dry magnetic separation equipment of the utility model embodiment has the following beneficial effects:

(1) By adopting a full magnetic system with a 360-degree wrap angle and a small pole surface magnetic pole structure, the gradient of the magnetic field is increased and the adsorption force is enhanced, which is conducive to the full recovery of magnetic minerals and improves the recovery rate of magnetic minerals;

(2) Adopting the dual-rotation design of the shell of the magnetic cylinder and the magnetic system, the turning times of magnetic particles are dozens of times that of conventional magnetic separation equipment, which is conducive to fully throwing out the gangue mixed in the material;

(3) The conveying method of belt conveying materials is adopted, which can fully disperse the materials while reducing the wear of the tube skin, and is also conducive to the unloading of the magnetic minerals that are adsorbed;

(4) The combination of the full magnetic system structure and the belt conveying method is adopted to form a pre-magnetized space, and the fine-grained magnetic minerals are pre-magnetized and form a magnetic chain after entering the magnetic field, which improves the recovery rate of magnetic materials in fine ore;

(5) After adopting the dry magnetic separation equipment provided by the utility model to carry out sorting, the gangue inclusions in the rough concentrate are less, the content of magnetic iron in the sorting tailings is lower, and the index of sorting is obviously better than the traditional Dry magnetic separation equipment. It is suitable for dry pre-selection and throwing of tailings before the coarse-grained magnetite enters the mill, or for dry separation of iron ore with a lot of powder ore, and can also be used for magnetite old tailings, river sand and steel slag Dry comprehensive recycling of iron ore resources.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And modification should also be regarded as the protection scope of the present utility model.

Claims (13)

1. coarse granule magnetic iron ore dry-type magnetic selection apparatus is characterized in that, comprising:

Frame;

Magnetic cylinder is arranged on the described frame;

Magnetic system is arranged in the described magnetic cylinder, the independent respectively rotation of described magnetic system and magnetic cylinder;

Bending roller is arranged on the described frame, is connected with described magnetic cylinder by belt;

Feeding mechanism is arranged on the described frame, is positioned at described belt top;

Receiving hopper is arranged on the described frame, is positioned at the below of described belt.

2. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, the cornerite that described magnetic is is 360 degree.

3. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, the pole-face width of the magnetic pole group that described magnetic is is 65-255mm.

4. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, described magnetic system comprises the magnetic pole group that N, S polar circle Zhou Fangxiang alternately arrange, described magnetic pole group add up to even number.

5. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 4 is characterized in that, described magnetic is as magnetic source with the permanent magnetism magnetic material.

6. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 5 is characterized in that described magnetic source comprises neodymium iron boron and ferrite magnetic material.

7. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, the tube skin of described magnetic cylinder adopts the material of non-magnetic conduction to make.

8. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that described feeding mechanism comprises:

Material bin is arranged on the described frame, is positioned at the top of described belt;

Batcher is arranged on the described frame, is positioned at described material bin below.

9. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that described batcher is motor oscillating batcher or electro-vibrating feeder.

10. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that described receiving hopper comprises non-magnetic material receiving hopper and magnetic material receiving hopper, respectively by being bolted on the frame, and separates by mine-separating board.

11. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, also comprises: take-up device, be connected with bending roller with described frame, be used to regulate the distance between described bending roller and the magnetic cylinder.

12. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, also comprises: casing, be arranged on the described frame, form confined space with described receiving hopper.

13. coarse granule magnetic iron ore dry-type magnetic selection apparatus as claimed in claim 1 is characterized in that, described magnetic cylinder and the bending roller bearing block by separately respectively are fixed on the described frame.

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