阅读说明：本技术 组合式立环悬浮扰动高梯度磁选机及利用其选矿的方法 (Combined vertical ring suspension disturbance high-gradient magnetic separator and mineral separation method using same ) 是由 郑霞裕 王毓华 薛子兴 卢东方 孙自玺 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种组合式立环悬浮扰动高梯度磁选机,包括机架、转环、磁系、精矿冲洗机构和精矿斗,所述磁系包括上磁轭、下磁轭和激磁线圈,所述机架上固设有矿浆槽,所述下磁轭设于矿浆槽的底部外壁处,所述上磁轭设于转环内,所述转环的下半部位于所述矿浆槽内,所述矿浆槽中设有矿浆扰动装置。本发明还提供一种利用上述的组合式立环悬浮扰动高梯度磁选机选矿的方法。本发明的组合式立环悬浮扰动高梯度磁选机在细粒级矿物(如赤泥)的分选中能够得到较立环脉动高梯度磁选设备更优的分选效果。(The invention discloses a combined vertical ring suspension disturbance high-gradient magnetic separator which comprises a rack, a rotating ring, a magnetic system, a concentrate washing mechanism and a concentrate hopper, wherein the magnetic system comprises an upper magnetic yoke, a lower magnetic yoke and an exciting coil, a slurry tank is fixedly arranged on the rack, the lower magnetic yoke is arranged on the outer wall of the bottom of the slurry tank, the upper magnetic yoke is arranged in the rotating ring, the lower half part of the rotating ring is positioned in the slurry tank, and a slurry disturbance device is arranged in the slurry tank. The invention also provides a mineral separation method for disturbing the high-gradient magnetic separator by utilizing the combined vertical ring suspension. The combined vertical ring suspension disturbance high-gradient magnetic separator can obtain a better separation effect in the separation of fine-grained minerals (such as red mud) compared with vertical ring pulsation high-gradient magnetic separation equipment.)

1. The utility model provides a modular ring suspension disturbance high gradient magnet separator stands, washes mechanism (4) and concentrate fill (5) including frame (1), change (2), magnetism system, concentrate, magnetism system includes magnet yoke (31), lower magnet yoke (32) and excitation coil (33), its characterized in that, the ore pulp groove (6) has set firmly on frame (1), the bottom outer wall department of ore pulp groove (6) is located in lower magnet yoke (32), go up in magnet yoke (31) locate change (2), the lower half of change (2) is located in ore pulp groove (6), be equipped with ore pulp disturbance device (7) in ore pulp groove (6).

2. The combined type vertical ring suspension disturbance high gradient magnetic separator according to claim 1, wherein the slurry disturbance device (7) comprises a swing arm (71) and a cross beam (72), the swing arm (71) is connected with the cross beam (72), the cross beam (72) is arranged at the bottom of the slurry tank (6), and a driving mechanism for driving the swing arm (71) to reciprocate so as to drive the cross beam (72) to swing at the bottom of the slurry tank (6) is arranged on the swing arm (71).

3. The combined vertical ring suspension disturbance high gradient magnetic separator as set forth in claim 2, characterized in that the angle β of rotation of the swing arm (71) is-30 ° to 30 °.

4. The combined vertical ring suspension disturbance high gradient magnetic separator as claimed in any one of claims 1-3, wherein the upper magnetic yoke (31), the lower magnetic yoke (32) and the rotating ring (2) are coaxially arranged.

5. The combined vertical ring suspension disturbance high gradient magnetic separator according to any one of claims 1 to 3, wherein the slurry tank (6), the rotary ring (2), the magnetic system and the slurry disturbance device (7) are all arranged in an inclined manner, the inclined angles of the slurry tank (6), the rotary ring (2), the magnetic system and the slurry disturbance device (7) are the same, and the included angle theta between the central axis of the rotary ring (2) and the horizontal plane is not more than 15 degrees.

6. The combined vertical ring suspension disturbance high gradient magnetic separator as claimed in any one of claims 1 to 3, wherein the combined vertical ring suspension disturbance high gradient magnetic separator does not contain a pulse generation device.

7. The combined vertical ring suspension disturbance high gradient magnetic separator as claimed in any one of claims 1-3, wherein the magnetic system further comprises a bottom magnetic yoke (34) and a side magnetic yoke (35), the bottom magnetic yoke (34) is arranged at the bottom of the lower magnetic yoke (32), and the side magnetic yoke (35) is arranged at two ends of the slurry tank (6).

8. The combined type vertical ring suspension disturbance high gradient magnetic separator as claimed in any one of claims 1 to 3, wherein the number of the rotating rings (2) is multiple, the rotating rings (2) are coaxially arranged in series, and each rotating ring (2) is independently provided with an upper magnetic yoke (31) and a lower magnetic yoke (32) which are matched with each other.

9. A method for mineral separation by using the combined vertical ring suspension disturbance high gradient magnetic separator as claimed in any one of claims 1-8, characterized by comprising the following steps:

s1: the rotating ring (2) is driven to rotate, direct current is introduced into the exciting coil (33), and a separation area between the upper magnetic yoke (31) and the lower magnetic yoke (32) generates a magnetic field;

s2: adding raw ore pulp into the ore pulp tank (6), starting the ore pulp disturbance device (7), adsorbing magnetic particles on the surface of a magnetic medium of the rotating ring (2) when the raw ore pulp flows through the bottom of the rotating ring (2), leaving a separation area along with the rotation of the rotating ring (2), and flushing the top of the rotating ring (2) by a concentrate flushing mechanism (4) to enter a concentrate hopper (5);

s3: after magnetic particles are collected and adsorbed by the rotary ring (2) for many times, tailing pulp which is not collected by the rotary ring (2) is discharged from the pulp groove (6), and the whole ore dressing process is completed.

10. The method according to claim 9, characterized in that a plurality of swivels (2) are provided in the slurry flow direction, and that the magnetic force generated by each swivel (2) increases in sequence in the slurry flow direction.

Technical Field

The invention belongs to the field of magnetic separation, and particularly relates to a magnetic separator and a mineral separation method using the same.

Background

The high-gradient magnetic separation technology is an effective means for separating micro-fine particle weakly magnetic minerals. The basic working flow of the equipment is that raw ore pulp is fed into a magnetic medium on a rotating ring through a gap of an upper magnetic yoke, magnetic particles are adsorbed on the surface of the magnetic medium, are separated from a separation area of a strong magnetic field by the rotating ring, are reversely washed by washing water at the top of the rotating ring and are flushed into a concentrate hopper; the nonmagnetic particles are not collected by the magnetic medium, pass through the magnetic medium area under the action of gravity and pulsating fluid force, and are discharged along the gap of the lower magnetic yoke to become tailings, so that the separation from the magnetic particles is realized. In order to enable ore pulp to smoothly enter and exit the separation medium box, ore pulp channels need to be reserved in the upper magnetic yoke and the lower magnetic yoke of the device, the integrity of the magnetic yokes is damaged, and the uniformity of local magnetic field distribution is further damaged.

Studies have shown that in high gradient magnetic separation systems with longitudinal configuration (magnetic field direction parallel to the feed direction and both perpendicular to the axial direction of the magnetic medium), mechanical entrainment of gangue minerals is mainly due to the direct impact of the feed stream on the magnetic mineral accumulation zone on the magnetic medium. Vertical-ring pulsating high-gradient magnetic separation equipment is longitudinally arranged, and a magnetic mineral accumulation area on a medium is directly impacted by mineral flow, so that gangue minerals are easily mixed in the magnetic mineral accumulation area, and the grade of concentrate is influenced.

In order to solve the problem of magnetic medium blockage, the pulsating flow with certain strength is introduced into the vertical-ring pulsating high-gradient magnetic separation equipment, the problem of magnetic medium blockage is solved by introducing the pulsating flow, the concentrate grade is improved to a certain extent, but the fluid pulsation increases the fluid viscosity force borne by fine-grained weakly magnetic minerals, and the fine-grained minerals are seriously lost.

In addition, the narrow-size-fraction segmented magnetic separation is favorable for improving the separation efficiency of weakly magnetic minerals, and the existing vertical-ring pulsating high-gradient magnetic separation equipment usually adopts one-time operation to complete full-size-fraction separation, so that the adverse effect between coarse-size-fraction and fine-size-fraction mineral separation is not favorably eliminated.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background technology, and provide a combined vertical ring suspension disturbance high-gradient magnetic separator and a mineral separation method using the same. In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the utility model provides a modular found ring suspension disturbance high gradient magnet separator, washes mechanism and concentrate fill including frame, change, magnetism system, concentrate, magnetism system includes yoke, lower yoke and exciting coil, the pulp tank has set firmly in the frame, the bottom outer wall department in pulp tank is located to lower yoke, the change is located to the yoke, the lower half of change is located in the pulp tank, be equipped with ore pulp disturbance device in the pulp tank.

In the invention, a separation area is arranged between the upper magnetic yoke and the lower magnetic yoke, and the magnetic medium of the rotating ring is positioned in the separation area and used for collecting magnetic particles.

Among the above-mentioned combination formula founds ring suspension disturbance high gradient magnet separator, preferred, ore pulp disturbance device includes swing arm and crossbeam, the swing arm is connected with the crossbeam, the crossbeam is located the bottom of ore pulp groove, be equipped with in the swing arm and be used for driving swing arm reciprocating motion in order to drive the crossbeam at the wobbling actuating mechanism of ore pulp groove bottom. The swing arm of ore pulp disturbance device is close to the terminal surface in ore pulp groove, and two swing arms are connected to the crossbeam, and the swing arm drives the crossbeam swing, and then the disturbance ore pulp makes the mineral particle suspension to do benefit to the weak magnetic mineral particle of magnetic medium collection. More preferably, the angle beta of the swing arm rotation is-30 to 30 degrees.

In the above-mentioned combined type vertical ring suspension disturbance high gradient magnetic separator, preferably, the upper magnetic yoke, the lower magnetic yoke and the rotating ring are arranged coaxially.

Among the above-mentioned combination formula founds ring suspension disturbance high gradient magnet separator, preferred, ore pulp groove, swivel, magnetism are all the slope setting with ore pulp disturbance device, ore pulp groove, swivel, magnetism are the same with ore pulp disturbance device's inclination, the swivel center pin is no longer than 15 with the contained angle theta of horizontal plane. The magnetic separator is obliquely arranged, so that the raw ore pulp can flow from one end of the ore pulp tank to the other end of the ore pulp tank more easily under the action of gravity.

In the above-mentioned combination formula is found ring suspension disturbance high gradient magnet separator, preferred, the magnetism system still includes bottom yoke and side yoke, the bottom of yoke is located down to the bottom yoke, the both ends in ore pulp groove are located to the side yoke. The bottom yoke and the side yoke are used for communicating the magnetic circuit.

Among the above-mentioned combination formula founds ring suspension disturbance high gradient magnet separator, preferred, the quantity of change is a plurality of (like 2 ~ 10), and the coaxial series connection of a plurality of changes sets up, and every change all independently is equipped with the upper yoke and the lower yoke of mutually supporting.

In the above-mentioned combined vertical ring suspension disturbance high gradient magnetic separator, preferably, the combined vertical ring suspension disturbance high gradient magnetic separator does not contain a pulse generator. The structure of the magnetic separator is different from the conventional magnetic separation mechanism, so that the problem that separation cannot be continuously carried out due to the blockage of a magnetic medium can be solved, a pulse generating device can be omitted, the phenomenon that the fluid viscosity force borne by fine-grained weak-magnetic minerals is increased in a pulsating mode is avoided, and the loss of the fine-grained minerals is reduced.

The pulp disturbing device and the pulp tank of the combined vertical ring suspension disturbance high-gradient magnetic separator can be made of 304 stainless steel, but are not limited to be made of other non-magnetic materials which can meet the mechanical requirements.

As a general technical concept, the invention also provides a method for mineral separation by using the combined vertical ring suspension disturbance high-gradient magnetic separator, which comprises the following steps:

s1: the rotating ring is driven to rotate, direct current is introduced into the exciting coil, and a magnetic field is generated in a separation area between the upper magnetic yoke and the lower magnetic yoke;

s2: adding raw ore pulp into the ore pulp tank, starting the ore pulp disturbance device, adsorbing magnetic particles on the surface of a magnetic medium of the rotating ring when the raw ore pulp flows through the bottom of the rotating ring, leaving a separation area along with the rotation of the rotating ring, and flushing the top of the rotating ring by a concentrate flushing mechanism to enter a concentrate hopper;

s3: after magnetic particles are adsorbed by multiple times of swivel collection, tailing pulp which is not collected by the swivels is discharged from the pulp tank, and the whole mineral separation process is completed.

In the above method, preferably, a plurality of the rotary rings are arranged along the flowing direction of the slurry, and the magnetic field force generated by each rotary ring is increased in sequence along the flowing direction of the slurry. The magnetic media on the rotary rings can be reasonably configured according to needs, for example, in the axial flow direction of ore pulp, the sizes of the magnetic media on each rotary ring are sequentially reduced, or different media types are adopted, so that the magnetic field force generated by the media on each rotary ring is sequentially increased, the separation of coarse fraction minerals and fine fraction minerals is completed in different areas, and the mutual influence of the coarse fraction minerals and the fine fraction minerals during the separation is weakened.

Compared with the prior art, the invention has the advantages that:

1. the upper and lower magnetic yokes of the combined vertical ring suspension disturbance high-gradient magnetic separator do not need to leave an ore pulp channel and a clear water channel, so that the integrity of the upper and lower magnetic yokes is maintained, and the magnetic field distribution is more uniform.

2. The invention changes the feeding mode, the ore pulp automatically flows into the ore pulp tank, and the mineral particles are uniformly suspended under the action of the ore pulp disturbance device, thereby avoiding the problem of mechanical inclusion caused by that the feeding flow directly impacts the magnetic mineral accumulation area at the upstream of the medium in the vertical ring pulsating high-gradient magnetic separation equipment.

3. The magnetic medium directly collects the magnetic particles in the suspended ore pulp, the problem that the separation cannot be continuously carried out due to the blockage of the magnetic medium is solved, the disturbance of the ore pulp disturbance device only needs to ensure that the particles can be uniformly suspended, strong stirring is not needed, and the serious loss of fine-grained minerals is avoided.

4. The multiple groups of the rotating rings can work simultaneously, the sizes of media on the rotating rings can be sequentially reduced in the flowing direction of ore pulp, and magnetic fields generated by the media in the flowing direction of the ore pulp can be sequentially increased by adopting other modes (such as different types of magnetic media), so that the separation of the coarse and fine particle size mineral particles is respectively completed in different areas, the adaptability of the equipment is greatly enhanced, and the mineral separation efficiency is improved.

5. In the invention, the current of each group of exciting coils can be independently adjusted, thereby further improving the flexibility of equipment operation and the adaptability to raw materials.

In general, the combined vertical ring suspension disturbance high-gradient magnetic separator can obtain better separation effect than vertical ring pulsation high-gradient magnetic separation equipment in the separation of fine-grained minerals (such as red mud).

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a combined vertical-ring suspension-disturbed high-gradient magnetic separator in the embodiment.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a front view in the direction of the cross-section C-C shown in fig. 2.

Fig. 4 is a section 1/2 of a schematic structural diagram including a slurry tank, a magnetic yoke, a swivel and a beam in an embodiment.

Figure 5 is a schematic structural diagram of a pulp disturbance device in the embodiment.

FIG. 6 is a front view of the combined vertical ring suspension disturbing high gradient magnetic separator in the embodiment, which is obliquely arranged along the section C-C in FIG. 2.

Illustration of the drawings:

1. a frame; 2. rotating the ring; 31. an upper magnetic yoke; 32. a lower magnetic yoke; 33. an exciting coil; 34. a bottom yoke; 35. a side yoke; 4. a concentrate flushing mechanism; 5. a concentrate hopper; 6. a slurry tank; 7. an ore pulp disturbance device; 71. swinging arms; 7101. a first connecting hole of the swing arm; 7102. a second connecting hole of the swing arm; 72. a cross beam; 8. a main shaft; 9. a support shaft; 10. a feeding port; 11. and (4) a mine discharge port.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.