CN201295638Y - High gradient magnetic separator - Google Patents

Abstract

A high gradient magnetic separator comprises a separating ring as well as a driving device, an ore feeding device, a refined ore unloading device and a refined ore collecting device of the separating ring, wherein the separating ring comprises a rotating ring, a magnetism gathering medium pack, an upper magnet yoke, an upper magnet, a lower magnet yoke, a lower magnet, a left magnet yoke, a right magnet yoke, and a magnetizing-demagnetizing device capable of magnetizing and demagnetizing the upper magnet and the lower magnet and comprising a magnetic coil and an excitation power supply. The utility model skillfully combines a permanent magnet with the excitation power supply so as to form a background magnetic field of the magnetic separator, and effective ore separation can be conducted by conveniently magnetizing the upper magnet and the lower magnet and then withdrawing the excitation power supply according to a requirement value of the background magnetic field during the work, and meanwhile, the problem of magnetic blockage is effectively solved by demagnetizing the upper magnet and the lower magnet during the assembly and the repair of the separator, therefore, not only the power consumption of the high gradient magnetic separator is greatly reduced, but also the convenient repair in the actual production can be fully ensured.

Description

A kind of high gradient magnetic separator

Technical field

The utility model relates to a kind of ore dressing magnetic separator, particularly relates to a kind of high gradient magnetic separator.

Background technology

The proposition of high-gradient magnetic separation theory gives magnetic concentration circle with qualitative leap, and the mineral species that allows to magnetic separation increases, and the granularity upper and lower limit broadens.Early stage high gradient magnetic separator is a periodic, also claims magnetic filter, and this kind equipment is used widely in handling the occasion that magnetic material content is extremely low and granularity is very thin.The continuous high gradient magnetic separator of Chu Xianing has the strong magnetic high gradient magnetic separator of the flat ring type of electromagnetism, permanent magnetism and electromagnetism double-vertical ring high-gradient magnetic separator immediately.The electromagnetism horizontal disk high gradient magnetic separator is owing to give the ore deposit identical with the rinse water direction, so cause machinery to stop up easily, the permanent magnet vertical ring high gradient magnetic separator is owing to the as easy as rolling off a log formation strongly magnetic mineral at the feed port place, the particularly accumulation of iron filings and magnetic takes place stop up, the magnetic separation of electromagnetism vertical ring high-gradient is owing to give the ore deposit opposite with the flow direction of concentrate flushing water in media stack, so being not easy to take place machinery stops up, again owing to be electromagnetism, so when exciting curent does not exist, strongly magnetic mineral and iron filings are easy to come off at the feed port place, and magnetic is stopped up and is not easy to take place.For being mingled with of nonmagnetics in the product that deperms, vibration and pulsating high gradient magnetic separator have appearred, as Chinese patent 86106144.6 disclosed a kind of pulsating high gradient magnetic separators, it can make the richness that is recovered material long-pending than improving, simultaneously because the panting action of water has reduced mechanical obstruction.

Chinese patent 02114994.1 discloses double-frequency vertical-ring pulsed high-gradient magnetic dressing machine, it adopts unique dipulse device, the fluid dynamic that can produce according to the ore pulp pulsation section different in magnetic separator sorting space with the magnetic force that magnetic field produces makes it effectively be separated to the difference of the different mineral grain group active force of magnetic.The dipulse device can be taken into account concentrate quality and metal recovery rate, can obtain high-grade concentrate, and tailings grade is dropped to a certain degree, and output part chats also simultaneously, this equipment are particularly suitable for handling the ore that contains the multi mineral composition that magnetic do not wait.

In sum, not to provide, provide by electromagnetism exactly by permanent magnetic iron providing of all these vertical ring high-gradient magnetic separator background magnetic fields.Provide the high gradient magnetic separator of background magnetic field can't solve the magnetic blockage problem by permanent magnetism, though provide the high gradient magnetic separator of background magnetic field can overcome the magnetic blockage problem by electromagnetism, provide the electromagnetism magnetic field of certain intensity background need continuously consume a large amount of electric energy.

Summary of the invention

The purpose of this utility model is exactly at the above-mentioned problems in the prior art, providing a kind of both can solve the magnetic blockage problem effectively and regulate magnetic field intensity easily, guarantee in the actual production easy to maintenance, the high gradient magnetic separator that can cut down the consumption of energy greatly again.

The purpose of this utility model is achieved through the following technical solutions:

A kind of high gradient magnetic separator, comprise that separation ring and drive unit thereof, mine-feeding equipment, concentrate unload ore deposit device and concentrate gathering-device, wherein separation ring comprises change and is installed on the magnetic matrix heap in the change, the upper magnet yoke that is positioned at the change medial and lateral, last magnet, lower yoke, lower magnet, it is characterized in that also including be installed on change below can fill the magnetising or demagnetising apparatus that demagnetization is handled to last magnet, lower magnet respectively, this magnetising or demagnetising apparatus comprises the close last magnet that is positioned at the change below and the solenoid and the excitation power supply that is connected with solenoid of lower magnet.

The utility model forms the background magnetic field of magnetic separator owing to dexterously permanent magnet and excitation power supply are combined, that scientifically utilizes in the electromagnetism hard (by force) magnetic material (title magnet) fills the demagnetization principle, and promptly the magnetic induction intensity of hard magnetic material can be set and control by parameter within the specific limits by magnetizer.Can stop the power supply that magnetizes when magnetic field intensity reaches desirable value, only the remanent magnetism by hard magnetic material provides the required background magnetic induction intensity of magnetic separator to carry out ore dressing work.And need repairing when detecting when equipment, can control the parameter of filling the demagnetization power supply, make the remanence disappearance of hard magnetic material.Therefore, when work can be easily according to the desired value of background magnetic field on magnet and lower magnet magnetize and remove excitation power supply again after handling and come mineral matter is carried out effective sorting, and when device assembles and maintenance can on magnet and lower magnet demagnetize and handle and effectively solve the magnetic blockage problem.The energy consumption of high gradient magnetic separator was reduced greatly, fully guaranteed in actual production easy to maintenance again.The coil that fills demagnetization simultaneously need not cool off because of the moment energising, can improve greatly its service life, and its maintenance cost is reduced greatly.

Describe basic composition of the present utility model and work operation principle in detail below in conjunction with accompanying drawing:

Description of drawings

Fig. 1 is a sectional structure schematic diagram of the present utility model;

Fig. 2 is a side sectional structure schematic diagram of the present utility model;

Fig. 3 is the hysteresis curve schematic diagram of ferromagnetic substance;

Fig. 4 is the normal magnetization curve schematic diagram of kicker magnet.

The specific embodiment

As Fig. 1～shown in Figure 2, a kind of high gradient magnetic separator described in the utility model comprises separation ring and drive unit thereof, mine-feeding equipment 7, the concentrate air water unloads ore deposit device and concentrate gathering-device 8, wherein separation ring comprises change 5 and is installed on magnetic matrix heap 2 in the change 5, be positioned at change 5, the upper magnet yoke 3 in the outside, last magnet 31, lower yoke 4, lower magnet 41, last magnet 31 and lower magnet 41 corresponding its characteristics be also to include be installed on the change below can be respectively to last magnet 31, lower magnet 41 fills the magnetising or demagnetising apparatus that demagnetization is handled, and this magnetising or demagnetising apparatus comprises the close last magnet 31 that is positioned at the change below and the solenoid 11 and the excitation power supply 12 that is connected with solenoid 11 of lower magnet 41.Wherein change 5 is vertical twin nuclei, interannular is provided with the rotating disk that dicyclo is connected as one, the axle sleeve that bearing is housed is set in the rotating disk, above-mentioned ring body is divided into the identical space of some volumes by some dividing plates, the magnetic matrix heap then is fixed in the corresponding space, above-mentioned magnetic matrix heap 2 is excellent medium, and this rod medium is to be fixed on the stainless sheet steel according to certain rules by thousands of magnetic stainless steel poles.The rod medium detachably cleans, and medium is reusable.Magnetic matrix is formed by the good materials processing of magnetic property, and magnetic matrix can be assembled the magnetic line of force in magnetic field, therefore can form the very high magnetic field of gradient on its surface, and magnetic field force is to be directly proportional with magnetic field intensity and magnetic field gradient.The magnetic matrix surface can form very high magnetic field force in magnetic field, can reclaim the very weak mineral of magnetic, and the big more magnetic field gradient of the surface curvature of magnetic matrix is high more, and the effect that reclaims the fine weak magnetic mineral of granularity is good more.

The course of work of the present utility model and principle are as follows:

As everyone knows, in magnetic field, the magnetic induction intensity of ferromagnet (ferromagnetic substance) is represented with the available curve of relation of magnetization field intensity, when magnetizing field is done the variation in cycle, the magnetic induction intensity in the ferromagnet and the relation of magnetic field intensity are closed lines, and this closed line is called hysteresis curve.

Figure 3 shows that the curve of ferromagnetic substance hysteresis.In general, the intensity of magnetization of ferromagnetic substance such as ferromagnet or magnetic induction intensity M are not the monotropic functions of magnetization field intensity H and depend on the history of its magnetic state of experiencing.With magnetic neutral state (H=M=B=0) has been primary state, when magnetic state when initial magnetization curve 0ABC is magnetized near the C point (as Fig. 3), this moment, the intensity of magnetization was tending towards saturated, curve is almost parallel with the H axle.Magnetic field intensity is designated as Hs at this moment, and the intensity of magnetization is designated as Ms.After this if reduce magnetic field, then from a certain magnetic field (B point), M departs from original initial magnetization curve with the variation of H, and the variation of M lags behind H.When H was decreased to zero, M was not reduced to zero, and equals remanent magnetization Mr.For making M reduce to zero, need add an opposing magnetic field, be called coercivity.The opposing magnetic field continues to increase to-and during Hs, the M of kicker magnet will be along magnetic reversal to being tending towards saturated-Ms, and the opposing magnetic field reduces and more oppositely the time, obtains the curve that another departs from reverse initial magnetization curve by similar rule.So become-Hs from Hs when magnetic field, again from-when Hs changes to Hs, the magnetic state of kicker magnet will be described by closed loop CBDEFEGBC, wherein two sections of BC and EF are corresponding to reversible magnetization, M is the monotropic function of H.And BDEGB is a hysteresis curve.On this loop line, same H can have two M values, is decided by the history of magnetic state.This is by due to the irreversible process of magnetization.If less than Hs ± Hm between during remagnetization, then obtain less hysteresis curve as shown in Figure 4, be called minor loop or minor loop.Corresponding to different Hm, different little loop lines can be arranged.And above-mentioned BDEGB is wherein maximum.So be called limit hysteresis curve.H magnetizes reversible substantially during greater than the maximum magnetic field strength Hs of limit loop line; When H was worth less than this, M was the multivalued function of H.

After the magnetising or demagnetising apparatus of excitation power supply 12 and solenoid 11 compositions magnetizes for the magnetic loop that is made of magnetic matrix heap, upper magnet yoke, last magnet, lower yoke, lower magnet, left yoke, right yoke and removes electric current, owing to last magnet 31 and following iron 41 are to have remanent magnetism by what hard magnetic material was processed into, this remanent magnetism pile 2 by magnetic matrix, upper magnet yoke 3, on the magnetic induction that produces certain intensity of the magnetic loop that constitutes of magnet 31, lower yoke 4, lower magnet 41, left yoke, right yoke.Magnetic matrix heap 2 surfaces can form very high magnetic field force.Separation ring counterclockwise rotates, and its underpart all is full of the magnetic matrix heap by the arc sorting space that last magnet 31 and lower magnet 41 form in each the sorting cell on the separation ring.

When ore pulp evenly and lentamente enters the sorting space by mine feeding bucket 7, because magnetic field force effect, the magnetic mineral particle is attracted on the magnetic matrix surface, on the magnetic matrix surface, continued to rotate by firm suction with separation ring, break away from magnetic field gradually, enter magnetic product and unload the mining area, because magnetic field is very weak in this zone, with the concentrate flushing water that filters through the flushing water filter and compressed air magnetic product is washed and enters concentrate bucket 8 from magnetic matrix surface upper punch, be magnetic product.Thereby the different particle swarm of magnetic is effectively separated.

The magnetising or demagnetising apparatus of forming by excitation power supply 12 and solenoid 11 again in device assembles and when maintenance on magnet 31 and lower magnet 41 demagnetize, make the remanence disappearance of magnet 31 and lower magnet 41, at this moment by magnetic matrix heap 2, upper magnet yoke 3, go up in the magnetic loop that magnet 31, lower yoke 4, lower magnet 41, left yoke 32, right yoke 42 constitutes and do not have magnetic induction, device assembles and regular maintenance are not only easily but also safety.

Claims (2)

1, a kind of high gradient magnetic separator, comprise separation ring and drive unit thereof, mine-feeding equipment (7), concentrate unloads ore deposit device (6) and concentrate gathering-device (8), wherein separation ring comprises change (5) and is installed on magnetic matrix heap (2) in the change (5), be positioned at change (5), the upper magnet yoke (3) in the outside, last magnet (31), lower yoke (4), lower magnet (41), it is characterized in that also including be installed on change below can be respectively to last magnet (31), lower magnet (41) fills the magnetising or demagnetising apparatus that demagnetization is handled, and this magnetising or demagnetising apparatus comprises the close last magnet (31) that is positioned at the change below and the solenoid (11) and the excitation power supply that is connected with solenoid (12) of lower magnet (41).

2, high gradient magnetic separator according to claim 1 is characterized in that above-mentioned last magnet is corresponding with lower magnet.

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