Method of magnetic separation of fine submagnetic loose products and magnetic separator to this end

FIELD: process engineering.

SUBSTANCE: invention relates to dry magnetic separation and may be used in mining, glass-work, chemical industry, etc. Proposed method comprises feeding initial submagnetic loose material along vertical magnetic system inducing magnetic field forces directed along normal to magnet working surface, separating said material into magnetic and nonmagnetic fractions and distributing separated product among appropriate bins. Product is fed in parallel flows along vertical zones of maximum magnetic force effects. Note here that every flow is forced through free fall deceleration device while magnetic fraction deposited on permanent magnet surfaces is forced vertically downward by means of vibrator.

EFFECT: higher efficiency of magnetic separation.

10 cl, 13 dwg

 

The invention relates to the field of dry magnetic separation of fine weakly magnetic solids and can be used in mining, glass, chemical and other industries.

There is a method of dry magnetic separation [1], which involves feeding the separated product from the feeder vertically along the installed vertically, flat magnetic system of magnetic separator [1], magnetic separation on magnetic and nonmagnetic fractions, distribution preparirovania product receivers of its magnetic and nonmagnetic fractions. The magnetic separator [1], which implements the method of dry magnetic separation, includes feeder product supplied to the separation, vertically mounted magnetic system, distributors and receivers of the magnetic and nonmagnetic fractions of the product. Magnetic system magnetic separator [1] creates a magnetic field gradient which magnetic force is directed normal to the working surface of the magnetic system. Method of dry magnetic separation [1], which is implemented in the magnetic separator, the magnetic separator [1] are taken as prototypes of the proposed method of magnetic separation of fine weakly magnetic solids and magnetic separator for its implementation.

The process of magnetic Sep the radio in the prototype is as follows. Fine weakly magnetic solid under the action of gravity feed from the feeder and falls vertically along the magnetic system of the separator. Thus the trajectory of the nonmagnetic fraction of the product is determined only by the force of gravity, and the trajectory of the magnetic fraction is determined by two forces: gravity and directed along the normal to it, the magnetic force that moves the particles of the magnetic fraction horizontally in the direction of the working surface of the magnetic system of the separator. As a consequence, the trajectory of the particles of the magnetic and nonmagnetic fractions are not the same, and that provides a magnetic separation on magnetic and nonmagnetic fractions: non-magnetic fraction, moving vertically enters the receiver non-magnetic fraction and the magnetic fraction, falling vertically and simultaneously deviating to a working surface of the magnetic system gets further into the receiver of the magnetic fraction preparirovania product (if this fraction reaches the surface of the magnets and will not settle on the surface under the action of magnetic forces).

When implementing the method of dry magnetic separation in a magnetic separator [1] there are great technical difficulties that caused the principal disadvantages of a magnetic separator of the prototype. For a clear separation of the magnetic and NEMA itoi fractions of the product by corresponding receivers need considerable distance (the width of the "fans") between the magnetic flux and flux nonmagnetic fractions at the outlet of these product streams from the zone of the magnetic forces. This distance (the width of the "fans") should be at least a few centimeters. As the nonmagnetic fraction decreases linearly to obtain the width of the "fans" of the product in a few centimeters at its exit from the zone of action of magnetic forces it is necessary that the layer of product that moves (falls) along the plane of the working surface of the magnetic system, also had a few centimeters. But as further from the working surface of the magnetic system of magnetic force sharply decreases, the deviation of the magnetic flux of the product or its deposition on the working surface of the layer of a few centimetres is almost impossible. This is because emerging at free fall speed of the product on a magnetic separator system is so large, and accordingly, the time allotted movement with acceleration of particles-magnetic fractions on a trajectory toward the working surface is so small that to overcome the magnetic forces on this trajectory alternative inertial forces it sets the height of the magnetic system must reach several meters. These technical difficulties of the method for dry magnetic separation of magnetic products [1] in the magnetic separator [1] the principle and almost insurmountable: technological requirements to the thickness of the Loya product (at least a few centimeters) contrary to the requirements magnitospinovyi characteristics of the separator, restrict this layer is the product of the thickness of within one centimeter (often within just a few millimeters). Contradictory as the simultaneous requirements for magnetic separator [1] to the magnitude of the magnetic forces that attract magnetic particles to the working surface of the magnetic system. The increase in these forces improves the separation of falling product on the magnetic and nonmagnetic fractions and reduces the required height of the magnetic system, but at the same time increases the intensity of the build-up of these particles on the working surface, which can lead to their braking and even complete cessation of movement down. In order to obtain a large magnetic force field FM=HgradH need not only to create a large magnetic field H, but, more importantly, to get a great gradH, that is, to ensure the rapid increase in the value of N when approaching the deposition surface, which is possible only with a thin layer of product.

Thus, in the magnetic separator [1] in contradiction contradictory requirements: on the one hand, the need to ensure that the layer thickness of the falling product at least a few centimeters, and, on the other hand, the need to have the thickness of this layer of the product within one centimeter.

It should also be noted that the creation of large magnitnykh forces on the working surface of the magnetic system can cause such an intense pressing of particles of the magnetic fraction to a working surface, the movement of these particles under the action of gravity Fg will become impossible and the magnetic separator [1] in this case, will become unusable. If you use the possibility of magnetic separator [1] to obtain the precipitation of the particles of the magnetic fraction even at low magnetic forces due to the increase in height of the magnetic system, the dimensions, weight and, as a consequence, the cost of such a separator will be inadmissible on technical and economic indicators. When separation magnetic [1] very weakly magnetic products (for example, quartz sand, hematite ore) all of the above mentioned shortcomings of magnetic separator [1] only worse.

Because of the separated product falls with acceleration g=9.8 m/c2then, for example, already in the first second of its fall product flies of 4.9 meters, which consequently requires the same height of the magnetic system. Practically this is unacceptable.

Fall product evenly over the entire width of the magnetic separator [1] requires the creation of a magnetic field, respectively, equal to the magnetic force across the entire width of the product flow. But, even when using permanent magnets Nd-Fe-B highest energy (Wd=400 to 500 kJ/m3to achieve the necessary magnetic forces across the entire width of the working surface without the concentration of these forces at least CTD the selected areas is impossible, and therefore implemented in the magnetic separator [1] magnetic system is ineffective for the deposition of fine weakly magnetic products as, for example, quartz, biotite, hematite, ilmenite and other

The basis of the invention is tasked to improve the efficiency of the method of magnetic separation of fine weakly magnetic solids by reducing the speed drop, bandwidth product only along the vertical areas of maximum forces and transportation deposited on the working surface of the separator the magnetic fraction of the product in the receiver of the magnetic fraction.

The problem is solved in the method of magnetic separation of fine weakly magnetic granular products, comprising feeding the separated product installed vertically along the magnetic system, which creates a magnetic force field directed normal to the working surface of the magnets, the magnetic separation of the product on the magnetic and nonmagnetic fractions, distribution preparirovania product receivers of its magnetic and nonmagnetic fractions, which according to the invention the product is fed in parallel flow along the vertical areas of maximum magnetic forces, where each stream is fed through the device slowing down the speed of free fall of the product, and moving vertically downward magnetic fraction of the product deposited on the surface of the deposition along the work the surface of the magnetic system, vypolnen the th of permanent magnets, perform using vibrator.

The problem is solved in the method of magnetic separation of fine weakly magnetic solids, which fall product shall be along multilevel magnetic system, each of the subsequent steps in which the direction of the product is displaced horizontally relative to the previous step.

The problem is solved in the method of magnetic separation of fine weakly magnetic solids, which fall product perform relative speed of the magnetic system of different heights and different intensity of the magnetic force field.

The problem is solved in a magnetic separator, comprising a feeder of the separated product, vertically mounted magnetic system, which creates a magnetic force field directed normal to the working surface of the magnets, separators and receivers of the magnetic and nonmagnetic fractions of the product, which according to the invention the separator complement vibrator connected to surface deposition, and devices slow down the speed of falling of the product, which is placed in thin-walled non-magnetic guides product flow gutters installed vertically in the zones of maximum magnetic force field, and the magnetic system is made of permanent magnets neo is popular horizontally interleaved vertical zones of maximum and minimum steps magnetic force fields.

The problem is solved in a magnetic separator, in which the device is slowing falling velocity of the product is carried out in a strained thin non-magnetic strings, installed perpendicular to the working surface of the magnets.

The problem is solved in a magnetic separator, in which the device slowing down the rate of fall product perform as inclined to the vertical and to each other thin non-magnetic plates arranged staggered one below the other with the possibility of pouring the product from the plate on the plate when it is falling under the influence of gravity.

The problem is solved in a magnetic separator, in which a magnetic separator system perform in the direction of movement of the product with multistage horizontal offset of each of the following steps relative to the previous one.

The problem is solved in a magnetic separator, in which each step of the magnetic system perform different heights and with different magnetic strength of the field.

The problem is solved in a magnetic separator, in which a magnetic separator system made of a plate permanent magnets placed on the ferromagnetic shunt alternating them the polarity of the horizontal and gutter installed along the separation zone, the polarity of the permanent magnets.

Supplied with the I problem is solved in the magnetic separator, in which a magnetic separator system made of a flat plate permanent magnets installed in series one behind the other in the horizontal direction and are separated by a ferromagnetic plate hub, to which the permanent magnets adjacent their same poles, and gutter installed along the ferromagnetic hub with two opposite sides of the magnetic system.

Proposed in the invention of artificial slow drop along the vertically installed planar magnetic system magnetic separator allows (in comparison with the prototype) to reduce the height of the magnetic system and the amount of magnetic force needed to extract the ferromagnetic particles from a stream of falling product and deposition on the working surface of the magnetic system, or at least for sufficient deflection of the trajectory of these particles relative to the trajectory of the particles of the nonmagnetic fraction of the product. This is because decreasing the speed drop correspondingly the time of its movement under the action of magnetic forces in the direction of the working surface of the magnetic system. By increasing the time required to overcome the ferromagnetic particles of the distance to the work surface, it becomes possible to increase the layer falling p is oduct, so, accordingly to increase the width of the "fans" preparirovania product when it is out of the range of the magnetic forces. The expansion of the "fans" of the product increases the separation efficiency of the product on the magnetic and nonmagnetic fractions.

The reduction in the rate of fall of the product allows to reduce the height of the magnetic system (at constant magnetic forces) or reduce the amount of magnetic forces (at a constant height of the magnetic system).

As you approach the surface of the permanent magnets the magnetic forces that act on the ferromagnetic particles are substantially increased, some of these particles is deposited on the working surface of the separator, and if the friction force of the particles on this surface is greater than the force of gravity, the particles that settled, accumulate on this surface, resulting in reduced efficiency of the separation process.

Proposed invention the use of a vibrator, the power of which is attached to freely attached a thin non-magnetic sheet covering the surface of the permanent magnets provides a "slipping" settled on this sheet of ferromagnetic particles under the force of vibration and gravity down the receiver of the magnetic fraction preparirovania product. If necessary, force vibration can be applied and to the gutters, if eating is the likelihood of blockage of the flow of the product on the device slowing down the rate of fall of the product.

For the separation of dry (low viscosity) products that are not prone to clumping, the device is slow drop invited to perform as inclined to the vertical and to each other thin non-magnetic plate installed with the possibility of pouring the product from the plate on the plate when it is falling under the influence of gravity.

When performing device slowing falling velocity of the product in the form of a thin highly strained non-magnetic strings, placed in grooves normal to the flow of the falling of the product is achieved not only by reducing the speed of falling of the product but also its loosening, fracture somavamsis factions and creating svobodnopodveshennyj state product in the working volume of the separator. In this condition disappear almost forces the mutual friction between the falling particles of the product and creates favorable conditions for mechanically independent of the movement of non-magnetic particles under the action of gravity is vertical, and magnetic particles under the simultaneous action of magnetic forces and gravity - at an angle to the working surface of the magnetic system (to the deposition surface of the magnetic fraction).

Separation of the least magnetospirillum products requires the maximum value of the magnetic forces. The magnitude of these forces is limited to the maximum of tolminka falling product, where the magnetic force of sufficient magnitude. In such cases, the single-stage (vertical) the execution of the separator to receive technologically permissible width "fans" preparirovania product is almost impossible. To overcome these difficulties, in accordance with the invention it is proposed to perform the multi-stage separator in the direction of the product. Every next stage of this separator is displaced horizontally from the previous one by a small amount, while maintaining a mostly upright position. Since the fall of the nonmagnetic fraction occurs only vertically, the particles of this fraction in a thin stream will move (fall) along all stages of the separator, without changing its initial trajectory. Particles as magnetic fractions under the action of magnetic forces on each stage will be displaced horizontally by a distance equal to the offset of each stage of the separator relative to the subsequent. The distance of the incident magnetic fraction from the working surface of the magnetic system at each step, you can save the specified minimum. The more stages, the more the width of the "fans" of the product at the outlet from the zone of action of magnetic forces.

The magnetic fraction of the product during its free fall at every stage and due to its "shaking off" stage in which brutorum along the deposition surface will be displaced at each step in the direction of the magnetic system of the separator, moving away from vertically falling nonmagnetic fractions which provides the necessary width "fans" preparirovania product. Therefore, the number of vertical stages of the separator is one of the main factors which determine the efficiency of separation. Use in the magnetic system of each of steps of different heights and different intensity of the magnetic force field allows flexibility in a wide range to form the topology of the magnetic field forces in accordance with the specific process requirements. Multistage vertical magnetic system with a large number of stages can be viewed as a single-stage, set at a slight angle to the vertical.

An even more important factor separation efficiency, particularly the least magnetospirillum products, is the intensity of the magnetic force field of the permanent magnets in the working volume of the separator. The separation of these products to generate sufficient magnetic force in the whole volume along a flat magnetic system is impossible. Therefore, the topology of the magnetic forces must be uniform with the concentration of magnetic field on some (working) areas due to the weakening of the magnetic field on the other (outside) areas. Accordingly, the flow of the separated product should be uniform across the width m is Gnanou system, what is achieved by passing the product through individual vertical gutters installed it in areas of maximum magnetic forces.

Such demands are met according to the invention proposed magnetic system composed of flat permanent magnets high energy (Nd-Fe-B), installed on a common magnetic shunt - magnetic core with alternating polarity magnets horizontally and unipolarity vertically. The greatest magnetic force in this magnetic system occur in the vertical zones of the polarity of the magnets.

The trench is pumped through the product flow in the separation, establish in these areas, and this is achieved most effectively removing from the total flow of the product of its weakly magnetic fraction.

A magnetic system with a concentration of magnetic field forces in a narrow vertical zones can also be performed from a flat plate permanent magnets mounted vertically one after the other in series and separated also plate-shaped ferromagnetic hub, to which the permanent magnets adjacent their similar poles. In the magnetic separator with such a magnetic system vertical zone with the concentration of magnetic forces occur along the ferromagnetic hub with each of the two opposite symmetricinstance magnetic system. This allows the separator symmetrically bilateral, that is, with submission of the product to the separation from two opposite sides, which increases the performance of the separator and optimizes the use of magnetic energy permanent magnets in magnetic systems of this type.

The essence of the proposed invention is illustrated by the following graphic materials.

1 shows a longitudinal section of a single-stage separator with a one-way product flow.

Figure 2 shows a cross section of a single-stage separator with a one-way product flow.

Figure 3 shows a longitudinal section of the device slowing down the rate of fall of product, made in the form of a thin non-magnetic strings.

Figure 4 shows a longitudinal section of a multi-stage separator with a one-way product flow.

Figure 5 shows a cross-section of one of the stages of the multistage separator one-way product flow.

Figure 6 shows the scan vertical magnetic system multi-stage separator with a one-way product flow.

7 shows a longitudinal section of a single-stage separator two-way flow of product.

On Fig shows a cross-section of a single-stage separator two-way flow of product.

On Fig shows a longitudinal section of the magnetic system single-stage separator two-way flow of product.

Figure 10 shows a longitudinal section of a multistage separator two-way flow of product.

Figure 11 shows a cross-section of one of the stages of the multistage separator two-way flow of product.

On Fig depicted scan vertical magnetic system multi-stage separator two-way flow of product.

On Fig shows a longitudinal section of the device slowing down the rate of fall of the product in the form of inclined to the vertical and to each other thin non-magnetic plates.

The proposed magnetic separator in a single-stage performing one-way product flow (figure 1, figure 2, figure 3) includes a feeder feed product 1 (figure 1, figure 3), the device slowing down the rate of fall product 2 (figure 1, figure 2, figure 3), located inside guide product chute 3. The device slowing down the rate of fall product 2 is made of non-magnetic strings stretched along the normal to the surface of the permanent magnets. The magnetic system is made of flat permanent magnets 4 mounted vertically on a magnetic shunt 5 with alternating polarity poles horizontally. The surface of the permanent magnets (figure 1, figure 2) is closed thin-walled non-magnetic sheet 6 that is connected to the vibrator 7 and the vertical displacement of the sheet 6 by means of vibration of the guide roller is x 8. The separator 9 is installed with the possibility of dividing the product by the receivers of the magnetic fractions 10 and nonmagnetic fractions 11.

When multi-stage execution of the separator (figure 4, figure 5, 6) permanent magnets 12 set the vertical speed, which is enshrined in common to all levels of the magnetic shunt 13. The device slowing down the rate of fall of the product 14, and the guide groove 15 also perform accordingly multistage. The surface of the permanent magnets is closed with a thin non-magnetic sheet 16.

The magnetic separator two-way flow of product (Fig.7, Fig) consists of two identical halves with common to both halves of the vibrator 7, and a magnetic system (Fig.9), which are made of flat permanent magnets 17, separated by a plate-form ferromagnetic hub 18 to which the permanent magnets 17 are adjacent the same poles. Magnetic system 17, 18 creates an identical magnetic field in each symmetrical with respect to the magnetic system halves of the magnetic separator.

The magnetic separator two-way flow of product can also be performed multistage (figure 10, 11). The difference between the design of such a separator from stage (7, Fig) is reduced to a multi-stage execution magnetic hub 19, the permanent MAG is itov 20 and the thin-walled non-magnetic sheets 16, connected to the vibrator 7.

Depicted on Fig device for slowing the rate of fall of the product consists of a thin non-magnetic plate 21. Plate 21 is installed in the grooves 3 is symmetrical about the vertical plane of symmetry of the grooves 3 and inclined to each other with the possibility of pouring the product from a plate placed on one side of the plane of symmetry, on a plate placed on the other side of this plane.

The proposed method of magnetic separation of fine weakly magnetic solids is implemented on the magnetic separator, which operates as follows.

The separated product from the feeder 1 (1, 4, 7, figure 10) by gravity under the action of gravity Fg is served in trench 3, 15 on the device slowing down of drop 2, 14. If the device is slow speed drop 2 made in the form of stretched strings (figure 3), the slow drop occurs due to the collision of the incident particle product with tense strings. The reduction in the rate of fall of the product is determined by the density and the number of strings in the grooves 3, 15. Clash of the product with strings breaks, loosens and residetial falling product and translates it into svobodnopodveshennyj a condition in which virtually eliminates the friction (mechanical in aimogasta) between magnetic and non-magnetic particles of the product. As the chute 3, 15 are installed vertically along the magnetic system in areas of greatest magnetic force Fm, magnetovolume particles, which move in grooves 3, 15, under the action of magnetic forces, deviate from the vertical path and closer to the thin-walled non-magnetic sheet 6, 16. With the part magnetospirillum particles, which has not reached the sheet 6, 16, and settled down on it, then falling down falls through the separators product 9 in the receiver of the magnetic fraction 10. The second part magnetospirillum particles that settled on the surface of the nonmagnetic sheet 6, 16, under the action of the vibrator 7 in the vertical vibration of the sheet, freely pinned rollers 8, "slide" vertically to the next level and eventually through the separator 9 also gets into the receiver of the magnetic fraction 10. As for the nonmagnetic fraction of the product, the particles of this fraction, which operates only the force of gravity Fg, fall vertically through the separator 9 into the receiver nonmagnetic fractions 11.

When used in the separator device of a slowdown in the rate of fall product Fig decrease the speed drop occurs as a result of pouring the product from the plates 21 on the same plate placed on the other side of the plane of symmetry of the grooves 3. Reduce the speed of the pad is of the product on the plate 21 can be achieved by changing the angle of inclination of the plates, the change of the distance vertically between adjacent plates and the length of these plates.

In multi-stage magnetic separator (figure 4) the product is fed to the first stage separation of the feeder 1. In the future, the product moves in the working volume of the first stage of the magnetic system of permanent magnets 12 when the vibrator 7. While the nonmagnetic fraction of the product is moving (falling) vertically, and the trajectory of the magnetic fraction deviates from the vertical under the action of the magnetic force Fm in the direction of the magnetic system of the first stage. Reaching the deposition surface (non-magnetic sheet 16), magnetic particle fraction can either settle on a non-magnetic sheet 16, which is amenable to the action of the vibratory forces of the vibrator 7, or fly past the first stage on the following second degree of separation. Pasadena on the first degree of separation of part of the magnetic fraction of gravity falls on the second stage of separation. "Settled" on the surface of the nonmagnetic sheet 16 on the first stage of separation magnetic fraction under the action of vibration forces "slide" down on this sheet and utpada from him, gets on the second stage of separation. In the next stage of the process is similar. As the trough 15 of the magnetic separator (figure 4) also performed a multi-stage with their expansion as we move from one level n the following, it increases and the width of the "fans" preparirovania product when it is out of the range of the magnetic forces. The width of the "fans" is determined by the horizontal displacement following steps relative to the previous and the total number of steps. For optimization of the magnetic system in the specific conditions of the separation process of the product it is advisable to use each of the steps with different heights and with different topology of the magnetic force field.

When a large number of stages in the proposed magnetic separator can be regarded as a single stage with a slight angle of inclination relative to the vertical.

For all variants of the proposed magnetic separator performance is defined as the rate of fall of the product, and the number of vertical areas of maximum strength of the field, i.e. the width of the magnetic system and the cross-sectional area of the chute. The smaller magnetic susceptibility of the particles of the separated product, the specified area should be smaller. The cross-sectional shape of the grooves is chosen most often experimentally for the separation of a specific product.

When used in the separator electrovibration, to increase the effectiveness of its actions, it is advisable vibratory forces acting vertically "up", FD is inform with smaller amplitude and greater magnitude, and "down" - on the contrary (with greater amplitude and lower). Modern electronic controls electromagnets allow in principle to implement any program of work electrovibration.

Implementation of the proposed method and magnetic separator increases the efficiency of separation of fine weakly magnetic solids while reducing weight and dimensions of the magnetic separator and, consequently, reduce its cost.

The source of information

1. VG Derkach, I.S. Datsyuk. "Electromagnetic enrichment, Sverdlovsk, "Metallurgizdat", 1947, p.66-68.

1. The method of magnetic separation of fine weakly magnetic granular products, comprising feeding the separated product installed vertically along the magnetic system, which creates a magnetic force field directed normal to the working surface of the magnets, the magnetic separation of the product on the magnetic and nonmagnetic fractions, distribution preparirovania product receivers of its magnetic and nonmagnetic fractions, characterized in that the product serves concurrent threads along the vertical areas of maximum magnetic forces, where each stream is fed through the device slowing down the speed of free fall of the product, and moving vertically in the magnetic fraction of the product, deposited on the surface of the deposition along the work surface system of permanent magnets carried out using a vibrator.

2. The method of magnetic separation according to claim 1, characterized in that the fall of the product shall be along multilevel magnetic system, each of the subsequent steps in which the direction of the product is displaced horizontally relative to the previous step.

3. The method of magnetic separation according to claim 2, characterized in that the fall product perform relative speed of the magnetic system of different heights and different intensity of the magnetic force field.

4. A magnetic separator comprising a feeder of the separated product, vertically mounted magnetic system, which creates a magnetic force field directed normal to the working surface of the magnets, separators and receivers of the magnetic and nonmagnetic fractions of the product, characterized in that the separator complement vibrator connected to surface deposition, and devices slow down the speed of falling of the product, which is placed in thin-walled non-magnetic guides product flow gutters installed vertically in the zones of maximum magnetic force field, and the magnetic system is made of permanent magnets with alternating vertical zones of maximum and minimum magnetic the strength of the field.

5. The magnetic separator according to claim 4, characterized in that the device is slowing falling velocity of the product is carried out in a strained thin non-magnetic strings, installed perpendicular to the working surface of the magnets.

6. The magnetic separator according to claim 4, characterized in that the device slowing down the rate of fall product perform as inclined to the vertical and to each other thin non-magnetic plates arranged staggered one below the other with the possibility of pouring the product from the plate on the plate when it is falling under the influence of gravity.

7. The magnetic separator according to claim 4, characterized in that the magnetic separator system perform in the direction of movement of the product with multistage horizontal offset of each subsequent stage relative to the previous one.

8. The magnetic separator according to claim 7, characterized in that the speed of the magnetic system perform different heights and with different magnetic strength of the field.

9. The magnetic separator according to claim 4, characterized in that the magnetic separator system made of a plate permanent magnets placed on the ferromagnetic shunt alternating them the polarity of the horizontal and gutter installed along the separation zone, the polarity of the permanent magnets.

10. The magnetic separator according to claim 4, characterized in that the magnetic separator system issue is lnewt of the flat-plate permanent magnets, installed in series one behind the other in the horizontal direction and are separated by a ferromagnetic plate hub, to which the permanent magnets adjacent their same poles, and gutter installed along the ferromagnetic hub with two opposite sides of the magnetic system.



 

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Magnetic separator // 2346748

FIELD: mechanics.

SUBSTANCE: proposed magnetic separator comprises a system of profiled magnetic rods jointed together and incorporating magnets so that high-intensity magnetic effect zones are formed between facing magnates in adjacent rods surfaces and low-intensity zones are formed in the central zone between the said rods. The said profiled magnetic rods are arranged so that their ribs face the flow of medium cleared of ferroinclusions at the α angle to the direction of the aforesaid flow which allows the passage of entrapped ferroinclusions through the aforesaid high-intensity magnetic effect zone. The α angle magnitude is selected subject to the following condition, i.e. where b is the distance between facing magnets, D is the magnet width.

EFFECT: ruling out tunnel breakthrough of ferroparticles through separator working zone.

6 dwg

Magnetic separator // 2440195

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic separation of solid materials from fluid, namely, to magnetic separators with material cylindrical transfer device and fixed magnets to be sued in fine separation of emulsions and suspensions. Proposed separator comprises loading and unloading channels for magnetic and nonmagnetic products, working member made up of outer and inner cases made from nonmagnetic materials with two magnetic systems with permanent magnets, flow separator into magnetic and nonmagnetic fractions, filtration element from magnetically soft ferromagnetic. Said filtration element is made up of shaped triangular-cross section teeth. Teeth gaps are filled flush by nonmagnetic nonmetallic material. Note here that radial disturbed magnetic field is induced in annular gap between said cases with high radial gradient.

EFFECT: higher efficiency of separation, simplified design, smaller sizes.

2 dwg

Magnetic separator // 2440851

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic separation of sold materials from fluids, namely, to magnetic separators with material cylindrical drives and may be used in separation of emulsions and suspensions. Magnetic separator comprises feeding and discharging channels for magnetic and nonmagnetic materials, working member made up of inner and outer cases made from nonmagnetic materials, device to separate flow into magnetic and nonmagnetic fractions, and filter element from ferromagnetic. Said filter features triangular cross section. Gaps between teeth in said filter is filled flush with nonmetallic nonmagnetic material. Said filter element is made magnetically hard ferromagnetic material and magnetised in radial direction to induce inherent residual pseudo homogeneous magnetic field with intensity H and large radial gradient.

EFFECT: higher efficiency of separation and operation, simplified design, smaller overall dimensions.

2 dwg

Magnetic separator // 2440852

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic separation of sold materials from fluids, namely, to magnetic separators with material cylindrical drives and may be used in separation of emulsions and suspensions. Magnetic separator comprises feeding and discharging channels for magnetic and nonmagnetic materials, working member made up of inner and outer cases made from nonmagnetic materials, device to separate flow into magnetic and nonmagnetic fractions, and filter element from ferromagnetic. Filtration element is made up of two aligned spirals made from magnetically soft ferromagnetic different-diameter wires with pitch equal to 3-5 wire diameters wound on outer surface of inner case and buried flush with case surface to produce induction of disturbed magnetic field flow with high radial gradient in formed clearance between cases of magnetic system.

EFFECT: higher efficiency, decreased overall dimensions and weight.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to dry magnetic separation and may be used in mining, glass-work, chemical industry, etc. Proposed method comprises feeding initial submagnetic loose material along vertical magnetic system inducing magnetic field forces directed along normal to magnet working surface, separating said material into magnetic and nonmagnetic fractions and distributing separated product among appropriate bins. Product is fed in parallel flows along vertical zones of maximum magnetic force effects. Note here that every flow is forced through free fall deceleration device while magnetic fraction deposited on permanent magnet surfaces is forced vertically downward by means of vibrator.

EFFECT: higher efficiency of magnetic separation.

10 cl, 13 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic separation with free falling material. Electromagnetic gravitational separator comprises electromagnet with polar tips, control unit, bumper (1) fitted at product duct bottom (2), jacket-pan with handle (3) that covers polar tips. said electromagnet is equipped with magnetisation coils (4) fitted on cores (5) provided with polar tips. Control unit adjusts magnetic induction at concentrators. Inclined product duct (2) is arranged at 45-70 to horizontal line. Separator comprises the set of replaceable polar tips for removal of iron inclusions. Polar tips are composed of magnetic field concentrators with round and square holes.

EFFECT: higher inhomogeneity of magnetic field, decreased number of winding turns, higher magnetic induction at concentrators.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and diamond processing industry. Device for separating fractions contains a loading bunker that is connected with mechanical crushing device of large units connected to upper section of the box with attached metal activator in the form of a high voltage source, vessel for receiving fractions. Box is located vertically and is equipped with two additional sections. One section has an activator of nonmagnetic metals in the form of a high voltage source attached to it, and the other - an activator of silicon carbide in the form of a high voltage source. Lower parts of each section have openings and a separating element to separate appropriate fractions located opposite the opening on the side of the box. Upper section of the separating element is a magnet for magnetic separation of metal, middle section is an electrode for removal of non-magnetic metal, and bottom section is a magnet and electrode for separation of silicon carbide or rock.

EFFECT: improvement of technological process, extraction of diamonds from wastes of diamond production.

1 cl, 1 dwg

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