RU2799675C1 - Rotary sifter with removable mixer and mixer for it - Google Patents

Abstract

FIELD: deposition techniques.

SUBSTANCE: proposed group of inventions relates to the production of equipment for the deposition of particles with magnetic properties in loose mixtures and can be used to clean any contaminated bulk material, in particular, in agriculture for the preparation of feed mixtures, both finely dispersed and containing large fractions. A rotary sifter with a removable mixer comprises a loading box connected to the front wall of the screening chamber by means of a flange and equipped with a cover, a screening chamber with a lower unloading flange and a cylindrical body, an electric motor mounted on the flange, unloading and loading trays, a loading box flange, a bearing frame, whereas the sifter is equipped with a magnetic separator. The sieving chamber consists of a sieve fixed on the frame, a magnetic separator made in the form of a panel installed in the sifter body with magnetic rods fixed on it, a sieve cover fixed on the sieving chamber flange, a sieve inspection hatch located on the cylindrical body, a screening pipe with a shutter, a shaft equipped with a screw feeder fixed on it and a rotor with blades, fixed in the coupling and in the bearing assembly, respectively. The rotor blades are adjustable in the radial direction. The loading box of the sieving chamber is connected to the mixer by means of a quick-detachable flange, or by means of the upper flange of the loading box of the sifter, or by means of the lower unloading flange of the sifter. The magnetic rods of the magnetic separator are made in the form of permanent magnets. In a removable mixer on the shaft-rotor, mixing elements of at least two types are rigidly fixed: the first is made parabolic, the second is made arcuate with a radius from 1/2 to the height of the parabola of the first mixing element, or is made in the form of adjacent crossed rectilinear blades fixed in a crosshair on a stand perpendicular to the rotor shaft, wherein the protruding parts of both mixing elements are held by the stand passing through a groove or hole in the rotor shaft.

EFFECT: increase in the efficiency of mixing the mixture, sieving and removing metal impurities from the mixture, as well as simplifying the maintenance of the sifter design.

15 cl, 9 dwg, 4 tbl

Description

The field of application of a rotary sifter with a removable mixer is the production of equipment for the deposition of particles with magnetic properties in loose mixtures, and can be used to clean any contaminated bulk material, in particular, in agriculture for the preparation of feed mixtures, both finely dispersed and containing coarse factions.

Rotary sifter is designed for screening, removal of metal impurities and aeration of free-flowing slightly abrasive food and non-food products. It is used as a device for a technological line, which provides a complete cycle of product preparation from mixing individual ingredients to sieving mixtures from impurities or individual ingredients. The sifter also provides aeration for loose, slightly abrasive food and non-food products. Rotary pierce can work with any feeding device that provides continuous supply of product into it, while it is possible to operate the sifter without installing a mixer.

From the prior art, the invention "Sump loading device", patent RU 2 047 382, publ.10.11.1995, MPKB03C 1/00 B03B 5/62, containing receiving container, supply pipe, outlet, magnetic system. Refers to equipment for the deposition of particles in the liquid with strong magnetic properties. Allows you to ensure uninterrupted operation, however, the magnetic system in the form of shells made of magnetic material can only work when extracting magnetic particles from drain water. It does not provide savings on maintenance and consumables without loss of quality, since the passage of the iron mixture clogs the entire device.

Known invention "Mobile unit for cleaning bulk material", patent RU 2 571 112, publ. separating device, allows you to clean heavily contaminated bulk material, such as sand. However, residues of contaminants often stick to the sand. It is difficult to operate and dangerous due to the steam generator. It does not provide simplification of maintenance and the possibility of its use with a mixer.

Known invention "Magnetohydrostatic centrifugal separator", patent RU1 2 170 621, pub.: 20.07.2001, MPKB03C 1/32 B03B 5/32, B04B 5/10, containing a separation chamber with a magnetic system made of permanent magnets, and unloading devices . However, the separation chamber is filled with magnetic fluid, which significantly complicates its maintenance and does not allow saving consumables. Used to separate non-magnetic materials. It imposes restrictions on the size of the material to be separated and has a low productivity associated with the supply of ingredients. Cannot be used as part of a production line together, for example, with a mixer.

The closest technical solution is the utility model "Scrubber - concentrator", patent RU 163 149, publ. 07/10/2016, IPC B03B 5/00, B03C 1/10, containing a loading hopper, a supporting frame, unloading trays, is equipped with a magnetic system installed outside the cylindrical body and an unloading tray made along the axis of the pipe body with an end cap. It is used in the field of mineral processing, or for iron removal and classification of clay materials. Allows to obtain a finely dispersed pulp with a high degree of free movement of clay and magnetic particles in it. However, it is not suitable for screening mixtures in agriculture, since it works with a mixture of particles in a liquid. Does not provide ease of maintenance, saving consumables and is not designed to work with a mixer.

In continuous preparatory processes, it is necessary at the initial stage to ensure a continuous supply of various components from one or more feeders due to the screw shaft in the screener housing, then to pre-mix these components while simultaneously screening them from impurities in the form of dust, debris, as well as from magnetic inclusions such as metal shavings. At the same time, it is necessary to ensure the possibility of the sifter operation both as part of a technological line, including a convenient connection in the required spatial position with the mixer, and convenient maintenance of the sifter and mixer. In particular, to reduce the time for cleaning the magnetic separator and the loading and unloading trays. In particular, it is required to simplify the operation of the magnetic separator by eliminating brushes, which will save on consumables without loss of quality. It is required to ensure savings on maintenance and consumables without loss of quality, without clogging the entire device during the passage of the iron mixture.

The proposed technical solution of a rotary sieve with a removable mixer allows to achieve the following technical result:

- simplification of maintenance of the sifter design;

- savings on consumables without loss of quality due to the absence of brushes;

- the ability to use the sifter together with the mixer at any location of the mixer relative to the sifter, or to use both the sifter and the mixer separately from each other;

The performance of the proposed sifter device depends on the choice of the following characteristics: the product used, the mesh size depending on the requirement for the sieve, as well as the installation point of the method of supplying the product either from the mixer or from any feed device with which the device is used in possible applications: a) under the silo, which uses the gravitational method of direct feeding; b) either conveyor, in which the supply is carried out without pressure from the feeder or from the mixer.

Depending on these characteristics, a sifter capacity of 1100 - 3000 tons is achieved.

The technical result is achieved due to the fact that the rotary sifter with a removable mixer contains a loading box (1) connected to the front wall of the sieving chamber (2) by means of a flange (3) and equipped with a lid (4), a sieving chamber (2) with a lower unloading flange (5) and a cylindrical body (6), an electric motor (7) mounted on a flange (8), unloading (9) and loading (10) trays, a flange (3a) of the loading box (1), a supporting frame (12). The screener is equipped with a magnetic system, which is a magnetic separator, the cylindrical body (6) of the screener. What is new is that the flange (3a) of the loading box can be attached to the technological hopper for feeding raw materials in manual mode or to install an adapter for docking with a feeder for feeding raw materials in automatic mode. Thus, the loading box (1) can be attached to the technological hopper (not shown conventionally) for feeding raw materials in manual mode, or an adapter (11 shown conventionally) is installed to dock with the feeder for feeding raw materials in automatic mode or installed from the mixer.

The screening chamber (2) consists of a sieve (13) fixed on a frame (14). In a particular case, the sieve cells (13) are punched with cell parameters for Rv from 2-3.5 to 8-12, depending on the steel grade and cell area s=1mm, or the sieve cells (13) are made woven with cell parameters from 2- 2.0-0.4 mm to 2-5.0-0.7 mm when using stainless steel mesh. The sieve cells (13) indicated in Table 2 can be arranged in a standard way, forming holes of equal area. It depends on the requirements for the screened materials. The magnetic separator (14) is made in the form of a panel (15) with magnetic rods (16) fixed on it, which are with permanent magnets, the panel is installed in the housing (17) of the sifter. In a particular case, the panel (15) is made removable (removable from the housing (17)) with replaceable magnetic rods (16). The magnetic rods (16) can be made in the form of permanent magnets with their positive pole facing in one direction or in different directions, for example, in pairs towards each other. For example, the panel (15) is fixed in the lower part of the body (17) of the sieving chamber (2), and the magnetic rods (16) are attached to the panel (15) at the ends. The cover (4) of the sieve (13) is fixed on the flange (3) of the sieving chamber (2), the inspection hatch (18) of the sieve (13) is placed on the cylindrical body (6) of the magnetic separator, the screening pipe (19) with a damper (20) , the shaft (21) is equipped with a screw feeder (22) fixed on it and a rotor with blades (23) fixed in the coupling (24) and the bearing assembly (25), respectively. The rotor blades (23) are radially adjustable by means of a movable flange (26). The loading box (1) of the screening chamber (2) is connected to the mixer by means of a quick-detachable flange (conditionally not shown) either to the upper flange (3) of the loading box (2) of the screener or to the lower unloading flange (5) of the screener;

The design is illustrated by drawings, which, however, do not cover all possible options.

On FIG. 1 - a sifter is shown with a perspective view of all its elements, a quick-release flange for connecting a mixer is conventionally not shown;

On FIG. 2 - side view of the sifter is shown, the quick-release flange for connecting the mixer is conventionally not shown;

On FIG. 3 - a top view of the sifter is shown, the quick-release flange for connecting the mixer is conventionally not shown;

On FIG. 4 - a perspective view of a sifter with a removable flange (shown conditionally) with a mixer (shown in thin lines);

The design of the sifter is made as follows.

The cylindrical body (6) of the screener consists of a screening chamber (2) and a loading box (1) attached to the front wall of the screening chamber using a flange (3). An electric motor (7) is installed on the flange (8) of the loading box (2).

To install the sifter on the frame (12), a support (28) is provided on the loading box (1), and on the sifting chamber (2), the lower flange (5) should be used for this (see Fig. 2 and 4). A flange (3a) is located on the loading box (1), which can be used for direct attachment to the technological hopper, or for installing an adapter for docking with a feeder or mixer.

On the side wall of the loading box (1) there is a hole closed by a cover (29) used for mounting components and visual inspection.

The screening chamber (2) is a welded construction. It has a sieve (13) fixed to the frame (14) and a magnetic separator, which is a removable panel (15), on which magnetic rods (16) are fixed. Access to the sieve (13) is possible through the sieve inspection hatch (18), which is bolted to the end flange (3) of the sieving chamber for visual control of the sieve condition (13) without disassembling the sifter from above the sifting chamber (2).

To remove the screening products from the screening chamber, a screening pipe (19) is used (see Fig. 2). There is a damper (20) in the branch pipe to control the amount of screening.

In the loading box (1) there is a shaft (21) assembly, on which a screw feeder (22) and a rotor with blades (23) are fixed. The blades can move in the radial direction to adjust the gap between them and the screen (13).

One shaft support is a clutch (24), which transmits rotation from the electric motor (7), and the other support is a bearing assembly (25).

The sifter works as follows.

The sifted product enters the loading box (1) and is fed by a screw feeder (22) to the screening chamber (2), where the rotor blades (23) push it through the cells of the fixed sieve (13) by centrifugal force. The screened product passes through a magnetic separator (14), on the rods (16) of which the metal impurities that have passed through the sieve (13) are deposited.

Metal impurities are subject to removal in accordance with the technological regulations through the screening pipe (19). Waste from the screening chamber enters the screening through the screening pipe (19). The sifter is controlled by the control system according to the algorithm.

The mixer can be connected to the flange (3a) of the loading chute (10) of the loading box (1) or to the flange (5) of the unloading chute (9) of the screening chamber (2).

At the same time, this sifter and mixer work both as separate units and together, but they do not replace each other.

At the same time, the sifter is designed for screening, removing metal impurities and aerating loose, slightly abrasive food and non-food products, and the mixer for obtaining a homogeneous mass. The sifter can be used both independently and as part of technological lines, for example, in conjunction with a mixer. The sifter can work with any feeding device that provides a continuous supply of product into it.

As an example, table 1 shows the technical characteristics of a sifter calculated for a capacity of 1100 tons.

The main technical characteristics of the sifter. Table 1.

Name of parameters Meaning Sieve mesh size, mm* 1.1…5.0* Electric motor:
- rated speed, rpm
- power, kWt 750
1.1 Nominal parameters of the consumed alternating electric current:
- voltage, V
- frequency Hz 380
50 Degree of protection of a cover of the electric motor IP54 Overall dimensions, mm, not more than:
- length
- width
- height 1370
380
440 Weight, kg, no more 80 Material version*: - Art.3**
- AISI 304

In this case, the dimensions of the sieve cells are selected based on the required mixture and the technological design of the sieve. Table 2 shows an example of a perforated screen and a braided screen.

Specifications of the sieve. Table 2.

Sieve type Material Cell parameters* Prosechnoe Perf sheet. steel 08ps Rv 2-3.5; s=1mm Rv 3-4; s=1mm Rv 5-6; s=1mm Rv 1.75-2.5; s=1mm Rv 8-10; s=1mm Rv 2.5-4; s=1mm Perf sheet. steel 08X18H10 Rv 2-3.5; s=1mm Rv 3-5; s=1mm Rv 5-8; s=1mm Rv 8-12; s=1mm Wicker Grid steel 12X18H10T 2-2.0-0.4mm 2-3.2-0.5mm 2-5.0-0.7mm 2-2.5-0.4mm

As a result of the proposed design of the magnetic separator, it is not required to clean the magnetic rods, which results in savings on consumables without loss of quality due to the absence of brushes;

The mixer belongs to materials mixing devices and can be used in construction, mining, food, medical and other industries. It can be used in a production line together with a sifter, both on the condition that unsifted ingredients are fed into the mixer, then the mixture is fed from the mixer into the sifter, and on condition that the ingredients sifted into the sifters are fed into the mixer, then the ingredients are fed into the mixer after the sifter . Also the mixer can work separately from the mixer.

The mixer is designed for batch mixing of bulk food ingredients in order to prepare dry multicomponent mixtures of a uniform polydisperse composition.

Thus, the mixer can work with any feeding vehicle that provides a continuous supply of product into it, as well as together with a sifter at any location of the mixer relative to the sifter.

The prior art invention "feeder-mixer", patent RU 2 118 083, publ. drive of a horizontal shaft with the possibility of its rotation in the opposite direction. However designed for feeding and mixing in the distribution of feed in agriculture. Increases uniformity of forage unloading when it is distributed on both sides. The free formation of thick feed mixtures in the loading tank is disturbed, and the stability of their gravity flow into the discharging augers through the unloading windows is disturbed, which reduces the percentage of mixing.

Known invention "Device for mixing materials", patent RU1193687, publ. 11/12/2019, IPC B01F 9/02 B01F 9/02, containing a mixing chamber, a rotation drive with a gear, a carrier and racks. Can be used in construction, mining, food, medical and other industries. Allows you to increase the mixing of materials by distributing the loaded material inside the chamber. However, it reduces its effectiveness due to the accumulation of material under the hatch at the time of loading. There are no mixing elements, which cannot be used to increase the mixing percentage.

The invention "Drum mixer" is known, patent RU 2 595 659, publ.: 27.08.2016, MPKB01F 9/02, containing a cylindrical housing, a shaft on which the housing, a bearing support, a drive, a frame, a mixing device are installed. Allows to intensify the process of mixing components. However, at the same time, there is a long mixing cycle, high energy costs per unit of the finished mixture, and the absence of the direction of the mixture from the center of the mixer along the edges and from top to bottom, which reduces the redistribution of material in the housing and, as a result, reduces the percentage of mixing. In addition, the kneading element is made in the form of perforated membranes, which complicates the design.

Known application "Method of mixing dissimilar components and a device for its implementation", application RU 2019 112 877, publ.: 26.10.2020, IPC B01F 9/06 B01F 7/04, which uses a gravity-type mixer, and mixing components and breaking the flow the mixtures are carried out due to the dropping of the mixed components by the blades of the gravitational mixer onto the blades of the forced mixer. But this process is carried out due to the shaft, and not the shape of the kneading element. It does not allow to simplify the design of kneading elements, which ensure the direction of the ingredients during mixing from the center of the mixer to the edges and from top to bottom, therefore, they do not simplify them and increase the percentage of mixing.

The closest to the proposed technical solution is the useful model "Device for mixing materials", patent RU 199 421, publ. 09/01/2020. IPC B28C 7/04, B22C 5/04, B01F 9/00, containing a mixing chamber with a hatch, placed on the carrier with a latch, rotation transmission and a rack. Allows you to increase the efficiency of mixing materials due to the organization of selective loading and unloading of material, but not at the expense of mixing elements, which ensure the direction of the ingredients during mixing from the center of the mixer to the edges and from top to bottom. A spherical chamber is used, but simplified mixing elements are not used.

In the proposed design of the mixer, it is required to solve the problem of the maximum percentage of mixing, which is increased due to the mixing elements, and also, if possible, to simplify the design of the mixing elements, but which ensure the direction of the ingredients during mixing from the center of the mixer to the edges and from top to bottom.

To do this, the mixer uses a special form of the mixing element, which allows you to achieve the maximum percentage of mixing with their simple form.

The technical result achieved by the proposed design of the mixer is:

- form simplification mixing element

- increase in the percentage of mixing from 75 to 98 percent .

The technical result is achieved due to the fact that the mixer contains racks (30), in which the housing (32) of the mixing chamber and the rotation drive (33) are fixed in the bearing assemblies (31), the rotational movement of the mixing chamber is provided by means of a drive equipped with a planet carrier (34) with fixator (35). The housing (32) is provided with an outlet hatch (36) and a flange (37). New in the proposed technical solution is that the drive (33) is equipped with a shaft-rotor (38), made with the possibility of rotation in the opposite direction of rotation of the body (32) of the mixing chamber. In a particular case, the drive (33) is equipped with a shaft - a rotor (38) made with the possibility of rotation in the opposite direction of rotation of the body (32) of the mixing chamber. In particular, the drive (33) is provided with a shaft-rotor (38) capable of counterclockwise rotation in the absence of rotation of the housing (32) of the mixing chamber. The shaft-rotor (39) is connected to the drive motor (33) by means of connecting assemblies (39), in which the shaft-rotor (38) is rotatably mounted in bearing assemblies (31) located in the mixer stands (1). The body (32) of the mixing chamber is connected to the shaft-rotor (38) by means of a connecting assembly (39) with a carrier (34) rigidly fixed to the body (32) of the mixing chamber. In a particular case, the housing (32) of the mixing chamber is fixed in at least two connecting nodes (39) in the left and right versions, one of which is equipped with a friction clutch (not shown conventionally), which ensures the transmission of rotation from the shaft - rotor (38) on the body (32). In a particular case, the carrier (34) is equipped (or performs the function of a release lever), by means of which the transmission of rotational motion to the housing (32) is stopped or the rotational motion is transmitted from the shaft - rotor (38) to the carrier (34) with a latch (35), which allows stop the housing (32) of the mixing chamber in 4 or more fixed positions. At least two types of mixing elements (40) are rigidly fixed on the rotor shaft (38): the first is made parabolic with a design step, the second is arcuate with a radius equal to ½ to the full height of the parabola of the first mixing element with the same step, moreover, the protruding parts of both mixing elements (40) are held by a stand (41) passing through a groove or hole in the rotor shaft (38). The mixer flange is additionally equipped with a connecting flange that provides a quick-detachable connection of the mixer to the sifter, both to the upper flange of the sifter loading box and to the lower unloading flange of the sifter. In a particular case, the second mixing element (40) is deployed in a plane perpendicular to the first mixing element (40). There can also be a design when the first mixing element is made in the form of arc-shaped mixing elements forming a parabola in space on the continuation of the curve repeating its configuration, and the second mixing element is made in the form of adjacent crossing rectilinear blades fixed in a crosshair on a rack perpendicular to the shaft - rotor (41) (see Fig. 9). The mixer flange, for example, is additionally equipped with a connecting flange (shown conventionally in Fig. 4), providing a quick-detachable connection of the mixer to the sifter, both to the upper flange (3a) of the sifter loading box (1) and to the lower unloading flange (5) of the sifter and is a quick-detachable connecting flange; In a particular case, the outlet hatch (36) is provided with a mechanism for shifting and/or opening the hatch. In this case, the connection of the mixer by means of a quick-detachable flange to the upper flange of the sifter loading box, the outlet hatch (36) is movable.

The design of the mixer is illustrated by the drawings, which do not cover all variants of the mixer.

On FIG. 5 shows separately a longitudinal section of a mixer with mixing elements;

On FIG. 6 is a side view of a mixer with an unloading nozzle;

On FIG. 7 - shows a side view of the mixer from the side of the carrier;

On FIG. 8 shows a top view of a damper mixer;

On FIG. 9 shows a longitudinal section with simplified mixing elements;

The mixer works as follows.

The rotor shaft (38), on which the mixing elements (40) are located, operates in a counterclockwise mode. In this case, the body (32) of the mixing chamber can operate in three modes: with counterclockwise rotation, in clockwise mode, or be stationary relative to the rotor shaft (38). The mode of rotation of the body (32) of the mixing chamber is provided by the connecting assembly (39), in which, if necessary, a friction clutch with a release lever of the rotation drive (33) is located. Mixing elements (40), due to the fact that they are located in the same step and fixed at the same points, form a kind of sinusoid, which organizes the movement of the stirred mixture in such a way that the mixing of bulk products is carried out by directing them from the center of the mixer along the edges, and from top to bottom, while straight mixing elements in the form of racks (41) and parabolic and/or arcuate mixing elements constantly mix directed flows, thereby creating a mixing effect throughout the mixer space, since longitudinal movement of the mixture from the sides to the center is created.

Thus, due to the simple form, when they are organized in space, an increase in the percentage of mixing is obtained. In this case, the shape of the mixing elements is greatly simplified.

The unloading of the finished mixture is carried out using the outlet hatch (36) with an attached flange (37). The finished mixture can be fed through this flange, for example, into a sifter as part of a production line. Alternatively, the mixture for mixing can be discharged from the sifter through the quick-release flange (11) into the mixer.

Evaluate mixers by evaluating the value of the coefficient of heterogeneity Kv (%). The lower the Kv value, expressed as a percentage, the more homogeneous the mixture. At a value of Kv < 10%, the mixing efficiency of the feed components is good, at 10–15% it is satisfactory. In this case, the percentage of mixing is not more than 75%.

When using a technical solution in a specific proposed sample, a mixing percentage of up to 98% is obtained. This is compared with known mixers, for example, a mixer of the A9-BSG-3 type, the percentage of mixing increases by at least 8%, since the percentage of mixing in such a mixer is not higher than 90%.

As an example, the specifications of such a device are shown in Table 3, which uses the following mode of operation.

Mixer operating modes. Table 3

Working mode periodic short-term Ambient temperature from + 1ºC to + 40ºC Climatic performance UHL 4 according to GOST 15150-69 Relative humidity up to 80% at + 25ºC

Table 4 shows the technical data for a specific mixer version.

Specifications. Table 4

Name of parameters Meaning Nominal parameters of the consumed alternating electric current:
- voltage, V
- frequency Hz 380 (220)**
50 Degree of protection of the shell
electric motor IP54 Overall dimensions, not more than, mm:
Length x Width x Height Class of electrical products according to the method of protection against electric shock, according to GOST 12.2.007.0-75. 1 * Execution - for voltage 220 V is specified when ordering.

The mixer can be connected to the sifter by means of a quick-release flange both through the flange (3a) of the loading tray (10) of the loading box (1) of the sifter, and to the flange (5) of the unloading tray (9) of the sifter. These products work both as separate units and together, but they do not replace each other. Together, the sifter and mixer work as a device for the production line, which provides a complete cycle of product preparation from mixing individual ingredients to sifting mixtures from impurities or individual ingredients. The rotary shooter with detachable mixer can be operated with any feeder providing a continuous supply of product to either the sifter or the mixer.

Claims (15)

1. Rotary sifter with a removable mixer, containing a loading box attached to the front wall of the sieving chamber by means of a flange and equipped with a lid, a sieving chamber with a lower unloading flange and a cylindrical body, an electric motor mounted on the flange, unloading and loading trays, a loading box flange, a carrier frame, while the sifter is equipped with a magnetic separator, characterized in that the sifting chamber consists of a sieve mounted on a frame, a magnetic separator made in the form of a panel installed in the sifter housing with magnetic rods fixed on it, a sieve cover fixed on the chamber flange screening hatch, a sieve inspection hatch placed on a cylindrical body, a screening pipe with a damper, a shaft equipped with a screw feeder fixed on it and a rotor with blades fixed in the coupling and in the bearing assembly, respectively, while the rotor blades are made adjustable in the radial direction, and the loading the sieving chamber box is connected to the mixer by means of a quick-release flange, or by means of the upper flange of the sifter loading box, or by means of the lower unloading sifter flange, and the magnetic rods of the magnetic separator are made in the form of permanent magnets. 2. Rotary sifter with a removable mixer according to claim 1, characterized in that the sieve cells are punched with cell parameters for Rv from 2-3.5 to 8-12, depending on the steel grade and cell area s = 1 mm. 3. Rotary sifter with a removable mixer according to claim 1, characterized in that the sieve cells are woven with cell parameters from 2-2.0-0.4 to 2-5.0-0.7 mm, when using a stainless steel mesh become. 4. Rotary sifter with a removable mixer according to claim 1, characterized in that the magnetic rod panel is made removable with replaceable magnetic rods. 5. Rotary sifter with a removable mixer according to claim 1, characterized in that the magnetic rods are made in the form of permanent magnets facing the positive pole in one direction. 6. Rotary sifter with a removable mixer according to claim 1, characterized in that the magnetic rods are made in the form of permanent magnets facing the positive pole in each pair of rods in opposite directions. 7. Rotary sifter with a removable mixer according to claim 1, or 5, or 6, characterized in that the panel is fixed in the lower part of the screening chamber housing, and the magnetic rods are attached to the panel at the ends. 8. Removable mixer containing racks in which the mixing chamber housing and the rotation drive are fixed in the bearing units, providing rotational movement of the mixing chamber by means of a carrier equipped with a lock, and the mixing chamber housing is equipped with an outlet hatch and a flange, characterized in that the drive is equipped with a shaft - a rotor configured to rotate relative to the rotation of the mixing chamber body, the mixing chamber body is connected to the rotor shaft by means of a connecting unit with a carrier rigidly fixed to the mixing chamber body, mixing elements of at least two types are rigidly fixed to the rotor shaft: the first is made parabolic , the second is made arcuate with a radius equal to from ^1/2 to the height of the parabola of the first mixing element, or is made in the form of adjacent intersecting rectilinear blades fixed at the crosshairs on a stand _{perpendicular} to the rotor shaft, and the protruding parts of both mixing elements are held by a stand passing through a groove or hole in the rotor shaft, and the mixer flange is additionally equipped with a connecting flange that provides a quick-detachable connection of the mixer to the sifter both to the upper flange of the sifter loading box and to the lower unloading flange of the sifter. 9. Removable mixer according to claim 8, characterized in that the rotor shaft is rotatable in the same direction of rotation of the mixing chamber housing. 10. Removable mixer according to claim 8, characterized in that the rotor shaft is connected to the electric motor by means of connecting nodes, in which the rotor shaft is rotatably mounted in bearing assemblies placed in the mixer racks. 11. Removable mixer according to claim 8, characterized in that the body of the mixing chamber is mounted in at least two connecting nodes in the left and right versions, one of which is equipped with a friction clutch that transfers rotation from the rotor shaft drive to the body. 12. Removable mixer according to claim 11, characterized in that the drive or carrier is equipped with a release lever, through which the transmission of rotational motion to the housing is stopped or rotational motion is transmitted from the rotor shaft to the carrier with a lock that allows you to stop the mixing chamber housing in 4 or more fixed positions. 13. Removable mixer according to claim 8, characterized in that the second mixing element is deployed in a plane perpendicular to the first mixing element. 14. Removable mixer according to claim 8, characterized in that the outlet hatch is made with a mechanism for shifting and / or opening the hatch. 15. Removable mixer according to claim 8, characterized in that when the mixer is connected by means of a quick-release flange to the upper flange of the sifter loading box, the outlet hatch is movable.

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