UA143489U - METHOD OF ENRICHMENT OF RAW MATERIALS OF POLYCOMPONENT TECHNOGENIC DEPOSITS - Google Patents

Abstract

The method of enrichment of raw materials of multicomponent man-made deposits includes extraction of the original product, crushing and crushing it, enrichment by magnetic separation to obtain magnetic and non-magnetic products. The input product is subjected to double screening, which results in three streams, one of which is a sub-sieve product of class (-5) mm, which is sent to the warehouse for disposal as a building material. The second stream is a sieve product (+15) mm, which is sent circulating to the composition of the input product. The third flow (-15- + 5) mm is sent to the process conveyor for placement in the storage hopper. From the storage hopper, the product is fed to the crusher on a rotary crusher to obtain the product of the fraction (-3) mm, as well as the dusty fraction, which is concentrated in the dust chamber and sent to the warehouse. The product of the fraction (-3) mm is concentrated in a storage hopper, from which it is fed to the grinding mill to the fraction (-0.5- + 0.02) mm, and the formed dusty fraction (-0.02) mm is sent to the dust chamber, from which it is transported to the warehouse. The obtained product fraction (-0.5- + 0.02) mm is sent to magnetic separation, which results in a magnetic product, which is sent to the warehouse of magnetic products. The magnetically impermeable product is fed to an electrostatic separation, which separates the source product into electrically conductive and intermediate products. The electrically conductive product is sent to the warehouse. The intermediate product is enriched by separating the particles by geometric parameters and density, for which the intermediate product is fed to the screen, forming a flow of oversized product (+0.45) mm and the flow of subnetting product (-0.45) mm. The flow of the sieve product (+0.45) mm is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated. Metal-containing particles are sent to the warehouse, and low-density particles - to the tailings. The product flow (-0.45) mm is fed to the screening, forming the flow of the sieve product (+0.4) mm and the flow of the sub-sieve product (-0.4) mm. The flow of the sieve product (+0.4) mm is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse and low-density particles to the tailings. The product flow (-0.4) mm is fed to the screening, forming the flow of the sieve product (+0.35) mm and the flow of the sieve product (-0.35) mm, while the flow of the sieve product (+0.35) mm is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles are sent to the tailings pond. The product flow (-0.35) mm is fed to the screen, forming the flow of the sieve product (+0.3) mm and the flow of the sieve product (-0.3) mm, while the flow of the sieve product (+0.3) mm is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles are sent to the tailings pond. The product flow (-0.3) mm is fed to the screen, forming the flow of the sieve product (+0.25 mm) and the flow of the sieve product (-0.25 mm), while the flow of the sieve product (+0.25 mm) is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles are sent to the tailings. The product flow (-0.25) mm is fed to the screening, forming the flow of the sieve product (+0.2) mm and the flow of the sieve product (-0.2) mm, while the flow of the sieve product (+0.2) mm is subjected to pneumatic separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles are sent to the tailings pond. The flow of sub-sieve product (-0.2) mm, which does not contain a metal-containing component, is sent to the tailings.

Description

separation by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles - to the tailings storage.

The product stream (-0.35) mm is fed to the screen, forming an over-sieve product stream (10.3) mm and a sub-sieve product stream (-0.3) mm, while the over-sieve product stream (10.3) mm is subjected to pneumatic separation by density, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The (-0.3) mm product stream is fed to the screen, forming an over-screen product stream (40.25) mm and an under-screen product stream (-0.25 mm), while the over-screen product stream (40.25) mm is subjected to pneumatic density separation , as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles - to the tailings storage.

The product stream (-0.25) mm is fed to the screen, forming a super-sieve product stream (10.2) mm and a sub-sieve product stream (- 0.2) mm, while the super-sieve product stream (40.2) mm is subjected to pneumatic separation by density, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The flow of the under-sieve product (-0.2) mm, which does not contain a metal-containing component, is sent to the tailings storage.

The useful model belongs to the field of metallurgy and can be used to extract useful components during the enrichment of raw materials represented by polycomponent man-made deposits formed as a result of the activities of metallurgical plants and mining processing plants.

A useful model can be implemented for the enrichment of non-standard ores, as well as other off-balance sheet mineral reserves.

A useful model can be implemented as a mobile or stationary complex operating in the immediate vicinity of a man-made deposit.

A known method of processing metallurgical slags. In the method, magnetic separation of each slag fraction is carried out separately to obtain conditioned metal, industrial product and slag, while magnetic separation of slag fractions of more than 5 mm is carried out in a magnetic field at a given linear speed of movement of the material separated in the magnetic field, and slag fractions of up to 5 mm before magnetic separation, they are subjected to pneumatic classification and separation of dedusted material is carried out in a magnetic field, and the industrial product obtained during magnetic separation of each slag fraction is subjected to selective crushing and sent to repeated magnetic separation. Separation products, according to their separation fan, formed during the movement of slags in a magnetic field, are sent to separate containers with the help of adjustable shutters (Russian Patent No. 2298586 for the invention).

The disadvantage of the known method is that its technological cycle involves significant losses of the useful component, which is returned to the slag storage. In addition, according to the method, there is no possibility of extracting minerals represented by non-magnetic particles of non-ferrous metals.

The method provides for the extraction of only magnetically susceptible particles, and the performed pneumatic separation operation serves only for the partial separation of the mineral component.

There is a known method of processing waste metallurgical slag, which includes crushing waste metallurgical slag, extraction of large scrap, magnetic separation using magnetic separators, each of which is set to the value of magnetic induction corresponding to one or another type of metal and/or metal alloys, and/ or metal oxides, which is characterized by the fact that after extraction of large scrap, slag is crushed, and

From it, magnetic separation is carried out first on serially arranged separators operating on permanent magnets, and then on serially arranged separators operating on electromagnets, for additional selection from pre-separated slags of metals and/or metal alloys, and/or metal oxides (Russian Patent Mo. 2222619 for the invention).

The disadvantage of the known method is the use of a large number of separators for magnetic separation, the implementation of constant control over compliance with the necessary adjustments of the magnetic induction value of magnetic separators, which corresponds to one or another type of metals and/or metal alloys, and/or metal oxides contained in slags.

The known method does not provide for the possibility of extracting non-ferrous metals from the total volume of raw materials for processing.

There is a known method of processing ash and slag waste of thermal power plants, which includes separation of glass microspheres from the total mass of waste, mechanical mixing of the pulp followed by sedimentation and their removal from the surface, separation of unburned organic residues by the flotation method. Mechanical mixing is carried out during a regulated time at a given ratio of liquid to solid. Unburned organic residues are separated in the lower part of the vessel and subjected to flotation after grinding, and after flotation, a stepwise magnetic separation is carried out (Russian Patent No. 2296624 for the invention).

The disadvantage of the known method is that its use is limited to a narrow range of useful components, which are extracted by flotation, and the use of magnetic separation allows extracting only magnetically susceptible particles.

There is a well-known method of processing industrial waste, which consists in subjecting the waste to magnetic separation. Treated industrial waste is first collected from the flue gases at the sedimentation equipment, in which the selective selection of waste by particle size or by their gravitational or electromagnetic characteristics or by chemical composition takes place. Then the selected products are sent to a multi-stage selective magnetic separation, which includes weakly magnetic high-gradient and magnetic separation in a running field, at the first stage of which the main part of iron oxide is separated into the magnetic fraction in a weak magnetic field. The non-magnetic fraction is sent to the second stage of high-gradient magnetic separation, where a part of the iron-containing components that are in joints with rare earth and other precious metals is separated. The non-magnetic fraction after high-gradient magnetic separation is a ready-made raw material for obtaining building materials, the magnetic fractions after the first and second stages of magnetic separation are combined and fed to a separator with a running field, where the division into strongly and weakly magnetic fractions takes place. The strongly magnetic fraction is a ready-made metallurgical raw material, and the weakly magnetic fraction concentrates the main part of rare earth and other precious elements, which are then sent to hydrometallurgical extraction (Russian patent for the invention Mo 94018733).

The disadvantage of the known method is that the extraction of the useful component is carried out only with the help of magnetic separation, in which magnetically susceptible particles are extracted with the help of low-gradient separators, and particles with weak magnetic susceptibility are extracted with the help of high-gradient separators. According to the above, when implementing the technological mode provided by the method, it is necessary to use a large number of magnetic separators, the magnetic system of which provides for the possibility of extracting useful components with different magnetic susceptibility.

The method does not provide for the possibility of effective extraction of non-magnetic particles of non-ferrous metals and is characterized by significant losses of the useful component in the enrichment tails.

The closest technical solution, chosen as the closest analogue, is the method of processing metallurgical slags, which consists in the fact that slags are transported from the dump to the loading platform, where they are crushed, manually selected for large metal scrap and separated from large scrap with a permanent magnet.

Then the slag is crushed to a size of 0-5 mm and sent to dry magnetic separation, which is carried out with the help of a drum separator working on permanent magnets. The separated slags are then sent to the density separation unit, where metals, alloys and oxides are separated depending on their density. Denser metals and oxides will sink to the lower layers, while less dense ones remain in the upper layers. Extracted substances are separately stored and sent to the sintering production site, where the process of obtaining metal-containing substances of agglomeration products, namely briquettes or pellets, is carried out. After that, the obtained agglomerate is sent to the line for receiving ingots for steelmaking redistribution (Russian Patent No. 2645629 for the invention).

The disadvantage of the known method is that its implementation involves the presence of manual labor, which

Zo significantly reduces the productivity of the process of beneficiation of raw materials from man-made deposits.

The method involves the layer-by-layer separation of non-magnetic materials during their separation, which causes a decrease in the homogeneity of the physical and mechanical properties of the enriched products, which are submitted for further processing and extraction of the useful component.

The basis of the useful model is the task of improving the technology of enrichment of raw materials of polycomponent man-made deposits due to: - double screening of the input product; - allocation of three ranges of fractional composition, one of which is intended for disposal, the second - for enrichment, and the third - waste product; - separation of the enriched product of the fractional composition (-15--5) mm; - crushing of the enriched product to a fraction (-3) mm with separation of the dusty fraction; - crushing of enriched product to fraction (-0.5--0.02) mm with separation of dusty fraction (-0.02) mm; - supply of enriched product fraction (-0.5--- 0.02) mm to magnetic separation; - formation of three technological flows: tailings of enrichment, metal-containing particles of high density and industrial product, which contains magnetically resistant metal particles; - separation with the help of sieves of the industrial product obtained by magnetic separation into separate fractional flows of the regulated range; - submission of each technological stream, which consists of the appropriate fractional range, to pneumatic separation, as a result of which a product of metal-containing magnetoresistant particles of high density and enrichment tails is obtained.

The task is solved due to the fact that the method of enrichment of raw materials of polycomponent man-made deposits includes extraction of the input product, its crushing, grinding and enrichment using magnetic separation to obtain magnetic and non-magnetic products.

According to a useful model, the input product is subjected to double screening, as a result of which three streams are obtained, one of which is the under-sieve product of the class (-5) mm, which is sent to the warehouse for disposal as a building material, the second stream is the over-sieve product (415) mm, which is directed by circulation to the warehouse of the input product, and the third stream (-15--5) mm, also above the sieve, is directed to the technological conveyor for placement in the storage hopper.

From the storage hopper, the product is crushed on a rotary crusher to obtain a product of (-3) mm fraction, as well as a dust-like fraction. The dusty fraction is concentrated in the dusting chamber and sent to the warehouse.

The product of the (-3) mm fraction is concentrated in a storage hopper, from which it is fed to the mill for grinding to the (-0.5--0.02) mm fraction. The formed dust fraction (-0.02) mm is sent to the dust settling chamber, from where it is transported to the warehouse.

The resulting product fraction (-0.5--0.02) mm is sent to magnetic separation, as a result of which a magnetic product is obtained. The magnetic product is sent to the warehouse of magnetic products.

The non-magnetic product is submitted to electrostatic separation, which separates the initial product into electrically conductive and intermediate products. The resulting electrically conductive product is sent to the warehouse, and the intermediate product is further enriched by separating the particles according to geometric parameters and density.

To do this, the intermediate product is first fed to the screen, forming a stream of over-sieve product (10.45) mm and a stream of under-sieve product (-0.45) mm. The flow of the over-sieve product (10.45) mm is subjected to pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The product stream (-0.45) mm is fed to the screen, forming a stream of over-sieve product (40.4) mm and a stream of under-sieve product (-0.4) mm. The flow of the over-sieve product (40.4) mm is subjected to pneumatic density separation, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles are sent to the tailings storage.

The flow of the product (-0.4) mm is sent to screening, forming the flow of the over-sieve product (y0.35) mm and the flow of the under-sieve product (y0.35) mm. The flow of the over-sieve product (10.35) mm is subjected to pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The (-0.35) mm product stream is fed to the screen, forming an over-sieve product stream (0.3) mm and an under-sieve product stream (-0.3) mm. A stream of over-sieve product (40.3) mm is exposed

From the pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The (-0.3) mm product stream is fed to the screen, forming an over-sieve product stream (10.25) mm and an under-sieve product stream (-0.25) mm. The flow of the over-sieve product (10.25) mm is subjected to pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage.

The product stream (-0.25) mm is fed to the screen, forming an over-sieve product stream (40.2) mm and a sub-sieve product stream (-0.2) mm. The flow of the over-sieve product (10.2) mm is subjected to pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage. The flow of the under-sieve product (-0.2) mm, which does not contain a metal-containing component, is sent to the tailings

The technical result of the implementation of a useful model is that: - high productivity of the process of enrichment of raw materials from man-made deposits, whose useful components are represented by a wide range of metals of different values, is ensured; - compared to similar technologies, the process ensures high selectivity of the process when separating magnetic and non-magnetic products from raw materials; - the beneficiation process has a low cost and, depending on the parameters of the technological equipment, can be implemented in the form of a stationary or mobile complex, which can be installed in the immediate vicinity of the man-made deposit, formed as a result of the activity of metallurgical enterprises or mining and beneficiation plants of ferrous and non-ferrous metallurgy; - the method is implemented by a complex of equipment, which ensures high environmental friendliness of the process in the industrial region, minimizing emissions of dust and harmful gases; - the method allows to ensure a high degree of extraction of the useful component during the development of man-made deposits; - during the implementation of the method, a complex of commercial products is obtained, which include ferrous and non-ferrous metals, as well as raw materials for the construction industry.

The essence of the useful model is explained by the drawings, where in fig. 1 shows a part of the technological scheme of the raw material enrichment process; in fig. 2 - continuation of the technological scheme of the raw material enrichment process.

The method is implemented as follows.

Raw materials (1) for the implementation of the beneficiation cycle can be slags formed during the beneficiation of ferrous and non-ferrous ores, as well as slags of metallurgical enterprises formed during the smelting of ferrous and non-ferrous metals.

Implementation of the method can be carried out with the use of existing technological capacities or in the form of construction of new workshops that provide enrichment of man-made raw materials.

After extraction of the raw material (1), which is stored in sludge and slag storages, it is subjected to double screening (sieving) (2), which is performed on a double sieve screen.

As a result of screening (2) of the input raw materials, three technological flows are obtained: - sieved product with a class of fractions (-5) mm (3); - sieved product with class of fractions (-15--5) mm (4); - superlattice product class of fractions (i-15) mm (5).

Studies have shown that the first technological flow class fractions (-5) mm (3) can be used as a product for the manufacture of building materials in the form of blocks and other simple structures. The specified technological flow is directed to the warehouse (6). The second technological flow of the super-sieve product with a class of fractions (415) mm (5) represents large fractions, the processing of which requires additional costs, therefore, for economic reasons, it is returned to the place of extraction (1) for the next crushing. The third technological flow, class of fractions (-15--5) mm, (4) is a marketable product that enters the next enrichment.

The product with the class of fractions (-15--5) mm (4) is sent along the conveyor (7) to the storage hopper (8), the capacity of which meets the requirements for the productivity of the enrichment equipment and its uninterrupted operation.

From the storage hopper (8), the product is sent to crushing (9). The requirement for the crusher is to obtain the required range of fractional composition, namely to obtain the fraction product (-

From 5) mm.

Studies have shown that the product of the fraction (-5) mm, in relation to enriched slurries and slags of man-made deposits, is optimal for further crushing to the required fractional composition.

When obtaining such a product, the formation of a dusty fraction, which does not contain metal particles and which is concentrated with the help of a dust settling chamber (10), is inevitable, and is sent to the warehouse (12) on the conveyor (11).

The product of the (-5) mm fraction is fed using a conveyor (13) to the storage hopper (14), from which it is sent to the mill (15) for grinding, which produces a crushed product of the fractional composition (-0.5--0, 02) mm.

It was established that the product with a fractional composition (-0.5--0.02) mm is optimal for extracting the useful component by magnetic, electrostatic and pneumatic separation. When the particle size increases to more than 5 mm, the process of extracting the useful component becomes more difficult, especially the magnetically susceptible component during magnetic separation and the non-magnetically susceptible component during electrostatic separation. When the size of the crushed particles is reduced, there is an excessive destruction of the grains of the useful component with the formation of an excess amount of dust-like particles, which are difficult to separate with the help of pneumatic separation. The product (- 0.02) mm is dust-like and practically does not contain a portion of the useful component, including metal particles, which is economically expedient to remove during enrichment.

The product of fractional composition (-0.5--0.02) mm obtained as a result of grinding is subjected to magnetic separation (16), as a result of which the obtained magnetic product is sent to the warehouse (18) by conveyor (17) for further processing of the metal component.

The non-magnetic product of magnetic separation is a complex raw material that contains useful non-magnetic metal and mineral particles. The composition of this product includes metal particles of precious, non-ferrous metals and mineral particles, which can be used as a building material and raw material for the manufacture of cement.

Studies have shown that non-magnetic metal particles of precious and non-ferrous metals can be partially removed by performing preliminary electrostatic separation (19), with the help of which electrically conductive raw materials are obtained, which are sent to the warehouse (20), as well as raw materials for further processing.

Raw materials for further processing are moved using a conveyor (21) for further enrichment. The non-magnetic product is submitted to electrostatic separation, which produces an electrically conductive product and an intermediate product. The electrically conductive product is sent to the warehouse, and the intermediate product is sent to further enrichment.

Research has established that, compared to known methods of enrichment, the use of cyclic sieving, which is combined with pneumatic separation, is the optimal technological process that ensures the enrichment of the intermediate product.

At the same time, the specified raw material is characterized by a wide range of granulometric composition, therefore, during gross pneumatic separation, the formed flow will be characterized by significant clogging, which negatively affects the economic indicators of the next technological process of obtaining a commercial product.

In order to achieve high quality indicators, the maximum extraction of the useful component can be achieved due to staged pneumatic separation with the optimal range of particle size composition of the input raw materials obtained at the expense of staged screening.

The specified technology is implemented due to the fact that the intermediate product of fraction (-0.5-th- 0.02) mm (22) transported with the help of a conveyor (21) is subjected to screening (23) and at the same time forms a stream of super-sieve product of 10.45 mm , (24) which is subjected to pneumatic separation (25) by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are directed to the warehouse (26), and low-density particles to the tailings storage (27).

The obtained sub-sieve product (-0.45) mm (28) is fed to screening (29), forming a stream of super-sieve product (10.4) mm (30), which is subjected to pneumatic separation (31) by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks, while metal-containing particles are sent to the warehouse (26), and low-density particles that do not contain metal particles - to the tailings storage (27).

The obtained sub-sieve product (-0.4) mm (32) is fed to screening (33), forming a stream of super-sieve product (10.35) mm (38), which is subjected to pneumatic separation (39) by density, as a result of which dense metal-containing particles and low-density particles of hollow rocks, while metal-containing particles are directed to the warehouse (26), and low-density particles that do not contain

From the metal particles - to the tailings storage (27).

The resulting sub-sieve product (-0.35) mm (34) is fed to a screen (35), forming a stream of super-sieve product (10.3) mm (36), which is subjected to pneumatic separation (37) by density, as a result of which dense metal-containing and low-density particles of hollow rocks, while metal-containing particles are sent to the warehouse (26), and low-density particles - to the tailings storage (27).

The obtained sub-sieve product (-0.3) mm (40) is fed to screening (41), forming a stream of super-sieve product (10.25) mm (42), which is subjected to pneumatic separation (43) by density, as a result of which dense metal-containing and low-density particles of hollow rocks, while metal-containing particles are sent to the warehouse (26), and low-density particles that do not contain metal particles - to the tailings storage (27).

The obtained sub-sieve product (-0.25) mm (44) is fed to screening (45), forming a stream of super-sieve product (10.2) mm (46), which is subjected to pneumatic separation (47) by density, as a result of which dense metal-containing and low-density particles of hollow rocks, while metal-containing particles are sent to the warehouse (26), and low-density particles that do not contain metal particles - to the tailings storage (27).

The flow of the under-sieve product (-0.2) mm (48), which does not contain a metal-containing component, is sent to the tailings storage (27).

As research has shown, the stated ranges of the granulometric composition of sub-sieve and super-sieve products ensure the maximum extraction of a useful component from raw materials extracted from man-made deposits and ensure minimum costs associated with the following technological cycles of obtaining marketable products for the metallurgical and construction industries.

Claims (1)

USEFUL MODEL FORMULA 55 The method of enrichment of raw materials of polycomponent man-made deposits, which includes the extraction of the initial product, its crushing and grinding, enrichment by means of magnetic separation with the production of magnetic and non-magnetic products, which is distinguished by the fact that the input product is subjected to double screening, as a result of which three streams are obtained, one of which is a sieved product of class (-5) mm, which is sent to the warehouse for disposal as 60 building material, the second flow is a super-grid product (15) mm, which is sent by circulation to the warehouse of the incoming product, and the third flow (-15--5) mm is sent to the technological conveyor for placement in the storage hopper, while from the storage hopper the product is sent for crushing on a rotary crusher to obtain a product of fraction (-3) mm, as well as a dust-like fraction, which is concentrated in a dust settling chamber and sent to the warehouse, while the product of fraction (-3) mm is concentrated in a storage hopper, from which it is fed to the mill for grinding to a fraction of (-0.5---0.02) mm, and the formed dust-like fraction (-0.02) mm is sent to the dust settling chamber from which it is transported to the warehouse, while the obtained product Fraction (-0, 5--0.02) mm are sent to magnetic separation, as a result of which a magnetic product is obtained, which is sent to the warehouse of magnetic products, and the non-magnetic product is sent to electrostatic separation, which separates one product into electrically conductive and intermediate products, while the electrically conductive product is sent to the warehouse, and the intermediate product is enriched, separating the particles according to geometric parameters and density, for this, the intermediate product is fed to a sieve, forming a stream of super-sieve product (10.45) mm and a stream of the sub-sieve product (-0.45) mm, while the flow of the super-sieve product (40.45) mm is subjected to pneumatic density separation, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles - into the tailings storage, while the product flow (-0.45) mm is fed to screening, forming the over-sieve product flow (10.4) mm and the under-sieve product flow (-0.4) mm, while the over-sieve product flow (10, 4) mm are subjected to pneumatic density separation, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are directed to stock, and low-density particles - to the tailings storage, and the product flow (-0.4) mm is fed to screening, forming the over-sieve product flow (10.35) mm and the under-sieve product flow (-0.35) mm, while the over-sieve product flow (10.35) mm are subjected to pneumatic density separation, as a result of which the dense metal-containing particles and low-density particles of hollow rocks are separated, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage, while the product flow (-0.35) mm are fed to the screen, forming a flow of the over-sieve product (10.3) mm and a flow of the under-sieve product (-0.3) mm, while the flow of the over-sieve product (40.3) mm is subjected to pneumatic separation according to the density ZO, as a result of which the dense metal-containing particles and low-density particles of hollow rocks, while the metal-containing particles are sent to the warehouse, and the low-density particles are sent to the tailings storage, while the product flow (-0.3) mm is fed to the sieve, forming the over-sieve product flow (140.25) mm and the flow p of the sieved product (-0.25) mm, while the flow of the supersieve product (10.25) mm is subjected to pneumatic density separation, as a result of which dense metal-containing particles and low-density particles of hollow rocks are separated, while metal-containing particles are sent to the warehouse, and low-density particles - to the tailings storage, while the product flow (-0.25) mm is fed to screening, forming the flow of the over-sieve product (0.2) mm and the flow of the under-sieve product (-0.2) mm, while the flow of the over-sieve product (10, 2). does not contain a metal-containing component, is sent to the tailings repository.