Extraction method of iron-ore concentrate from aged alluvial tailings of wet magnetic separation of iron ores of skarn-magnetite type
SUBSTANCE: method involves drying of tailing massif, identification of an outline of supergene-converted horizon, separation of thickness of tailings into non-productive lean tailings from upper part of technogenic massives, which are not subject to supergene changes, and productive gothite-magnetite-hematite horizons formed during supergene conversion of technogenic mineral raw material, removal of upper non-productive horizons, extraction of gothite-magnetite-hematite horizon and its processing so that iron-ore concentrate is obtained. Iron-ore concentrate with total iron content of more than 60% is obtained by means of a gravitation-and-magnetic or magnetic method from gothite-magnetite-hematite horizon saturated with iron, which is formed in thickness of aged tailings.
EFFECT: improving efficiency of complex development of iron-ore deposits and processing of wastes of iron-ore production; reducing anthropogenic load onto ecosystems.
2 cl, 2 tbl, 2 ex
The invention relates to the beneficiation of minerals and can be used in the mining and metallurgical industry to extract iron from upstream tailings tailings generated in the enrichment process skarn-magnetite ores by the method of wet magnetic separation.
The known method is the extraction of hematite from the tailings wet magnetic separation of iron ores, including wet magnetic beneficiation of iron ore with production of magnetite concentrate and tailings, represented by hematite and martita where the original tails are subjected to the primary hydraulic classification in hydrocyclones with the release of the Sands in the tails, and plums are sent to the secondary hydraulic classification in hydrocyclones emitting drain in the tails. While Sands are sent to the control hydraulic classification in hydrocyclones with the subsequent direction of the discharge into the tailings and sand control and hydraulic classification are sent to flotation getting hematite concentrate and tails (1).
The disadvantage of this method is that it is used for processing the tailings wet magnetic separation of iron ores obtained immediately from the primary processing of iron ore (mainly ferruginous quartzite) and does not affect the involvement of old tailings placed in vodohranilisha.
There is a method of hematite ore beneficiation technological fields, which includes step-by-step process of crushing and magnetic flotation beneficiation process, with preliminary grinding of ore and the subsequent separation of the first and second stages, respectively, after the first and second stages of grinding, flotation, magnetic product of the second stage magnetic separation after the third stage of grinding (2).
The disadvantage of this method is the complexity of the processes of extraction of useful components, the complexity of the preparatory operations, the low efficiency. Also a disadvantage is the application of the method to the entire volume of ore contained in man-made array, without regard to secondary processes, leading to significant changes in the mineral composition of ore stockpiled tailings.
Analogues processing stale upstream tailings wet magnetic separation of iron ore skarn-magnetite type no.
Today, these old alluvial tailings magnetic separation of iron ores is not processed at all. They are industrial waste 3-4 hazard class, have a negative impact on the environment.
The iron content in old alluvial tailings obtained from the processing of iron ore skarn-magnetite type is substantial depends on the ore preparation. Preliminary crushing and pulverisation of the original ore is often accompanied by a change in natural morphology, particle size and Constitution of primary ferrous minerals until the appearance of newly formed phases, effects of amorphization, polymorphically, pseudomorphinae minerals, which significantly affects the efficiency of the separation of productive resources (3).
A new study (4) found that when fine grinding increases the defect structures of magnetite appears newly formed maghemite, increasing the heterogeneity of the oxidation of magnetite in maghemite, and then extracted. Especially intensive processes occur in deformed areas. It is established that the integrity of ferrous minerals significantly reduce the magnetic susceptibility and reduce the output of the magnetic concentrate. Accordingly increases the amount of ore passes in the tailings.
In 2010-2012, it was found that man-made deposits of alluvial tailings wet magnetic separation of iron ore skarn-magnetite type are not stable array, and are actively changing heterogeneous system (5). Under the influence of secondary processes in the context of upstream anthropogenic strata tailings forming two horizon.
Material composition of the upper horizon of the gene is automatically associated with magnetite-Martinovi type tails, coming together with the pulp in the tailings pond. In the lower horizon under intense impact of anthropogenic aquifer is the conversion of mineral mass tails, commonly develops replacement of magnetite by hematite, goethite and gidrogenit preserving forms of primary emissions. The most intensive processes of substitution occur at the base of the man-made solid tailings. Typically, the magnetite can be traced mesh and lattice structure collapse. Along directions octahedral separately formed hematite. The facets of one grain of magnetite can be modified in various degrees. With increasing depth there is the development of more complex secondary structures appear metacolloids (golomorfnogo) crypto-crystalline aggregates. The bulk containing ore minerals are, for the most part is an amorphous clay-ferruginous composition. In the result of the transformation of matter in stale tails is a new goethite-magnetite-hematite ore types with high iron content, a practice which can be gravity-magnetic or magnetic methods of obtaining saleable concentrate more than 60%.
Thus, in old alluvial tailings wet magnetic separation of iron ore skarn-intitulado type over time, a new type of mineral raw materials, suitable for industrial development, and it becomes possible recycling of manufacturing waste.
The invention solves the problem of disposal of process waste production and recycling of old alluvial tailings wet magnetic separation of iron ore skarn-magnetite type for the extraction of iron ore concentrate from iron-fortified goethite-magnetite-hematite horizon, formed in the thickness of technogenic deposits.
The technical result consists in disposing of waste production through recycling of old alluvial tailings wet magnetic separation of iron ore skarn-magnetite type with the receipt of iron ore concentrate from the goethite-magnetite-hematite horizon, formed in the thickness of the old tailings, reducing the environmental impact in the areas of industrial waste data.
This technical result is achieved in that the method of extraction of iron ore concentrate from old alluvial tailings wet magnetic separation of iron ore skarn-magnetite type, includes draining array tails, establishing a circuit supergene-transformed horizon (goethite-magnetite-hematite-type), separation column tails on unproductive poor, not affected by supergene changes in the tails of the top technology in the gene arrays and productive goethite-magnetite-hematite horizons, rich in iron, formed in the supergene process of converting mineral waste, the removal of the upper productive horizons, removing the goethite-magnetite-hematite horizon and its processing with the receipt of iron ore concentrate.
Removing the goethite-magnetite-hematite horizon from an array tails carried out by extraction of productive horizons. Receipt of iron ore concentrate from these horizons perform gravity-magnetic or magnetic method.
The method of extraction of iron from goethite-magnetite-hematite horizon stale upstream tailings is to carry out the following operations.
Draining old alluvial tailings wet magnetic separation of iron ore skarn-magnetite type of technogenic deposits. Drainage of the array produced by the pumping of free water through the sump. The number of dewatering structures can be one or several, depending on the volume of the drying sections.
The separation of old alluvial tailings on productive and non-productive horizons. The setting in array of old alluvial tailings formed in the process of storing the goethite-magnetite-hematite horizon. Determine whether the amount of iron content.
Development of goethite-magnetite-hematite horizon. Man-made reservoir is divided into the first is full-time blocks. Using earthmoving equipment top unproductive horizon technogenic sediments removed and stored in a pile on the free sections of the tailings, and goethite-magnetite-hematite horizon is retrieved to the surface. The extraction is carried out using a loading and unloading equipment.
The productive horizon is mined by dredges or direct the course of the excavator layers from the top down loading them into a vehicle and transported to the beneficiation plant. The vacated space in the blocks is filled with previously removed tails with poor content.
Extraction of iron ore concentrate with a content of total iron more than 60% of the goethite-magnetite-hematite horizon to produce enrichment plant gravitational-magnetic or magnetic method.
Formed during storage in upstream stale tails of wet magnetic separation of iron ore skarn-magnetite type a new kind of mineral raw materials goethite-magnetite-hematite type with a high iron content allows you to produce iron ore concentrate with iron content of over 60%.
As a test selected TMF JSC "Krasnokamensk mine, located in Kuragino the district of Krasnoyarsk region. Conducted the dehumidification unit TMF SPO is obom pumping water through the sump. Geological studies have shown that the power of the old tailings on the tested unit was 31 PM
The upper part of technogenic deposits in the interval from 0.0 to 10.0 m is characterized by the average total iron content of 17%. The mineral composition is represented by quartz 45%, hematite and magnetite 15%, albite 15%. The share of other minerals is 25%. According to the mineral composition of the ore mass refers to the goethite-magnetite-hematite type. Horizon refers to unproductive type.
The lower part of technogenic deposits in the range of from 10.0 m to 30.0 m is characterized by the average total iron content of from 29 to 35%. The thickness of the horizon is represented by siliceous-hypersalinity type formed by quartz 30%, magnetite 8%, hematite 12%, goethite 13.5 per cent, the share of other minerals is 12%. Ore mineralization has goethite-magnetite-hematite structure. There is a General replacement of magnetite by hematite, goethite and gidrogenit preserve the shape of the primary grains. The magnetite can be traced mesh and lattice structure collapse. With increasing depth of tailings in the tailings pond observed the development of more complex secondary structures associated with the formation of metacolloids (golomorfnogo) crypto-crystalline aggregates. The bulk containing ore minerals are, for the most part represents the isomorphous clay-glandular mass, in which microengineering analysis of the iron content is set to 26,66%, aluminum up of 46.06%. Hematite in the lower horizon tails is mainly the product of changes in magnetite (martitization), a mineral found in intergrowths with the latter. Marked partial and complete pseudomorphs of hematite to magnetite, as a rule, remains octahedral and cubic grains form. Resource potential in the lower productive horizon is estimated at 20000000 tons goethite-magnetite-hematite ore with a total iron content of from 29 to 35%.
Man-made reservoir was divided into blocks of size 10 x 10 m
Using earthmoving equipment top unproductive horizon was removed and stored in the collar.
Extraction of iron ore concentrate was carried out from productive supergene-preobrazovannogo horizon goethite-magnetite-hematite type in the interval from 10 to 30 m
Tests are performed on a bulk sample weighing 350 kg, selected from around the productive horizon.
Removing iron from the goethite-magnetite-hematite horizon conducted on gravity-magnetic circuit including ore pretreatment operation, coil separation and final gravity concentrate magnetic separation. Preliminary preparation of raw materials included: the disintegration and is classificatio material, followed by desliming material size -0,5+0 mm hydrocyclone.
Experimental tests of gravitational enrichment carried out on the spiral separator HG10S (Australia) on mycom poor product particle size of 0.5 mm and abaissement on the hydrocyclone rich product size and 0.5 mm In the result of the gravitational separation of man-made material received total concentrate containing 60,09% Fetotalextraction 47,62%. The output value is 20,96%. Improving the quality of the obtained product was carried out by finishing gravity concentrates size +0.5 mm and-0.5 mm for wet drum separator-analyzer SBA-0,6 M Studies were carried out at values of the magnetic field of 0.05 T and 0.1 T Of 0.25 Tesla.
Summary indicators of enrichment for the gravitational-magnetic circuit are shown in table 1.
|Summary indicators of enrichment for the gravitational-magnetic circuit|
|Name of product||Output %||Fetotal|
|Content, %||Extract, %|
|Concentrate gravity-magnetic separation||22,89||61,08||54,0|
|Σ Middlings (non-magnetic fraction)||11,4||31,2||13,7|
|Σ Final tailings screw separation||44,45||8,96||16,0|
|Galya (waste product)||3,76||28,1||a 3.9|
|Drain g/C||of 17.5||19,2||12,4|
|The original ore||100,0||26,0||100,0|
Analogously to example 1. The allocation of iron ore concentrate from the goethite-magnetite-hematite horizon was carried out using the magnetic circuit.
Enrichment was carried out on mycom poor product particle size of 0.5 mm and abaissement on the hydrocyclone rich product size-0.5 mm using a separator SBA-0.6 M at values of the magnetic field of 0.05 T and 0.1 T, followed by enrichment on a rotary electromagnetic separator with high-intensity magnetic field. With parace was performed at a magnetic field of 1 T, and then pricesales at H=0.5 T. Aggregates of magnetic enrichment are shown in table 2. The results of magnetic separation of man-made material received total concentrate containing 62,4% Fetotalextraction 45,54%. The output value of KZT 19.09%.
Summary indicators of enrichment on the magnetic circuit are shown in table 2.
|Summary indicators of enrichment on the magnetic circuit|
|Name of product||Output %||Fetotal|
|Content, %||Extract, %|
|Σ Concentrate||KZT 19.09||62,4||45,54|
|Galya (waste product)||3,76||28,1||3,90|
|Drain g/C||of 17.5||19,2||12,4|
|The original ore||100,0||26,07||100,0|
According to the results of x-ray phase analysis of the mineral composition of iron ore concentrate, extracted from the goethite-magnetite-hematite horizon, consists mainly of quartz, magnetite, hematite. The proportion of magnetite reaches 50%, hematite 30%, quartz 5%, goethite 2%. The share of other minerals is 13%.
The proposed method for processing of old alluvial tailings allows you to recycle iron ore production, to get additional iron ore concentrate with a content of total iron more than 60% of iron-fortified goethite-magnetite-hematite horizon, formed in the thickness of the old tailings, to reduce anthropogenic pressure on ecosystems, to improve the efficiency of the integrated development of iron ore deposits.
Sources of information
1. EN 2427430 A1, IPC WV 7/00, VS 1/00, publ. 08.04.2010.
2. EN 2383392, IPC WV 7/00, VS 1/00, publ. 2006.01.
3. B. I. Pirogov Technological Mineralogy of iron ore/ Bierhof, Gaspergou, Iphonesim, Vintersol. - L.: Nauka, 1988. -304 C.
4. Problems of directional changes t geologicheskikh and technical properties of minerals. - L.: Mekhanobr, 1985. - 136 C.
5. Celuk DI prospects of development of industrial waste iron ore production in Eastern Siberia / Dealloc, Intelec // proceedings of the Siberian branch of the Section of Earth Sciences natural Sciences. - 2012. No. 2 (41), p.142-150.
1. The method of extraction of iron ore concentrate from old alluvial tailings wet magnetic separation of iron ore skarn-magnetite type, including drainage of the array tails, establishing a circuit supergene-transformed horizon, the separation column tails on unproductive poor, not affected by supergene changes in the tails of the upper part of technogenic massifs and productive goethite-magnetite-hematite horizons formed in the supergene process of converting mineral waste, the removal of the upper productive horizons, removing the goethite-magnetite-hematite horizon and its processing with the receipt of iron ore concentrate.
2. The method according to claim 1, characterized in that the extraction of iron ore concentrate perform gravity-magnetic or magnetically.
SUBSTANCE: method includes erection of a dam on a coastal shelf in a zone of tide with formation of tide water accumulator, installation of an enrichment device of a lock chamber into a dam body with the possibility of tide water overflow into an accumulator and back, extraction of sands of beach deposits, their transportation to surface of the dam with supply to the enrichment device and further washing with reciprocal overflow of sea water, removal of the produced concentrate at the minimum level of tide. The complex of processing of metalliferous sands of the coastal marine shelf comprises a hydraulic engineering structure in the form of a dam made with a marine water accumulator, an enrichment device of a lock chamber type, installed in the dam body to form a through reciprocal overflow of the tide sea water into the accumulator and back, a classifier installed above the lock chamber higher than the maximum level of tide. The lock chamber is equipped with a catching cover.
EFFECT: development of a method and a complex for processing of metalliferous sands directly in a coastal area of a marine shelf with reduction of costs for water treatment and water supply for the enrichment process.
2 cl, 6 dwg
SUBSTANCE: in the method to mine gravel deposits, including contouring of balance reserves by data of exploration wells, opening of a sand bed, performance of opening and production works, after contouring of balance reserves the opening works are carried out with solid transverse trips into a dump to the level of the maximum elevation of the balance reserves contour. Production works are started by slabbing with a bulldozer in the area of the maximum elevation of the balance reserves contour with transportation of sands into a mined space. Each subsequent lifting of the balance reserves contour is mined in the similar manner, peats located between lifts of the balance reserves contour are transported through slabbing with secondary displacement into the dump.
EFFECT: reduced operational losses of a useful component.
SUBSTANCE: method includes backfill in worked-out area of small-grain dump and further backfill of pebble dump on its surface using mined rock removed upon processing of solid placer and consequent extraction of material from dump removing particles of gold. Before re-processing of dump works for coarsening of gold particles sizes are performed. Before backfill of pebble dump silt-settling tank is formed in near-bedrock part of small-grain dump, for which purpose a barrier is formed on bedrock surface from water-proof, covering perimeter small-grain dump. After backfill of pebble fraction on surface of small-grain dump, dump is exposed during the time interval required for flushing of dump space by non-ramming water flows, then the dump is frozen preferably in two stages. Upon extraction of material from the dump its volume located above volume of silt-settling tank is removed without flushing. In order to flush volume of the dump by non-ramming water flows, natural water-borne sediments and/or forced feed of water to the dump surface is used. During formation of water-proof barrier water-proof film material is used in addition.
EFFECT: higher gold extraction efficiency during re-development of gravel deposits.
5 cl, 3 dwg
SUBSTANCE: method for cleaning-up of ore bed reservoirs is performed by means of desalination. In this respect, hole-drilling of solid ore is performed, as well as its explosive rupture, filling of blasted capacity with working solution and egress of product solution. Besides, the outer configuration of blasted capacity is drilled around at an angle equal to slope angle of working ledge. Along the centre line of blasted capacity all the way down the cleaning-up of ore bed an efficient well is drilled. The rest of ore body is drilled around by closed parallel rows of vertical wells. While stable roach is being blasted, all the capacity of blasted ore bed, including its outside configuration, is drilled around by vertical wells of the similar depth.
EFFECT: ensuring stability of open pit side and rising safety level of mining operations.
SUBSTANCE: method includes separation of sands by quality by means of establishment of upper and lower limits of a producing part with different content of a useful component, further, after development of sands using the method of preliminary separation of coarse fractions, high-quality sands are supplied for enrichment, and an intermediate process reservoir, where low-quality sands are stored, is used for natural separation of rock and metal minerals by density in water medium and concentration of a precious component in a lower layer, then the upper layer is removed, and the lower concentrate layer from the process reservoir is sent for enrichment. Low-quality sands pass through additional stage of useful component concentration by natural separation of minerals by density, at the same time gold particles are concentrated in the lower layer, and clayey particles go into drainage.
EFFECT: improved performance indices of sands processing, reduced losses of fine gold, lower processed volumes.
SUBSTANCE: method involves delineation of balance and industrial reserves as per the data of exploration wells, drilling and mining activities; re-delineation of industrial reserves is performed after their delineation along the top of sands. At that, new contour at excavation of rock mass is set from cross point of exploration well with initial contour of industrial reserves at minimum elevation of balance reserves as to top of bed of sands to cross point of contour of balance sands-peat reserves at an exit angle of excavating transport vehicle of stripping equipment, and where there are no cross points of new contour with contour of balance reserves as to top of bed of sands - parallel to initial contour of industrial reserves.
EFFECT: reducing operating losses of useful component.
SUBSTANCE: method involves stripping operations, excavation and transportation of sands with bulldoser to vibration screen with further feed of sands to the receiving sump and further transportation to mineral processing equipment. Receiving sump is formed in the form of a pit drilled to the rock bed along the circuit of reserves and longitudinally separated with a pillar into two semi-pits: one is meant for sand storage, the other one is meant for boulders; screen is installed on sand supply side with possibility of its being moved along the pit with an inclination providing boulder movement to the second semi-pit.
EFFECT: increasing the efficiency of mining equipment at development of boulder gravel mineral deposits owing to extraction of boulders to specially prepared space.
3 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: invention relates to mining industry and may be used to develop natural and anthropogenic high-clayey gravel deposits of minerals with high content of fine and thin gold. The method of acoustic and hydraulic pulse softening and disintegration of high-plastic clay sands of gold-bearing placers includes placer opening, formation of an accumulator, softening of clay sands with the help of water supply and subsequent filtration process, assembly of a plant of discharge hydraulic transportation of the hydraulic mixture. Hydraulic washing of sands is carried out with subsequent free-flow supply of a hydraulic mixture into the accumulator and subsequent pressure hydraulic transportation of the hydraulic mixture to the system of washing and sizing, which is coupled with an additional accumulator by means of a mechanism that supplies the sized hydraulic mixture. Periodic acoustic exposure is carried out with directed radiation of 20 kHz frequency and intensity from 5 to 10 W/cm2 to a large-sized solid component of the hydraulic mixture in the additional accumulator before and after periodical hydrodynamic exposure of pulse loads generated in case of high-voltage electric breakthrough and producing voltage with exceeding the limit strength of the solid component of the hydraulic mixture depending on its water saturation. Number of charges is determined on the basis of the specific size of the largest piece.
EFFECT: increased efficiency of damage and disintegration of clay sands of placers.
1 dwg, 1 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to mining and may be used in developing natural and technogenic placer deposits of natural resources with increased content of fine and thin gold. Proposed method comprises deposit opening, producing sump, weakening rocks by feeding water and filtration, and mounting pipeline transport of hydraulic mix with pumps with hydrodynamic cavitation agitator. Pre-loosened mined rock arranged in sump first section by bulldozer agitator is subjected to ultrasound at frequency of 20 Hz and intensity of 10 to 20 W/cm2. Water is forced into sump first section in amount making 0.15 to 0.3 of volume content of rocks lumps at porosity of 26 to 40% to act by ultrasound with 20 Hz-frequency and 10 to 20 W/cm2-intensity onto hydraulic mix and feeding said mix to system of jetting and grading with pre-disintegration by hydrodynamic cavitation agitator. Simultaneously with loosening mined rock in first section, second sump section is filled with loosened mined rock. Jetting and grading with barren rock and feeding hydraulic mix in additional sump are performed for additional saturation with water. Water is additionally fed into additional sump with the solid-to-liquid ratio of 3:7 to act by ultrasound with 20 Hz frequency and 10 to 20 W/cm2 intensity onto hydraulic mix solid component in additional sump.
EFFECT: higher efficiency and environmental safety.
SUBSTANCE: method includes definition of coordinates of receiving hopper location and arrangement, definition of average transportation distance at specified receiving hopper location and on the basis of this information technical and economical parameters of ground development, rock straight movement towards receiving hopper by bulldozer, washing and extraction of mineral resource. Note that average transportation distance is defined as weighted average distance from receiving hopper to all points of the ground of random configuration and area S at zero point located at hopper location point.
EFFECT: improvement of excavation equipment effectiveness and decrease of daylighting and mining activities prime cost at placer mines development.
SUBSTANCE: proposed method comprises feed of wastes to feed conveyor and transfer to sorting conveyor. Wastes as separate fragments are fed one after another by batcher to at least seven section of sorting conveyer. Said fragments are radiated at conveyer head part by electromagnetic radiation directed upward to receive the picture of waste fragment as the coded signal. Fragment picture is scanned in the receiver, digitised and memorised. Received signal is compared by comparator unit with check signal. Said check signal corresponds to every standard size of waste fragment. Signal recognised by setting device is fed to receiver of working tripper corresponding to standard waste size to dump said waste fragment into appropriate bin. Invention covers also the device to this end.
EFFECT: automated process, lower labour input.
3 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to combined methods of separation of solid materials, particularly, to processing of radio electronic scrap. Proposed method comprises primarily two-step separation of solid materials by hammer crushers to required size, magnetic and screen separation of ground scrap with subsequent pneumatic classification by bulk density of oversize and undersize products of screen classification. Note here that ground scrap fraction of boundary size obtained at pneumatic classification is subjected to additional grinding at ball mill to size of nonmetallic component of not over 1 mm. To isolate metallic component of processed scrap aforesaid ground fraction is subjected to pneumatic classification by bulk density.
EFFECT: higher efficiency of processing.
SUBSTANCE: concrete recycling plant comprises a screen, an electromagnet and a system of water treatment, and also three technological chains. The first chain is a preparatory one and comprises hoppers for storage of mixtures, concrete, bricks, asphalt delivered by motor transport. The second chain is technological and comprises a plant for screening of heavy metal, the electromagnet for its trapping, a plant for sifting of sand and its storage into a hopper as a filler and a crusher for separation of concrete pieces from reinforcement joined with the second electromagnet. The third chain is a finishing one and comprises a reserve hopper connected with an impact-reflecting mill connected with the third electromagnet, and also comprises two screens connected with a system of water treatment comprising a mixer with a unit of wood chips and organic components supply, then a unit of fractionating, from where the treated items are sent to a warehouse of secondary fillers. To separate concrete pieces from reinforcement, a jaw breaker is used, comprising an electric motor with a pulley, an eccentric, movable and fixed jaws and a discharge window.
EFFECT: higher efficiency of broken concrete recycling.
3 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to power engineering, particularly, to recovery of power generating plant ash resulted from combustion of lignite and coal and may be used for separating ash-and-slag wastes into magnetic and nonmagnetic fractions without chemical reagents. Proposed unit comprises ash-and-slag wastes receiver, and interconnected magnetic separation and filtration devices. Said ash-and-slag wastes receiver is composed of flushing unit consisting of tank with mechanical mixer or water feed nozzles, and water feed pipeline. Magnetic separation device is composed of drum-type high-gradient magnetic separators of, at least, first and second stages. Additionally, said line is equipped with magnetic fraction grinder arranged between aforesaid magnetic separators. Disc vacuum filters are used for filtration of magnetic and nonmagnetic fractions.
EFFECT: higher efficiency.
FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy, namely, to processing iron ore concentration wastes. Method comprises magnetic separation to produce magnetic and nonmagnetic fractions, and their classification. Magnetic separation is carried out at magnetic field intensity of 15-17 thou oersted. Gravity concentration is carried out at the Knellson apparatus with extraction of light fraction and concentrate of noble, rare, dispersed, platinum metals, directed for double sequential processing at said apparatus. Said light fractions are integrated and separated in heavy suspension at Δ=3.0 with extraction of garnet and sand minerals with specific weight of 3.0 g/cm3 to be sixed to (0.5-0.15) mm, (5-0.5) mm and (0-0.015) mm used for production of construction materials as sand and concrete fillers.
EFFECT: higher yield.
1 dwg, 1 tbl, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to oil industry, particularly, to mobile plant for drilling mud and wastes treatment. Propose mobile plant comprises solid phase washing unit furnished with vibrating sieve, and cleaned water collection tank. Solid phase washing unit comprises cyclone-type sand separator incorporated with linear shale shaker-desander separator, and, at least, one buffer tank. Said vibrating sieve and shale shaker-desander separator are provided with water sprayers arranged above screen surfaces. Additionally, proposed plant comprises sold-phase loading unit provided with bin communicated with purified water collection tank and inclined screw conveyor to discharge deposited mud from bin. Besides, this plant includes liquid phase coagulation unit including steam heat exchanger communicated with, at least, one settling tank, sediment dewatering unit furnished with centrifuge, centrate collection tank, thermal desalting unit with reverse-osmosis membrane module and evaporation apparatus. Said units are communicated by pipelines and provided with pumps and gates.
EFFECT: higher efficiency.
12 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to coal-containing products separation and classification, particularly, wastes of thermal electric power stations. Proposed method comprises hydraulic classification of coal-containing product to slag and fly ash according to boundary class of 0.25 mm. Fly ash is separated before flotation into two fractions, according to boundary class of 0.05 mm, each fraction being conditioned by collector and foaming agent. Flotation is performed using column apparatus. Note here that flotation of 0.05 mm-class is performed in direct-flow section of column apparatus while flotation of fraction below 0.5 mm-class is performed in counterflow section. Slag is directed for grinding for cement production. Integrated concentrate of flotation in both sections is dewatered and directed for combustion as a fuel. Wastes of said both flotation sections are dewatered and used for cement production.
EFFECT: higher process efficiency.
4 cl, 1 tbl, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to concrete salvaging. Concrete salvaging plant comprises three process flows. The first, preparatory flow includes hoppers to store mixes, concrete, bricks, asphalt delivered by motor transport. The second process flow comprises heavy metal screen, heavy metal trapping electromagnet, sand separator to bring the sand into hopper as a filler, impact crusher to separate concrete lumps from reinforcements coupled with the second electromagnet. The third, finish process flow consists of backup hopper coupled with impact reflecting mill coupled with the third electromagnet. Besides, it includes two screens coupled with water treatment system incorporating chipwood and organic component feed unit and fractionation unit wherefrom processed articles are directed to secondary filler warehouse.
EFFECT: higher efficiency of salvaging, improved environmental conditions.
FIELD: process engineering.
SUBSTANCE: proposed process line comprises separators of large-sized products (LSP), ferrous and nonferrous metals. Note here that it comprises FHW receiving hopper, FHW height spring-loaded arresters, primary conveyor, scraper drum, wind tubes of high-pressure pressurisation for crushed waste filtration, high-speed manipulator for SHW gripping, vibrating separator with SHW conveyor, electromagnetic ferrous metal separators, drum crusher of waste remainders, auxiliary thin-belt conveyor with HF electrodynamic nonferrous metal separator. Besides, the line comprises cyclone to receive-and-separate wastes filtered out aerodynamically, which comprises cleaning auger with cutter and conveyor to feed sorted-out SHW into receiving hopper of pyrolysis device.
EFFECT: higher efficiency due to automated process.
FIELD: process engineering.
SUBSTANCE: invention relates to disposal of cold light lamps. Invention aims at increasing efficiency and reliability of scrap and gas treatment. Proposed installation comprises two units. First unit comprises lamp separator made up of loading assembly, pneumo vibration separator with crusher and cyclone, bin for crushed lamp glass, container to receive lamp bases and container for luminophor. Second unit consists of multistage off gas cleaning system comprising sleeve filter, adsorbers, gas blower with compressor to create rarefaction of 5…8 kPa in lamp loading zone and up to 19…23 kPa right ahead of gas blower to rule out dust and gas emission into production rooms. Besides, proposed installation is equipped with dust-and-gas emission purification system comprising cyclone, sleeve filers, adsorber running on active carbon to reduce mercury content in off gases to less than 0.0001 mg/m3.
EFFECT: reduced content of mercury in off gases.
FIELD: Utilization of wastes containing mercury.
SUBSTANCE: the invention is dealt with utilization of wastes containing mercury, in particular, with the device for extraction of luminophore from fluorescent lamps and may be used in an industry where it is necessary to separate dust-like substances from subjects. The installation includes a container performing a function of a crusher with the support structure, made in the form of a rectangular parallelepiped and mounted with a capability of rotation around of its longitudinal axis inclined at an angle of 45°. In the upper plane of the container there is a window for loading lamps. The support structure of the container includes timbered a fixed sheet abutting without a spacing to the upper plane of the container made with an aperture above which a loading cylinder is fastened. The container is divided into three sections by transversal lattices, and on a lateral wall of the container in its upper and middle sections at a level of lattices there are opening hatches for unloading the lamps pedestals and glass breakage. At that in the middle section there are jets installed for feeding compressed air as the counter-current streams, and the lower section is connected to the system of evacuation of luminophore into the storage. The technical result is reduction of expenditures on realization of the process of utilization and on production of the installation, and also provision of the best protection of the atmosphere and employees from mercury pollutions.
EFFECT: the invention ensures reduced expenditures on realization of the process of utilization, on production of the installation, and the best protection of the atmosphere and employees from mercury pollutions.