Method for integrated development of steam coal deposit
SUBSTANCE: method includes detailed research of material constitution of coal beds to detect metals of the platinum group that are subject to associated extraction. Selective mining of coal is performed, at the same time the coal with higher content of osmium is separately supplied to a coal-burning plant, such as a boiler house of the coal burning plant. The osmium-containing coal is burnt in a furnace of a low-temperature boiling layer of a water-heating or steam, boiler with at least double surplus of air supplied for burning, compared to theoretically necessary one, temperature in the volume of the boiling layer is maintained at the level of 800±50°C. Gaseous combustion products are sent into an emulsifier, in which from them they first remove large ash particles, then their contact is provided with a solution of alkali, such as NaOH; products of reaction of smoke gases with the alkali solution are discharged from the emulsifier and sent to recover osmium to metal.
EFFECT: invention makes it possible to increase efficiency of integrated development of steam coal deposits.
The alleged invention relates to mining, in particular, to the integrated development of coal deposits, and can be used in the development of deposits of coal, the coal composition of matter which is an element of the platinum group metal is osmium.
The known method is mined underground leaching, in which minerals are selectively dissolved in situ, and formed in the reaction zone of a chemical compound extracted to the surface. Underground leaching can be accomplished by traditional mining technology (when prepared in mine workings treatment blocks minerals or rocks are subjected to irrigation with appropriate solutions). To intensify the process of leaching using special bacteria or superimposed on the region of the extraction of minerals of different physical effects, for example, a heated solvent, preliminary roasting of minerals under the ground, passing electric current, and others . The disadvantage of this method is low efficiency of coal mining.
The closest analogue, taken as a prototype, is a method of integrated development of deposits of coal, allows the speaker to allocate raw material for production of platinum group metals. The method involves a detailed study of the material composition of the coal seams, the detection of platinum group metals, to be associated extraction, selective development of coal seam, the transmutation of elements of the platinum group metals in chemical compounds change their aggregate state by burning coal in a grate furnace boiler with the formation of gaseous products of combustion, the extraction of these compounds from the overall flow and recovery of valuable components .
The disadvantage of the prototype is that when using it you can't select the raw materials for such element of the platinum group metals as the OS, because the OS forms a volatile compound with oxygen at a temperature of about 800°C, and in the usual grate furnace combustion temperature of the fuel layer is much higher and the amount fed to the furnace air only provides an acceptable level of fuel combustion. Considering that the OS is widely represented in the samples of the Kuznetsk coal, and the cost for one gram of osmium by several orders of magnitude higher than the cost of coal, the loss of such a valuable component of the material composition of the coal reduces the efficiency of the integrated development of deposits of coal.
The purpose of the invention is the improvement of efficiency of complex development of the energy angle is with a high content of the element of platinum group metals, in particular, osmium by creating conditions of formation of volatile compounds of the metal with oxygen during the combustion of coal and carbon capture them from the products of combustion with subsequent recovery of osmium to the metal.
This goal is achieved by a method for integrated development of deposits of coal, including a detailed study of the material composition of the coal seams, the detection of platinum group metals, to be associated extraction, selective dredging coal with a high content of platinum group metals, a separate supply of coal on plesiosauria enterprise, the transformation of elements of the platinum group metals in chemical compounds change their aggregate state by burning coal in a grate furnace boiler with the formation of gaseous products of combustion, the extraction of these compounds from the overall flow and recovery of valuable components, oslistarray coal is burnt in the furnace of a low-temperature fluidized bed with not less than two abundantly supplied for combustion air, compared with theoretically necessary, the temperature in the volume of the fluidized bed is maintained at a level of 800±50°C, gaseous products of combustion are directed to the emulsifier, which of them first remove the large ash particles, then they provide contact with rest the rum alkali type of NaOH; the interaction products of the flue gas with an alkaline solution is removed from the emulsifier and is directed to the recovery of osmium to the metal in a known manner.
The method is illustrated by the diagram of combustion and trapping of the gaseous combustion products of coal.
The method can be implemented as follows. During the development of deposits of coal is the study of the material composition of the coal seams. The coal mined from seams (or from a specific layer of a layer by selective excavation) with elevated concentrations of osmium, separated from the General flow of the extracted rock mass and sent for processing to obtain omistamisega raw materials.
This can be used one of the hot water (steam) boilers, boiler room, which is part of this coal-mining enterprises, for example, the boiler type 1 representatives of the Committee (COC), equipped with a furnace NCTS (low-temperature fluidized bed), and an ash device 2, which can be used emulsifier.
Emulsifier 2 contains vertically oriented
a cylindrical housing 3, the dispenser irrigating fluid 4, the pipe 5 supply irrigating fluid, the vane swirler 6 gas pipe 7 for supplying the contaminated gas, the cyclone 8, bottom funnel 9, the nozzle 10 drain the fluid, the pipe outlet ash 11 and the outlet 12 of the drainage PTS the seal gas.
Vane swirler 6 made in the form of a hard disk to the hub 13 and the guide vane apparatus 14. Swirl 6 is installed in the inner space of the cylindrical body coaxially him. In the hub 13 of the swirler 6 through a bearing 15 mounted dispenser 4.
The dispenser 4 is made in the form of plates with conical bottom and an axis 16. The dispenser 4 is a top cone bottom, upward, and the axis 16 - down. On the axis 16 of the fixed blade unit (impeller) 17. Dispenser with 4 swirler 6 divides the internal space of the cylindrical body 3 of the emulsifier into two parts, upper and lower.
The pipe 5 is installed in the upper part of the body on its axis and is designed to supply irrigation fluid to the dispenser 4.
The cyclone 8 is installed in the lower part of the inner space of the cylindrical housing 3 coaxially him and has a diameter smaller than the inner diameter of the cylindrical body of the emulsifier.
The pipe 7 enters into the inner space of the cylindrical body 3 of the emulsifier hardline, i.e. along the chord, and in the cyclone 8 - tangentially, i.e. tangentially and are welded to the cylindrical housing and the cyclone on transitional lines of intersection of the cylindrical surfaces.
The operation of the boiler equipment to obtain omistamisega raw materials is as follows. When the supply to the boiler coal increased the th content of osmium one (or more) boiler with a firebox low-temperature fluidized bed are transferred to the combustion of coal.
When burning coal with a high content of osmium in boiling low-temperature layer (temperature in the layer is maintained at 800-850°C) to introduce an increased amount of excess air (at least two times more than necessary for complete combustion of the fuel); through the pipe 5 into the emulsifier serves irrigating liquid is an alkaline solution of NaOH. With this OS, which is part of the coal substance is sublimated in the form of osmium tetroxide (OSO4together with the flue gases leaving the boiler.
The pipe 7 flue gases pass into the lower part of the emulsifier 2, in particular, in the cyclone 8. In the cyclone 8 gas stream twists and centrifugal force pressed against the inner surface of the cyclone; under the action of friction of the solid particles lose their energy and the nozzle 11 are derived from the emulsifier. Cleaner, consequently, lighter part of the gas stream exits the cyclone 8 up. Because of the significant difference in the diameters of the inner surface of the cylindrical body 3 of the emulsifier and of the cyclone 8 gas stream at the outlet of the cyclone loses its energy. This leads to a twofold effect: gas cleaning from mechanical impurities, as the heavier impurities lose speed and fall further down; more uniform distribution of gas over the cross section of the housing. Due to the vacuum created in the emulsifier, for example,exhaust fans, the gas flow upwards and comes first on the blades of the impeller 17, and then into the annular gap between the cylindrical casing 3 and the spout 4. The impeller 17 and the dispenser 4 spin up. When irrigating liquid in the dish dispenser, under the action of centrifugal force falls off with the edge of the dish and into the annular gap, which has a blade unit 14 swirl 6. Due to the installation of the blades at right angles to the axis of the emulsifier of the gas stream passing through the swirler 6, is twisted in the direction opposite to the direction of rotation of the metering device 4, and the output meets with irrigating fluid, forming a stable, rapidly rotating layer of gas-liquid mixture - emulsion, which is whipped in a fine foam ring surrounding the space above the annular gap. Subsequent gas stream passes through the foam ring. This provides a guaranteed contact of flue gas with irrigating fluid. As a consequence, the osmium tetroxide (OSO4), interacting with alkali (NaOH), forms Promat Na[OsO2(OH)4] - raw material for production of osmium. In addition, the flue gases are cleaned from small mechanical impurities. The cleaned gases leave the emulsifier through the pipe 12, and Promat sodium in the form of waste emulsion - through pipe 10.
Setting qi is the womb of 8 in the lower part of the inner space of the housing 3 coaxially with him allows flue gas cleaning from mechanical impurities. In addition, achieved disorientation gas flow, whereby the gas more evenly along the circumference enters the annular gap between the casing 3 and the spout 4. Consequently, all of the blades 14 of the swirler 6 are ravnoduhsnymi gas stream.
The unwinding of the dispenser of the gas flow provides a more uniform inflow irrigation liquid (alkali) along the circumference of the annular gap and, as a consequence, stabilizes the height of the rotating emulsion layer, and it reduces the likelihood of leakage of flue gases without contact with the irrigation fluid.
Untwisting the flow of gas and the irrigation fluid in different directions increases the difference between the relative velocities of gas and liquid in the emulsification, providing increased foaming of the emulsion. The bubbles become smaller and their number increases, consequently, increases the surface area contact of the flue gases, in particular, osmium tetroxide - OSO4, with irrigating liquid (alkali NaOH), resulting in not only the education of paremata sodium - Na[OsO2(OH)4]but also better for gas purification from mechanical impurities, in particular, ash particles.
Thus, the goal can be accomplished: by burning omistamisega coal in the furnace of the fluidized bed created the conditions for the formation of the osmium tetroxide - volatile compounds of osmium with oxygen; by passing the flue gases through the cyclone installed inside emulsifier, provides a rough purification of gases from ash particles; by passing flue gas through the foam layer of alkali ensures the capture of volatile compounds of osmium and transfer them in a fluid state for subsequent recovery of osmium to the metal in a known manner.
Sources of information
1. They M.L. Technology, mechanization and organization of underground mining / M. Zhigalov, S.A. USSR author's certificate. - M.; Subsoil, 1999. - 423 S. (s - equivalent);
2. Method of integrated development of coal / Patent 2448250 of the Russian Federation, the application 2010141233, publ. 20.04.2012, bull. No. 11 (prototype).
Method for integrated development of deposits of coal, including a detailed study of the material composition of the coal seams, the detection of platinum group metals, to be associated extraction, selective dredging coal with a high content of platinum group metals, a separate supply of coal on plesiosauria enterprise, the transformation of elements of the platinum group metals in chemical compounds change their aggregate state by burning coal in a grate furnace boiler with the formation of gaseous products of combustion, the extraction of these compounds from obseg the flow and recovery of valuable components, characterized in that oslistarray coal is burnt in the furnace of a low-temperature fluidized bed with not less than two-fold excess of supplied combustion air, compared to theoretically necessary, the temperature in the volume of the fluidized bed is maintained at a level of 800±50°C, gaseous products of combustion are directed to the emulsifier, which of them first remove the large ash particles, then they provide contact with the alkali solution type of NaOH; the interaction products of the flue gas with an alkaline solution is removed from the emulsifier and is directed to the recovery of osmium to the metal.
SUBSTANCE: first preparatory field mines are driven - level haulage and ventilation drifts with identical geodetic elevations, block crossdrifts and accumulating drifts with an inclination for a self-flow transport, stripping wells are drilled at the right angle to the bed plane, then, line cuts are washed by the hydraulic method. Level haulage and ventilation drifts stretch at identical geodetic elevations to form a ventilation scheme with horizontal depression. The area of line cuts is increased to initiate the process of caving of a hanging massif in a stope. The stope bottom is formed by washing of line cuts with an inclination providing for accumulation of caved coal through self-flow. The caved coal is magazined to control shift of side rocks in the stope. Chambers that are adjacent to the mined space are separated by barrier sight pillars. Oversize material is crushed, and coal mass is periodically discharged in dosing manner into the accumulating drift to provide for stope bottom movement up the pitch.
EFFECT: elimination of air leaks through a mined space, reduced contamination of coal by caved rocks, higher reliability of breaking face functioning and labour safety.
SUBSTANCE: method to mine mineral beds includes separation of a mined area of a mine field into mineral columns, preparation of columns by means of arrangement of area developing entries, working of columns with longwall faces equipped with mechanised complexes and dismantling of mechanised complexes in dismantling chambers after completion of actual mining in the longwall faces. If a distance between the longwall face and the location of the dismantling chamber is more than the width of the zone of high stresses that arise in front of the longwall face bottom, at the border of the mined column in front of the longwall face bottom they drive an auxiliary dismantling mine. The bed is loosened in the area that adjoins the auxiliary dismantling mine at the side of the longwall face, by means of drilling of wells in the bed. Actual mining in the longwall face is continued until the auxiliary dismantling mine is stripped with its bottomhole. At the same time the width of the zone of loosened bed in the area that adjoins the auxiliary dismantling mine at the side of the longwall face is determined from the following expression.
EFFECT: reduced costs related to dismantling of a mechanised complex, reduction of time to perform dismantling works and their increased safety.
SUBSTANCE: method consists in identification of a length of active gas release zones, preparation of extraction pillars by tunnelling and strengthening mines in the rock massif, mining of extraction pillars and removal of methane in degassing wells. At the same time the length of active gas release zones is defined by variation of volume deformations of rock massif. At the same time the values of volume deformations of rock massif are produced by numerical methods on the basis of analysis of components of deformation and stress tensors with account of the time factor. The tensor characteristic is gas permeability of rocks under conditions of their natural occurrence. Medium values of rock massif gas permeability are assessed by the given mathematical expression. After determination of length of active gas release zones, with account of produced data, schemes of well drilling, their diameter and number are selected.
EFFECT: increased efficiency of methane removal, higher load at a working face and increased safety of clearing works by gas factor.
SUBSTANCE: method of layer mining of thick flat coal beds includes separation of a bed into layers, separation of layers into mineral columns, mining of layers with long working faces in descending order, leaving a layer-to-layer pack, with arrangement of developing ventilation and travelling roadways of the upper layer, leaving column-to-column pillars. Preparation of the mined layer of the extracted bed is carried out in pair mines, namely, with an area ventilation mine and an unloading mine near the ventilation one, an area conveyor mine and an unloading mine near the conveyor one, and unloading mines are tunnelled without supporting, outstripping the area mines, at the same time the distance between pair mines and the value of bottomholes outstripping of the unloading mines above bottomholes of area mines is determined according to formulas.
EFFECT: increased stability and manufacturability of mines arrangement in a mined layer, reduced losses of minerals when mining lower layers.
SUBSTANCE: method includes development of beds with longwalls along the strike using mechanised complexes. For this purpose during development of each underlying bed a longwall is arranged so that the remaining coal sight pillars near ventilation and conveyor drifts of the overlying bed are above the middle part of the extraction column, and extraction of coal beds is carried out in descending order.
EFFECT: higher safety of development of contiguous beds and lower labour inputs for roof management.
SUBSTANCE: between sub-levels and compensating gates dividing sub-levels into mining blocks there are furnaces with slope parallel to angle of formation of caved ground in mined area relatively to the line of bed course. Ventilation roadway for ventilating the below sub-level is made after mining and forced falling of the roof at above sub-level, note that above the ventilation roadway there maintained is a protective pillar that temporary prevents rock falling. In below sub-level the roof is controlled by stepped bypassing of caved ground from the above sub-level to bottom-hole area of below sub-level, exposed for allowable passage, note that allowable passage of roof exposure in bottom-hole area of below sub-level and corresponding extended distance between the blocks in comparison to the above sub-level is defined by the expression.
EFFECT: invention allows increasing coal production efficiency.
3 cl, 9 dwg
SUBSTANCE: method includes simultaneous coal extraction at upper and lower seams with advancing the broken working at upper seam and coal transportation to skip shaft from all longwall faces of worked-out seams of series. Penetration of vertical transportation blind pits from grouped field haul roadway to conveyor cross-cuts of all longwall faces is done at series travelling side. At series ventilation side there are vertical ventilation blind pits from grouped field ventilation roadway to ventilation cross-cuts of all longwall faces creating pyramid-shaped network of mines connected between themselves from lower to upper seam. The descending air stream from all series longwall faces is directed to ventilation bore through grouped field ventilation roadway made in the roof of upper seam. With the help of bulkheads with holes mounted in pyramid-shape network of mines there provided is a diagonal movement of air streams in the pyramid with exhaust of methane-air mixture from outgoing longwall faces and mines areas and formation of general mine ventilation air stream for extracting methane to the mine surface.
EFFECT: invention allows improving the efficiency of methane-air mixture exhaust from mine.
SUBSTANCE: method consists in mining of the deposit with wells, creation of a cavity, and destruction and change-over of mineral product to hydraulic mixture. Mixture is mixed and hollow rock is deposited at the bottom of the formed cavity; coal-water suspension is pumped out to the surface and transported via pipes to the consumer. In order to destruct mineral product, high methane content of coal beds is used; at that, methane content in the formed cavity is controlled; and when the most explosion hazardous concentration of methane, which is equal to 10%, is achieved in that cavity, explosion is initiated. After mineral product is delivered to the consumer, the whole cycle of works is repeated. In order to prevent methane ignition, its concentration is reduced to explosion hazardous one by releasing methane via wells to the surface to consumers.
EFFECT: invention allows increasing the safety and efficiency of mine works owing to using internal energy of mine rock massif.
SUBSTANCE: underground development method of the Elginsky coal deposit involves separation of the deposit into upper and lower formations, performance of paired tunnels and paired inclined working-outs, use of one branch of inclined working-outs and tunnels for coal transportation from loading points to coal-preparation plant, development of the deposit using an underground method sequentially in downstream order. Paired tunnels are performed on the lowest formation H2 of the northern deposit part to geological breakdown; cross galleries are made after geological breakdown out of tunnels transversely to the formation spread of the south-eastern part; those formations are opened with inclined shafts and worked out with a storeyed development system with coal transportation via inclined winzes and slopes to cross galleries, and then tunnels.
EFFECT: invention allows ensuring the efficiency of development of the south-eastern part of the deposit, complete extraction of coal and possibility of applying that method at any stage of the deposit development.
SUBSTANCE: before the face enters the formation roof, wells are drilled towards each other on the side of extraction gates, in pairs as to formation and parallel to the support line at the distance from the well projection to the bottom of formation to the nearest point of removal chamber, which is equal to 0.7-0.8 of periodic step of convergence of the main roof; they are charged and blasted after the support line, by means of which a support is created on the side of worked-out space for a hanging plate of the main roof throughout the length of face by using the roof rocks fallen during blasting operations. Coal pillar arranged between mechanised support and removal chamber is provided with artificial flexibility and extracted under protection of the plate of the main roof, which is borne against the rocks fallen during the well blasting operations. The specified artificial flexibility is provided for the pillar by drilling from removal chamber of wells at the formation roof towards the face.
EFFECT: considerable improvement of safe operations at entry of the complex into removal chamber in wide range of conditions of coal beds occurrence.
2 cl, 3 dwg
SUBSTANCE: method includes drilling of blast holes in an ore deposit, analysis of drilling sludge, delineation according to results of this analysis of zones, charging of wells by formation of explosive charges in them with differentiated specific consumption of explosives along dedicated zones. Then charges are exploded with ore disintegration and formation of cracks in the ore, leaching of gold from exploded ore by means of irrigation with leaching solutions of reagents and discharge of product solutions. At the same time the wells in zones with finely disseminated ore minerals and dispersed forms of gold location along a compacted network. Besides, in the central part of zones, when explosive charges are formed in them, they arranged containers that are coaxially built into each other with concentrated solutions of two types of reagents that form during mixing with explosive gases a highly active reaction mixture for oxidation of ore matrices that include dispersed gold. Explosion of the specified charges is carried out with moderation relative to explosive charges placed in wells that are drilled in zones with a vein nature of mineralisation and row shot, for formation of the highly active reaction mixture, which is injected into cracks by gases that are produced during explosion of explosive charges.
EFFECT: increased withdrawal of dispersed gold due to growth of efficiency of explosive treatment of ores for leaching.
SUBSTANCE: processing method of potassium production wastes involves stage hydrocyclonage of wastes in the form of slurry pulp with separation of preliminary concentrate and pulp of tail ends. Then, dehydration, preliminary drying, granulation and drying of preliminary concentrate is performed so that concentrate is obtained. With that, hydrocyclonage is performed in four stages on 10, 7, 5 and 5-degree hydrocyclones with pulp temperature of 40÷50°C, under pressure of 3÷5 atm at the ratio of unloading-to-drain head pieces, which is equal to (1.14÷1.17):1. Granulate is dried at 150÷200°C. After drying is completed, granulate is annealed at the temperature of 650÷950°C so that roasted product is obtained. After preliminary concentrate is separated, pulp of tail ends is clarified, and thickened part is returned to the processing process to the first stage of hydrocyclonage.
EFFECT: maximum waste utilisation; final waste utilisation product can be used as complex fertiliser of prolonged action, which is ensured with peculiar features of its composition and the state gained during waste processing.
SUBSTANCE: method involves mixing aqueous pulp of starting material with a dispersion containing colloidal magnetic particles and treating the obtained mixture in a magnetic field to extract a concentrate of the valuable component. The dispersion of magnetic particles is pre-stabilised by treatment in an aqueous medium with reagents of general formula A1-R-A2, where R is a hydrocarbon radical selected from C3-C18, A1 is COOH or CONOH, A2 is OH or CH(OH), or treatment in a liquid hydrocarbon medium with reagents of general formula A1-R, where R is a hydrocarbon radical selected from C3-C18, A1 is COOH or CONOH. After stabilisation, the dispersion is treated with a functionalising agent and mixed with the pulp of the starting material. Extraction of the concentrate of the valuable component and magnetic particles is carried out by deposition in a gravitational field in form of magnetic floccules with field strength of 80-880 KA/m or on magnetic separators in form of magnetic floccules with field strength of 32-800 KA/m.
EFFECT: high efficiency of extracting fine mineral particles using a technique for magnetisation with a magnetic colloid, followed by separation of the valuable component using magnetic techniques.
8 cl, 4 tbl, 5 ex
SUBSTANCE: method for silver flotation from acid cakes of zinc production involves introduction of a collecting agent - butyl xantate and a foaming agent - flotation oil to a flotation pulp of cakes. Prior to introduction of butyl xantate and flotation oil, pulp is subject to conditioning with tetrachloroethylene supplied in the form of water emulsion that has passed ultrasonic treatment.
EFFECT: increasing silver content in concentrate, which is achieved owing to removing elemental sulphur from mineral surface.
2 tbl, 1 ex
SUBSTANCE: method involves electrical blasting treatment of raw material with high-voltage electrical discharges. With that, electrical blasting treatment is performed for disintegration of clay aggregates to particles with the size that does not exceed 5-9 mcm. The proposed method is implemented at separate exit from a reactor of concentrate of fraction of coarse particles and discharge to a tray of suspension with fine particles of rock and thin gold with further deposition of thin gold on a mat in the tray and treatment of concentrate of coarse particles to obtain secondary products and extraction of gold. Concentrate of coarse particles is treated with chlorhydric acid, and the obtained calcium and magnesium chlorides are used as anti-icing materials, and gold is leached out of the deposition. Also, water is removed from concentrate of coarse particles, which contains carbonates, 1-2% of sodium chloride is added and baked during 1 hour at 850±50°C, and the obtained calcium and magnesium oxides are cooled down and leached; solution is used to obtain building mortars or raw material for binding materials, and gold is wholly leached from the deposition.
EFFECT: improving extraction of gold with fineness of less than 50 mcm.
3 cl, 2 ex
SUBSTANCE: proposed method comprises annealing of initial charge, selective leaching and analytical determination of noble metal content in produced solution. Charge annealing is performed in microwave frequency field without access of air at 550-600°C Annealed product is leached in steps by adding successive volumes of thiourea sulphide solution. Content of noble metal in obtained solutions is analytically defined to sum obtained values for determination of noble metal content in initial charge.
EFFECT: higher validity of estimation.
2 cl, 1 tbl, 2 ex
SUBSTANCE: method of noble metal extraction from solid stock comprises dissolving of noble metal and base metals in acid. Noble metal is extracted with the help of substituted quaternary ammonium salts (SQAS). Noble metal can be oxidised and reduced. Said substituted quaternary ammonium salts represent the following form H0-3R4-1NX, where H= hydrogen, R= organic group, N= nitrogen and X= halogen. This method uses, for example, tetramethyl ammonium chloride. Au-SQAS is separated by flushing with solvent. Rh-SQAS is dissolved in acid and oxidised to precipitate the salts, and separated. SQAS is added to filtrate and cooled to precipitate Rh-AQAS to be separated. Rh-SQAS is cleaned before formation of final product. Other metals are separated by boiling the initial acid solution with precipitation of metal salts, cooling and separation. The pulp is separated by dissolution and separation.
EFFECT: simplified extraction.
20 cl, 4 dwg, 4 tbl, 2 ex
SUBSTANCE: method includes dilution of platinum and rhenium by chlorhydric acid, two-staged solution treatment using sodium hydroxide at the first stage with formation of Pt(OH)4 particles and sodium thiosulfate at the second stage with formation of ReS2 particles. Solution treatment with reagents is performed upon availability of cellulose fibres in it with formation of hard products of reaction in the form of composite materials consisting of cellulose fibres with Pt(OH)4 and ReS2 particles immobilised by them at their chemical deposition. Extraction of composite materials from liquid phase at stages is performed using pressure flotation method.
EFFECT: reducing reagents consumption, simplifying process, providing possibility of process performance in continuous mode.
4 cl, 1 dwg, 3 ex
SUBSTANCE: method includes catalyst dilution in chlorhydric acid with palladium chloride and other metals solutions obtainment. Then three-staged treatment of solutions by sodium hydroxide with fibrillated cellulose fibres available in solution as sorbent is performed, composite materials being obtained at each stage consisting of cellulose fibres with metal insoluble compounds particles immobilised by them, at each stage composite materials are extracted by pressure flotation method.
EFFECT: simplifying process, increasing degree of palladium regeneration, utilisation of copper and aluminium and process performance in continuous mode.
5 cl, 1 dwg, 1 ex
SUBSTANCE: gold-bearing pulp from alluvial and ores is prepared, absorbent based on liquid hydrocarbons is used. Density of this absorbent is lower than density of the pulp. Then pulp contacts absorbent, during this process free gold transfers from pulp to absorbent. Free gold is extracted from absorbent by absorbent filtration in filter press. Volumetric contact of pulp with absorbent is performed due to pulp filtration in downward direction through at least one layer of absorbent, at that used absorbent has oxidation-reduction potential (Eh) not less than +1400 mV and is characterised by adhesion value to free gold not less than 40 Pa. Process efficiency of production plant for filtration-absorption extraction of gold from gold-bearing pulp is 800-1000 m3/day.
EFFECT: improving extraction efficiency of free gold of small, thin, pulverescent and disperse classes from alluvial and ores.
16 cl, 1 dwg, 5 tbl, 5 ex
FIELD: noble metal hydrometallurgy.
SUBSTANCE: invention relates to method for acid leaching of platinum method from secondary raw materials, in particular from ceramic support coated with platinum metal film. Target metals are leached with mixture of hydrochloric acid and alkali hypochlorite at mass ratio of OCl-/HCL = 0.22-0.25 and redox potential of 1350-1420 mV.
EFFECT: decreased leaching temperature, reduced cost, improved platinum metal yield.