Processing method of potassium production wastes
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.
The invention relates to methods of processing (recycling) of the clay-salt waste (sludge) manufacturers K-Mg ore and rock salt by the methods of enrichment, with the further processing of bulk concentrate of ways pyrometallurgical processing.
A method of obtaining collective concentrate for extraction of precious metals in patent No. 2284221 (publ. 27.09.2006), including the three-stage gidrotsiklonirovaniya sludge with the release of the concentrate, and the gidrotsiklonirovaniya come sludge with respect to solid and liquid phases T:W=1:3, gidrotsiklonirovaniya is carried out sequentially in 10-, 7 - and 5-degree hydrocyclones, and collective concentrate of clay-salt waste manufacturers potassium-magnesium ore and rock salt, (for extraction of precious metals), is a mixture of sedimentary and floatated materials, which are insoluble in water balance (N.O.) sludge. Unloading of the hydrocyclones of the first and second stage will unite in the concentrate.
The drain of the second stage gidrotsiklonirovaniya in the form of a solution of salt and floatated part of the CONCENTRATION sludge is directed to the third stage gidrotsiklonirovaniya. Here through the drain nozzle is allocated floatated fraction with natural and man-made organic and subsequent Association with concentrates (what athroscopy) hydrocyclones first and second stage gidrotsiklonirovaniya and the formation of collective concentrate. Through the sand nozzle, at the third stage, comes the salt solution, which is the tails enrichment process, and recycle sludge gallerycheck and flotation plants with a high content of natural and anthropogenic organics.
The disadvantage of this method is that recycling is subjected to only a part of the waste generated in obtaining collective concentrate enrichment.
The method for extracting precious metals from mineral raw materials containing chlorides of alkali and alkaline earth metals in patent No. 2291907 (publ. 20.01.2007), including gloriouse roasting, leaching the calcine and sorption of noble metals, and gloriouse firing expose mineral raw materials containing 7÷13% of the amount of chlorides of alkali and alkaline earth metals and spend it at t 600÷700°C, the leaching of calcine are diluted solution of Aqua Regia, and sorption of noble metals from the resulting pulp. Moreover, when the content in the treated mineral raw materials chlorides more than 13% are shaded excess chlorides, thickening of the pulp and the direction of the condensed product after drying gloriouse firing.
The closest present invention to the technical nature of patent No. 2385772 "Method of production of bulk concentrate for extraction of precious metals" (publ. 10.4.2010), including the three-stage gidrotsiklonirovaniya sludge, with a ratio of diameters nasdaw unloading < discharge and release of the concentrate, which is a mixture of sedimentary and floatated material T:W=1:1, dewatering, drying, granulation, and concentrate absoluut to the salt content of 20±5%, granularit to the size of the granules with a diameter of 8 or 15 mm, dried to a moisture content of 0.5%.
The disadvantage of this method of waste disposal is a small part of the waste when producing collective concentrate enrichment and its further processing pyro - and hydrometallurgical methods for the recovery of precious metals.
The invention solves the problem to provide a method of waste processing enterprises, processing K-Mg ore and rock salt with maximum utilization.
The technical result is the creation of a method of waste processing enterprises, processing K-Mg ore and rock salt with maximum utilization.
This technical result is achieved by a method for processing waste potash production, includes gidrotsiklonirovaniya sludge emitting concentrate dewatering, drying, granulation, and, gidrotsiklonirovaniya is carried out in 4 stages, with the temperature of the slurry 40÷50°C, pressure 3÷5 ATM., when soo is wearing nozzles discharge: discharge to 1.14÷1,17, drying of the granules occurs at 1150÷200°C. Calcination of the pellets is carried out at 1650÷950°C.
Distinctive features of the proposed method is that the gidrotsiklonirovaniya is carried out in 4 stages, with the temperature of the slurry 40÷50°C, under a pressure of 3-5 bar., and the ratio of nozzle discharge: discharge is (1,14÷1,17):1, drying the granules occurs at t 150÷200°C, calcination of the pellets is carried out at 1650÷950°C.
The proposed method of processing ensures maximum utilization of waste potash production, which is ensured by changing process parameters enrichment method gidrotsiklonirovaniya (ratio nozzles discharge: discharge, pressure feed pulp to the gidrotsiklonirovaniya), the change in temperature when hydrocycloning, filtering preconcentrate and inclusion in the recycling process glorieuses firing, which in the prototype no.
These changes of parameters yield a useful product (cinder) 80-95%. Pulp mill tailings, settles and is condensed portion is returned to the head of process at the first stage gidrotsiklonirovaniya to extract in bulk concentrate (sludge and potassium chlorides.
The final product of the recycling process - the candle is composed of properties, giving it a quality of complex fertilizer of prolonged action. This SL is blowing components: 1) nutrients (K, Sa); 2) trace elements (Fe, B, Cu, Zn, Mn), the content of which reaches 0,1÷0,3%; 3) trace elements in lower concentrations (Co, Mo, Se) 0,001-0,0001%; 4) reclaiming components (anhydrite, dolomite).
The method is as follows. Sludge resultatives water to T:W of 1:2 to 1:2,5. Next, the pulp goes on gidrotsiklonirovaniya. The gidrotsiklonirovaniya cooked pulp is carried out in 4 stages on 10-, 7-, 5-, and 5-degree hydrocyclones. At the first stage gidrotsiklonirovaniya, pulp is fed at a temperature of 40÷50°C, pressure 3÷5 ATM. Table 1 shows the results gidrotsiklonirovaniya to obtain preconcentrate. The authors found that the optimal ratio nozzles discharge: discharge at all hydrocyclones is the following: (1,14÷1,17):1. This ensures the output preconcentrate 80÷90% of the original pulp. The ratio of the chlorides of potassium and sodium in the recycling process changes. The ratio of the chlorides of potassium and sodium in the original sludge can range from 1:0.9 to 1:0.6mm. When hydrocycloning the ratio of the chlorides of potassium and sodium can vary depending on the temperature regime, keeping a larger share of chloride of potassium. In the feedstock, this value is KCl:NaCl=1:0,7 (table 2). Preconcentrate after gidrotsiklonirovaniya, with a water content of 30-40% is filtered in filter presses, and the temperature of the slurry 40÷50°C. The resulting product is characterized by a moisture content of 18-25%. The product is then granulated and dried. In the granular concentrate enrichment) the ratio of chlorides of potassium and sodium is 1:0,3÷1:0,4 (table 3).
In other words, the main purpose of the processes gidrotsiklonirovaniya and filtration is the removal of sludge sodium chloride and excess moisture with conversion of the material in the viscous mass is suitable for granulating and drying in a rotary kiln at t 150÷200°C. the Granulation of the obtained product and the drying is completed the process of obtaining a concentrate enrichment, in the form of granules ready for further processing.
The technical essence of the removal of part of the NaCl in the tails when hydrocycloning and in the filtrate, and the subsequent filtering preconcentrate in filter presses, based on the difference in temperature coefficients of solubility of the chlorides of potassium and sodium in their joint presence, i.e. in the system KCl-NaCl-H2O". When the temperature rises from 20÷25°C to 90÷100°C all the chlorides of K and Na are dissolved. Upon cooling of this hot solution of 40÷50°C it becomes supersaturated relative to the potassium chloride, which will crystallize, and the sodium chloride will remain in the solution (http://www.okade.ru/agrohimiva/855-proizvodstvo-kalivnyh-udobreniv-i-ih-svoystva-chast-l.html).
Therefore, after heating the slurry, followed by the cooling, applying for the gidrotsiklonirovaniya and then filtering, potassium chloride crystallizes and remains, respectively, in the unloading of hydrocyclones and cake after filtration, a solution of sodium chloride, respectively, goes to tails gidrotsiklonirovaniya and in the filtrate.
Next concentrate enrichment (granulate) is subjected to high temperature firing in calcining furnaces were at t 650÷950°C, to obtain a calcine, and solid-phase transformation of the minerals constituting the granules thus obtained product (cinder) has all the properties of complex fertilizer of prolonged action.
The technical result of firing is to transform under the action of high temperature mineral composition the CONCENTRATION of the sludge. This firing is fundamentally different from gidrotsiklonirovaniya and filtering, where there is just the separation of minerals in processing products with the removal of parts of sodium chloride in the tails. If the granular concentrate enrichment) is the whole range of minerals, the CONCENTRATION of sludge in the calcine appear newly formed minerals (pyroxene, melilite, leucite) and almost disappears sodium chloride and potassium chloride remains, in this case the residual ratio of the chlorides of potassium and sodium may be 1:0,1 (table 4). In tables 2, 3 and 4 shows the mineral composition of dehydrated sludge granulate obtained from it God is CA.
The main property of candle - strong communication (adsorption) instant (sylvite) and sparingly soluble (anhydrite, gypsum) components, as well as distributed with the mineral matrix. In turn, this strong bond of useful components with the mineral matrix provides a lower solubility of these components when making candle into the soil as fertilizer.
In other words, obtained as indicated above, the calcine is a complex fertilizer of prolonged action.
Fertilizers can be used for acid sod-podzolic soils of the Perm region and the North of Russia for grain, silage crops and perennial grasses. Fertilizer can be added to the soil once a crop rotation (4÷8 years). They can be used in three qualities: 1) as an ameliorant to neutralize soil acidity and improve agro-physical properties; 2) as potassium and calcium fertilizers prolonged action; 3) as the micro-fertilizer containing additives chalcophile elements (Cu, Zn), the content of which reaches 0,1÷0 3%. In addition to the basic elements distributed (Cu, Zn)fertilizer is present over a wide range of trace elements, used in fertilizers, it is Fe, In, Mn, and MIC the items, Mo, Se with lower concentrations (0,001÷0,0001%).
In addition, fertilizers can be used for perennial shrub crops.
Technical efficiency of the proposed method of waste processing potash production is that when using the maximum possible waste of potash production.
1. Method for processing waste potash production, including staging, gidrotsiklonirovaniya waste in the form of a pulp slurry with a selection of preconcentrate and tailings slurry, dewatering, drying and granulation of preconcentrate and subsequent drying of the granulate to obtain a concentrate, wherein the gidrotsiklonirovaniya carried out in four stages 10, 7, 5 and 5-degree hydrocyclones with the temperature of the slurry 40÷50°C, pressure 3÷5 ATM with a ratio of nasdaw discharge : discharge average (1,14÷1,17):1, drying of the granules is carried out at a temperature of 150÷200°C, and after drying the granules are fired at a temperature of 650 to 950°C.
2. The method according to claim 1, characterized in that after separation of preconcentrate slurry tailings defend and condensed part returns to the processing at the first stage gidrotsiklonirovaniya.
SUBSTANCE: method involves mixing of tail ends of flotation of coal froth and gas cleaning wastes and briquetting of the obtained mixture. Slurry and/or dust of gas cleaning is used as a binding agent at the following component ratio of the obtained mixture, wt %: gas cleaning slurry 40-75; gas cleaning dust 25-60. With that, gas cleaning dust is supplied at water addition, not more than 10%, over 100% of the binding agent, and after the obtained mixture is briquetted, heat treatment of briquettes is performed at the temperature of 200-400°C and further air cooling is performed. Tail ends of flotation of coal froth are supplied for mixing in the amount of not more than 70 wt % of total weight of the obtained mixture, and slurry of gas cleaning of electrolytic production of aluminium with humidity of not more than 80 %. As binding agent, it is possible to use dust of gas cleaning of electrolytic production of aluminium with content of resinous matters of 10 to 25%.
EFFECT: invention allows performing complex processing of secondary carbon-bearing wastes of electrolytic production of aluminium so that carbon-bearing briquettes with high consumer properties are obtained.
4 cl, 1 tbl
SUBSTANCE: method involves preparation of charge, its melting and oxidation of the obtained copper melt. Charge is prepared by classification of copper scrap and its cleaning from tin and lead solder, oxidation of copper melt is performed by batch supply to the melt of NaOH sodium hydroxide in the quantity of 0.5-3 wt % of the charge weight with simultaneous blowdown by means of oxygen-containing gas.
EFFECT: reduction of content of undesirable impurities in copper scrap melt; improvement of refining degree.
3 cl, 1 tbl
SUBSTANCE: method includes double-stage treatment of gases first in cyclones with return of trapped dust for melting process, then in metal fabric filters with dust production. After treatment of gases dust is removed from filters and further processed. At the same time dust after extraction from a metal fabric filter is loaded into a reservoir, binder is supplied, mixed to produce a paste-like mixture. Then the mixture is granulated to produce granules, which are dried and sent for further processing by chlorination. Using a suspension of sludge of carnallite chlorators makes it possible to additionally recycle wastes of magnesium production.
EFFECT: recycling of wastes in the form of granules in a titanium chlorator, reduced losses of valuable components, reduced pollution of environment.
5 cl, 2 ex
SUBSTANCE: method involves dipping of wastes into acid electrolyte, connection to a positive pole of an electric current source and performance of electrolysis with conversion of cobalt to a solution and tungsten to slurry. Electrolysis is performed using direct current. As electrolyte there used is 5-15% of sulphuric acid solution containing 2% of a reducing agent. As a result, tungsten is obtained in slurry in the form of tungsten carbide powder.
EFFECT: excluding formation of tungstic acid in slurry.
1 dwg, 1 ex
SUBSTANCE: invention refers to metallurgy of precious metals, and namely to processing of slurries and concentrates containing elementary silicon, carbon and platinum. Similar slurries are formed namely at dilution of platinum-containing cast-iron in sulphuric acid. Slurries are mixed with sodium carbonate at consumption of 120-150% of the weight of silicon and carbon in initial material and sintered at the temperature of 500-650°C during 1-2 hours. Sintered material is leached in water so that insoluble residue containing precious metals and being a concentrate of precious metals is obtained.
EFFECT: simpler technology and higher quality of concentrate.
1 tbl, 1 ex
SUBSTANCE: proposed method comprises stock pelletizing and two-stage high-temperature calcination. said stock represents red mud while high-temperature calcination is divided into oxidative calcination and reducing calcination processes. Note here that oxidative calcination is carried out at 1000-1150°C in airflow. Note also that reducing calcination is performed at 1100-1200°C using coke as reducer in amount of 45-55 wt % of the weight of pellets.
EFFECT: reduced content of sulfur, phosphorus and alkaline compounds, higher strength.
2 cl, 2 dwg
SUBSTANCE: method of lead extraction from lead wastes containing one or more of Pb, PbO, PbO2 and PbSO4 includes treatment with aqueous solution of citric acid with production of lead citrate. Then lead citrate is extracted from the aqeuous solution, and the extracted lead citrate is converted into Pb and/or PbO. The method for processing of lead accumulator batteries, containing or more of Pb, PbO, PbO2 and PbSO4 includes mixing of a paste of lead plates of accumulator batteries with the aqueous solution of citric acid for production of lead citrate. Then lead citrate is extracted from the aqueous solution, and lead citrate is converted into lead and/or lead oxide. Further Pb and/or PbO are included into a plate of an accumulator battery.
EFFECT: simplified process and its improved cost-effectiveness.
17 cl, 7 dwg, 8 tbl, 1 ex
SUBSTANCE: method for processing of copper-based electronic scrap containing noble metals, consists in the fact that the electronic scrap is exposed to oxidising melting to produce an alloy with copper content of 55-85 wt %. The produced alloy is exposed to dissolution by means of electrochemical dissolution in a sulphate copper solution at voltage of 0.8-1.5 V on electrodes with production of sludge containing gold and silver, and an alloy on the cathode, containing copper and palladium. This alloy is exposed to electrochemical dissolution in the copper sulphate solution at voltage of 0.3-0.5 V on electrodes to produce copper on the cathode and sludge containing palladium. At the same time the produced sludges without mixing are leached with sulfuric acid.
EFFECT: higher extent of copper and noble metals extraction from copper-based electronic scrap.
SUBSTANCE: method involves crushing chemical cells, leaching, magnetic separation and electrolysis. The cells are crushed and leached with water in an atmosphere of carbon dioxide gas without access to oxygen. Light fractions are then removed from the scrap by floatation. Filtration is then carried out. The filtrate is treated with sorbents. After filtration, the scrap is washed with water, dried and fragments of ferrous and nonferrous metals are removed by electromagnetic separation, and then leached with sulphuric acid solution. Sulphuric acid pulp is filtered through a filter with an inert material, a filter with a coal medium and a filter with a cation-exchange medium. Ions of row d and row p metals sorbed by a cation-exchange resin are selectively desorbed with sulphuric acid solutions. Solutions containing ions of row d metals are subjected to electrolysis, and solutions containing ions of row p metals are neutralised to pH 3-4 and treated with clay mineral sorbents. The precipitate after sulphuric acid leaching is leached with nitric acid solution; the undissolved manganese dioxide precipitate is removed and the filtrate is neutralised and acidified to pH 3. The precipitate is filtered off. The filtrate containing mercury ions is subjected to cathode reduction and the precipitate containing lead and silver chlorides is dissolved in nitric acid and subjected to cathode reduction in an electrolysis cell with separate deposition of metals on electrodes.
EFFECT: environmental safety of recycling any type of spent chemical cells.
SUBSTANCE: proposed composition comprises 3.0-5.0 wt % of dichlorisocyanuric acid soda as halogen-bearing compound, 0.5-1.5 wt % of thiourea as complexing agent and water making the rest.
EFFECT: higher efficiency of removal mercury from soil, reduced aggressiveness of used substances relative to rooms interior, instruments and equipment.
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
SUBSTANCE: proposed method comprises heating the reaction mix in assembly consisting of two units composed of heaters and bubblers. Every of said unit is heated in turns to boil the solution and to direct live steam to bubbler of another unit. Proposed device represents the assembly consisting of two units composed of heaters and bubblers and integrated in a system by steam-gas pipelines. Note here that one pipeline is connected with bubblers while another one is connected with atmosphere. Shutoff valves and auxiliaries are fitted between units and pipelines. Proposed device may comprise shutoff valves automatic changer-over devices and their control unit.
EFFECT: maximum application of live steam heat, optimised thermal and hydrodynamic conditions, lower costs.
4 cl, 2 dwg, 3 ex
SUBSTANCE: method involves pulping a concentrate of platinum and rhenium sulphides in aqueous ammonia solution. The pulp is then treated with hydrogen peroxide solution; the reaction mixture is acidified with sulphuric acid, heated and then aged, and the precipitate of platinum compounds is separated from the rhenium solution by filtering the reaction mixture. The pulp is treated with hydrogen peroxide solution at temperature of 25-45°C; the reaction mixture is acidified with sulphuric acid until achieving pH 0.2-2.0 without preliminary separation of the undissolved precipitate. Before filtering, the reaction mixture is further treated with hydrogen peroxide solution.
EFFECT: enabling separation of platinum and rhenium at the step for extracting rhenium from a sulphide concentrate.
1 tbl, 1 ex
FIELD: oil and gas industry.
SUBSTANCE: method for obtaining and using products of hydraulic borehole mining involves drilling of production wells, water jet destruction of mine rock massif in the mineral deposit, hydraulic lifting along the well to the day surface of mine rock material, hydraulic transportation of mine rock material and its output in the form of a vertical fan-like pulp flow to the depositing site, catching from the pulp flow of a heavy ore-containing fraction, drainage of a hydraulic mixture of sand and clay via a drain channel to a sediment pond, clarification of water in the sediment pond, return of clarified water to a return water supply diagram of production wells. After gravitational separation on the depositing site of fractions of mine rocks, a turbulent flow of hydraulic mixture of sand and clay along spiral trajectory from the drain part of the depositing site is supplied by gravity tangentially to a hydraulic cyclone, where sand is deposited in an accumulating sump, where from it is pumped out by a pump. Water-clay mixture is supplied by gravity to a coagulation capacity, where accelerated deposition of clay into the accumulating sump takes place under action of gravitational forces, physical field and chemical reagent, where from it is pumped out by the pump. Clarified water is supplied by gravity to the return water supply diagram of production wells. Separated sand fraction is supplied to working face of production wells as an abrasive component of the jet and used for strengthening and disintegration of hard mine rocks. Separated clay fraction is used during drilling of production wells containing drilling and plugging compounds. The method is implemented by means of a device comprising a production well, a transport pulp line, a depositing site, a catcher of heavy ore-containing fraction, a transport system of water jet mixture of sand and clay. It includes a hydraulic cyclone and a coagulation capacity, which are made in the ground, near the lateral side of the depositing site. Wall of end face side of the drain part of the depositing site is made in the form of an opening branch of a spiral, the centre of which coincides with hydraulic cyclone centre.
EFFECT: improving efficiency of primary benefication of minerals on a production field at hydraulic borehole mining.
8 cl, 4 dwg