Method to prepare ore bodies in place of bedding to leaching of useful components
SUBSTANCE: method to prepare ore bodies to leaching of useful components in place of bedding includes installation of charges into well rings (11) in the central part of the ore body, explosion of the specified well rings and subsequent injection of a process solution into the central part of the ore body via perforation channels with the branching cracks along periphery of channels, formed by the upper part of the ore body with directed blasting Charges are installed with formation of a water circular gap between an explosive charge, bottom and walls of the well, after formation of a circular gap the well is filled with water or plugged.
EFFECT: invention makes it possible to increase opening of wells and evenness of distribution of a leaching solution in the ore body volume.
2 cl, 3 dwg
The invention relates to the field of Geotechnology and can be used for underground leaching of metals from ores, in particular, to the preparation of the ore bodies at the place of occurrence to leaching.
Known methods of underground leaching of metals [see Heap and in-situ leaching of metals / GD Lisovsky, D.P. Lobanov, V.P. the Nazarkin, and others/ edited by S.N. Volodya. - M.: Nedra, 1982, 113 S.]. Preparation of arrays of in-situ carry out blasting ways, reaching the ore crushing. Fragmented ore can be leaching in-situ.
A close method to the invention is a method of leaching metals disclosed in the patent RU 2105876, which includes an explosive showdown ore deposits with magazynowania ore and supply of technological solutions and electricity, while the leaching of metals are the coincidence with the direction of migration solutions and electric current to the direction of lamination leached minerals.
The disadvantages of these technical solutions include: conducting large amount of preparatory-threaded work in the underground space, the need to create a compensation space for magazynowania ore in the block, the complexity of providing uniform irrigation blasted ore throughout the area, the practical difficulty of implementing feed plants the Directors under pressure.
The closest to the invention is a method of explosive preparation of the ore bodies to the leaching of useful components, including the blasting hole fans on the shaking of the array in the Central part of the ore body and subsequent injection into the Central part of the ore body process solution through the perforation tunnels with the branching cracks on the periphery of the channels formed in the upper part of the ore body directed blasts (EN 2327864).
The disadvantages of this technical solution is the low level of disclosure of genetic cracks at the detonations fans wells in the Central part of the ore body and that leads to less uniform movement of fluids in the volume of the array and, consequently, to increase the time leaching of valuable components of the ore in situ.
The objective of the invention is the preparation of small ore bodies to leach from the place of their occurrence, providing the opportunity on the basis of application wells special design maximum crack, uniform distribution of the leach solution in the volume of the ore body, uniform areal irrigation array without magazynowania ore.
The problem is solved by the method of preparation of the ore bodies to the leaching of useful components in situ, including taladnoserv fans in wells in the Central part of the ore body, blasting mentioned fans wells and subsequent injection into the Central part of the ore body process solution through the perforation tunnels with the branching cracks on the periphery of the channels formed in the upper part of the ore body directed blasts, according to which, the laying of charges is performed with the formation water of the annular gap between the explosive charge, the bottom and the walls of the borehole, after the formation of a water ring gap hole filled with water and plugging.
The technical result provided by the proposed method is to improve the efficiency of crack growth by improving the energy efficiency of combustion of the explosive.
In the private embodiment of the invention on the walls of the wells pre-applied waterproof coating.
Figure 1 shows the General scheme of blasting. In Fig 2 (a and B) is a diagram bookmarks explosives in wells.
Positions in the diagrams indicate the following.
1 - rig itself;
2 - drilling section;
3 - rising for the evaluation of crack growth;
4 - cutting ORT;
5 - drill drift;
6 - ceilings for perforating irrigation;
7 - capacity to collect productive solution;
8 - camera under the district water is ornik;
9 - scraper drift;
10 - hole fan to create irrigation channels;
11 - fans wells, providing maximum disclosure of genetic cracks in the array, the design of these wells is shown in figure 2.
The method is as follows.
1. Carry out the driving of the necessary preparatory-development workings: drilling rising 1, the drilling Zachodni 2, the cutting ORT 4, drilling drift 5, scraper drift 9, or may use a previously completed production, if they provide access to the ore body.
2. In the Central part of the block leaching (ore body) with overlying workings are drilling vertical or inclined fans wells 11.
3. Part of wells drilled leave free. Available well play the role of the compensation space of detonations completed wells on the crack opening.
4. For part of the drilled wells, intended to fill the explosive consistently perform the following work, ensure when the detonations maximum crack opening. The device of these wells is shown in figure 2.
Assess the permeability of wells drilled.
When drilling in an easily filterable rocks on the bottom and walls of the wells of applied polymer composition by spraying. Can be used any polymer composition, the IP is with a leak from the well fluids. These provide an opportunity for further filling the well with water.
When drilling in truefilter rocks work on the creation of impermeable polymeric coating is not performed.
In wells place an explosive charge on the height of LBB. At the same time provide a gap between the explosive charge, the walls and bottom of the well.
The resulting gap is filled with water, forming, thereby, a water ring gap (figa).
After that, the formed hydraulic lock plugging. The space, located in the remaining (upper) part of the well fill slurry stemming, or leave an air gap.
Alternatively, after placing the explosive charge and the borehole is filled with water completely (figb).
5. The mouth is prepared according to claim 4 wells plugging.
6. Spend an explosion on the disclosure of genetic systems of cracks present in the array. Blasting when this is accompanied by an additional impetus to enhance the action of the blast wave.
7. Evaluation of crack produced by geophysical methods of specifically covered rising 3.
8. In the upper part of the unit remains disrupted by the explosion of the array and form the "irrigation" ceilings 6. To do this, from the top of the drill Zachodni (drilling ORT) drilling the holes, put the system kumul is effective charges.
9. Produce blasting systems, shaped charges, than provide formation aimed perforation channels with branching cracks on the periphery of the perforations. Bore-holes and perforation channels are used for injection under pressure or gravity feed solution under irrigation array.
10. The collection solution is produced in the chamber 8, which establish a precinct header 7.
The process of laying charges of explosives are illustrated in figure 2 (a and B).
1. Buryats inclined or vertical borehole, the length of which depends on the thickness of the ore body to be leached. Well perform deadlock with nezabarom in the lower part of the ore body. Value nedobora is determined based on the properties of the ore and host rocks.
2. The borehole is filled with water, forming a water ring gap.
When completing wells drilled in unconsolidated permeable ores, before filling with water at the borehole wall by spraying applied polymer waterproof structure.
3. Capsule with an explosive charge placed in a sealed waterproof case, which is placed in the aquatic environment.
4. After placing the charge in the mouth of the well plugging (figa) or filled with water (figb).
5. Produce an explosion with the power of providing for the disclosure of genetic is resin.
The laying of the charges carry out in such a way that between the explosive charge, the bottom and wall of the borehole water is formed an annular gap, which gives the effect of "fracturing". After plugging water-filled borehole is formed a limited amount of camera actions explosives, which provides greater energy efficiency of its combustion. In addition, when the plugging of the well formed by the reflected shock wave, forming a secondary effect on the borehole wall. This is when the detonations has the effect of "fracturing" of the environment, the higher the level of disturbance of the array and, as a consequence, the disclosure of a large number of cracks by thinning existing voids with water. In permeable ores before filling the hole with water at the borehole wall is applied to the polymer composition that prevents leakage of water from the well prior to blasting operations.
This inception of the shells, which realizes the effect of hydraulic fracturing, it is advisable to use for disclosure of pre ore and breccia post ore cracks, as well as existing in the ore dislocation arrays.
The invention can be applied to the deposits of copper, copper-zinc, lead-zinc, copper-Nickel and other ores for leaching of valuable components from small local ore bodies and individual ore the s plots left behind a path of development, to Refine ores leaching for recovery of valuable components from rich ores by leaching.
1. The method of preparation of the ore bodies to the leaching of useful components in situ, including the laying of charges in fans wells in the Central part of the ore body, blasting mentioned fans wells and subsequent injection into the Central part of the ore body process solution through the perforation tunnels with the branching cracks on the periphery of the channels formed in the upper part of the ore body directed blasts, characterized in that the laying of charges is performed with the formation water of the annular gap between the explosive charge, the bottom and the walls of the borehole, after forming an annular clearance hole filled with water or plugging.
2. The method according to claim 1, characterized in that the bottom and sides of the wells pre-applied waterproof coating.
SUBSTANCE: for realisation of the method, drainage-degassing wells are drilled in zones of higher cracking outside the limits of the prepared mine. Wells are drilled in the bottom-up direction in the close proximity to the profile of the prepared mine. Pumping of gas saturated drainage brines is carried out until the level of the depression curve is set below the horizon of breaking works, and it is maintained at this level for the entire period of mining. Besides, in process of wells drilling the minimum permissible distance to the profile of the prepared mine is accepted as 0.035 m per each running metre of the well.
EFFECT: method makes it possible to increase safety of underground mining works due to reduce amount of arriving fuel gas and natural waters to mines from deep and deposit-adjacent horizons of earth interior.
2 cl, 2 dwg
SUBSTANCE: method includes the following stages. Installation of a structure inside or tightly with an underground mine, so that the structure provides for reactive forces when pushing a cutting head in direction of the material by means of a series of rigid materials fixed on the structure, which i arranged so that series of rigid elements may be fixed to it simultaneously at least in two directions, so that parts of tunnel branches could be formed in at least two appropriate directions, of the underground mine designed for transportation of people, mechanisms and extracted material. Formation of multiple parts of tunnel branches entering the material. Formation of the first part of the tunnel branch with the help of a cutting head and a series of rigid elements in the first direction, and afterwards formation of the second part of the tunnel branch in the second direction. During formation of the second part of the tunnel branch, movement of rigid elements from the part of the first tunnel into the part of the second tunnel branch for extension of the series of rigid elements in the part of the second tunnel branch.
EFFECT: application of the method considerably reduces costs, makes it possible to considerably increase speed of tunnelling and increases efficiency of production.
21 cl, 10 dwg
SUBSTANCE: method involves separation of panels into individually ventilated blocks, in which second working and first working is performed. First working is ahead of second working at least by one block; at that, second working in adjacent blocks is performed simultaneously. Air supply and ventilation mine workings are routed along the panel boundaries. Each block of the panel is outlined on three sides with first block working. Panel and block mine workings are located symmetrically relative to the panel axis and connected to each other by means of cross passages made at the beginning of each of the blocks. Local ventilation plants are located in T-pieces arranged on the panel axis and on its boundaries at connections to main entries. Return ventilation air jet is removed from the T-piece to main entries through a crossing. The panel is developed in the direct order by means of subsequent development of blocks, and reserves of each of the blocks are developed in reverse order. Delivery of mined rock from the blocks is performed to two unloading points located at the connections to main entries.
EFFECT: increasing the panel productivity and reducing the time of its preparation and commissioning.
12 cl, 1 dwg
SUBSTANCE: method includes development of reserves from a border of an extraction column, drilling from surface of wells into the extraction column and primary setting of the roof. Wells are drilled to the rated line of the roof arch in one row in parallel to a stoping face in the middle part of the limit span of the main roof slab. Eutectic-hard-freezing solutions are filled into wells for the height of 1.5-2 m, rated time is maintained, which is required for melting of ice in cracks of roof rocks and formation of germinal slots, afterwards the wells are filled to the surface with the same solutions, and a hydraulic rupture is carried out in a rock massif.
EFFECT: invention makes it possible to ensure controlled primary setting of strong cracked rocks.
SUBSTANCE: method for shooting of ores and rocks on underground mining works includes drilling-off of a broken volume by opposite wells or blast holes, drilled from upper and lower drilling mines, their charging and exploding. An initiating charge in each well or blast hole is arranged at the distance La=2.25•dw, m from the bottom of the well or the blast hole, where: dw - diameter of a well or a blast hole, m, and distance between ends of opposite wells or blast holes determining thickness of a broken layer, is accepted as equal to L=2•Rr.e.+0.9•Do, m, where L - distance between ends of opposite wells or blast holes, drilled from upper and lower drilling mines, m; Rr.e. - radius of a damage zone from end action of a charge, m; Do - diameter of a bulk piece, accepted for the applied technology, m.
EFFECT: reduced specific and total flow rate of drilling, due to increased efficiency of using explosion energy.
SUBSTANCE: in the period of negative temperatures of ambient air from dehydrated dressing tails briquettes are pressed of ball shape with two diameters related with the following ratio: and volume of a filling material pressed in the form of briquettes of smaller diameter is determined according to the following formula: where Vvol - total volume of solid wastes supplied for briquetting. All prepared briquettes are frozen on the surface, mixed in hoppers with vibrators, transported and placed in a mined space of cleaning units. The ratio of this space filling with briquettes with identical diameter always makes 0.523. If for filling of the mined space a set of briquettes is used in two different diameters, then the coefficient of filling of the mined space will increase to the value of 0.597.
EFFECT: invention makes it possible to increase environmental safety of ore deposits mining in a cryolite zone due to increased volume of solid wastes return from dressing and higher extent of filling of the mined space by means of recovery of a permafrost massif in it.
SUBSTANCE: prior to start of filling works, a recumbent side of a section in a mined space to be filled is poured with water to form an ice crust, afterwards the mined space is filled with crushed dead rocks or frozen briquettes from dressing tails. The ice crust makes it possible to apply self-flow filling at the minimum angle of inclination of a recumbent side equal to αmin.=arctgKfr, where Kfr - coefficient of friction as the filling material moves along the ice crust on the recumbent side of the mined space.
EFFECT: invention makes it possible to increase efficiency of filling works when mining sloping and inclined ore bodies in a cryolite zone due to expansion of a field of application of a self-flow method of dry filling material placement in a mined space by reduction of resistance to motion of this material on a recumbent side.
SUBSTANCE: invention relates to mining, particularly, to sublevel working with sandstowing. Proposed method comprises working the block by odd and even sublevels in ascending order by counter short mining faces vented by all-mine drawdown. First, subdrifts and drops are worked. Seam is worked by counter short mining faces from flank slopes to central slope with direct-flow venting in advance preparation and working of odd sublevels. Mined-out area is filled with solid stowing while even sublevels between odd mined-out sublevels are filled with common stowing. In working, former vent heading is used as a belt heading.
EFFECT: higher safety and efficiency.
SUBSTANCE: mechanised longwall set of equipment for mining comprises sections of a powered support, a hydraulic cutting cleanout machine with actuators and hydraulic cutting heads, joined via metal tubes with a water-supply manifold, a hydraulic booster, a plane with two drives and a plate conveyor with load-carrying plates on rollers, and also comprises a transshipment platform with a mechanised sliding bottom. At the same time the set of equipment additionally comprises a scraper conveyor and a hydraulic support "Sputnik" structurally connected to each other by advancing rams. At both sides of the plate conveyor there are channel guides installed to move coalcutters along them with cable handlers. Besides, the coalcutter installed at the face side of the plate conveyor has a vertical upward direction of a cutting jib in parallel to the face line, and the coalcutter installed at the goaf side of the plate conveyor has a direction of a cutting jib in the bed plane along its border with the roof. The hydraulic machine of the set of equipment is fixed in the end part of the longwall face at the side of the transport mine, and hydraulic abrasive jets work in the transverse plane perpendicular to the direction of cut coal body displacement.
EFFECT: higher efficiency of a mining face due to reduction of duration of a process mining cycle.
4 cl, 14 dwg
SUBSTANCE: extracted core of expendable wells helps to define the outline of bed pinching-out at the area, inside the outline the limits of its standard power are registered and on the base of their average position of seam strike the contoured workings are passed. First cuts are located perpendicular to contoured workings upslope or down-dip and till the outline of bed pinching-out and separate the area to paired blocks. Beginning from the end of each paired block and by moving the front line of extraction by reverse movement there are adjacent extraction workings going from the first cuts to both sides with axes shift and parallel to contoured workings; adjacent extraction workings help to extract the bed selectively and are performed with ground and roof breaking, between the paired blocks there remained are solid blocks with width not more than 10% of abutment pressure zone. Each paired block has formed groups of under-goaf and one support solid block. During seam extraction there drilled are prognostic holes and control the degree of rock-bump hazard is performed, if it is revealed the support solid blocks are unloaded.
EFFECT: increase of safety of developing the area of flat and slope seam liable to rock-bumps and reduction of mineral product losses due to involvement of bed pinching-out areas into actual mining.
3 cl, 3 dwg
SUBSTANCE: flow line for year-round heap leaching of metals from ores includes the following serially installed components one after another: ore pile, a drainage system, a reinforced concrete pan, a pan board, a pump, a pipeline, a device for solution heating, a sprinkling system covered with a heat-shielding material, a device for collection of saturated solutions, a pump with a discharge pipeline, a complex of devices for collection and processing of saturated solutions. The line is additionally equipped with a heat and gas generator of a steam and air mixture, a system of vertical and inclined perforated pipes, installed in the pile and equipped with temperature measurement sensors, connected with a flexible link to a device of process monitoring and control. The heat and gas generator inlet is connected to the device of process monitoring and control, and the outlet is connected with nozzles fixed on top of perforated pipes. The device for collection of saturated solutions is arranged in the form of a sieve and two serially installed modules one after the other, the first of which at the inlet is connected to the sieve, and the second one equipped with heating elements for solution heating, at the outlet it is connected with the pump and the discharge pipeline, connected to the complex of devices for collection and processing of saturated solutions, at the same time the complex is installed in a heated room.
EFFECT: invention makes it possible to increase efficiency of a process of metal leaching from ores in the period of negative temperatures, environmental safety and reliability of a flow line.
2 cl, 2 dwg
SUBSTANCE: flow line for year-round heap leaching of noble metals in a cryolithic zone comprises a reinforced concrete pan with a board, ore pile filled on top of it, a drainage system installed underneath and connected with a complex of devices for operation in summer time, comprising a buffer reservoir serially connected with a device for noble metals deposition with self-flow pipelines, and the devices are arranged below the border of the seasonal freezing-thawing of soils, and also an auxiliary pump, a receiving reservoir, which communicates with a device for additional strengthening of the solution and the main pump connected by a discharge pipeline with a sprinkling system deepened into the near-surface layer of the ore pile, and also a complex of devices for operation in winter time, comprising the following components connected in series with additional self-flow pipelines and arranged below the border of seasonal freezing-thawing of soils: an additional buffer reservoir, the specified device for deposition of noble metals, an additional receiving reservoir, which communicates with the specified device for additional strengthening of solutions and an additional pump connected with an additional discharge pipeline via a device for solution heating with a sprinkling system. The specified device for deposition of noble metals is communicated with emergency pipelines to an emergency reservoir, an additional buffer reservoir and an additional receiving reservoir. The line is equipped with a heat-insulating screen and a heat-insulating jacket, with which the drainage system and the specified process equipment are separated from permafrost rocks of the cryolithic zone. Besides, the device for solution heating has a closed heat supply system, which connects in series a water jacket of a solid fuel gasifier and a water boiler of a heat generator, besides, the gas burners of the latter are connected by a gas flue with a gasifier, at the same time the drain nozzle of heat generator spent gas is connected with a gas duct via a distribution valve with a sprinkling system, comprising a gas duct in the heat-insulating coating of the sprinkling system at its far end.
EFFECT: invention makes it possible to increase reliability and efficiency of operation of a flow line of year-round heap leaching of noble metals under conditions of a cryolithic zone by maintenance of positive temperatures along the length of the flow line in the technological process of leaching by improvement of heat insulation of a working area in process of leaching and heating of a sprinkling system with hot gases during process interruptions of heated solution supply in winter time.
2 cl, 1 dwg
SUBSTANCE: invention includes injection of working agent solutions into a payout bed via a system of injection wells and pumping of products of reaction of rare metals with a working agent solution with the help of a submersible pump via a system of production wells, exposure of well bore and crosshole space to the field of elastic oscillations with the help of sources of elastic oscillations. At the same time operation of the production well is stopped for 3-4 hours, the submersible pump is withdrawn, and a well source of elastic oscillations is lowered into the well on a single-strand geophysical cable. The source of elastic oscillations is a well radiator of plasma-impulse effect, creating impulses of elastic field with a spectrum of frequencies in the range from several Hertz to several kiloHertz and energy of elastic impulses in the range of 1.0-5-1.2 kJ, with series of 10÷30 pulses with frequency of 2÷3 pulses per minute, power supply is provided via a single-strand cable from a surface source of current with frequency of 300-1,000 Hz. In process of wells treatment the radiator is moved with a pitch of 0.5÷1.0 m in the entire interval of the well filter, and after its withdrawal from the well the pump is lowered, and the well operation is resumed.
EFFECT: invention makes it possible to reduce costs for performance of method realisation technology and to increase its efficiency, to reduce dimensions and to simplify device design for its realisation.
8 cl, 5 dwg
SUBSTANCE: method involves crushing of raw material, its heaping in the form of a pile, pre-treatment of raw material in the pile, treatment of the pile with a leaching solution, dilution of metals and obtaining of productive solution with removal of metals from it. At that, pre-treatment is performed by supplying separate solutions or mixture of solutions containing surface active substance and hypochlorite to the pile. Treatment with the leaching solution is performed by means of the solution obtained by mixing in the pile volume at supply to it of separate solutions or mixture of solutions containing hypochlorite, surface-active substance and/or mineral acid. In the leaching solution there used are mixtures of mineral acids or in-series introduced mineral acids. Supply points of the above solutions to the pile can be different.
EFFECT: increasing the efficiency of the process cycle at reduction of costs and emission of hazardous gases.
5 cl, 9 tbl, 6 ex
SUBSTANCE: method of bath-well leaching of metals from ores includes treatment of mineral mass by solution of leaching in baths and metal winning from product solution. Baths are formed along leached mass, in the baths bottom a system of injection and extraction wells is built located above the level of bath with depth not less than the lower point of leached layer of mineral mass, and baths are filled with agglomerated mineral mass or pulp prepared in advance from extracted material, mineral mass in baths is treated by solution of leaching, and metal is extracted from product solution. Reusable solution obtained after metal extraction is strengthened or replaced with solution of another composition and is supplied to the system of injection wells for leaching of lower layers of material, then working solution is pumped off with leached metal through the system of extraction wells and metal is extracted from it; for leaching of lower layers of material solutions of environmentally safe chemicals, such as chlorides or thiosulfates, are used.
EFFECT: invention allows improving metal extraction efficiency.
SUBSTANCE: method for leaching of precious metals from technogenic raw material involves preparation of open working-out or capacity, waterproofing of its walls and bottom, arrangement of mineral mass in it, supply of a leaching solution, proper leaching and extraction of precious metals. The invented method differs by the fact that arrangement of mineral mass is preceded with construction in the working-out or the capacity of a system of pumping-in and pumping-out pipes perforated in lower part at the level of a future root system of plants, and after mineral mass is arranged, seeds of young plants are planted in its upper layer, which are capable of accumulating precious metals in their tissues; supply and removal of the leaching solution is performed through the system of pumping-in and pumping-out pipes after the stage of active formation of plant root system; at that, as leaching solution, active low concentrated leaching solution is used, which has passed photoelectrochemical treatment, and extraction of precious metals is performed by sorption or electric sorption of its diluted forms from pumped-out solutions and its extraction from plants extracted from mineral mass when they each a certain size.
EFFECT: invention allows improving the extraction of useful components.
SUBSTANCE: deposit development method using underground solution involves the following stages at which: pressure pipeline is provided, which is passed to mineral deposit containing the required mineral; at that, pressure pipeline is provided with possibility of supplying the discharged fluid to mineral deposit in order to dilute the necessary mineral and to form the extracted brine; extraction pipeline is provided, which is passed to mineral deposit and provided with possibility of supplying the extracted brine to the ground surface; discharged fluid is pumped to pressure pipeline; extracted brine is cooled during its transportation through the supply pipeline and one or more heat exchangers to separation plant; at that, cooling of the extracted brine leads to deposition of the necessary mineral, and thus formation of pulp consisting of solid crystals of the necessary mineral, which are suspended in brine; solid crystals of the necessary mineral are separated from brine in separation plant, thus forming the flow of depleted liquid brine and extracting the product in the form of solid crystals of mineral; depleted brine is transported through one or more heat exchangers to pressure pipeline; at that, discharged fluid contains the above depleted brine, and by performing the heat exchange between extracted brine and depleted brine in one or more heat exchangers in order to cool down the extracted brine and heat the depleted brine; at that, mineral crystallisation to the product in the form of solid crystals is performed due to temperature decrease of extracted brine, which takes place in the section between mineral deposit and separation plant due to heat removal from extracted brine; at that, heat removal from extracted brine is mainly performed due to heat transfer from extracted brine to depleted brine in one or more heat exchangers and heat dissipation from extracted brine to atmosphere when the extracted brine is being transported in extraction pipeline, one ore more heat exchangers and transfer pipeline to separation plant.
EFFECT: invention allows improving leaching efficiency.
21 cl, 3 dwg
SUBSTANCE: method includes drying of an industrial massif of stale tailings of upstream impoundments. Then the thickness of tailings is divided into non-productive strata including lean tailings from the upper part of the industrial massif, not exposed to hypergene changes, and productive strata from the base of the industrial massif enriched with gold and formed in the process of hypergene conversion. Then the circuit of the hypergene converted stratum is established. Afterwards tailings of upper non-productive strata are removed, and tailings of hypergene converted strata are processed. Processing is carried out by leaching with gold extraction. Gold extraction from tailings of hypergene converted productive strata is carried out with cyanidation.
EFFECT: invention provides for growth of gold production in sufficiently short periods due to simplified process cycle and reduction of time for preparation of secondary raw materials for processing.
3 cl, 1 tbl, 1 ex
SUBSTANCE: method involves construction of leakproof bottom, formation of ore pile on it, erection of sprinkling and drainage system, and in case of underground leaching - construction of pumping-in and pumping-out openings in ore deposit place; sprinkling of ore pile or supply to pumping-in openings of leaching reagent containing acid solution or acid solution in presence of reducing agent, so that production solutions containing nickel, cobalt, iron, aluminium and magnesium are obtained; their processing with extraction of nickel and cobalt; reinforcement of mother solutions with leaching reagent and their return for leaching. As leaching reagent there used are products of incomplete sulphur oxidation, which are supplied in the quantity sufficient for transition and maintenance of nickel and cobalt in the solution, as well as conversion of Fe3+ ions to Fe2+ in production solution, the pH value of which is maintained at the interval of values of 1.5-4.5, oxidation-reduction potential value is not more than 350 mV; at that, extraction of nickel and cobalt is performed using sorption, extraction and deposition methods with further reclamation of waste ore pile and reusable solutions or underground water involved in recycling.
EFFECT: increasing complete combustion of powder charges and efficiency of action of charges; increasing efficiency of extraction of nickel and cobalt; reducing consumption of acid and simplifying the flow diagram.
18 cl, 4 tbl, 4 ex
FIELD: oil and gas production.
SUBSTANCE: proposed device comprises water feed tube with bottom head Note here that the latter features length exceeding radius of reservoir and is made of flexible water feed tube furnished with mechanical muscles secured thereto and pneumatically or hydraulically communicated with pressure source to control every muscle for positioning tube end in space.
EFFECT: higher efficiency.
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