Method for lixiviation of metals from ores in pit edges
FIELD: mining industry, in particular, technology for extracting mineral resource deposits, possible use for extracting ores of balance and over-balance resources during extraction of mineral resources.
SUBSTANCE: method includes preparing the massif, supplying reagents, draining solutions, sedimentation of useful components. Ore sections of useful components are detected in massif beyond limits of pit contour above the level of depression cone. These massif portions in pit sides are subjected to explosive crushing, well is drilled to upper area of each prepared ore section, and then lixiviation solutions with reagents are fed into the well. Solutions, self-flowing downwards along ore section, lixiviate metal and then enter common flow of underground waters, formed by depression cone. Sedimentation of metal is performed in the pit on geo-chemical barrier, in place of common exit of subterranean waters.
EFFECT: ensured fullness of extraction and high efficiency when completing a formation in accordance to open method.
3 cl, 2 dwg
The technical field to which the invention relates.
The invention relates to mining, in particular to the development of mineral deposits, and can be used when extracting ores balance sheet and off-balance-sheet reserves in the development of mineral resources.
The level of technology
Analogue of the invention is a method of leaching (Extraction of uranium ore by underground leaching". M., 1980), including the injection of leaching agents and pumping productive solutions through wells and precipitation of useful components from the pregnant solution by carrying out chemical reactions.
The disadvantages are the counterpart:
A. Lack of controllability of the process due to the use of the main direction of movement of groundwater as a transport solution in the ore zone;
B. the Possibility of loss of reagent due to leaks along with controlled flows of groundwater.
The prototype of the invention is a method of underground leaching of metals (Ahrens WE geotechnological methods of mining. M., "Nedra", 1975, s-179), including the crushing of the array, the supply of reagents with a controlled their movement through the array through the use of infiltration flow under gravity from the irrigation device to the drain and Sardinia useful components from the pregnant solution by carrying out chemical reactions.
The disadvantages of the prototype are:
A. the High cost of the process discharge leach reagent and pumping productive solution for creating a managed flow through the array.
The elimination of defects can be achieved through the use of natural hydrogeological resource, expressed aimed constant for groundwater in the composition of the depression cone.
The challenge aimed invention is to provide a method of leaching the metal from the ore in the pit, providing increased efficiency of field development due to the passing involving off-balance-sheet metal stocks in forests career by leaching with the use of natural resource directional flow of groundwater within the depression cones formed in prakaranam space array field development by the open method.
During implementation of the invention can be obtained from the following technical results:
A. improving the efficiency of field development.
These technical results are achieved due to the fact that the leaching of metals from ores in the pit includes the preparation of the array, the supply of reagents, pumping solutions, precipitation of useful components and different t is m, what reveal ore lots of useful components in the array outside of the pit above the level of depression cones, these sections array in the pit wall is subjected to explosive fragmentation, drill a well from the surface to the upper region of each of the prepared ore area, then into the borehole serves leachate solutions with reagents, which, flowing down the ore area by gravity, leached metal and then join the General groundwater flow, forming a cone of depression, the metal deposition is carried out in a career in geochemical barrier in place overall yield of groundwater.
Features, distinctive from the closest analogue, expressed by the following set of features: "identify ore lots of useful components in the array outside of the pit above the level of depression cones, these sections array in the pit wall is subjected to explosive fragmentation, drill a well from the surface to the upper region of each of the prepared ore area, then into the borehole serves leachate solutions with reagents, which, flowing down the ore area by gravity, leached metal and then join the General groundwater flow, forming a cone of depression, the metal deposition is carried out in a career in geo is imagescom barrier".
With the aim of combining in-time production carrying ore directly into a career with the leaching of metals from ores in forests career and enhance and speed the leaching explosive loosening in the area of ore concentration exercise for the whole pit in the period when the plane surface of the depression cone is above the ore zone, and the flow of reagents produced during the lowering of the bottom of the quarry, when the plane surface of the depression cone passes through the field of ore concentration, while geochemical barrier plating periodically move along with the water drainage as reduction of mining operations. Explosive rock breakage of the array is carried out until the future of the circuit Board career with the increase in the rate of leaching by increasing the permeability of rocks to the leaching process was completed by the time the plane surface of the depression cone falls below the level of occurrence of ore concentrations in the Board's career when lowering the bottom of the quarry. The loosened rock pit will help to redistribute the flow of groundwater in the array. Since the flow velocity of groundwater in the more porous the array above, you will increase the rate of leaching and the amount of water which will pass through razryhlenie the plot Board. Through this site will be the main volume of groundwater. Geochemical barrier, which produce metal plating, moving together with the pumping of groundwater (at the bottom) as the reduction of mining operations.
To reduce the costs of exploration zones of ore concentrations, explosive training array, drilling supply wells and injection of the reagents into the upper region of each of the ore feed concentration of reagents in the array is performed with the surface, the low depth of groundwater depression cone, using the topography of the surface. Supply of reagents produced in the places where the plane of the surface of the depression cone fits most closely to the land surface. In this version lixiviants in the composition of groundwater depression cone pass across the array, the surrounding mountain development (quarry), and carry out the leaching of metal with subsequent removal to geochemical barrier in the field of drainage in the career.
Thus, the objective of the invention is resolved.
List of figures
Figure 1 presents a section of the quarry with the marginal contour of the end of the mine; figure 2 presents a section of the quarry in the stage of intensive lowering of mining operations.
Information, confirming the possibility of carrying out what retene
In figure 1, figure 2 shows the incisions career in various stages of development, containing career space 1, pit 2, the reserves of 3, off-balance-sheet reserves 4, the surface of the depression cone 5, wells for reagent supply 6, and a geochemical barrier 7.
The implementation of the method is as follows. When traditional development open method form the career space 1, pit 2, from which is extracted reserves 3. Outside of the pit 2 in the array remain off-balance-sheet reserves 4, the recovery of which in the traditional development is not carried out. Mining works in the field of career space 1 is necessarily accompanied by the pumping of groundwater. The removal of groundwater from the career space 1 forms a depression funnel 5 in the array. Below the surface a depression cone 5 hydrogeological regime of the array is not disturbed. Higher levels of depression cones 5 breed array dehydrated to the limit of natural humidity. In the surface area of a depression cone 5 is the most intense for groundwater in the direction of the point of drainage, which is available in the career space 1. The dimensions of the depression cone 5 and the flow velocity of groundwater in the surface area depends on pronice the spine of the rock massif. In the development process at the quarry, close to the limit, identify ore areas off-balance-sheet reserves 4 in the array above the level of depression cones 5 outside of the pit 2. Parts of the array with off-balance-sheet reserves 4 is subjected to explosive fragmentation to increase the permeability of the rocks. To each of the prepared ore site off-balance-sheet reserves 4 drill a well to supply reagents 6. Well for reagent supply 6 serves the reagent solution in the upper area of the prepared site off-balance-sheet reserves 4. The reagent solution flows through the array of plot from top to bottom and videlicet metal and flows into the flow of underground ore in the area of the depression cone 5. Together with groundwater dissolved metal enters the career space 1 in the area of drainage. Before removing from the quarry groundwater drainage are like through the material of geochemical barrier 7. On the material of the geochemical barrier 7 metal precipitated.
Extraction of metal from ore off-balance-sheet reserves 4 located outside of the pit 2, and possibly at earlier stages of development of balance reserves of 3 fields, after the bottom of the quarry falls below the groundwater level, and water drainage will be formed in the array depression funnel 5. As demotion mining surface Dept is essional funnel 5 will go down, and surface area of the most intensive groundwater flow in the array will cover the lower area of concentration of ore off-balance-sheet reserves 4. The irrigation areas of the array leaching reagents can be carried out as previously described (through wells), and by filing solution in the areas of the relief surface directly in the upper horizons groundwater depression cone 5 in places the surface outcrop. Since the rate of reduction of mining operations is relatively low, it is possible to conduct the process of dissolution of metal reagents and explosive loosening of the array and without preliminary exploration to identify sections of the ore off-balance-sheet reserves 4.
When carrying out the invention will have the following technical results:
A. improving the efficiency of field development.
1. Method of leaching of metals from the ore in the pit, including the preparation of the array, the supply of reagents, pumping solutions, precipitation of useful components, characterized in that reveal ore lots of useful components in the array outside of the pit above the level of depression cones, these sections array in the pit wall is subjected to explosive fragmentation, drill a well from the surface to the upper region of each of podgotovki the spent ore area, then, in a well served leachate solutions with reagents, which, flowing down the ore area by gravity, leached metal and then join the General groundwater flow, forming a cone of depression, the metal deposition is carried out in a career in geochemical barrier in place overall yield of groundwater.
2. The method according to claim 1, characterized in that the explosive fragmentation in the area of ore concentration exercise for the whole pit in the period when the plane surface of the depression cone is above the ore zone, and the flow of reagents produced during the lowering of the bottom of the quarry, when the plane surface of the depression cone passes through the field of ore concentration, while geochemical barrier plating periodically move along with the water intake as reduction of mining operations.
3. The method according to claim 1 or 2, characterized in that the supply of reagents is carried out from the surface through the sump in places of least depth of groundwater depression cone.
FIELD: mining industry, possible use mainly during extraction of argillaceous placers by open method.
SUBSTANCE: method includes mechanical shrinkage of mass and extraction of sands using digging-transporting equipment. Shrinkage of mass is performed with creation of crowns, and extraction of sands is performed by cutting off aforementioned crowns.
EFFECT: increased recovery of useful components from argillaceous sands of mass, containing large pieces.
4 cl, 8 dwg
FIELD: mining, particularly opencast mining of mineral deposits in the case of limited vertical ore bodies, for instance kimberlite pipes.
SUBSTANCE: method involves forming pit sides having inclinations less than minimal possible ones to provide pit side stability; preparing rock for further excavation by drilling-and-blasting operations; transporting ore and overburden via main incline by wheeled vehicle; forming transfer point plate at the second stage; excavating up to design depth along with forming pit sides having maximal possible inclinations, which provide pit side stability; cutting main incline from transfer point plate, wherein inclination thereof is increased in longitudinal direction; cutting ore pillars of the first stage; forming pit side having high ledges; forming lower ledge along ore body outline; forming temporary incline in one pit part; transporting ore and overburden to transfer point plate by means of caterpillar vehicle; forming temporary incline to provide pit cutting to design depth and cutting ore pillars under temporary incline.
EFFECT: increased efficiency of deposit excavation due to reduced overburden volume within the bounds of deep limited pits.
3 cl, 1 ex, 1 tbl, 4 dwg
FIELD: mining, particularly opencast mineral mining.
SUBSTANCE: method involves stepping rock up to design outline with leading in the first stage pit edge; transporting ore along main decline to plant and stacking overburden in dump; excavating connection entry between the first stage pit and the second stage pit so that the entry is opened in previously excavated the first stage pit; cutting the second stage pit; transporting ore and overburden from the second order pit via connection entry; depositing overburden from the second order pit in the first stage pit goaf after termination of the first stage pit excavation. Before ore and overburden transportation from second order pit via connection entry overburden excavated from the second order pit is accumulated in outer dump. Overburden from the second order pit is conveyed to day surface along temporary decline system. When the second pit side reaches designed outermost outline temporary declines are killed.
EFFECT: reduced costs of deposit development and decreased hazardous action of mining operations on environment.
4 cl, 4 dwg, 2 tbl, 2 ex
FIELD: mining industry, possible use during extraction of coal, ore and non-ore deposits by open method.
SUBSTANCE: in accordance to method, geological structure of massif is analyzed, position of potential sliding surface is detected, physical and mechanical properties of rocks are determined. Along profile parallel to edge of shelf in its middle portion, frequency of alternation of impulses of natural electromagnetic radiation is measured. On intervals where this frequency exceeds level of background radiation more than 2 times, interval-wise measurement of relation of strength level of signal electric field at two working frequencies is performed. By means of computed logarithmic dependence, depth of location of potential sliding surface is determined. With consideration of change of this depth, structure of massif, technological parameters and physical-mechanical properties of rocks, values of stability reserve coefficients are calculated on basis of ratio of momentums of holding and moving forces within limits of detected dangerous portion. Probability of landslide development is evaluated on basis of minimal values of stability reserve coefficients.
EFFECT: increased precision when predicting stability of quarry sides.
2 cl, 1 ex, 1 tbl, 4 dwg
FIELD: mining industry, possible use in deep quarries extracted with utilization of motor and conveyor transport.
SUBSTANCE: method includes transportation of rock mass from excavation faces by dump trucks and loading it through mobile crusher plant, mounted at temporarily shut down section of quarry, and transit ribbon conveyor, located in the mine on end side of quarry, onto ribbon conveyor lift, positioned in mines on end side of quarry. After update of quarry with positioning of mobile crusher plant at temporarily shut down section of quarry side, transit conveyor is disassembled, crusher block from mobile crusher plant is moved and mounted above end section of conveyor lift, in semi-trench driven preliminarily to subjacent safety bench a bunker is assembled with plate feeder for loading crusher block, while block of rocks formed below previous locations of mobile crusher plant and dump truck unload points is extracted with transportation and loading of exploded rock mass from dump trucks and rotary platform of main ramp through bunker with feeder and through crusher block from mobile crusher plant.
EFFECT: no need for moving crusher plant and for additional motor transport unit between crusher plant and conveyor lift.
FIELD: mining industry, applicable in opencast mining of hard rocks.
SUBSTANCE: the method consists in multirow drilling of the block to be blasted by holes of a permanent diameter, charging of the holes by explosive, connection of the explosive charges by a blasting network and short-delay blasting of them. The quantity of the energy of the charges in the lower part of odd rows is increased, for example, by drilling of parallel drawn together holes, whose charges are not similar is height, or by expansion of the holes in this part. The net of arrangement of charges of the even and odd rows is also increased. The order of blasting is provided by laying of the blasting network, each charge of the even order is blasted after weakening the mass broken by it by blasting of the increased charges of the previous odd row. In this case the quantity of the energy of an elementary charge of holes of each row approaches the quantity of the energy required for blasting destruction of the mass broken by them, thus providing the preset degree of crushing and enhancing of the blast efficiency.
EFFECT: enhanced yield of rock mass from one running meter of the hole, reduced consumption of explosive for breaking due to rational placement of the explosive in the mass.
4 dwg, 1 tbl
FIELD: mining industry, particularly open cast mining.
SUBSTANCE: method involves loading tanks at lower horizon during tank unloading at upper horizon and lowering empty tanks from upper horizon during loaded tank lifting from lower horizon; providing additional sites for tank loading at lower horizon and corresponding additional sites for tank unloading at upper horizon; laying cable in zigzag manner so that the cable passes along loading and unloading sites and creates pulling branches; connecting tank with aerostat to each pulling branch. Tanks located at upper and lower horizons are fastened to next nearest branch so that distances between loading and unloading sited along the branches are equal one to another. Device for above method realization is also disclosed.
EFFECT: increased capacity.
2 cl, 2 dwg
FIELD: earth-moving equipment, particularly machines for ground cutting, pit excavation for hydraulic structure, large-scale object building, as well as for mineral deposit development.
SUBSTANCE: ditching and transportation rig comprises basic chassis connected with earth-moving module and with transportation-handling devices, which move ground in vertical and horizontal directions. Earth-moving module is made as bucket rotary drum secured by means of vertical and horizontal hinges, as well as control-rods to the basic chassis so that the bucket rotary drum may rotate in vertical and horizontal planes and overhanging length thereof may be changed. Device is provided with continuous-type conveyer unit made as auger system and as telescopic pipe pivotally connected with transportation-handling device, which move ground in horizontal direction. Horizontal auger is located inside bucket rotary drum and is offset with respect to drum axis so that auger axis is parallel to drum axis. The horizontal auger is transversal to inclined auger having lower end installed under outlet end of horizontal auger. Upper end of inclined auger is pivotally fastened to upper telescopic pipe section. Transportation-handling device, which moves ground in horizontal direction, is made as endless band installed on length-adjustable telescopic sliding frame, which may change ground displacement distance by means of tightening rollers. Rollers have pins installed at different heights sliding in telescopic frame grooves. The telescopic frame has flanging. Lower telescopic pipe section is provided with rotary hinge connected to telescopic frame flanging so that rotary hinge may perform longitudinal movement with respect to frame flanging. Transportation-handling device, which provides vertical ground movement is composite and made as continuous-type bucket bands mating each other in transfer points.
EFFECT: increased ability and speed of pit excavation, reduced costs of ground excavation and transportation outside the pit and provision of continuous technological cycle.
2 cl, 8 dwg
FIELD: mining, particularly methods of surface mining.
SUBSTANCE: method involves transporting rock and unloading thereof under dump front slope; forming advance embankments; increasing advance embankment heights and pouring rock between the embankments. The advance embankments are formed of solid rock and are made as broken line with line sections extending at an acute angle to direction of dump front forming. Gaps between advance embankments are filled with soft rock so that soft rock front is behind from dump front and spaced from it for distance equal to not less than distance between solid and soft rock locations.
EFFECT: increased stability of each stacked refuse layer.
3 cl, 1 dwg
FIELD: mining, particularly to develop steep and inclined ore bodies.
SUBSTANCE: method involves separating stages and dividing open-pit field into penetration and production horizons; excavating ore and removing capping by bench movement; employing temporarily inactive wall parts; constructing descents and haulage benches, conveying semi-trenches; delivering ore and cut capping to day surface; dividing capping rock in transversal section in hanging and laying wall into inclined layers, wherein angle of temporary inactive wall slope parts of layers to be excavated is different in upper, central and lower zones and the angle is increased in dependence of different speed of horizontal and vertical bench movement in upper and lower horizons; forming temporary (intermediate) dumps, permanent and additional in deposit sides; conveying rock along the descents directed towards the second and the third excavation stage pit contour with the use of cyclic vehicle means and then with the use of continuously acting vehicles, wherein trenches with conveyers are directed so that conveyor lifting means may be extended or cascade system may be created if ore body thickness varies or ore body inclination angle changes. Conveyer lifting means are formed in ore production zone when cyclic acting means reach extreme transportation level, which puts the system out of optimal operation area. Conveyer lifting means path is selected to elongate the conveyer lifting means or to provide their operation along with vertical lifting means to deliver ore to transfer point on day surface. The last lifting means is constructed at high depth so that composite transport level does not project outwards optimal system operation area. At final pit development stage design wall angles are adjusted, the last layers are cut and the wall angle magnitudes are brought to extreme stability-varied final magnitudes.
EFFECT: increased efficiency of capping and ore extraction, reduced current stripping ratio, decreased stripping volume in sides during sloping thereof under steep angles and increased operational safety.
6 dwg, 1 ex
FIELD: mining industry, namely, geological and technological methods for enriching mineral resources.
SUBSTANCE: production line includes, mounted serially one after another: ore stack, draining system, reinforced concrete trough, trough board, free-flow pipeline, buffer vessel, receiving vessel, pump, force pipeline, irrigation system, device for precipitation of precious metals and device for additional strengthening of solutions. Production line is equipped with device for heating solution, mounted in front of irrigation system, free-flow pipeline, additional buffer vessel, additional receiving vessel, pump, force pipeline, emergency vessel, mounted successively one after another. Device for precipitation of precious metals and complex of devices for collecting and processing saturated solutions are positioned below boundary of seasonal freezing of soils. For operation in winter period, irrigation system is deepened into surface-adjacent layer of ore stack.
EFFECT: increased efficiency of industry operation due to year-round heap leaching of mineral resources under harsh climate conditions with little snow in winters and low negative temperatures.
2 cl, 2 dwg
FIELD: technology for extracting mineral resources by means of underground lixiviation with usage of gaseous oxidizers.
SUBSTANCE: method includes feeding lixiviation solution and gaseous reagent from the surface through wells into productive level, dispersing reagent and mechanical suspensions in lixiviation suspension in acoustic field with intensiveness 1÷70×104 Wt/m2, lixiviation itself and recovery of productive solution. Dispersion and feeding into productive level of lixiviation solution is realized at hydrostatic pressure Pcalc., determined from formula: Pcalc.=Qg/Qa×Pa, where Qg - required concentration of gaseous reagent in lixiviation solution, kg/m3; Qa - amount of gaseous reagent being diluted in lixiviation solution at atmospheric pressure, kg/m3; Pa - atmospheric pressure.
EFFECT: increased lixiviation efficiency due to increased concentration of gaseous reagent in lixiviation solution while preventing effect of gas mudding of productive level and increasing quality of dispersion of mechanical suspensions to prevent mechanical mudding of filter-adjacent area of force wells.
3 cl, 1 dwg
FIELD: mining industry, possible use for underground lixiviation of hard and resilient ores of mineral resource deposit.
SUBSTANCE: method for underground lixiviation of hard and resilient ores includes driving preparatory and dividing mines, well mass extraction of chamber, ejection of extracted ore onto hauling level, shattering thereof into required condition on mobile shattering complex with following return of it back or into lower lixiviated chamber, watering of prepared ore with solution of reagent, partial outlet of lixiviated ore with return into chamber.
EFFECT: increased speed of lixiviation of and increased recovery of useful component, and also possible simultaneous extraction of two and more chambers and substantially decreased cost of lixiviation.
FIELD: mining industry, possible use for extracting nickel.
SUBSTANCE: method includes creation of force and product mines, forcing lixiviating acid solutions into force mines with oxidizing and following extraction of ore bed, output of productive solution through product mines, refining of solution. Treatment with sulfurous solutions with their delay in formation is performed at pH≤1,5, and productive solutions are drained at pH≤1,0.
EFFECT: simplified technology, decreased flow of reagents, increased recovery of main metal.
FIELD: technology for extracting product from well.
SUBSTANCE: in accordance to method, product and auxiliary wells are drilled. Wells are outfitted with filtration columns, extracting and forcing equipment with blocking means. In accordance to invention extracting equipment is provided with blocking means. Upper extracted bed is isolated from lower productive bed. With extraction of productive bed, extracting and forcing equipment is lowered respectively into product and auxiliary wells.
EFFECT: increased formation extraction efficiency.
FIELD: underground liquid and gas reservoir building in soluble impermeable rock containing alternating soluble and insoluble seams.
SUBSTANCE: method involves exposing seam roof and bottom along with creating workings by supplying solvent along one coaxial string and removing brine via another string; applying pressure of overlaying liquid column to exposed seam with the use of isolation partition in annular seam space; creating pressure drop enough for insoluble rock seam breaking in well by injecting liquid in well; forming waterless protective layer under seam bottom after seam roof and bottom exposing by supplying unloading material under seam bottom, wherein the unloading material has density lesser than water density. Waterless protective layer thickness exceeds 0.2 of insoluble rock seam thickness. Isolation partition is made as elastic shell containing filler.
EFFECT: increased efficiency of insoluble rock seam treatment.
7 cl, 1 dwg
FIELD: dissolving minerals other than hydrocarbons, for instance by an alkaline or acid leaching agent and physical and chemical permafrost rock erosion investigation.
SUBSTANCE: device comprises ground tray, supply vessel, supply chamber, cooling chamber adapted to receive round tray. The ground tray is formed as transformer consisted of extensible telescopic pipes connected with each other in tray joints by hinges. The telescopic pipes may rotate through 360° about hinge axes. The ground tray is installed on platform fastened to frame by means of hinge located from one side and by means of lifting jack arranged from another side thereof. The device also comprises thermocouple array, thermistor array and measuring capillary pipes. Metal contour with heat emitter is installed inside cooling chamber over ground tray. The heat emitter is arranged on electric motor provided with driving gear. Supply vessel is made as thermostat. Supply chamber is made as hydrometric pipe for metered solution distribution into ore spraying system.
EFFECT: possibility to investigate technological leaching parameters in ground tray having different shape and lithologic structure with taking into consideration tray inclination and orientation change, which varies heat transmitted from outer sources, namely sun and solution, and from inner sources, which generate heat due to physical and chemical metal leaching reactions.
2 cl, 3 dwg
FIELD: mining, particularly to extract minerals from technogenic formations (wastes, dumps) stored on unprepared natural or imperfect artificial base by geotechnology methods.
SUBSTANCE: method involves forming exhaust wells in water-bearing horizon under technogenic formation base; constructing developing net of observation wells in water-bearing horizon to monitor underground water; accumulating under-dump water; extracting minerals from under-dump water to obtain mother solutions; pumping out contaminated underground water to ground surface through exhaust wells in volume, which provides creation of hydrodynamic swirl to prevent contaminated water spread beyond technogenic formation contour and partly evaporating contaminated water on ground surface; forming leaching solutions on the base of mother solutions and residual fraction obtained by contaminated underground water evaporation by additional strengthening thereof with leaching reagents; performing technogenic formation leaching by spraying obtained leaching solutions over the technogenic formation; bringing water-bearing horizon to natural condition thereof by pumping underground water from cater-bearing horizon and treating the underground water and under-dump water to obtain ecologically safe water.
EFFECT: improved ecology in storage location, increased efficiency of technogenic formation and under-dump solution utilization.
3 cl, 2 dwg, 1 ex
FIELD: environmental geology, particularly dissolving minerals other than hydrocarbons, for instance by an alkaline or acid leaching agent for ore material storage and dressing.
SUBSTANCE: method involves forming antifiltering and drainage layers on surface of dump to be formed and providing inclination for solution flowing down; arranging substandard heavy metal sulfide containing ore material layer to be leached, resolution enhancing mineral, namely pyrrhotine, and chemically active nonmetallic mineral on drainage layer, wherein the substandard heavy metal sulfide containing ore material is remainder material obtained during copper-nickel ore dressing, concentrated pyrrhotine, substandard copper-nickel ores and substandard mineralized phyllites. Sulfide containing ore material comprises serpentines and carbonates as chemically active nonmetallic minerals. Before ore material leaching the ore material is subjected to deslurring along with separation of fine fraction having particle dimensions of 0.025 mm or less. The layers are inclined at 2°-6° angles to horizon line. Layer to be dressed is formed of substandard sulfide ore material containing precipitation mineral, namely serpentine, in amount of not less than 60%. The ore material is preliminarily roasted at 620°-680°C temperature. Layer to be dressed is arranged outside the layer to be leached and drainage layer in flow direction and communicated with drainage layer through side surface of drainage layer. Layer to be dressed may be arranged in longitudinal section row installed along the strike of above layer. After dump forming layer to be leached treatment is performed by periodic natural or forced watering thereof to solve heavy metals so that solution is created. The solution passes through specially formed drainage channels to layer to be dressed.
EFFECT: increased efficiency of substandard ore material treatment due to increased simplicity and decreased costs.
6 cl, 2 ex, 4 dwg
FIELD: mining industry, particularly for dissolving minerals other than hydrocarbons by an alkaline or acid leaching agent.
SUBSTANCE: method involves drilling injection wells and extraction well or extraction wells in deposit block to be developed; injecting working reagent solutions via the wells and extracting the production solutions; performing fracturing of productive horizon rock by blasting thereof in lower well parts to increase production horizon permeability; forming crushed and cracked zones in bottom rock in lower extraction well part for production solution accumulation, wherein the crashed and cracked zones are formed by rock blasting; injecting hot working reagent solution into the productive horizon. The working reagent solution includes additives, namely easy solving alkali or other metal salts having low eutectic temperature and not reacting with the working reagents and with possible intermediate products of reaction. The additives are mixed in amounts providing concentration near saturation.
EFFECT: possibility to create thawed working zone for following metal heap leaching in any season.
FIELD: mining industry.
SUBSTANCE: method includes prior pumping into bed through system of feed wells of solution, containing sodium hypochlorite or chloride, draining product solutions through draining wells system. Fed solution additionally has hydrogen chloride with following ratio of components, g/l: sodium hypochlorite 0.4-1.0, sodium chloride 3.0-4.0, hydrogen chloride 0.3-1.0. sodium hypochlorite solution is received directly at place of use via electrolysis of sodium chloride solution. For receiving sodium hypochlorite solution rotation compounds are used, received after productive solutions cycle through absorption columns.
EFFECT: higher safety.