Method for underground block leaching of useful minerals

FIELD: mining.

SUBSTANCE: invention refers to mining, and namely to production of useful minerals by an underground block leaching method. The underground block leaching method of useful minerals involves driving at the block bottom of openings of drain horizon for collection of productive solutions, crushing and shrinkage of ore so that a drain horizon of a safety pillar is left above openings, drilling of upward pumping wells from openings of drain horizon through the safety pillar, supply through them of a leaching solution to shrunken ore, collection of productive solutions in openings of drain horizon. Upward pumping wells from openings of drain horizon through the safety pillar are drilled to lower boundary of shrunken ore, and the leaching solution mixed with air is supplied to shrunken ore via upward pumping wells in a hydrodynamic cavitation mode.

EFFECT: invention allows increasing extraction degree of useful minerals from ores, shortening leaching duration and reducing flow of leaching reagents.

3 cl, 2 dwg

 

The invention relates to mining, namely, the mining method underground block leaching.

A known method of underground block leaching of metals from ores, including sinking in the lower and upper parts of the operating unit workings, and on the flanks rising, drill blasthole ring, blasting and magazynowania ore, irrigation tamakaimoana ore leach solution from the workings of the upper horizon, the capture and collection of productive solutions (see Lunev and other Underground leaching of uranium ores. Atomizdat, 1974, p.37-41).

The disadvantage of this method is significant loss of mineral in intermediate pillars in the case of multi-storey scheme of development of the reserves.

In the practice of the described method, in which the leaching solution filled the cell with a broken ore, to what level precast horizon unit fully gidroizolirovat, forming the jumper, which has equipped (locking system) - a pipe with a valve, for pumping productive solution (see Krotkov CENTURIES and other Mining and chemical technology of uranium mining. M. GEOS, 2001)

This method also has a very significant disadvantage, namely, that the flooding of the solvent chamber from the leached ore is removed the oxygen that t is aetsa oxidant, stimulating the rate of dissolution. For this reason, considerably slows down the process of extracting metal and increases the consumption of the reactants.

Closest to the claimed combination of essential characteristics of the claimed method is a method block underground leaching in high rise development of mineral deposits, with which to supply pls Buryats ascending irrigation wells in the upper part tamakaimoana in the block of ore through netstrategy pillar, left over workings of precast horizon (see ed. St. USSR №705819)

The disadvantage of this method are significant losses of minerals in crowded areas of broken ore due to insufficient contact of the leach solution with tamakaimoana ore in crowded areas, as well as the lack of reliable technologies drilling, casing and maintenance of drainage wells. That is due to the need to submit leaching solution in tamakaimoana ore from the top by sprinkling in a pulsating mode.

The objective of the invention is to provide a method of underground block leaching of minerals, providing a significant increase in the degree of extraction of minerals from ores, reduction of the duration in which meliciani, reduction of leaching agents.

The problem is solved by creating a method of underground block leaching of minerals, including tunnelling in stope workings drainage horizon for collecting productive solutions, breaking and magazynowania ore separation over the workings of the drainage horizon safety pillars, drilling itself injection wells of the workings of the drainage horizon through the safety pillar, the flow through itself injection wells leach solution in tamakaimoana ore, collecting productive solutions in the workings of the drainage horizon, a difference which, according to the invention, is that rising injection wells of the workings of the drainage horizon are drilling through the safety pillar to the bottom (sole) of zamagnichennoi ore and leaching the solution serves in tamakaimoana ore mixed with air in the regime of hydrodynamic cavitation.

Preferably, the mixture leach solution with air to add surface-active substances in the form of liquid additives, providing stable foaming and simultaneously reducing the surface tension of the leach solutions, thus increasing the concentration of metal in the pregnant solution and reduces the duration of the period above is Oceania.

It is advisable, additionally present the leaching solution in tamakaimoana ore from the top by sprinkling in a pulsating mode.

When carrying out the inventive method is achieved technical result, namely to ensure maximum contact of the leach solution with samogazirovannoe ore, i.e. full saturation of the total volume tamakaimoana ore leaching solution supply to the surface of the dissolution of oxygen, accelerating the dissolution rate, sustainable rate of percolation of the solution with a smaller value of the ratio of liquid-soluble ore (W:T).

Thanks to the achievement of the technical result and the presence of water-air mixture of hydrocarbon radicals as contained in the surface-active substance is excluded, the process of re-resedimentation of metal ions in the process of movement of the solvent to drain production, increases the concentration of metal in the pregnant solution, reducing the amount of solvent.

Creates a water-air mixture, which fills mezhkuskovomu space containing all the necessary components for the dissolution of mineral components, which formed as a result of loosening of the leached ore. Rational ratio of the oxygen in the air is thinner and the speed of priscian the I of this mixture in mikusova space is provided by a whirlwind-cavitation device, and a supply of foaming agent, for example, the appropriate surface-active agent.

This eliminates the disadvantage noted in the similar concerning uneven saturation of the compacted plots leached solution due to infiltration mode of submission. Completely eliminated the disadvantage described in the second analogue, which decreases the rate of extraction of the metal in the pregnant solution. Finally, is eliminated and the third disadvantage, as it eliminates the need for drilling and process control leaching set out in the prototype.

This technical result increases the efficiency of extraction of minerals claimed process as a result of increasing the degree of extraction of minerals from ore, with reduced leaching and reduced consumption of leaching agents. Moreover, the issue of productive solutions can be carried out with the lower (drain) of the horizon, and to be pumped through the upper working horizon.

Figure 1 shows a vertical section of the block leaching prepared for leaching figure 2 - injection wells and location them in a whirlwind-cavitation device.

The method is implemented as follows.

Deposit or ore Deposit is mined from top to bottom floors, opened after the I-storey drifts 1. Then is the separation of the operational blocks of underground leaching flank rising 2. On the lower horizon at block underground leaching are drainage generation 3. Above it on the ore body are sublevel generation (not shown) at a certain distance from one another, which produce a rotating drum and magazynowania leached ore. Between 3 workings drainage horizon and the lower sublevel development (drawing no) leave the safety pillar 4 thickness of about 5 m, through which the Buryat drainage wells 5 and rising injection wells 6 to tamakaimoana leached ore 7. In the workings 3 drainage horizon with concrete lintels formed on the limits of the block form rastvorobetonny 8 productive solutions. In the lower part of the concrete waterproofing jumper supplied pipe with a shut-off system (not shown) for periodic release of productive solutions from the block.

Filing leach solution in tamakaimoana leached ore 7 produce upwards on rising injection wells 6, which establish the vortex-cavitation device 9 and a flexible discharge hose 10. The space between the vortex-cavitation device 9 and the wall itself injection is quaini 6 are filled with concrete. Whirlwind-cavitation device 9 is connected through a flexible discharge hose 10 to the distribution tanks outside the block.

Prepared leaching solution in a mixture with air and liquid additive surfactants from the processing plant solutions (not shown) is supplied into the pumping chamber (not shown)and from there to the distribution tank located under each block of underground leaching. Of each such distribution capacity can be powered by one or more vortex-cavitation device 9, through which a flexible discharge hose 10, tightly cemented into itself injection wells 6, all the way to the top in cavitation mode fill (podtaplivat) tamakaimoana ore 7 a mixture of leach solution with air and surface-active substance in the form of liquid additives. As a result of flooding tamakaimoana ore 7 a mixture of leach solution with air and foaming surface-active agent ensures complete filling of open cracks and the entire free space between the pieces tamakaimoana ore 7 preset speed and the ratio of liquid and air. Injection together with the leaching solution of surface-active washes the VA, with the ability to solubilize, lowering the surface tension leach solution, foaming and prevent resultant deposition rates of metal, provides the intensification of the process of leaching. Moreover, the volume of air and foam in the injected mixture is set experimentally, to our knowledge, this amount should not be less than 50% of the volume of voids tamakaimoana ore.

The proposed method does not exclude additional supply of leach solution from the top down by sprinkling on the pulsation pattern.

If during the "flooding" the solution did not gain the necessary concentration, he can stand inside tamakaimoana ore 7 to set the desired concentration, then at the next stage, you should increase the speed of flooding at a lower solvent consumption or to increase the concentration of the reagent in the leaching solution.

After completion of the leaching process and dismantling whirlwind-cavitation device 9 drainage wells 5 are used as explosive for repayment naastrehviga protective pillar 4.

The proposed method block underground leaching allows to increase the degree of extraction of minerals from ore, to reduce the leaching time in 5-6 times and duration of irrigation to 3-4 who nazev, the speed of lowering of mining operations increased by 2-3 times, will increase several times the productivity in underground work and the safety of pretreatment.

1. The way underground block leaching of minerals, including tunnelling in stope workings drainage horizon for collecting productive solutions, breaking and magazynowania ore separation over the workings of the drainage horizon safety pillars, drilling itself injection wells of the workings of the drainage horizon through the safety pillar, the flow through itself injection wells leach solution in tamakaimoana ore, collecting productive solutions in the workings of the drainage horizon, characterized in that the rising injection wells of the workings of the drainage horizon through the safety pillar of the Buryats to the bottom zamagnichennoi ore and leaching solution in tamakaimoana ore served by itself injection wells in mixtures with air in hydrodynamic cavitation.

2. The method according to p. 1, characterized in that the mixture of leach solution with air to add surface-active substances in the form of liquid additives.

3. The method according to p. 1, characterized in that it further leaching solution in tamakaimoana ore served on top of the ay sprinkling in a pulsating mode.



 

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1 ex

FIELD: mining.

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FIELD: mining.

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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

FIELD: metallurgy.

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EFFECT: increasing the efficiency of the process cycle at reduction of costs and emission of hazardous gases.

5 cl, 9 tbl, 6 ex

FIELD: mining.

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.

FIELD: mining.

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.

4 cl

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.

3 cl

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