Method for softening and disintegration of shallow deposit clay sands

FIELD: mining.

SUBSTANCE: invention relates to mining and may be used for development of natural and technogenic high-clayey gravel deposits of minerals with an increased content of fine-grained and disperse-grained gold. The method for softening and disintegration of shallow deposit clay sands involves deposit opening, digging a water supply trench slanted towards the deposit stratum drop and a water collection trench of a depth with a difference of bottom marks in the trenches from 1.5 to 3 m, filling the water supply trench with water with simultaneous water-filling of the deposit area under development to a depth sufficient for mounting and installation of equipment in a floating state and subsequent maintenance of the level for primary softening of clay sands by way of supply of water through an adjustable shutter, mounting the delivery hydrotransportation installation, process of natural filtration of water into the bulk. One mounts an ultrasonic installation and a mechanical installation. Successively one intensifies filtration of water into the compacted sand strata by way of ultrasonic impact on the sands along the surface of the site being developed by means of radiation in the interval of low ultrasonic frequencies ensuring maximum amplitude of displacement of compacted sand particles and radiation intensity parameters creating stress-strain tension, resistance to rupture and shear exceeding the normative data for deposit frozen sands strength. One performs intensification of disintegration of water-saturated sand surfaces with ultrasound at the same radiation frequency but reduced parametres of ultrasonic radiation intensity corresponding to the averaged equilibrium density and compressibility of water saturated sands. Then one performs hydrodynamic activation by way of mixing the hydromixture with an element of the mechanical installation and supply of the hydromixture with the help of the delivery hydrotransportation installation to the concentrating installation.

EFFECT: improved efficiency of destruction and disintegration of deposit clay sands.

2 dwg, 2 tbl

 

The invention relates to the mining industry and can be used in the development of natural and man-made high-clayey alluvial deposits of minerals with a high content of fine gold.

There is a method of destruction of a rock, according to which the array of exposed rock cutting tool and the ultrasonic vibrations at the site of contact of the latter with an array, you determine the direction of maximum compressive stress in the array, and the direction of ultrasonic vibrations are oriented perpendicular to the direction of maximum compressive stresses ahead about the impact of rock cutting tools [1].

The method is intended for destruction of rocks ore type and cannot be used for crushing of medium to high plasticity clayey sand placers.

Known way to control the transformation process gold-bearing rocks, including the loss of strength of the rock mechanical impact with subsequent periodic initiation of elastic waves in the ultrasonic range with a constant frequency in the sand and clay rock-water, the initiation of elastic waves is carried out at a constant external pressure, different time intervals and capacities, and when the pre is sustained fashion the choice of the controlled range of particle sizes determine the optimal exposure time, that provides the stability of sediment clay particles in the system with constant volume, then calculate the conditional coefficients of transformation, build schedule changes in these coefficients of transformation from the time from which define the controlled increase of the initial value of the specific surface razuprochneniya particles on the order in which lower power ultrasonic radiation twice [2].

This method does not include the intensification bulk stations sealed and water-saturated Sands and can be used for activation of the slurry and its control.

The closest in technical essence is a way of softening and disintegration of clay sand gravel deposits, including the opening of deposits, sinking vodozabornoy trench with a slope in the direction of drop formation deposits and drainage trench depth with the height difference of the bottom of the trench from 1.5 to 3 m, water filling vodozabornoy trench with simultaneous filling of the developed area placers water to a depth that provides the mounting and installation of equipment in a floating state, and maintain this level in subsequent to initial softening clay Sands with water supply through an adjustable shutter, the natural process of water filtration in the array, the installation setting the pressure of hydrotestosterone. At the end of the pressure unproved set videobrothel and hydrodynamic cavitator [3].

The disadvantage of this method is that the process of disintegration is carried out by exposing the slurry. However, in the first stage, natural water filtration in the array process is not initiated and therefore develops rather slowly, as the permeability of clay is the value from the fourth to the sixth order of smallness - 0,0005-0,000005 cm/S.

The technical result of the proposed method is to increase the efficiency of destruction and disintegration clayey sand placers by the intensification of the natural filtration process of water in compacted and saturated layers and disintegration slurry with clay particles.

The technical result is achieved due to the fact that in the method of softening and disintegration of clayey Sands shallow placers, including the opening of deposits, sinking vodozabornoy trench with a slope in the direction of drop formation deposits and drainage trench depth with the height difference of the bottom of the trench from 1.5 to 3 m, water filling vodozabornoy trench with simultaneous filling of the developed area placers water to a depth that provides the mounting and installation of equipment in a floating state, and maintaining it at the anti-shudder performance subsequent to initial softening clay Sands with water supply through an adjustable shutter installation of pressure hydrotestosterone, the natural process of water filtration in the array, make installation of ultrasonic installation and mechanical installation, consistently intensify the filtration of water in compacted layers of sand by means of ultrasonic treatment on the Sands on the surface of the developed area radiation in the range of low ultrasonic frequency for maximum amplitude of the displacement of particles compacted Sands and parameters of the radiation intensity, which creates compressive stress-strain, tear resistance and shear in excess of regulatory data strength of frozen sand placers, are intensifying the disintegration of the water-saturated surfaces Sands ultrasound with the same frequency radiation, but lower settings of the intensity of ultrasonic radiation corresponding to the average equilibrium density and compressibility of water-saturated Sands, and then produce hydrodynamic activation by stirring the slurry element of the mechanical installation and the flow of slurry through the installation of pressure hydrotestosterone to the beneficiation plant.

The combination of significant new features allows you to solve a new technical problem is to intensify the process of production through the intensification of natural the process of filtering water in a sealed and water-saturated layers of clayey sand and disintegration slurry with clay particles.

Figure 1 - General view of the system development placers, ensure the implementation of the method; figure 2 is obtained by calculation of the graphical dependence of the amplitude of the displacement |u| particles in the sound wave of the frequency f of the ultrasonic radiation with the deformation of sand |S|=10-5m, curves 1, 2, 3 obtained for subplotting, stiff and flexible sand placer deposits in the Amur region, respectively. The graph gives a visual representation, showing a preference for lower frequency 25 kHz radiation when exposed to the Sands with varying degrees of plasticity, in which the amplitude is the maximum displacement of particles.

The implementation of the method is as follows. Make the opening placers, sinking vodozabornoy trench 1 with a slope of 2 in the direction of 3 falls reservoir deposits and drainage trenches 4 depth with the height difference of the bottom 5 in trenches 1 and 4 from 1.5 to 3 meters Filled with water vodozabornoy trench 1 with simultaneous filling of the developed area 6 placers water to a depth of 7, providing installation and hardware installation 8 in a floating state. Maintaining a level subsequent to the initial softening clay Sands with water is carried out using an adjustable shutter 9. Perform installation install pressure hydrotestosterone 10. After receiving a bit of water on natively section 6 is the natural process of water filtration in the array. Make installation of ultrasonic 11 installation and mechanical installation 12. Consistently intensify the filtration of water in compacted layers of sand by means of ultrasonic treatment on the Sands on the surface of the developing section 6 of the radiation in the interval of low ultrasonic frequency for maximum amplitude of the displacement of particles compacted Sands, figure 2. Asking the deflection |S| by the formula

,

,

,

where u is the particle displacement in the sound wave (the absolute value of the displacement vector particles), m; Λ is the wavelength, m; Vp- the speed of longitudinal waves in an isotropic solid space, m/s; λ and µ are the elastic constants, constants Lama, calculated parameters of the radiation intensity, which creates compressive stress-strain, tear resistance and shear in excess of regulatory data strength of frozen sand placers, PL. 1. The initial parameters of the sound intensity during deformation |S|=10-4m create compressive stress-strain, tear resistance and shear in excess of regulatory data strength of frozen sand placers (instruction on the development mnogomernyh placers underground EP 06-326-99, appr. The resolution of Gosgortekhnadzor of Russia from 18.11.99, No. 84, entered 01.06.200 year).

Table 1
Design parameters of ultrasonic treatment on compacted plots of sand placers frequency = 25 kHz
Intervals wave resistance of Sands (ρ·Vp)·106kg/m2·The lamé constants (λ+2µ)·109The amplitude of the oscillatory velocity deformationm/s |S|=10-5mThe initial intervals sound intensity Iy·10-2when deformation |S|=10-5m, W/cm2The initial intervals sound intensity Iywhen deformation |S|=
10-4m, W/cm2
The initial intervals sound intensity Iy·102when deformation |S|=
10-3m, W/cm2
3,98-4,18of 7.96-at 8.362of 7.96-at 8.36coefficient was 0.796-0,836of 7.96-at 8.36
of 5.2 to 6.013,06-15,062,516,3-18,821,63-1,882 16,3-18,82
7,2-7,321,69-22,05332,53-33,13,253-3,3132,53-33,1

Perform the intensification of ultrasonic disintegration installation 11 water-saturated surfaces Sands ultrasound with the same frequency radiation, for example 25 kHz, but lower settings of the intensity of ultrasonic radiation corresponding to the average equilibrium density and compressibility of water-saturated layers of sand, PL. 2.

tr>
Table 2
Design parameters sound emission to water-saturated auriferous Sands placers taking into account the average equilibrium density and compressibility of the environment
The initial calculated values of the intervals
The estimated sound speed at equilibrium is equivalent to the density value Ve·10 m/sthe amplitude of the displacement of particles in a sound wave |u|·10-7mthe amplitude of the oscillatory velocity of particlesm/s
when the strain
|S|=10-5m
constant Lama (λ+2µ)·109kg/s2·msound intensity Ie·10-2when deformation |S|=
10-5m, W/cm2
sound intensity Iewhen deformation |S|=10-4m, W/cm2
The porosity of 26%, the depth of the layer of 0.01 m, the average water content of 15%andin=0,15, am=0,85
1,771-1,7581,127-1,1191,769-1,7575,78-5,955,11-5,230,511-0,523
1,968-1,9081,253-1,2151,967-1,9077,46-8,007,34-7,630,734-0,763
2,082-USD 2.0751,326-1,3222,082-USD 2.075at 9.53-being 9.619,92-becomes 9.970,992-0,997
The porosity of 26%, the layer depth of 0.04 m, the average water content of 1.5%andin=0,015, am=0,985
1,966-1,9641,252-1,2521,966-1,966 7,63-8,007,50-7,860,750-of 0.786
KZT 2,382-2,3621,517-1,505KZT 2,382-2,36311,77-13,3314,02-of 15.75to 1.402-1,575
2.837-2,8421,807-1,812,837-2,84219,23-19,6127,28-27,862,728-2,786
The porosity of 33%, the depth of the layer of 0.01 m, the average water content of 25%andin=0,25, am=0,75
1,677-1.6591,068-1,0571,677-1,6594,899-5,004,11-4,150,411-0,4)5
1,799-1,7431,146-1,111,799-1,7435,88-6,25of 5.29-the 5.450,529-0,545
1,863-1,8501,186-1,178UAH 1,862-UAH 1,8497,14-7,146,65 of 6.660,665-0,666
The porosity of 33%, the layer depth of 0.04 m, the average water content of 3%andin=0,03, am=0,97
1,944-1,9341,239-1.232 metric1,945-1,9347,41-7,697,21-7,440,721-0,744
at 2,324-2,2971,481-1,4632,325-2,297to 11.11-12,4912,91-14,341,291-1,434
2,698-2,7001,718-1,7202,697-2,70017,24-comprised 17.5423,25-23,682,325-2,368
Porosity of 40%, the depth of the layer of 0.01 m, the average water content of 30%andin=0,30, am=0,70
1,638-1,621,043-1,0321,637-1,6204,54-4,633,72-3,750,372-0,375
1,737-1,6671,107-of 1.0621,738-1,6675,32-5,524,62-4,600,462-0,460
1,752-1,7451,116-1,1111,752-1,7446,10-6,145,34 to 5.350,534-0,535
Porosity of 40%, the layer depth of 0.04 m, the average water content of 4%andin=0,04, am=0,96
1,921-1,9171,223-1,2211,920-1,9177,19-7,526,9-7,210,69-0,721
2,280-2,2361,452-1,4242,280-2,23610,63-11,7712,12-13,161,212-1,316
2,618-2,6181,667-1,6672,617-2,61716,13-16,3921,11-21,452,111-2,145

By comparing the numerical values of compressive stress-strain water-saturated Sands, at ultrasound frequency of 25 kHz and the intensity of radiation of sound from 0,372 to 2,786 W/cm2with regulatory limit compression resistance-breaking for placers (instruction RD 06-326-99 No. 84 of 18.11.99,) analytical way is installed, that the normal component of stress will exceed the maximum tear resistance from 3 to 14 times depending on the depth and water content, and maximum shear at a pressure of surface freezing at a temperature of 4°C (2.5 kgf/cm2by SN P II-B. 6-66, PL. 3 Applications) - from 2 to 9 times. This will ensure activation of the filtering process and the destruction of relationships in water-saturated layers of clayey sand. Then produce hydrodynamic activation by stirring the slurry element 13 mechanical installation 12 and the flow of slurry through the installation of pressure hydrotestosterone 10 for processing installation 14.

Problem solving in conditions of instability of the content of valuable components, visokoklinest and high content of fine gold complicated forms and types (flattened and in clusters) on the objects will allow at the stage of excavation of sand placers with different types of plasticity effective transformation of the structural-mechanical linkage clay component and its subsequent destruction without loss of gold, including small particles size of from 0.5 to 0.002 mm in an environmentally friendly way to reduce the destructive impacts of mining on the ecosystem, will preserve the unique natural complexes of the region.

Sources of information the

1. A.S. 1666707, RUSSIA. The method of destruction of a rock / Lmiter etc. - 30.07.1991 - bul. No. 28.

2. Pat. 2276727, Russia. The method of controlling the transformation process gold-bearing rock / Nephronia, Whammies. - 20.05.2006 - bul. No. 14.

3. Pat. 2288361, Russia. Method of softening and disintegration of clay sand gravel deposits / Ammolite etc. - 27.11.2006 - [Electronic resource]. - Mode of access: www.fips.ru.

Method of softening and disintegration of clayey Sands shallow placers, including the opening of deposits, sinking vodozabornoy trench with a slope in the direction of drop formation deposits and drainage trench depth with the height difference of the bottom of the trench from 1.5 to 3 m, water filling vodozabornoy trench with simultaneous filling of the developed area placers water to a depth that provides the mounting and installation of equipment in a floating state, and maintain this level in subsequent to initial softening clay Sands with water supply through an adjustable shutter, installation of pressure hydrotestosterone, the natural process of water filtration in the array, characterized in that makes installation of the ultrasonic installation and mechanical installation, consistently intensify the filtration of water in compacted layers of sand by means of ultrasonic treatment on the PE the CI on the surface of the developed area radiation in the range of low ultrasonic frequencies, providing the maximum amplitude of the displacement of particles compacted Sands and parameters of the radiation intensity, which creates compressive stress-strain, tear resistance and shear in excess of regulatory data strength of frozen sand placers, are intensifying the disintegration of the water-saturated surfaces Sands ultrasound with the same frequency radiation, but lower settings of the intensity of ultrasonic radiation corresponding to the average equilibrium density and compressibility of water-saturated Sands, and then produce hydrodynamic activation by stirring the slurry element of the mechanical installation and the flow of slurry through the installation of pressure hydrotestosterone to the beneficiation plant.



 

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FIELD: mechanics.

SUBSTANCE: invention is meant for separation of suspensions. Hydrocyclon includes cylinder-conic body structure with tangential intake and drain tubes, sand hole, cyclone chamber leakproofly connected to hydrocyclon and including cylinder-conic body structure with cone angle β2=120°, containing tangential feeding tube located in cylindrical section and connected to water supply device and also containing sand tube located in conical section. Conical section of hydrocyclone is put down in cyclone chamber at depth equal to 3/4 of its cylinder part, ratio of area of sections of cyclone chamber and hydrocyclon is 1:(4÷5), ratio of area of sections of sand and feeding tubes of cyclone chamber and area of section of sand hole of hydrocyclon is 1:1.5:5.5 accordingly. Method of control of hydrocyclon operation by means of change of discharging in hydrocyclon body is characterised by the following: in core zone throughout the height of hydraulic cyclone rising flow of hydraulic fluid is formed due to supply to hydrocyclon sand hole of rising water flow which is formed by tangential supply of water to cylinder part of cyclone chamber.

EFFECT: enhancement of control efficiency, increase in productivity.

3 cl, 11 dwg, 10 tbl

FIELD: mining.

SUBSTANCE: invention is related to mining and may be used for production of gold and other virgin metals from gravel deposits by washing method. Device for extraction of gold consists of elevator block fixed on stands at an angle with perforated part, beneath which there is a distributing block with slots, rigidly connected at an angle by its one end to perforated part, and by its other end - to device stand and cassette unit installed under distributing block, and this unit comprises upper and lower row of cassettes that are hingedly joined to each other with the help of upper cassette row stretching mechanism, plank that is fixed to distributing block and hingedly connected to upper end of upper row of cassettes, mechanism of low cassette row stretching, which is hingedly joined to lower edge of lower cassette row and return block. In perforated part of block there are tubes arranged across with holes along block width, which are inverted to perforated part of block. At the outlet of block tubes create a pipe, which connects to pump.

EFFECT: increased efficiency and effectiveness of gold extraction.

2 dwg

Concentrate board // 2372994

FIELD: mining.

SUBSTANCE: this invention refers to the sphere of enrichment of the material sources and can be used to separate mostly small mineral particles different by their density. Concentrate board consists of actuated deck with the groovings, the tray for the supply and washwater, drive mechanism of the board and the receiving box for the products of separation. The deck is made in the form of the circle divided for two or more sectors each having circular groovings with the progressively increasing altitude from the centre to the deck's periphery. High-frequency step motor is used as a drive mechanism. It provides continuous rotation of the board and supply of the negative ripples for the shift directed against the rotation of the board.

EFFECT: invention improves the efficiency of the separation of the particles and productivity improvement.

1 dwg

FIELD: mining industry; devices for minerals dressing using a method of heavy minerals separation.

SUBSTANCE: the invention is pertinent to mining industry, in particular, to devices for minerals dressing using a method of heavy minerals separation. The heavy minerals cone separator includes a body, a drive, an airlift with a receiving box, a drainage sifter with a drain pan and a rabble. A zone of separation is partitioned from a stagnation zone by a ring-type cleaver-pusher. The cleaver-pusher is fixed on the rabble. The drain pan of the drainage sifter is supplied with a curvilinear launder. The launder is passing along the course of rotation of the rabble into the zone of separation. An internal wall of the body and the ring-type cleaver-pusher form the zone of separation. The diameter of the cleaver-pusher makes 0.2-0.4 of the diameter of the cylindrical part of the body. Depth of its immersing in suspension concerning to the level of overflow makes 0.3-0.5 m. The drainage sifter is displaced relatively to the axis of the rabble rotation and is installed under the receiving box of the outside airlift. The technical result is an increase and stabilization of a density of suspension in the zone of separation.

EFFECT: the invention ensures an increase and stabilization of a density of suspension in the zone of separation.

3 cl, 2 dwg, 1 ex

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