Method for softening and disintegration of clay sands and hydromixture solid component

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 involves deposit opening, digging a water supply trench slanted towards the deposit stratum drop and a water collection trench; the accumulator trench is dug between the area under development and the water collection trench. One mounts the suction device of the delivery hydrotransportation installation, mounts an ultrasonic installation relative to the accumulation trench, consistently intensifies filtration of water into the clay sands within the flooded area on the surface and by way of hydrodynamic activation and performs cutting the water saturated sand layers with the hydrodynamic equipment cutter elements, additional hydrodynamic initiation and ultrasonic impact on the hydromixture in the accumulation trench in the low frequencies band providing better effect of hydromixture particles displacement and ultrasound radiation intensity 5 W/cm2 or more.

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

1 tbl, 2 dwg

 

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 the destruction of the middle - and 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 pedwar the positive selection of the controlled range of particle sizes, determine the optimal exposure time at which ensured the stability of the 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 is th water filtration in the array, installation of pressure hydrotestosterone. At the end of the discharge slurry line 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 and solid component of the slurry, 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 mounting and installation the hydrodynamic 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, the driving of the cumulative trench is carried out between the developed area and a drainage trench, produce a suction device installation pressure hydrotestosterone and installation of the devices relative to the cumulative trench, consistently intensify filtering water in clayey Sands on the flooded area on the surface by hydrodynamic activation by stirring the slurry centrifugal mechanism and carry out the cutting elements of the cutting hydrodynamic equipment water-saturated layers of sand, hydrodynamic activation paddle mechanism formed by the slurry on the surface of the developed area, pripuskanie the formed slurry in cumulative trench to maintain a uniform ratio of solid to liquid in cumulative trench adjustable shutter and supply additional water from the drainage trench pressure hydrotestosterone, ultrasonic effect on the slurry in the cumulative trench in the low frequency range, providing great is th effect displacement of the particles of the slurry and the radiation intensity of the ultrasound is from 5 W/cm 2above.

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 the natural process of filtering water in a sealed and water-saturated layers of clayey sand and disintegration slurry clay particles by ultrasonic impact.

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 ζ displacement of the particles of the slurry in the sound wave from the pressure of the ultrasound P, oscillatory displacement of the particles of the slurry at a ratio of solid to liquid T:W: 3:7 is shown by dots ... and 6:4 is shown as a solid line __.

The implementation of how the weakening and disintegration of clayey Sands and solid component of the slurry is carried out 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 5 with the height difference of the bottom 6 in trenches 1 and 4 from 1.5 to 3 m, the driving of the cumulative trench 7 take place between the developed area 8 and a drainage trench 4. Connect the cumulative trench 7 and developed part 8 between itself and establish between them adjustable shutter 9. Adjustable shutter 9 Perek is to see access to water in the collection trench 7. Make the filling water vodozabornoy trench 1 with simultaneous filling of the developed area 8 placers water to a depth of 10, providing installation and installation of the hydrodynamic equipment 11 in a floating state, and maintain this level in the next 12 to the primary softening clay Sands with water supply through an adjustable shutter 13. Produce the suction device 14 installation pressure hydrotestosterone 15 and the mounting of the ultrasonic installation 16 relative to the cumulative trench 7, and hydrodynamic equipment 11 - on the developed area 8, in the slaughter. Consistently intensify filtering water in clayey Sands on flooded area 8 on the surface 17 by means of hydrodynamic activation by stirring the slurry blade mechanism 18 and carry the cutting elements of the cutting 19 hydrodynamic equipment 11 water-saturated layers of sand. Carry out hydrodynamic activation of the blade mechanism 18 formed by the slurry on the surface 17 of the developed area 8 and pripuskanie formed slurry in cumulative trench 7 with maintaining a uniform ratio of solid to liquid in cumulative trench 7 adjustable shutter 9 and the supply of additional water from the drainage trench 4 pressure what gidrotransportirovanie device 20. Ultrasonic effect on the slurry with an estimated equivalent equilibrium wave impedance ρe·e(where ρethe density of the medium, withe- the speed of longitudinal sound waves in the environment) funded in the trench 7 is carried out in a low range of ultrasonic frequencies, providing greater effect displacement ζ particle slurry, and the intensity I of the radiation of the ultrasound from 5 W/cm2and above using ultrasonic installation 16, (see figure 2 and table).

Table
The numerical values of the initial parameters of the radiation intensity ultrasound, providing specified amplitudes of oscillatory displacement of particles of the slurry in the sound wave, the radiation frequency f=25 kHz
The calculated equivalent equilibrium wave resistance of slurry (ρe·e)·106kg/m2s, T:WThe initial parameters of the intensity I in W/cm2given the amplitudes of the displacement |ξe| and the ratio of T:W
e|=10-6me|=10-5me|=10-4m
3:76:43:76:43:76:43:76:4
1,7171,9102,122,352,12·1022,35·1022,12·1042,35·104
1.9761,9622,432,422,43·1022,42·1022,43·1042,42·104
2,0052,0112,472,482,47·1022,48·1022,47·1042,48·104
2.0762,1392,562,642,56·1022,64·102 2,56·1042,64·104
2,100at 2,1782,62,682,6·1022,68·1022,6·1042,68·104
2,1182,1952,612,7052,61·1022,705·1022,61·1042,705·104

By means of the suction device 14 installation pressure hydrotestosterone 15 slurry is fed to the concentrating equipment 21.

The method will ensure environmental safety and loss reduction of fine gold particles size of from 0.5 to 0.002 mm in the development of high-clayey gold placers.

Sources of information

1. SU 1666707, publ. 30.07.1991

2. EN 2276727, publ. 20.05.2006

3. EN 2288361, publ. 27.11.2006

Method of softening and disintegration of clayey Sands and solid component of the slurry, including the opening of deposits, sinking vodozabornoy trench with a slope in the direction of drop formation of the Deposit and the catchment area of the first trench depth with the height difference of the bottom of the trench from 1.5 to 3 m, filling water vodozabornoy trench with simultaneous filling of the developed area placers water to a depth that provides installation and installation of the hydrodynamic 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, wherein the driving of the cumulative trench is carried out between the developed area and a drainage trench, produce a suction device installation pressure hydrotestosterone and installation of the devices relative to the cumulative trench, consistently intensify filtering water in clayey Sands on the flooded area on the surface by hydrodynamic activation mixing slurry centrifugal mechanism and carry out the cutting elements of the cutting hydrodynamic equipment water-saturated layers of sand, hydrodynamic activation paddle mechanism formed by the slurry on the surface of the developed area, pripuskanie formed slurry in cumulative trench to maintain a uniform ratio of solid to liquid in cumulative tra the neck adjustable shutter and supply additional water from the drainage trench pressure hydrotestosterone, ultrasonic effect on the slurry in the cumulative trench in the low frequency range, providing greater effect displacement of the particles of the slurry, and the radiation intensity of the ultrasound is from 5 W/cm2and above.



 

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