Gold-bearing rock transformation operation control method

FIELD: mining, particularly to develop gold-bearing rock with high clay content.

SUBSTANCE: method involves loosening rock by applying mechanical action to the rock along with periodically initiating elastic vibrations in ultrasonic-frequency band with constant frequency in clay-sand rock - water system, wherein the elastic vibrations are initiated under constant outer pressure and power for different time periods; determining optimal action application time to provide stable clay particle precipitation in clay-sand rock - water system having constant volume during previously choosing controllable particle dimension range; determining conditional transformation coefficients from mathematical expression; making plot of conditional transformation coefficient change as a function of time; determining increase of controllable initial specific surface of particles to be loosened and halving ultrasound power when controllable initial specific surface of particles to be loosened is increased by an order.

EFFECT: reduced specific power consumption.

6 dwg

 

The invention relates to processes of directional changes in properties and States of rocks when developing high-clayey deposits.

Known methods for ultrasonic processing of materials with subsequent grinding /1, 2/.

These methods do not provide control over the process of structural adjustment of cultivated systems and management.

Known methods of separation clay fine mass from minerals using ultrasound /3, 4/.

These methods do not provide for the control and management of the process.

The closest in technical essence is a way directional changes the state of argillaceous 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 /5/.

The disadvantage of this method is the inability to achieve an accurate control and process control, as analytical research and monitoring are carried out on the basis of the macroscopic analysis, the ratio of the mass of rocks before and after dispersion. The piece of clay after treatment is raznobraznuyu structure, which when draining water and removing the piece will be partially disintegrate, what will cause a great pogress is here the result.

The technical result of the proposed method lies in the possibility of flexible monitoring and control process on the basis Pololikashvili data close to microscopic.

The technical result is achieved due to the fact that in the method of controlling 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 when the preliminary 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

where γuzthat γmthat γand- specific surface of the particles, after ultrasonic treatment, after mechanical activation and the initial state of the system, respectively;

mf, Mto- actual and reference mass fraction of dispersed particles in the measured size range, respectively,

build schedule is modify the specified transformation ratios from time of which is determined by a controlled increase of the initial value of the specific surface razuprochneniya particles on the order in which lower power ultrasonic radiation twice.

The combination of significant new features allows you to solve a new technical problem is to intensify the process of production through the implementation of process control and management.

Figure 1 - scheme of the experimental setup; figure 2 - General scheme of the experimental studies; figure 3 is a graph of stability of the clay after scoring on installing ULTRASONIC MACHINE with power 2 W (1), 5 W (2) and 10 W (3); figure 4 - histogram of the distribution of the dispersion particles Solov'ev clay in the range of 1,19 - 171,48 μm, after mechanical activation; figure 5 - histogram of the distribution of the dispersion particles Solov'ev clay in the range of 1,19 - 171,48 μm after ultrasonic treatment on the installation of the ULTRASONIC MACHINE Model USD 150V NO. 8403014, IMAHASHI MFG. CO. JAPAN, 10 watt, time - 10 minutes 6 is a diagram showing changes in the conditional transformation coefficient by ultrasound exposure on gold disperse system.

The implementation of the method was carried out in the pilot plant ULTRASONIC MACHINE Model 150B USD NO. 8403014, IMAHASHI MFG. CO. JAPAN 1 emitter 2. Capacity 3 with sandy-clayey rock, placed in distilled water were placed in zonegate emitter 2. After mechanical activation for 1 minute by stirring at 50 min-1the sand and clay rock - water was subjected to ultrasonic treatment by ULTRASONIC MACHINE Model 150B USD NO. 8403014, IMAHASHI MFG. CO. JAPAN 1. Using the laser microprobe diffraction particle size "analysette 22" (Laser Particle Sizer "Analysette 22") 4 at all stages control is performed after the specific surface area of particles γuzthat γmthat γandin the selected range of particle sizes 1,19-171,48 μm, 5, 6. The processing of sand and clay rocks (mine Solov'ev) was carried out at time intervals of 5; 8; 10; 15 minutes and power of 2; 5; 10 watts. Emission frequency of 19.5 kHz. After establishing the optimal time impact on the system, which ensured the stability of the clay particles (figure 3), was determined by the maximum power setting of the generator 5 for the initial period of exposure and the calculation of conditional transformation ratio

where γuzthat γmthat γand- specific surface of the particles, after ultrasonic treatment, after mechanical activation and the initial state of the system, respectively.

mf, Mto- actual and reference mass fraction of dispersed particles in the measured size range relevant to the military.

Based on these results, conditional transformation ratio, we plot changes conditional transformation coefficient depending on time 6. When increasing the initial value of the specific surface of particles on the order of reducing power of ultrasonic radiation twice, with the same frequency, exposure time and ambient conditions, did not entail loss of physical system parameters, such as curve 4 figure 6.

The implementation of the method in industry is possible in a multi-level setting for the disintegration of the clay material [6] and geotechnical complexes with multi-disintegration[7, 8, 9, 10]. The management process may include obtaining data about the system in automatic mode with the help of special sensors.

A method of choosing technological settings of ultrasonic emitters, forming a directional change of the structural and mechanical properties of sandy-clayey rocks provides the definition of the area of the power settings depending on the increase of the source parameter of the specific surface of particles at constant values of the frequency of radiation and the time of its impact. This allows you to improve manufacturability and reduce the energy intensity of the process.

Sources of information

1. Friedman V.M., kotlarski LB, Novi the cue astray freight Ultrasonic chemical engineering equipment. M, CINTIA, 1964.

2. Novitsky astray freight study on the effects of ultrasound on chemical engineering processes associated with the dispersion of solids in liquids. Abstract of Diss. Odessa, 1965.

3. Wood R.W., Loomis, A. L. The Physicaland Biological Effects of High Frequency Sound Waves of Great Intensity. "Phill. Mag." 1927, vol.7, No. 4.

4. Wetzel W. Ultiashal - Aufbereitung von Gesteinproben. "Erdol und Kohle", 1950, 3.

5. Acoustic technology in mineral processing /Aigulin, Leesarow, Vieten and other ed Usersyou. -M.: Nedra, 1987, pp.31-46.

6. Khrunina I.E. multi-level setting for the disintegration of the clay material: Patent RU 2234376, the IPC 02 19/18, 20.08.04, bull. No. 23.

7. Khrunina N.P., Mamaev Y.A. Processing geotechnological complex: Patent RU 2204441, the IPC 03 7/00, 9/00, 20.05.03, bull. No. 14.

8. Khrunina N.P., Mamaev Y.A. Geotechnological complex with multilevel disintegration: Patent RU 2209974, the IPC 03 5/02, 03 At 5/52, 10.08.03, bull. No. 22.

9. Khrunina I.E. Geotechnological complex with multilevel disintegration: Patent RU 2206403, the IPC 03 7/00, 9/00, 20.06.03, bull.№17.

10. Khrunina NP and other Geotechnological complex with multilevel disintegration: Patent RU 2209678, the IPC 03 5/00, E 21 41/26, 10.08.03, bull.№22.

The method of controlling the transformation process gold-bearing rocks, including the loss of strength of the rock mechanical in what Sodeistvie with subsequent periodic initiation of elastic waves in the ultrasonic range with a constant frequency in the sand and clay rock - water, characterized in that the initiation of elastic waves is carried out at a constant external pressure, different time intervals and capacities when the preliminary 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

where γuzthat γmthat γand- specific surface of the particles after ultrasonic treatment, after mechanical activation and the initial state of the system, respectively,

mf, Mto- actual and reference mass fraction of dispersed particles in the measured size range, respectively,

build a graph of 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.



 

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