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INVENTION
Russian Federation Patent RU2098193
Installations for the extraction of substances and particles (gold, platinum, silver, etc.).
OF SUSPENSIONS AND SOLUTIONS
Name of the inventor: Zhabreev VS
The name of the patentee: Chelyabinsk State Technical University
Address for correspondence:
Starting date of the patent: 1995.07.26
Usage: technology and equipment for the extraction of particles of disperse systems and can be used for the extraction of gold and metals and their oxides, protein substances to extract, for cleaning and disinfection. The inventive apparatus for extracting substances and particles from the suspensions and solutions containing the isolated stem electrodes connected to a voltage source arranged in the housing and in which are made drain holes and input. Installation has three concentrically mounted in the housing to one another cylindrical drum, of which two inner metal and a dielectric medium are fixed, and the outer dielectric - rotatably. Rod electrodes are placed in the walls of the fixed dielectric drum in His image on the part of the circle. a drum mounted in the body itself so that the electrodes are arranged on the axis of the inlet channel to the extracted edges to exit the material on which is mounted a scraper. voltage source is disposed inside of a metal drum.
DESCRIPTION OF THE INVENTION
The invention relates to the art and technology to extract the particles from the dispersed systems (suspensions, colloidal solutions, suspensions), and can be used in mining to extract the free metal (gold, platinum, etc.), Oxides of most metals, proteins, etc. .d. for the separation of charged particles for water purification.
After processing in waste rock and tailings remains a certain amount of precious metals, mainly in small fractions. Existing methods and devices for the enrichment of gold ores are not sufficiently effective to maximize the extraction of gold from the dumps and placer deposits, containing a little gold.
Known solution to mineral dressing (1), the essence of which consists in the fact that the gold ore is ground and classified, and sand to drain. enrichment Efficiency is enhanced by the fact that the grinding is carried out in rotary pulsation apparatus of hydraulic action. grain size classification of a granite Sands sent to regrinding and rotary-pulsation device.
The disadvantage of this device is that it does not provide for the extraction of the smallest particles.
The known plant obezmetallivaniya gold solutions containing cementing a casing with input and output pipes and solution-cementing alternating layers of metal, which to improve the quality of the gold precipitate further contains layers of inert material, perforated plate, is fixedly mounted in the upper and lower housing parts.
Layers cementing metal and inert material and interleaved in the compressed packet perforated plates, and the inert layer is made of a carbon material such as graphitized batt (2).
This facilitates installation obezmetallivaniyu solutions, but does not solve the problem of tiny particles of gold extraction.
The closest to the claimed solution is an apparatus (3), comprising a housing with inlet and discharge openings mounted in the housing, two concentrically arranged cylindrical drum, one of which is mounted fixedly and the other outer, is rotatably isolated electrodes connected to the source of voltage.
However, this device is only intended for cleaning of the particles and does not allow for separation (sorting) of the particles. In the treatment of liquid media, there are significant energy losses due to electrolysis, and low productivity.
The invention is aimed at expanding the functionality of the device separation (sorting) particles and increase the efficiency of extraction of particles and fines from the suspensions and solutions, but also reducing energy consumption.
This is achieved in that the device for extracting substances and particles from the suspensions and solutions, comprising a housing with inlet and discharge openings mounted in the housing, two concentrically arranged cylindrical drum, one of which is mounted fixedly and the other outer, is rotatably mounted, isolated electrodes connected to the voltage source according to the invention provided with an additional cylindrical drum mounted fixedly within the drum concentrically to them, wherein the inner drum is metal, middle and outer drums are made of a dielectric body is formed with a channel for the exit of the extracted material, on which is installed scraper rod and the electrodes formed and arranged in the middle of the drum wall by forming it on a part of its surface, extending from the inlet channel to the axis of the housing to the exit edge of the recovered material, and a voltage source located inside of a metal drum.
A feature of the installation is that the electrostatic field in the working area of the installation at the surface of the outer drum is created due to boundary effects of rod electrodes. When this field has a gradient with increasing intensity to the drum surface. Therefore, the metal particles are attracted to the outer drum by the Coulomb force acting in one direction on the induced charges in the particles.
Since a constant electrostatic field, the potential energy of the capacitor formed by the rod electrodes and the inner drum, electric power costs high voltage lines are determined by small leakage currents.
The main costs of electricity are determined rotary drive at a constant speed of the outer drum. The installation is characterized by a low electric power consumption.
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FIG. 1 shows a sectional construction of the installation of the drum perpendicular to the axis of rotation; FIG. 2 installation structure in section along the axis of rotation of the drum.
The installation comprises a fixed body 1 on the axes 2 and 3, one inside the other concentrically cylindrical drums. Inner metal drum 4 and 5 of the middle dielectric drum mounted fixedly in housing 1. The outer drum 6 made of an insulator and is connected to the actuator 7 to rotate. The walls of the drum 5 at its generatrix apart circumferentially disposed rod electrode 8, and the drum is mounted in the housing so that the electrodes 8 are located on the axis 9 of the inlet hopper 10 to the edge of the channel 11 to exit 12 of the extracted material. Inside the housing 1 12 is positioned over the channel 13, a scraper for cleaning the drum 6. The bottom of the housing 1 formed drain holes 14 for draining water and slurry outlet (solution) 15. In the wall of the housing 1 there are openings 16 for water filling. The metal drum cavity 4 is placed the voltage source 17, which is connected rod electrodes 8 and which is the same as the actuator 7 is connected to the network.
INSTALLATION WORKS AS FOLLOWS
The starting material (wet sand, slurry, solution) through the hopper 10 is applied to the rotating drum of the dielectric 6. Under the action of the electrostatic field electrodes 8 corresponding metal particles sign induced charge are attracted to the surface of the drum, and on the other sign particles repulsive force operates. The particles, which are not affected by the forces of gravity, when turning the drum 6 are deposited, followed by removal through the channel to exit 15. Held particles by electrostatic forces continue to come out of the scope of the field of the electrodes 8 and 13 are removed with a scraper, then go through the channel 12. The electric field is produced by a high DC voltage of the voltage source 17, which is one pole connected to the metal cylinder 4, the other to the electrodes 8. The electric field created by the edge effect around the electrodes 8. The rotation of the drum of the insulator 6 is provided by a drive 6. The fluid level in the body is maintained by the drain channel 14 and via filling hole 16.
Improving the efficiency of extraction of the smallest particles (gold) due to the use of the gradient of the electrostatic field, which repels particles of opposite sign, which allows for the separation of materials. By using the edge effect of closely spaced isolated electrodes to create a high intensity field of 10 to 10 V / m. The minimum size is limited in comparison with gravity methods or by size filtering means. Recovered material stands out with a small amount of water. Low electricity consumption due to a combination of permanent electrostatic field for separating and retaining particles and their mechanical extraction using a rotating drum outside the field of action. Installation is characterized by high security, since all the electrodes are insulated.
Industrial Applicability: Extraction of precious metals, kaolin purification, cleaning and disinfection of water, separation of materials.
CLAIM
Installation for extracting substances and particles from the suspensions and solutions, comprising a housing with inlet and discharge openings mounted in the housing, two concentrically arranged cylindrical drum, one of which is mounted fixedly and the other outer rotatably mounted isolated electrodes connected to the voltage source, characterized in that it is provided with an additional cylindrical drum mounted fixedly within the drum concentrically to them, wherein the inner drum is metal, middle and outer drums are made of a dielectric body is formed with a channel for the exit of the extracted material over which is mounted a scraper, and electrodes are rod and are located in the walls of the drum at its middle into parts forming surface extending from the inlet channel to the axis of the housing to exit the edge of the extracted material, wherein a voltage source is disposed within a metal drum.
print version
Publication date 05.12.2006gg
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