RU2596156C1 - Method for gravity concentration of sands of placers with high content of fine and thin gold - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention can be used in developing natural and technogenic gravel deposits of mineral deposits with high content of fine and thin gold. Method for gravity concentration of sands of placers with high content of fine and thin gold is performed in alignment of forward feed pulp with vibration jigging by means of installation, including a board, rigidly connected without any gaps with installed in series with stepped reduction by limiters relative to horizontal line and provided with artificial foundation with horizontal perforated base of jigging compartments, system for loosening bed of jigging material in form of mechanical vibrator, system for feeding water into jigging compartments, accumulation in lower part of jigging compartments of jigging material and its periodic unloading. Forward feeding of pulp in sold to liquid ratio of 1:4 is carried out successively into working zones of jigging compartments with artificial saddles in form of crushed rock with size of lumps from 10 to 30 mm and layer thickness of up to 100 mm, by cascade flow through U-shaped slots whose width is at least twice greater than maximum size of piece of rock in pulp, in upper part of limiters on upper level of artificial foundation and mounted between jigging compartments to create extra turbulence. While filling artificial foundation with jigging material with a period of its accumulation of 10-15 minutes. vibration-shaking is carried out by mechanical vibrator system for bed loosening, arranged on sides of apparatus, equipped with elastic supports for 3-5 minutes without stopping pulp feed. After next unloading of jigging material, jigging compartments are filled with water.

EFFECT: higher efficiency of extraction of fine and thin gold from primary materials of placers without additional disintegration of sands, including high-clay, higher reliability.

1 cl, 2 dwg

Description

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

A known method of extracting gold from pulp of gold-containing raw materials, purified from particles with an ultimate particle size greater than about 1.5 mm and particles with an ultimate particle size less than about 0.04 mm, in which the said pulp is first divided into fractions with different ultimate particle sizes by means of hydroclassifiers, the aforementioned are separately concentrated fractions by means of vibroconcentrators separately enrich the obtained concentrates on the concentration tables and subject the obtained superconcentrates to magnetic and electrostatic separation. The proposed method is carried out using a device for the enrichment of gold-containing raw materials containing at least two hydroclassifiers, at least two vibration concentrators, at least two concentration tables and a sump [1].

The disadvantages of the method are the need for additional preliminary separation operations by size other than disintegration of the primary material and multi-stage on separate devices for hydroclassification and vibration concentration.

A known method of separation in a shaking channel. Food is introduced from the cone when the content of solid to liquid T: W as 1: 2. Heavy material is deposited on the bottom of the gutter and transported at a speed of 0.1 m / s, and light material is overflowed at a speed of 0.5 m / s. The bottom of the gutter is perforated and divided into several sections along the length, each with its own separately controlled water supply [2].

The method has a narrow focus and is intended for the separation of thin materials that have undergone preliminary disintegration, destruction, grinding and are not intended to enrich primary materials, for example, high-clay placers.

The closest in technical essence and application are the methods of enrichment of coarse ore based on the Halkin depositing machine with movable sieves installed by means of an adjustable mechanism installed in the depositing compartments in series with a stepwise decrease relative to the horizontal, a water recirculation system [3], and primary or secondary enrichment of the material in the process of combining direct-flow pulp feed with vibro-deposition using a jigging machine, including sides, rigidly connected without a gap in with installed sequentially with a stepwise lowering relative to the horizontal and equipped with an artificial bed with a horizontal perforated base, jig compartments, a loosening bed of jigging material in the form of a drive mechanism mounted on the sides of the hull or on the walls of jigging compartments, an independent additional water supply to the jigging compartments, accumulation in the lower part of the jigging compartments of jigging material and its periodic unloading [4].

These methods, carried out by means of jigging machines capable of processing rock mass that has passed the stage of disintegration or the preliminary stage of gravitational enrichment at locks, do not adapt to the task of efficiently extracting fine gold, have high losses of fine and fine gold when processing sands, especially high-clay sand of placers , require significant maintenance costs and have low reliability.

The technical result consists in increasing the efficiency of extracting fine and fine gold from primary materials of placers, increasing reliability and reducing operating costs.

The technical result is achieved by the fact that the method of gravitational enrichment of sands of placers with a high content of fine and fine gold is carried out in the process of combining the direct-flow pulp feed with vibration damping using an installation that includes sides rigidly connected without gaps and installed in series with stepwise reduction using limiters relative to the horizontal and jig compartments equipped with an artificial bed with a horizontal perforated base; an adder material in the form of a mechanical vibrator, a water supply system to the depositor compartments, accumulation of depositor material in the lower part of the depositor compartments and its periodic unloading, direct-flow pulp supply in the ratio T: W as 1: 4 enters sequentially into the working zones of the depositor compartments with artificial beds in in the form of crushed rock with a size of pieces from 10 to 30 mm and a layer thickness of up to 100 mm, by cascading overflow through the maximum size of a piece of rock in the pulp U-arr. significant grooves made in the upper part of the limiters at the upper level of the artificial bed and installed between the jig compartments to create additional turbulence, while vibrating-shaking using a mechanical vibrator of the loosening system as the artificial bed is filled with jigging material with an accumulation period of 10-15 min bed mounted on the sides of the unit, equipped with elastic supports, for 3-5 minutes without stopping the supply of pulp, after the next unloading of the jig Rial carry out filling of depository compartments with water.

The possibility of forming the required sequence of actions in a new way and with the proposed tools allows us to solve the problem, determines the novelty, industrial applicability and inventive step of development.

The method of gravitational enrichment of placer sands with a high content of fine and fine gold is shown in the drawings.

In FIG. 1 is a transverse section of the first jigging compartment in front of the limiters; in FIG. 2 is a section AA in FIG. 1 shows a step transition from one compartment to another; the starboard side of the installation, caught in the cut, is not shown.

The method is carried out at the installation 1, including the sides 2, rigidly connected without gaps, installed sequentially with a step 3 lowering relative to the horizontal 4 and equipped with an artificial bed 5 with a horizontal perforated base 6 jigging compartments 7, 8, 9. The system of loosening the bed 10 jigging material in the form mechanical vibrator 11 is connected with the sides 2 of the installation 1. The water supply system 12 to the depository compartments 7, 8, 9 is installed in the lower part 13 for reasons of economy of metal for manufacturing. In the lower part 13 of jigging compartments 7, 8, 9, the jigging material is periodically unloaded through the unloading device 14. In the working areas of 15 jigging compartments 7, 8, 9, artificial beds 5 are placed in the form of crushed rock 16 on the horizontal perforated bases 6 with the size of pieces from 10 to 30 mm and a layer thickness of 17 to 100 mm. In the upper part 18 of the limiters 19, at the height of the upper level 20 of the artificial bed 5, U-shaped grooves 21 are made, exceeding in width 22 at least twice the maximum size of a piece of rock in the pulp. Installation 1 is equipped with elastic supports 23.

The method of gravitational enrichment of placer sands with a high content of fine and fine gold is implemented as follows.

Previously, using the water supply system 12 of the installation 1, including the sides 2, rigidly connected without gaps with jigging compartments 7, 8, 9, fill all jigging compartments 7, 8, 9 with water. Then carry out direct-feed pulp in a ratio of T: W as 1: 4. The pulp enters sequentially into the working areas 15 of the depository compartments 7, 8, 9, installed sequentially with a step 3 lowering relative to the horizontal 4, through artificial beds 5 in the form of crushed rock 16 with a piece size of 10 to 30 mm and a layer thickness of 17 to 100 mm, by cascading over U-shaped grooves 21, exceeding in width 22 not less than two times the maximum size of a piece of rock in the pulp. Performed in the upper part 18 of the restrictors 19 at the upper level 20 of the artificial bed 5 and installed between the depositing compartments 7, 8, 9, the U-shaped grooves 21 create increased pulp flow turbulence. There is additional disintegration of the solid component of the pulp, the separation of small particles of valuable components from clay particles. As the artificial bed 5 is filled with jigging material with a period of accumulation of 10-15 minutes, vibration-shaking is carried out using a mechanical vibrator 11 of the bed loosening system 10, mounted on the sides 2 of the installation 1 with elastic supports 23. This activates the passage of small and denser particles of valuable components through an artificial bed 5. Light particles are carried out by a stream of pulp in a mode of light turbulence, and heavy particles of minerals penetrate between the cracks of crushed rock 16 artificial bed 5 and black horizontal perforated holes of the base 6 fall into jigging compartments 7, 8, 9. Vibration-shaking was carried out for 3-5 minutes without stopping the supply of the pulp. There is an accumulation in the lower part 13 of the depositor compartments 7, 8, 9 of the depositor material. After the next unloading of the jigging material through the unloading device 14 using the water supply system 12, the jigging compartments 7, 8, 9 are again filled with water and the operation cycle is repeated.

The method provides an increase in the efficiency of extraction of fine and fine gold from primary materials of placers without additional disintegration of sands, including high clay, improves reliability due to the simplicity of design and reduced operating costs for maintenance.

Information sources

1. Pat. 2483807, B03B 9/00. The method of extracting gold and a device for the enrichment of gold-containing raw materials.

2. Burt P.O. with the participation of Mills K. Gravitational enrichment technology: Trans. from English / Per. E.D. Bagacheva. - M .: Nedra, 1990 .-- 574 p.: Ill., P. 177-178, fig. 9.24.

3. Burt P.O. with the participation of Mills K. Gravitational enrichment technology: Trans. from English / Per. E.D. Bagacheva. - M .: Nedra, 1990 .-- 574 p.: Ill., P. 202-203, fig. 10.9.

4. Burt P.O. with the participation of Mills K. Gravitational enrichment technology: Trans. from English / Per. E.D. Bagacheva. - M .: Nedra, 1990 .-- 574 p.: Ill., P. 191-192, fig. 10.1, p. 206-207, fig. 10.14-10.15.

Claims (1)

The method of gravitational enrichment of placer sands with a high content of fine and fine gold is carried out in the process of combining the direct-flow pulp feed with a vibratory sludge using an installation comprising boards, rigidly connected without gaps, installed sequentially with stepwise lowering using limiters relative to the horizontal and equipped with an artificial bed with horizontal perforated the base of jigging compartments, the system of loosening the bed of jigging material in the form of a mechanical vi a brother, a system for supplying water to the depositing compartments, accumulation of depositing material in the lower part of the depositing compartments and its periodic unloading, characterized in that the direct-flow pulp in the ratio T: F as 1: 4 enters sequentially into the working areas of the depositing compartments with artificial beds in the form crushed rock with a piece size of 10 to 30 mm and a layer thickness of up to 100 mm, through cascade flowing through U-shaped grooves exceeding at least twice the maximum size of a piece of rock in the pulp e in the upper part of the limiters on the upper level of the artificial bed and installed between the jig compartments to create additional turbulence, while vibrating-shaking with the help of a mechanical vibrator of the bed loosening system installed, as the artificial bed is filled with jigging material with a period of accumulation of 10-15 minutes on the sides of the installation, equipped with elastic supports, for 3-5 minutes without stopping the pulp supply, after the next unloading of the depositing material is carried out for Filling the depositors with water.

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