RU2177368C2 - Production line for concentration of loose gold-diamond containing rocks - Google Patents

Abstract

FIELD: concentration of minerals, particularly, loose rocks of placer deposits, crusts of weathering, conglomerates, technogenic and other deposits containing free gold and diamonds. SUBSTANCE: production line includes loading device; disintegrating cylinder screen with three sieves; vibration concentrators for withdrawal of gold nuggets, diamond crystals, obtaining concentrates with fine diamonds of minus 1 mm - plus 1 mm, reduction of concentrates of jigging machines; unbalanced-throw three-sieve screen for screening of undersize product; jigging machines for fine intercylinder screen product and for use for one of three fractions produced on unbalanced-throw screen; device for direction of the fourth fraction sizing minus 1 mm to one or two branches of main and control centrifugal separators; device for dewatering and removal of sludges sizing minus 1 mm. Claimed invention allows to withdraw efficiently of gold into concentrates beginning from grains of micron sizes to nuggets, and diamonds sizing from 0.1 mm to large crystals by ecologically clean method. EFFECT: ecologically clean method. 1 dwg

Description

 The invention relates to the enrichment of minerals, in particular loose rocks, including placer deposits, weathering crusts, conglomerates, industrial and other deposits containing free gold and diamonds.

 For the enrichment of gold-containing sands, a technological line is known, embodied in dredges, industrial instruments PKBO, TOK-200 with jigging machines, including vehicles installed and interconnected during the technological process: loading device, drum screen-disintegrator (sometimes with a scrubbing part), landfill, basic and cleanup jigging machines, basic and finishing concentration tables (Zamyatin O.V. et al. Improvement of basic technologies for sand enrichment for drag ah and industrial devices.- M .: Mining Journal, 1994, N 11, p. 46-48).

The disadvantages of this production line are:
- incomplete disintegration of hard-washed deposits;
- insufficiently complete extraction of fine and thin gold and nuggets;
- the inability to extract diamonds.

 The closest in technical essence is the production line for the enrichment of loose gold-diamond-bearing rocks, including devices installed during the process and interconnected: loading device, drum screen disintegrator, device for receiving and mixing fractions, dumping excess water with sludge and flow distribution into two parts with the flow direction to two parallel-located trays of the vibration concentrator, a vibration concentrator with two main and one up vodka trays and a hydro pulsator and a pumping station with a system of water and slurry pipelines (see SU 1438062 A1, B 03 B 5/26, 05/10/1995).

The processing line has the following disadvantages:
- has an intermittent cycle of work, designed for a certain amount of samples;
- with the discharge of sludge, fine (-0.1 + 0.05 mm) and fine (-0.05 mm) gold is lost;
- the inability to extract nuggets and diamond crystals larger than 8 mm.

 The present invention is directed to the enrichment of loose gold-diamond deposits in one technological line of devices with the allocation of free gold and diamond crystals into rich concentrates. The production line for the enrichment of loose gold-diamond-bearing rocks includes a loading device, a drum screen, a vibrating concentrator and a pump station with a system of water and slurry pipelines, while the production line is equipped with a continuous scrubber installed in front of a drum screen-disintegrator made with a three-screen, self-propelled vibrator a hub for the extraction of gold nuggets and diamond crystals from a large inter-drum product, inertial with a three-sieve screen for sieving the under-sieve drum product, a jigging machine for a small inter-drum product and three jigging machines for enriching one of the three fractions obtained on an inertial screen, a device for directing the flow of pulp of the fourth fraction with a particle size of minus 1 mm to one of the two main and control chains centrifugal separators, behind which there is a device for dewatering and removing sludge with a particle size of minus 0.1 mm and a vibration concentrator to obtain concentrates with small diamonds minus 1 mm plus 0.1 mm, installed behind each of the jigging machines by vibration concentrators to reduce their concentrates and obtain concentrates containing gold and diamonds, using a spreader, and the bottom of the trays of each vibration concentrator have perforation in the enrichment zones corresponding to the lower sizes of fractions to be reduced concentrates.

 A continuous scrubber allows you to adjust the quality of disintegration in a continuous stream, which helps to release gold grains and diamond crystals from clay deposits and reduce losses.

 A three-sieve drum screen-disintegrator allows to increase screening efficiency, to carry out additional disintegration and scrubbing of material from clay muds and to reduce the content of small classes in products.

 The self-trapping vibration concentrator allows for the extraction of large gold nuggets and diamond crystals from a large inter-drum product in a continuous stream.

 The jigging machine for a small inter-drum product allows the extraction of small gold nuggets and diamond crystals into a concentrate. A vibration concentrator installed behind a jigging machine for a small inter-drum product allows to reduce concentrate with small gold nuggets and diamond crystals. An inertial three-sieve screen for sieving the under-sieve product allows the under-sieve product to be dispersed into four narrow fractions.

 Jigging machines installed behind an inertial three-sieve screen operate on a narrow classification scale, are the main devices for enrichment, and allow high-efficiency efficient extraction of diamond crystals and precious metal grains into concentrates.

 The device for directing the flow of pulp has a simple design and allows you to alternately direct the flow to one of the two chains of centrifugal separators.

 The main and control centrifugal separators have a simple design and a small yield of concentrates. The use of the main and control separators provides high extraction of small and thin classes (up to 10-5 microns) of precious metals. Considering that centrifugal separators have an intermittent cycle of work, two chains of centrifugal separators operating alternately are included in the production line.

 A device for dewatering and removing sludge with a particle size of minus 0.1 mm and a vibration concentrator installed behind it make it possible to obtain concentrates with small diamonds from a granular product.

 Vibratory concentrators to reduce the concentrates of jigging machines make it possible to obtain concentrates with gold grains and diamond crystals.

 The spreader allows the oversize product of the drum screen disintegrator, the tailings of the vibration concentrator for large inter-drum product and the tailings of the jigging machine for small inter-drum product to be dumped.

 The drawing shows a processing line for the enrichment of loose gold-diamond rocks.

 The technological line includes: loading device 1, continuous scrubber 2, three-screen drum screen-disintegrator 3, self-trapping vibration concentrator 4, jigging machine 5 for small inter-drum product, inertial three-screening screen 6, jigging machines 7, 8 and 9, device 10 for guiding pulp flow, the main 11 and control 12 centrifugal separators, a device 13 for dewatering and removing sludge, a vibration concentrator 14 to obtain concentrates with small diamonds, vibration con centralizers 15, 16, 17 and 18 for reducing concentrates of jigging machines, a spreader 19 for harvesting tailings of large fractions and a pump station 20 with a system of water and slurry pipelines.

 The technological line works as follows.

 The original loose rocks are loaded into the loading device 1 and sent to a continuous scrubber 2, where in an aqueous medium at L: T = 1.5-2.5: 1 they undergo disintegration without violating the integrity of diamond crystals. The disintegrated material from the scrubber is fed into a three-sieve drum screen-disintegrator 3 with an internal perforation of 32 mm, an average perforation of 16 mm and an external perforation of 8 mm. In a three-sieve drum screen-disintegrator 3, the material is subjected to mixing, additional disintegration and rubbing from clay muds and scattered into four fractions.

 A large fraction plus 32 mm is fed to the dumping unit 19. A fraction of -32 + 16 mm is sent to a self-trapping vibration concentrator (VKS) 4 to extract gold nuggets and diamond crystals under the influence of vibration fields due to intense segregation by density. The tailings of the VKS 4 are sent to the spreader 19.

 The fraction of -16 + 8 mm enters the jigging machine 5, where the valuable components are divided into concentrates and tails in accordance with their densities in the pulsating vertical jets of water. The tailings of the jigging machine 5 are sent to the spreader 19.

 The sublattice product minus 8 mm is fed to an inertial three-sieve screen 6 with 4x4, 2x2, 1x1 mm cells for sieving into four fractions. Three fractions with a particle size of -8 + 4 mm, -4 + 2 mm and -2 + 1 mm are separately sent to their own jigging machine 7, 8 and 9 for the concentration of precious metals and diamonds. The fourth fraction with a particle size of minus 1 mm enters the device 10 for directing the flow of pulp to one of two chains of centrifugal separators operating alternately. The main 11 centrifugal separator is designed to extract noble metal grains smaller than 1 mm in centrifugal fields. Tails of the main 11 centrifugal separator enter the control 12 centrifugal separator for additional trapping of metal. The tails of the control 12 centrifugal separators are sent to the device 13 for dewatering and removing sludge with a particle size of minus 0.1 mm, the diamond-containing granular product with a particle size of minus 1 mm plus 0.1 mm is enriched in a vibration concentrator 14 to obtain a concentrate with small diamonds. The tailings of the vibration concentrator 14 are discharged into the settling pond.

 Concentrates of jigging machines 5, 7, 8 and 9 are reduced on vibration concentrators (VK) 15, 16, 17 and 18 to obtain concentrates containing gold and diamonds, and the bottoms of the trays of each vibration concentrator have perforations in the concentration zones corresponding to the lower sizes of the fractions to be reduced concentrates.

 Tails of jigging machines 7.8 and 9 are sent to the settling pond.

 Concentrates VKS 4, centrifugal separators 11 and 12, VK 14, 15, 16, 17 and 18 are sent for refinement to the SCO (SHOW).

 The pump station 20 through the piping system delivers recycled water from the settling pond to all apparatuses of the technological line, and the slurry piping system ensures the passage of pulp between the technological apparatuses of the line and discharges the tailings into the settling pond.

 The enrichment of gold-diamond-containing loose rocks on this production line makes it possible to efficiently extract gold starting from micron-sized grains to nuggets and diamonds with a grain size of 0.1 mm to large crystals by environmentally friendly enrichment methods in almost all deposits of loose deposits of gold-diamond raw materials.

Claims (1)

 A production line for enrichment of loose gold-diamond-bearing rocks, including a loading device, a drum screen, a vibrating concentrator and a pump station with a water and slurry piping system, characterized in that the production line is equipped with a continuous scrubber installed in front of a three-screen drum screen-disintegrator , a self-trapping vibration concentrator for extracting gold nuggets and diamond crystals from a large inter-drum product basics, an inertial three-sieve screen for sieving the under-sieve drum product, a jigging machine for a small inter-drum product, and three jigging machines for enriching one of the three fractions obtained on an inertial screen, a device for directing the flow of pulp of the fourth fraction with a particle size of minus 1 mm to one of the two main chains and control centrifugal separators, behind which there is a device for dewatering and removing sludge with a particle size of minus 0.1 mm and a vibration concentrator to obtain concentrates grates with small diamonds minus 1 mm plus 0.1 mm, mounted behind each of the jigging machines by vibration concentrators to reduce their concentrates and obtain concentrates containing gold and diamonds, using a heap former, and the bottom of the trays of each vibration concentrator have perforation in the enrichment zones corresponding to the lower fraction sizes of reduced concentrates.