RU2207911C1 - Multi-purpose washing complex - Google Patents

Abstract

FIELD: concentration of minerals; plants for extraction of gold from rock waste and gravel mixtures. SUBSTANCE: proposed complex includes vibrating bar screen with multi-row sprinkling unit mounted above it between receiving bin and deep filling sluice box, two-tier unbalanced-throw screen mounted between deep filling sluice box and shallow filling sluice box and conveyers for removal of gangue mounted behind vibrating bar screens; each sluice box is made in form of chute of rectangular cross section. EFFECT: increased extraction of fine placer gold. 3 cl, 2 dwg

Description

 The invention relates to techniques for mineral processing, and in particular to installations for the extraction of heavy minerals and metals by the gravitational method, in particular large, small and thin gold from the original boulder-gravel-sand mixtures.

 Known washing complex for the enrichment of a gold-containing pebble-sand mixture, containing rectilinear rectilinear locks of rectangular cross section communicated with the preliminary separation system of the mixture into classes, comprising a grate screen with a slit size of 150 mm and an enrichment device in the form of an inertial two-deck screen equipped with an intensive irrigation system (RU, 14854 U1, 09/10/2000, 7 V 03 V 5/00).

 This complex allows you to extract fine and fine gold from pebble-epile dumps with high performance.

 However, large pieces of rock, boulders, covered with clay muds, which contain particles of mainly large gold, are dumped into the dump, which does not provide maximum gold recovery.

 Also known is the PGNVK flushing device adopted as the closest analogue, which includes sequentially installed sand preparation and transportation unit, containing a loading hopper, a hydraulic hopper, a hydraulic elevator with a slurry line, a large gold recovery unit with short deep filling gates, a small gold recovery unit in the form of a screen and the locks installed beneath it, as well as a unit for collecting a valuable component from an over-the-shelf screen product (RU, 2080933 C1, 06/10/97, 6 V 03 V 5/00, 7/00).

 This flushing device is a rather complex and energy-intensive installation. In addition, the use of a hydraulic monitor for disintegration and loosening of sands on the screen and for cleaning the oversize product leads to significant losses of precious metals dumped into the dump with large boulder and pebble fractions, and requires additional measures to equalize the pulp flow and duplication of deep filling sluices.

 The proposed device is designed to provide high recovery of both large and small fine fine gold by gravity in a wide range of enrichment of gold sands of various sizes.

 The technical result is achieved due to the fact that in the washing complex containing the receiving hopper, a short deep filling gateway and fine filling gateways with devices in the form of corrugated coatings and stencils for trapping metal-bearing fractions, screens and conveyors for removing waste rock into the dump, between the receiving hopper and a deep-filling lock placed a grate vibrating screen, over which a multi-row irrigation unit is installed, and between the deep-filling lock and small filling locks there are two an inertial inertial roar, while waste rock conveyors are installed behind the grate vibrating roar and behind the inertial roar, and each lock of deep and shallow filling is made in the form of a rectangular groove in the cross section.

 In addition, the technical result is achieved due to the fact that the irrigation unit is made in six rows, and the fine filling gateways are made in the form of a block of three parallel installed gateways.

The invention is illustrated in the drawing, which shows a schematic representation of the complex:
- in FIG. 1 is a side view;
- in FIG. 2 is a plan view.

 The universal flushing complex (Figs. 1 and 2) includes a receiving hopper 1, a tape or plate feeder 2, an irrigation unit 3, a bunks placed with a grate vibrating screen 4, a conveyor 5 for removing coarse fractions into the waste dump, a deep filling gateway 6, inertial roar 7, conveyor 8 removal into the waste rock dump from the oversize part of the inertial roar, locks 9 shallow filling. In FIG. 2 also shows boulder 10, pebble 11 and ephelle 12 dumps.

 The device operates as follows.

 The rock mass (sands, pebbles and boulder material) is loaded into the receiving hopper 1 and fed by a tape (plate) or other feeder 2 to a heavy vibrating grate screen. Above the screen 4 there is an irrigation block 3, mainly six-row, which washes clay gold-bearing greases from large pieces of rock, which were previously largely lost with a large fraction in the enrichment waste. A large fraction (+60 -1000 mm) is removed from the grate screen by conveyor 5 to a boulder dump 10, and the sub-sieve water-gravel mixture with a grain size of less than 60 mm enters a short deep filling gate 6, where only large and partially medium-sized particles are captured in a powerful turbulent flow gold, and the water-sand mixture containing fine and fine gold is fed to a two-tier inertial screen 7, where the screening operation is carried out by size and the conveyor 8 removes washed oversized gangue with a particle size of 6 ÷ 60 mm. Due to the removal of gangue on a heavy grate 4 and medium type and inertial 7 screens, the gold content in the sublattice pulp (water-sand mixture) increases by 2.0-2.5 times. The pulp enriched with gold enters the three parallel filling gates 9 of fine filling, where fine and fine gold is caught, and the waste rock is dumped into the epoxy dump 12. Each lock is made in the form of an inclined rectangular cross-sectional gutter with a flat bottom, on which a corrugated coating is placed and stencils.

 Due to the uniform operation of the irrigation unit, effective washing of the material and removal, as a result of two-stage screening, it is possible to carry out fine filling sluices shortened to about 6.0 m long and 1.0 m wide as a result of two-stage screening into coarse rock and gravel-pebble mixture.

 Installed corrugated coating and stencils should provide the most efficient capture of gold. It is advisable to make stencils in the form of metal gratings, and the corrugated coating in the form of polyurethane mats with L-shaped flutes (RU, 14855 U1, 09/10/2000, 7 V 03 V 5/70), or in the form of rubber mats with cells formed longitudinal and transverse flutes made with a pile of synthetic material (RU, 15303 U1, 10.10.2000, 7 V 03 V 5/70).

 During the testing of the washing complex according to utility model 14854 of 09/10/00, it was noted that about 85% of the fine gold in the fine locks is concentrated at the beginning of the lock and only a small part of the gold is distributed along the entire length of the lock. This is also an important justification for the implementation of locks relatively short, 6-7 m long, instead of the 10-meter locks used. With three shortened locks and achieved complex performance, an optimal pulp flow and the best conditions for gold deposition are ensured. At the same time, it is possible to carry out locks of the simplest rectangular shape with a flat bottom, which drastically reduces the cost of their manufacture and operation in comparison with the V-shaped gutters and shaped slots for concentrate discharge used in the PGNVK washing device.

 The proposed complex does not require the development of new equipment and can be equipped with plants and assemblies mastered by the industry, for example, the GIT-41 (SMD-113) heavy grate-sifter, SMD-148-A inertial sifter, as well as the 6-row irrigation unit of Max Walter Corporation ( St. Petersburg), which to the greatest extent ensures the purity of washing large fractions with high productivity of this complex.

 The complex is simple in terms of both its constituent devices and their constructive implementation: rectangular gateways, belt feeders and conveyors, the absence of hydraulic elevators, slurry pipelines, separators.

 The proposed flushing complex is universal. It can be used for enrichment of both flesh (initial) boulder-gravel-sand mixtures and pebble-epic dumps, with the possibility of washing gold-bearing rocks of almost unlimited size (up to 500-1000 mm) and the efficient extraction of large, small and fine gold.

An experimental verification confirmed the high productivity of the complex (on average over a season more than 3000 m ³ / day of enriched raw materials) with a high degree of gold recovery (about 90%), which makes it possible to obtain a large economic effect from its use.

Claims (3)

 1. A universal washing complex for the enrichment of gold-containing sands, containing a receiving hopper, a short deep filling gateway and fine filling gateways with devices in the form of corrugated coatings and stencils for trapping metal-bearing fractions, screens and conveyors for removing waste rock into a dump, characterized in that between The receiving hopper and the deep filling gateway contain a grate vibrating screen, over which a multi-row irrigation unit is installed, and between the deep filling gateway and shallow gates a two-tier inertial screen is placed in the filling, while waste rock conveyors are installed behind the grate vibrating screen and behind the inertial screen, and each lock of deep and shallow filling is made in the form of a trench rectangular in cross section.  2. The universal washing complex according to claim 1, characterized in that the irrigation unit is made in six rows.  3. The universal flushing complex according to claim 1, characterized in that the fine filling gateways are made in the form of a block of three parallel installed gateways.

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