RU2797471C1 - Gold ore enrichment plant - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: methods for enrichment of gold ores of clay and kaolinite type. The gold ore enrichment plant includes a receiving hopper, a trommel mixer, a sieve, a twin-rotor mixer, screw conveyors, a crusher, a settling tank, and a jigging chamber. The receiving hopper includes a receiving tank with an irrigation system installed on the frame, and a loading chute into the trommel mixer. The trommel mixer is made in the form of a drum, which consists of a disintegrating part with radially arranged blades and an unloading part equipped with a spiral. An additional irrigation collector is installed in the trommel mixer. The sieve is a chute with a mesh bottom, fixed on the body of a two-rotor mixer, which is a container with two shafts with blades fixed on them, which rotate towards each other. The crusher is a cylindrical container with atmospheric pressure air dischargers connected to it, isolated from the crusher body and located opposite each other.

EFFECT: increasing the gold extraction efficiency.

1 cl, 1 dwg

Description

The invention relates to the mining industry, and in particular to methods for enrichment of gold ores of clay and kaolinite type.

From the prior art, an ore-dressing mobile modular complex is known (RU 2370327, publ.: 20.10.2009, bull. No. 29), which includes an ore preparation module consisting of a grate for pre-screening, a two-rotor inertial crusher operating in the re-crushing mode of class (-350 )-(+100) mm, combined impact crushers for fine crushing, counter-impact centrifugal grinder for coarse crushing, pneumatic separator for enrichment with dust collection and tailings removal system, and primary concentrate finishing module. The refining module consists of a centrifugal disc grinder for additional opening of fine and fine gold and a screw pneumatic separator for control enrichment of fine fractions obtained on a centrifugal disc grinder. The disadvantage of this technical solution is the insufficiently efficient extraction of fine gold.

The closest in technical essence is the gold-bearing ores processing complex (RU 2123891, Published: 12/27/1998), which includes a crushing module, a grinding module, an enrichment module and a finishing module connected to each other in the course of the technological process by vehicles. The crushing module consists of medium and fine crushing plants, made in the form of two jaw crushers and a centrifugal crusher, respectively, and an inertial screen connected in an open cycle with a medium crushing plant and in a closed circuit with a fine crushing plant. The disadvantage of this technical solution is the insufficiently efficient extraction of fine gold.

The technical problem to be solved by the invention is to develop an efficient installation for the extraction of fine gold, easy to operate.

This problem is solved by the fact that the installation for the enrichment of gold ores includes a receiving hopper, a mixer-butara, a sieve, a twin-rotor mixer, screw conveyors, a crusher, a sump, a jigging chamber, a receiving hopper includes a receiving tank with an irrigation system installed on the frame, and a loading chute in mixer-butara, the mixer-butara is made in the form of a drum, which consists of a disintegrating part with radially arranged blades and an unloading part equipped with a spiral, an additional irrigation collector is inserted into the mixer-butara, the sieve is a chute with a mesh bottom, fixed on the body of a two-rotor mixer , which is a container with two shafts with blades fixed on them, which rotate towards each other, the crusher is a cylindrical container with atmospheric pressure air dischargers connected to it, isolated from the crusher body and located opposite each other.

The technical result provided by the above set of features is to increase the efficiency of fine gold extraction. The claimed installation allows to shorten the technological chain and eliminate environmentally dirty processes such as the use of chemical reagents or radiometric processes that increase the background radiation.

The technical result is achieved by using the Yutkin electrohydraulic effect (EGE), which allows you to locally increase the pressure to several tens of thousands of atmospheres. Due to the incompressibility of water and, as a result, the distribution of this pressure throughout the water volume, this property can be used to crush and grind rock. After crushing, the pressure in the pulp decreases due to an increase in the cross-sectional area of the pipeline, which leads to a decrease in its viscosity and, as a result, an increase in the sedimentation rate.

The gold beneficiation unit makes it possible to disperse the rock, forming a pulp, to release fine inclusions of gold and separate them from the pulp.

The essence of the invention is illustrated by drawings, which show:

in fig. 1 - general view of the installation, where:

1 - receiving hopper

2 - butara mixer

3 - sieve

4 - two-rotor mixer

5 - screw conveyors

6 - crusher EGE

7 - sump

8 - jigging chamber.

The installation includes a receiving hopper 1, a butara mixer 2, a sieve, a twin-rotor mixer 4, screw conveyors 5, a crusher 6 with an electro-hydraulic effect, a sump 7, a jigging chamber 8.

The receiving hopper 1 includes a receiving tank with an irrigation system installed on the frame and a loading chute into the mixer-butara. Due to the supply of irrigation in the receiving hopper, the primary erosion of the material occurs. The unloading of the receiving hopper is carried out using the loading chute, which is included in the cavity of the mixer-butary.

Butara mixer 2 is made in the form of a drum, which consists of a disintegrating part with radially arranged blades and an unloading part equipped with a spiral. An additional irrigation collector is brought into the mixer. In the mixer there is an additional irrigation and mixing of the pulp. The pulp is unloaded from the butary mixer through a conical part equipped with a spiral that promotes the movement of the pulp.

Sieve 3 is a chute with a mesh bottom with a cell of 50x50 mm, fixed on the body of a two-rotor mixer 4. Large pieces of rock on the sieve are screened out, and the pulp enters the two-rotor mixer.

Twin-rotor mixer 4 is a container with two shafts with blades fixed on them, which rotate towards each other. In a double-rotor mixer, additional erosion of rock pieces and stirring of the pulp takes place to obtain the most homogeneous medium. Then, through the flange connection, the pulp enters the screw conveyors 5.

Screw conveyors 5 are screw augers enclosed in pipes that feed pulp into the EGE crusher through flange connections.

Crusher EGE 6 is a cylindrical container with a side loading of the material with two atmospheric pressure air dischargers connected to it, which also have a side arrangement. The arresters are isolated from the crusher body and located opposite each other at a distance of 200 mm. In the EGE crusher, the Yutkin electro-hydraulic effect is created, which leads to crushing and grinding of rock and the release of fine gold particles. The crushing process takes place at a voltage of 20 to 50 kV, with a pulsation frequency of 25 to 100 Hz.

Next, the pulp with the contained metal particles through the flange connection enters the sump 7.

Settler 7 is a cylindrical container in which the material flow rate decreases and gold particles settle. The sump is connected to the jigging chamber 8 by a flange connection.

The jigging chamber 8 is a cylindrical cavity with a lowered receiving part, where the heaviest particles containing gold are deposited and transferred through a flange connection for subsequent washing. Lighter pulp without gold enters the sump.

The use of the EGE 6 crusher will make it possible to develop relatively small deposits of gold-bearing chemical weathering crusts of a linear-karst morphological type, which are widespread in southwestern Siberia, to reduce the cost of technological construction and reduce the negative impact on the environment.

The installation works as follows. The rock enters the receiving hopper, where it is washed out and the primary pulp is formed, then the pulp enters the butara mixer, where the subsequent erosion and averaging of the pulp takes place, after which the pulp passes through a sieve to screen out large unwashed stones and enters a double-rotor mixer. Then the pulp is fed by screw conveyors to the EGE crusher, where the rock is dispersed until fine gold inclusions are released and metal ingots increase due to the sedimentation process. Then the slurry passes through a settling tank with an increased cross-sectional area, in this area the gold particles begin to settle in the lower part of the pipe. Further, the pulp is separated in the jigging chamber, the main flow without gold enters the settling tank, and the pulp with settled gold from the chute in the lower part enters for washing.

Claims (1)

Gold-bearing ores beneficiation plant, including a receiving hopper, a butara mixer, a sieve, a twin-rotor mixer, screw conveyors, a crusher, a settling tank, a jigging chamber, characterized in that the receiving hopper includes a receiving tank with an irrigation system installed on the frame, and a loading chute into the mixer - butara, the mixer-butara is made in the form of a drum, which consists of a disintegrating part with radially arranged blades and an unloading part equipped with a spiral, an additional irrigation collector is inserted into the mixer-butara, the sieve is a trough with a mesh bottom, fixed on the body of a two-rotor mixer, which is a container with two shafts with blades fixed on them, which rotate towards each other, the crusher is a cylindrical container with atmospheric pressure air dischargers connected to it, isolated from the crusher body and located opposite each other.

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