RU2370327C2 - Ore-concentration movable modular complex - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: invention is in the field of mineral processing, in particular in processing of gold ore of gangue quartz type of small deposits and ore occurrences. The ore-concentration movable modular complex comprises ore preparation module containing grizzly screen for preliminary screening, double-rotor inertial crusher operating in the mode of recrushing class -350+100 mm, combined impacting crusher intended for fine crushing, counterblow centrifugal crushing machine for coarse crushing, pneumatic separator for processing together with dust collecting and residual fraction discharge system and preconcentrate refining module. The refining module consists of a centrifugal disk breaker for redevelopment of fine-grained gold and spiral pneumatic separator for control processing of fine fractions prepared in centrifugal disk breaker.

EFFECT: improved dry processing of fine-grained gold, production of saleable concentrate of high quality and treatment technology simplification.

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Description

The plant is designed for processing and beneficiation of gold ore.

A known ore-dressing mobile modular complex for processing gold-bearing ores of predominantly small deposits, including ore preparation and reduction modules installed along the technological process and interconnected by vehicles, including a preliminary grate grate, a two-rotor inertial crusher operating in the mode of refinement of the -350 mm class, crusher combined impact for fine crushing, centrifugal chopper for the main herds and grinding, the gravity concentration module, consisting of two centrifugal separators of the Knelson type for the main and control enrichment, connected to each other according to the technological scheme with a spiral classifier and a ball mill, which form a cycle of regrinding of granular products, where tail products are removed with a drain classifier [1].

The disadvantage of this complex is that the enrichment module uses wet enrichment methods, which require a number of additional conditions for placement and installation (organization of water management, etc.).

An ore-dressing mobile modular complex with “dry” technology [2] with equipment layout on one transport unit, consisting of an ore preparation and reduction module, is also known. It is designed for crushing and grinding of source ore -350 mm to a fineness of 50% of the class -0.1 mm and pneumatic separation. The module contains: a preliminary screening screen, a medium-impact rotary inertial crusher, a combined-action crusher for fine crushing and coarse grinding, a counter-impact centrifugal grinder, and an air separator with a concentrate removal and tail fraction removal system.

The disadvantage of the complex is the insufficient degree of reduction of the starting material (the maximum achieved degree of reduction is 16 times), which does not allow to obtain conditioned concentrates.

These shortcomings are eliminated in the complex of processing gold-bearing ores, which includes a block of modules consisting of a grate-type screen for preliminary screening, a two-rotor inertial crusher operating in the mode of refinement of the class (-350) - (+ 100) mm, crushers of combined impact action for fine crushing, centrifugal counter impact chopper for coarse grinding; enrichment pneumatic separator with a dust collection and tail fraction removal system, and a primary concentrate finishing module, characterized in that the finishing module consists of a centrifugal-disk grinder for additionally revealing fine and thin gold and a screw pneumatic separator for control enrichment of small fractions obtained on a centrifugal-disk mill .

In contrast to the adopted analogue [1], where the main enrichment stage is functionally divided into two modules: the main enrichment module and the control enrichment module, the proposed scheme proposes one lapping module using dry technology and pneumatic separation. This makes it possible to significantly increase the depth of dry concentration from obtaining concentrates suitable for shipment to a concentrating plant, as well as significantly simplify the concentration technologies and eliminate the use of process water. Thus, this invention meets the criterion of "novelty."

In the present invention, in contrast to the adopted prototype [2], a modular complex is added, which provides for an additional reduction of the processed ore to produce a conditioned concentrate using a dry additional pneumatic beneficiation module.

The proposed control enrichment module can significantly increase the degree of enrichment by further disclosing predominantly fine and fine gold from the primary concentrate of the main module, as well as by enriching it in a screw pneumatic separator.

Thus, the alleged invention meets the criterion of "inventive step".

The invention is illustrated in the drawing, depicting a diagram of the complex.

The complex for processing gold-bearing ores according to the gravity concentration scheme contains technological modules (symbolically designated A, B), interconnected by means of transporting solid crushed material.

Module A is intended for crushing and grinding the initial ore -350 mm to a fineness of 35% of the class -0.1 mm and consists of a hopper with a feeder 1, a belt conveyor 2, a grate-mounted screen 3, a two-rotor inertial crusher (SMD-116) 4, an elevator reloader 5, inertial screen 6, combined impact crusher (DKD-300) 7, counter-impact centrifugal grinder (TsMVU-800) 8 and pneumatic separator (POS-2000) 9.

The pneumatic separation concentrate of module A is transported to module B.

Module B is intended for regrinding the concentrate obtained in a centrifugal disk grinder (CDI) 11 and its further separation in a screw pneumatic separator (VPS-250) 12.

The complex is equipped with an energy supply system and a control panel, containers for collecting and transporting concentrate (not shown).

The first module is an ore preparation module designed for crushing, reducing the initial ore and obtaining the primary concentrate by pneumatic separation, in which light and sludge particles released during dry impact crushing and grinding are removed.

The second module is designed to further reveal the fine gold of the primary concentrate by grinding and enrichment. In this module, a gold-containing concentrate is obtained, and the tails, depending on the quality, can be dumped or subject to further processing.

The complex works as follows. The initial ore with a grain size of 350 mm from the hopper of the feeder 1 is fed by a belt conveyor 2, equipped with an electromagnetic iron separator, to the grate screen 3 and is screened according to the size class of 100 mm. The positive product enters the two-rotor inertial crusher (SMD-116) 4, where pieces of the original rock are destroyed to a particle size of -40 mm. The minus screening product and the crushed product of the rotor crusher with the elevator reloader 5 are fed into the inertial screen 6 for screening in the 5 mm class, from where the plus product is sent to the combined crusher (DKD-300) 7. Here the pieces are crushed from 40 mm to 90% of class -2 mm The minus product of the screen is fed to the centrifugal counter impact chopper (TsMVU-800) 8. In the first rough grinding step in the TsMVU-800 a fineness of 50% of the class -0.074 mm is reached. This product is subjected to pneumatic separation on the pneumatic separator (POS-2000) 9, the tailings of the pneumatic separation are dump, mainly the light and finely dispersed part (dust fraction) of the ore is blown.

The reduced concentrate is transported to module B.

The primary concentrate with gold from module A is fed to a centrifugal disk grinder (CDI), the obtained fine fractions are fed for control enrichment to a screw pneumatic separator (VPS-250). Tails of module B are sent for storage.

Bibliography

1. RF patent No. 2185889. Matveev A.I., Gladyshev AM, Grigoryev A.N., Vinokurov V.P., Filippov V.E., Fedorov V.M., Novopashin M.D., Tokarev N.V., Yakovlev V.B. , Eremeeva N.G., Salomatova S.I., Sleptsova E.I. IGDS SB RAS dated May 25, 2002. Ore dressing mobile modular complex.

2. Certificate for utility model of the Russian Federation No. 12990. Matveev A.I., Vinokurov V.P., Fedorov V.M., Novopashin M.D., Yakovlev V.B., Grigoryev A.N., Gladyshev AM, Sleptsova E.S., Salomatova S.I. , Eremeeva N.G. IGDS SB RAS dated March 20, 2000. A mobile ore-dressing complex with “dry technology”.

Claims (1)

Ore dressing mobile modular complex, including an ore preparation module, consisting of a grate grate for preliminary screening, a two-rotor inertial crusher operating in the mode of refinement of -350 + 100 mm class, combined impact crushers for fine crushing, a centrifugal counter impact grinder, for coarse grinding enrichment with a dust collection system and tail fraction removal and primary concentrate finishing module, characterized in that the mode l finishing consists of a centrifugal-disc grinder for doraskrytiya small and fine gold and screw sifter for controlling the enrichment of fine fractions produced in a centrifugal-disc grinder.

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