RU2565300C1 - Underground concentrating mill - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: underground concentrating mill consists of crushing and sieving complex and concentration complex. The crushing and sieving complex consists of two or more similar sections each intended for processing of ore of the same quality. The receiving bins, the crushers and the sieve of each section are arranged one above another and connected by the same ore chute to provide gravity-flowing movement of ore. In the lower part of the mills flows of shredded ore of each section are integrated in one bin where ore is homogenised for subsequent concentration.

EFFECT: improvement of efficiency of underground concentration of ore, decrease of capital and operational expenses.

2 cl, 2 dwg

Description

The invention relates to the mining industry and is intended for underground ore processing in the development of ore steeply falling powerful and medium power deposits.

Known underground processing plant for ore dressing in the development of powerful ore deposits with the production of concentrate, located in underground workings.

A disadvantage of the known technical solution is the need to ensure the safe operation of the processing plant in the underground space for a long period of time (several tens of years), significant capital costs for the construction of the factory.

The prototype of the invention is an underground beneficiation plant according to the patent of the Russian Federation No. 2338879, which provides complete ore beneficiation in the underground space during a long period of operation of the factory. To ensure the construction and operation of an underground factory, excavating openings, technological chambers for the placement of mineral processing equipment, and a complex of auxiliary openings for moving mineral raw materials along the enrichment line are carried out.

One of the significant disadvantages of the prototype is that the underground processing plant requires significant capital costs for construction due to the need for a large volume of underground workings with heavy types of fastening and operating costs when moving the material in the enrichment process.

Another significant disadvantage of the prototype is the insufficiently high enrichment efficiency due to fluctuations in the quality of the feedstock entering the enrichment from various sites and treatment blocks of the underground mine.

The disadvantages of the prototype also include the difficulty of delivering large-sized concentrating equipment during its installation and repair of underground mine workings, which usually have a limited cross section.

The technical result of the claimed invention is to reduce capital costs by reducing the number of workings to move the processed ore in the enrichment process, reduce operating costs for this movement, increase the efficiency of underground processing by averaging the quality of the initial ore entering the enrichment, as well as ensuring the delivery of large-sized processing equipment for underground workings for its installation and repair.

The essence of the claimed invention lies in the fact that the underground processing plant, consisting of crushing and screening complex located in underground mines and a magnetic separation complex, or gravity, or flotation, or other enrichment method, is characterized in that the crushing and screening complex consists of two or more of the same type sections, each intended for processing ore of the same quality (rich or poor). The receiving hoppers, crushers and screens of each section are not placed horizontally but vertically one above the other and connected by one ore discharge to ensure gravity ore movement between all crushing and screening mechanisms, and in the lower part of the complex in order to increase the concentration efficiency of crushed ore flows of each section combine in one bunker, where ore is averaged for subsequent beneficiation.

In order to accelerate the construction of the processing complex and facilitate the repair of large equipment, each horizon of the crushing complex, where crushing, screening or other equipment is installed, is connected to each other and to the horizons of the underground mine adjacent in height by an inclined exit for the delivery of equipment or its parts, and the section of the inclined exit is taken sufficient to move the largest parts of crushing and screening equipment.

The application of the proposed technical solution will reduce capital costs for the construction of an underground processing plant by reducing the number of workings to move the processed ore in the beneficiation process, reduce the operating costs for this movement, increase the efficiency of underground beneficiation by averaging the quality of the feed ore enriched, and also to ensure the delivery of large-scale processing equipment through underground workings for its installation and repair that one.

The invention is illustrated by drawings:

FIG. 1. Schematic diagram of the crushing and screening complex of an underground processing plant.

FIG. 2. Cross section of the crushing and screening complex.

The invention is as follows:

The same sections 1 and 2 of the crushing and screening complex of the underground processing plant are located between the main (retreat) horizons 3 and 4 of the underground mine. In each section, an ore receiving hopper 5, jaw crushers 7 and 10, screens 8, 11, 13, cone crusher 14 are arranged vertically one above the other and are interconnected by a single ore pass 9. In the lower part of the complex sections 1 and 2 are connected by a feeder 15 horizon averaging hopper 16, under which the feeders of the first enrichment stage are located, for example dry magnetic separation 17. All horizons of the crushing and screening complex, on which the mechanisms are installed (crushers, screens, feeders), are interconnected with the horizons of the underground ore 3 and 4 of inclined exit 18, the cross section of which is taken to be sufficient for transporting the largest parts of crushing and screening equipment.

The extracted ore of the underground mine through the return horizon 3 enters the receiving hopper 5, with section 1 intended for processing rich ores, section 2 for processing poor ores. From the receiving hopper 5, the ore is fed by the feeder 6 to the jaw crusher 7, from it by gravity through the ore discharge 9 it enters the stationary screen 8. The upper product by gravity enters the jaw crusher 10 of the second crushing stage, the lower product through the ore discharge 9 wakes up to the screen 11 and 13 of the second and third stage of screening. The crushed ore from the jaw crusher 10 also passes through the ore pass 9 to the screens 11 and 13. The top product of the screens 11 is returned for processing to the jaw crushers 10 using a conveyor system 12.

The upper product of the screens 13 flows by gravity to the cone crushers 14, of which the ore discharge 9 together with the lower product of the screens 13 also flows by gravity to the feeder 15 of the averaging hopper 16. In the averaging hopper 16, the rich ore stream of section 1 is connected to the flow of poor ore of 2 sections, averaged and from the hopper 16 it enters the feeders of the first enrichment stage 17, for example, to dry magnetic separation separators.

The proposed technical solution allows to reduce capital costs for the construction of an underground processing plant by reducing the number of workings to move the processed ore in the enrichment process, to reduce the operating costs for this movement, to increase the efficiency of underground processing by averaging the quality of the source ore for enrichment, and also to ensure delivery of large-sized concentrating equipment through underground workings for its installation and repair.

Information sources

1. Efremovtsev N.S., Abramov V.F., Lushnikov V.I. et al. New technology for the development of ore deposits // Mining Journal - 1985 - No. 10 - p. 35-38.

2. Schwartz Yu.D., Semigin R.I., Zitser I.S., Kutuzov D.S. Waste-free mining and processing production on the basis of underground complexes // Mining Journal - 1992, - No. 5, - p. 42-45.

3. Patent for the invention of the Russian Federation No. 2454281 E21C 41/16, published on June 27, 2012.

4. Bastan P.P. Theory and practice of ore averaging // P.P. Bastan, E.I. Azbel, E.I. Klyuchkin. - M .: Nedra, 1979, - 255 p.

Claims (2)

1. Underground processing plant, consisting of crushing and screening complex and magnetic separation complex, or gravity, or flotation, or other enrichment method located in underground workings, characterized in that the crushing and screening complex consists of two or more sections of the same type, designed, each, for processing ores of different quality, and the receiving hoppers, crushers and screens of each section are vertically stacked and connected by one ore discharge to allow gravity flow ore crushing and between all grohotilnymi mechanisms, and in the lower part of the complex to increase the efficiency of enrichment of the crushed ore streams of each section are combined in one homogenizing silo where averaging ore for subsequent enrichment. 2. The underground processing plant according to claim 1, characterized in that each horizon of the crushing complex, where crushing, screening or other equipment is installed, is connected to each other and to inclined congresses adjacent to the height of the underground mine to deliver equipment or parts thereof, and inclined exit take sufficient to move the largest parts of crushing and screening equipment.

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