RU69420U1 - COMPLEX OF DRY CONCENTRATION OF DIAMOND-CONTAINING KIMBERLITE ORE - Google Patents

Abstract

The complex of dry concentration of diamond-containing kimberlite ore is intended for primary processing of ores directly at the deposit and includes modules for the disintegration of the initial ore and intermediate products installed during the technological process and connected by means of transportation, classification modules for crushed initial ore and intermediate products, and modules for the processing of industrial products made in the form of X-ray fluorescent separators, module for pneumatic classification of small intermediate products, including pneumatic class indicator, air supply and dust deposition system, aspiration module. The initial ore disintegration module includes a jaw crusher for primary crushing and a rotary impact crusher for the second crushing stage, which is installed at the output of the oversize product of the initial crushed ore classification module. The industrial products disintegration module includes a roller-press for primary crushing of industrial products installed at the outlet of tail products of coarse and medium beneficiation modules and a rotary impact crusher for completing industrial products, installed at the output of the roller press and over-the-shelf product of the classification module for crushed initial ore and industrial products. When using the complex, it becomes possible to process mineral raw materials in conditions of remoteness of the deposit from stationary processing plants, to increase the profitability of the development of deposits with a low diamond content. 1 ill.

Description

The utility model relates to the field of mining, specifically to the primary processing of dry diamond-containing raw materials directly at the deposit.

Known ore-dressing mobile modular complex with "dry" technology, protected by a certificate for a utility model of the Russian Federation No. 12990 (V03V 7/00, publ. BI No. 8, 2000), which consists of vehicle-connected modules for crushing, grinding and enrichment and is equipped with pre-screening grate, two-rotor inertial crusher, combined impact crusher for fine crushing, counter-impact centrifugal grinder for main grinding and pneumatic separator, dust collector system water, the line for the removal of the tail fraction and concentrate connected in series, air classification system installed in a closed circuit with a centrifugal grinder, and all devices are combined into one transportable technological module. The ore-dressing mobile modular complex according to the patent of the Russian Federation No. 2185889 (B03B 9/00, 7/00, publ. BI No. 21, 2002) is also known, the crushing and grinding module of which includes the preliminary grate grate, two-rotor inertial crusher, combined crusher impact action for fine crushing, a counter-impact centrifugal chopper for main grinding, and the enrichment module consists of Knelson centrifugal separators for main and control enrichment, a spiral classifier and ball m lnitsy.

The disadvantage of these complexes is the use in the schemes of crushing and grinding equipment for fine grinding, not applicable to ore raw materials, requiring intact disintegration technology.

A known complex for the extraction of diamonds from diamond-containing raw materials directly at the place of extraction, including equipment for disintegration of the original ore (jaw or cone crushers) installed during the process and connected by vehicles

equipment for the classification of disintegrated source ore and industrial products with a particle size of 2-50 mm, equipment for the air classification of fractions with a particle size of less than 2 mm, equipment for the disintegration of industrial products (planetary mill for self-grinding and / or roller press), equipment for the classification of under-sizing products, X-ray luminescent separators for primary processing large, medium and small industrial products, means of delivery of industrial concentrates received to the processing plant for refinement (p RF patent No. 2094126, B03B 7/00, 1997).

However, this complex cannot provide sufficiently efficient processing of dry diamond-containing raw materials, because the process of disintegration in a planetary mill and / or in a roller press is accompanied by the formation of frozen ore agglomerates at negative temperatures, requiring additional equipment for their destruction. In addition, there is not sufficient environmental safety when processing small productive material.

A known complex of dry concentration of diamond-containing kimberlite ore (prototype) directly in the place of extraction, which contains the module for the disintegration of the initial ore, the module for the classification of the disintegrated initial ore and intermediate products, the module for the disintegration of the initial ore and intermediate products, the module for the classification of under-sized industrial products, installed during the technological process and connected by vehicles enrichment modules for large, medium and small intermediate products, made in the form of X-ray luminescent separators Hur, delivery vehicles derived promkontsentratov to the processing plant for finishing (RF patent №2247607, V07V 9/00, BI №7, 2005). The initial ore disintegration module includes a jaw or roller gear crusher, the industrial product disintegration module is made in the form of an inertial cone crusher.

However, this complex cannot provide effective processing of dry diamond-containing raw materials due to the use of crushing and grinding equipment for the disintegration of industrial products, which is simultaneously used to disintegrate the initial ore and whose operation at low temperatures is accompanied by the formation of frozen agglomerates requiring additional equipment for their destruction.

In addition, the above complex cannot be used for processing the original ore with a particle size of -1200 + 0 mm, which significantly limits the scope of its application.

The technical result of the claimed utility model is to increase the efficiency of ore processing (in particular, diamond-containing ore) through the use of more efficient equipment for disintegration, increasing the upper limit of disintegration of the original ore, reducing the amount of material supplied for further enrichment, ensuring the safety of the useful component (diamond crystals) in the processes of disintegration of industrial products.

To carry out a dry concentration of diamond-containing kimberlite ore with a grain size of -1200 + 0 mm directly at the deposit, a complex of dry concentration of diamond-containing kimberlite ore was developed directly at the deposit, including disintegration modules for the initial ore and industrial products installed during the technological process and related by means of transportation, classification modules for crushed initial ore and intermediate products, modules enrichment of industrial products made in the form of X-ray luminescent separators, pneumatic class module pecifications fine middlings, comprising a pneumatic classifier, means for supplying air and dust deposition system, the aspiration module. The initial ore disintegration module includes a jaw crusher for primary crushing and a rotary impact crusher for the second crushing stage, the industrial products disintegration module includes a roller press for primary crushing of industrial products and a rotary impact crusher for completing industrial products, while a rotary impact crusher for the second crushing stage the source ore is installed at the output of the oversize product of the classification module for the source of crushed ore, a roller press of the module for disintegration of of products was installed at the outlet of tail products of coarse and medium enrichment modules, a rotary crusher for completing intermediate products was installed at the outlet of a roller press and an over-screen product of the classification module for crushed initial ore and intermediate products, which is a difference from the prototype and proof of the novelty of the claimed utility model.

Thanks to this solution, diamond processing can be carried out

directly at the place of extraction of diamond-containing raw materials using a modular complex capable of working with dry raw materials with a grain size of -1200 + 0 mm without damaging the diamond crystals contained in it, while ensuring the necessary environmental cleanliness due to efficient dust deposition. For the crushing of the initial ore, two-stage crushing is used (the first stage of crushing in a jaw crusher and the second stage in a rotary impact crusher), and for the disintegration of industrial products, a roller press is used, for the destruction of agglomerates of which and for disintegration of a class of more than 30 mm, a rotary impact crusher is used. In the proposed complex, classification and dust collection, pneumoclassification operations are carried out, during the implementation of which technological classes of -30 + 10, -10 + 5, -5 + 1.6 and -1.6 mm are received, which are directed respectively to the enrichment modules of large, medium, small industrial products and dump.

When using the complex, there is no need to transport substandard feedstock to an enrichment plant, where there are water circulation systems and systems for collecting and storing enrichment waste, the operation of which requires high energy costs and the creation of large water and tailing dumps.

The use of a roller press in the present invention solely for the completion of industrial products that do not contain free diamonds, allows you to preserve the natural integrity of the diamond crystals during completion. On the other hand, in the proposed technical solution, a targeted final grinding of the material in a closed cycle with classification and enrichment is provided, which makes it possible to extract all diamonds that are not opened during primary crushing. The presence of a cycle of completing industrial products allows us to provide technological flexibility of the complex. Thus, the developed complex for the implementation of dry processing of diamond ore directly at the deposit allows to increase the efficiency of the process due to the fact that the application of the proposed complex will reduce the amount of material supplied to stationary processing plants, as well as to obtain a product for further processing with a given particle size distribution and crystals of diamonds without chips and

other surface damage.

Figure 1 presents a circuit diagram of the apparatus of the complex.

The complex of dry concentration of diamond-containing kimberlite ore includes a module for the first stage of crushing of the initial ore I, a module for preliminary classification of the disintegrated initial ore II, a module for the second stage of crushing of the initial ore III, a classification module for the crushed initial ore and intermediate products IV, enrichment modules for large, medium, and small industrial products V, pneumatic classification module for small intermediate VI, aspiration module VII, first stage disintegration module for intermediate VIII and second stage for disintegration module uu (recrushing) middlings IX, associated transport means.

The initial ore crushing module I is intended for crushing ore with a particle size of less than 1200 mm to the size of a maximum piece of the second crushing stage. It contains a hopper 1, a plate feeder 2 and a jaw crusher 3. Module I is transported by means of a jaw crusher disintegration product 3 through a conveyor 4 connected to module II (grate or inertial screen 5).

The preliminary classification module II (screen 5) is designed for screening according to the particle size class 30 mm of crushing product of the jaw crusher 3 and is connected to module III by conveyor 11, feeding material with a particle size of more than 30 mm to the second stage of crushing, with module IV by conveyor 32, feeding to screening and dust removal disintegrated material of impact rotor crushers of the second stage of crushing of the initial ore 12 and the second stage of regrinding of industrial products 31.

Module III is designed for crushing a product with a particle size of more than 30 mm and includes a rotary impact crusher 12 of the second crushing stage. Module III is connected to module IV by a conveyor 32.

Module IV is designed for dedusting and screening of a disintegrated medium crushing product together with a product of the second stage of finishing the industrial product and ready for enrichment product of preliminary screening for four industrial products: sieve is larger than 30 mm, large 10-30 mm, medium 5-10 mm and small 0-5 mm, made in the form of an inertial screen 6 with an aspiration system 13. Module IV is connected to the enrichment module of large and medium industrial products V by means of transportation,

conveyors 8 and 9, respectively, with the pneumatic classification module of small intermediate VI - conveyor 10, with module IX of the second stage of regrinding of intermediate products - conveyors 7 and 30, feeding material with a particle size of more than 30 mm to the impact impact rotary crusher 31 to the second stage of regrinding of intermediate products. The sub-sieve product of 0-5 mm screen 6 is conveyed by conveyor 10 to the pneumatic classification module for small intermediate VI.

The enrichment module for large, medium, and small industrial products V is intended for primary enrichment of specific ore fractions (diamond separation), includes X-ray luminescent separators 15, 16, 17. Large industrial product separators 15 are connected by a conveyor 18 to a roller press 28 and means for transporting industrial concentrates with a particle size of 10-30 mm 34a for lapping operations. The separators of the middle industrial product 16 are connected by a conveyor 18 with a roller press 28 and means for transporting industrial concentrates with a particle size of 5-10 mm 34b for finishing operations. Small industrial product separators 17 are connected by conveyor 19 with waste rock cone 22 and means for transporting industrial concentrates with a size of -5 + 1.6 mm 34v for finishing operations.

The pneumatic classification module for small intermediate VI is designed to isolate unproductive material with a grain size of less than 1.6 mm from the particle size class 0-5 mm, contains a pneumatic classifier in the form of a cascade-gravity classifier 23, a dust deposition system in the form of a cyclone precipitator 24 and is connected to the fan 25 a system of air pipelines (not shown in FIG. 1) through a suction module VII, with a waste rock cone 22 with a system of conveyors 20, 21 and with separators for the enrichment of small industrial product 17 with a conveyor 26.

Aspiration module VII consists of at least one main module designed to purify the air emitted into the atmosphere from the cyclone precipitator 24 of the pneumatic classification module for small intermediate VI and associated with the latter duct system and at least one additional aspiration module for remove dusty air from places of intense dust generation associated with the dust removal ducts 13 by the duct system (not shown in FIG. 1). Aspiration module VII is connected to the waste rock cone 22 by a conveyor system 20, 21.

The modules for the disintegration of industrial products VIII, IX for the completion of the return of the industrial product (tail product of enrichment of the separators 15, 16) contain a roller press of the first stage of crushing of the intermediate products 28 and a rotary crusher of impact action 31 of the second stage of completing the intermediate products, to which, in addition, the fraction + is sent by conveyor 7 30 mm from pre-classification module II. Module VIII is connected to module IX by a system of conveyors 29 and 30, and to module IV by a conveyor 32.

A metal trap 33 is attached to the conveyor belt 4 to prevent metal from entering into subsequent operations. Above the equipment where intensive dust formation is possible, air ducts 13 are installed for suction and dust collection associated with the suction modules VII.

The complex works as follows. The initial ore with a particle size of 0-1200 mm enters the hopper 1, then by means of a plate feeder 2 into the jaw crusher 3 (module I).

The product of crushing of the jaw crusher by conveyor 4 is fed to preliminary screening 5, the sieve product of which (+30 mm) is fed to the second stage of crushing of the initial ore into the impact rotor crusher 12, and the sieve product (-30 mm) is fed to the conveyor 32, which also disintegrated products of the rotary impact crusher of the second stage of crushing the initial ore 12 and the rotary impact crusher of the second stage of completing the finished products 31 come. Next, the material is conveyed by conveyor 32 for classification and on an inertial screen 6 (module IV), the under-sieve product of which is conveyed through a conveyor 10 for pneumatic classification (module VI), where the productive class 1.6-5 mm and the non-productive class -1.6 mm are separated on the cascade-gravity classifier 23 after dust particles are separated from it in the precipitating cyclone 24, together with the material emitted during aspiration on module VII (in the cyclone battery 27) of dusty air, it is supplied through an aerodynamic shutter 14 by a system of conveyors 20, 21 to the waste rock cone 22.

The industrial product of the screen 6 with a particle size of 10-30 mm is conveyed by conveyor 8 to X-ray luminescent separators 15, where the concentrate and tail product are separated, the latter is conveyed by 18 to the roller press 28 (module

VIII), the industrial product of the screen 6 with a particle size of 5-10 mm is conveyed by conveyor 9 for primary enrichment to the X-ray fluorescent separators 16, where the concentrate and tail product are separated, the latter is conveyed by conveyors 18 to the roller press 28, the over-screen product of screen 6 with a particle size of more than 30 mm is conveyed by 7, 30 is fed into a rotary impact crusher 31 to destroy agglomerates of the roller press and to finish the class +30 mm (module IX), into which, in addition, the disintegrated product of the roller press 28 is sent.

The pneumatic classification material with a particle size of 1.6-5 mm is conveyed by a conveyor 26 to small industrial product separators 17, where concentrate and tail product are separated. The tail product by conveyor 19 is fed to the waste rock cone 22.

Concentrates of enrichment modules V with the help of transportation means 34a, 34b and 34c are sent for refinement.

When using the complex, it becomes possible to process mineral raw materials in conditions of remoteness of the deposit from stationary processing plants, to increase the profitability of the development of deposits with a low diamond content.

Claims (1)

A complex of dry concentration of diamond-containing kimberlite ore, including modules for the disintegration of the initial ore and intermediate products installed during the technological process and connected by means of transportation, classification modules for crushed initial ore and intermediate products, modules for the processing of intermediate products made in the form of X-ray fluorescent separators, a pneumatic classification module for small intermediate products, including pneumatic classifier, air supply and dust deposition system, aspiration module, characterized in that the initial ore disintegration module includes a jaw crusher for primary crushing and a rotary impact crusher for the second crushing stage, the industrial product disintegration module includes a roller press for primary crushing of industrial products and a rotary impact crusher for the completion of industrial products, while the rotary impact crusher for the second stage of crushing of the initial ore, it is installed at the output of the over-sieve product of the classification module for the source of crushed ore, a roller press m modulus of disintegration of industrial products installed at the exit of tail Product modules of large and medium enrichment, impact crusher for recrushing installed at the exit roller press and oversize product classification module crushed initial ore and industrial products.