RU2730076C2 - Modular processing plant - Google Patents

Abstract

FIELD: ore-dressing industry.SUBSTANCE: invention relates to coal beneficiation. Modular enrichment plant includes equipment for coal beneficiation, connected in a single process scheme, at least part of which is mounted on demountable frames and installed on base foundation. Collapsible frames are made of rolled metal beams. Prefabricated reinforced concrete slab is used as the foundation. Proposed equipment comprises dry screen, heavy-duty drum separator, screen for dehydration and washing of suspension, electromagnetic drum separator, thickener, belt filter press, belt conveyors and pump units. Water-slurry circuit is closed, the flow rate of process water added does not exceed 10 m/h, the water can be supplied by means of pumps from the independent sources. Power supply can be performed by means of one or several diesel-generators.EFFECT: technical result is provision of coal beneficiation in close proximity to extraction place with observance of autonomy, environmental safety and with possibility of enrichment plant movement.1 cl, 3 tbl, 4 dwg

Description

The invention relates to coal beneficiation and can be used in the mining and processing industry.

Coal processing plants are widely known, which are mining enterprises for the processing of a large volume of raw materials extracted from one or a group of mining enterprises (mines or open pits).

The disadvantages of processing plants are that their construction is advisable only with a sufficiently large volume of raw materials (several million tons per year), involves costly, lengthy and labor-intensive preparatory and maintenance work, high consumption of energy and water resources. Concentrating plants are capital construction projects, which excludes the possibility of their relocation. Wastes from the production of concentration plants significantly pollute the ecology of their location and require processing and reclamation.

Known mobile geological enrichment plants, for example, Field modular geological enrichment plant manufactured by the company "Itomak" (Internet address: http://www.itomak.ru/items/complex/5.php). This installation is used in the gold mining industry and is designed for enrichment and study of prospecting geological samples, for the development of prospecting and exploration of new deposits. It (like other mobile geological concentration plants similar to it) cannot be used for coal preparation and has low productivity.

The closest analogue of the present invention is a modular installation for coal beneficiation, including beneficiation equipment connected in a single technological scheme, mounted on collapsible frames and installed on a base-foundation (CN 206304891 U, 07/07/2017, В03В 7/00). This modular unit does not allow achieving high rates of mobility, autonomy and environmental safety when enriching coal in the immediate vicinity of the mining site.

The technical result of the invention is to ensure the beneficiation of coal in the immediate vicinity of the mining site while observing the autonomy, environmental safety and with the possibility of moving the concentrator.

The technical result is achieved by the fact that the collapsible frames are made of rolled metal beams, a prefabricated reinforced concrete slab is used as a foundation, the equipment includes a dry grading screen, a heavy-medium drum separator, a screen for dewatering and washing off a suspension, an electromagnetic drum separator, a thickener, a belt filter press, belt conveyors and pumping units, the water-slurry circuit is closed, the flow rate of additional process water does not exceed 10 m ³ / h, the water supply can be carried out by means of pumps from autonomous sources, and the power supply can be carried out by means of one or several diesel generators.

The invention is illustrated in the drawing, where the figures show:

FIG. 1 is a possible equipment connection diagram.

FIG. 2 - an embodiment of a modular processing plant in isometric projection, view 1.

FIG. 3 is an isometric view of an embodiment of a modular processing plant shown in FIG. 2, view 2 from another angle.

FIG. 4 is a qualitative and quantitative diagram of a modular concentration plant.

In the figures, the positions show:

1 - belt conveyor

2 - dry grading screen

3 - belt conveyor

4 - heavy-medium drum separator

5 - screen for dewatering and washing off magnetite suspension

6 - electromagnetic drum separator

7 - belt conveyor

8 - belt conveyor

9 - thickener

10 - belt filter press

11 - pumping unit

12 - pumping unit

13 - pumping unit

14 - pumping unit

15 - pumping unit

The invention is carried out as follows.

The pieces of equipment that make up the modular processing plant are delivered to the location and mounted on collapsible frames made of rolled metal beams, installed on a precast concrete slab foundation. The placement of the equipment modules can vary depending on the needs of the productivity and the location of the coal feed points, tailings and finished product. If necessary, the installation can be dismantled and reassembled at a new location, taking into account the production need.

The modular concentration plant works as follows:

Raw coal is fed by a belt conveyor 1 to a screen of dry classification 2 to obtain an oversize product and an undersize product fed to the screening warehouse by a belt conveyor 3.

The oversize product is fed for concentration by the heavy media method into a heavy medium drum separator (hydrocyclone) 4 with the separation of concentrate and waste.

The concentrate and waste after heavy medium concentration are fed to the screen for dewatering and washing off the magnetite suspension 5.

Structurally, the screen for dehydration and washing of magnetite suspension 5 is divided into sections, which prevents mixing of the finished product and rock on the screening surface. For efficient operation, the screen for dewatering and washing off the magnetite suspension 5 is equipped with shower and fan type sprayers.

After washing the magnetite suspension and dehydration on a screen 5, the concentrate and waste are fed to belt conveyors 7 and 8, which are transported to the finished product warehouses.

Conditioned magnetite suspension from the sump bath of conditional magnetite suspension of the screen 5 is pumped into the heavy-medium drum separator 4 to maintain the specified concentration density.

The substandard magnetite suspension from the sump bath of the substandard magnetite suspension of the screen 5 is pumped into the electromagnetic drum separator 6 to regenerate the magnetite suspension to obtain magnetite and sludge.

Magnetite is fed into a sump bath of conditioned magnetite suspension of screen 5.

Sludge after regeneration of magnetite suspension in an electromagnetic drum separator 6 with the addition of polymer flocculants is fed to thickener 9 for thickening with the release of clarified (recycled) water and a thickened product.

Clarified (circulating) water is supplied to the storm and fan spray of the screen for dehydration and washing of magnetite suspension 5. In this case, the consumption of additional water in the preferred embodiment of the invention does not exceed 10 m 1 h.

The thickened product of the thickener 9 is fed for dewatering to the belt filter press 10 with the separation of the filtrate fed to the thickener 9 and cake fed to the belt conveyor 8.

In the preferred embodiment of the present invention, the power supply is carried out by means of several diesel generators. "

The following table 1 shows the characteristics of the equipment of a modular concentration plant with a capacity of 100 t / h.

Specific load from equipment with a capacity of 100 t / h:

With S foundation = 216 m ² (18 m × 12 m) the load is 1.15 tf / m ²

With S of the foundation = 144 m ² (12 m × 12 m), the load is 1.64 tf / m ²

Moreover, the installed capacity of such equipment is 450 kW; the calculated power is 390 kW; power consumption is 390 kW / h.

Table 2 shows the characteristics of the equipment of a modular enrichment plant with a capacity of 200 t / h.

Specific load from equipment with a capacity of 100 t / h:

With S foundation = 216 m ² (18 m × 12 m), the load is 1.37 tf / m ²

With S of the foundation = 144 m ² (12 m × 12 m), the load is 1.98 tf / m ²

Moreover, the installed capacity of such equipment is 510 kW; the estimated power is 440 kW; power consumption is 440 kW / h.

The following is a list of equipment that can be used in the technological process of a modular concentration plant, broken down by operations:

1. Preliminary classification. Applied equipment:

1.1. Hydraulic screen of fixed type (GGN);

1.2. Fixed conical screen (GNK);

1.3. Grizzly roar;

1.4. Roller screen;

1.5. Screw screen;

1.6. Screen type GBaG;

1.7. Vibrating screen with circular motion;

1.8. Rumble Liwell;

1.9. Rumble with elliptical motion;

1.10. Sieve type SF;

1.11. Screen type SS;

1.12. Screen type SkH;

1.13. Inertial roar of light type;

1.14. Inertial roar of heavy type;

1.15. Inertial, self-balanced, light type roar;

1.16. Inertial, self-balanced, heavy roar;

1.17. Rumble type "TaBor";

1.18. Screen type "Sopp-Weld";

1.19. Screen type "Banan".

2. Extraction of a useful component by the method of heavy media.

Applied equipment:

2.1. Heavy-medium drum separator WEMCO;

2.2. Heavy-medium drum separator SBS5;

2.3. Separator type DISAS;

2.4. Separator type SKV;

2.5. Separator type SKVP;

2.6. Separator heavy medium centrifugal-gravity (TsGTS);

2.7. Heavy medium separator "Teska";

2.8. Separator heavy medium trough type "McNally Lo-Flo";

2.9. Separator heavy medium trough type "McNally Trompa";

2.10. Separator heavy medium bath type "Ridley Skol";

2.11. Heavy-medium separator type "OOS"

2.12. Heavy-medium separator "Dryboy" type

2.13. Heavy medium separator "Norvolta"

2.14. Heavy medium separator, NCB Vorsil type;

2.15. Separator heavy medium type "DianaVayerpool";

2.16. Separator heavy medium type "Larcodems";

2.17. Separator heavy medium type "Tri-Flo";

2.18. The separator is heavy medium type "SeproCondor";

2.19. Heavy medium two-product hydrocyclones;

2.20. Heavy-medium three-product hydrocyclones.

3. Washing and dehydration of commercial products. Applied equipment:

3.1. Inertial roar of light type;

3.2. Inertial roar of heavy type;

3.3. Inertial, self-balanced, light type roar;

3.4. Inertial, self-balanced, heavy roar;

3.5. Screen type "Tabor";

3.6. Screen of the "Conn-Weld" type;

3.7. Sieve type SF;

3.8. Screen type SS;

3.9. Screen type SkH;

3.10. Vibrating screen with circular motion.

4. Regeneration of magnetite suspension. Applied equipment:

4.1. Electromagnetic drum separator:

1) with a direct-flow bath;

2) with a counterflow bath;

3) with a semi-counterflow bath;

4) with a semi-countercurrent circulation bath;

5) with a regeneration bath.

4.2. Drum magnetic separator:

1) with a direct-flow bath;

2) with a counterflow bath;

3) with a semi-counterflow bath;

4) with a semi-countercurrent circulation bath;

5) with a regeneration bath.

5. Thickening of coal sludge.

Applied equipment:

5.1. Cylinder-conical thickener;

5.2. Radial thickener;

5.3. Combined thickener;

5.4. Thin-layer thickener;

5.5. Plate thickener;

5.6. Thickening funnels;

5.7. High-pressure thickening funnels;

5.8. Thickeners type "E-cat".

6. Dewatering of coal sludge.

Applied equipment:

6.1. Vertical filtering screw centrifuges;

6.2. Horizontal filtering screw centrifuges;

6.3. Vibration-filtering centrifuges;

6.4. Vibrating centrifuges;

6.5. Centrifuges of the H-900 type;

6.6. Two-stage pulsating centrifuges, SHS type;

6.7. Collecting and filtering centrifuges;

6.8. Collecting centrifuges;

6.9. Disc vacuum filters;

6.10. Disc vacuum filters with ceramic elements;

6.11. Belt filter presses;

6.12. Vacuum belt filter;

6.13. Chamber filter press;

6.14. Chamber-membrane filter press;

6.15. Concentration tables.

7. Accessory equipment.

Transport equipment:

7.1. Elevators;

7.2. Stationary scraper conveyors;

7.3. Belt conveyors;

7.4. Rope conveyors;

7.5. Plate conveyors;

7.6. Spiral conveyors;

8. Pumping equipment:

8.1. Coal pumps;

8.2. Centrifugal pumps;

8.3. Suspension pumps;

8.4. Vacuum pumps;

8.5. Pumps are pulp.

Table 3 shows the explication of the equipment shown in the figures with performance data.

The need for building materials of the proposed invention:

Metal - from 20 tons Reinforced concrete - from 60 m Crushed stone - from 400 m ³

The project for the creation of the proposed invention provides for three control modes:

1. Automatic - basic.

2. Remote - auxiliary.

3. Local - commissioning.

The proposed modular concentration plant has the following advantages.

Its functioning does not require a pile foundation or a foundation in the form of a monolithic concrete slab; the equipment that makes up the modular concentrating plant has optimal mass-dimensional characteristics, allowing to compactly place the necessary equipment on the base of the precast reinforced concrete slab, excluding the overload of the foundation. Installation of the unit assumes no or minimal amount of construction work. All this allows you to diversify the options for layout solutions and minimize the commissioning time.

The proposed version of the foundation avoids subsidence and displacement, and is not affected by groundwater. This makes it possible to build the plant on problem soils.

The closed water-sludge scheme adopted in the technology of the proposed modular enrichment plant ensures the minimization of the amount of required additional water in the enrichment process. With the minimization of consumption, water supply can be carried out both from the water supply network of the mining enterprise, and through autonomous pumps from wells (natural sources).

Simplicity, reliability and high maintainability of the equipment used, coupled with a high degree of automation of the technological process of coal preparation, reduces the number of maintenance personnel.

The production of semi-dry waste (cake), carried out by means of filter presses, reduces the negative impact on the environment. The invention provides ecological cleanliness in the processing of coal due to the use of reagent-free enrichment processes and storage of tailings in a dehydrated state.

Due to the low power consumption of the equipment used, the power supply of the installation can be carried out both by means of power grids and by means of autonomous diesel generators.

Depending on certain conditions (specific features of the field, development, infrastructure and site for the installation), the commissioning period is from one to three months.

These advantages ensure stable autonomous operation of a modular enrichment plant for enrichment of coal deposits, including those located in remote and hard-to-reach areas.

The proposed invention has high technological performance and can dramatically reduce capital and operating costs for enrichment. Design and layout solutions and equipment used in the proposed invention allow meeting modern environmental and energy saving requirements. The invention makes it possible to ensure the profitability of the development of small coal deposits, which can be located in hard-to-reach and remote places from the infrastructure.

Claims (1)

Modular enrichment plant, including equipment for coal enrichment, connected into a single technological scheme, at least part of which is mounted on collapsible frames and installed on a base-foundation, characterized in that the collapsible frames are made of rolled metal beams, a prefabricated base is used as a foundation reinforced concrete slab, the equipment includes a dry grading screen, a heavy-medium drum separator, a screen for dewatering and slurry washing, an electromagnetic drum separator, a thickener, a belt filter press, belt conveyors and pumping units, the water-slurry circuit is closed, the consumption of additional process water does not exceed 10 m ³ / h, water supply can be carried out by means of pumps from autonomous sources, and power supply can be carried out by means of one or several diesel generators.

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