Method to carry-over coal for dispatch on coal strip mines and conveyor for its realisation

FIELD: mining.

SUBSTANCE: method includes feeding coal along the main external chain scraper conveyor from a receiving hopper to rolling stock, providing for automatic separation of coal into fractions in process of coal feeding, for instance, into three fractions, siftings - up to 15 mm, bean - up to 35 mm and coarse coal, with preliminary crushing and dosed discharge of coal. At the same time automatic separation of coal into fractions is carried out as coal moves along the main external chain scraper conveyor, for instance, to a half of conveyor length - to the siftings fraction, and on the other half - to the bean fraction, at the same time discharge and carry-over of fractional coal is carried out automatically by a lower idle branch of the main chain scraper conveyor with siftings fraction discharge into a tray of one belt conveyor, the bean fraction - into a tray of another belt conveyor, and coarse coal is carried over by the upper branch of the main external chain scraper conveyor directly to the rolling stock, besides, coal separation into siftings and bean fractions is carried out by sectors.

EFFECT: simplified design and improvement of efficiency.

2 cl, 2 dwg

 

The invention relates to the coal industry, the technique of separation and separation of materials by size.

Known method of separation of bulk materials and device for its implementation (EN 2136399 from 21.05.1998 year). The method includes the supply of the source material on the upper reach of the endless moving belt and collecting products division. From all the source material highlight the part of and serve it on the lower reach of an endless belt.

The device includes an inclined installed on drums endless moving belt, the hopper, drive and receivers separation products, installed between the upper and lower branches of the main endless bands for more endless belts and additional receivers separation products. The device is equipped with additional hopper with feed pipes. The feed pipes of the main feed hopper located above the upper branches of the endless belts and the feed pipes additional feed hopper located above the lower branches of the endless belts.

However, this separation method and device for its implementation not applicable for the separation of coal into fractions.

Known method of separation of bulk materials avts of the USSR №1717268, CL VV 13/10 from 20.06.1988, the Method includes the supply of material to the top of the working surface, separation of the mother is La via vibration exposure and withdrawal of separated fractions at the base of the working surface by means of partition walls, with a gap covering the base of the working surface, which is done in the form of a paraboloid of revolution. Vibration impact is realized by means of a circular horizontal oscillatory movements.

The disadvantage of this method of separation of material (coal) into fractions is low performance.

A device for sorting rock mass (awts of the USSR №1623792, CL VV 1/12 from 06.02.1989 year). The device includes drums, sorting the canvas in the form of an endless traction elements mounted with the possibility of rounding drums, shafts located below the upper branches of the endless traction elements, perpendicular to them, mounted on shafts offset relative to each other Cams with grooves on their working surfaces, which are some of the endless traction elements. The ends of adjacent Cams on each shaft are placed in the same plane and are made with chamfers. Other endless traction elements are installed through one with the possibility of contact with the end planes of the adjacent Cams, to improve the quality of sorting rock mass through the creation of additional vibrations of the traction elements in the horizontal plane.

The disadvantages of the known devices are low performance and design complexity.

The problem solved by the invention, the side which is to simplify the design, method of separation during shipment and to increase productivity.

The technical result achieved by the invention is to provide a method and a conveyor for removal of the coal for shipment simple design and high performance.

This technical result is achieved by the fact that the automatic separation of coal into fractions is carried out with the movement of coal through the main bypass the chain scraper conveyor length conveyor at a fraction of the screenings, and the other half on the fraction of the nut. While the collection and removal of fraction of coal is carried out automatically lower the idle branch main extension chain scraper conveyor with the issuance of a fraction of fines in the tray one belt conveyor, faction nut in the tray of another belt conveyor. Lump charcoal is made by the upper branch of the main extension chain scraper conveyor directly on the rolling stock. The division of coal into fractions screenings and a nut carried sectors.

The pipeline for implementing the method of removal of coal for shipment in coal mines includes a hopper with feeder, belt conveyors and main extension chain scraper conveyor, approved for the upper branch of which is made with many through holes up to half of the length of the s with wide holes for the fraction of coal screenings 15 mm, in the second half with holes wide under the fraction of coal nut - 35 mm Lower lodgement of this conveyor is made whole, but with Windows for sifting through them in foster trays of the conveyor bottom no-branch, respectively, each fraction of the coal. Belt conveyors are perpendicular to the main extension of the chain scraper conveyor. Cradles of the two main branches of the extension conveyor is made of sheet metal of high wear resistance thickness, for example 10 mm Through holes in the bed to the top of the cargo branch main extension chain scraper conveyor posted by sectors, to maintain the total rigidity of the cradle. Holes are made extra long, for example up to 250 mm, and are arranged at an angle to the longitudinal axis of the conveyor, for example 45°, with the most complete removal of the corresponding fractions of coal during the removal of the weight of shipped coal.

1 schematically simplified shows a General view in plan of a conveyor for the removal of coal in coal mines; figure 2 - fragments in terms of lodgement under the fraction of coal 15 mm and the fraction of 35 mm

The conveyor consists of a receiving hopper 1 with dispenser-grabiteley 2 in the lower part of the hopper 1, the main extension of the chain scraper conveyor 3 and belt conveyor 4. Lodgement 5 top ve is wee basic remote conveyor 3 to half the length of the axis is made with a through hole 6 for fractions of coal 15 mm, and the other half with the hole 7 of the fraction of coal 35 mm

The method of removal of coal for shipment is carried out, and pipeline works as follows.

From the quarry raw materials-coal, heavy-duty trucks is moved to the hopper 1 and it poured. The statement includes the actuators of all of the conveyors 1 with dispenser-grabiteley 2 and 3, 4. Raw materials-coal, moving in bulk on the upper lodgement 5 by scrapers-traverse, with some vibration, the length of the conveyor 3 with the holes 6 in the lodgement 5, released almost completely from the fine fraction of coal fines up to 15 mm

This fraction is eliminated automatically, through holes 15 mm, and getting to the bottom of the lodgement of the conveyor 3, scrapers through the window in the lodgement to the lower branches of the main conveyor is poured into the tray extension belt conveyor 4 and is shipped or immediately in the car, or in a heap.

And on the site of lodgement with 5 holes fraction of coal nut to 35 mm also automatically coal this fraction falls to the bottom of the lodgement of the conveyor 3 and is poured through the window in the following output tray belt conveyor 4, which ships this coal on rolling stock or store in a heap.

The remaining lump charcoal made other conveyors 4 and loaded onto the rolling stock. Lumpy coal pureplays the population and industrial enterprises. The coal fraction to 35 mm nut and fractions up to 15 mm - screenings are used at the power plant for bed and pulverized combustion.

Example

The way and the pipeline was tested on the coal mine "Bolsheselskiy" Bolshetirskogo field on the territory Balahtinskoj district of the Krasnoyarsk region of the Russian Federation.

Attached are images of some of the main sections of the extension of the chain scraper conveyor 3:

1. Lodgement 5 with holes 6 for dropout rates of 15 mm.

2. Lodgement 5 with holes 7 for the nut 35 mm

3. Lodgement 5 in place of the end sectors with holes 6 and the beginning of sectors with holes 7.

The width of the main extension chain scraper conveyor is 800 mm, the Width of the holes in the bed under the fraction of coal fines is 15 mm, the fraction of coal nut - 35 mm Length of all holes 250 mm Are all through hole is inclined to the longitudinal axis of the extension conveyor at an angle of 45°. Inclined arrangement of the through holes contributes to a more complete spilling specified fractions of coal during the passage of the mass of raw coal in bulk on offshore conveyor entire length of its lodgement.

As a result, the performance for shipment of graded coal has increased significantly. Instead of 500 tons when using previously hammer mill do RM and rumble GSH-1000, after the introduction of the new method and the con is Aero performance reaches 1500 tons per shift.

1. The method of removal of coal for shipment in coal mines, including the supply of coal for the main extension of the chain scraper conveyor from the hopper on the vehicle, providing in the process of coal feeding automatic separation of coal into fractions, for example three, fines up to 15 mm, nut to 35 mm and lumpy coal, with preliminary crushing and dosed the issuance of coal, characterized in that the automatic separation of coal into fractions is carried out with the movement of coal through the main bypass the chain scraper conveyor, for example, to half the length of the conveyor at a fraction of the screenings, and the other half on the faction nut, while the reset and removal fraction of coal is carried out automatically lower the idle branch of the main chain scraper conveyor with the issuance of a fraction of fines in the tray one belt conveyor, faction nut in the tray of another belt conveyor and coarse coal is carried by the upper branch of the main extension chain scraper conveyor directly on the rolling stock, and the separation of coal into fractions screenings and a nut carried sectors.

2. The pipeline for implementing the method according to claim 1, including a hopper with feeder, belt conveyors and main extension chain scraper conveyor, approved for the top branches of which are made with many through holes up to half of the length along the longitudinal axis of the conveyor belt with a width of under fraction of coal screenings - 15 mm, and the second half - with holes wide under the fraction of coal nut - 35 mm, with the lower lodgement of this conveyor is made whole, but with Windows for sifting through them in foster trays of the conveyor belt with the lower branch, respectively, each fraction of the coal, and belt conveyors are perpendicular to the main extension of the chain scraper conveyor, and the cradle of both branches of the main extension chain scraper conveyor is made of sheet metal of high wear resistance thickness, for example, 10 mm, wherein the through hole in the bed for the upper branch of the main extension chain scraper conveyor is hosted sectors to save the total hardness of lodgement made extra long, for example, up to 250 mm and are arranged at an angle to the longitudinal axis of the conveyor, for example, 45°, with the most complete removal of the corresponding fractions of coal during the removal of the weight of shipped coal.



 

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