EA022235B1 - Method to carry-over coal for dispatch on coal strip mines and conveyor for its realization - Google Patents

Abstract

The invention relates to mining, to a separation and distribution technology by lump size. The essence of the invention is characterised in that the method of feeding coal along the main external chain scraper provides for automatic separation of coal into fractions in process of coal feeding from a receiving hopper to rolling stock. The coal is separated into three fractions: siftings - up to 15 mm, bean - up to 35 mm and coarse coal with preliminary crushing and dosed discharge of coal when the coal moves from a receiving hopper to rolling stock. A conveyor comprises a receiving hopper with a meter crusher, the main external chain scraper conveyor and several belt conveyors, positioned perpendicular to the main conveyor. A lodgement for the upper branch of the main external chain scraper conveyor is made with a plurality of through holes to a half of conveyor length along the conveyor longitudinal axis with hole width for 15 mm sifting fraction, and at the second half with holes for 35 mm bean fraction. A lodgement for the lower branch of the main external chain scraper conveyor is made as one piece with windows for spilling down the 15 and 35 mm fractions into receiving trays of belt conveyors. Through holes in the lodgement for the upper branch of the main external chain scraper conveyor are made at 45° to the longitudinal conveyor axis and elongated for example to 250 mm and positioned by sectors. The lodgements for both branches of the main external chain scraper conveyor are made from 10 mm thick sheet of metal of increased durability.

Description

(57) The invention relates to the coal industry, to the technique of separation and separation of materials by size. The essence of the invention lies in the fact that the method of removal of coal for shipment at coal mines provides for the automatic separation of coal into fractions during its supply from the hopper to a mobile vehicle. Separation is carried out in three fractions - screening up to 15 mm, nutlets up to 35 mm and lump coal. At the moment of receipt from the receiving hopper to the remote conveyor, the coal is crushed and dosed. The conveyor includes a receiving hopper with a batcher-crusher, a main external chain scraper conveyor and several belt conveyors installed perpendicular to the main one. The lodgement for the upper branch of the main remote conveyor is made with many through holes, up to half the length along the longitudinal axis of the conveyor with a hole width of 15 mm for the coal fraction, and in the second half with holes, 35 mm wide for the coal fraction of nuts. The lodgement for the lower branch of the main remote conveyor is made integral with windows for spilling coal of fractions of 15 and 35 mm into the receiving trays of the conveyor belts. The through holes in the lodgement for the upper branch of the remote conveyor are made at an angle of 45 ° to the longitudinal axis of this conveyor elongated, for example, up to 250 mm and are located in sectors. The lodgements for both branches of the main external chain scraper conveyor are made of sheet metal of increased wear resistance with a thickness of 10 mm.

022,235 Β1

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

A known method of separation of bulk materials and a device for its implementation (KI 2136399 from 05.21.1998). The method includes feeding the starting material to the upper branch of an endless moving belt and collecting separation products. A part is isolated from all the starting material and fed to the lower branch of the endless ribbon.

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

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

A known method of separation of bulk materials by ed. St. USSR No. 1717268 by class BB07 13/10 of 06/20/1988, the Method includes feeding the material to the top of the working surface, separating the material by vibration and outputting the separated fractions at the base of the working surface using a dividing wall with a gap covering the base of the working surface, which is made in the form of a paraboloid of revolution . Vibrational effect is carried out by means of circular horizontal oscillatory movements.

The disadvantage of this method of separating the material (coal) into fractions is low productivity.

A device for sorting rock mass (ed. St. USSR No. 1623792 class. B07B 1/12 from 06/02/1989). The device includes drums, a sorting cloth in the form of endless traction elements installed with the possibility of bending around the drums, shafts located under the upper branches of endless traction elements, perpendicular to it mounted on shafts with displacement relative to each other, cams with grooves on their working surface, in which one from 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 adjacent cams to improve the quality of sorting the rock mass by creating additional oscillations of the traction elements in the horizontal plane.

A disadvantage of the known device is the low productivity and design complexity.

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

The technical result achieved by the invention is to create a method and conveyor for the removal of coal for shipment of a simple structure and with high productivity.

The specified technical result is achieved by the fact that the method of coal removal for shipment at coal mines, including the supply of coal from the receiving hopper, provides for automatic separation of coal into fractions during the supply process. Separation is carried out, for example, into three fractions - screening up to 15 mm, nutlets up to 35 mm and lump coal. At the beginning of receipt from the receiving hopper, the coal is crushed and dispensed.

In a conveyor including a receiving hopper with a dispenser, a main remote chain scraper conveyor and, for example, three to four belt conveyors, a lodgement for the upper branch of the main remote chain scraper conveyor is made with many through holes, for example, up to half the length along the longitudinal axis of the conveyor with a width holes for coal fraction screening 15 mm, and in the second half - with holes with a width for coal fraction nuts 35 mm. The lower lodgement of this conveyor is made whole, only with windows for pouring through them into the receiving trays of the conveyor belts with the lower branch of the external chain scraper conveyor, respectively, of each coal fraction. All belt conveyors are preferably located perpendicular to the main external chain scraper conveyor. The through holes in the lodgement for the upper branch of the main external chain scraper conveyor are placed in sectors that are elongated, for example, up to 250 mm and are located at an angle, for example, 45 ° to the longitudinal axis of the conveyor to reliably spill the corresponding fraction of coal during the removal of the mass of coal being shipped. The lodgements of both branches of the main external chain scraper conveyor are made of sheet metal with increased wear resistance, for example, 10 mm thick.

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

The conveyor consists of a receiving hopper 1 with a batcher-crusher 2 in the lower part of the hopper 1, the main remote chain scraper conveyor 3 and belt conveyors 4. The bed 5 of the upper branch of the main remote conveyor 3 to the half of the axis length is made with through holes 6 for coal fraction 15 mm and the other half with through holes 7 coal fractions 35

- 1,022,235 mm.

The method of removal of coal for shipment is carried out, and the conveyor operates as follows.

From the quarry, raw coal is transported by heavy trucks to bunker 1 and poured into it. The operator includes the drive of all conveyors 1 with a batcher-crusher 2 and 3, 4. Raw coal, moving in bulk along the upper lodgement 5 due to traverse scrapers with some vibration over the length of the conveyor 3 with holes 6 in the lodgement 5, is almost completely freed from fine fraction of coal screening up to 15 mm.

This fraction is screened out automatically, through 15 mm openings, and, falling onto the lower lodgement of the conveyor 3, it is poured with scrapers through a window in the lodgement for the lower branch of the main conveyor into the tray of the external belt conveyor 4 and shipped either directly to the car or to the pile.

And in the section of the lodgement 5 with openings for a nut fraction of coal of up to 35 mm, the coal of this fraction also automatically falls onto the lower lodgement of the conveyor 3 and is also poured through the window into the next receiving tray of the conveyor belt 4, which unloads this coal on a rolling stock or stores it in a heap.

The remaining lumpy coal is carried out by other conveyor belts 4 and loaded onto the rolling stock. Lumpy coal is consumed by the population and industrial enterprises. Coal fractions up to 35 mm nuts and fractions up to 15 mm screening is used at state district power plants for layered and pulverized combustion.

Example.

The method and conveyor were tested on a coal mine of the Bolshesyrsky Bolshesyrsky deposit in the Balakhta district of the Krasnoyarsk Territory of the Russian Federation.

Attached are fragments of photographs (Fig. 3a-c) of some sections of the main external chain scraper conveyor 3:

1) tool tray 5 with holes 6 for screening 15 mm;

2) tool tray 5 with holes 7 for 35 mm nut;

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

The width of the main external chain scraper conveyor is 800 mm. The width of the holes in the lodgement for the coal fraction screening - 15 mm, for the coal fraction of nuts - 35 mm. The length of all holes is 250 mm. All through holes are located obliquely to the longitudinal axis of the remote conveyor at an angle of 45 °. The inclined location of the through holes contributes to a more complete spillage of the indicated fractions of coal during the passage of the mass of raw coal in bulk through an external conveyor of the entire length of the lodgement.

As a result, the productivity of shipped coal shipment has grown significantly. Instead of 500 tons when using the DU-1R69M hammer mill and the GSh-1000 screen earlier, after the introduction of the new method and conveyor, the productivity reaches 1500 tons per shift.

Claims (2)

CLAIM 1. Conveyor for automatic separation of coal into fractions, including a receiving bunker with a crusher dispenser, belt conveyors and the main remote chain scraper conveyor, the lodgment for the upper branch of which is made with a set of through holes up to half the length along the longitudinal axis of the conveyor with a width for the coal fraction screenings 15 mm, and in the second half - with holes of 35 mm wide for the coal fraction, and the lower lodgement of this conveyor is made whole, but with windows for spilling through them into the receiving trays of flax full-time conveyors of the lower branch, respectively, of each coal fraction, and the belt conveyors are perpendicular to the main remote chain scraper conveyor, while the cradles of both branches of the main remote chain scraper conveyor are made of sheet metal of increased wear resistance with a thickness of at least 10 mm, characterized in that the through holes in the lodgment for the upper branch of the main remote chain scraper conveyor is placed by sectors to preserve the overall rigidity of the lodge nta, are made elongated at least up to 250 mm and arranged at an angle of at least 45 ° to the longitudinal axis of the conveyor with the possibility of the most complete removal of the corresponding coal fraction during the removal of the mass of coal being unloaded 2. The method of removal of coal for shipment in coal mines using a conveyor according to claim 1, including the supply of coal through the main remote chain scraper conveyor from the receiving hopper to the rolling stock, which in the process of coal supply automatically separates coal into fractions, for example, into three, screening - up to 15 mm, nutlet - up to 35 mm and lump coal, with preliminary crushing and metered delivery of coal, characterized in that the automatic separation of coal into fractions occurs during the movement of coal through the main remote flail to the scraper conveyor, at least up to half of the conveyor length to the screening fraction, on the other half to the nutlet fraction, while the fractional coal is discharged and carried out automatically by the lower idle branch of the main chain scraper conveyor of the nutlet to the tray of another belt conveyor, and the lumpy coal is carried out by the upper branch of the main remote chain - 2 022235 scraper conveyor directly to the rolling stock, and the separation of coal into fractions of screenings and peat is carried out by sectors.