SU1542620A1 - Method of processing coal - Google Patents

Abstract

The invention relates to the mining industry and can be applied in the processing and use of coal mined in mining enterprises. The goal is to reduce coal losses and reduce processing costs. To this end, after the delivery of coal coal and coal-containing mine waters, varietal products and sludge are extracted from the coal coal to the surface. The coal is crushed and transported for incineration, and the sludges are mixed with carbon-containing water, averaged and subjected to the control classification to produce drains and sands. The sands are crushed, and the plums are thickened with the release of a condensed product and excess water with high-ash sludge. The latter is fed to alternately operating settling tanks located on dumps formed from waste rock. The ground sands of the control classification, together with the condensed product, are sent for incineration by means of hydrotransport. 1 il.

Description

The invention relates to the mining industry and can be applied in the processing and use of coal mined in mining enterprises.

The purpose of the invention is to reduce coal losses and reduce processing costs.

The drawing shows a diagram of the implementation of the method of processing coal.

The method of coal processing includes discharging solid coal and coal-containing mine water to the surface, separating high-grade products and sludge from solid coal, grinding, transporting coal to pulverized or slurry-like combustion, while the slimes are mixed with coal-containing mine water and hydraulic transport fed to district for the group of mines complex of preparation with a spray for the main hydrofoil line and cleaning of mine water (РКСО), on which the received mixture from suspended matter containing mine water and sludge on rule for averaging in the averaging basin on the RCSS,

(a) to the control classification with obtaining plum and sand, the sands are directed to ground rock, and the discharge to the condensation and separation of excess water, together with high-ash sludge. At the same time, the ground product is combined with the condensed product and transferred to the container of the finished highly concentrated suspension for the main hydraulic line, and the excess water with high ash sludge is sent to alternately active decanters. The latter are located on alternately operating dumps, which are formed from that rock delivered from the mining enterprises on the spent mine and quarry fields or agricultural inconvenience. Through the last filter, a large part of the excess water with high-ash sludge is used, and a smaller part of it is settled and discharged into open water through the sewage treatment plant.

The drawing shows a series of chgol 1 from a mine, a bunker 2, a feeder 3, a groove 4 GO OE 1C

although 4, high-quality coal 5, conveyor 6, warehouse 7 of high-grade coal, desliming 8, warehouse 9 desliming fine coal, sludge 10, sump 11, suspended mine water 12, slurry 13 from sludge and mine water, pump 14 of the separate mine slurry (section ), averaging pool 15 slurry for a group of mines (cuts), a slurry 16 from other (not shown) mines (cuts), a pump 17 for feeding a slurry from an averaging pool, control hydraulic classification 18, drain 19 control hydroclassification, primary thickening 20, condensed coarse grading ykt (sand) 21 of the control classification, mill 22, secondary thickening 23, primary condensation drain 24, additional clarification bypass 25, active clarifier 26, additional water clarification 27 (removal of micron fractions of the breed condensed secondary condensation product 28 (suspension semi-finished product), capacity 29 the semi-finished product of the final suspension for the hydrographic pipeline, the secondary condensation drain 30, the additional water clarification condensed product 31, the additional clarification drain 32 and its bypass 25 (excess water with high ash sludge), "filling Sludge tank 33, water drainage 34 through waste dumps, water evaporation 35, water 36 for treatment, water treatment plant 37, discharge 38 of excess water into open water courses (reservoirs), pump 39 for supplying clarified purified water to process needs, for example, a mill , transport communication 40 for the additional supply of desliming coal for the hydraulic coal pipeline, additional conditioning of the suspension 41 by density, viscosity, additives, the main pump 42 of the hydraulic coal pipeline.

Coal 1, discharged from the mine (cut) by conventional transport, enters the hopper 2, from which the feeder 3 is fed to screen 4. The oversize screen product with one or several sieves is coal 5, transported by one or several conveyors 6 to an open a warehouse (warehouses by grades) 7, from where it is delivered by transport to consumers.

The undersize product 4 enters the sludge disinfection unit 8, which is either an air separator or a "fluidized bed" unit, or a hydro-classifier, a sieve of wet sifting, etc.

Desalted coal enters the warehouse 9 of shallow desalted coal, possibly as closed as a silo or other type, from where it is transported by known means with liquid film coating of cars to protect it from weathering, which burns it in pulverized form, which is spent on grinding

less energy and releasing coarse coal fractions for more needy consumers, which they previously used for inefficient grinding.

The sludge 10 is sent to the sump And, which also receives the mine suspended water 12. Hydraulic mixture 13 (not yet suspended) variable saturation of TverP smoke (coal) depending on the variable value of the mine inflow and folding coal objectively on the shift time and day of work mine from the sump And the pump 14 is pumped into the averaging pool 15 of the complex for preparing the main hydraulic coal pipeline, storing waste rock and cleaning the mine water (15-40), which also receives the slurry 16 from other mountain Tille and coal district.

From the averaging basin 15, the slurry is pumped by pump 17 to the control hydraulic classification 18, for example, in a sloped hydro cyclone. When this occurs, the slurry is divided into two products: coal particles with water that do not require further grinding5, hydrocyclone discharge 19, which are fed to the primary concentration 20, for example, in a vertical hydrocyclone, and coal particles (sands) 21 that need to be crushed with a minimum amount of water enter the mill 22.

The condensed product of the primary condensation 20 enters the secondary condensation 23, for example in a radial thickener, and the primary condensation discharge 24 enters depending on the degree of strength and softening of the bare rocks enclosing the coal seams dump rock, or additional clarification 27 of water, for example in a thin layer clarifier.

With non-washable rock, in thin grades, coal and rock are 50% each and do not differ in size. Therefore, there is no need to separate them, since simple and cheap methods are unacceptable for

5 of this. When the rock is soaked in coal, the slurry is much larger than the rock, and with the available machines they can be easily and cheaply separated.

The thickened product of the secondary thickening 28 flows directly into the tank 29 of the semi-finished product of the finished slurry for the hydraulic coal pipeline. The secondary condensation discharge 30 is supplied depending on the same reasons as the primary concentration condensate discharge 20, or directly by-passing 25 into the sump.

5 26, or through additional clarification 27 (removal of micron fractions of the rock). Condensed product 31 clarification 27 of water enters the tank 29 of the prefabricated suspension. Drain 32 clarifications

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27 and its bypass 25 always enters the existing clarifier 26, since it contains mainly micron fractions of waste rock.

In addition to the existing settling tank 26, there is a bed of settling tank 33, into which empty rock is removed from the mines and processing plants and stored in a layer of a certain thickness. After the completion of the next layer of dumping, a dam with a clay lock is built around the settling tank and the drain 32 is switched to it. The previously operated settling basin 26 becomes "slept off, and" the pouring off settling tank 33 becomes operational.

From the existing sedimentation tank 26, part of the water with high-ash sludge is drained, clogging the pores in the waste rock and creating prerequisites for its agricultural use, part of the water 35 evaporates and only part of the water 36 enters the treatment plant 37.

A part of the treated water is discharged into open watercourses (reservoirs) 38, a part is used in technology, for example in mill 22 through pump 39, when the sludge taken from solid coal is not sufficient for the functioning of the coal pipeline and it is necessary to use fine, calcified, for additional grinding

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five

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coal 9, delivered it by an ordinary conveyor 40.

The semi-finished product of the finished suspension from tank 29 is supplied, if necessary, to additional conditioning -11, for example, in terms of density, viscosity, inhibitor additives, etc., and then enters the head pump of the hydraulic coal pipe 42.

Claims (1)

Invention Formula A method for processing coal, including discharging solid coal and coal-containing mine water to the surface, separating high-grade products and sludge from coal, grinding, transporting coal for combustion, characterized in that, in order to reduce coal losses and reduce the cost of processing The sludge is mixed with carbon-containing mine water, averaged and subjected to a control classification to produce plum and sand, while the sand is crushed, and the drain is thickened with the release of a condensed product and excess water with high ash sludge, Lednov fed alternately acting on sumps located on the piles formed from the gangue, wherein for combustion fed regrinding sand control classification together with the condensed product and the transportation is carried out hydraulically. Mjf / g - /.///ts z 34 z 34