RU2349396C1 - Method to store run-off of industrial plants with various filtration properties - Google Patents

Abstract

FIELD: environment protection.

SUBSTANCE: invention relates to environment protection, in particular to the method to store run-off of industrial plants with various filtration properties. The method involves stratified aggradation, periodical construction of dikes from run-off with high filtration coefficient all around newly aggrading run-off. Slurry of hydraulic fill is prepared directly on a dump, the dump is sluiced by section with dividing embankment, flood dikes are constructed from run-off with high filtration coefficient by aggrading on one lot, additionally the size of constructed dikes is bigger that is necessary for construction of flood dikes, the dump is sluiced by mixture of run-off with high and low coefficient of filtration on the other lot and dividing embankments are raised. The dump is sluiced and flood dikes are constructed by turn as the lots are filled with mixture, till the dump is raised to required altitude.

EFFECT: method allows decreasing square of sludge depository, as well as storing tails having various filtration properties and appearing during enrichment.

3 cl, 1 dwg

Description

The invention relates to the mining industry and can be used when disposing of waste from industrial enterprises with different filtration properties, for example, with different filtration coefficients.

There is a method of storing waste potash production, which consists in dumping the dam from halite waste around the entire perimeter of the spent sludge storage facility having an earth dam, with the formation of a tank for its subsequent filling, while dumping the dam from halite waste is carried out on the beach area of the spent sludge dumping site with the formation of a space between the soil a waste sludge storage dam and a halite waste dam for collecting and discharging excess brines, and filling the resulting tank is carried out tvlyayut using hydrotransport halite mixture of the waste and clay-salt slurries (Pat BY №4220, MKI 41/00 E21S, E21S 41/20;. appl 28.10.1998, published 30.12.2001..).

However, this method does not allow for continuous storage of waste with different properties, since at first dams of one material are constructed, and then they are jointly stored. This forces the construction of sludge storages to accommodate sludge for the period of dumping dams.

The closest in technical essence and the achieved result to the proposed technical solution is a method of storage of industrial waste, including dumping of dams of deboning from coarse-grained material, washing with tiers in the formed space of fine-grained material and water drainage from the main dump, after washing the first tier of the dump from fine-grained material pouring coarse-grained material on the external slope of the dam to its entire height along the entire perimeter of the blade, and then produce about a mixture with alternating layers of fine, coarse-grained material, starting with fine-grained and ending with coarse-grained, with the formation of a thrust element, on which another burial dam is dumped, after which fine-grained material is again washed over the entire height of the external slope of the next constructed dam, while the width of the thrust element perform at least the width of the subsequent tier of the stackable dam at its base (US Pat. RF No. 2026122, MKI B09B 1/00, EB02 7/00, declared 07/15/1991, publ. 01/09/1995, bull. No. 27).

However, in this method it is also impossible to carry out continuous waste storage, although shorter time intervals between the formation of the layers are provided.

The technical result of the invention is that it allows you to simultaneously store waste generated in the process of enrichment with different filtration properties, as well as to reduce the area of sludge storages.

The specified technical result is achieved by the fact that in the method of storing waste from industrial enterprises with different filtration properties, including layer-by-layer reclamation, periodic construction of dams from waste with a large filtration coefficient around the entire perimeter on newly washed waste, the hydraulic slurry is prepared directly on the dump, the dump is washed in sections with with dividing shafts, in one area in bulk, they construct waste dams from waste with a high filtration coefficient, and the dams are erected in volume, more shem required for erection embankment dams, and to produce another portion alluvium dump waste with a mixture of large and small coefficient of filtration and separation shafts erected and reclamation alternation blade and the formation of the embankment dams produce fill at least parts of the mixture before the erection of the blade to a predetermined height.

To form a pulp of hydraulic washing, waste with a low filtration coefficient is delivered to the dump in the form of a pulp of low concentration, and waste with a large filtration coefficient is delivered to the dump by conveyor.

The essence of the invention is illustrated in the drawing, which shows the layout of the waste: 1 - dump; 2 - conveyor line; 3 - dividing shafts; 4 - pickle pan; 5 - bulldozer; 6 - contour shaft.

An example of the implementation of the method is given for the conditions of tailing potash enterprises.

In the enrichment process, saline waste is generated, similar to fine sands with a high filtration coefficient (8-12 m / day), and waste with a low filtration coefficient (0.1 m / day), which are condensed sludges. Placement of this waste in the dump is as follows.

Saline waste to the landfill 1 is delivered by a conveyor line 2, which is separated on the dump, forming two or more points of discharge (dumping) of waste, which are the points of the litter and determine the boundaries of the landed area. The alluvium sections are separated by dividing shafts 3.

To carry out hydraulic washing, either brines or sludge pulp is supplied to the dump site to the dump site, and the hydraulic slurry is prepared directly at the dump. To prepare slurry pulp, thickened sludge from the thickener is mixed with brine from the picker 4 of the salt dump.

In one of the sections, the alluvial lead when sludge pulp is fed to the salt dump, and in the second, when brine is fed to the salt dump. When washing with brine, an array with a high filtration coefficient is formed. A contour shaft 6 is formed from this array using a bulldozer 5. The dimensions of the contour shaft are determined by calculation from the condition of ensuring the stability of the slope of the salt dump. The volume of the array, washed with a brine, should be greater than the volume of the erected section of the contour shaft 6, which will provide the conditions for the formation of the shaft only from salt waste without impurities of sludge.

After the construction of the contour shaft 6 along the entire length of the section and the separation shaft 3 on it (section), the saline waste is washed up with the addition of thickened sludge supplied to the salt dump 1 in the form of a slurry pulp of low concentration. When reclaimed, a mixture of wastes with a large and low filtration coefficient is formed. To prepare this pulp, thickened sludge from the thickener is mixed with brine from the brine pan of the salt dump.

The washing of the area with the use of slurry pulp is stopped when the residual volume of the lining allowed by the height of the contour shaft is greater than the volume necessary for the construction of the contour shaft 6. The residual volume is washed with salt waste, i.e. alternate layers of alluvium by waste with large and low filtration coefficients. The washing is carried out before the construction of the salt dump to a predetermined (design) height.

The use of the invention allows to simultaneously store waste generated in the enrichment process with different filtration properties, as well as reduce the area of sludge storages.

Claims (3)

1. A method of storing waste from industrial enterprises with different filtration properties, including layer-by-layer reclamation, periodic construction of dams from waste with a large filtration coefficient around the entire perimeter on newly washed waste, characterized in that the hydraulic slurry is prepared directly on the dump, the dump is washed with sections with dividing shafts , at one site in bulk they construct dams of waste from the bunker with a high filtration coefficient, and the dams are erected in an amount greater than necessary for the construction embankment dams, and to produce another portion alluvium dump waste with a mixture of large and small coefficient of filtration and separation erecting shaft, and alternation alluvium blade and formation embankment dams produce fill at least parts of the mixture before the erection of the blade to a predetermined height. 2. The method according to claim 1, characterized in that for the formation of pulp hydraulic washes waste with a low filtration coefficient is delivered to the dump in the form of pulp of low concentration. 3. The method according to claim 1, characterized in that the waste with a high filtration coefficient is delivered to the dump conveyor.