RU2019713C1 - Method for hydraulic fill (storing) and device for its realization - Google Patents

Abstract

FIELD: mining. SUBSTANCE: method includes preliminary thinning of flowing tailings, discharge of them into accumulator introduction of working agents into sands, sands conveyance through pipeline and hydraulic formation of fill mass. Sands are thinned in accumulator up to weight concentration of 0.7- 0.75, unloaded and piped using overflow water formed in tailings thinning in accumulator. Tailings are discharged into accumulator under level of overflow water and intensity of discharge of tailings into accumulator and discharge of sands from accumulator is similar. Besides, introduced into sands on discharge end of pipeline is binder as working reagent in form of aerated jet. Used as working reagents introduced into sand on pipeline discharge end are flocculant and binder, the latter is sprayed into flocculated sands. Method is realized in device containing accumulator with cone bottom and discharge unit with water line and nozzles. Besides, it has pipeline (including descending and horizontal sections) communicated with accumulator, cyclone with tailings line and discharge pipes, outlet and sump for overflow water. Cyclone discharge pipes are communicated with accumulator, and outlet, with pipeline. There are also conical screen, outlets and collector with side and central nozzles. Collector is installed in accumulator bottom with side nozzles spaced over bottom periphery 0.5-1 m from one another, and central nozzle installed at distance of (1.25-1.75)D from outlet end, where D is outlet diameter. Conical air-tight vessel with volume equalling 1.5-2.5% of accumulator volume with inlet for tangential supply of sands, is installed before descending section of pipeline. EFFECT: higher efficiency. 8 cl, 1 dwg

Description

 The invention relates to mining, mainly to the technology and mechanization of mining and laying operations, and can be used in various mining industries - mining transport and beneficiation.

 A known method of hydraulic bookmarking (rock washing), including the preparation of solid material in the form of crushed rock mass or slurry, its accumulation, subsequent hydrotransport through a pipeline and washing into an artificial massif.

 A device for implementing this method is also known, including a single-chamber or two-chamber hydraulic hopper-feeder of large capacity, a transport pipeline and a pressure water supply regulator [1].

 The disadvantages of this method and device are: increased consumption of water, energy and equipment wear; hydrotransportation and washing up of the material at relatively low concentrations causes high costs for water drainage; high cement consumption is required; the filling complex for this proposal is cumbersome and low-tech.

 There is also known a method of hydraulic laying, including the preparation of filling materials, thickening the current tailings, unloading them into a storage tank, introducing working reagents into the sands, transporting them through the pipeline and washing the filling array.

 There is also known a device for implementing this method, including a drive with a conical bottom and a discharge unit with a water conduit and nozzles, a pipeline consisting of downward and horizontal sections in communication with the drive [2].

 The disadvantages of this method and device are low concentrations of the filling mixture and a large flow of water for drainage.

 The purpose of the invention is to increase the efficiency of the bookmark by increasing the concentration of the filling mixture and reduce the cost of drainage of water.

 This goal is achieved by the fact that in the known method of hydraulic laying (storage), including pre-thickening the current tailings, unloading them into the accumulator, introducing working reagents into the sands, transporting them through the pipeline and washing the filling array (storage), the sands are condensed to the weight concentration of 0.7 - 0.75, unload and transport them through the pipeline, using the drain of water formed by the thickening of the tailings in the drive.

 At the same time, the tailings are unloaded into the drive under the discharge water level and the intensity of tailings unloading into the drive and the sands from it are maintained the same.

 In addition, a binder in the form of an aerated jet is introduced into the sands as working reagents.

 At the same time, when using unclassified sands as working reagents, a flocculant and an astringent are introduced into the sands at the discharge end of the pipeline, the latter is sprayed into flocculation sands.

 This goal is also achieved by the fact that the known device for hydraulic laying (storage), containing a drive with a conical bottom and a discharge unit with a water conduit and nozzles, a pipeline consisting of downward and horizontal sections in communication with the drive, is equipped with a cyclone with a tail conduit and drain pipes, an outlet pipe and a sump for drain water, while the cyclone drain pipes are in communication with the drive, the outlet pipe with a pipeline, and the sump with a water conduit.

 The device is equipped with a conical screen, an outlet pipe and a collector with side and central nozzles, while the collector is installed in the bottom of the drive with the lateral nozzles of the collector located on the periphery of the bottom at a distance of 0.5 - 1 m from each other, and a central nozzle installed at a distance ( 1.25 - 1.75) D from the end of the outlet pipe, where D is the diameter of the outlet pipe.

 In addition, the device is equipped with a conical tight container with a volume of 1.5 - 2.5% of the volume of the drive with a pipe for tangential supply of sand, while the tank is installed in front of the descending section of the pipeline.

PRI me R. The laying process is carried out using collective tails previously dehydrated on the devices of the processing plant. In this case, the tails are directed from the flotation machines to the common sump, and then (see drawing) along the pipe 1 to cyclones 2. The tails are concentrated to a concentration of 0.45 - 0.5 by weight, and the discharge from cyclones in the presence of thin classes is directed into the prefabricated sludge collector of the processing plant. Through the drain pipes 3, the hydraulic mixture fills the reservoir with the solid phase and clarified water to a level sufficient to create a hydrostatic column of the hydraulic mixture in the discharge node of the hopper-feeder 4. Here, the tails are condensed to a concentration of 0.8 - 0.83 under their own weight (considering their density 3 , 0 g / cm ³ and more). Water with the thinnest particles with a content of up to 3-5% by weight is poured into the drainage conduit 5 and collected in the sump 13. Water jets to discharge the reservoir are supplied from the collector 10 through the pipe 11 by a high pressure pump 12 connected to the receiving sump 13 of the drainage water. As the thinnest sludge accumulates in the sump, they are fed by a slurry pump through line 14 to the common drain line of cyclones 16 or pumped into the accumulator. The discharge of water separated in the drive enters through the drainage windows 15, into which, if necessary, the simplest filters can be inserted. The backfill hydraulic mixture is directed from the accumulator to the hermetic container 17 to smooth out the pulsations of the concentration of the mixture, and from it to the downward backfill pipe 18 to the treatment workings. Before unloading the mixture in the worked-out space at the end of the pipeline, a flocculant is injected into the mixture, which provides the required filtration rates when using unclassified tails. When creating a hardening massif, an aerated stream of binder is introduced into the pipeline of the sandy mixture under pressure at a pressure of 15 - 20% greater than the pressure in the filling pipeline. The flocculated stream of water-sludge mixture is "covered" with a spray fan of binder introduced into the pipeline.

 The device shown in the drawing.

 The device for hydraulic laying includes a supply pipe 1, cyclones 2, drain pipes 3, a reservoir 4, equipped with drainage pipes 5, a transport pipe 6 with a vertical pipe 7, nozzles 8, a screen 9 and a collector 10. A water pipe 11 from the pump 12 is connected to the collector 10 with a sump 13 having a discharge sludge 14, drainage windows 15, sludge 16 (main), the transport pipe 6 ends with a conical tank - density averager 17 and a mine pipeline 18.

 The device operates as follows.

 Current tails flow through pipe 1, usually with a weight concentration of slurry of about 0.3 - 0.35, into cyclone 2. The thickened mixture with a concentration of up to 0.45 - 0.5 by weight is sent through drain pipes 3 to accumulator 4. Here, the tails are concentrated under the action of its own weight is up to 0.8, and water with the thinnest classes containing 0.03 - 0.05 is discharged into the drainage conduit 5 and collected in the sump 13. After accumulating tails to the height from the bottom, the accumulator is unloaded through the transport pipeline 6 and the outlet ascending pipe 7 with screen 9 with water nozzles 8 - central and located on the periphery of the bottom of the drive. Water jets for unloading the drive are supplied from the collector 10 through a pipe 11 by a high-pressure pump 12 connected to a receiving sump 13 of drainage water. As the thinnest sludge accumulates in the sump, they are pumped through a pipe 14 to a common drain line 1 of cyclones 16 through a pipe 14 or pumped into the accumulator 4. The discharge of the water separated in the accumulator enters through the drainage windows 15. The filling hydraulic mixture is sent from the accumulator to the hermetic container 17 to smooth out the pulsations the concentration of the mixture, and from it into the descending filling line 18 to the treatment workings.

 The use of this invention allows to ensure the filling process without special dewatering of the tailings and sludge, to reduce the circulation of the drainage water flow in the mine and on its industrial site, to combine the tanks for collecting the tailings with the feed hoppers in the form of a single high-capacity drive, to achieve hydraulic modes of operation with high concentrations within the possibility of a pressure-gravity system with a uniform and continuous supply of material to the filling array or underground storage.

Claims (7)

 1. The method of the hydraulic bookmark (storage), including pre-thickening the current tailings, unloading them into the accumulator, introducing working reagents into the sands, transporting them through the pipeline and washing the filling array (storage), characterized in that, for the purpose of laying efficiency by increasing the concentration of the filling mixture and reduce the cost of water drainage, in the drive the sands are thickened to a weight concentration of 0.7 - 0.75, they are unloaded and transported through the pipeline using a water discharge formed when the tailings are condensed in the tank the body.  2. The method according to claim 1, characterized in that the unloading of the tailings into the accumulator is carried out under the drain water level and the intensity of unloading of the tailings into the accumulator and the sands from it are the same.  3. The method according to claims 1 and 2, characterized in that, as working reagents, a binder is introduced into the sands at the discharge end of the pipeline in the form of an aerated jet.  4. The method according to PP. 1 and 2, characterized in that when using unclassified sands as working reagents, a flocculant and a binder are introduced into the sands at the discharge end of the pipeline, the latter being sprayed into flocculated sands.  5. A device for a hydraulic bookmark (storage), containing a drive with a conical bottom and a discharge unit with a water conduit and nozzles, a pipeline consisting of downward and horizontal sections communicated with the drive, characterized in that, in order to increase the efficiency of the bookmark by increasing the concentration filling mixture and reducing the cost of water drainage, it is equipped with a cyclone with a tail conduit and drain pipes, an outlet pipe and a sump for drain water, while the cyclone drain pipes are in communication with the drive, output a nipple - with a pipeline, and a sump - with a water pipe.  6. The device according to p. 5, characterized in that it is equipped with a conical screen of the outlet pipe and a collector with side and central nozzles, while the collector is installed in the bottom of the drive with the lateral nozzles of the collector at the periphery of the bottom at a distance of 0.5 - 1 m one from the other, and the central nozzle installed at a distance of (1.25 - 1.75) D from the end of the outlet pipe, where D is the diameter of the outlet pipe.  7. The device according to PP.5 and 6, characterized in that it is equipped with a conical sealed container with a volume of 1.5 - 2.5% of the volume of the drive with a pipe for tangential supply of sand, while the tank is installed in front of the descending section of the pipeline.

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