SU1738900A1 - Method of screen wash-up on accumulator skirting - Google Patents

Abstract

Use: mainly in the construction of ash dumps and tailings. The essence of the invention: at the bottom of the accumulator bowl pour a stop filtering prism from coarse-grained soil. A shielding prism of clay soil is poured right next to the board and the first layer of screen made of dispersed material is washed into the space between them. Water from the surface of the washable screen is removed by filtration through a stop prism. After completion of the first and each subsequent screen slots, the flow of pulp is directed to the central part of the accumulator. The surface of the washed rus is drained, the persistent and shielding prisms of the next rus are poured, and they are washed as before. At all stages of the construction of the screen provide the excess of its surface above the water level in the drive. 1 hp ff, 1 ill. AND

Description

The invention relates to hydraulic construction, in particular to methods for constructing alluvial accumulators, mainly ash dumps and tailings.

The aim of the invention is to increase the shielding efficiency of the steep filter sides of the alluvial drives by improving the screen washing technology.

The drawing shows the screened board and on the screen extension.

The drawing shows the screened bottom of the bowl of storage 1, the filtering resistant prism 2 of coarse grained soil, the screened board 3, the screening prism 4 of clay soil, the screen 5 washed up from dispersed material, slurry pipe 6,

layer 7 of the stored dispersed material, washed up in the central part of the accumulator, water level 8 in the accumulator.

The method is carried out as follows.

On the bottom of a storage bowl shielded by known methods, a filtering resistant prism 2 of coarse grained soil is poured out, located at a given distance from the screened side 3. Putting a screening prism 4 of clayey soil and in the space between the resistant and screening prisms 2 and 4 they wash the screen 5 of the dispersed material stored in the accumulator, feeding the pulp along the slurry pipeline 6 laid on the ridge of the stop prism 2. Water from the surface of the washable screen 5

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from the water into the central part of the accumulator by filtration through the stop prism 2. After the first tier of the screen 5 is washed out, the flow of pulp is directed to the central part of the accumulator, where the layer 7 is washed from the stored dispersed material. After the surface of the washed-up screen rusa 5 dries up, the thrust and shielding prisms 2 and 4 of the second screen screen rush 5 are washed out, then it is switched again to the slurry pipe 6 to supply the pulp to the central part of the reservoir, where the water level 7 continues At the same time, it should be ensured that at all stages of building up the screen 5 its surface is located above the water level 8. All subsequent lines of the screen 5 are built similarly. The dumping of resistant and shielding prisms 2 and 4 are mainly performed in winter, using a higher bearing capacity of the seasonally frozen layer on the surface of screen 5. In this case, filling the shielding prism 4 is from thawed, partially frozen or completely frozen lumpy clay soil, water-impermeable properties of which are enhanced by the subsequent closing of the voids between the clods during the washing of the screen 5.

The application of the invention allows the use of ravines, quarries and other deep workings with steep filtering sides for arranging compact alluvial accumulators in them, mainly ash dumps and tailing dumps, without carrying out spurious and expensive anti-filtration measures (injection fixation, surface welding and etc.). The device screen according to the proposed method is possible using a wide range of non-conditioned local clay and coarse grained soils and the dispersed materials stored in accumulators (for example, ash or tailings), with any relief, slope and permeability of the screened board. The ability to perform a certain part of the work in the winter time allows reducing the technological breaks between the separate stages of the screen construction.

Claims (2)

1. Method of washing the screen on the sides of a storage device, including shielding the bottom of the storage bowl, erecting a stop at the bottom of the board, feeding the pulp into the space located between the board and the support and forming a screen in it from the dispersed material stored in the storage unit, the effectiveness of shielding steep filter sides by improving the screen washing technology, on the bottom surface at a distance from the board equal to the length of the screen, an emphasis is erected in the form of a filtering prism from coarse A shielding prism of clay soil is poured into the bottom of the ground, along the crest of the persistent prism, a slurry pipeline is laid and in the space between the stop and shielding prisms the first screen of the dispersed material is washed out, water is filtered from the surface of the washed screen by a prism. Alluvium of the first and each subsequent screen rushes the pulp flow to the central part of the accumulator with a fixed spillway of clarified water placed in it, the surface of the rinsed drying, and backfilled resistant shielding prism following pv cs and its analogous namyvayut previous i4 e y m, the screen at all stages of erecting provide excess over its surface vo-level Up) in the drive. 2. A method according to claim 1, wherein that the dumping of the thrust and shielding prisms of the second and all subsequent screens of the screen lead mainly in winter to the frozen surface of the alluvial screen array, while thawing or partially frozen or completely frozen lumpy clay soils are used for dumping the shielding prism between the clocks during screen washing. J S / -, 26 7 / /  :. 3fwV::. ..; .. o -.у.  .,. f irLc-.i iL ffr f f (f f -, flf 4 fl A I K / ///