SU1813905A1 - Method of formation of tailing dumps and storage of concentration mill tails - Google Patents

Description

UNION OF SOVIET

SOCIALIST

REPUBLIC

USSR STATE OFFICE (USSR STATE PATENT) (19) SO (11)

1813905 AG <51) 5 E 02 D 17/18

PATENT;

DESCRIPTION OF THE INVENTION to the AUTO RSCOM IN AND DETAILS '? / 1' ^: · · · ι / '(21) 4811058/33 (22) 05.04.90 (46) 07.05.93. Bul. No. 17 (75) A.E. Vorobiev and T.V. Chekushina (56) Application of Great Britain No. 2162223, cl. F 02 D 3/12, 1986.

'Rakhimov V.V. and others. Some questions of geomechanics during the operation of tailings. Tashkent, FAN, 1978, p. eight.

(54) METHOD FOR FORMING TAILS AND STORAGE IN THEM TAILS OF CONCENTRATING FACTORIES; (57) Usage: mining processing. ... industry, waste storage. ¹ 'The essence of the invention: an anti-filtration coating is arranged along the entire perimeter of the tailing dump, tails containing metal sulfides with a variable content of the latter in each layer are laid on the bottom of the storage in layers, and tailings containing rare earth elements with their same variable content. Moreover, the layers with the sulfide content are separated by a bridge from the layers containing rare-earth / chalk elements. 1 ill.

• I '.

The purpose of the invention is to create the interaction of layers of tails and increase the efficiency of their storage as a result of the resulting differentiation of useful components contained in the tails.

... : This goal is achieved by the fact that when implementing the method of forming and: preserving the tailing dump, including the formation of an anti-filtration base, laying a drainage layer, creating water intake structures, layer-by-layer storage of tailings with their separation according to the mineral composition and content of the useful component, then an anti-filtration layer is formed - a screen, which is located on the drainage layer of sulphides with a low content of the useful component. after which a drainage layer and a layer of rocks, for example, alkaline, with a relatively high content of the useful component, are sequentially formed, separating them by a bridge of a layer of rocks, for example, sulphides, with a relatively high content of the useful component, on the surface of which a layer with a relatively high content is formed - · zhaniya useful component, for example, REE. Then layers with a low content of a useful component, for example, REE, are formed, the side surfaces are screened with an anti-filtration layer. Then a drainage layer and an anti-filter screen are formed.

: Delivery of tailings is carried out using a slurry pipeline, processing - from water sources.

The method is carried out as follows.

An anti-filtration layer 1 is formed in the prepared recess. Then, it is formed. drainage layer 2. After that, layer 3 of tailings is formed with a low content of useful component A, for example, sulphide

1813905 A1 Dov, on the surface of which an anti-filtration screen 4 is formed. Then a drainage layer 6 is formed, a layer of tailings 7 with a relatively high content of useful component A, for example alkaline, separating them by a bridge 5 from the layers 9 of tailings laid in series with a relatively high content of useful component A, and layers 10 of tailings with a relatively high content of useful component B, for example, REE. On the surface of layer 10, a layer 11 of tailings with a low content of the useful component B is formed, and on the surface of layer 7, a layer 8 of tailings with a relatively low content of the useful component A is formed. Moreover, the content equal to 0.8 conventional units is taken as a high content of the useful component. from the minimum industrial content, and for a low 0.2-0.4 conventional units. Then, an anti-filtration layer 12, a drainage layer 13 and an anti-filtration layer 14 are formed. It should be noted that selective storage is carried out so that an electric current is generated between the layers and layers 8 and 11 act as anodes in relation to layers 7 and 10, and layer 3 is a cathode to layers 7 and 9 /

The tailings are processed from the source 15 and 17, and the tailings are delivered using the slurry pipe 16.

During the storage period, the elements that make up the tailing dump dissolve, transfer and precipitate.

After the useful components of layer 8 have dissolved, passed and concentrated in layer 7, layer 8 is processed and the anti-filtration screen is blasted with the help of drilled blast holes.

Then the tailing dump is processed from sources 15 and 17. Layer 3 is the cathode in relation to layers 7 and 9. In this case, soluble metals under the influence of electromagnetic forces will move upward and precipitate in layers 7 and 9. In layer 9, hydrogen sulfide will be released, which when meeting with descending metalliferous solutions (formed when the useful components of layer 11 are dissolved) in layer 10 will cause the deposition of useful components within this layer. As a result, layers 7, 9 and 10 will be enriched with the useful component. Purified solutions are removed through layers 2, 6 and 13.

An example of a specific implementation of the proposed method is the storage and storage of sulfide-containing and REE-containing tailings of the OP.

Initially, the excavation is planned and covered with an anti-filtration layer 1, for example, a polyethylene film. Then a drainage layer 2 is formed, for example from crushed stone, with a thickness of 1 m. After that, layer 3 is formed from tailings with a predominance of, for example, fahlores with a copper content of 0.3 standard units, with a thickness of 8-10 m. On the surface of layer 3, an anti-filtration screen 4 is formed from clay, with a thickness of 0.5 m -1 m. Then a drainage layer 6 is formed, with a thickness of 0.5 m from crushed stone (copper silicates) and a layer 7 from tailings with a predominance of, for example, covellite with a copper content of 0.6 standard units, with a thickness of 2-3 m. At the same time, a bridge 5 is formed from clayey rocks and a layer of 9 tailings with a predominance of covellite with a copper content of 0.8 conventional units, a thickness of 2 m and a layer of 10 tailings containing REE in relatively high concentrations, 2 m thick. On the surface of layer 10, a layer of tailings 11 with a low REE content, 10-12 m thick, is formed, and on the surface of layer 7, a layer 8 with a low copper content (0.2 conventional units) is formed, from cuprous pyrites. The surfaces of layers 8 and 11 are covered with an anti-filtration layer 12, then a drainage layer 13 of crushed stone and an anti-filtration layer-screen 14 are formed.

When the tailings from the source 15 are processed, copper dissolves in layer 8, migration in the form of ions in layer 7, where precipitation occurs. This leaves the sulfur in place. After dissolution and transfer of copper, layer 8 is removed and stored separately for the subsequent development of sulfur. After layer 8 is removed, the screen 4 is destroyed and the tailings storage facility is processed from the source 15 and 17. In this case, layer 3 plays the role of the cathode. Copper migrates upward under the influence of electromagnetic forces, where it is deposited in layer 7 and

9. Moreover, in layer 9, hydrogen sulfide is released. The solutions also leach REE from layer 11. Metallic solutions migrate to layer 10. where, upon encountering hydrogen sulfide, REE precipitates. As a result, layers 7 and 9 are enriched with copper, and layer 10 with REE.

Claims (1)

Claim The method of forming tailing dumps and storing in them the tailings of concentration plants containing metal sulfides and rare earth elements, including the construction of a pit and separate layer-by-layer stacking in it of tailings of various mineralogical composition within a single storage, having a dividing wall, is different from the same. what. in order to interact with the layers of tailings and increase the efficiency of their storage as a result of the resulting differentiation of useful components contained in the tailings, a continuous 5 anti-filtration coating is arranged around the entire perimeter of the pit, a drainage layer is successively laid on the bottom of the storage over its entire area, the first layer of tailings, containing metal sulfides, and an anti-filtration clay screen, then a partition made of clay material and, simultaneously with its erection, on both sides of it, a drainage layer is formed successively on one side, the second layer of tailings C is greater than in the first layer 15 in the content of metal sulfides and the third layer tailings containing sulphides as in the first layer, and on the other hand the fourth layer of tailings containing metal sulphides as in the second layer, as well as the first layer of tailings containing rare-earth elemental second layer of tailings with a lower content of rare-earth elements than in the first layer, 10 third layer of tail c, containing metal sulfides, and the second layer of tailings containing rare earth elements is formed with the formation of a gap between them, which is then filled with drainage material.