Salt pile isolation in potassium mines

FIELD: methods of surface mining, particularly for following natural stone treatment by covering or impregnating thereof with liquid or other flowable substances on surface.

SUBSTANCE: method involves gunning salt pit surface with waterproofing agent; covering salt pile surface with clay-and-salt mud layer in dry and hot season after salt pile hardening in at least 1.0-1.5 months after pile filling with salt. The clay-and-salt mud is sylvinite ore-dressing waste obtained from chemical factory. The clay-and-salt mud layer has 10-20 mm thickness and is formed by gunning salt pile surface with above mud material. The clay-and-salt mud is supplied into pneumatic pump receiver, wherein solid/liquid phase ratio is 1:2 - 1:3.

EFFECT: increased efficiency of salt pile waterproofing.

 

The invention relates to various processes, and in particular to methods post-processing of natural stone by coating or impregnation fluids or fluent substances on the surface.

In 2003, on the surface of the earth on the territory of mining OJSC "Uralkali" stored about 14 million tons of solid waste. This two million tons more than in 2002. Now the total mass of salt dumps is about 250 million tons.

On the protection of "Belaruskali" is about 80 million tons of clay-salt slurries and 660 million tonnes of halite wastes, located in an area 904 and 762 hectares respectively. In Salihorsk district kalynych mines fixed salinization of groundwater under salt dumps and landfills, rasprostranivsheysya already at a depth of no more than 100 meters as a result of wind erosion of salt dumps happens and areal soil pollution.

Rasoloarison fresh colodado varies from 8 to 12%. Full saturation of waste brines at the time of filing on salaatul reaches 18-20%. Due to the pressing deep into the pile and evaporation of the liquid phase content in the salt dumps decreases and remains equal to 5-7%. The intensive process of squeezing the liquid phase and simultaneously seals the waste continues 15-18 hours, after which the seal becomes inconspicuous.

Solid halite waste the possession is t high caking. Sliianie of colodado occurs not only due to compaction under its own weight, but also due to recrystallization of the salt from the compressed brines. Moreover, the coupling of individual grains initially manifested in the surface area of the blade when it is drying, and through 1.0-1.5 months is the hardening of the entire array.

Are the salt dumps more than ninety percent of salt. The intensity of salinity adjacent to the Salihorsk mines areas is low, because precipitation is the leaching of the salt components and eventually salaatul covered with a thin elastic clay wrap, which hinders the salt spray (Genkina Century Underground brines and waste mountains. RESPUBLIKA. The newspaper of the Council of Ministers of the Republic of Belarus. No. 50 (3490), 17.03.2004,).

Clay-salt slurries containing up to 40-62% of water, 6-20% KCl, 5-24% NaCl, 0.14 to 7% MgCl2, 0,03-0,1% CaCl2, 2-5% CaSO4and 5-28% insoluble residue, which is dominated by clay minerals. These slimes in suspension pump are served in the slurry tank (pit) at a ratio of solid and liquid phases from 1: 2 to 1: 3 [1, s].

There is a method of isolation of the salt dumps on potash mines, including filling their surface waterproofing material, which is taken as the prototype [1].

The disadvantage of known the way is the low efficiency of waterproofing used for this purpose, the polymer due to its lack of elasticity.

The aim of the invention is to increase the efficiency of water proofing Solombala by applying a more elastic material.

This objective is achieved in that the surface of Solombala covered with a layer of clay-salt slurry thickness of 10-20 mm

The method is as follows.

After hardening of the entire array of Solombala, but not less than 1.0 to 1.5 months after dumping salt in a pile in the hottest and driest period of its surface covered with a layer of clay-salt slurry remaining after enrichment of sylvinite ores on gallerycheck factories, of a thickness of 10-20 mm by gunning this sludge surface Solombala. When this sludge in suspension is fed into a hopper of pneumonias when the ratio of solid and liquid phases from 1:2 to 1:3.

After drying of the sludge surface Solombala covered durable cake, as preventing wind erosion and dissolution of salt precipitation. Significant environmental effect is achieved through the use of waste products.

It should be also noted that this clay membrane screen has a high mechanical strength and water resistance due to the fact that it contains a polyacrylamide added to the thickener to accelerate the deposition of the clay is about sludge [2, p.37].

The method can be implemented, for example, using pneumomechanical WITH-50 pfbr (design engineer Marchukova NS). The pump is designed for transportation and layering on a different surface(spraying method) mortars and fine concretes minimum mobility 6 cm, with a particle size fraction of the filler is not more than 10 mm, discharge (investirovanie) solutions and other liquids in different cavities and arrays of concrete, stone, soil, etc. in order to strengthen them. The range of feed solution vertically not less than 100 m and horizontally not less than 300 m

Sources of information

1. Permiakov, R.S., V.S. Romanov, Beldy BTW, mining Technology salts. / / M.: Nedra, 1981, s.

2. Processing of natural salts and brines //Directory/ Idiomelon, Avearage, Ussurian and others; Ed. by I. Sokolov. L.: Chemistry, 1985, p.37.

The method of isolation of the salt dumps on potash mines, including filling their surface waterproofing material, characterized in that after hardening of the entire array of Solombala, but not less than 1.0 to 1.5 months after dumping salt in the dump, in the hottest and driest period of its surface covered with a layer of clay-salt slurry remaining after enrichment of sylvinite ores on gallerycheck factories, of a thickness of 10-20 mm by gunning Yes the NYM sludge surface Solombala, when this sludge in suspension is fed into a hopper of pneumonias when the ratio of the solid and liquid phases from 1:2 to 1:3.



 

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