SU1506092A1 - Method of leaching minerals from ore bodies - Google Patents

Abstract

The invention relates to geotechnology and is intended to leach minerals from low-permeable ore bodies. The goal is to increase the reliability of the leaching process while accelerating leaching. To do this, the ore body is opened with a hole with a drill in the underlying rocks. In the well place operational and mortar columns. The casing annulus cement. The well is divided above and below the ore body into intervals in height and perforated the production string and the cement ring at intervals. In the overlying rocks from the upper interval of the well to the lower, the density or height of the interval is reduced, and in the underlying rocks, the density or height of the perforation interval from the upper interval to the lower. Within the overburden, a leaching solution is pumped through the perforations simultaneously at all intervals. Through the perforation holes of all intervals simultaneously within the underlying rocks pump out productive solution. While ensuring uniform processing, the method allows treating large areas of the ore body with a solution. 1 il.

Description

The invention relates to geotechnology and can be used for mineralizing minerals from weakly native ore bodies, a preferred linto-reverse type “

The aim of the invention is to improve the reliability of the technological process of desiccation while simultaneously accelerating the pcellus.

The drawing shows the scheme of maintaining rpg h} t but npcr p.

The method is illustrated by the example of leaching of minerals from low-permeable ore body 1, occurring in well-developed rocks, for example, of the pegchi-type. The productive horizon lies in the water-bed,

The ore body 1 hole south south 2 with overburden in breeding, after which, in the well 2, expelled to the ground 3,

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e.g. polyethylene, and cementation of the annulus. Then, a perforator is lowered into the well, and perforation of the column 3 and the cement ring

Within these breeds, perforations are carried out intermittently along the height of column 3. Within the overburden rocks, 4–6 perforation intervals are formed. Within the underlying rocks, 7–9 perforation intervals are formed. The density or height of the perforation interval from the upper interval to the lower one is reduced. , Tobo height of perforation interval 4 with equal density greater than the height of perforation interval 5 which in turn is greater than the height of interval 6c. At equal heights of the intervals, the perforation density can be changed in each interval, if it does not reduce the strength properties of the column Zo With sufficient strength of column 3 and equal heights of intervals, the perforation density in the interval 4 is greater than the perforation density in the interval 5, which is greater than the perforation density in the range of 6 o In such a way that column 3 remains strong enough , it is possible to change the perforation density, and if at dense perforation the strength of the column significantly decreases, then it is advisable to change the heights of the perforation intervals at equal density.

Within the bedrock, on the contrary, from the upper interval 7 to the lower 9, the density or height of the perforation interval increases. Toei, with an equal density of the height of the perforation intervals, increases from 7 to 9, and with an equal height, the perforation density from 7 to the interval H,

The perforation density or height of perforation intervals is taken depending on the filtration properties of rocks, the costs of overplating mortar and ToDs, and the distances between the perforation intervals depend on the same indicators and on the thickness of permeable rocks. The density, the height of the intervals and the distances between the intervals are optimized first on the models, and then in specific geological conditions, by conducting experimental experiments in natural conditions.

After perforation of the column and cement ring into the production column 3, the solution-lifting column 10 is introduced and, using a packer 11 located above the perforation interval 7, the perforation intervals 4-6 are separated from the intervals 7-9.

Following this, in the gap between the production column 3 and the column 10, perforated openings of intervals 4-6 are pumped into a target solution, for example, a solution of sulfuric acid or a carbonate solution. The solution is pumped simultaneously at all specified intervals. Simultaneously with the injection, the productive solution is pumped out of the perforation intervals 7–9 and the solution is dispensed through the solution-lifting column 10 to the surface.

Due to the well preparation, the greatest amount of leaching solution enters the zone adjacent to the upper reservoir, and the smallest to the ore body 1, at the same time the largest amount of productive solution is pumped out from the lower reservoir and the smallest from the ore body I. The body 1 is treated with an approximately equal amount of exceeding gel per unit volume, since the zone treated with the solution, the amount of which is minimal per unit of time, is the smallest in area, since adjacent to the hole "K periphery orebody from well treatment area increases, but at the same time is increased and the amount of solution passing through this area in the same time unit. For example, through the wellbore area of 30 m through perforation of interval 6 through the ore body to the perforation interval 7, 1 m of solution is filtered per hour, and through the peripheral zone of 400 m, the solution extending from interval 4 and pumped out in interval 9, is filtered m / h At the same time, there is approximately a balance of equality of treatment with a solution of a unit of the manual body area. I

If a common raft; 1l pl (, are the spaces of the solution, sludge depress at intervals 6 and 7, assign 1nnp to the peak.

this is treated with a solution that closes at intervals of 4 and 9 is very significant.

Thus, the proposed method allows treating large areas of the ore body with a solution while ensuring uniform processing, while compared to a known method, the proposed method is immeasurably simpler both from a technological point of view and from the point of view of the equipment used. Simplicity ensures high reliability of the leaching method.

Claims (1)

Invention Formula The method of leaching of minerals from ore bodies, including the opening of the manual body by a well with a drill in the underlying rocks located in the well of production and solution-lifting columns, the separation of the well above and below the ore body at intervals in height, injection 1506092 leaching solution within the overburden and pumping out the productive solution within the ppdt tilting rocks, which is characterized by the fact that, in order to increase the reliability of the technological process while simultaneously accelerating the leaching, space of the production string, produce interval perforations of the production string and the cement ring, while in the overburden reduce the density or the height of the perforation interval from the upper interval of the well to the lower one and increase the density or height of the perforation interval from the upper interval of the well to lower in the underlying rocks, and the leaching solution is pumped through the perforations of all the intervals within the overburden at the same time, and the production solution is simultaneously pumped through the perforations openings of all intervals within the bedrock of