SU1548416A1 - Method of leaching dumps - Google Patents

Abstract

This invention relates to the mining industry and can be used in open pit mining. The goal is to increase the efficiency of the leaching process of dumps by increasing the degree of extraction of the useful component, reducing the consumption of the reagent and the time of leaching. Sleep dump rock mass (GM) with the off-balance content of the useful component. Tailings are formed from tailings of ore. After dumping, the boundary between the upper zone of fine-grained GM and the lower zone of coarse clastic material is determined. Isolate the lower zone from the upper zone by injecting a hardening mixture. The reagent solution is then injected in the upper zone together with the tailings. Collect productive solutions. After the concentration of the useful component in the latter drops to the level of the useful component in the GM from the lower zone in the last drill hole, they are charged with explosives and reagent ampoules. The explosive loosening of the GM is carried out. The reagent solution is fed to the lower and upper zones.

Description

This invention relates to the mining industry and can be used in open pit mining.

The aim of the invention is to increase the efficiency of the process by increasing the degree of extraction of the useful component, reducing the consumption of reagent and leaching time.

The method is carried out as follows.

On the slope of the relief, dumps of off-balance ores and overburden from the dispersion halos and near-contact zones of the ore body are poured. At the same time, according to laboratory and chemical research data, the content of the useful component is determined by fractions and porosity of the pieces and, on this basis, the boundary fraction is determined by size, which can be efficiently processed without prior crushing. They also form a tailing from the tailings of ore. After the dump is formed, the boundary between the rock mass formed as a result of segregation during its dumping by the upper zone of the fine fractional rock mass and the lower zone of the crust of 4

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clastic material. An acid-resistant, bitumen-containing and hardening compound is injected into the upper zone through the pre-drilled in the mass of the slope of the well. Then, the reagent solution together with the tailings from the tailings store are injected into the upper zone. Due to the presence of fine fractions (tails) containing ore Q minerals, the reagent solution infiltrates at a low speed, which ensures a more uniform and complete contact of the solution with the mountain mass of the upper zone. To eliminate the effect of soldering, periodically and in pulsation mode ayut uplink reactant stream with tails through wells. The formed during leaching upper zone 20 pregnant solution was collected and analyzed for its content of the useful component,

After the content of the useful component in the productive solution 25 of the upper zone decreases to the level of the useful component in the material of the lower zone of coarse material, pipes of explosives and ampoules are placed into the lower zone of the wellbore dump. with reagent and explosive loosening. At the same time, simultaneously with loosening, the lumpy material is impregnated with hot vapors of the reagent. After that, the lower part of the blade is leached in parallel with the additional leaching of the upper zone.

An example, Dumps are filled into a beam with a height difference of more than 100 m. In the process of dumping, segregation of pieces occurs by size. At a level of 45-50 m, fractions of 100-150 mm with a molybdenite content of 0.04-0.08% are deposited from the sole of the blade in accordance with surveying measurements. This layer is separated by injecting cement slurry from the bottom of the heap and the atmosphere to eliminate the oxidation of sulphides. The reagent solution is fed through g pipes placed in wells that are drilled from an adit traversed in the mountainside by NKR-100 Pipes machines.

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at the front end, placed in the dump, perforated. Diameter of pipes is 100 mm. The reagent is sodium hypochlorite (NaCIO) 5% concentration. After reaching the concentration of sulfide molybdenite in the upper zone solution, its content in the mountain maize of the lower, lumpy zone (0.02% or less), polyethylene pipes with charged explosives and polyethylene ampoules with hypochlorite solution are drilled into the lower part of the array Sodium 50% concentration. Produces explosive loosening of rocks in the lower zone. Next are joint leaching of the upper and lower zones.

Claims (1)

Invention Formula The method of leaching dumps, including the formation of a dump from the rock mass with an off-balance content of the useful component and tailing dump from the tailings of ore, and the subsequent leaching of the rock mass and tailings of the reagent solution and the collection of productive solutions, which are process efficiency by increasing the degree of extraction of the useful component, reducing the consumption of reagent and leaching time, after the formation of the blade, determine the boundary between the resulting During segregation of the rock mass, when it is filled with the upper zone of the fine fractional rock mass and the lower zone of coarse material, they isolate the latter from the upper oxychloride by injecting a hardening mixture, then inject the reagent solution into the upper zone, and after the concentration of the useful component in the productive solutions the upper zone to the level of the content of the specified useful component in the material of the lower zone, in the latter passes the wells, charge them with explosives with ampoules of reagent and blasting followed by feeding the reagent solution into both zones.