METHOD OF COMBINED DEVELOPMENT OF GOLD DEPOSITS Russian patent published in 2019 - IPC E21B43/28 E21C41/00 

FIELD: mining.

SUBSTANCE: invention relates to the technology of combined development of gold placers with predominantly thin, fine and dispersed gold. Method of combined development of placer gold deposits includes preliminary placement and fractionation of the mineral component in an accumulation cell with hydro-insulated walls and bottom, with precipitation, treatment with the reagent solution and metal recovery by heap and sorption leaching. After waterproofing the walls and the bottom of the accumulation cell in its central part, dams and stack are placed successively in the course of drainage, arranged in series with the inclusion of a dam from the sandy fraction of sands washing tails, a stack of schlich minerals and a gravel component dam. After that, the aleurite fraction of tailings is cyclically fed into the accumulation cell in the form of a water-mineral mixture with small, lamellar gold and fine particles of magnetite, hematite, goethite, limonite and quartz, which are not fully extracted on the washing device, with the preliminary implementation of the quenching of the flow rate by local turbulence on the removable magnetic rods installed in front of the entrance to the accumulation cell, subsequent decantation of the water-mineral mixture and filtration through dams and a stack of residual most fine colloidal particles. After oxidation of the main part of schlich minerals in the stack of schlich minerals with oxygen of the air and opening of dispersed gold in it, an activated solution of the leaching agent for gold is fed into the stack of schlich minerals by means of the reagent preparation system. After drainage through the gravel dam component, the primary productive solution is accumulated in the distant part of the accumulation cell, mixed with pulp sediment formed after decanting the water-mineral mixture at the entrance to the accumulation cell and transported by a pumping system, and gold is recovered by leaching with an activated reagent solution. When the productive solution in the liquid phase reaches a specified threshold value of gold, it is fed to the electrosorption columns in order to extract dissolved gold from it to the sorbent in suspension.

EFFECT: increasing the leaching efficiency, as well as reducing the loss of gold.

1 cl, 2 dwg