FACILITY FOR EXTRACTING PRECIOUS METALS OUT OF TAILS Russian patent published in 2009 - IPC C22B11/00 C22B3/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to hydrometallurgy, particularly to facility for extraction of precious metals, notably, gold and silver out of tails and other materials with high contents of fine fractions. The facility consists of a solution proof base and a border and also of a drainage system. The drainage system is made in form of a perforated tube with a gate at a discharge end. On the solution proof base there are successively laid: a layer of crushed stone of 2-5 mm size and of 150-200 mm thickness, then a layer of crushed stone of 5-40 mm size and 300-600 mm thickness, in the central part of which the perforated tube is located, then there is a layer of fabric out of geotextiles and a layer of crushed stone of 2-5 mm size and of 200-300 mm thickness; also the solution proof base is made with counter incline of 3-5° from each side from two counter borders into the direction of the perforated tube and also with the incline to horizon of 2-4° into the direction of the discharge end of the perforated tube in a vertical plane passing through the central longitudinal axis of the perforated tube.

EFFECT: facilitating extraction of precious metals out of materials with high contents of fine fractions and also simplification and reduction in cost of facility and its operation.

3 dwg