METHOD FOR GEOTECHNOLOGICAL SUBSTANDARD HEAVY METAL SULFIDE CONTAINING ORE MATERIAL TREATMENT Russian patent published in 2006 - IPC E21B43/28 

FIELD: environmental geology, particularly dissolving minerals other than hydrocarbons, for instance by an alkaline or acid leaching agent for ore material storage and dressing.

SUBSTANCE: method involves forming antifiltering and drainage layers on surface of dump to be formed and providing inclination for solution flowing down; arranging substandard heavy metal sulfide containing ore material layer to be leached, resolution enhancing mineral, namely pyrrhotine, and chemically active nonmetallic mineral on drainage layer, wherein the substandard heavy metal sulfide containing ore material is remainder material obtained during copper-nickel ore dressing, concentrated pyrrhotine, substandard copper-nickel ores and substandard mineralized phyllites. Sulfide containing ore material comprises serpentines and carbonates as chemically active nonmetallic minerals. Before ore material leaching the ore material is subjected to deslurring along with separation of fine fraction having particle dimensions of 0.025 mm or less. The layers are inclined at 2°-6° angles to horizon line. Layer to be dressed is formed of substandard sulfide ore material containing precipitation mineral, namely serpentine, in amount of not less than 60%. The ore material is preliminarily roasted at 620°-680°C temperature. Layer to be dressed is arranged outside the layer to be leached and drainage layer in flow direction and communicated with drainage layer through side surface of drainage layer. Layer to be dressed may be arranged in longitudinal section row installed along the strike of above layer. After dump forming layer to be leached treatment is performed by periodic natural or forced watering thereof to solve heavy metals so that solution is created. The solution passes through specially formed drainage channels to layer to be dressed.

EFFECT: increased efficiency of substandard ore material treatment due to increased simplicity and decreased costs.

6 cl, 2 ex, 4 dwg