METHOD OF ORE PRETREATMENT OF OXIDISED GOLD-CONTAINING ORES FOR HEAP LEACHING OF GOLD Russian patent published in 2010 - IPC C22B11/00 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: method includes screening of ore, grinding, repeated screening, crushing, screening, repeated crushing and screening. Then it is implemented blending of ore with binding agent, containing cement in the amount 30-50 kg/t of ore, moistening up to 12% of humidity, granulating and formation of heap from received pellets for gold leaching. In the capacity of binding agent during blending it is used mixture from cement and self-disintegrating ferroslag, which is 30-50% of total amount of mixture. Ferroslag allows following composition, wt. %: Cr₂O₃ -5.5-6.5; SiO₂ - 24.5-26.5; CaO - 46-48; Al₂O₃ - 4.0-5.0; MgO - 13.5-14.5; moisture - 0.5-1.1. Usage in the capacity of binder of mixture from cement and self-disintegrating ferroslag give ability of ability to reduce amount of used cement, increased efficiency of method.

EFFECT: upgraded efficiency of method.

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