FIELD: metallurgy.
SUBSTANCE: method of heap leaching of silicate nickel ores includes ore crushing, ore mix preparation with fluoride adding from the group: sodium silicofluoride, fluoric calcium, ammonium fluoride and/or ammonium hydrofluoride amounting 1.3-1.7 wt % (in terms of fluorine). Then the mix is balled by pelletizing using the concentrated sulphuric acid in the ratio S : L = (88.0-94.0): (6.0-12.0) as a binder. After pelletizing the pellets are laid in a heap and leached by sulphuric acid solution.
EFFECT: shortening time of leaching at high level of extraction of nickel, cobalt and magnesium, decrease of power and material inputs.
4 cl, 1 tbl, 2 ex
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