POSSIBILITIES OF copper-nickel ore tailings COMPLEX PROCESSING
The study of possible ways for complex processing of copper-nickel ore tailings at «Kola MMC» JSC is suggested. The experiments were carried out with the tailings from the current production. The authors suggest a flow sheet for integrated hydrochloride acid treatment of the copper-nickel tailings floatation concentrate. The flow sheet suggests the production of amorphous silica, Ni, Co, Cu containing spinel and various magnesium compounds: brucite, hydromagnesite, hydrotalcite, etc. The extraction of non-ferrous metals into spinel was as follows, %: nickel - 99, copper - 99, cobalt - 98. The tailings were used as a raw material for production of building materials.