Technology for preparing cell-level high purified nickel sulfate by the selective leach of water quenching high grade nickel and sulfuric acid

The invention is a technique of making battery-level highly pure nickel sulphate by selective extraction of water quenched high nickel matte with vitriol, and its character: it contains in turn: finely grinding the high nickel matte, the first stage, normal pressure extraction, making evaporation crystallization on the extract and pulping the residues for preextraction; the second stage, pressure extraction, return the extract to the first stage for normal pressure extraction, and making pressure extraction on the residues in the third stage, and making copper electrowinning process on the extract to produce copper or evaporation crystallization on the extract to make copper sulphate, and returning the anode solution for the copper electrowinning process or the mother solution for evaporation crystallization for pulping and preextraction, making vacuum evaporation crystallization on the extracts in the three stages to make battery-level high-purity nickel sulphate. 一种水淬高冰镍硫酸选择性浸出制取电池级高纯硫酸镍工艺，其特点是依次包含将高冰镍细磨，第一段常压浸出，浸出液送蒸发结晶，浸出渣浆化预浸，第二段加压浸出，浸出液送回第一段常压浸出，浸出渣第三段加压浸出，浸出液铜电积生产电铜或蒸发结晶制取硫酸铜，铜电积的阳极液或蒸发结晶的母液再送回浆化预浸，将第一段常压浸出、第二段加压浸出、第三段加压浸出液进行真空蒸发结晶制取电池级高纯硫酸镍。其工艺具有水淬高冰镍原料成本低，工艺设备及参数先进，辅助材料和动力消耗低，劳动生产效率高，产品质量好，生产过程清洁，无污等优点。