Process suitable for refining and impurity removal of low-calcium-magnesium crude nickel sulfate

The invention discloses a process suitable for refining and impurity removal of low-calcium and low-magnesium crude nickel sulfate, which adopts a process of removing copper by sulfuration, removing iron by oxidation and hydrolysis, and further extracting, separating and removing impurities by C272 to perform refining and impurity removal, so that the treatment stage is reduced, the traditional nickel sulfate refining process is greatly shortened, and the removal of impurities such as copper, iron, lead, zinc and the like can be effectively realized. 本发明公开了一种适用于低钙镁粗硫酸镍精制除杂的工艺，采用硫化除铜、氧化水解除铁、C272进一步萃取分离除杂的工艺进行精制除杂，减少了处理级数，大大缩短了传统的精制硫酸镍流程，且可以有效实现铜、铁、铅、锌等杂质的去除。