The invention relates to a new method for removing
fluorine in a
zinc solution through
sodium aluminate, and belongs to the field of
zinc hydrometallurgy. The new method comprises the specific operation steps that 1, industrial grade
sodium aluminate powder and water are mixed to prepare a
mixed solution with the concentration of 5%-50%, the solution is sufficiently stirred for use, and the
mixed solution has no obvious agglomeration phenomenon after being sufficiently mixed; 2, the
sodium aluminate solution is gradually added into the
fluorine-containing
zinc solution (with the
fluorine content being 100-600 mg / L), sufficient stirring is carried out for removing fluorine, the fluorine removing temperature is controlled to be 15-50 DEG C, and the fluorine removing time is controlled to be 0.5-2 h; and 3, after the reaction in the step 2 is finished, a zinc solution with fluorine removed and fluorine-removed
slag are obtained through
solid-liquid separation. According to the method, the industrial grade
sodium aluminate powder is adopted for the first time in the technology of removing fluorine in the zinc solution, the fluorine-removed
slag amount is reduced, the filter performance of the solution with fluorine removed is improved, the industrial grade
sodium aluminate powder is easy to obtain, the purification temperature is low, purification time is short, the fluorine removing technology is simplified, and
economic benefits of enterprises are improved.