METHOD FOR REMOVING FLUORINE FROM SULFURIC ACID/ACIDIC ZINC SULFATE SOLUTION

PROBLEM TO BE SOLVED: To efficiently adsorb and remove fluorine stored in a process liquid for wet type zinc refining obtained by dissolving a zinc-containing material comprising fluorine on a high level from the liquid. SOLUTION: For solving the above problem, a fluorine adsorbent which has been an object for disposal in the conventional process since the adsorption of fluorine lies in a saturated state in a low fluorine concentration solution is effectively activated as the one having sufficient adsorption sites as the fluorine adsorbent with a fluorine high concentration solution as an object. Further, an iron compound generated in the present process is used as a fluorine adsorbent, and the concentration of fluorine in the process liquid for wet type zinc refining is controlled to an objective range; thus the cost of the required adsorbent is reduced. In this way, the using amount of a zinc-containing material as an inexpensive raw material as the one for wet type zinc refining can be increased as well, and the total cost in the wet type zinc refining process can be reduced. COPYRIGHT: (C)2008,JPO&INPIT