Study on Defluorination and Synergistic Aluminum Removal from High Fluorine Zinc Sulfate Solution
Taking high-fluorine zinc sulfate solution as the research object,the effects of reaction time,aluminum sulfate addition and fi-nal pH value on fluoride and aluminum removal in the solution were compared with the cost of defluorinating auxiliary materials of de-fluorinating agent.The results showed that time had little effect on defluorination,which directly affected the fluoride removal rate.The removal rate of fluorine in 12-15g/l solution with aluminum sulfate is above 50%,and the final pH value of the solution affects the re-moval rate of aluminum in the solution and promotes the removal of fluorine.The final pH value of the solution is controlled above 4.9,and the removal rate of aluminum is above 99%.This method of removing fluorine and aluminum with aluminum sulfate and slaked lime has high removal rate and low economic cost,and will not introduce new cations into the main process solution.
high fluorine zinc sulfate solutionaluminum sulfateterminal pHeconomic cost
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