| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a manganese recovering method capable of easily recovering the surface crystal high in manganese content from a fluidized medium increased in grain size through the manganese crystallization. SOLUTION: In a method for treating the water containing manganese to remove the soluble manganese through crystallization by passing the water to be treated containing the carbonic ion from a tank bottom part in an upstream flow into a fluidized bed reaction tank having no support floor with manganese sand as the fluidized medium, pouring an alkaline agent in close proximity to an inlet of the water to be processed of the tank bottom part and/or in the fluidized bed, adjusting the pH value of the processed water in the fluidized bed to be 8 to 10, the fluidized medium increased in grain size through the manganese crystallization from the reaction tank is removed and heat treated to drop the adhesion strength of the manganese crystal on the surface of the fluidized medium, and then the surface crystal high in ratio of manganese containing water is recovered. The heat treatment is preferably achieved for at least 30 minutes at 100 deg.C or over, and the fluidized medium after the surface crystal is recovered can be re-used as the fluidized medium.</p> |
