To provide a treatment method whereby sulfur content and water-soluble Ca content can be effectively reduced in slag containing sulfur and Ca.
The treatment method comprises steps of: soaking the slag containing sulfur and Ca in a solvent, blowing carbon dioxide into the solvent and adjusting pH of the solvent to 4-10, thereby extracting a sulfur component and a Ca component contained in the slag into the solvent and reacting the extracted Ca component with the carbon dioxide so as to produce calcium carbonate; and recovering the calcium carbonate together with the treated slag. The treatment method enables efficient extraction of the sulfur component and the Ca component contained in the slag into the solvent and fixation of the Ca component as calcium carbonate, thereby effectively reducing the sulfur content and the Ca content in the slag containing sulfur and Ca.
COPYRIGHT: (C)2011,JPO&INPIT
Keiji Watanabe
Katsunori Takahashi
Kazuya Yabuta
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| JP52105576A | ||||
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| JP5342200A |