| 摘要 |
PURPOSE: Provided is a method for preparing calcium oxide which has high purity and high solubility in water within a short calcining period. CONSTITUTION: The method comprises steps of: (i) breaking up dried shells into a fine powder having a diameter of about 5 millimeter; (ii) after putting the prepared shell powder in a heatproof container, putting the heatproof container in an electric furnace; and (iii) electrolyzing the shell powder in the electric furnace by applying 1,000-3,000 alternating current voltage at a temperature of 1,500-3,000 deg.C for 30-120 minutes.
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