| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing an artificial baked water retention material with a low elution level of hexavalent chromium at low production cost when an artificial baked water retention material is produced using incineration ash of paper making sludge as a raw material. <P>SOLUTION: The method for producing an artificial baked water retention material is provided, which includes adjusting the median diameter of raw materials mainly composed of incineration ash of paper making sludge to 50 to 400μm and then baking for 5 to 10 minutes at a baking temperature ranging from 600 to 900°C. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
