| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a dried fluorine-containing neutralized sludge and its utilizing method in which the fluorine-containing neutralized sludge obtained from acidic waste liquid is not only made into dried fluorine-containing neutralized sludge under state of keeping existence form of the contained material but also, this sludge is simply treated at a low cost. <P>SOLUTION: The dried fluorine-containing neutralized sludge is heated to 100-310°C after dehydrating the fluorine-containing neutralized sludge produced by neutralizing the acidic waste solution of metal or semiconductor with lime, so that the moisture content is≤15 mass%. Then, when performing molten iron treatment for reducing undesirable components in the molten iron by blowing a refining agent with carrier gas into the molten iron held in a reaction vessel, this dried fluorine-containing neutralized sludge is utilized as the refining agent. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
