| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for volatilize-separating or wash-separating lead, zinc and copper contained in molten flying ash by heating pellet of the molten flying ash. <P>SOLUTION: The molten flying ash is granulated to make the pellet of the molten flying ash, and eutectic mixture having two or more components among CaCl<SB>2</SB>, NaCl and KCl, is generated by heating the above pellet at 800-1100°C and also, lead oxide contained in the eutectic mixture and the pellet is chlorinate-reacted to make lead chloride, or unburnt carbon dust and iron oxide, zinc oxide contained in the pellet are reduction-reacted and the respective materials are volatilized and separated as a single zinc, or the unburnt carbon and copper oxide contained in the pellet are reduction-reacted and a single copper is generated, and this pellet is washed with water and soluble components are removed, and the residue of the pellet containing the single copper is recovered. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
