| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a slag-fuming method which can yield a dust that contains zinc, lead and little amount of arsenic, antimony and a halogen group element, and a slag that stably satisfies a standard for a soil environment at a high volatilization rate of zinc in a process of volatilizing and separating zinc and lead from a slag that is produced in a smelting furnace for smelting zinc and/or lead, and contains zinc, lead, arsenic, a halogen group element and the like. <P>SOLUTION: The slag-fuming method includes producing a melt of the slag and a copper source by charging them into the furnace, and fuming the slag by any one of the following methods (a) to (c): (a) charging a carbonaceous reducing agent into the melt, and blowing or spraying a gas containing carbon dioxide into or onto the melt; (b) blowing or spraying a gas containing carbon dioxide into or onto the melt, while charging a carbonaceous reducing agent into the melt; and (c) blowing or spraying a carbonaceous reducing agent into or onto the melt while using a gas containing carbon dioxide as a carrier gas. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
