| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the recovering efficiency of valuable metals from raw material or waste containing metallic oxide and further, to provide a method for making the metallic oxide valuable by which the concentrated valuable metal and the remaining metallic oxide can be separated at higher separating efficiency. <P>SOLUTION: This method is provided with a process, in which the raw material or the waste containing metallic oxide is made to be fine grains under high temperature and high pressure state with an impact reaction apparatus, a process, in which the above raw material or the waste containing metallic oxide under above state, is reacted with a reactive fluid under reducing atmosphere and at least one element of the valuable metal selected from the group composed of iron and metal elements nobler than the iron contained in the above raw material or the waste, is reduced, successively a process, in which the concentrated valuable metal concentrating the valuable metal is separated from the remaining metallic oxide by utilizing the difference of these characteristics and a process, in which the separated, concentrated valuable metal is recovered. <P>COPYRIGHT: (C)2004,JPO</p> |
