| 摘要 |
<p>PURPOSE: To recover an alloy of platinum group elements at a high recovery rate by simple operation from used nuclear fuel. CONSTITUTION: A retreating liquid dispersed with an alloy of platinum group elements in a particulate form is prepd. by dissolving the used nuclear fuel in a nitric acid at 70 to 95 deg.C in a first method. The retreating liquid and acid resistant magnet are brought into contact with each other, by which the alloy of the platinum group elements is adsorbed on the acid resistant magnet and recovered. The retreating liquid is subjected to sepn. of solid from the liquid and a slurry is prepd. by adding water to the non-dissolved residues and the slurry is brought into contact with the acid resistant magnet, by which the allay of the platinum group elements is adsorbed on the acid resistant magnet and recovered in a second method. The retreating liquid after the particulates of the alloy of the platinum group elements of the first method are recovered by the acid resistant magnet is filtered or the slurry after the particulates of the alloy of the platinum group elements are recovered by the acid resistant magnet from the slurry of the second method is filtered, by which the recovery rate of the alloy of the platinum group elements is further increased.</p> |
