| 摘要 |
<p>PURPOSE:To easily pulverize the alloy and to improve the recovery rate of Ti and Nb by heating a Ti-Nb alloy ingot in vacuum, occluding hydrogen into the ingot and pulverizing it. CONSTITUTION:The ingot or scrap of Ti-Nb alloy is charged into a vacuum vessel; while pressure is reduced, the vessel is heated to about 200 to 500 deg.C and is held. A hydrogen gas is introduced thereto to occlude hydrogen the Ti-Nb alloy. The Ti-Nb hydride is pulverized by a mortar or the like. Since cracks have been generated on the inside of the alloy by the hydrogen occlusion, it can easily be pulverized. The pulverized alloy is subjected to dehydrating treatment. The alloy is subjected to chlorinating treatment into chloride, which is distilled and separated into TiCl4 and NbCl5. They are reduced by Na and Mg, by which Ti and Nb can be recovered at high yield.</p> |
