(1. 云南大學 材料科學與工程系, 昆明 650091;
2. 昆明理工大學 冶金系, 昆明 650093)
摘 要: 采用揮發(fā)廢貴金屬催化劑中載體三氧化二鋁的方法， 在自制的真空爐中富集貴金屬。 研究結果表明： 在溫度為1473~1673K時， 真空度大于666.7Pa下, 反應蒸餾3h, 可使氧化鋁還原20%左右, 貴金屬富集1.2倍； 相同條件下蒸餾4次, 可使貴金屬富集1.6倍, 收率大于92%； 連續(xù)性蒸餾可使貴金屬不斷富集, 同時貴金屬損失極少。
關鍵字: 低價硫化鋁； 催化劑； 貴金屬富集
（1. Department of Materials Science and Engineering,
Yunnan University, Kunming 650091, China;
2. Department of Metallurgy, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:The concentration of precious metals in the waste catalyst by reducing Al2O3 with sub-sulphide of Al in special vacuum furnace was studied. Under condition of temperature 1473~1673K, vacuum ＞666.7Pa, the reduction ratio of Al2O3 can achieve 20%, the concentration multiple is 1.2. For a fixed amount of reactant, the concentration multiple rises to 1.6 through four distillations, and the overall recovery ratio of precious metals surpasses 92%.
Key words: alumimum sub-sulphide; catalyst; concentration of precious metals
