钙热还原及熔盐萃取联合法一次性制备低氧低氟金属镝

One Time to Produce Low Oxygen and Low Fluorine Dysprosium Metal by the Combining Method of Calcium Reducing Agent and Fused-Salt Extraction

对低氧低氟金属镝的制备工艺及机理进行研究,结果表明:采用氟化氢铵处理后,再用氟化氢气体氟化,并进行脱氟处理的干法氟化工艺,可得到高纯氟化镝,氟化率达99.9%;采用钙热还原及熔盐萃取联合法一次性制备工艺,可有效降低金属镝中的氧、氟含量,制备的金属镝纯度大于99.9%。

In this paper,firstly,Dy2O3 acted by NH,HFz change to be porous. Secondly, Dy2O3 is fluorinated by HF gas and defluorination process is used. During fused-salt extraction, one time to produce low oxygen and low fluorine dysprosium metal by the combining method of calcium reducing agent and fused-salt extraction are used. Results show that fluorination rate of Dy2O3 reaches 99.9%, oxygen and fluorine of content reduced in the dysprosium metal can get a very low level, low oxygen and low fluorine dysprosium metal is prepared, and purity of dysprosium metal prepared is more than 99.9%.