中间合金法制取金属镝工艺研究

研究了中间合金法制取金属镝的工艺，通过对原料质量、还原温度、还原时间、还原剂钙量、升华除钙制度及真空熔铸等条件的优选，得到金属镝直收率８８％，产品适应钕铁硼磁钢使用要求。

铝合金熔炼中的加Zr方法

Ｚｒ是目前铝合金中十分重要的合金化元素之一，对铝合金的许多性能有良好的影响。铝合金熔炼中的加Ｚｒ方法通常有三种：化合物法（Ｋ＿２ＺｒＦ＿６），中间合金法（Ａｌ—Ｚｒ、Ｍｇ—Ｚｒ合金）和晶核播种法（用Ａｌ—Ｚｒ丝材插入流槽熔体内）。现有方法往铝合金熔体中加Ｚｒ各有利弊，必须从实际情况出发进行选择。应该开发Ｚｒ添加剂，若能投入工业性使用，似乎是一种最佳的加Ｚｒ方法。

Preparation of V-Ti-Fe master alloys by metallothermic reduction method

V-Ti-Fe master alloys were prepared by metaUothermic reduction method, and the influences of the mass ratio of V205 to TiO2, Al and Al-Mg alloy addition amounts on the metal recovery rates and alloy compositions were investigated. The results show that appropriate technological parameters are： the mass ratio of V205 to TiO2 is 0.5：1, Al addition represents 95% of the theoretical value, and the Al-Mg alloy addition amount is one third that of the Al addition. The results from energy spectrum analysis show that V and Fe distribute uniformly in the prepared alloy, while the segregation for Ti, i.e. Ti-rich phase is detected. A spray refming process was carried out to reduce the impurity contents of Al and O in the prepared alloys. The Al content drops from 4.27% to 1.86%, and the O content drops from 2.10% to 0.91% after the refining process.

金属镝制备工业试验通过鉴定

北京有色金属研究总院在中间合金法制备金属镝的工艺研究基础上,于1989年进行了该法制备金属镝的工业试验,已通过部级技术鉴定,并获有色金属科技进步三等奖。该工业试验研究确定了生产金属摘的工艺条件,设计出了工业生产设备,解决了氟化氢气体导管和料斗结构、延长了炉体使用寿命,解决了还原护。