Niobium Extraction from Baotou Iron Ore Containing Niobium

作     者：周渝生 杨天钧 孟涛 范鹏 董一诚 何旭初 

作者机构：University of Science and Technology BeijingBeijing 100083China Hunan Institute of Metallurgy and MaterialsChangsha 410014China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：1992年第11卷第3期

页      面：221-227页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Niobium Extraction metallurgy Nb alloy Nb recovery 

摘      要：The experimental results of niobium enrichment in laboratory and in blast furnace in Baotou Iron and Steel Corporation were reported.The effects of temperature,constituents of slag and silicon content in hot metal on niobium recovery were studied and the results have been verified by blast furnace operation.Optical and electronic microscopy and EPMA was observed that at the metal-slag interface there is NbC deposit layer obstructed Nb entering into the metal,By raising the temperature of hearth and agitating the bath,the reduc- tion of niobium oxide in slag could be speeded up,the solubility of Nb in hot metal could increase and the deposited NbC layer became thinner and even disappeared,in result,Nb recovery was increased.A compre- hensive extraction process combining ore dressing with pyro-hydro-metallurgy was suggested for Baotou niobium resource which was difficult to be concentrated formerly.The methods of increasing niobium recovery were also suggested.