Thermodynamic analysis for developing W-Mo complex alloy by using low quality tungsten molybdenum ore
LUO Lin-gen1， 2，WANG Lei1,3，GUO Pei-min1，ZHAO Zhi-min1，LIN Yin-he4，LI Zheng-bang2
（1. Center of Efficient Utilization of Resources by Low-Temperature Metallurgy， China Iron and Steel Research Institute Group， Beijing 100081， China 2. Metallurgical Technology Institute， Central Iron and Steel Research Institute， Beijing 100081， China 3. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China 4. Panzhihua Iron and Steel Research Institute， Pangang Group， Research Institute Co.， Ltd.， Panzhihua 617000， Sichuan， China）
Abstract：An effective method for comprehensive and high-efficient utilization of low-quality tungsten and molybdenum ore is developed to obtain composite alloy of tungsten and molybdenum. The thermodynamics of reduction reactions of the ores were calculated with different reducing agents： C＋SiO2， Si， SiC， and CaC2. The starting temperatures of reduction reactions are 1 552，1 403，1 613 and 2 002 K， respectively. Calcium fluophosphate Ca5(PO4)3F is the most difficult component in the ore to be reduced in the reduction process because of its compact structure and large bond energy. Thus the key to develop high quality composite alloy of tungsten and molybdenum is reducing the content of impurity elements P， F.
2015, Vol. 50 
