氧化钼直接合金化钼收得率影响因素分析  

Analysis of Influence Factors for Mo Yield During the Direct Alloying of Molybdenum Oxides

作　　者：沈航[1] 朱航宇[1] 杨高[1] 潘志立[1] 李吉康 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《热加工工艺》2016年第15期68-71,共4页Hot Working Technology

基　　金：湖北省自然科学基金(2015CFC838)

摘　　要：采用氧化钼代替钼铁冶炼含钼合金钢,在成本、节能及环保方面具有优势。本文利用热力学计算及实验相结合的方法,对三氧化钼在钢液中的还原行为进行了研究,重点考察了还原剂、抑制剂、加料方式等因素对Mo收得率的影响。结果表明:在无还原剂存在时,钢液中的[Fe]能还原MoO_3,Al、Si、C、Fe的还原效果依次递减;Ca O和CaCO_3能有效抑制MoO_3的挥发,从而提高Mo的收得率;当使用CaMoO_4进行合金化时,Mo的收得率可达98%以上;氧化钼直接合金化工业实验表明,Mo收得率稍高于传统的钼铁合金化,经VD真空处理后,[N]、[O]、[H]含量均达到工艺要求。Alloying steel with Mo can be smelt with molybdenum trioxide instead of ferromolybdenum, which has advantage in costs, energy saving and environmental protection. The reduction behavior of molybdenum trioxide in molten steel and the methods to prevent volatilization of molybdenum trioxide were investigated, by combining thermodynamics calculation with experimental reseach. Molybdenum yield was measured after the reduction experiment for direct alloying with molybdenum trioxide. The results show that the activity of reducing agents toward the MoO3 reduction reaction decreases in the following order： Al, Si, C and Fe. The volatilization of MoO3 can be effectively inhibited by mixing CaO and CaCO3. Moreover, the molybdenum yield could be up to 98% by using CaMoO4 as precursor materials for molybdenum alloying. The industry experiments for direct alloying of molybdenum trioxide show that the yield of Mo is higher than by using ferromolybdenum, and after VD treatment, the contents of [N], [O], [H] meet the process requirements.

关 键 词：Mo收得率 三氧化钼 挥发 直接合金化 

分 类 号：TF70[冶金工程—钢铁冶金]