摘要
针对用铝热还原法生产高钛铁中的O残留量高和难以脱除的问题,通过系统地观察O在高钛铁中的微观组织结构,确定了O在高钛铁中的存在形态.分析了含氧相的形成机理,并对铝热还原法制备高钛铁的热力学过程进行了分析.提出采用铝热还原一精炼法制备低氧高钛铁的新方法.分析结果表明,O以Al_2O-3,Fe_2TiO_4,TiO_2,Ti_2O,钛氧固溶体等复杂形态存在,熔炼时难以去除,是高钛铁中O含量高的主要原因.采用铝热还原-精炼法制备高钛铁,加入适当的添加剂组成复配渣,所制合金由FeTi_2,FeTi,AlFe,Ti_4Fe_2O等相组成,氧化物夹杂相得到有效去除,使合金中O含量大大降低.采用该方法制备的高钛铁能够满足要求.
To the problems that residual oxygen content is high and deoxidizing difficult in the production process of high ferrotitanium by adopting aluminothermic deoxidization method,through observing the microstructures of oxygen element in high ferrotitanium by the numbers,the conformation of oxygen element in high ferrotitanium is determined.The forming mechanism of oxygen-containing phases and thermodynamic process of producing high ferrotitanium by aluminothermic deoxidization method are analyzed.A new way of ...
出处
《过程工程学报》
CAS
CSCD
北大核心
2008年第S1期176-180,共5页
The Chinese Journal of Process Engineering
关键词
高钛铁
含氧相
铝热还原
精炼
high ferrotitanium
oxygen-containing phase
aluminothermic deoxidization
refining
