摘要
利用热力学方法,针对铁液中铁水深脱硫条件所需要的低氧含量,研究了Al-C-O平衡时铁溶液中氧含量的变化规律.通过对C、Al及Al-C复合脱氧反应脱氧常数的比较得出,在1573K温度下,铁液中用Al-C复合脱氧,其脱氧能力比单独使用C脱氧能力强.用热力学理论得出1573K温度下铁液中用Al-C复合脱氧的平衡曲线.研究表明:在温度一定时,随着C的活度aC的增大,Al-C复合脱氧能力逐渐增强;在aC一定的情况下,随着温度的升高,Al-C复合脱氧能力逐渐减弱.
In order to meet the need of low oxygen content under the deep desulfurization conditions of hot metal,the variation of oxygen content in hot metal was studied by the thermodynamic method when the Al-C-O equilibrium reached.Compared the deoxidation constants of the C or Al single deoxidizer with the Al-C complex deoxidizer,it is found that at 1 573K the deoxidation ability of Al-C complex deoxidation is stronger than that of C deoxidation during hot metal pretreatment.The equilibrium curve of Al-C complex deoxidation at 1 573K can be drawn by using the thermodynamic theory.If the temperature is constant,the deoxidation ability of Al-C complex deoxidation increases with the carbon activity aC increasing;but if aC is constant,the deoxidation ability of Al-C complex deoxidation lowers as the temperatures rises.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第10期1115-1122,共8页
Journal of University of Science and Technology Beijing
关键词
炼铁
脱氧
脱氧剂
活度系数
热力学
ironmaking
deoxidation
deoxidants
activity coefficients
thermodynamics
