【作者】 王瑞敏； 张延玲； 李显鹏；

【Author】 Wang Ruimin;Zhang Yanling;Li Xianpeng;State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing;

【机构】 北京科技大学钢铁冶金新技术国家重点实验室；

【摘要】 本文主要通过赤泥和Ca O按照一定比例调配作为脱磷剂应用于炼钢过程,借助热力学软件Fact Sage研究加入Na2O、Al2O3的Ca O-Fe O-Si O2渣系在不同温度液相区面积的变化,最后根据之前的脱磷实验研究结果,将赤泥应用于吹氧炼钢过程。实验结果表明:根据相图观察得到,在典型炼钢过程的Ca O-Si O2-Fe O渣系,加入Al2O3、Na2O会引起渣系在不同温度下液相区面积的增加,因而会降低渣的熔点。拜耳法赤泥和Ca O混合用作脱磷剂具有良好的脱磷效果和较低的熔点。当赤泥与氧化钙质量比为1.5左右,渣铁比为20%,初始硅为0时,脱磷率可达80%以上。根据之前实验得到的结论,将赤泥用作吹氧炼钢过程脱磷剂也取得了很好的效果,当满足脱磷条件[%Si]始=0时,温度控制在1350℃左右,脱磷均取得很好的效果(脱磷率可以达到85%)。更多还原

【Abstract】 In this paper, red mud and Ca O mixed according to a certain proportion were used in steelmaking process as dephosphorizing agent, and the liquid phase region changes of Ca O-Fe O-Si O2 slag with Na2 O and Al2O3 added at different temperatures were studied by using the thermodynamic software Fact Sage, finally according to the previous dephosphorization results, the red mud were applied to oxygen steelmaking process. The experimental results showed that, the observation of phase diagram showed that, the liquid phase regions of the Ca O-Si O2-Fe O slag system in the typical BOF steelmaking process can be increased with the addition of Al2O3 and Na2 O, thus the melting point of slag was decreased. The Bayer red mud and Ca O mixed as dephosphorizing agent has good dephosphorization effects and lower melting point. When the mass ratio of red mud and calcium oxide was about 1.5, the ratio of slag and iron was 20% and the initial silicon was 0, the dephosphorization rate was more than 80%. According to previous results, the red mud used for oxygen steelmaking process dephosphorizer also achieved good results. When the initial [%Si] was 0 and temperature controlled was about 1350℃, dephosphorization were obtained good effects( the dephosphorization rate can reach 85%).更多还原