酸性氧化物对转炉钢渣的改性作用  

Modification of converter slag with acidic oxides

作　　者：黄世烁 郭敏[1] 张梅[1] 

机构地区：[1]北京科技大学冶金生态工程学院,北京100083

出　　处：《钢铁研究学报》2015年第11期38-42,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51372019,51074009,50874013);国家科技支撑计划资助项目(2013BAC14B07)

摘　　要：分别研究了酸性氧化物SiO2、B2O3、P2O5对转炉钢渣中f-CaO的消解作用。实验结果表明,当SiO2、B2O3、P2O5掺加量与f-CaO摩尔质量比均为1∶3时,钢渣中f-CaO的质量分数由4.27%降低到0.5%以下。即SiO2、B2O3、P2O5可有效降低钢渣中f-CaO含量,提高其体积安定性。通过对改性钢渣的矿物相组成和微观形貌进行分析可知,改性剂不仅固定了钢渣中的f-CaO,还夺取了铁酸二钙中的CaO,生成了更多的C2S。通过对转炉钢渣进行改性,制备得到了低f-CaO、低铁酸二钙和高硅酸二钙的改性钢渣,由此更有利于其在水泥熟料中的应用。The acidic oxides of analytical reagents such as SiO2 , B2O3 , P2O5 were used as modifier to fix f-CaO in the converter slag in this paper, respectively. The experimental results show that, the mass fraction of f CaO in cover＊er slag decreases from 4.27% to less than 0.5% when the mass ratio of acidic oxide to f-CaO is fixed at 1： 3. It means that acidic oxides such as SiO2, B2o3 , P2O5 can reduce the content of f-CaO significantly, leading to the stability of modified converter slag improved. According to the analysis results of minera] phases and micro slructural aspects of the modified slag, it is indicated that the modifier can not only fix f CaO in the converter slag, but also capture the CaO of C2F, resulting in the content of C2S in the prepared modified converter slag increased. Low f CaO, low C2F and high CeS slag was generated by adding modifier into converter slag, which was benefit for the modified converter slag used in the field of cement.

关 键 词：转炉钢渣 改性 f-C AO 安定性 

分 类 号：TF713.3[冶金工程—钢铁冶金]