转炉渣中磷的微观结构行为

doi:10.12068/j.issn.1005-3026.2021.05.006

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (5): 646-651.DOI: 10.12068/j.issn.1005-3026.2021.05.006

转炉渣中磷的微观结构行为

张蕊^1,2，贾吉祥³，刘承军^1,2，闵义^1,2,3

(1. 东北大学多金属共生矿生态化冶金教育部重点实验室，辽宁沈阳110819; 2. 东北大学冶金学院，辽宁沈阳110819; 3. 海洋装备用金属材料及其应用国家重点实验室，辽宁鞍山114021)

修回日期:2020-08-31 接受日期:2020-08-31 发布日期:2021-05-20
通讯作者: 张蕊
作者简介:张蕊(1992-)，女，天津人，东北大学博士研究生；刘承军(1974-)，男，河南获嘉人，东北大学教授，博士生导师; 闵义(1972-)，男，辽宁海城人，东北大学教授，博士生导师.
基金资助:
基金项目；(半空) 基金项目.国家重点研发计划项目(2017YFC0805100); 国家自然科学基金资助项目(51974075，51674069); 海洋装备用金属材料及其应用国家重点实验室开放基金资助项目(SKLMEA-K201911); 中央高校基本科研业务费专项资金资助项目(N182506001).

Microstructure Behaviors of Phosphorus in Converter Slag

ZHANG Rui^1,2， JIA Ji-xiang³， LIU Cheng-jun^1,2， MIN Yi^1,2,3

1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. School of Metallurgy， Northeastern University， Shenyang 110819， China; 3. State Key Laboratory of Metal Material for Marine Equipment and Application， Anshan 114021， China.

Revised:2020-08-31 Accepted:2020-08-31 Published:2021-05-20
Contact: MIN Yi
About author:-
Supported by:
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摘要/Abstract

摘要： 为了设计合理的转炉渣成分以达到满意的脱磷效果，根据转炉炼钢过程熔渣成分的变化范围，采用拉曼光谱测定了CaO-SiO₂-Fe_○xO-P₂O₅系熔渣的熔体结构，并解析了磷在熔渣中的存在形式及转变行为.结果表明，熔渣中磷主要以桥氧数为0，1，2的磷氧四面体结构单元存在，并可进入硅氧四面体和铁氧四面体形成Si—O—P和Fe—O—P键.随着渣中CaO和FeO总量的增加，熔渣中聚合程度较低的Q⁰(P)，Q¹(P)和Q⁰(Si)，Q¹(Si)摩尔分数升高，而聚合程度较高的Q²(P)和Q²(Si)，Q³(Si)摩尔分数降低.另外，Fe—O—P和Si—O—P键的含量也逐渐降低，当碱度为2.83时，Si—O—P和Fe—O—P键消失.

关键词: 转炉渣;拉曼光谱;熔体结构;转变行为;磷

Abstract: To design a reasonal composition of converter slag and achieve a satisfactory dephosphorization ratio， the structures of CaO-SiO₂-Fe_○xO-P₂O₅ molten slags were examined by Raman spectroscopy， and the existence form and transformation behavior of phosphorus were further analyzed in terms of the variation of slag composition during the process of basic oxygen steelmaking. The results show that phosphorus in molten slags mainly exists in the forms of Q⁰(P)， Q¹(P) and Q²(P). Meanwhile， phosphorus can enter the silica tetrahedron and ferrite tetrahedron， and occupy the locations of silicon and iron to form the Si—O—P and Fe—O—P bonds， respectively. With the increasing total content of CaO and FeO， the molar fractions of the Q⁰(P)， Q¹(P)， Q⁰(Si) and Q¹(Si) with lower-degree polymerization increase， while the molar fractions of Q²(P)， Q²(Si) and Q³(Si) with higher-degree one decrease. In addition， Si—O—P and Fe—O—P bonds also gradually decrease. The Si—O—P and Fe—O—P bonds disappear， when the basicity of molten slag was 2.83.

Key words: converter slag; Raman spectra; melt structure; transformation behavior; phosphorus

中图分类号:

TF721

张蕊，贾吉祥，刘承军，闵义. 转炉渣中磷的微观结构行为[J]. 东北大学学报（自然科学版）, 2021, 42(5): 646-651.

ZHANG Rui， JIA Ji-xiang， LIU Cheng-jun， MIN Yi. Microstructure Behaviors of Phosphorus in Converter Slag[J]. Journal of Northeastern University(Natural Science), 2021, 42(5): 646-651.

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转炉渣中磷的微观结构行为

Microstructure Behaviors of Phosphorus in Converter Slag

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