钙和硫对VD真空脱气精炼过程夹杂物去除的影响

炼钢 ›› 2024, Vol. 40 ›› Issue (2): 51-56.

钙和硫对VD真空脱气精炼过程夹杂物去除的影响

刘建勋¹，高小勇1，卫红²，张立峰³

1．燕山大学机械工程学院，河北秦皇岛 066004；
2．燕山大学材料科学与工程学院，河北秦皇岛 066004；
3．北方工业大学机械与材料工程学院，北京 100114

出版日期:2024-04-05 发布日期:2024-04-03

Effect of Ca and S on inclusion removal during vacuum degassing refining process

Online:2024-04-05 Published:2024-04-03

摘要/Abstract

摘要： 研究了Ca和S元素对VD真空精炼过程夹杂物去除的作用。Ca含量对夹杂物的去除作用很大，当钢水w(S)=0.012 %～0.014 %时，低Ca含量有利于夹杂物的去除。钢水w(Ca)=1×10^-6时，夹杂物去除率为74.30 %；钢水w(Ca)=8×10^-6时，夹杂物去除率显著降低至33.95 %。原因是Ca元素使得钢液中固态脱氧产物Al₂O₃-MgO夹杂物转变为液态的钙铝酸盐类夹杂物，不容易上浮去除。当钢水w(Ca)相同时（(7～8)×10^-6），高S含量有利于夹杂物的去除。钢水w(S)为135×10^-6和11×10^-6时，对应的夹杂物去除率分别为33.95 %和23.71 %，原因是高S含量使得夹杂物中的CaS含量增加，从而提高夹杂物熔点。讨论了Ca和S元素的来源，并提出了提高VD过程夹杂物去除率的措施。

关键词: 真空脱气精炼, 夹杂物, 去除率, 硫含量, 钙含量 ,

Abstract: The effect of Ca and S on inclusion removal during vacuum degassing refining process was investigated. The Ca content had a significant effect on inclusion removal. When the S mass fraction was in the range of 0.012 %－0.014 %, low Ca content was beneficial for inclusion removal. When the Ca mass fraction was 1×10^-6in steel, the inclusion removal rate was 74.30 %. When the Ca mass fraction was 8×10^-6 in steel, however, the inclusion removal rate decreased drastically to 33.95 %. The reason was that the Ca element transferred the solid deoxidation product Al₂O₃-MgO inclusions to liquid calcium aluminate inclusions which were not easy to float and remove. When the Ca mass fraction was (7-8)×10^-6 in steel, high S content was beneficial for inclusion removal. When the S mass fraction was 135×10^-6 and 11×10^-6 in steel, the corresponding inclusion removal ratios were 33.95 % and 23.71 %, respectively. The reason was that high S content increased the CaS content in the inclusions, which made the melting point of inclusions increased. The sources of Ca and S elements were discussed, and measures were proposed to improve the inclusion removal ratio during vacuum degassing refining process.

Key words: vacuum degassing refining, inclusion, remove ratio, sulfur content, calcium content

刘建勋, 高小勇, 卫红, 张立峰. 钙和硫对VD真空脱气精炼过程夹杂物去除的影响[J]. 炼钢, 2024, 40(2): 51-56.

[1]	王亮, 杨健, 张同生, 张银辉. 超低碳IF钢冶炼过程炉渣对夹杂物控制研究进展[J]. 炼钢, 2024, 40(2): 1-22.
[2]	李阳, 胡显堂, 石树东, 闫占辉, 杨赵军, 谢翠红. LF+VD工艺生产X70管线钢洁净度研究[J]. 炼钢, 2024, 40(2): 57-64.
[3]	邢飞, 朱苗勇, 郑淑国. 采用气幕挡墙感应加热中间包的模拟研究[J]. 炼钢, 2024, 40(2): 65-71.
[4]	翟万里, 印传磊, 赵余龙, 许正周. 炉渣碱度对VD处理钢洁净度的影响[J]. 炼钢, 2024, 40(1): 32-38.
[5]	屠兴圹, 苏振伟, 周淼, 赵赟. 钢包氩气流量对冷镦钢SWRCH35K中DS夹杂物的影响#br#[J]. 炼钢, 2024, 40(1): 52-58.
[6]	于会香, 霍文聪, 邱光元, 郝丽霞, 刘春阳. 铝脱氧钢中Al₂O₃夹杂物与Al₂O₃-C质水口耐材的粘附机理研究[J]. 炼钢, 2024, 40(1): 59-67.
[7]	王博, 李书恒, 王杏娟, 朱立光, 黄伟丽, 牛跃威, . 渣洗工艺对低碳钛微合金钢洁净度及性能的影响[J]. 炼钢, 2023, 39(6): 47-52.
[8]	苗志奇, 成国光, 李世健, 任振海, 徐必靖. 37Mn5钢精炼过程大尺寸Al₂O₃-SiO₂-MnO类夹杂物形成与演变机理[J]. 炼钢, 2023, 39(6): 53-58.
[9]	龙云贺, 郑淑国, 朱苗勇. 中间包感应加热与吹氩协同控制工艺数值模拟[J]. 炼钢, 2023, 39(6): 59-67.
[10]	张惠荣, 郑万, 刘鹏, 张文文, 李光强, 刘静, . 稀土及热处理对GCr15轴承钢中夹杂物特征的影响[J]. 炼钢, 2023, 39(6): 74-83.
[11]	沈平, 伦明睿, 张丽琴, 曹晨巍, 郑庆, 付建勋. 电池壳钢夹杂物分析及冲压开裂缺陷解决措施[J]. 炼钢, 2023, 39(6): 84-91.
[12]	陈粤, 成国光, 张涛, 张友祺, 龙鹄, 郭俊宇 . 45钢中CaO-SiO₂-Al₂O₃-MgO系夹杂物的塑性化控制[J]. 炼钢, 2023, 39(5): 82-89.
[13]	刘洪波, 康举, 谢荣圆, 康旭. 钢中硫化锰夹杂控制的机理分析与工业实践[J]. 炼钢, 2023, 39(4): 1-12.
[14]	全齐, 屈天鹏, 秦俊山, 陈刚, 王德永, 田俊, 李向龙. 连铸中间包内流体运动形态模型分析研究[J]. 炼钢, 2023, 39(4): 37-47.
[15]	朱李艳, 赵雯雯. 非稳态浇铸下提升引流砂去除率的模拟研究[J]. 炼钢, 2023, 39(4): 55-61.