工程科学学报，第39卷，第12期：1822-1827,2017年12月 Chinese Journal of Engineering,Vol.39,No.12:1822-1827,December 2017 D0l:10.13374/j.issn2095-9389.2017.12.007:http://journals..ustb.edu.cn FeV50合金浇铸沉降理论的应用及其影响因素 余 彬四，周恒2)，孙朝晖”，王莹2》，陈海军) 1)攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室，攀枝花6170002)北京科技大学治金与生态工程学院，北京100083 ☒通信作者，E-mail:525159476@qg.com 摘要采用近似无限大流体重力沉降原理分析了多期法FV50合金浇铸过程渣金分离及浇铸渣层钒的分布规律，考察了 熔渣黏度、沉降粒度、浇铸温度、渣层厚度以及保温制度对渣中钒含量的影响.结果表明，浇铸渣中钒的赋存形式除了未还原 完全的钒氧化物之外，还存在部分未完全沉降的初级合金：合金沉降速度随合金粒度的增加而增大，随熔渣黏度的增加而减 小.1850℃条件下，当渣层厚度为50mm,熔渣组分质量分数为65.2%A03、15.5%C0、14.6%Mg0、1.9%Fe03、0.9% Si02时，粒径为100μm的合金沉降时间及熔渣上浮时间分别为24.9和1.2min.基于此，进行浇铸工艺优化试验，在渣层厚 度35mm,浇铸温度1900℃、熔渣主要成分质量分数AL0,60%~65%、C015%~20%、Mg09%-15%、浇铸锭模保温层厚 度9cm的条件下，浇铸渣中平均TV质量分数由1.39%降低至0.58%. 关键词FeVS0:合金沉降；浇铸：斯托克斯定律：熔渣 分类号TF841.3 Theoretical application and factors influencing casting settlement of Fev50 alloy YU Bin,ZHOU Heng?,SUN Zhao-hui,WANG Ying2),CHEN Hai-jun") 1)State Key Laboratory of V and Ti Resources Comprehensive Utilization,Panzhihua Iron and Steel Group Research Institute Co.,Panzhihua 617000, China 2)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:525159476@qq.com ABSTRACT The process of separation of slag and alloy and distribution of vanadium in casting slag during the casting process of multiperiod FeV50 preparation were analyzed using the principle of infinite fluid gravitational settling.The effects of slag viscosity, particle size,casting temperature,molten-slag thickness,and insulation system on total vanadium (TV)content in slag were investi- gated.The analysis demonstrates that vanadium mainly comprises vanadium oxide and incompletely deposited primary ferrovanadium alloy in the casting slag.The sedimentation rate of settlement alloy increases with an increase in the particle size and decreases with an increase in the slag viscosity.The dropping time of FeV50 alloy and floating time of molten slag is 24.9 and 1.2 min,respectively, when the casting conditions are as follows-casting temperature:1850 C,slag layer thickness:50 mm,particle size:100 um,and slag composition mass fraction:65.2%Al2O:,15.5%Ca0,14.6%Mgo,1.9%Fe2O3,and 0.9%SiO2.Through optimization ex- periments,the average vanadium mass content in the slag is reduced from 1.39%to0.58%for the following casting conditions-slag layer thickness:35 mm,casting temperature:1900 C,slag component:60%-65%Al2O3,15%-20%Ca0,9%-15%Mgo:and casting insulation thickness:9 cm. KEY WORDS FeV50;alloy settlement:casting:Stokes law:molten slag 钒铁作为治金工业应用最为广泛的含钒中间合金产品，它能与钢中碳、氮形成细小弥散的碳氮化物，起 收稿日期：2017-0301 基金项目：国家自然科学基金资助项目(51505046)工程科学学报，第 39 卷，第 12 期: 1822--1827，2017 年 12 月 Chinese Journal of Engineering，Vol． 39，No． 12: 1822--1827，December 2017 DOI: 10． 13374 /j． issn2095--9389． 2017． 12． 007; http: / /journals． ustb． edu． cn FeV50 合金浇铸沉降理论的应用及其影响因素 余 彬1) ，周 恒2) ，孙朝晖1) ，王 莹1，2) ，陈海军1) 1) 攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室，攀枝花 617000 2) 北京科技大学冶金与生态工程学院，北京 100083 通信作者，E-mail: 525159476@ qq． com 摘 要 采用近似无限大流体重力沉降原理分析了多期法 FeV50 合金浇铸过程渣金分离及浇铸渣层钒的分布规律，考察了 熔渣黏度、沉降粒度、浇铸温度、渣层厚度以及保温制度对渣中钒含量的影响． 结果表明，浇铸渣中钒的赋存形式除了未还原 完全的钒氧化物之外，还存在部分未完全沉降的初级合金; 合金沉降速度随合金粒度的增加而增大，随熔渣黏度的增加而减 小． 1850 ℃条件下，当渣层厚度为 50 mm，熔渣组分质量分数为 65. 2% Al2O3、15. 5% CaO、14. 6% MgO、1. 9% Fe2O3、0. 9% SiO2 时，粒径为 100 μm 的合金沉降时间及熔渣上浮时间分别为 24. 9 和 1. 2 min． 基于此，进行浇铸工艺优化试验，在渣层厚 度 35 mm，浇铸温度 1900 ℃、熔渣主要成分质量分数 Al2O3 60% ～ 65% 、CaO 15% ～ 20% 、MgO 9% ～ 15% 、浇铸锭模保温层厚 度 9 cm 的条件下，浇铸渣中平均 TV 质量分数由 1. 39% 降低至 0. 58% ． 关键词 FeV50; 合金沉降; 浇铸; 斯托克斯定律; 熔渣 分类号 TF841. 3 Theoretical application and factors influencing casting settlement of FeV50 alloy YU Bin1)  ，ZHOU Heng2) ，SUN Zhao-hui1) ，WANG Ying1，2) ，CHEN Hai-jun1) 1) State Key Laboratory of V and Ti Ｒesources Comprehensive Utilization，Panzhihua Iron and Steel Group Ｒesearch Institute Co． ，Panzhihua 617000， China 2) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China Corresponding author，E-mail: 525159476@ qq． com ABSTＲACT The process of separation of slag and alloy and distribution of vanadium in casting slag during the casting process of multiperiod FeV50 preparation were analyzed using the principle of infinite fluid gravitational settling． The effects of slag viscosity， particle size，casting temperature，molten-slag thickness，and insulation system on total vanadium ( TV) content in slag were investi￾gated． The analysis demonstrates that vanadium mainly comprises vanadium oxide and incompletely deposited primary ferrovanadium alloy in the casting slag． The sedimentation rate of settlement alloy increases with an increase in the particle size and decreases with an increase in the slag viscosity． The dropping time of FeV50 alloy and floating time of molten slag is 24. 9 and 1. 2 min，respectively， when the casting conditions are as follows—casting temperature: 1850 ℃，slag layer thickness: 50 mm，particle size: 100 μm，and slag composition mass fraction: 65. 2% Al2O3，15. 5% CaO，14. 6% MgO，1. 9% Fe2O3，and 0. 9% SiO2 ． Through optimization ex￾periments，the average vanadium mass content in the slag is reduced from 1. 39% to 0. 58% for the following casting conditions—slag layer thickness: 35 mm，casting temperature: 1900 ℃，slag component: 60% --65% Al2O3，15% --20% CaO，9% --15% MgO; and casting insulation thickness: 9 cm． KEY WOＲDS FeV50; alloy settlement; casting; Stokes law; molten slag 收稿日期: 2017--03--01 基金项目: 国家自然科学基金资助项目( 51505046) 钒铁作为冶金工业应用最为广泛的含钒中间合金 产品，它能与钢中碳、氮形成细小弥散的碳氮化物，起