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增刊1 朱万军等:LF精炼对CSP集装箱钢T[O]和夹杂物影响 ·141· 态夹杂转变为液态夹杂,应将[Ca]控制在合适的范 系夹杂物的生成:钙处理对钢中固态夹杂向液态转 围.由图6也可看出,中包[Ca](1823K)也基本满 变具有明显作用. 足生成液态铝酸盐的条件,这可减少或避免固态夹 (3)根据相关热力学数据以及生产数据给出了 杂在浸入式水口内壁聚集而造成水口堵塞. 实际生产钢中生成不同铝酸盐时[Ca]一[Al]平衡的 表4Ca0一A20,熔体中各组分活度值(1873K) 热力学计算模型. Table 4 Activities of compositions in Cao-Al2O3 system 铝酸盐 aco tio 0,0 a钢酸址(计算值) 参考文献 3Ca0Al20 1 0.0065 0.284 [1]Li J F.Development and Production of SPA-H Used in Container by 12Ca07Al20 0.43 0.037 0.0286 BSP [Dissertation].Shenyang:Northeastern University,2006:1 Cao-Al2O3 0.085 0.296 0.769 (李俊峰.集装箱用SPAH耐蚀钢在BSP的开发生产[学位论 文].沈阳:东北大学,2006:1) 2]Tian N Y.Thin Slab Casting and Rolling.Beijing:Metallurgical 么 。钙处厘后 91873K Industry Press,2004 0中包 C,·A 0.-…丁823K (田乃媛.薄板坯连铸连轧.北京:冶金工业出版社,2004) -0 8c4.、 [3]Okuyama G.Yamaguchi K.TakeuchiS,et al.Effect of slag com- position on the kinetics of formation of Al,OMgo inclusions in a- luminum killed ferritic stainless./S/J Int,2000.40(2):121 [4]Lin W,Li H B.Wang X H,et al.Effect of CaO-Al2O3 slag se- 10 ries on total oxygen and sulphur in gear steel 20CrMoH.Spec Steel,2008,29(2):28 (林伟.李海波,王新华,等.Ca0-Al203渣系对20 CrMoH齿轮 10- 0 0.02 0.040.060.080.10 钢中总氧和硫的影响.特殊钢,2008,29(2):28) LAly [5]Yoon B H.Heo K H.Kim JS.et al.Improvement of steel clean- liness by controlling slag composition.Ironmaking Steelmaking. 图6[Ca]-[A1平衡曲线(1873K) 2002,29(3):215 Fig.6 Equilibrium between [Al]and [Ca]at 1873 K [6]Pretorius E B.Oltmann H G.Cassh T.The effective modification of spinel inclusions by Ca treatment in LACK steel.fron steel 4结论 Technol.2010(6):31 [7]Huang X G.Principle of Ferrous Metallurgy.Beijing:Metallurgy (1)适当提高LF精炼渣中(Ca0+MgO)/SiO2 Industry Press,2007 有利于降低钢中T[0],但同时要考虑(Ca0+ (黄希祜.钢铁治金原理.北京:治金工业出版社,2007) MgO)/A山,O的比值;适当增加钙处理前后软吹氩 [8]Ohta H,Suito H.Activities in Ca0-MgO-Al203 slag and deoxida- 时间也可明显改善钢水洁净度. tion equilibria of Al.Mg.Ca.IS/J Int,1996.36(8):983 [9]Cho S W.Suito H.Assessment of caleium-xygen equilibrium in (2)将渣中(Ca0+Mg0)/SiO2和(Ca0+ liquid iron.ISIJ Int,1994.34(3):265 MgO)A山,O,控制在合适范围不仅有利于提高钢水 [10]Ye G,Jonsson P,Lund T.Thermodynamics and kinetics of mod- 洁净度,而且有利于钢中低熔点Ca0-Mg0-AL,0, ification of AlO inclusions.ISI/Int,1996.36(Suppl)S105增刊 1 朱万军等: LF 精炼对 CSP 集装箱钢 T[O]和夹杂物影响 态夹杂转变为液态夹杂,应将[Ca]控制在合适的范 围. 由图 6 也可看出,中包[Ca]( 1 823 K) 也基本满 足生成液态铝酸盐的条件,这可减少或避免固态夹 杂在浸入式水口内壁聚集而造成水口堵塞. 表 4 CaO--Al2O3 熔体中各组分活度值( 1 873 K) Table 4 Activities of compositions in CaO – Al2O3 system 铝酸盐 aCaO [10] aAl 2O3 [10] a铝酸盐 ( 计算值) 3CaO·Al2O3 1 0. 006 5 0. 284 12CaO·7Al2O 0. 43 0. 037 0. 028 6 CaO·Al2O3 0. 085 0. 296 0. 769 图 6 [Ca]--[Al]平衡曲线( 1 873 K) Fig. 6 Equilibrium between [Al]and [Ca]at 1 873 K 4 结论 ( 1) 适当提高 LF 精炼渣中( CaO + MgO) /SiO2 有利于降低钢中 T[O],但同时 要 考 虑 ( CaO + MgO) /Al2O3 的比值; 适当增加钙处理前后软吹氩 时间也可明显改善钢水洁净度. ( 2 ) 将 渣 中 ( CaO + MgO) /SiO2 和 ( CaO + MgO) /Al2O3 控制在合适范围不仅有利于提高钢水 洁净度,而且有利于钢中低熔点 CaO--MgO--Al2O3 系夹杂物的生成; 钙处理对钢中固态夹杂向液态转 变具有明显作用. ( 3) 根据相关热力学数据以及生产数据给出了 实际生产钢中生成不同铝酸盐时[Ca]--[Al]平衡的 热力学计算模型. 参 考 文 献 [1] Li J F. Development and Production of SPA-H Used in Container by BSP[Dissertation]. Shenyang: Northeastern University,2006: 1 ( 李俊峰. 集装箱用 SPA--H 耐蚀钢在 BSP 的开发生产[学位论 文]. 沈阳: 东北大学,2006: 1) [2] Tian N Y. Thin Slab Casting and Rolling. Beijing: Metallurgical Industry Press,2004 ( 田乃媛. 薄板坯连铸连轧. 北京: 冶金工业出版社,2004) [3] Okuyama G,Yamaguchi K,Takeuchi S,et al. Effect of slag com￾position on the kinetics of formation of Al2O3 -MgO inclusions in a￾luminum killed ferritic stainless. ISIJ Int,2000,40( 2) : 121 [4] Lin W,Li H B,Wang X H,et al. Effect of CaO-Al2O3 slag se￾ries on total oxygen and sulphur in gear steel 20CrMoH. Spec Steel,2008,29( 2) : 28 ( 林伟,李海波,王新华,等. CaO--Al2O3 渣系对 20CrMoH 齿轮 钢中总氧和硫的影响. 特殊钢,2008,29( 2) : 28) [5] Yoon B H,Heo K H,Kim J S,et al. Improvement of steel clean￾liness by controlling slag composition. Ironmaking Steelmaking, 2002,29( 3) : 215 [6] Pretorius E B,Oltmann H G,Cassh T. The effective modification of spinel inclusions by Ca treatment in LACK steel. Iron steel Technol,2010( 6) : 31 [7] Huang X G. Principle of Ferrous Metallurgy. Beijing: Metallurgy Industry Press,2007 ( 黄希祜. 钢铁冶金原理. 北京: 冶金工业出版社,2007) [8] Ohta H,Suito H. Activities in CaO-MgO-Al2O3 slag and deoxida￾tion equilibria of Al,Mg,Ca. ISIJ Int,1996,36( 8) : 983 [9] Cho S W,Suito H. Assessment of calcium-oxygen equilibrium in liquid iron. ISIJ Int,1994,34( 3) : 265 [10] Ye G,Jonsson P,Lund T. Thermodynamics and kinetics of mod￾ification of Al2O3 inclusions. ISIJ Int,1996,36( Suppl) : S105 ·141·
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