学术
铝脱氧钢中尖晶石夹杂物的生成与转变
李海波[1] 林伟[1] 王新华[1] 陈天明[2] 杨素波[2]
[1]北京科技大学冶金与生态工程学院,北京100083 [2]攀枝花钢铁（集团）公司,攀枝花617067
摘 要:
研究了140t LD-LF-RH-CC流程冶炼超低氧钢时精炼过程铝脱氧钢中夹杂物的变化。试验钢出钢过程加足够的铝脱氧，以尽快降低钢液中溶解氧。为使Al2O3转变为钙铝酸盐夹杂，选用CaO·Al2O3精炼渣系，渣中含3．00％-8．42％SiO2。结果表明，精炼时钢液中夹杂物的变化趋势为：纯Al2O3→尖晶石夹杂→CaO-Al2O3·MgO复合夹杂物，炉渣中8．42％SiO2炉次夹杂物转变慢于3．00％SiO2炉次；当炉渣CaO／Al2O3为1．60时，钢中夹杂物大多转变为低熔点CaO-Al2O3-MgO复合夹杂。精炼渣的成分控制应为（％）：55-60CaO，35-40Al2O3，5-10MgO。[著者文摘]
文章出处:
《特殊钢》-2007年28卷4期 -30-32页
栏目信息:
分 类 号:
Formation and Transformation of Spinel inclusion in Aluminium Killed Steel
Li Haibo , Lin Wei , Wang Xinhua ,Chen Tianming , Yang Subo（ 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ; 2 Panzhihua Iron and Steel Group Co, Panzhihua 617067 ）
Abstract:
The formation and transformation of inclusion in aluminium killed steel during refining have been studied with extra low oxygen steel steelmaking by 140 t LD - LF - RH - CC flow sheet. A sufficient of aluminium was added in test steel during tapping in order to as soon as decrease solution oxygen in liquid steel, and CaO-Al2O3 refining slag series containing 3.00% - 8.42% SiO2 were selected for Al2O3 transforming to calcium aluminate inclusion. Test results showed that the transformation trend of inclusion in liquid steel during secondary refining was pure Al2O3→spinel→CaO-Al2O3→MgO complex inclusions, the transformation of inclusion in heat with slag containing 8.42% SiO2 was slower than that in heat with slag containing 3.00% SiO2, and as CaO/Al2O3 of refining slag was 1.60, most inclusions in steel transformed to low melting point CaO-Al2O3-MgO complex inclusions. The available ingredient of ladle refining slag is 55% -60% CaO, 35%-40% Al2O3, 5%- 10% MgO.[著者文摘]
Key words:
Extra Low Oxygen Steel, Inclusion, Refining Slag
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