炼钢 ›› 2014, Vol. 30 ›› Issue (6): 46-49.
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摘要: 对武汉钢铁股份有限公司条材总厂“BOF→LF→CSP”工艺生产SPA-H钢2个炉次的LF精炼过程进行了系统取样,并利用Aspex自动扫描电子显微镜分析统计了钢中夹杂物的成分、尺寸、面积和数量。研究发现,当钢-渣反应和钢-炉衬反应达到平衡时夹杂物在CaO-Al2O3-MgO三元系相图中呈直线分布,通过对比2个炉次钢中夹杂物的转变,说明控制精炼渣成分和精炼时间,可以使部分Al2O3夹杂物进入CaO-Al2O3-MgO三元系低熔点区,并且在软吹过程中能够获得较好的夹杂物去除效果。
关键词: SPA-H钢, 软吹, LF, 夹杂物
Abstract: The behavior of non-metallic inclusions in SPA-H steel produced by BOF→LF→CSP production route of WISCO during LF refining was investigated. Molten steel samples, slag samples were taken from two industrial heats systematically, and the compositions, size distribution and number of inclusions were analyzed using Aspex explorer. The results showed that, the distributions of inclusion compositions in CaO-Al2O3-MgO ternary phase diagram were like straight lines when the interface reactions equilibrium of slag/metal and refractories/metal were attained. Comparing the inclusions transformation of the two industrial heats, by controlling the composition of slag and refining time, a part of the Al2O3 inclusions could be transformed into lowmelting CaO-Al2O3-MgO inclusions,which were eliminated readily during argon gas light bubbling.
Key words: SPA-H steel, argon gas light bubbling, LF, inclusion
秦颐鸣1,姜 敏1,王新华1,郝 鑫1,钱 龙2. SPA-H钢LF精炼过程非金属夹杂物行为研究[J]. 炼钢, 2014, 30(6): 46-49.
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http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/Y2014/V30/I6/46