Investigation on Non-Metallic Inclusions in LCAK Steel Produced by BOF-LF-FTSC Production Route |
| |
Authors: | YANG Wen CAO Jing WANG Xin-hua XU Zhi-rong YANG Jie |
| |
Affiliation: | No. 1 Steelmaking Plant, Tangshan Iron and Steel Co Ltd, Tangshan 063000, Hebei, China |
| |
Abstract: | The behavior of non-metallic inclusions in LCAK (low carbon aluminum killed) steel produced by BOF (basic oxygen furnace)-LF (ladle furnace) refining-FTSC (flexible thin slab continuous caster) production route was investigated. The results showed that, LF refining for LCAK steel could decrease the wTO] significantly, and the inclusions were modified by Ca treatment, which prevented nozzle clogging efficiently. However, owing to the unstable casting condition in the earlier stage of casting, a severe reoxidation occurred, accompanied with mold slag entrapment. The transformation of non-metallic inclusions during the steelmaking process was Al2O3→MgO-Al2O3 type inclusion→MgO-Al2O3-CaO type inclusion with a CaS ring, and the mechanism of the transformation was proposed and discussed via thermodynamic and kinetic analysis. Besides, to avoid CaS precipitation, the product of w2Al]×w3S] in steel should be less than 2.0×10-10 at 1873 K, which remands higher desulfurization ratio during LF refining. |
| |
Keywords: | LCAK steell ladle refining FTSC non-metallic inclusion |
本文献已被 维普 万方数据 等数据库收录! |
| 点击此处可从《钢铁研究学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《钢铁研究学报(英文版)》下载全文 |
|