根据洁净钢的定义,阐明了建立洁净钢制造平台的重要意义,分析对比以铁水"三脱"预处理为基础的洁净钢生产新流程和以炉外精炼为主体的传统流程的技术指标.讨论了传统洁净钢流程中存在的炼钢回硫、低碳脱磷、脱氧与夹杂物控制和强还原精炼等4项基本矛盾,并讨论其对洁净钢生产成本和能耗的影响.在此基础上提出建立高效低成本洁净钢平台应重点研究解决全量铁水"三脱"预处理、少渣冶炼、高碳出钢和真空碳脱氧以及改变夹杂物上浮方式等4项关键技术.
According to the definition of clean steel, a great significance in establishing a clean steel manufacturing platform is clarified. The technical index of new production process of clean steel based on hot metal pretreatment is analyzed and compared with that of traditional process of taking secondary refining as main body. In traditional process, there are four basic contradictions such as resulfurization, dephosphorization in melting low carbon steel, deoxidization and inclusion control, and strong reducing refining, which have an influence on production cost and en-ergy consumption. To solve there problems, a platform for manufacturing high-efficiency and low-cost clean steel should be established. The platform must focus on full hot metal pretreatment, less-slag smelting, high-carbon ta-ping, vacuum carbon deoxidization and change of inclusion floating, and so on.
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