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高纯净度钢的生产是21世纪钢铁企业面临的重大课题,对钢中全氧含量和夹杂物含量的控制是生产高纯净IF钢的关键技术。为此笔者提出一种全新的夹杂物控制技术——反应诱发微小异相去除钢液中细小夹杂物的工艺,设计了一种具有该种功能的复合球体,并开展了工业现场试验研究。试验结果表明:反应诱发微小异相去除细小夹杂物工艺是一种成本低、效率高、简便易行的夹杂物控制技术,它可以显著降低IF钢中非金属夹杂物数量。与传统工艺相比,采用该技术对钢液进行处理后,铸坯中氧化物夹杂的数量明显减少,尺寸变小,铸坯的平均w([TO])最低可达7×10-6,吨钢成本可降低5～10元。
The production of high-purity steel is a major issue for the iron and steel enterprises in the 21st century. The control of total oxygen content and inclusion content in steel is the key technology for producing high-purity IF steel. To this end, I propose a new inclusion control technology - reaction induced by small heterogeneous phase removal of small inclusions in the molten steel process, designed a composite sphere with this kind of function, and conducted an industrial field test study. The experimental results show that the process of removing inclusions by small heterogeneous phase reaction is a low cost, high efficiency, simple and easy control method of inclusions, which can significantly reduce the number of non-metallic inclusions in IF steel. Compared with the traditional process, the amount of oxide inclusions in slab decreases obviously after the molten steel is treated by the technology, and the average w ([TO]) of the slab reaches a minimum of 7 × 10-6. The cost of a ton of steel can be reduced by 5 to 10 yuan.