提出一种反应诱发微小异相去除钢液中细小夹杂物技术,并在此基础上设计了一种具有该种功能的复合球体,开展了工业现场试验研究.结果表明反应诱发微小异相去除钢液中细小夹杂物技术是一种有效的夹杂物去除工艺,可以显著降低钢液中非金属夹杂物数量.反应诱发微小气泡与渣滴的尺寸可以通过复合球体CaCO3粉末的大小进行控制.复合球体中w(CaCO3)/w(CaO)比值大小对钢液中的夹杂物作用较大.多次、少量的投入能够有效提高复合球体的利用率.与传统工艺相比,该技术具有方便易行、成本低、效率高等特点,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,钢的全氧质量分数最低可达6×10-6.
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