反应诱发微小异相去除钢液中细小夹杂物技术研究

来源期刊：钢铁2010年第8期

论文作者：唐复平 李镇 王晓峰 刘万山 陈本文

文章页码：28 - 32

关键词：炉外精炼； 复合球体； 小气泡； 渣洗； 夹杂物； 爆炸

Key words：secondary refining； composite ball； fine bubble； slag washing； inclusion； explosive reaction

摘    要：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。

Abstract: In the present investigation,a novel fine inclusion removal technology due to the dispersed in-situ phase induced by composite ball explosion reaction was put forward.A composite ball with this function was designed and industrial investigation has been carried out on the base of the experimental research.The results indicate that feeding composite ball in RH furnace is a novel technology and inclusion in the molten steel can be removed effectively.w(CaCO₃)/w(CaO) ratio in composite ball has a great effect on the inclusion removal efficiency.More feeding times and a little feeding amount can increase the using efficiency of the composite ball.Compared with the conventional inclusion removal technology,the number of the oxide inclusion can be decreased to a lower level and the inclusion size becomes much finer.Using this novel technology,the total oxygen in the as-cast slab can approach to 6×10^-6.