低碳钢中硼的损失机理研究  

Loss mechanism of boron in low-carbon steel

作　　者：余璐[1] 李晶[1] 史成斌[1] 刘伟建[1] 蔡可森 曹余良 姚永宽 李翔 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]南京钢铁集团中厚板卷厂,南京210035 [3]江苏省高端钢铁材料重点实验室,南京210035

出　　处：《有色金属科学与工程》2016年第1期24-27,79,共5页Nonferrous Metals Science and Engineering

摘　　要：根据南钢低碳含硼钢BOF-LF-CC工艺制定取样方案,跟踪硼含量的变化.通过试验结果及理论热力学计算,分析了含硼低碳钢在生产过程中硼的损失机理,并提出了优化方案.结果表明:精炼过程中[B]与[O]、[N]、N_2的反应不能自发进行,造成硼损失的主要原因是硼与空气中的O_2发生氧化反应.因此,避免钢液中[B]与空气直接接触成为提高硼收得率的重要手段,从而提出了3点优化方案:1控制搅拌,防止钢液面与空气接触反应;2在精炼结束至中间包运输过程中对钢包采用加盖操作;3浇铸过程中加强钢液由中间包至结晶器之间密封保护.The change of boron content in liquid steel during production process BOF-LF-CC was tracked from plant trials. The loss mechanism of boron was discussed based on experimental results and thermodynamics. In addition, optimization measures were proposed. The results show that the reactions between [B] and [O], [N], N2 cannot take place, the oxidation reaction between [B] and 02 in the air is the main way to lose boron. Avoiding the [B] exposing to the air can be an effective method to reduce the loss of boron in liquid steel. Therefore, three optimization measures have been put forward, including： preventing the oxidation reaction between the steel liquid and air by controlling the stirring power; lidding the steel ladle during the transportation process from refining furnace to tundish to avoid the liquid steel exposing to the air; enhancing the tightness between tundish and mould during the casting process.

关 键 词：硼 低碳钢 损失机理 热力学计算 

分 类 号：TF701.2[冶金工程—钢铁冶金]