The Research of Low-Oxygen Control and Oxygen Behavior during RH Process in Silicon-Deoxidization Bearing Steel
The Research of Low-Oxygen Control and Oxygen Behavior during RH Process in Silicon-Deoxidization Bearing Steel
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DOI：
10.3390/met9080812
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发表时间：
2019-07
期刊：
影响因子：
2.9
通讯作者：
W. Xiao;Min Wang;Y. Bao
中科院分区：
文献类型：
--
作者：
W. Xiao;Min Wang;Y. Bao
通过工业试验研究了含硅脱氧轴承钢冶炼过程中总氧（T.O）含量、夹杂物特征、炉渣组成及废气行为的变化规律。计算了RH （Ruhrstahl-Hereaeus真空脱气炉）过程中结合氧含量的变化，并与T.O含量的变化进行了比较。结果表明，RH过程中氧含量的降低主要是由于溶解氧的去除而不是氧化物的去除。在高真空条件下，碳是一种强脱氧剂（比铝强）。顶渣是脱氧过程的氧源，导致钢液再氧化，尽管顶渣中FeO含量较低。RH过程中，氧的变化主要存在于三个过程中：1)真空室中的脱氧反应，2)真空室中钢液与钢包内的氧传质过程，3)钢包渣与钢水之间的氧传质过程。它主要取决于钢液中氧的传质。
The variation of total oxygen (T.O) content, characterization of inclusions, slag composition, and off-gas behavior during the smelting process of silicon-deoxidization bearing steel were investigated with industrial experiments. The change of content of combined oxygen during RH (Ruhrstahl–Hereaeus vacuum degassing furnace) process was calculated and compared with T.O content change. It is found that the decrease of oxygen content is mainly caused by the removal of dissolved oxygen rather than the removal of oxides during RH process. Carbon was found to be a strong deoxidizer (stronger than aluminum) in high vacuum degree. Top slag is an oxygen source of the deoxidization process, leading to the re-oxidization of liquid steel, even though the FeO content is low in top slag. During the RH process, the change of oxygen mainly exists in three processes: 1) Deoxidization reaction in vacuum chamber, 2) oxygen mass transfer process between liquid steel out from a vacuum chamber and in ladle, and 3) oxygen mass transfer between ladle slag and liquid steel. It depends mainly on the mass transfer of the oxygen in the liquid steel.