Corrosion mechanism of commercial MgO-C refractories in contact with different gas atmospheres
Corrosion mechanism of commercial MgO-C refractories in contact with different gas atmospheres
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DOI：
10.2355/isijinternational.48.760
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发表时间：
2008-01-01
影响因子：
1.8
通讯作者：
Josson, Par
中科院分区：
文献类型：
--
作者：
Jansson, Sune;Brabie, Voicu;Josson, Par
在实验室实验中，研究了MgO - C耐火材料在由空气、氩气、一氧化碳或氩气/一氧化碳组成的不同气体气氛中的腐蚀情况。总共在1173至1773 K的温度范围内以及2至120分钟的保温时间内进行了103次实验。通过测量样品的失重确定了MgO - C材料的反应速率。结果表明，耐火材料的失重随着温度升高或保温时间延长而增加。热力学条件和实验结果表明，当耐火材料由MgO - C组成时，在钢包精炼过程中应该会形成镁气和一氧化碳气体。有人提出，反应速率直接取决于周围环境气氛中的氧势。
Corrosion of MgO-C refractories in different gas atmospheres consisting of air, Ar, CO or Ar/CO was studied in laboratory experiments. In total, 103 experiments were carried out in the temperature range 1 173 to 1 773 K and for holding times between 2 to 120 min. The reaction rate of the MgO-C material was determined from measurements of the weight loss of the samples. The results showed that the refractory weight loss increased with an increased temperature or an increased holding time. The thermodynamic conditions and the experimental results showed that magnesium gas and carbon monoxide gas should form during ladle refining of steel when the refractory material consists of MgO-C. It was suggested that the reaction rate is directly dependent on the oxygen potential in the ambient atmosphere.