The rate of decarburization of liquid iron by CO2 and H2
The rate of decarburization of liquid iron by CO2 and H2
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DOI：
10.1007/bf02644314
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发表时间：
1974-05
期刊：
影响因子：
--
通讯作者：
R. Fruehan;L. J. Martonik
中科院分区：
文献类型：
--
作者：
R. Fruehan;L. J. Martonik
研究了铁液在1800k时，在co - co2和氢的混合物中脱碳的速率。测定了硫对co - co2速率的影响。采用了两种实验技术，一种是平行于熔体表面的气体流动，另一种是垂直于熔体表面的气体流动。在co - co2混合物和高碳含量的氢中，脱碳速率主要由靠近液体表面的气膜边界层中的扩散控制。0.3 wt %硫的存在使co - co2的脱碳速率降低了约10%，这表明当表面被硫原子覆盖时，表面上的缓慢化学反应对脱碳速率有轻微影响。在co - co2低碳含量时，脱碳速率主要由金属中的碳扩散控制。通过测量石墨在co - co2混合物中的氧化速率，研究了所采用的实验几何形状的传质关系。在以前的工作中，它得出结论，化学反应是控制速率被重新检查，并得出结论，气相传质实际上是控制反应的速率。
The rate of decarburization of liquid iron in CO-CO2mixtures and hydrogen at 1800 K has been investigated. The effect of sulfur on the rate in CO-CO2was also determined. Two experimental techniques were employed, one with the gas flow parallel to the surface of the melt, the other with gas flow perpendicular to it. The rate of decarburization in both CO-CO2mixtures and hydrogen at high carbon contents is controlled primarily by diffusionsion in the gas film boundary layer near the surface of the liquid. The presence of 0.3 wt pct sulfur reduced the rate of decarburization in CO-CO2by about 10 pct indicating that a slow chemical reaction on the surface is effecting the rate slightly when the surface is covered with sulfur atoms. The rate of decarburization at low carbon contents in CO-CO2is controlled primarily by carbon diffusion in the metal. The mass transfer relationships for the experimental geometries employed were investigated by measuring the rate of oxidation of graphite in CO-CO2mixtures. Previous work in which it was concluded that a chemical reaction was controlling the rate were re-examined and it was concluded that gas phase mass transfer was in fact controlling the rate of the reaction.