Utilising the oxyfuel practice for CH₄-fuelled combustion has positive effects on the emissions, efficiency and cost of high temperature furnace practices. However, especially in older installations, oxyfuel usage requires retrofitting and alters the atmosphere in which the oxidation of the steel occurs, when compared to using air as the oxidiser. Stainless steel slab oxide growth during reheating was studied in different atmospheres. The simulated post-burn atmospheres from oxyfuel, lean oxyfuel and air-fuel practices were used to compare oxide-scale layer growth and morphology during simulated typical AISI 304 stainless steel slab reheating prior to hot rolling. Thermogravimetric measurements, glow discharge optical emission spectrometer (GDOES) and field-emission scanning electron microscope energy dispersive X-ray (FESEM-EDS) methodology were applied to discern differences between oxide growth and inner oxide layer morphology between the three practices. Switching from air to oxyfuel practice at a single temperature had the same increasing effect on the scale formation amount as a 25 °C temperature increase in air atmosphere. Inner oxide layer depth profiling revealed C, Si and Ni to be the main elements that differed between temperatures and atmospheres. A morphology study showed Si and Ni behaviour to be linked to breakaway oxidation.

中文翻译：

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CH4加热炉中气氛对不锈钢板氧化物形成的影响

使用CH ₄的富氧燃料实践燃料燃烧对高温炉的排放，效率和成本产生积极影响。但是，与使用空气作为氧化剂相比，尤其是在较旧的设备中，含氧燃料的使用需要翻新并改变发生钢氧化的气氛。在不同的气氛下研究了不锈钢板坯在再加热过程中的生长。来自含氧燃料，贫氧燃料和空气燃料的模拟燃烧后气氛被用来比较模拟AISI 304不锈钢板坯在热轧前再加热期间氧化皮层的生长和形态。热重测量 辉光放电光发射光谱仪（GDOES）和场发射扫描电子显微镜能量色散X射线（FESEM-EDS）方法应用于识别三种方法之间的氧化物生长和内部氧化物层形态之间的差异。在单一温度下从空气转换为含氧燃料实践对结垢量的增加效果与空气气氛中25°C的温度增加相同。内部氧化物层深度分析表明，C，Si和Ni是在温度和大气之间不同的主要元素。形态研究表明，Si和Ni的行为与分离氧化有关。在单一温度下从空气转换为含氧燃料实践对结垢量的增加效果与空气气氛中25°C的温度增加相同。内部氧化物层深度分析表明，C，Si和Ni是在温度和大气之间不同的主要元素。形态研究表明，Si和Ni的行为与分离氧化有关。在单一温度下从空气转换为含氧燃料实践对结垢量的增加效果与空气气氛中25°C的温度增加相同。内部氧化物层深度分析表明，C，Si和Ni是在温度和大气之间不同的主要元素。形态研究表明，Si和Ni的行为与分离氧化有关。