富氧燃烧气氛对低碳钢氧化过程的影响  

Effects of Oxygen-enriched Combustion Atmosphere on Oxidation Process of Lowcarbon Steel

作　　者：王乃帅[1] 温治[1,2] 楼国锋[1,2] 孙大勇[1] 张道明 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学冶金工业节能减排北京市重点实验室,北京100083 [3]重庆赛迪工业炉股份有限公司,重庆400013

出　　处：《热加工工艺》2014年第12期62-65,68,共5页Hot Working Technology

基　　金：中央高校基本科研业务费专项资金(FRF-SD-12-013A)

摘　　要：针对富氧燃烧加热炉内钢坯氧化烧损问题,基于氧化机理分析,建立低碳钢氧化动力学模型,实验验证该模型能较好定量描述各种影响因素与氧化量之间的关系。对钢坯在不同富氧燃烧气氛下的恒温与变温氧化过程进行模拟。结果表明:CO2/H2O的氧化作用随温度提高而增强,在1000℃以下,助燃气氧浓度对钢坯氧化无明显影响,在1000℃以上,随助燃气氧浓度增加,钢坯氧化加剧,且在低烟气过剩氧浓度下增加明显。温度与烟气过剩氧浓度是影响钢坯氧化的主要因素,因此在富氧燃烧炉中采用低氧快速加热可降低钢坯的氧化烧损。The problem of oxidation of billet in heating furnace with oxygen-enriched combustion requires more attention. The oxidation kinetics model of low carbon steel is set up, based on the analysis of oxidation mechanism. The experiments verify that the model can quantitatively describe the relationship between various influence factors and amount of oxide. The oxidation process of billet in different oxygen-enriched combustion atmosphere under constant temperature and variable temperature oxidation process was simulated. The results show that the oxidation of CO2 / H2O strengthens with temperature increasing. Oxygen concentration of oxidant gas has no significant effects on the oxidation of billet below 1000 ℃, meanwhile, above 1000 ℃, the oxidation of billet strengthens along with oxygen concentration of oxidant gas increasing, and significantly increases under low excess oxygen concentration of flue gas. Visible temperature and excess oxygen concentration of flue gas are the main factors for influencing the oxidation of billet. So the strategy of low oxygen rapid heating can reduce the oxidation of billet in the heating furnace with oxygen-enriched combustion.

关 键 词：富氧燃烧 加热炉 氧化烧损 数值模拟 

分 类 号：TG15[金属学及工艺—热处理]