富氧降低钢坯氧化烧损及其影响因素排序试验  

Experimental Study on Oxide Scale of Steel Slab Under Oxygen-Enrichment Combustion

作　　者：齐丽英[1,2] 苍大强[1,2] 洪流[1,2] 白皓[1,2] 李远[1,2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]钢铁冶金新技术国家重点实验室,北京100083

出　　处：《燃烧科学与技术》2013年第6期529-534,共6页Journal of Combustion Science and Technology

基　　金：广东省重大科技专项基金资助项目(2010A080804005);粤港关键领域重点突破基金资助项目(2010Z52102)

摘　　要：通过自行设计和搭建的钢坯富氧燃烧小型加热炉,研究了不同富氧体积分数条件下,钢坯的氧化烧损率、燃料消耗量、试样钢坯加热时间的变化规律及钢坯氧化程度随温度变化的规律,当氧体积分数为36%时,钢坯氧化烧损降低约37%,燃料节约26%;富氧燃烧缩短钢坯在高温区的停留时间,因此节约了燃料,降低钢坯的氧化烧损,SEM、XRD分析结果表明:富氧使氧化铁皮中Fe3O4层增厚,阻碍了氧的扩散,减少了钢坯的氧化烧损,且当钢坯的中心温度在1,100,℃以上时,富氧燃烧对减少钢坯的氧化烧损有显著作用;影响钢坯氧化烧损因素的强弱顺序依次为加热时间、氧体积分数和炉气温度.An experimental-scale heating furnace system was designed to study the oxide scale of steel slab under oxygen-enrichment combustion. Several factors, including heating time, oxygen content and temperature, were investigated, and the structure of oxides formed on the slab was characterized. When the oxygen concentration was 36%, the oxidation loss of billet was reduced by approximately 37% and 26% of the fuel was saved because of the decreased heating time. The results show that the magnetite film formed on the slab increases in thickness with oxygen enrichment by SEM and XRD, thus restricting the diffusion of oxygen, because of which the rate of oxide scale decreases. Oxygen-fuel combustion has significant influence on the reduction of oxide scale when the slab is heated to more than 1 100 ~C in the center. Heating time has the greatest contributions to the increase of oxide scale, followed by oxygen content and furnace gas temperature.

关 键 词：富氧燃烧 氧化烧损 氧体积分数 加热时间 温度 

分 类 号：TG307[金属学及工艺—金属压力加工]