富氧燃烧气氛中钢坯的氧化过程

为了研究在冶金轧钢加热炉富氧燃烧条件下炉内钢坯的氧化状况,自行设计搭建了可控气氛钢坯传热传质过程实验平台,研究富氧燃烧气氛对钢坯氧化传质的影响规律及不同温度下氧化层的形貌特征。结果表明：钢坯的氧化过程可以分为快速氧化阶段和慢速氧化阶段。在高温环境中,随着氧化温度的提高,CO2和H2 O的浓度变化对钢坯氧化的影响逐渐加强,随着CO2和H2 O浓度的提高,钢坯的氧化烧损程度也变得越来越严重。钢坯氧化层主要是由Fe3 O4和FeO组成。

Billet oxidation in oxygen-enriched combustion

To research the oxidation status of billets in a reheating furnace when oxygen-enriched combustion was used, the influ-ence rule of oxygen-enriched combustion atmospheres on the oxidation process of billets was studied by the self-designed experimental platform in the controlled atmosphere. The morphology of the oxide layer at different temperatures was analyzed. The results show that the oxidation process is divided into a fast oxidation stage and a slow oxidation stage. In the high temperature environment, CO2 and H2 O have more effect on the oxidation of billets and the billets will be badly oxidized by high concentration of CO2 and H2 O. The oxide layer is mainly composed of Fe3 O4 and FeO.