摘要
本文用Mossbauer谱测定了钢材加热过程中所生成的氧化铁皮的组成,发现:(1)氧化铁皮的主要成分是FeO,其次是Fe_3O_4,还有少量的α-Fe_2O_3;(2)用乳化重油代替重油作为燃料加热钢材所生成的氧化铁皮成分中Fe_3O_4的比例显著增大,FeO的比例明显减小,α-Fe_2O_3的相对含量也有所降低。从化学反应平衡常数的计算得知;钢材加热过程中,随着气相组成中水和氢分压比的变化,氧化物中Fe_3O_4与FeO的比例会发生变化,这种变化趋势与Mossbauer谱的测定结果相一致.从而推断出燃用乳化重油改变氧化铁皮成分和降低氧化烧损的原因。
The Mosbauer spectra of oxide scale of steel formed during heating have been studied. The results showed that (a) the dominating composition in the scale is FeO ( >70%), Fe3O4 (-15% ) and some α-Fe2O3 (< 10% ); (b) burning emulsified fuel oil would increase the ratio of Fe3O4 to FeO and toα-Fe2O3 in the oxide scale, especially in its inside layer.The calculation of equilibrium constants indicated that composition of the scale can vary with the change of PH2O/PH2 in the gaseous phase, which corresponded with the results of the Mossbauer measurement, thus satisfactorily explaining why the scale composition varied and the scale formation was decelerated when adopting emulsified fuel oil.
出处
《核技术》
CAS
CSCD
北大核心
1992年第4期199-204,共6页
Nuclear Techniques
基金
上海市经委节能办公室资助
关键词
氧化烧损
乳化重油
钢
穆斯堡尔谱
Mossbauer spectra Scale formation Emulsified fuel oil
