海绵铁中夹杂物的显微分析

THE MICROSCOPICAL ANALYSIS ABOUT INCLUSION IN SPONGE IRON

对固态还原生成的海绵铁中的硫化物、氧化物进行了显微分析。分析结果证明 ,海绵铁中的杂质以多元复合物的形式存在。还原过程中的原子行为 ,使杂质扩散聚集组成共晶形态或多元点状形态的夹杂物。氧化物的数量基本上受到还原工艺的控制 ,当还原非常彻底时 ,氧主要以氧化钙的形式存在 ;而还原不充分时 ,也会存在大量氧化铁。

This paper analyzes the shape of oxide inclusion, sulfide inclusion in sponge Iron. It is proved that the impurity substance exists in the form of poly compound. The poly compound mostly exists in eutectic crystal shape or polybasic point shape. When the ferric oxide is deoxidated completely, the oxygen mainly forms calcium oxide. Otherwise, ferric oxide exists largely.