铬矿铁浴碳还原制备高铬不锈钢母液的试验研究

Experimental Study on Prepartion of High Chromium Stainless Steel Mother Liquid by Reduction of Chrome Ore in Iron Bath with Carbon

针对铬矿在较高铬含量的铁浴中采用碳还原时的还原率进行研究。主要考察了铁水中铬含量、还原时间、还原温度和渣碱度等因素对铬还原率的影响。结果表明,随着铁水中铬含量的增加,铬还原率呈下降趋势,在铁水中铬质量分数达到30%后,铬还原率急剧下降。还原反应进行到75 min后逐渐趋于平衡,还原温度越高,越有利于还原反应的进行,渣碱度R=1.1时还原效果最好。

The reduction rate of chromium ore through carbon was studied in iron bath with high chromium content,factors such as chromium content in iron bath,reduction time,reduction temperature and slag basicity on reduction rate were mainly investigated.The experimental results showed that the reduction rate decreased with the increase of chromium content in bath.The reduction rate decreased sharply as chromium content in iron bath was over30%by mass.When the reduction time was75min,the reaction approached equilibrium.The higher the reduction temperature,the more easily the reducing reacti on went on.The best reduction effect was obtained as slag basicity was1.1.