公开(公告)号：US4705563A

公开(公告)日：1987-11-10

申请号：US922363

申请日：1986-10-23

申请人： Roger B. Poeppel ,  Sherman Greenberg ,  Dwight R. Diercks

发明人： Roger B. Poeppel ,  Sherman Greenberg ,  Dwight R. Diercks

IPC分类号： C21B13/00 ,  C21C5/44 ,  F27B3/14 ,  F27D1/16 ,  F27D3/16 ,  C22B9/00

CPC分类号： F27B3/14 ,  C21C5/44 ,  F27D1/1678 ,  F27D2003/161

摘要： Methods and apparatus are provided for reducing corrosion in a refractory lining of a liquid-containing vessel used in direct steelmaking processes. The vessel operates at between about 1600.degree. C. and about 1800.degree. C. and an oxygen partial pressure of about 10.sup.-12 atmospheres, creating slag which is rich in FeO. The refractory lining includes a significant level of chromium oxide (Cr.sub.2 O.sub.3), and has small interconnected pores which may be filled with a gas mixture having a higher total pressure and oxygen partial pressure than the total pressure and oxygen partial pressure associted with the liquid against the lining of the vessel.The gas mixture is forced through the pores of the lining so that the pores are continuously filled with the mixture. In this manner, the gas mixture creates a blanket which increases the oxygen partial pressure at the lining enough to maintain the chromium in the lining in a selected valence state in which the chromium has decreased solubility in the FeO slag, thereby reducing corrosion by the FeO and increasing the useful life of the refractory lining.

摘要翻译： 提供了用于减少在直接炼钢过程中使用的含液体容器的耐火衬里中的腐蚀的方法和装置。 容器在约1600℃至约1800℃之间运行，氧分压约为10-12个大气压，产生富含FeO的炉渣。 耐火衬里包括显着水平的氧化铬（Cr 2 O 3），并且具有小的互连孔，其可以填充具有比与液体相反的总压力和氧分压更高的总压力和氧分压的气体混合物 船内衬。 气体混合物被迫通过衬里的孔，使得孔被连续填充混合物。 以这种方式，气体混合物产生毯子，其增加衬里处的氧分压足以将衬里中的铬保持在选定的价态中，其中铬在FeO炉渣中具有降低的溶解度，从而减少FeO的腐蚀 并增加耐火衬里的使用寿命。