INTRODUCTION TO PATENTS

摘要

＜正＞2015-13.Operation method for mechanically stirring chrome-containing molten iron Patent No.:US8753423Date of Patent:2014-06-17Inventor（s）:Sugiura;Masayuki,et al.Assignee:Nisshin Steel Co.,Ltd.[JP]A method for stirring chrome-containing molten iron includes mechanically stirring chrome-containing molten iron contained in a refining vessel by the use of an impeller that has a rotation axis in the vertical direction.In the refining vessel,the horizontal cross section of the inner wall is circular around the central axis of the vessel in the vertical direction and the impeller,as