公开(公告)号：EP2907880A4

公开(公告)日：2016-06-29

申请号：EP13845014

申请日：2013-09-09

申请人： POSCO

发明人： SONG MIN HO ,  KIM WOOK ,  KANG SOO CHANG ,  HAN WOONG HEE ,  PARK JUNG HO

IPC分类号： C21C1/02 ,  C21C1/06 ,  C21C7/064 ,  F27D27/00

CPC分类号： C21C1/02 ,  C21C1/025 ,  C21C1/06 ,  C21C7/064 ,  C21C7/0645 ,  F27D27/00

摘要： The present invention concerns to an impellor for stirring a melt pool and concerns a melt-pool processing method using same. The impellor includes: an impellor body extending in the length direction; a blowing nozzle which is provided in such a way as to pass through one part at the bottom end of the impellor body; and a blade provided on the upper part of the impellor body. As a result, when embodiments of the present invention are used, a stirring flow produced due to the blade and a stirring flow due to substances blown into the melt-pool via the blowing nozzle correspond to each other, and the two flows are combined such that the overall stirring force is improved. Consequently, it is possible to improve the efficiency of stirring by the impeller as compared with hitherto, and, as a result, refining efficiency in the refining step is improved as the rate of reaction between the melt-pool and additives is increased.

公开(公告)号：EP3078434A4

公开(公告)日：2016-10-12

申请号：EP13898865

申请日：2013-12-24

申请人： POSCO

发明人： KIM WOOK

IPC分类号： B22D11/16 ,  B22D11/10 ,  B22D11/11 ,  B22D41/50

CPC分类号： F27D21/00 ,  B22D1/007 ,  B22D11/11 ,  B22D11/16 ,  B22D41/50 ,  C21C7/00 ,  F27M2001/02

摘要： Disclosed are a molten steel treatment apparatus and a molten steel treatment method capable of quickly measuring an inclusion adhesion state inside a nozzle during an operation, the molten steel treatment apparatus including a container, a nozzle equipped in a molten steel tap hole of the container, a liner which is disposed on a portion of an inner circumferential surface of the nozzle and is formed of an ion-conductive material, a power supply for applying electric power to the molten steel and the liner, and a measuring unit for measuring a voltage value or a current value between the molten steel and the liner, and the molten steel treatment method including measuring a voltage value or current value between the molten steel and the liner; and determining a thickness of an inclusion adhering to an interface between the molten steel and the liner by using the voltage value or the current value.