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| Theoretical Analysis for Splashing in Iron Ladle of Mechanical Stirring Desulphurization Process |
| CHEN Yu-xin, XU Dong-li, WANG Li, HUANG Jun, XUE Yong-qiang |
| （Manufactory Department, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200， Hebei, China） |
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Abstract KR processes desulphurization more efficiently and less consumptivey with mechanical stirring. Hot metal splashes from KR ladle without blow-in gases. An example of CO splashing in KR process is involved, trying to find out why and how it happens. It is revealed that the residual iron and ferrite will turn into ferrous oxide after long-term hot baking. Ferrous oxide would be melt or turn into liquid fayalite after reacting with silicon in hot metal. The drops would float up and react with carbon in hot metal at some depth, generating carbon oxide. These reactions would be fastened after stirring, resulting in splashing. Higher temperature, more carbon and less silicon in hot iron, more heavily it splashes. To preventing splashing, time upper limit should be carried out when baking. “Belch” or “surface rolling” is a significant signal before splashing, pay more attention or stop operation.
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Received: 18 September 2013
Published: 13 October 2014
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2014, Vol. 49 
