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Challenges for Sustainable Ironmaking at ArcelorMittal - ABM

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Tubarao No. 1 BF BF – SHELL DEGRADATION<br />

Cracks Evolution<br />

Cracks Lenght<br />

6<br />

4<br />

2<br />

0<br />

1999 / 2<br />

2000/1<br />

2000/2<br />

2001/1<br />

2001/2<br />

2002/1<br />

2002/2<br />

2003/1<br />

2003/2<br />

2004/1<br />

2005/2<br />

2006/1<br />

2006/2<br />

2007/1<br />

6250 mm<br />

2007/2<br />

2008/1<br />

Accum.<br />

year<br />

05/10/2008 44

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