Refractory Technology
What is Thoria?

All of these
Which is expensive & radioactive, is used in crucibles for melting high purity metals
Thoria Has high resistance to basic slags
Thoria Has high fusion temperature (> 3000°C) but poor resistance to thermal shock

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Refractory Technology
Tar bonded dolomite bricks

Are stored under controlled temperature & humidity to avoid hydration
Have poorer hydration resistance than pitch bonded bricks
All of these
Are used in outer lining of L.D. converters

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