Refractory Technology
Carbon refractory blocks

All of these
Are used in the hearth of blast furnace
Are acidic in nature
Are wetted by molten iron

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Refractory Technology
Tar bonded dolomite bricks

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

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