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Comparing a lightweight ceramic fibre lining with a dense refractory for a batch furnace, the fibre lining

  • A.withstands mechanical abuse better in service
  • B.is preferable for a continuously operated furnace
  • C.stores far less heat and so wastes less on each reheat
  • D.conducts heat better and so transfers more to the charge

Answer: C

The stored heat lost on every shutdown is a large share of a batch furnace's fuel, and a low mass lining reduces it substantially. Dense refractory resists abrasion and impact far better, which is why it survives in continuous and heavily worked furnaces.

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