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Discussion

Kiln fuels commonly include

  • A.coal, petroleum coke, oil and natural gas
  • B.electricity supplied to resistance heaters
  • C.steam raised in an adjacent boiler house
  • D.hydrogen produced within the plant itself

Answer: A

Solid fuels dominate because they are cheap and give a luminous flame that radiates well to the charge. Electricity and steam are quite unsuited to raising a large mass of solids to 1,450 degrees. A luminous flame also transfers heat by radiation far better than a clear one.

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