Furnace Technology
The heating capacity of continuous reheating furnace depends upon the

Emissivity of the stock
Ratio of wall surface to stock surface
All of these
Hearth area and furnace temperature

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Furnace Technology
In practical operation of any furnace, zero oxygen percentage or theoretical CO₂ percentage in flue gas is rarely achieved, because of

Imperfect mixing of fuel & air and infiltration of air
Use of pulverised solid fuels
Use of non-preheated combustion air
Use of excessive positive draft in the furnace

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