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Furnace Technology

Furnace Technology
Hearth furnaces are not used for

None of these
Melting
Roasting
Reheating

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Furnace Technology
To reduce the stack loss, heat recovery from flue gas can be done by

All of these
Preheating of cold stock
Steam generation in waste heat boilers
Preheating of combustion air

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Furnace Technology
Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

1250
750
350
1050

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Furnace Technology
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an

Salt bath furnace
Annealing furnace
Blast furnace
Steam boiler

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Furnace Technology
Ceramic recuperators compared to metallic recuperators for the same duty

Are less costly
Have higher pressure differential between flue gas & air side
Are lighter
Occupy more space

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Furnace Technology
Reheating furnace (pusher type) is used for heating

Ingots
Steel coils
Slabs
Steel sheets

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