Crucible furnaces are economical for melting metal, but heat

crucible-furnaces-are-economical-for-melting-metal-but-heat

Crucible furnaces are economical for melting metal, but heat loss is the major problem in the crucible furnaces.

A. True

B. False

I have been asked this question in final exam.

The question is from Crucible Furnaces topic in portion Metal Furnace and Practice of Casting-Forming-Welding II

Correct answer is B. False

Easy explanation: In crucible furnaces, there is no direct collision of flame on the material. And the heat loss to the outside surrounding is restricted by the refractory walls. However, the energy efficiency of the crucible furnace is low with approximately 60% of the heat loss affected by the radiation and the temperature control is also very difficult in the crucible furnaces.