Question

Salt bath furnaces are used for:

• A. Melting metals
• B. Heat treating small parts
• C. Generating steam
• D. Incinerating waste

Hint:

Salt bath furnaces are ideal for precise, uniform, and oxidation-free heat treatment of small and intricate components.

Answer 1

The Correct Option is B

Step 1: Salt bath furnaces are specialized heating devices used primarily for the heat treatment of small metal components. The parts are immersed in a molten salt medium that provides uniform and controlled heating. 
Step 2: This method is highly effective for applications such as hardening, tempering, annealing, and carburizing because it ensures excellent temperature uniformity and rapid heat transfer. 
Step 3: The use of salt also prevents oxidation and scaling, preserving the surface finish of the components during treatment. 

Why the other options are incorrect:

• (A) Melting metals typically requires crucible or induction furnaces.
• (C) Steam generation is done in boilers, not salt bath furnaces.
• (D) Incineration of waste is handled by incinerators, not designed for precision heating of parts.