Question

For melting iron around ${3000}^{0}C$. Which flame is used?

• A. Oxyacetylene flame
• B. Acetylene flame
• C. Bunsen burner flame
• D. Natural gas flame

Answer 1

The correct option is A Oxyacetylene flame

The oxyacetylene process produces a high temperature flame, over 3000 degrees C, by the combustion of pure oxygen and acetylene. It is the only gas mixture hot enough to melt steel and other gases like propane, LPG or hydrogen which can be used for lower melting point non-ferrous metals, for brazing and silver soldering and as a preheating or piercing gas for cutting.