The ‘carbon boil” is an important part of refining of steel in melting furnaces. Which of the following statements are correct for carbon boil?
1. Agitating the bath, causes thorough mixing.
2. Reduction of carbon, nitrogen and hydrogen.
3. Bring non-metallic into contact with slag and hence cleans the metal.
1
1 and 2 only
2
1 and 3 only
3
1, 2 and 3
4
2 and 3 only