====== Smelt ======

Recovery Boiler [[boiler:smelt_system:reduction_efficiency|reduction efficiency]]: **93 - 95%** in smelt (typical 97%)

Production: about **0.4 kg / 1 kg** of [[[[boiler:fuel_system:black_liquor|black liquor DS]]\\

Typical Composition:\\
Sodium Carbonate Na<sub>2</sub>CO<sub>3</sub>: **65 - 75%**\\
Sodium Sulfide Na<sub>2</sub>S: **20 - 25%**\\
Sodium Sulfate Na<sub>2</sub>SO<sub>4</sub>: **0.5 - 1.5%**\\

Melting Point: **800 - 900 <sup>o</sup>C**

[[boiler:smelt_system:smelt_spouts|Smelt spouts]] are used to help remove the smelt from the recovery boiler.