Match the process to its role

Exercise and reference answers

Matching pairs

1. Left

   Froth flotation

   Right

   Concentrates sulphide ores

2. Left

   Roasting

   Right

   Sulphide to oxide (excess air)

3. Left

   Calcination

   Right

   Carbonate to oxide (little air)

4. Left

   Smelting

   Right

   Reduction with a flux

5. Left

   Cyanide leaching

   Right

   Dissolves gold as a complex