Question

Give a brief account of the extraction of tin from its ores.

Answer 1

Extraction of tin from its ores involves the following steps:

1. Concentration: The ore is crushed and concentrated by gravity or froth flotation.
2. Roasting or Calcination: The concentrated ore is heated to convert impurities into oxides.
3. Reduction: The oxide ore is reduced to tin metal by heating with carbon in a furnace.
4. Purification: The crude tin obtained is purified by liquation or electrorefining.