What is the purpose of enrichment of ore before extraction?
To remove impurities
Correct Answer: To remove impurities
Ores extracted from mines contain large amounts of unwanted materials called gangue (sand, clay, mud). Enrichment (concentration) of ore removes these impurities before smelting.
Common methods of ore enrichment:
- Gravity separation – denser ore particles separated from lighter gangue.
- Froth flotation – sulphide ores float in frothy mixture; gangue sinks.
- Magnetic separation – for magnetic ores like magnetite.
- Leaching – chemical dissolution of ore component.
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