Question

Can aluminium be extracted from bauxite through hydrometallurgy?

Answer 1

Yes

• Extraction using aqueous solution is called Hydrometallurgy.
• It is a preferential process.
• Generally low grade or complex ores are extracted using hydrometallurgy.

Steps In Hydrometallurgy :-

1. Preparation of ore for leaching ( size reduction, chemical treatment )
2. Leaching ( dissolution ) which is hydro mettalurgical method
3. Separation of leach liquor
4. Recovery of metallic values from leach liquor (precipitation )

5.Recycling of leach liquorliquor

Extraction Process of Aluminiumfrom Bauxite Ore. Aluminum is the most abundant metal in the earth's crust and is a constituent of many minerals. ... In this process the ground bauxite is leached with caustic soda (NaOH) to produce soluble sodium aluminate (NaAlO2), leaving the impurities in the insoluble residue