Concentration of Ores

The video tutorial covers various methods of ore concentration, including gravity separation, magnetic separation, froth flotation, and leaching. Gravity separation uses the difference in specific gravity to separate denser ores from lighter gangue. Magnetic separation involves using a magnet to separate magnetic ores from non-magnetic materials. Froth flotation is used for sulfide ores, where collectors and froth stabilizers aid in separating hydrophobic mineral particles. Leaching involves converting metals into soluble salts, demonstrated with alumina extraction from bauxite and noble metals like gold and silver.

What is leaching, and how is it used in the extraction of metals?

Describe the chemical reaction involved in the leaching of alumina from bauxite.

How can noble metals like gold and silver be extracted using the leaching process?