Ore — আকরিক

Definition

An ore is a naturally occurring rock or mineral from which a metal or other valuable material can be extracted at worthwhile cost. Most ores are metal compounds mixed with rocky impurities called gangue: haematite ($\mathrm{Fe_{2}O_{3}}$) gives iron, bauxite (mainly $\mathrm{Al_{2}O_{3}}$) gives aluminium, and chalcopyrite yields copper. To win the metal, chemists crush the ore, concentrate it, then reduce it — usually by heating with carbon, which grabs the oxygen away.

For example

Bangladesh still imports most of its steel-making raw material, but in 2019 geologists reported a large iron ore deposit at Isabpur in Dinajpur — ore, rock rich in $\mathrm{Fe_{2}O_{3}}$, not metal yet.

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