Refining

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Notion

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Science and technology

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What Wikipedia says

In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining the final material is chemically identical to the raw material.

Excerpt from the Wikipedia article “Refining (metallurgy)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Alfred T. Palmer, Public domain, via Wikimedia Commons.