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manganese is essential to iron and steel production

Blast furnace - Wikipedia

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being "forced" or supplied above atmospheric pressure.

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Glossary | APEC Water

Cadmium A minor metallic element naturally occurring in the earth's crust and waters. Cadmium used to be used as a pigment for corrosion resistant plating on steel while cadmium compounds were used to stabilize plastic.

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