4. Specialized metallurgical processes, compositions for use therei
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Extraction of zinc and lead from their sulfides

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent

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Extraction or recovery of non-ferrous metal values from arsenic-

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent

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Extraction process for removing metallic impurities from alkalid

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
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Extractions of copper from solutions by reduction with anthraqui

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
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