Ngan Son - Bac Kan silver metallurgy workshop
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Factory 26/06 located at Lang Ngam commune, Ngan Son district, Bac Kan province: The location where the technology of multi-metal ores metallurgy according to traditional method: precipitation metallurgy, carbonization in vertical furnace and uninterupted reverbertory furnace. Especially, the technology of extracting gold using organic subtances; carbonization in vertical furnace according to density and temperature to extract different minerals in multi-metal ore. Both technologies above are applied for the first time in Vietnam.
