The Ancient India and its amazing technology of metallurgy.
Zinc is the most difficult to smelt since zinc volatalises at about the same temperature of around 1000°C to smelt zinc ore. As a result it would form as a vapour in the furnace which would immediately get reoxidise.
Zinc is the most difficult to smelt since zinc volatalises at about the same temperature of around 1000°C to smelt zinc ore. As a result it would form as a vapour in the furnace which would immediately get reoxidise.
However in India there is unique evidence for the extensive and semi-industrial production of metallic zinc at the Zawar area of Rajasthan. The mines of Rajasthan have given definite evidence of zinc production going back to 6th Century BC.
Just think about it.
Just think about it.
An ingenious method was devised of downward distillation of the zn vapour formed after smelting zn ore using specifically designed retorts with condensers and furnaces, so that the smelted zinc vapour could be drastically cooled down to get a melt that could solidify to zn metal.
The Rasaratnakara, a text ascribed to the great Indian scientist Nagarjuna, describes this method of production of zinc.
From India in 16th century this reached to china and from china in 1740 it reached to Europe.
From India in 16th century this reached to china and from china in 1740 it reached to Europe.
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