Traditional Chinese Cinnabar Refining: Traditional Production Process & Complete Practical Guide

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Cinnabar (natural cinnabar, the main component is mercury sulfide HgS) is the source material of Chinese Waidan. The first criterion for judging "Elixir" by the ancients was that it is "red in color and does not fade with time". In modern times, it is the ocher red color and high hardness of mercury sulfide. Natural cinnabar ore needs to be crushed and water-flyed (wet grinding and suspension separation) to remove the gangue and free mercury, and then the fine powder is obtained and then placed in a crucible for airtight roasting. Artificial preparation of "dan" adopts two routes: "rising dan" and "falling dan": rising dan is the co-heating of sulfur and mercury, and the sulfur snatches mercury to form red mercury sulfide crystals that rise into the upper condensation zone; falling dan is supplemented with saltpeter, alumite, etc. as a flux, so that the reactants condense downward into yellow-red particles. The key process parameter is the heat: …

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