Traditional Chinese Alchemy Furnace & Ding Vessel: Ceramic Moulds, Iron Crucibles and Water-Fire Temperature Control
In short: Traditional Chinese Alchemy Furnace: Traditional Production Process & Complete Practical Guide. This entry documents a production process taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 1802 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
The alchemy furnace is the only device that has left a large amount of physical evidence of external alchemy. A standard "Bagua furnace" consists of a furnace body (pottery or refractory bricks), a furnace, a grate (charcoal-bearing grille), a flue, and a top cover; the tripod (reaction vessel) is divided into upper and lower parts, which can be snapped together and sealed - the upper one is "covered" for the sky, the lower one is "up" for the ground, and the middle interlayer is the reaction area. Typical structure: The belly of the tripod is filled with medicinal materials, the lid of the tripod and the tripod body are matched with the "mother and sub-mouth", and the outer periphery is sealed with soil (added with hair strands and glutinous rice paste), which is called "Guji". Mercury or water is injected between the furnace charcoal fire and the tripod as a heat conduction medium, forming two heating modes: water bath (slow fire) and direct roasting (wuhuo). The essence of temperature control: There were no thermometers in ancient times, and judgments were based on "fire marks" - charcoal color (dark …
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