Trevellas Coombe Upper Calciner |
| Hob Uid: 1457066 | |
Location :
Cornwall
St. Agnes
|
| Grid Ref : SW7285005156 |
| Summary : Trevellas Coombe Upper Calciner is an early type (exact date is unknown) of reverberatory calciner used for the extraction of arsenic from tin ore. It is externally intact and roofed and considered to be the most externally-complete example known to survive in Cornwall. It is now in use as an outhouse of a private residence and is believed to be internally well preserved. Calciners were structures used to extract arsenic from mined ores by controlled heating. By heating the ore under oxidising conditions the arsenic content could be sublimed off as a vapour, which cooled and condensed to form a white 'soot' or powder. The refined arsenic had a variety of uses such as: metal alloy, clarifying glass, medicinal purposes and to create pigment in paint.Trevellas Coombe is contained within the World Heritage Site of the Cornwall and West Devon Mining Landscape. |
More information : Trevellas Coombe Upper Calciner is an early type (exact date is unknown) of reverberatory calciner used for the extraction of arsenic from tin ore. It is externally intact and roofed and considered to be the most externally-complete example known to survive in Cornwall. It is now in use as an outhouse of a private residence and is believed to be internally well preserved. [1]
Calciners were structures used to extract arsenic from mined ores by controlled heating. By heating the ore under oxidising conditions the arsenic content could be sublimed off as a vapour, which cooled and condensed to form a white 'soot' or powder. The refined arsenic had a variety of uses such as: metal alloy, clarifying glass, medicinal purposes and to create pigment in paint. [2]
Trevellas Coombe is contained within the World Heritage Site of the Cornwall and West Devon Mining Landscape. [3] |