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Quicklime Burned in a Rude Stone Kiln, Ure 1839
Limestone burned hot gives off carbonic acid and leaves quicklime. Andrew Ure (1839) describes the oldest kiln: a ring of rough stone walls filled with layers of fuel and broken limestone over brushwood, the top heaped into a cone and covered with sods so it burns slowly and evenly. Quicklime heats hard with water and burns the skin: keep it dry and wear gloves and glasses.
The picture: quicklime powder on a watch glass.
Katamtaman
A week
Mga Tagubilin
1
1
Build the ring
Build the ring
Build a ring of rough stones about 2 m across and 1 m high (ours) on bare ground, leaving a gap at the foot for air.
Mga kailangang kasangkapan:
Magaspang na bato
Pala
Guwantes na Katad Pangtrabaho2
2
Load it
Load it
Break the limestone into fist-sized pieces. Lay brushwood on the floor, then alternate layers of firewood and charcoal with layers of limestone, heaping the top into a cone.
Mga materyales para sa hakbang na ito:
Karbonatong Kalsyo - Dinurog na Apog100 kgMga kailangang kasangkapan:
Mabigat na maso
Tuyong dahon at pang-gatong
Panggatong
Uling
Timbangang panimbangGuwantes na Katad Pangtrabaho
Salaming pangkaligtasan3
3
Burn slowly
Burn slowly
Light the brushwood at the foot from a bow-drill ember. When the kiln is burning well, cover the cone with sods (cut turf), leaving the air gap open, so it burns slowly and evenly for several days.
Mga kailangang kasangkapan:
Barenang BusogPalaGuwantes na Katad Pangtrabaho4
4
Draw the lime
Draw the lime
When it has burned out and gone cold, open it up and rake out the burnt stones, which are now lighter and white. Weigh them and store dry in a lidded metal bucket.
Mga kailangang kasangkapan:
Kalaykay na bakalTimbangang panimbang
Timbang metal na may takipGuwantes na Katad PangtrabahoSalaming pangkaligtasan
Maskara Laban sa Alikabok5
5
Lime from your stone
Lime from your stone
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