IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Àárín
A week
Ìlànà
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.
Àwọn irinṣẹ́ tí a nílò:
Òkúta Tí Kò Tíì Dán
Ọkọ́
Ìbọ̀wọ́ Iṣẹ́ Awọ2
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Kábónéètì Kalisiọ̀mù - Òkúta Ẹfun Fífọ́100 kgÀwọn irinṣẹ́ tí a nílò:
Òòlù ńlá
Ewé gbígbẹ àti ìtànná
Igi Ìdáná
Èédú
Òǹwọ̀n ìdọ́gbaÌbọ̀wọ́ Iṣẹ́ Awọ
Gíláàsì ààbò3
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.
Àwọn irinṣẹ́ tí a nílò:
Ìluhò ỌrunỌkọ́Ìbọ̀wọ́ Iṣẹ́ Awọ4
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.
Àwọn irinṣẹ́ tí a nílò:
Ọkọ́-ìgé irinÒǹwọ̀n ìdọ́gba
Bàkẹ́tì irin oní ìdéríÌbọ̀wọ́ Iṣẹ́ AwọGíláàsì ààbò
Ìbòjú Eruku5
5
Lime from your stone
Lime from your stone
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
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