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ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
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ÀWỌN OHUN WÍWỌ̀
Plumbago Crucibles: Fire Clay, Coke and Graphite, Ure 1839
Crucibles must stand sudden heating and cooling without cracking. Andrew Ure (1839) gives the best as pure fire clay with ground old crucibles, black lead (graphite) and some coke: a Berlin mix of 8 parts clay and cement, 5 of coke and 4 of graphite stood 23 meltings of 76 lb of iron each. Mix it like a pottery body, press it into crucibles, dry them slowly and fire them.
The picture: used graphite crucibles.
Ilọsíwájú
A week with drying
Ìlànà
1
1
Grind and sift
Grind and sift
Pound the coke and the plumbago fine and sift them; sift the grog.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Èédú metalurgi1 kg
Graphite àdánidá1 kg
Grog (ìkòkò tí a díná tí a lọ̀)0.5 kgÀwọn irinṣẹ́ tí a nílò:
Odó àti Ọmọ Odó
Ajọ Ojú Kékeré
Ìbòjú Eruku2
2
Mix the body
Mix the body
Measure by bulk 8 parts fire clay with grog, 5 parts coke and 4 parts graphite (Ure's Berlin mix). Mix dry, then add water and knead to a stiff dough as for pottery.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Amọ̀ Tí Ń Fara Da Iná2 kg
Omi1 lítàÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Bàkẹ́ẹ̀tì3
3
Form the crucibles
Form the crucibles
Press the dough hard into a mould round a wooden former, or over a tapered former, keeping the walls even and not too thick; ease each crucible off and trim the rim.
Àwọn irinṣẹ́ tí a nílò:
Òòlù Igi
Ọ̀bẹ iṣẹ́4
4
Dry slowly
Dry slowly
Dry them slowly in a warm room for several days, turning them now and then, until no moisture is left.
Àwọn irinṣẹ́ tí a nílò:
Àká Ìgbẹ5
5
Fire
Fire
Bake them in the kiln, raising the heat slowly. Store them dry and warm each before first use.
Àwọn irinṣẹ́ tí a nílò:
Ààrò oníná gíga6
6
Ure's Berlin mix
Ure's Berlin mix
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
5- 1 kgÀyè
- 1 kgÀyè
- Àyè
- Àyè
- 1 lítàÀyè
Ìtọ́nisọ́nà yìí ń ṣe
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