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Kaolin: China Clay Washed Out of Decomposed Granite
Kaolin, china clay, is granite whose felspar has rotted to a soft white clay. Washed in water, the fine clay stays suspended while sand and mica sink. Andrew Ure (1839) describes the Sèvres way: stir it hard in a cask, let the grit settle a few minutes, run the milky clay off through a very fine sieve and let it settle in covered vats.
The picture: the white china clay pit at Wheal Martyn, Cornwall.
Mwanzo
A day's washing, a week drying
Maagizo
1
1
Dig the rotted granite
Dig the rotted granite
Dig soft, white, crumbling granite where the felspar has turned to clay.
Vifaa kwa hatua hii:
Mwamba wa kaolini (granaiti iliyooza)50 kgZana zinazohitajika:
Sururu
Sepetu
Mizani ya mizani-mbili2
2
Stir it up in water
Stir it up in water
Put a charge in a barrel, run water in gradually and stir hard in every direction with a bar.
Vifaa kwa hatua hii:
Maji100 litaZana zinazohitajika:
Pipa la mbao
Fimbo ya Kukoroga3
3
Settle the grit, run off the clay
Settle the grit, run off the clay
Let it stand a few minutes so sand and mica sink. Pour or draw the milky water off just above the grit, through a very fine sieve, into a covered vat.
Zana zinazohitajika:
Ungo wa Matundu Membamba
Hodhi kubwa la mbao4
4
Settle and siphon
Settle and siphon
Leave the vat until the clay has settled and the water is clear, then siphon the water off. Wash the grit again for more clay.
Zana zinazohitajika:
Bomba la kunyonyaHodhi kubwa la mbao5
5
Dry and powder
Dry and powder
Spread the soft clay on plaster bats to stiffen, then dry it fully. Use it as a lump clay, or crush it fine and sift for kaolin powder. Store it dry.
Zana zinazohitajika:
Bamba la jasi la ufinyanzi
Kinu na mchiUngo wa Matundu Membamba
Chupa ya Kioo6
6
Your yield
Your yield
Inapakia daftari la Jupyter…
Zana Zinazohitajika
11- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.