UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Expanded Perlite: Volcanic Glass Puffed in a Minute of Fierce Heat
Perlite is a volcanic glass with water locked inside. Heated fast into its softening range, the water turns to steam and puffs each grain up to 7–16 times its volume, brilliant white and light (Wikipedia). The U.S. Bureau of Mines (1946) found that grains up to ¼ inch need only 1 to 3 minutes at the right heat, somewhere between 1,600 and 2,600 °F depending on the ore.
The picture: expanded perlite (photo by KENPEI, Wikimedia Commons, CC BY-SA 3.0).
Hagati
A few hours
Amabwiriza
1
1
Crush and size
Crush and size
Break the perlite ore into grains no bigger than ¼ inch and sieve out the large pieces.
Ibikoresho by'iyi ntambwe:
Amabuye ya Perlite1 kgIbikoresho bikenewe:
Inyundo y'ukuboko
Uruyungurura runini2
2
Heat it fast
Heat it fast
Heat the kiln first. Drop a thin layer of grains in on a hot dish for 1 to 3 minutes, then take them out. Slow heating does not work.
Ibikoresho bikenewe:
Itanura
Isahani ntoya
Ifashi rifite imikondo miremire
Uturindantoki two gukomeza ibyuma3
3
Find your ore's heat
Find your ore's heat
Each ore has its own heat, between 1,600 and 2,600 °F. Too cool and it hardly puffs; hotter puffs it more. Too hot and it melts, lets the gas out, and shrinks back to dense slag. Test small lots first.
Ibikoresho bikenewe:
ItanuraIsahani ntoyaIfashi rifite imikondo miremire4
4
Float off the duds
Float off the duds
Tip the cooled grains into water. The expanded ones float; grains that did not expand sink. Skim the floaters off and dry them.
Ibikoresho bikenewe:
Indobo
AmaziIbikoresho
1- Umwanya
Iki gishushanyo gikora
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.