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Barium Sulphide: Heavy Spar Roasted with Coal
Barium sulphide is the barium half of lithopone, the white pigment. Thorpe (1912): roast 100 parts of heavy spar with 20 parts of coal slack or charcoal. Caking bituminous coal soaks through the mass and reduces it completely; with charcoal, mix very thoroughly. The roasted mass still holds carbon and some unchanged spar: hot water takes out the barium sulphide. Left in air it turns to carbonate and smells of rotten eggs, so keep it closed.
The picture: our own drawing.
Ophakathi
1 day
Imiyalelo
1
1
Grind and mix
Grind and mix
Grind 100 g of heavy spar and 20 g of bituminous coal slack and mix them very thoroughly.
Izinto zokwakha zalesi sinyathelo:
I-Barite (Itshe Elisindayo)100 gAmathuluzi adingekayo:
Amalahle e-bituminous
Isigqulo Nomgqulo
Isikali sesilinganiso2
2
Roast
Roast
Roast the mixture in a crucible in the furnace. The coal cakes and runs through the mass, reducing the spar.
Amathuluzi adingekayo:
Imbiza Yobumba Ejulile
Isithando Samalahle
Amagilavu Esikhumba3
3
Cool and close it up
Cool and close it up
Let it cool and put it straight into an airtight jar. It holds spare carbon and some unchanged spar; hot water dissolves out the barium sulphide when you use it.
Amathuluzi adingekayo:
Amajeke Engilazi Emnyama Anezivalo Ezingangeni MoyaAmagilavu EsikhumbaIzinto
1- Isibambeli
Amathuluzi Adingekayo
7- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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