Prix FOB
Obtenir le dernier prix0.13 ~ 1.99 USD / Piece
|5000 Piece Minimum Order
Pays:
China
N ° de modèle:
-
Prix FOB:
0.13 ~ 1.99 USD / Piece Obtenir le dernier prix
Localité:
-
Prix de commande minimale:
0.13 per Piece
Commande minimale:
5000 Piece
Packaging Detail:
carton box with wooden pallet。
Heure de livraison:
stock item will be ship out within 1 weekï&fr
Capacité de Fournir:
50000 Piece per Month
Payment Type:
-
Groupe de produits :
Personne àcontacter Ms. Bonnie
Room 608, Sunrising Building, No.68 Bayi Street, Changsha, Hunan Province, China., Changsha, Hunan
1. Made of high
quality magnesia / bone ash.
2. Used for
smelting and assaying.Â
3. High thermal
shock resistance.
During
cupellation, the lead is oxidized to litharge (PbO), most of which
is absorbed by the cupel. Gold, silver, platinum and other precious
metals form a bead in the cupel.
The bead is
subsequently treated to determine its precious metal content.
Cupels are typically made from magnesia MgO ( sometimes mistakenly
referred to as magnesite), bone ash, Portland cement and other
materials.
Typical
cupellation furnace temperatures in gold and silver assays are
*******0°C, but can vary with technique, air flow volume and cupel
material.
Cupellation is
the last and most important step of the fire assaying process and
as such, the quality of the cupels is extremely
important.
Â
| Pays: | China |
| N ° de modèle: | - |
| Prix FOB: | 0.13 ~ 1.99 / Piece Obtenir le dernier prix |
| Localité: | - |
| Prix de commande minimale: | 0.13 per Piece |
| Commande minimale: | 5000 Piece |
| Packaging Detail: | carton box with wooden pallet。 |
| Heure de livraison: | stock item will be ship out within 1 weekï&fr |
| Capacité de Fournir: | 50000 Piece per Month |
| Payment Type: | - |
| Groupe de produits : | Cupels |
