Precio FOB
Obtener el precio más reciente0.13 ~ 1.99 USD / Piece
|5000 Piece Minimum Order
País:
China
N º de Modelo:
-
Precio FOB:
0.13 ~ 1.99 USD / Piece Obtener el precio más reciente
Lugar de origen:
-
Precio de pedido mínimo:
0.13 per Piece
Cantidad de pedido mínimo:
5000 Piece
Detalle de embalaje:
carton box with wooden pallet。
El tiempo de entrega:
stock item will be ship out within 1 weekï&fr
Capacidad de suministro:
50000 Piece per Month
Tipo de pago:
-
Grupo de productos :
Persona de contacto 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.
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.
| País: | China |
| N º de Modelo: | - |
| Precio FOB: | 0.13 ~ 1.99 / Piece Obtener el precio más reciente |
| Lugar de origen: | - |
| Precio de pedido mínimo: | 0.13 per Piece |
| Cantidad de pedido mínimo: | 5000 Piece |
| Detalle de embalaje: | carton box with wooden pallet。 |
| El tiempo de entrega: | stock item will be ship out within 1 weekï&fr |
| Capacidad de suministro: | 50000 Piece per Month |
| Tipo de pago: | - |
| Grupo de productos : | Cupels |
