Precio FOB
Obtener el precio más reciente700 ~ 850 USD / Metric Ton
|1 Metric Ton Minimum Order
País:
South Korea
N º de Modelo:
-
Precio FOB:
700 ~ 850 USD / Metric Ton Obtener el precio más reciente
Lugar de origen:
-
Precio de pedido mínimo:
700 per Metric Ton
Cantidad de pedido mínimo:
1 Metric Ton
Detalle de embalaje:
25*40 plastic woven bag in 1MT big bag
El tiempo de entrega:
Within 14days afrer order confirmed
Capacidad de suministro:
2000 Metric Ton per Month
Tipo de pago:
D/P, D/A, L/C, T/T
Grupo de productos :
-
South Korea
Persona de contacto Mr. Bruce
Other
Synthetic Cryolite Na3AlF6 & Sodium Fluoroaluminate Artificial Cryolite
How to produce Cryolite
Cryolite is the main constituent of the electrolyte used in alumina electrolysis. Chemically it is Na3AlF6, a double fluoride of sodium and aluminium. It is a white granular powder. Certain impurities may give it a grey or pink discoloration. The freezing point of cryolite is ***9°C.
Synthetic Cryolite is made from fluorspar (CaF2), which is found as a natural mineral. Fluorspar is treated with sulphuric acid to produce hydrofluoric acid HF.
CaF2 +H2SO4 = 2HF (g) +CaSO4 (s) (3)
HF is then reacted with sodium oxide Na2O and alumina to produce cryolite.
Cryolite ratio= Molar Ratio of NaF
Molar Ratio of Alf3
1. Physical and chemical properties of synthetic cryolite:
The product is a white crystalline powder or a sandy-size granularity, and a pinkish crystalline powder or a sandy-size granularity as well. Sp.gr.2.*5—3.*5g/cm3, melting point about ***5°C, specific heat 1.**6j/g°C at *8—**0°C. Its slightly soluble in water, but insoluble in anhydrous hydrogen fluoride. The content of its crystal water will be decreased while the increasing of the molecular ratio, therefore its loss on ignition will be also decreased while the increasing of the molecular ratio. After the paste of synthetic cryolite with different molecular ratio dehydrates, the loss on ignition at **0°C will appear *0.*4%, 6.*2% and 2.*6% when the molecular ratio reaches 1.*4, 2.*4 and 2.*3 reactively.
2. Applications:
Metal surface treatment: As component in pickling pastes for
stainless steel.
Production of abrasives: As active filler in resinbonded
adrasives for metal treatment.
Production of enamel, glazing frits and glass: As abrasives,
opacifying agent.
Production of soildering agent: Component for fluxing
agent.
Production of welding agent: Component of weilding rod coatings
and welding powders.
Aluminum-metallurgy: As component of fluxing agents, protective
and refining salts
3. Specification :
| País: | South Korea |
| N º de Modelo: | - |
| Precio FOB: | 700 ~ 850 / Metric Ton Obtener el precio más reciente |
| Lugar de origen: | - |
| Precio de pedido mínimo: | 700 per Metric Ton |
| Cantidad de pedido mínimo: | 1 Metric Ton |
| Detalle de embalaje: | 25*40 plastic woven bag in 1MT big bag |
| El tiempo de entrega: | Within 14days afrer order confirmed |
| Capacidad de suministro: | 2000 Metric Ton per Month |
| Tipo de pago: | D/P, D/A, L/C, T/T |
| Grupo de productos : | - |
