FOB Price
Get Latest Price700 ~ 850 USD / Metric Ton
|1 Metric Ton Minimum Order
Country:
South Korea
Model No:
-
FOB Price:
700 ~ 850 USD / Metric Ton Get Latest Price
Place of Origin:
-
Price for Minimum Order:
700 per Metric Ton
Minimum Order Quantity:
1 Metric Ton
Packaging Detail:
25*40 plastic woven bag in 1MT big bag
Delivery Time:
Within 14days afrer order confirmed
Supplying Ability:
2000 Metric Ton per Month
Payment Type:
D/P, D/A, L/C, T/T
Product Group :
-
South Korea
Contact Person 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 :
| Country: | South Korea |
| Model No: | - |
| FOB Price: | 700 ~ 850 / Metric Ton Get Latest Price |
| Place of Origin: | - |
| Price for Minimum Order: | 700 per Metric Ton |
| Minimum Order Quantity: | 1 Metric Ton |
| Packaging Detail: | 25*40 plastic woven bag in 1MT big bag |
| Delivery Time: | Within 14days afrer order confirmed |
| Supplying Ability: | 2000 Metric Ton per Month |
| Payment Type: | D/P, D/A, L/C, T/T |
| Product Group : | - |
