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Synthetic Cryolite

South Korea

-

700 ~ 850 / Metric Ton 获取最新报价

-

700 per Metric Ton

1 Metric Ton

25*40 plastic woven bag in 1MT big bag

Within 14days afrer order confirmed

2000 Metric Ton per Month

D/P, D/A, L/C, T/T

-

现在联系

产品规格

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详情

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 1009°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.

CaF+H2SO= 2HF (g) +CaSO(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.2.95—3.05g/cm3, melting point about 1025°C, specific heat 1.056j/g°C at 18—100°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 800°C will appear 10.34%, 6.22% and 2.56% when the molecular ratio reaches 1.74, 2.14 and 2.63 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 :

 

Ingredient

Super

First grade

Second grade

F%≥

53

53

53

Na% ≥

32

32

32

Al≥

13

13

13

H2O%≤

0.4

0.5

0.8

SiO2≤

0.25

0.36

0.4

Fe2O3%≤

0.05

0.08

0.10

SO4%≤

0.7

联系我们

联系人:Mr. Bruce

公司名称:Luoyang Ruitu Refractories And Abrasives

办公地址:Other, South Korea,

电话号码:

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Mr. Bruce < Luoyang Ruitu Refractories And Abrasives >
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