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What is the melting point of cryolite and that of potassium cryolite?

What is the melting point of cryolite and that of potassium cryolite?


What is the melting point of cryolite and that of potassium cryolite
The melting point of cryolite is 1009°C, and the melting point of cryolite-alumina molten salt is only between 930°C and 1000°C. Cryolite has high quality requirements in the industry. Most cryolite is used in the aluminum industry, and a few cryolite is used in other industries. At present, the world consumes a large amount of cryolite, and the annual consumption is about It is dozens of tons, the application of potassium cryolite in ceramics. The current market sales volume of cryolite as electrolytic aluminum smelting is more than ten tons. Cryolite must meet certain requirements in terms of sodium-aluminum molecular ratio, impurity content, and water content. 


In the process of aluminum electrolysis, where to buy cryolite is cheap, the ratio of sodium to aluminum in cryolite should be the larger the better, the higher the molecular ratio, the better, the less the loss of fluorine, the smaller the environmental pollution caused, and the higher the polymer ratio Cryolite is more suitable for use in industries other than the aluminum industry; another important requirement is that cryolite contains less silicon oxide, iron oxide and other impurities in industrial production. The presence of these impurities directly affects aluminum ingots. The quality of aluminum and the current efficiency of aluminum smelting; therefore, we must pay attention to this problem during the production process. What is the melting point of potassium cryolite? Secondly, the water content of cryolite should be as high as possible. Cryolite, because cryolite has more water content. Will speed up the consumption of cryolite.
The reasons for using cryolite as the main body are: 1. Cryolite does not contain metal impurities whose precipitation potential (discharge potential) is more positive than that of aluminum. As long as no impurities are brought in from the outside world, electrolytic production can obtain purer aluminum. 2. Cryolite can It dissolves alumina well. When the electrolysis temperature is 950℃-970℃, the solubility of alumina in cryolite solution is about 10%. 3. At the electrolysis temperature, the density of cryolite-alumina solution is higher than that of aluminum at the same temperature. The density of the liquid is small. It can oxidize the aluminum by floating on the aluminum liquid, and at the same time make the electrolyte and aluminum better separate. 4. Cryolite has a certain conductivity, so that the voltage drop of the electrolyte layer will not be too high. 5. Ice crystals The rock melt has a certain fluidity at the electrolysis temperature, and the positive gas can be discharged from the electrolyte, which is beneficial to the circulation of the electrolyte. 6. In the molten state, cryolite basically does not absorb water, and the volatility is not large, and the drop is reduced. Material consumption and ensure the stability of electrolyte.
The melting point of potassium cryolite is 560 degrees Celsius. Replacing traditional cryolite with potassium cryolite can effectively reduce the dust generated by the resin grinding wheel during the grinding and cutting process, which is beneficial to environmental protection and improving the sanitary conditions of the workplace.
Due to the special composition and chemical structure of potassium cryolite, it is neutral and has a pH of about 7, which can effectively play its role in grinding and abrasives, increase the grinding speed of the grinding wheel, and increase the working speed of the grinding wheel.
The price of potassium cryolite is higher than that of traditional cryolite, which is its disadvantage. However, potassium cryolite, a by-product of aluminum-titanium-boron grain refiner manufacturers, not only has the same quality as professional potassium cryolite, but also has a strong price advantage and market competitiveness.