The melting point of cryolite is 1009 ℃, and the melting point of cryolite alumina molten salt is only 930 ℃ ~ 1000 ℃. The quality requirements of cryolite in industry are very high. Most cryolite is used in aluminum industry, and a few cryolite is used in other industries. At present, the amount of cryolite consumed in the world is very large, and the annual consumption is about dozens of tons. The application of potassium cryolite in ceramics. At present, the market sales volume of cryolite as electrolytic aluminum smelting is more than ten tons. Cryolite must be in sodium aluminum molecular ratio, impurity content Water content and other aspects meet certain requirements.
In the process of electrolytic aluminum, where to buy cryolite is cheap. The larger the ratio of sodium to aluminum in cryolite, the better, the higher the molecular ratio, the less fluorine loss and the less environmental pollution. Moreover, polymer is more suitable for other industries except aluminum industry than cryolite; Another important requirement is that the content of silicon oxide, iron oxide and other impurities of cryolite in industrial production should be less. The existence of these impurities directly affects the quality of aluminum ingot and the current efficiency of aluminum smelting; Therefore, we must pay attention to this problem in the production process. What is the melting point of potassium cryolite? Secondly, the higher the water content of cryolite, the smaller the better. Cryolite, because more water content of cryolite will accelerate the consumption of cryolite.
The reasons for using cryolite as the main body are as follows: 1 Cryolite does not contain metal impurities whose precipitation potential (discharge potential) is higher than that of aluminum. As long as impurities are not brought in from the outside, more pure aluminum can be obtained by electrolytic production. 2 Cryolite can better dissolve alumina. When the electrolysis temperature is 950 ℃ - 970 ℃, the solubility of alumina in cryolite solution is about 10% At the electrolysis temperature, the density of cryolite alumina solution is lower than that of liquid aluminum at the same temperature. It floats on the liquid aluminum to oxidize aluminum and better separate electrolyte and aluminum. 4 Cryolite has certain conductivity, so that the voltage drop of electrolyte layer is not too high. 5 Cryolite melt has a certain fluidity at the electrolysis temperature, and the positive gas can be discharged from the electrolyte, which is conducive to the circulation of the electrolyte. 6 In the molten state, cryolite basically does not absorb water and has little volatility, which reduces material consumption and ensures the stability of electrolyte.
The melting point of potassium cryolite is 560 ℃. Replacing traditional cryolite with potassium cryolite can effectively reduce the dust generated by resin grinding wheel in the process of grinding and cutting, which is conducive 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 its pH is about 7. It can effectively play its role in grinding and abrasive, improve the grinding speed of grinding wheel and improve the working speed of 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 potassium cryolite production, but also has strong price advantage and market competitiveness.
