What is the melting point of potassium cryolite？

What is the melting point of potassium cryolite？

What is the melting point of potassium cryolite？

Potassium cryolite (potassium fluoroaluminate) : mainly used as a wear-resistant filling agent for resin grinding materials. Brazing of the bottom of stainless steel pot under high frequency heating and aluminum waveguide brazing, raw materials for the production of aluminum magnesium casting boron containing alloy; Aluminum alloy in addition to magnesium; As a flux for hot welding and brazing; Insecticides. Ceramic, glass industry raw materials.

Fluoride potassium aluminate

Aliases: potassium aluminum fluoride, potassium cryolite

English name: Potassium Hexafluoroaluminate

Molecular formula: K3ALF6

Molecular Weight: 258.24

Physical and chemical properties:

1: The color is white, off-white crystalline solid or powder.

2: Slightly soluble in water and hot ethanol, the aqueous solution is acidic, potassium cryolite melting point is 560 degrees.

3: can be decomposed into hydrofluoric acid, potassium salt and aluminum salt by strong acid.

4: easy to absorb water and damp.

Product use: mainly used as the raw material of aluminum and magnesium alloy casting, aluminum alloy in the casting process of deoxidizer and flux, etc. It can be used as the raw material for hot welding and brazing, ceramics and glass industry. It can be used as analytical reagent for chemical synthesis.

Packing: Packing with plastic inside and woven bags outside. There are three kinds of packaging: 25kg, 50kg and ton bags.

The reasons for using cryolite as the main body are as follows: 1. The cryolite does not contain metal impurities which are more correct than aluminum in precipitation potential (discharge potential). As long as the impurities are not brought in from the outside world, the pure aluminum can be obtained by electrolysis production. The cryolite can dissolve alumina well, and the solubility of alumina in cryolite solution is about 10%.3 when the electrolysis temperature is 950℃-970℃. At the electrolytic temperature, the density of cryolite alumina solution is lower than that of the liquid aluminum at the same temperature, and it floats on the liquid aluminum to oxidize aluminum, while making the electrolyte and aluminum better separated.4. The cryolite has the ability to conduct electricity so that the voltage drop in the electrolyte layer is not too high. The cryolite melt has a certain fluidity at the electrolytic temperature, and the positive **** gas can be discharged from the electrolyte, which is conducive to the circulation of the electrolyte. In the melting state, cryolite basically does not absorb water, volatile is not large, reduce material consumption and ensure the stability of electrolyte.