Introduction and market application of potassium fluoaluminate (potassium cryolite) performance

Potassium tetrafluoroaluminate is white or light grey powder crystal, and the composition is usually nKF· AlF3, usually 1 ~ 3.In industry, potassium fluoroaluminate is commonly referred to as potassium cryolite, which is often expressed as KAlF4, molecular weight 142.K3AlF6, molecular weight 258.Potassium cryolite slightly soluble in 1 at 25 ℃.429 g / 1000 gl, 100 4 ℃.85g. Hydrogen fluoride can be released at high temperature.It can also slowly dissolve in strong acid to release hydrogen fluoride.Potassium cryolite has been widely used in various sectors of the economy. The main applications are: aluminum, aluminum alloy and stainless steel soldering flux.Composite solvent components of aluminum alloy smelting and purification treatment;Insecticides.Ceramic and glass industrial raw materials;Additives (epidemic materials) in grinding wheel and friction agent;Steel melting materials;And so on.Potassium cryolite melting point 560 ℃, cubic system, a = 8.093 , no cleavage, hardness is 2.5. Density 3000kg/m3;Microscopic features: colorless, uncleavable, homogeneous and negative.