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

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

Potassium tetrafluoroaluminate is a white or light grey powder crystal, and the composition is usually nKF·AlF3, and n is usually 1 ~ 3.
In industry, potassium fluoaluminate is commonly known as potassium cryolite, which is often expressed as KAlF4 and molecular weight 142.
K3AlF6, molecular weight 258.
Potassium cryolite slightly soluble in 1 at 25 ℃.
429 g / 1000 gl, 100 4 ℃.
85g, which can react with water to release hydrogen fluoride at high temperature;
It can also be slowly dissolved in the strong acid to release hydrogen fluoride.
Potassium cryolite has been widely used in various sectors of the economy, and its main applications are: aluminum, aluminum alloy and stainless steel flux.
Composite solvent components of aluminum alloy smelting and purification treatment;
Insecticides.
Ceramic and glass industrial raw materials;
Additives in grinding wheels and abrasives (epidemic materials);
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;

Microscopical features: colorless, non - cleavage, homogeneous and negative.