satafluxes

Adding a small amount of fluorine salts such as NaF,Na3AlF6,CaF2 to the chloride salts, mainly for refining such as absorption melting Al2O3, fluoride salts can also effectively remove the oxide film on the surface of the melt, improving the effect of degassing, the reasons are follows: 1. Fluoride can be separated from aluminium melt and chemically react to form gaseous AlF,SiF4,BF3 etc, they promote the separation of oxide film from aluminium melt by mechanical action, squeeze the oxide film and push it into the solvent. 2. The current generated at the interface where the above reaction occurs also causes the oxide film to be “washed out” and broken. Therefore, the presence of fluorine salts accelerates the destruction process of the oxide film on the surface of the aluminium melt, and the hydrogen in the melt can more escape conveniently. 3. Chloride salts, especially CaF2 can increase the surface tension of the mixed molten salts, make the molten salt of the adsorbed oxide sphero...

    1. Sponge processing process   The first is the selection of sponge, because each sponge body may have different mesh even if the same batch of sponges, the mesh standard must be carefully checked before processing; the second is that the cutting size of sponge should be accurate; and finally, the processed sponge products should be guaranteed to have no inclination.       2. Size mixing process   The formula selection must ensure the best condition of the consistency and fluidity of the slurry, so as to ensure that the ceramic foam filters for casting  in the sizing process can be evenly sized and reach the required sizing weight.   3. Sponge modification process   Sponge modification is to prepare for the sizing process, improving the hanging performance of sponge and making a sizing uniform.   4. Dip sizing process   The modified dry sponge products are evenly coated into green bodies by the adjusted slurry on the roller...