CaF2:80% or more
Si02:less 8%
C :Less 1%
Bi/SN/Sb less 0.001%
Water : less 0.8%
S : less 0.15%
Pb/P: less 0.04%
CaO: less 0.6%
AL: less 0.008%
Block size 2-4cm, particle size less than 1cm is powder, the total amount of powder, slag, stone and other impurities does not exceed 2%.