... an indispensable non-ferrous materials windely used in high scentific and technological fields. Such as aviation, aerospace,naturai-gas, ... minerai oil,iron-steel desulphurization,defence industry,metallurgy and so on .1.Appearance of Mg Powder(Granules): ... Silver white granule shapes,round shape,round shape and diamond shape; B.Without lump and sundrie in finished products. C.Sizing scope ...