Granulated materi al and process for surface treatment of metal product using said granulated materi -al

摘要

Granulated means made of molten steel used to remove fouling formed on a surface of a metal product by means of a coating treatment comprise: a first group being a group of granulated means in which a particle diameter D1 belongs to a first D1max particle diameter segment = D1 amp;D1min and having a maximum P1 frequency in the first segment of particle diameter;And a second group being a group of granulated media where a particle diameter D2 belongs to a second segment of diameter of d2max particle = D2 amp;D2min and having a maximum P2 frequency in the second segment of particle diameter,Where the first group and the second group satisfy in relation to d1max = d2min,And a frequency distribution of particle diameter of the granulated media composed by the first group and the second group is substantially continuous.