Secondary ripening of raw material

People from a granulator factory in our company talked a lot, and one of the functions was secondary ripening, which I didn't hear. The one who understood and gave advice-- I think there should be a process of high temperature and high pressure during granulation, which can be regarded as ripening. Maybe quenching and tempering twice? Secondary granulation is secondary ripening.-- I also want to know who can explain it more clearly.