Cristóbal Pérez has more than a decade of mineral processing experience. He has received a PhD in Minerals Engineering in Universidad Autónoma de San Luis Potosí (UASLP), México. With his experience in comminution and ball mills, he has developed computational tools (DEM) to improve design and operation conditions related to ball mills. He currently works as a professor in UASLP, México. Cristóbal Pérez also speaks at various conferences. He can be reached at cristobal.perez@uaslp.mx