Phosphate Rock Processing - EPAthose phosphate rock processing operations associated with fertilizer manufacture are discussed here. Florida and North .. The major emission sources for phosphate rock processing are dryers, calciners, and grinders. .. control device, and ground rock is generally conveyed in totally enclosed systems with well defined.grinding system for rock phosphate,Phosphate Rock, RSA Colemanite, Turkey Aragonite, Italy . - Loeschewho operate obsolete or inefficient grinding systems. • whose processing plants no longer comply with the ecologi- cal requirements. • whose space requirement for the building of complete plants or modernisation of plant parts is limited. Loesche Mill Type LM 46.4, Lengerich, Germany, 2003. Loesche Mill Type LM 60.4,.