Abstract The effects of particle size on the apparent kinetics carbothermal reduction process phosphate rock were studied by non-isothermal thermogravimetric analyses. Phosphate various was reacted with coke and silica under high purity argon atmosphere. kinetic model parameters reaction different sizes derived combination model-free (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, Tang, Starink) m...

Abstract This work focuses on the grain size reduction induced by ball milling in individual minerals and binary mixtures containing quartz a softer mineral. All investigated mineral undergo significant monotonic decrease upon mechanical processing. The rate at which process occurs decreases with hardness of phase. Hardness is shown to play crucial role also case mixtures. final attainable as w...