This paper presents data on the study of grinding processes of a graphite mixture using various processing technologies in vortex layer devices and planetary mills. The studies were carried out using methods of laser analysis of particle size distribution, scanning electron microscopy and X-ray phase analysis. Processing the graphite mixture in a Pulverisette 7 planetary mill for 60 min was found to lead to the formation of polydisperse graphite particles characterized by a wide bimodal size distribution with pronounced maxima at 12 and 24 μm, respectively. We showed that processing the graphite mixture in the devices of vortex layer AVS-80 and UAP-3 in 10 min makes it possible to obtain finely dispersed graphite particles with maxima of the size distribution at 13 and 11 μm respectively, which indicates the advantage and efficiency of this technology as compared to the case of grinding the graphite mixture in the planetary mill.