This is a set of Matlab .fig files corresponding to the figures in the paper 'Experimental gas-fluidized bed drying study on the segregation and mixing dynamics for binary and ternary solids' published in Chemical Engineering Journal. In this study, experiments in a pseudo-2D fluidized bed setup were performed to obtain insight in the complex and changing bed hydrodynamics and its interplay with mass and heat transfer. The data was obtained by using a combined Particle Image Velocimetry (PIV), Digital Image Analysis (DIA) and Infrared (IR) technique. Furthermore, a machine learning algorithm was applied in order to determine the segregation and mixing dynamics. The dataset consists of the following .fig files whereof a short description is given below: Figure 3: Minimum fluidization velocity determination using the mean pressure drop over the bed. Figure 4: Precision-recall analysis Figure 8: Segregation index based on the average height of the medium and large-sized solids.Figure 9: Segregation index based on the average height of the medium and large-sized solids.Figure 10 A, B, C and D: Time-averaged solids volume fluxes for the u0=0.975 m/s drying case at four different times.Figure 11 A, B, C and D: Time-averaged solids volume fluxes for the u0=1.17 m/s drying case at four different times.Figure 12 A, B, C and D: Time-averaged solids volume fluxes for the u0=1.365 m/s drying case at four different times.Figure 13 A and B: Mean particle temperature and standard deviation over time for the three different superficial gas velocities. Figure 17 A and B: Segregation indices based on the average height of the small, medium and large-sized solids.Figure 18 A, B, C and D: Time-averaged solids volume fluxes for the u0=0.7875 m/s drying case at four different times.Figure 19 A, B, C and D: Time-averaged solids volume fluxes for the u0=0.945 m/s drying case at four different times.Figure 20 A, B, C and D: Time-averaged solids volume fluxes for the u0=1.1025 m/s drying case at four different times.Figure 21 A and B: Mean particle temperature and standard deviation over time for the three different superficial gas velocities.