Recycling of glaze waste through hydrocyclone separation

The particle size distributions of the separated glaze waste shifted towards the target values of < 5, 5-20, and > 20 μm, but were broad and overlapped slightly. A more efficient system would be required for the waste to be completely reusable. Selective agglomeration of glaze constituents was proposed to increase efficiency of separation by creating narrower, more distinct particle size distributions. Sedimentation and titration tests were used to estimate the isoelectric point of glaze constituents. Hypothetical calculations demonstrated that selective agglomeration could be used to significantly increase the sedimentation velocity of particles.