Drying of sugar cane bagasse was theoretically and experimentally studied in a cyclone. The experiments were carried out using hot air as drying agent. The influence of the cyclone conical part was studied. It was shown that the conical part has a great influence on the particle residence time and, consequently, on moisture reduction. Experimental results were alike industrial ones. CFX 4.44 from AEA Technology was used to simulate some experiments. Simulated and experimental results were close and showed that the presented model leads to a good prediction.