A rotary dryer is a type of industrial equipment used to reduce the moisture content of materials. It consists of a rotating cylindrical drum that tumbles the material while hot air is passed through it. This process helps to evaporate moisture, making the material easier to handle and store. These dryers are commonly used in various industries, including agriculture, mining, and construction, to dry products like grains, minerals, and wood chips. The efficiency of a rotary dryer is influenced by factors such as temperature, airflow, and the material's characteristics, ensuring optimal drying performance.