Abstract: In order to improve utilization rate of coal slime and reduce environmental pollution, the low-temperature-steam rotary-drum drying technology is introduced at Jining No. 3 Coal Preparation Plant. An introduction is made in the paper to the working principle and effect of its field application. As viewed from the effect of its industrial application, the drying technology enjoys the unique advantages in the aspects of waste heat utilization and clean production and has a good application prospect.