Now technically on the basis of continuous improvement, we have found from the Rotary Kiln temperature control using a mobile hotbed effect of temperature is much better than the other.Bed temperature difference value with a number of factors.Today about the related changes in this medium. In the axial direction of the Rotary kiln, the rolling average bed temperature close to the temperature of the Rotary kiln wall trends.The bed and the temperature difference between the position near the Rotary kiln exceed 100 ℃.The highest temperature Rotary kiln wall (r = 120mm).Farther away from the wall, the lower the temperature.This suggests that in this experiment is mainly regenerative heat exchanger.Preliminary calculations show that the effective heat transfer coefficient of gas to solid 30W / m / K, while the wall-to-solid 100W / m / K.However, when the material is further through the Rotary kiln, the temperature difference becomes smaller bed, position 3 and position 4 are the temperature was 37 ℃ and 17 ℃.