With the competitiveness of rotarykiln equipment manufacturers becoming more and more intense, Energy- saving rotary kiln have come into being. The rotary kiln process equipment has a huge potential advantage. With the sharp rise in energy prices, in the mining equipment industry, Green lime rotary kiln with new technology is increasingly being favored by enterprises. The application of energy-saving and environment-friendly Rotary kiln with a vertical preheater and an upright cooler in the lime calcining process breaks the traditional pattern of lime rotary kiln production, and has been already recognized by many companies who are using lime rotary kiln. Therefore, the application of energy saving lime rotary kiln actually achieve the aim of energy-saving, high-efficiency and environment friendly. It is more advanced rotary kiln calcining process in active lime production field and worth further promoting.