[1] Gao Changming: Vertical mill – the first preferred grinding equipment in current cement industry [J]. China Cement, 2003 (7), pp. 45-46

[2] Zhao Jihui, Wang Dongmin, Wang Xueguang: Progress in Grinding Technology of High-efficient Energy Conservation in Modern Cement Industry [J]. China Powder Science and Technology, 2013, 19 (4), pp. 32-39

[3] Zhang Luming: Development State of VRMs in the World and Design and Operation of the LGMS4624 Model Slag VRM (I) [J]. Mining & Processing Equipment, 2008 (3), pp. 65-69

[4] Tao Congxi, Zhao lin, Yu Weimin, et al.: Research Progress in Technology and Equipments of Energy-economize and Contamination-control in Cement Industry[J]. Bulletin of the Chinese Ceramic Society, 2009, 28 (5), pp. 980-985

[5] Sun Lei, Wu Han, Zhu Xiaobin, et al.: Measures to increase production and reduce consumption of raw material vertical mill system [J]. Cement, 2018 (1), pp. 42-44

[6] Ma Kaohong: Measures to increase production and reduce consumption of raw material vertical mill system [J]. Cement, 2014 (5), pp. 37-38

[7] Dou Haijian, Tang Qinghua, Zeng Rong, et al.: Research on Resistance Characteristics of Common Moving Blades in Classifier [J]. Science and Technology Consulting Herald, 2012 (27), pp. 20-22

[8] Dou Haijian, Zeng Rong, Tang Qinghua, et al.: Numerical Study on Three-Dimensional Dynamic Flow Field of Classifier [J]. Cement Technology, 2013 (4), pp. 31-34

[9] Dou Haijian, Tang Qinghua, Wang Weili, et al.: Theory and Experiment Research of N-U Classifier [J]. Bulletin of the Chinese Ceramic Society, 2018, 37 (11), pp. 328-332