4[8]Chi R, Zhu G, Zhou Z, et al. A novel process for recovering rare earth from weathered black earth [J]. Metallurgical and Materials Transactions B-Process Metallurgy And Materials Processing Science., 2000, 31 (1): 191.
5[9]] Zhu G C, Chi R, Xu Y H. Separation and recovery of RE and Mn from MN rare earth mud in China [J]. International Journal of Mineral Processing, 2000, 59 (2): 163.
6[13]Chi Ruan, Xu Shengming, Zhu Guocai, et al. Benefication of Rare Earth in China [A]. Light metals 2001 [C]. The Minerals, Metals & Materials Society, New Orleans, Louisiana, USA, February 11~15, 2001. 1156.
7[14]Zhu Guocai, Qiu Xin, Chi Ruan, et al. Recovering RE with NH4Cl roasting from Bastnasite ore [A], MINPREX 2000 [C]. Melbourne, Australia: 2000. 237.
8[20]Shi Wenzhong, Zhu Guocai, Hu Jie, et al. Recovery of RE from Baotou rare earth concentrate with chlorination roasting[J]. Transactions of Nonferrous Metals Society of China, 2002. 13: (5).
9[22]Chi R, Zhu G C, Xu S M, et al. Kinetics of reduction leaching of manganese with sodium sulfite from the contained rare earth weathered mud [J]. Metallurgical and materials transactions B-process metallurgy and materials processing science, 2002, 32B (1):195.
10[29]Zhu Guocai, Chi Ruan, Xu Shengming, et al. The mechanism of chlorinating light rare earth (La,Ce) by ammonium chloride [J]. Mineral Engineering, 2002, 56(3).