中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 2 No. 2 May 1992 |
MULTISTAGE STIRRING, LEACHING AND WASHING TOWER&ITS APPLICATION IN Re ORE EXTRACTION
Zhang Jing, Zhao Bing, Ling Ling, Lu Lizhu
（Institute of Chemical Metallurgy, Academia Sinica, Being 100080, China）
Abstract:The multistage stirring, leaching and washing tower (MSLWT) was designed to make it possible to finish leaching and washing of ore in one equipment. The residence time distributions (RTD) of MSLWT were studied. Peclet number, t, ó2 were calculated based on the diffusion modeh the results indicate the diffusion model is suitable to MSLWT. The application of MSLWT to the leaching of rare earth ore increases the recovery to above 92% and reduces the washing factor to less than 0. 06.
Key words: RTD rare earth leaching and washing
