Jiangxi University of Science and Technology

Longyan Rare-Earth Development Co., Ltd.

Dingshun He

Chenliang Peng

Guanshi Wang

Lei Qin

Ping Long

Shili Hu

Sihai Luo

Guoqiang Deng

Wenli Liu

Ying Huang

The present disclosure provides a method for optimizing a liquid injection process of ionic rare earth ore, including the following steps of: 1) testing the hydraulic properties of an ore body; 2) determining the diffusion degree of the ore body; 3) determining the spatial distribution of the rare earth grade and the impurity grade of the ore body prior to leaching; 4) determining model parameters of competitive exchange of rare earth ions and impurity ions with ammonium ions; 5) obtaining distribution of rare earth ion concentration within the ore body after completion of leaching; 6) obtaining a profile plot of a rare earth leaching rate as a function of the concentration and dosage of an injected leaching agent; and 7) determining a minimum leaching agent dosage to achieve a target leaching rate according to the profile plot, and then determining the ammonium sulfate concentration according to the minimum leaching agent dosage.

Method for optimizing liquid injection process of ionic rare earth ore

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JIANGXI, China

Dingshun He