Jiangxi University of Science and Technology

Longyan Rare-Earth Development Co., Ltd.

Chenliang Peng

Lei Qin

Guanshi Wang

Shili Hu

Ping Long

Fangfang Xie

Shuo Zhang

Wenli Liu

Ying Huang

Sihai Luo

Dingshun He

Guoqiang Deng

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

The present disclosure relates to a method for determining a source sink term of an ionic type rare earth ore leaching process. The method includes the following four steps: (1) determining an ion exchange selection coefficient of a rare earth ore sample; (2) determining the rare earth grade of the rare earth ore sample; (3) building a source sink term model of the ore leaching process; and (4) determining parameters in the source sink term model. The present disclosure can simulate the ionic type rare earth ore leaching process by combining a convection-dispersion equation, and determine the optimal concentration of the ore leaching agent. When an ammonium sulfate solution at an optimal concentration of 12.0 g/L is used to perform a column leaching test, the obtained rare earth leaching rate is up to 96.3 percent.

Method for determining source sink term in ionic type rare earth ore leaching process

An ore volume-based zonal injection method for ionic rare earth includes six steps of ore body data acquisition; ore volume calculation by units; calculation of leaching agent consumption &#x3b3; per unit ore volume; calculation of unit ore volume-based zoning range difference; merging of the units into injection zones; and injection.

Ore volume-based zonal injection method for ionic rare earth ore

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Jiangxi, China

Chenliang Peng