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Experimental study on the effect of ion exchange infiltration on the microstructure of rare earth ore body

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Document pages: 8 pages

Abstract: In order to study the evolution characteristics of pore structure in the leaching process of ionic rare earth ore, the influence mechanism of ion exchange seepage on the microstructure of ore body was analyzed, and the remodeling of rare earth saturated samples and ore leaching experiments were designed. The T2 diagram of pore structure of H2O and (NH4) 2SO4 solution during ore leaching was obtained by NMR, and the pore structure distribution image was inversed and reconstructed. The experimental results show that the influencing factors of ore leaching process on the microstructure of rare earth ore body include solution seepage and ion exchange. The main factor affecting the pore structure distribution is ion exchangermined by a dual effect. The sole action of solution seepage leads to an increase in pore size, which means that pore size structure is changing from small and medium to macro. Ion exchange gives rise to the movement and restructuring of particles, which results in a decrease in pore sizes. The pore structure changes from loose to compact; in the entire ore leaching process, the ion exchange action advances in a layered shape along the direction of seepage, and the chemical replacement and physical seepage alternately impact the microstructure of the orebodies.

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