Ion-absorbing type rare earth in-situ mineral leaching mother liquor recovery process

Abstract

An ion-absorbing type rare earth in-situ mineral leaching mother liquor recovery process is characterized by including the steps: determining the construction position of flow guide holes of a rare earth mother liquor recovery flow guide hole engineering control surface and forming a scarp at the position; forming a series of parallel flow guide holes along the direction of a massif and positioning the liquor recovery engineering control surface consisting of all the flow guide holes at the position which is as same as or slightly lower than that of a space curve formed at the bottom of an ore body; forming a liquor collecting open trench for collecting rare earth mother liquor on the lower portion of each flow guide hole; forming a water avoiding trench for preventing non-mother liquor from being collected into the liquor collecting open trench on the upper portion of each flow guide hole; communicating the water avoiding trench with a water avoiding trench discharging pipeline; communicating the liquor collecting open trench with a liquor collecting open trench collecting pipeline; and guiding the collected rare earth in-situ mineral leaching mother liquor to a mother liquor transfer tank at the bottommost end of the liquor collecting open trench. By the aid of the process, construction earth-disposing quantity can be decreased, construction time is greatly shortened, construction safety is enhanced, production cost is effectively reduced, and ecological environments are protected.

Description

technical field [0001] The invention relates to an ion-adsorption type rare earth in-situ leaching mother liquor recovery process, which belongs to the technical field of in-situ leaching and mining. Background technique [0002] Ion-adsorbed rare earths often occur in granite weathering crust or volcanic tuff, no matter how thick the weathering crust is, the lower part must be granite bedrock; the cutting depth of the mountain is generally small; the phreatic level is generally high (the distance from the bottom of the ore body The permeability of the ore soil is generally not very good, and the permeability and water content of the ore soil will change in favor of the recovery of rare earth leachate during the production process. [0003] In the ion-adsorption type rare earth in-situ leaching mother liquor recovery technology according to the prior art, the artificial false bottom liquid collection process of excavating roadways or the liquid collection process of natural ...

AI Technical Summary

Problems solved by technology

Therefore, its disadvantages are longer construction period, higher cost, more waste soil discharge, more difficult management, easy to generate safety hazards such as slabs, and there are problems such as construction difficulties when the inclination angle of the bottom of the ore body is large;

[0005] For another example, it is necessary to dig an open ditch at the foot of the mountain to be mined to collect the rare earth leaching solution. The operation is very simple, but the application conditions are very harsh. More importantly, the leaching effect of this process is poor, and the concentration of the tailing liquid (that is, the concentration of the rare earth mother liquor begins to decrease. Rare earth mother liquor after reaching 0.03g / l) is delayed for a long time, it is easy to cause landslides, and it is easy to leave a large amount of rare earth leachate and rare earth leaching agent, which can easily lead to serious environmental pollution problems

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