Rare earth mining method for obtaining high-concentration leachate based on in-situ ore leaching process

Abstract

The invention relates to a rare earth mining method for obtaining high-concentration leachate based on an in-situ ore leaching process. The rare earth mining method comprises the following steps of taking ammonium sulfate reagent as an ore leaching agent; vibrating and compacting an in-situ ore bed by adopting a vibrating and compacting tool; injecting the ore leaching agent into the ore bed; collecting leachate, wherein the concentration of the ore leaching agent in the step 1) is 2%-4%; and in the step 2), the permeability of the in-situ ore layer after being vibrated and compacted is controlled within the range of 200 md-800 md; and 3) the strength of the ore leaching agent injected into the in-situ ore bed is 1 / 5-1 / 3 of the thickness of the ore bed. It is found through experiments thatthe concentration of the leachate is quite ideal, the power cost is low, and the purposes of the high recovery rate of ionic rare earth resources and the low production cost are achieved.

Description

Technical field: [0001] The invention belongs to the field of rare earth mining, and in particular relates to a rare earth mining method for obtaining high-concentration leachate based on an in-situ leaching process. Background technique: [0002] Since its discovery, the development of ion-type rare earth resource extraction technology has experienced many key breakthroughs from scratch, from easy to difficult, and from coarse to fine. With the support of the state and governments at all levels, Chinese scientific and technological workers have carried out a lot of long-term, arduous and fruitful work, and successively invented open-air pool leaching, heap leaching, and in-situ leaching mining technologies, during which they experienced a revolution in production technology Sexual changes. Among them, the "in-situ leaching" technical achievement won the third prize of the National Invention Award in 1998, and was listed in the top ten world-leading scientific and technolog...

AI Technical Summary

Problems solved by technology

[0003] At present, in the production process of ionic rare earth mines, the concentration of leachate is generally low, which leads to serious consequences in the mining process, such as high infrastructure cost, high power cost and low resource recovery rate.

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