A method for recovering rare earth rich liquid from volcanic rock ion type rare earth ore

Abstract

The invention relates to a method for recycling rare-earth rich liquor from volcanic rock ionic type rare earth ores. The method is characterized in that the side, close to a semi-weathered layer, of an all-weathered layer of an ore body is provided with a guide roadway with a section which is 1.6-1.8m high and 0.6-0.8m wide; the guide roadway extends to the semi-weathered layer in a length direction; the side, close to a slightly-weathered layer, of the semi-weathered layer of the ore body is provided with a guide hole with a diameter of 50-80mm; the guide hole extends to the slightly-weathered layer in the length direction; and a liquid injecting wellused for being filled with an ore leaching liquid through pouring is longitudinally formed in the ore body. The method can be used for improving the recovery rate of leached rare-earth rich liquor.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal mining, in particular to a method for recovering rare earth rich liquid from volcanic rock ion type rare earth ore. Background technique [0002] Most of the deposits of ion-type rare earth deposits are produced in hilly areas with an altitude of less than 550m and a height difference of 250-60m. They are characterized by gentle and low mountains and the development of water systems. They are mainly formed by long-term strong weathering of granite or volcanic rocks exposed on the ground. , belongs to the exogenous type of deposit, and the deposit is generally distributed in a planar shape, covering the unweathered granite or volcanic rock mass in a convex lens shape, and its structure can be divided into humus and residual slope deposits, fully weathered layers, and semi Regolith, slightly weathered layer and bedrock, among which the fully weathered layer has the largest thickness and th...

AI Technical Summary

Problems solved by technology

[0004] The current third-generation leaching process has two ways to flow the rare earth mother liquor into the liquid collection ditch. One is to excavate the section at the junction of the semi-weathered layer and the fully weathered layer or the fully weathered layer with a height of about 1.6-1.8m and a width of about 0.6 -0.8m diversion roadway; the second is to construct a DN50mm pressure relief and drainage hole at the junction of the fully weathered layer or the fully weathered layer and the semi-weathered layer. The liquid injection wells opened by these two methods are relatively shallow, about 50cm , the two methods have the following disadvantages: (1) The roadway is set at the junction of the semi-weathered layer and the fully weathered layer or the fully weathered layer, resulting in the loss of recoverable rare earth resources in the fully weathered layer due to excavation of the roadway, and the mining of rare earth resources in the semi-weathered layer Because the leaching solution has been released in the roadway and cannot enter the semi-weathered layer to leach rare earths, two aspects lead to low recovery rate of rare earth mining

(2) The roadway is set in the semi-weathered layer, and because the lithology of the semi-weathered layer is hard, it cannot be excavated.

(3) Minable rare earth resources below the drainage hole cannot be leached and recovered

(4) Part of the leaching ore-rich liquid permeates below the guide hole through the interlayer between the diversion holes, resulting in the loss of the rare earth rich liquid

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