Leaching solution interception process of weathering crust leaching type rare earth ore in southern China

Abstract

The invention relates to the technical field of intercepting of leaching solution of weathering crust elution-deposited rare earth ores in south China, and provides a weathering crust elution-deposited rare earth ore leaching solution intercepting technology according to landforms and geological characteristics of rare earth mines in view of the shortages in application of an in-situ ore leachingprocess in the weathering crust elution-deposited rare earth mines under complex geological conditions in order to improve the leaching solution recovery rate, reduce leaching solution seepage and enhance applicability of the in-situ ore leaching process. The weathering crust elution-deposited rare earth ore leaching solution intercepting technology mainly comprises four work procedures of solution-collecting roadways, flow guiding holes, cutting of pull grooves and anti-seepage treatment; the solution-collecting roadways are arranged at a bottom plate on the lower portion of a weathering crust elution-deposited rare earth ore body and parallel to the mountain body trend; the two rows of flow guiding holes are obliquely upwards drilled in the two side walls of the solution-collecting roadways, and the flow guiding holes are formed in a staggered mode; the pull grooves are formed in the two sides of the flow guiding holes in a cutting mode, and the pull grooves and the flow guiding holes form the manual intercepting bottom plate which can intercepts the more than 90% of leaching solution flowing through a region; and arcs on the lower parts of the pull grooves and the lower half parts of the flow guiding holes are grouted for seepage preventing, and anti-seepage treatment is conducted on the bottom surfaces of the solution-collecting roadways.

Description

technical field [0001] The invention relates to a leaching liquid closure process of a weathering crust leaching type rare earth ore in southern China, and relates to a weathering crust leaching type rare earth in-situ leaching process technology in the field of leaching and leaching. Background technique [0002] Weathering crust leaching type rare earth ore is a kind of rare earth ore that occurs in the weathering crust of granite and is adsorbed on the clay mineral carrier in the "ion" state. It is the rare earth mineral that is scarce in the world and has the largest reserve in my country. It is mainly distributed in southern China. . Because of its important industrial application value, it is regarded as the advantage and strategic resource of our country. [0003] The rare earth minerals in the ion-adsorbed state in the weathering crust elution type rare earth ore can be exchanged by more active ions in the electrolyte solution, and enter the solution to form a mother...

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Problems solved by technology

[0007] The present invention aims at the deficiencies of the in-situ leaching process in the application of weathering crust leaching type rare earth mines under complex geological conditions, and according to the topography and geological characteristics of rare earth mines, a kind of weathering crust leaching type rare earth mine leachate interception process is proposed. Improve the recovery rate of leachate, reduce the leakage of leachate, and enhance the applicability of in-situ leaching process

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