Method for calculating influence radius of ion type rare earth in-situ leaching single-bore injection

Abstract

The invention relates to a method for calculating an influence radius of ion type rare earth in-situ leaching single-bore injection and is applicable to designs of in-situ leaching injection bore mesh parameters. The method disclosed by the invention respectively comprises the following seven steps: (1) testing saturated volumetric water content of an ore body; (2) testing a soil-water characteristic curve of the ore body; (3) setting saturation degree of a single-bore injection influence boundary, and calculating a suction head value of the influence boundary; (4) calculating an average permeability coefficient in a single-bore injection influence range; (5) calculating a distance between an influence boundary on a plane where the injection bore bottom is positioned and the injection bore periphery; (6) calculating a constant of change speed of the volumetric water content along with a radial distance; and (7) calculating the influence radius of the single-bore injection. According to the method disclosed by the invention, the influence radius of the single-bore injection can be calculated by utilizing an established model on the basis of testing soil property parameters, and a basis is provided for the in-situ leaching injection bore mesh parameter design.

Description

technical field [0001] The invention relates to a calculation method for the influence radius of single-hole liquid injection for ionic rare earth in-situ leaching ore, and is suitable for parameter design of in-situ ore leaching and injection hole network. Background technique [0002] In-situ leaching is the third-generation process for extracting ionic rare earth resources. This process injects a leaching agent solution into the ore body through a liquid injection hole to cause an exchange reaction with rare earth ions, and then injects the supernatant into the liquid injection hole. The rare earth ions enter the supernatant to form a leachate, which flows out from the liquid collection project, and the rare earth ions in the leachate are precipitated with a precipitant to achieve the purpose of resource recovery. [0003] For the entire in-situ leaching process, the layout of the liquid injection hole network is one of the core. During the promotion of the in-situ leachi...

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Problems solved by technology

[0004] The rationality of the mesh layout will directly affect the recovery rate of rare earth resources, mainly in three aspects: (1) The distance between the liquid injection holes is too large, and the ore leaching agent cannot penetrate into the In the farther area, it is easy to cause a leaching blind area and reduce the recovery rate of rare earth resources; (2) If the spacing of the liquid injection holes is too small, it will increase the investment cost, and it is also easy to cause hole channeling. Once hole channeling occurs, further increase The scope of the leaching blind area reduces the resource recovery rate; (3) The distance between the liquid injection holes is too small, which may easily cause the liquid injection intensity to be too large, and landslides are prone to occur, and the resources in the landslide area are also difficult to recover

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