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Acid-method in-situ leaching mine stratum plug-removing method

An in-situ leaching and mining technology, applied in chemical instruments and methods, earthwork drilling, cleaning equipment, etc., can solve problems such as chemical blockage of boreholes

Inactive Publication Date: 2020-07-07
XINJIANG TIANSHAN URANIUM IND CO LTD CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for removing plugging in the formation of mines by acid in-situ leaching in order to solve the problem of chemical plugging in existing boreholes

Method used

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  • Acid-method in-situ leaching mine stratum plug-removing method

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Embodiment Construction

[0027] The present invention will be further described in detail below by taking the 512 ore deposit I and II cycle ore body mining area as an example, in conjunction with the accompanying drawings and specific embodiments.

[0028] This embodiment provides a method for unblocking the formation of mines by acid in-situ leaching, to remove the chemical blockage near the filter, near the wellbore and deep in the formation, to restore the leaching channel near the ore layer and the filter, to restore the permeability of the formation, and to achieve Economic exploitation of uranium resources. The method comprises the steps in turn:

[0029] S1. Build plugging remover configuration device

[0030] S1.1 Prepare the components required for the plugging agent configuration device, the composition of the plugging agent configuration device is as follows figure 1 As shown, its main components include: 1 hydrochloric acid storage tank 1 with a volume of 70m 3 ; 63×10mmPE liquid injec...

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Abstract

The invention belongs to the technical field of in-situ leaching uranium mining. Aiming at the serious chemical plugging formed by an ore bed in an acid-method leaching process, the invention providesan acid-method in-situ leaching mine stratum plug-removing method. According to the method, chemical plugging is dissolved through sequentially injecting a first-stage plug-removing agent (containing30 to 40 percent of industrial hydrochloric acid solution, 1 to 2 percent of corrosion inhibitor, 3 to 10 percent of industrial HF solution and 1 to 2 percent of iron stabilizing agent), a second-stage plug-removing agent (containing 15 to 20 percent of industrial multi-hydrogen acid solution, 1 to 2 percent of corrosion inhibitor and 1 to 2 percent of iron stabilizing agent), and an anti-swelling displacement fluid prepared from a surface active agent and clear water into a wellhead. The method has the beneficial effects that the chemical plugging near a filter and at a near-well-bore area and a stratum deep part can be removed, the ore bed and a leaching channel near the filter can be corrected, the permeability of a stratum is recovered, the acid-method in-situ leaching hole-drilling production capacity is improved, and the economic exploitation of a uranium resource is realized. The preparation of the all plug-removing agents is accomplished in a transfer groove, the plug-removingagents self-flow to a plug-removing agent preparation tank by utilizing an altitude difference, and the preparation process can be accomplished by only two persons.

Description

technical field [0001] The invention belongs to the technical field of uranium mining by in-situ leaching, and in particular relates to an acid in-situ leaching method for removing blockages in mine formations. Background technique [0002] In in situ leaching uranium mining, process drilling is the only channel for mining underground ore bodies, and its main function is to disperse the leachant or collect the leachate. The production efficiency of mining mines by in-situ leaching is largely related to the state of drilling in the in-situ leaching process. In the process of in-situ leaching production, due to the complex underground leaching environment, no matter what kind of leaching process is used, there will be different degrees of physical or chemical blockage around the borehole or filter. During the transportation and transportation of the leachant, part of the sediment and other impurities will enter the borehole together with the leachant and settle at the bottom ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06C09K8/528
CPCC09K8/528E21B37/06
Inventor 何小同肖碧泉龙红福谢希良陈立
Owner XINJIANG TIANSHAN URANIUM IND CO LTD CNNC
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