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Method for sealing the liquid injection hole of the ionic rare earth in-situ leaching field

An ionic rare earth, in-situ leaching technology, which can be used in earthwork drilling, sealing/sealing, improvement of process efficiency, etc.

Active Publication Date: 2021-11-19
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the liquid injection hole is not sealed tightly when the mine is closed, the residual mother liquor will be released, causing water and soil environmental pollution in the mining area

Method used

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  • Method for sealing the liquid injection hole of the ionic rare earth in-situ leaching field
  • Method for sealing the liquid injection hole of the ionic rare earth in-situ leaching field
  • Method for sealing the liquid injection hole of the ionic rare earth in-situ leaching field

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Experimental program
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Effect test

Embodiment 1

[0059] The method for sealing the liquid injection hole of the ionic rare earth in-situ leaching field provided in this embodiment, the steps are:

[0060] (1) Use clay to prepare mud with a mass concentration of 30%.

[0061] (2) Mud plugging: inject the prepared mud into the liquid injection hole to be closed, observe the drop of the mud level, stop injecting the mud when the rate of the mud level drops to 2mm / h, and pump out most of the mud in the hole, Keep 1 / 4 hole deep mud in the hole.

[0062] (3) Original soil backfill: backfill the rock and soil left over from the construction of the injection hole into the injection hole, tamp once every 10cm backfill, and backfill until 150cm away from the orifice;

[0063] (4) Lime backfill: backfill lime on the original soil backfill section with a thickness of 30cm;

[0064] (5) Clay backfill: backfill clay on the lime backfill section with a thickness of 50cm;

[0065] (6) Topsoil backfill: backfill the topsoil produced by th...

Embodiment 2

[0067] The liquid injection hole sealing method of the ionic rare earth in-situ leaching field provided in this embodiment is basically the same as that in Embodiment 1. The only difference is that the mud mass concentration is 40% in step (1); 1 / 3 deep mud is retained in the holes in step (2), and a lime filler section with a thickness of 20 cm is formed in step (4).

Embodiment 3

[0069] The liquid injection hole sealing method of the ionic rare earth in-situ leaching field provided in this embodiment is basically the same as that in Embodiment 1. The only difference is that in step (1), the mud material is bentonite, in step (2), 1 / 3 of the deep mud is retained in the holes, and in step (5), a clay section with a thickness of 50 cm is formed.

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Abstract

The invention relates to the technical field of environmental protection, and discloses a method for sealing a liquid injection hole in an ionic rare earth in-situ leaching field, including using mud to seal the pores in the liquid injection hole; and then injecting mud into the liquid injection hole Backfill filler. This method makes use of the characteristics of good fluidity of the mud, so that the mud can penetrate into various pores in the liquid injection hole, and uses the characteristics of the good viscosity of the mud to seal the pores in the liquid injection hole. Finally, filling the liquid injection hole can effectively prevent rainwater from seeping into the ground through the liquid injection hole, and control the release of residual mother liquor after the closure of the in-situ leaching field from the source and pollute the water and soil environment.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for sealing a liquid injection hole of an ion-type rare earth in-situ leaching field. Background technique [0002] The restrictive factor for the closure of the ionic rare earth in-situ leaching field is mainly that the residual mother liquor in the in-situ leaching field releases pollutants such as high salt, low acid, ammonia nitrogen, sulfate, and heavy metals, and enters the groundwater, thereby polluting the surrounding area of ​​the in-situ leaching field Soil and water environment. There are a large number of pores and fissures in the soil around the injection hole, and rainwater can easily infiltrate into the groundwater system through the pores and fissures in the soil around the injection hole. [0003] In the prior art, there are few studies on the sealing of the liquid injection hole. The original soil is used to backfill the hole. After th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B3/04E21B33/13
CPCC22B3/04C22B59/00E21B33/13Y02P10/20
Inventor 祝怡斌李青霍汉鑫周连碧杨晓松赵志龙林星杰鞠丽萍陈斌陈玉福陈谦苗雨孟磊
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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