Recovery system and treatment method for seepage mother liquor in in-situ leaching field of ion-adsorption rare earth ore

An ion-adsorption, in-situ ore leaching technology, which is applied in earthwork drilling, mining equipment, underground chambers, etc., can solve problems such as discounting of operating effects, and achieve the goals of improving pollution, reducing hydraulic gradient, and efficiently controlling the diffusion of pollutants Effect

Active Publication Date: 2022-04-26
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the operation effect of extraction technology is greatly reduced in places with fast runoff, large groundwater hydraulic gradient, and poor groundwater connectivity.

Method used

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  • Recovery system and treatment method for seepage mother liquor in in-situ leaching field of ion-adsorption rare earth ore
  • Recovery system and treatment method for seepage mother liquor in in-situ leaching field of ion-adsorption rare earth ore
  • Recovery system and treatment method for seepage mother liquor in in-situ leaching field of ion-adsorption rare earth ore

Examples

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Effect test

Embodiment

[0064] In an ion-adsorption rare earth mine in Ganzhou, the thickness of the weathered crust of the deposit is about 15m. The bottom of the deposit has slightly weathered bedrock as a false floor, and the rare earth is recovered by in-situ leaching.

[0065] Its in-situ leaching leakage mother liquor recovery system includes the following steps:

[0066] (a) Seepage interception barriers are arranged at the 25m valley downstream of the mining area. The seepage interception barriers are perpendicular to the flow direction of groundwater, and both ends extend to the contact zone between the semi-weathered layer and the slightly weathered layer on the hillside; construct 3 rows of grouting holes with a row spacing of 1m and a hole spacing of 1m. 0.5m, hole diameter 30mm, hole depth to 1.5m below the micro-weathered layer, quickly form a hole with Luoyang shovel, the buried depth of the groundwater level at the construction site of the seepage barrier is 1.5m, the buried depth of t...

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Abstract

The present invention provides an ion-adsorption type rare earth ore in-situ leaching field leakage mother liquor recovery system and treatment method, which relate to the technical field of mine groundwater pollution prevention and control. The system includes a mother liquor interception area and a seepage interception barrier; ~50m valley; the mother liquid interception area is arranged 5-10m upstream of the seepage interception barrier, including the seepage recovery well, at least one seepage collection well and connecting holes; the seepage collection well collects and disperses seepage The connecting hole guides the collected seepage to the seepage recovery well, and the seepage recovery well pumps the intercepted seepage to the mother liquor treatment workshop to recover valuable resources. The invention can efficiently recover the mother liquor leaked from the in-situ leaching field, control the diffusion of pollutants in the groundwater at the same time, and can effectively improve the groundwater pollution around the in-situ leaching field.

Description

technical field [0001] The invention relates to the technical field of prevention and control of underground water pollution in mines, in particular to a recovery system and a treatment method for the leakage mother liquor of an ion-adsorption type rare earth ore in-situ leaching field. Background technique [0002] Ionic rare earth deposits are distributed in hilly landforms with little difference in height. Ion-adsorption rare earth deposits are weathered crusts formed by intense weathering of rare earth-containing granite and other volcanic rocks under the conditions of warm and humid climate and low mountains and hills. The ore bodies are generally Occurs in fully weathered and semi-weathered zones. [0003] After mining and closing of the ionic rare earth in-situ leaching field, the injected and residual mother liquor has a pH of 4 to 5, which is acidic and carries pollutants such as ammonia nitrogen, sulfate, and heavy metals, and enters the groundwater, thereby pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/02C22B3/04C22B59/00E21D11/38
CPCC22B3/02C22B3/04C22B59/00E21D11/38Y02P10/20
Inventor 陈斌徐星祝怡斌周勇李青鞠丽萍陈谦陈玉福刘子齐翟文龙
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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