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Negative pressure leachate raising method for in-situ lixiviation of tailing for re-dressing

A technology for leaching liquid and tailings dam, which is applied in the field of in-situ leaching tailings dam, re-selected tailings, negative pressure lifting leachate, and collection of tailings leaching liquid, achieving the effect of easy operation, simple equipment and easy operation

Inactive Publication Date: 2003-11-05
NANHUA UNIV
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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 reclaiming recyclable tailings by using negative pressure to lift the leaching solution to a processing plant after storing tailings in situ leaching tailings dams, so as to solve the shortcomings of existing tailings recovery methods place

Method used

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  • Negative pressure leachate raising method for in-situ lixiviation of tailing for re-dressing
  • Negative pressure leachate raising method for in-situ lixiviation of tailing for re-dressing
  • Negative pressure leachate raising method for in-situ lixiviation of tailing for re-dressing

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Embodiment Construction

[0012] In-situ leaching of tailings dam re-election tailings negative pressure lifting leachate method is to inject a chemical leaching agent suitable for leaching a certain useful component into the tailings heap of the tailings dam to soak the tailings ;After soaking the tailings for a period of time, use a negative pressure lifting device to use negative pressure to extract the leaching solution containing useful components from the tailings heap to the surface and inject it into the liquid storage tank; before extracting the leaching solution under negative pressure, use a plastic film Cover the tailings area 16 so that the tailings under the plastic film are in a sealed area. When using the negative pressure lifting device to extract the leachate, it should be ensured that the vacuum value in this area is greater than 80Kpa.

[0013] In order to ensure the airtightness, the plastic film 1 should be laid in two to three layers, and the periphery of the plastic film 1 should...

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Abstract

In the lixiviation of tailing, proper chemical mineral impregnant is injected into tailing for soaking; and after soaking for some period of time, the leachate containing useful components is pumped from the tailing pile to storage pond on ground with some negative pressure raising apparatus. Before negative pressure pumping, the tailing area is covered with plastic film for sealing, so that thetailing area is maintained in 80 KPa below pressure during pumping. Some tailing area with poor permeability may be exploded to increase permeability before pumping. The present invention has the advantages of in-situ leaching without need of excavation and low leachate recovering cost.

Description

technical field [0001] The invention relates to the technical field of leaching and mining in the discipline of mining engineering, in particular to a method for collecting a tailings leaching liquid, in particular to a method for in-situ leaching of a tailings dam and reselectable tailings with negative pressure to lift the leaching liquid. Background technique [0002] At present, the storage capacity of metal mine tailings in the country has exceeded 6 billion tons, and the number is increasing by more than 300 million tons per year. Tailings can be divided into two categories: reprocessable tailings and non-reprocessable tailings. The so-called reselectable tailings are tailings that contain a certain amount of useful metal components, including traces of rare and precious metals. Useful components, especially rare and precious metals, have a high value, so tailings are an important object for repeated mining of mineral resources. In addition, som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/02
CPCY02P10/20
Inventor 王昌汉伍衡山张新华谢水波杨建明樊希葆朱红兵
Owner NANHUA UNIV
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