Comprehensive treatment system for acid mine waste residues

By designing the inverted step round platform barrier structure and leachate drainage subsystem, the problem of leachate leakage in acid mine waste slag treatment is solved, rapid leachate drainage and effective sewage treatment are achieved, and the risk of pollution of acid mine waste slag on soil and water bodies is effectively reduced.

WO2025060623A1 Publication Date: 2025-03-27TECH CENT FOR SOIL AGRI & RURAL ECOLOGY & ENVIRONMENT MINIST OF ECOLOGY & ENVIRONMENT
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Patent Information

Application Number
PCT/CN2024/105227
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-21
Filing Date
2024-07-12
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

The prior art has problems with leachate leakage when treating acidic mine waste slag, and the stabilization or solidification of the active reaction filler will be weakened after long-term use, which has failed to effectively solve the pollution problem of acidic mine wastewater on soil and water bodies.

Method used

A comprehensive management system for acidic mine waste slag is designed, using an inverted step round platform barrier structure and a leachate drainage subsystem. Through the pre-pressing effect of multi-layer anti-seepage combination layer and pebbles, the leachate filtering and drainage are realized, and a liquid level gauge and pressure gauge are set up for automatic monitoring and cleaning.

Benefits of technology

It effectively solves the problem that multi-layer anti-seepage layer is difficult to fix, realizes rapid discharge of permeate, reduces the residence time and pollution degree of permeate in the acidic mine waste residue pile, and realizes the comprehensive treatment of mine waste residue and effective treatment of sewage.

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Abstract

The present invention relates to the technical field of mine waste residue treatment. Disclosed is a comprehensive treatment system for acid mine waste residues, comprising a dam body. An inverted stepped truncated cone blocking structure is provided in the dam body; the inner wall of the inverted stepped truncated cone blocking structure is paved with anti-seepage isolation combination layers, a cavity of the inverted stepped truncated cone blocking structure is filled with acid mine waste residues, an upper part of the inverted stepped truncated cone blocking structure is closed with a covering layer, and the bottom of the inverted stepped truncated cone blocking structure is equipped with a leachate drainage subsystem; the inverted stepped truncated cone blocking structure comprises a first truncated cone cavity, a transition annular platform, and a second truncated cone cavity in sequence from top to bottom; the transition annular platform is provided with a ring-like diversion slot and a primary diversion port; the bottom of the second truncated cone cavity is provided with a circular diversion slot and a secondary diversion port; cobblestones are paved above the anti-seepage isolation combination layer in the diversion slot; the diversion port is communicated to a leachate collection tank by means of branch pipelines and a gathering pipeline; and the leachate collection tank pumps out wastewater by means of a pumping and discharging mechanism. According to the present invention, multiple anti-seepage layers can be effectively fastened, graded seepage and rapid drainage can be implemented, and the environmental risk of mine waste residues can be effectively solved.
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