A method for ecological restoration of mining abandoned land

A technology of ecological restoration and abandoned land, applied in the restoration of polluted soil, etc., can solve the problems of high cost, unsustainable, secondary pollution, etc., and achieve the effect of low cost, improved nutrition and good fertilizer efficiency

Active Publication Date: 2022-06-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above analysis, the present invention aims to provide an ecological restoration method to solve the problems of high cost, unsustainability and possible secondary pollution in the existing mining wasteland restoration method

Method used

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  • A method for ecological restoration of mining abandoned land
  • A method for ecological restoration of mining abandoned land

Examples

Experimental program
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Effect test

Embodiment 1

[0068] The present embodiment of the graphite ore beneficiation tailings for ecological restoration, the process is as follows:

[0069] Step 1: Straw, wood chips, peels, bagasse, coconut shells, bamboo, deciduous leaves and livestock manure are crushed with a particle size of 0.073mm; the crushed waste biomass is hydrothermally carbonized, and the mass ratio of the crushed waste biomass to water is 1:1; the hydrothermal carbonization temperature is 160 °C, and the hydrothermal carbonization time is 60min; Solid-liquid separation of hydrothermal carbonization products to obtain solid hydrothermal carbon and hydrothermal carbon liquid;

[0070] Step 2: Add solid hydrothermal carbon to potassium dihydrogen phosphate solution with a mass concentration of 800mg / L for eutrophication, and after eutrophication, solid-liquid separation and drying treatment are carried out, and the drying temperature is 69 °C to obtain eutrophication hydrothermal carbon;

[0071]Step 3, the eutrophication ...

Embodiment 2

[0075] The present embodiment of the bauxite beneficiation tailings for ecological restoration, the process is as follows:

[0076] Step 1: Straw, wood chips, peels, bagasse, coconut shells, bamboo, fallen leaves and livestock manure are crushed with a particle size of 0.054mm; the crushed waste biomass is hydrothermally carbonized, and the mass ratio of the crushed waste biomass to water is 1:5; the hydrothermal carbonization temperature is 320 °C, and the hydrothermal carbonization time is 290min; Solid-liquid separation of hydrothermal carbonization products to obtain solid hydrothermal carbon and hydrothermal carbon liquid;

[0077] Step 2: Add solid hydrothermal carbon to potassium dihydrogen phosphate solution with a mass concentration of 1600mg / L for eutrophication, and after eutrophication, solid-liquid separation and drying treatment are carried out, and the drying temperature is 60 °C to obtain eutrophication hydrothermal carbon;

[0078]Step 3, the eutrophication hydrot...

Embodiment 3

[0082] The present embodiment of the magnesite ore beneficiation tailings for ecological restoration, the process is as follows:

[0083] Step 1: Straw, wood chips, peels, bagasse, coconut shells, bamboo, deciduous leaves and livestock manure are crushed with a particle size of 0.054mm; the crushed waste biomass is hydrothermally carbonized, and the mass ratio of the crushed waste biomass to water is 1:3; the hydrothermal carbonization temperature is 240 °C, and the hydrothermal carbonization time is 180min; Solid-liquid separation of hydrothermal carbonization products to obtain solid hydrothermal carbon and hydrothermal carbon liquid;

[0084] Step 2: Add solid hydrothermal carbon to potassium dihydrogen phosphate solution with a mass concentration of 1200mg / L for eutrophication, and after eutrophication, solid-liquid separation and drying treatment are carried out, and the drying temperature is 55 °C to obtain eutrophicated hydrothermal carbon;

[0085]Step 3, the eutrophicatio...

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Abstract

The invention relates to an ecological restoration method for mining abandoned land, which belongs to the technical field of mine ecological restoration and solves the problems of high cost, unsustainability and possible secondary pollution in the existing mining abandoned land restoration method. The ecological restoration method includes: step 1, crushing waste biomass and performing hydrothermal carbonization, and performing solid-liquid separation on hydrothermal carbonization products to obtain solid hydrothermal carbon and hydrothermal carbon liquid; step 2, solid hydrothermal carbon Adding it into the nutrient solution for eutrophication to obtain eutrophic hydrothermal carbon; step 3, mixing eutrophic hydrothermal carbon, water-absorbing minerals, biological macromolecules, water-absorbing agent monomers, cross-linking agents and inducers and Carrying out the polymerization reaction to obtain the improver; step 4, adding the improver to the soil of the mining wasteland, and planting plants for ecological restoration. The invention utilizes waste biomass to prepare a green and high-efficiency modifier, and provides an environmentally friendly and sustainable method for ecological restoration of abandoned mining land.

Description

Technical field [0001] The present invention relates to the field of mine ecological restoration technology, specifically to a method of ecological restoration of mining waste land. Background [0002] With the development of society and the acceleration of the process of industrialization, a huge number of minerals have been extracted. Mineral mining processes generate a large amount of mining waste, such as degraded mine sites and mineral processing tailings. Mining waste land is caused by many causes, including stripping of topsoil accumulation, rock fragments and low-grade ore accumulation, tailings accumulation formation, and land affected by mining that cannot be exploited. The key to ecological damage caused by mining is land degradation, that is, the deterioration of the physical and chemical properties of the soil in the abandoned land, the loss of nutrients and the increase of toxic and harmful substances in the soil. Site improvement is an important part of the restora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/00
CPCB09C1/08B09C1/00
Inventor 王重庆曹亦俊
Owner ZHENGZHOU UNIV
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