Isolation blanket for ecological restoration of metal waste storage yard

An ecological restoration and metal technology, applied in the direction of solid waste removal, application, and restoration of polluted soil, etc., can solve the problems of environmental pollution and ecological deterioration of metal ore solid waste yards, and achieve the reduction of the release of toxic heavy metals, The effect of solving pollution

Active Publication Date: 2016-08-31
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problems of environmental pollution and ecological deterioration caused by metal ore solid waste storage yards

Method used

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  • Isolation blanket for ecological restoration of metal waste storage yard
  • Isolation blanket for ecological restoration of metal waste storage yard
  • Isolation blanket for ecological restoration of metal waste storage yard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, an isolation blanket for the ecological restoration of waste metal yards provided by the embodiment of the present invention includes a low-permeability layer, a water-conducting layer, and a growth matrix layer arranged in sequence from bottom to top, and the growth matrix layer includes two upper and lower layers. The needle-punched staple fiber non-woven fabric 101, the needle-punched staple-fiber non-woven fabric 102 and the lightweight matrix 2 arranged between the needle-punched staple-fiber non-woven fabric 101 and the needle-punched staple-fiber non-woven fabric 102 are stacked. The substrate 2 is fermented from one or more of crop stalks, crop husks and wood processing waste, and the lightweight substrate 2 is evenly spread on the lower needle-punched staple fiber non-woven fabric 102. In this embodiment Among them, the crop husk is peanut or rice, etc., and the wood processing waste is sawdust or wood shavings, etc., and the mass den...

Embodiment 2

[0045] Embodiment 2 of the present invention is similar to Embodiment 1, and the same parts will not be repeated. The difference between the two is that the specification of the PP woven fabric is 200g / m 2 , Needle-punched staple fiber non-woven fabric 101, needle-punched staple-fiber non-woven fabric 102 and needle-punched staple-fiber non-woven fabric 103 are all 150g / m 2 ; The mass density of powdery sodium bentonite 4 in the low permeability layer is 4000g / m 2 , the particle size of powdery sodium-based bentonite 4 is 200 mesh; the thickness of the three-dimensional geonet 3 in the aquifer is 6mm: the mass density of light matrix 2 is 8000g / m 2 ; The light substrate 2 is the fermented crop straw. According to the above specifications, the isolation blanket B was prepared by the method of Example 1.

Embodiment 3

[0047] Embodiment 3 of the present invention is similar to Embodiment 1 and Embodiment 2, and the same parts will not be repeated. The difference is that the specification of PP woven fabric 5 is 200g / m 2 , Needle-punched staple fiber non-woven fabric 101, needle-punched staple-fiber non-woven fabric 102 and needle-punched staple-fiber non-woven fabric 103 are all 200g / m 2 ; The mass density of powdery sodium bentonite 4 in the low permeability layer is 3000g / m 2 , the particle size of powdery sodium bentonite 4 is 200 mesh; the thickness of three-dimensional geonet 3 in the aquifer is 6mm; the mass density of light matrix 2 is 6000g / m 2 ; The light substrate 2 is the fermented crop straw. According to the above specifications, the isolation blanket C was prepared by the method of Example 1.

[0048] Analyze the permeability coefficient of the insulation blanket in above-mentioned three embodiments

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Abstract

The invention relates to the technical field of ecological remediation and in particular to an isolation blanket for ecological remediation for a metal waste storage yard. The isolation blanket comprises a low permeability layer, a water guide layer and a growth matrix layer which are sequentially arranged from bottom to top, wherein the growth matrix layer is a composite light matrix pad and is composed of two layers of needled short fiber non-woven fabrics which are vertically stacked and a light matrix layer arranged between the two layers of needled short fiber non-woven fabrics; the water guide layer includes a three-dimensional geonet and is used for dredging infiltration water; and the low permeability layer includes a bentonite waterproof pad and is used for carrying out isolation and permeability prevention within a storage yard. The isolation blanket has a multilayer structure; in the ecological restoration process of the metal mine waste storage yard, by laying the composite isolation blanket and combined with implementation of vegetation engineering at the same time, the infiltration capacities of rainwater and other surface runoffs can be effectively reduced, and thus generation of acidic wastewater and release of toxic heavy metal are minimized and the environmental pollution is lowered to a minimum value.

Description

technical field [0001] The invention relates to the technical field of ecological restoration, in particular to an isolation blanket used for ecological restoration of waste metal storage yards. Background technique [0002] In metal mines, sulfide occurs in a large proportion of minerals, especially copper, lead, zinc and other metal deposits, which is equivalent to about 75% of the total amount of various minerals. In my country, there are many lean metal mines, few rich mines, many polymetallic mines, few single minerals, extremely low metal grades, and high mineral stripping ratios, resulting in a large amount of solid waste. The scope of solid waste pollution is mainly centered on large storage yards, and the downstream water and soil are polluted by surface runoff and leachate diffusion to the downstream and surrounding areas. The content and form distribution characteristics in the soil are affected by the release rate in the waste storage yard. , and the content of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09B3/00B32B5/02B32B5/26B32B5/06B32B27/02B32B27/14A01G1/00
CPCA01G22/00B09B3/00B09C1/00B32B5/022B32B5/06B32B5/26B32B27/14B32B2262/0253B32B2262/10B32B2264/10B32B2307/7265B32B2410/00
Inventor 王琼
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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