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A method for pollution prevention and vegetation restoration of metal sulfide ore solid waste storage yard

A technology for sulfide ore and storage yards, applied in botany equipment and methods, excavation, gardening, etc., can solve problems such as unsatisfactory effects and comprehensive utilization of tailings less than 10%, achieve a good ecological environment, and reduce toxic and heavy metals The effect of releasing and reducing environmental pollution

Active Publication Date: 2016-05-25
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-ferrous metal sulfide mines produce an average of 1.25 tons of waste rock per ton of ore mined. In recent years, non-ferrous metal mines need to discharge 130 to 140 million tons of waste rock per year; the average output of each ton of ore is about 0.92 tons Sand and tailings will increase by about 110 million tons per year, and the comprehensive utilization rate of tailings will be less than 10%.
However, this method is not very effective in repairing slopes.

Method used

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  • A method for pollution prevention and vegetation restoration of metal sulfide ore solid waste storage yard

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Dexing City, Jiangxi Province, Jiangxi Copper Co., Ltd. Dexing Copper Mine Shuilongshan waste rock yard A test area, the slope surface is relatively loose, and the waste rock contains sulfide minerals, and there is no soil layer; the pH value of the waste rock is 3.0 Left and right, the acidity is high, which seriously restricts the normal growth of plants.

[0053] Follow the steps in order:

[0054] 1) Prepare the acidic improvement layer: Mix the loam, lime and binder evenly, among which the loam and lime are mixed according to the volume ratio of 15:1, and the binder is calculated based on the unit area to be sprayed, and the specific dosage For adhesive 10g / m 2 .

[0055] 2) Preparation of substrate layer: uniformly mix the greening substrate, loam, water-retaining agent and adhesive, wherein the greening substrate and loam are mixed according to the volume ratio of 2:8, and the water-retaining agent and adhesive are to be sprayed The unit area of ​​sowing is ca...

Embodiment 2

[0071] Dexing City, Jiangxi Province, Jiangxi Copper Co., Ltd. Dexing Copper Mine Shuilongshan waste rock yard A test area, the slope surface is relatively loose, and the waste rock contains sulfide minerals, and there is no soil layer; the pH value of the waste rock is 3.0 Left and right, the acidity is high, which seriously restricts the normal growth of plants. Follow the steps below in sequence (combining figure 1 Schematic diagram of the slope structure shown):

[0072] 1) Prepare the acidic improvement layer: Mix the loam, lime and binder evenly, among which the loam and lime are mixed according to the volume ratio of 20:1, and the binder is calculated according to the unit area to be sprayed, and the specific dosage 15g / m for adhesive 2 .

[0073] 2) Preparation of substrate layer: uniformly mix the greening substrate, loam, water-retaining agent and adhesive, wherein the greening substrate and loam are mixed according to the volume ratio of 3:7, and the water-retain...

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Abstract

The invention relates to a pollution prevention and vegetation recovery method for a metal sulphide ore solid waste storage yard. The method comprises the following steps of conducting stabilizing treatment on side slopes of the storage yard, laying a two-way geogrid, building intercepting ditches in the slope faces of the storage yard, spraying an acidic improvement layer, laying a flexible isolating layer, laying ecological sticks, laying a two-way geogrid, spraying a base material layer, spraying a seed layer and laying a protective layer, so that plants have sufficient water and nutrition during growth. Due to the fact that the acidic improvement layer is built for neutralizing H+, the plant growth condition can be built; the flexible isolating layer and vegetation recovery are combined for preventing H2O and O2 from making contact with tailings, sulfide minerals in waste rock can be effectively prevented from being oxidized, and therefore waste water acidification and heavy metal ion leaching are prevented. According to the pollution prevention and vegetation recovery method, the problem of environmental pollution of pollutants in the metal sulphide ore solid waste storage yard can be effectively reduced, the area of green plants can be increased, and the good ecological environment is built; the pollution prevention and vegetation recovery method is simple in construction technology, easy to implement, high in efficiency and suitable for large-area application.

Description

technical field [0001] The invention relates to the technical field of ecological restoration of abandoned mine land, and relates to the ecological restoration of special site conditions such as metal mine dumps (waste rock yards) and heap leaching sites, and specifically relates to pollution prevention and vegetation restoration of metal sulfide ore solid waste yards Methods. Background technique [0002] Metal mines have a large proportion of sulfides in minerals, especially copper, lead, zinc and other metal deposits, which are 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. Non-ferrous metal sulfide mines produce an average of 1.25 tons of waste rock per ton of ore mined. In recent years, non-ferrous metal mines need to discharge 130 to 140...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20A01G1/00
Inventor 王琼吴亮亮张华张望周连碧
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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