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Modifier for ecological restoration of goldmine tailings and modifying method of goldmine tailings

A technology for gold mine tailings and ecological restoration, applied in the direction of site preparation methods, chemical instruments and methods, applications, etc., can solve the problems of not being universally promoted, difficult management, and expensive chemicals, so as to improve the improvement effect and improve Ecological environment, the effect of improving the survival rate

Active Publication Date: 2021-12-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main categories of improvement for tailings: one is physical improvement, including soil replacement, foreign soil, and deep plowing; physical improvement methods are relatively mature and have significant restoration effects, but there are problems with the supply of foreign soil sources, large engineering quantities, and management problems. Difficulties, high investment issues
The second is chemical improvement, including the application of organic fertilizers or soil conditioners; chemical improvement can adjust the pH value of tailings in a short period of time, improve the physical, chemical and biological properties of tailings, increase the effective nutrient content of tailings, and improve the quality of tailings. The purpose of increasing vegetation coverage and its biological yield, but the cost is high, a large amount of chemicals are required, and it may cause secondary pollution, making it difficult to completely achieve ecological restoration
The third is biological improvement, including plant, animal, and microbial improvement methods; bioremediation can indeed achieve ecological restoration more effectively, but this method has a slow effect and a long cycle, and requires the introduction of exotic plants with high tolerance for planting, which may cause ecological damage and also not widely promoted

Method used

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  • Modifier for ecological restoration of goldmine tailings and modifying method of goldmine tailings
  • Modifier for ecological restoration of goldmine tailings and modifying method of goldmine tailings
  • Modifier for ecological restoration of goldmine tailings and modifying method of goldmine tailings

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0055] A component A of an improver for ecological restoration of gold mine tailings, prepared by the following method:

[0056] (1) Retrieve the effluent sludge from the Beijing Gaobeidian Reclaimed Water Plant. The water content of the sludge is about 80%, and the sludge is naturally air-dried and ground to powder to obtain sewage with a particle size of 1 to 5 mm. mud powder;

[0057] (2) Anionic polyacrylamide with a weight-average molecular weight of 10 million to 12 million, biochar with a particle size of 1 mm to 2 mm, vermiculite with a particle size of 20 mesh to 40 mesh, and peat with a particle size of 5 mm to 10 mm and obtained in step (1) Sludge powder is mixed to obtain A component.

[0058] The content of each component in component A is shown in Table 1, and the unit of the addition amount of each component in Table 1 is kg.

[0059] Table 1

[0060] Element 1#A component 2#A component 3#A component 4#A component 5#A component polyacr...

Embodiment 1

[0071] A method for improving gold mine tailings (from Sanshan Island, Laizhou, Shandong, Xinli gold mine tailings reservoir), comprising the following steps:

[0072] (1) In Sanshan Island, Laizhou, Shandong Province, Xinli gold mine tailings reservoir, the length and width are each 10m, and the area is 100m 2 The field of the test site is used as the test site, and then the tailings in the test site are plowed to a depth of 20cm, and the tilled tailings are mixed with the A component of the modifier (the quality of the tilled tailings is about 10kg , component A of the modifier is mixed with the tailings after plowing according to the total weight in Table 1) to obtain the tailings after plowing, and then component B of the modifier is poured on the tailings after plowing, watering The amount is 500mL-600mL per square meter of plowed soil to obtain tailings after watering;

[0073] (3) Plant tall fescue on the tailings after the watering, and water the B component of the im...

Embodiment 6

[0078] A method for improving gold mine tailings (from Sanshan Island, Laizhou, Shandong, Xinli gold mine tailings reservoir), comprising the following steps:

[0079] (1) In Sanshan Island, Laizhou, Shandong Province, Xinli gold mine tailings reservoir, the length and width are each 10m, and the area is 100m 2 The field of the test site is used as the test site, and then the tailings in the test site are plowed to a depth of 20cm, and the tilled tailings are mixed with the A component of the modifier (the quality of the tilled tailings is about 10kg , the A component of the improver is the mixture prepared by the A component of the total weight 1301kg prepared in Comparative Example 1), to obtain the tailings after plowing;

[0080] (2) Plant tall fescue on the tailing sand after the plowing, and take care of the growth of the plants until 6 months.

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Abstract

The invention relates to a modifier for ecological restoration of goldmine tailings and a modifying method of the goldmine tailings. The modifier comprises a component A, wherein the component A comprises polyacrylamide, biochar, sludge powder, vermiculite and peat. According to the modifier for ecological restoration of the goldmine tailings, the pH value, nutrients and conductivity of the goldmine tailings can be improved, the goldmine tailings are made to adapt to plant growth, the ecological environment of goldmine tailings landfill is further improved, and the modifier is low in component price and cost.

Description

technical field [0001] The invention belongs to the technical field of gold mine tailings matrix improvement, and in particular relates to an improver for gold mine tailings ecological restoration, a method for improving gold mine tailings, and an improver group for gold mine tailings ecological restoration point. Background technique [0002] With the continuous increase in the utilization of mineral resources, we are faced with the problem of accumulation of a large number of tailings and tailings. Gold mine tailings are solid wastes produced during the process of extracting gold from gold mines. They have the characteristics of low cohesion of tailings, lack of nutrient content and water and fertilizer retention capacity, and easy soil erosion. Long-term stockpiling of tailings will be affected by natural factors (air, moisture, sunlight) and itself, causing hidden harm to the ecological environment, drinking water sanitation, soil structure, etc., not only bringing wast...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01B79/02B09C1/10B09C1/08C09K101/00C09K109/00
CPCC09K17/40A01B79/02B09C1/08B09C1/10B09C1/105C09K2101/00C09K2109/00
Inventor 李冰林海江昕昳
Owner UNIV OF SCI & TECH BEIJING
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