CN104987260A - Ecological restoration matrix for lead-zinc tailing pond and preparation method and application thereof - Google Patents
Ecological restoration matrix for lead-zinc tailing pond and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses an ecological restoration matrix of a lead-zinc tailing pond, which comprises the following components in parts by mass: 45-55 parts of tailing of a tailing pond, 20-30 parts of organic matters and 25-35 parts of tailing regulator; wherein the organic matter comprises 20-33 parts of urban river sediment, 25-40 parts of mineralized refuse and 33-50 parts of agricultural wastes; the tailing regulator comprises 28.6-40 parts of water-retaining agent, 16.7-28.6 parts of adhesive and 40-50 parts of chelating agent; the tailings of the tailings pond are dry beach sediments formed by air drying the surface of the lead-zinc tailings pond, and the particle size is 0.07-0.15 mm; the bottom sludge of the urban river is a product of high-temperature compost fermentation of an urban sewage treatment plant, and the water content is 30-40%; the mineralized refuse is a product of screening and fermentation of an urban refuse treatment plant; the agricultural waste is crushed to the particle size of below 1cm, and is added with a decomposing agent and water for decomposition. The invention realizes the rapid ecological restoration of the lead-zinc tailing pond by the ecological restoration technology, thereby achieving the purposes of controlling the environmental pollution of the tailing pond to the surrounding soil and improving the living and living environment of surrounding residents.
Description
Technical field
The present invention relates to that metal mine discards the ecological recovery on ground, land reclamation and contaminated site repair field, particularly, the present invention relates to the ecological recovery matrix in a kind of Pb-Zn tailings storehouse and its preparation method and application.
Background technology
Pb-Zn tailings refers to that lead-zinc ore is after the step such as levigate, useful component is chosen, and the waste of going out of discharge is the part that in ore dressing, in separation operation, useful target components content is minimum.Pb-Zn tailings, containing multiple objectionable constituent, as mixed suspended substance, prussiate, potential of hydrogen, heavy metal ion, flotation reagent etc., belongs to Hazardous wastes.The Lead for China zinc ore place of production, statistic data shows: plumbous 887 places, zinc 905 place, has 27 province, district and city find and reconnoitred reserves.Pb-Zn tailings have not easily with water leaching, can not be degraded by microorganisms, have bioconcentration, latent period long, administer and take effect slowly, costly with by features such as many factors restrictions.
The feature lean ore of China's Pb-Zn deposits is many, rich ore is few, structure construction and mineral composition complexity, and some milling ores are containing 30 multi mineral, many ore disseminated grain sizes are trickle, and structure construction is complicated, belongs to refractory ore type, bring difficulty to ore dressing, create a large amount of mine tailings.The comprehensive utilization ratio of China's mine tailing is only 7%, far apart with the advanced level of external comprehensive utilization ratio 60%.A large amount of mine tailings can only pile exist Tailings Dam or some naturally in, unavoidably bring a series of problem.
The Pb-Zn tailings that accumulation produces, bulky, floor space is large, destroy view, and containing a large amount of heavy metals such as lead, zinc, cadmium in Pb-Zn tailings, pollute surrounding soil, Planting Crops in contaminated soil, heavy metal easily enters human body by food chain, is detrimental to health.And the mine tailing left in Tailings Dam, because particle is tiny, easily cause the geologic hazard such as rubble flow, dam break.
After the proposition of " Pollution free mine ", country puts into effect a series of policy, measure encourages enterprise to improve the comprehensive utilization ratio of mine tailing, and promotion scientific research institutions and enterprise strengthen the research dynamics of comprehensive utilization of tailing, and achieve some achievements in research.As recycled the mine tailing that history is stored up, in Pb-Zn tailings backfilling goaf, make building brick.But low owing to reclaiming mine tailing benefit, achievement in research practical application is unreasonable, prior art such as to fall behind at the problem, and cause the mine utilization ratio that has very low, some mines major product rate of recovery is low.
Along with ecotope goes from bad to worse, Pb-Zn tailings Ecological recovery technology is particularly important, there is huge development space, mine tailing Ecological recovery technology can not only the various resource of tailings of second stage employ, turn waste into wealth, reach minimizing, innoxious and resource utilization, can improve the ecological environment, be the inevitable choice of environment, economy, social sustainable development simultaneously.
Summary of the invention
The object of the invention is to, a kind of ecological recovery matrix of Pb-Zn tailings storehouse is provided, this matrix can be applied to humid region, rainfall is concentrated and the ecological recovery that large nonferrous metal mine Tailings Dam heavy metal is repaired, can process that different metal mine is adopted, selected, the contaminated soil in smelting type and different heavy metal contamination place, reach the effect recovering original vegetation.
For achieving the above object, the present invention is achieved by the following technical solutions:
The ecological recovery matrix in Pb-Zn tailings storehouse, in mass parts, described matrix comprises: Tailings Dam tailings 45-55 part, organism 20-30 part, tailings conditioning agent 25-35 part;
Wherein, organism comprises city river bed mud 20-33 part, mineralized waste 25-40 part, agricultural waste 33-50 part; Tailings conditioning agent comprises water-holding agent 28.6-40 part, tamanori 16.7-28.6 part, sequestrant 40-50 part;
Described Tailings Dam tailings is the dry beach settling of the Pb-Zn tailings storehouse air-dry rear formation in surface, and particle diameter is 0.07-0.15mm;
Described city river bed mud is the product of municipal sewage plant's During High-Temperature Composting fermentation, water ratio 30-40%;
Described mineralized waste is the product of municipal waste plants screening and fermentation;
It is below 1cm that described agricultural waste is crushed to particle diameter, and interpolation decomposing agent and water become thoroughly decomposed.
Preferably, described agricultural waste is maize straw.Those skilled in the art can also select the stem stalk of other farm crop as required, such as, and wheat straw etc.
Preferably, described water-holding agent is polyacrylate.Those skilled in the art can also select other water-holding agent as required.
Preferably, described tamanori is polyacrylamide polymers.Those skilled in the art can also select other tamanori as required.
Preferably, described sequestrant is ethylenediamine tetraacetic acid (EDTA), and chemical formula is H4Y, containing carboxyl and amino sequestrant, almost generates stable water soluble chelate compound with all transition heavy metal ion.Those skilled in the art can also select other sequestrant as required.
Preferably, during plantation common cattail, this substrate composition is Tailings Dam tailings: city river bed mud: mineralized waste: agricultural waste=50:5:10:10, water-holding agent: tamanori: sequestrant=10:10:15;
Preferably, during plantation Leucaena leucocephala (L.), this substrate composition is Tailings Dam tailings: city river bed mud: mineralized waste: agricultural waste=50:5:10:10, water-holding agent: tamanori: sequestrant=10:5:15.
Present invention also offers a kind of preparation method of ecological recovery matrix of above-mentioned Pb-Zn tailings storehouse, said method comprising the steps of: in proportion Tailings Dam tailings, organism and tailings conditioning agent are mixed at normal temperatures.
The side slope that the ecological recovery matrix that invention still further provides above-mentioned Pb-Zn tailings storehouse is formed in Mine Tailings storehouse, moist area of southern China and platform and dry sand of tailings reservoir platform carry out the application in ecological recovery.
In ecological recovery matrix of the present invention practical application, described vegetation is common cattail (T.latifolia L.) and/or Leucaena leucocephala (L.) (Leucaena glauca (L.) Benth.).
The present invention is used for Tailings Dam side slope and plain stage of slope and dry beach platform and carries out ecological recovery and soil improvement; the tailings utilized in mine tailing as much as possible; the certain nutritive ingredient of auxiliary interpolation improves tailings physico-chemical property simultaneously; this ecological recovery matrix and formula can be produced on the spot; reduce tailings volume of cargo in storage, reduce ecological recovery cost, protect local land resources; can be applied to moist area of southern China, rainfall is concentrated and the afforesting matrix of the Tailings Dam ecological recovery of larger metal mine.
The present invention realizes the quick ecological restoration in Pb-Zn tailings storehouse by Ecological recovery technology, thus reaches improvement Tailings Dam to the environmental pollution of Soil Surrounding, improves inhabitation and the living environment of nearby residents.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
Embodiment 1:
The present invention is directed to Pb-Zn tailings storehouse to process, the additive chosen is Tailings Dam tailings, city river bed mud, mineralized waste, maize straw, water-holding agent, tamanori and sequestrant.Common cattail and Leucaena leucocephala (L.) 2 kind of plant are chosen in invention.Each additive feature is as follows:
Tailings Dam tailings of the present invention is the dry beach settling of the Pb-Zn tailings storehouse air-dry rear formation in surface, and particle diameter is 0.07-0.15mm; Described city river bed mud is the product of municipal sewage plant's During High-Temperature Composting fermentation, water ratio 30-40%; Described mineralized waste is the product of municipal waste plants screening and fermentation; It is below 1cm that described agricultural waste (maize straw) is crushed to particle diameter, and interpolation decomposing agent and water become thoroughly decomposed.Water-holding agent and tamanori are high molecular polymers, nontoxic, have very strong water conservation and sustained release performance, effectively improve soil, promote that root system nutrient absorbs fast; Sequestrant is ethylenediamine tetraacetic acid (EDTA), almost generates stable water soluble chelate compound with all transition heavy metal ion.
The preparation method of ecological recovery substrate formula of the present invention carries out according to following steps:
Selection Tailings Dam tailings is the dry beach settling of the Pb-Zn tailings storehouse air-dry rear formation in surface, and particle diameter is 0.07-0.15mm, for subsequent use;
Get constituent mass ratio to be respectively: Tailings Dam tailings 45-55 part, organism 20-30 part, tailings conditioning agent 25-35 part; Wherein, river bottom mud accounts for 20-33 part in organism quality, and mineralized waste accounts for 25-40 part in organism quality, and agricultural waste accounts for 33-50 part in organism quality; Water-holding agent accounts for 28.6-40 part in tailings conditioning agent quality, and tamanori accounts for 16.7-28.6 part in tailings conditioning agent quality, and sequestrant accounts for 40-50 part in tailings conditioning agent quality.
By above-mentioned raw materials at normal temperatures Homogeneous phase mixing form.
Concrete test adopts Three factors-levels orthogonal test to analyze.As following table 1:
Table 1 orthogonal test factor and water-glass
Test-results is as follows:
(1) common cattail group: A, C are principal element, optimization formula is A2B1C1, namely proportioning is tailings 50 parts, bed mud: mineralized waste: maize straw mass ratio=5:5:10, water-holding agent: tamanori: sequestrant=10:10:15, the most favourable to common cattail growth, make common cattail bring up to 75% to the accumulation rate of plumbous zinc from 18%;
(2) Leucaena leucocephala (L.) group: A, C are principal element, optimization formula is A1B2C3, namely proportioning is tailings 45 parts, bed mud: mineralized waste: maize straw mass ratio=5:10:10, water-holding agent: tamanori: sequestrant=10:5:15, the most favourable to Leucaena leucocephala (L.) growth, make Leucaena leucocephala (L.) bring up to 70% to the accumulation rate of plumbous zinc from 15%.
Compared with current Tailings Dam ecological recovery method and technical formula, the composite interstitial substance proportioning of the present invention's screening, mainly for the ecological recovery in the Pb-Zn tailings storehouse of moist area of southern China, the substrate formula of the plant-growth of suitable this area is proposed, reduce ecological recovery cost, decreasing pollution soil, effective resource of locality that utilizes carries out ecological recovery, reduce the rate of utilization of local soil resource, make Tailings Dam tailings as secondary resource efficiency utilization, substantially improve the ecotope of mining tailing wasteland, decrease environmental pollution, reduce comprehensive cost about 50%, improve economy, society and environmental benefit.
Embodiment 2:
Choose bridge mouth lead-zinc ore tailings storehouse, Hunan and carry out ecological recovery, mine tailing ecological recovery matrix and vegetation combination are applied to the side slope in bridge mouth lead-zinc ore tailings storehouse, Hunan, plain stage of slope and face, Gan Tan storehouse.Accumulative storage mine tailing 1,490,000 t in mine tailing Kuku, current mine tailing has been piled to 277.5m height, and its volume of cargo in storage is large, seriously polluted, produces certain heavy metal contamination to periphery agricultural land soil, brings certain impact to the living environment of nearby residents simultaneously.
Between side slope 30-40 °, length of grade 5-10m, the wide 1m of platform; Accumulative construction area 5000m
2, the construction seasons 3-6 month.
The ecological recovery matrix group adopted becomes: Tailings Dam tailings: city river bed mud: mineralized waste: maize straw mass ratio=50:5:10:10, water-holding agent: tamanori: sequestrant=10:5:15, planting plants is Leucaena leucocephala (L.), and adopt the mode of broadcasting sowing to plant, water covering curing afterwards.
Effect: germination in 2-5 days of constructing, basic Cheng Ping after two weeks, fraction of coverage reaches more than 95%, and after half a year, surviving rate still can reach more than 85%.Hypothallus experiences rainfall in a year and artificial water seasoning, and resistance to overturning is good, and heavy metal accumulation rate reaches 70%, reduces ecological recovery cost about 55%, has served well ecological and economic results in society.
The above; be only the good embodiment of invention, but protection scope of the present invention is not limited thereto, and is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion to authorize the protection domain of claims.
Claims (9)
1. the ecological recovery matrix in Pb-Zn tailings storehouse, is characterized in that, in mass parts, described matrix comprises: Tailings Dam tailings 45-55 part, organism 20-30 part, tailings conditioning agent 25-35 part;
Wherein, organism comprises city river bed mud 20-33 part, mineralized waste 25-40 part, agricultural waste 33-50 part; Tailings conditioning agent comprises water-holding agent 28.6-40 part, tamanori 16.7-28.6 part, sequestrant 40-50 part;
Described Tailings Dam tailings is the dry beach settling of the Pb-Zn tailings storehouse air-dry rear formation in surface, and particle diameter is 0.07-0.15mm;
Described city river bed mud is the product of municipal sewage plant's During High-Temperature Composting fermentation, water ratio 30-40%;
Described mineralized waste is the product of municipal waste plants screening and fermentation;
It is below 1cm that described agricultural waste is crushed to particle diameter, and interpolation decomposing agent and water become thoroughly decomposed.
2. the ecological recovery matrix in Pb-Zn tailings storehouse according to claim 1, it is characterized in that, described agricultural waste is maize straw.
3. the ecological recovery matrix in Pb-Zn tailings storehouse according to claim 1, it is characterized in that, described water-holding agent is polyacrylate.
4. the ecological recovery matrix in Pb-Zn tailings storehouse according to claim 1, it is characterized in that, described tamanori is polyacrylamide polymers.
5. the ecological recovery matrix in Pb-Zn tailings storehouse according to claim 1, it is characterized in that, described sequestrant is ethylenediamine tetraacetic acid (EDTA).
6. the ecological recovery matrix in Pb-Zn tailings storehouse according to claim 2, it is characterized in that, the substrate composition of common cattail is Tailings Dam tailings: city river bed mud: mineralized waste: maize straw=50:5:10:10, water-holding agent: tamanori: sequestrant=10:10:15;
The substrate composition of Leucaena leucocephala (L.) is Tailings Dam tailings: city river bed mud: mineralized waste: maize straw=50:5:10:10, water-holding agent: tamanori: sequestrant=10:5:15.
7. the preparation method of the ecological recovery matrix in the arbitrary described Pb-Zn tailings storehouse of claim 1-6, said method comprising the steps of: Tailings Dam tailings, organism and tailings conditioning agent are mixed at normal temperatures in proportion.
8. the side slope that formed in Mine Tailings storehouse, moist area of southern China of the ecological recovery matrix in the arbitrary described Pb-Zn tailings storehouse of claim 1-6 and platform and dry sand of tailings reservoir platform carry out the application in ecological recovery.
9. application according to claim 8, is characterized in that, described vegetation is common cattail and/or Leucaena leucocephala (L.).
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| CN106064980A (en) * | 2016-05-26 | 2016-11-02 | 北京矿冶研究总院 | Ecological restoration matrix for vanadium ore waste rock storage yard and preparation method and application thereof |
| CN107500880A (en) * | 2017-09-08 | 2017-12-22 | 大连青松智慧生态科技有限公司 | A kind of sludge and mine tailing mixed method |
| CN109537709A (en) * | 2018-12-25 | 2019-03-29 | 中国恩菲工程技术有限公司 | Tailings Dam closes library system and method, photovoltaic generating system, ecological restoring method |
| CN109601271A (en) * | 2018-12-28 | 2019-04-12 | 中冶沈勘工程技术有限公司 | A kind of Tailings Dam without native reclamation method |
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| CN113173763A (en) * | 2021-01-04 | 2021-07-27 | 中国有色金属工业昆明勘察设计研究院有限公司 | Artificial soil modified based on copper tailings and preparation method thereof |
| CN113817477A (en) * | 2021-10-26 | 2021-12-21 | 北京科技大学 | Modifying agent for ecological restoration of gold mine tailings and modifying method of gold mine tailings |
| CN114907858A (en) * | 2022-05-13 | 2022-08-16 | 长沙矿冶研究院有限责任公司 | Repairing agent for promoting tailing soil formation and preparation method and application thereof |
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| CN106064980A (en) * | 2016-05-26 | 2016-11-02 | 北京矿冶研究总院 | Ecological restoration matrix for vanadium ore waste rock storage yard and preparation method and application thereof |
| CN106064980B (en) * | 2016-05-26 | 2019-04-02 | 北京矿冶研究总院 | Ecological restoration matrix for vanadium ore waste rock storage yard and preparation method and application thereof |
| CN107500880A (en) * | 2017-09-08 | 2017-12-22 | 大连青松智慧生态科技有限公司 | A kind of sludge and mine tailing mixed method |
| CN109537709A (en) * | 2018-12-25 | 2019-03-29 | 中国恩菲工程技术有限公司 | Tailings Dam closes library system and method, photovoltaic generating system, ecological restoring method |
| CN109601271B (en) * | 2018-12-28 | 2021-12-07 | 中冶沈勘工程技术有限公司 | Soilless reclamation method for tailing pond |
| CN109601271A (en) * | 2018-12-28 | 2019-04-12 | 中冶沈勘工程技术有限公司 | A kind of Tailings Dam without native reclamation method |
| CN109673407A (en) * | 2019-01-08 | 2019-04-26 | 朱乐天 | Ore in sand form closes the restorative procedure of library ecology without native Nutrient medium and non-ferro metals debris library |
| CN111570498A (en) * | 2020-05-18 | 2020-08-25 | 中国地质科学院水文地质环境地质研究所 | Method for transforming heavy metal tailing slag into soil capable of growing plants |
| CN111670778A (en) * | 2020-05-29 | 2020-09-18 | 北京林业大学 | Slag matrix and preparation method and application thereof |
| CN113173763A (en) * | 2021-01-04 | 2021-07-27 | 中国有色金属工业昆明勘察设计研究院有限公司 | Artificial soil modified based on copper tailings and preparation method thereof |
| CN113817477A (en) * | 2021-10-26 | 2021-12-21 | 北京科技大学 | Modifying agent for ecological restoration of gold mine tailings and modifying method of gold mine tailings |
| CN113817477B (en) * | 2021-10-26 | 2022-12-09 | 北京科技大学 | Modifying agent for ecological restoration of gold mine tailings and modifying method of gold mine tailings |
| CN114907858A (en) * | 2022-05-13 | 2022-08-16 | 长沙矿冶研究院有限责任公司 | Repairing agent for promoting tailing soil formation and preparation method and application thereof |
| CN116076309A (en) * | 2022-12-14 | 2023-05-09 | 兰州大学 | Method for reconstructing near-natural vegetation of railway engineering track in alpine region |
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