CN203167544U - Isolated layer for reclamation returning of tail slag field with toxic heavy metals - Google Patents
Isolated layer for reclamation returning of tail slag field with toxic heavy metals Download PDFInfo
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- CN203167544U CN203167544U CN 201320212389 CN201320212389U CN203167544U CN 203167544 U CN203167544 U CN 203167544U CN 201320212389 CN201320212389 CN 201320212389 CN 201320212389 U CN201320212389 U CN 201320212389U CN 203167544 U CN203167544 U CN 203167544U
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Abstract
The utility model discloses an Isolated layer for reclamation returning of tail slag field with toxic heavy metals, wherein the tail slag field is provided with a heavy metal isolated layer which consists of a concrete layer, a pure land layer is rolled on the concrete layer, and a compacted pure land layer is arranged on the rolled pure land layer. The Isolated layer for reclamation returning of tail slag field with toxic heavy metals in the embodiment effectively reduces engineering cost which is caused by overlarge thickness of covering soil because of returning reclamation under the premise that edible safety of staple crops is guaranteed, effectively increases arable area by returning reclamation, and has important social, environmental and economic benefits for reducing heavy metal pollution of soil and water environment, releasing the quantity of cultivated lands which are continuously reduced because of urbanization construction. The Isolated layer for reclamation returning of tail slag field with toxic heavy metals improves practical and promotion effects of returning reclamation technology by arranging the isolated layer.
Description
Technical field
The utility model belongs to the mine tailings technical field of reclaiming, and relates in particular to a kind of mine tailings field that contains poisonous heavy metal also separation layer in field of reclaiming.
Background technology
Owing to the economic technology reason, existing technique of preparing technology can not all extract all useful metallic elements in the mine tailings, therefore certainly exist the heavy metal of certain content (with respect to national agricultural land soil environmental quality secondary limit value in the mine tailings of storing up, its content is tens times～up to ten thousand times of agricultural land soil normally), this be deposited in the cheuch or the Plain low-lying land in mine tailings, can raise in big wind, under the effect of precipitation shower, wherein heavy metal element can cause surface water, content of beary metal in underground water and the agricultural land soil obviously increases, when serious in the water and soil environment content of beary metal can surpass several times～tens times of the limit value standards of national water and soil environment, directly cause wheat, corn, content of beary metal exceeds standard in the vegetables, directly or indirectly endangers population health safety.
At present contain the mine tailings field (the mine tailing storehouse of namely containing heavy metal metal element) of poisonous heavy metal both at home and abroad when reclaiming, because worrying the malicious heavy metal in the mine tailings enters the crops of the back plantation of reclaiming and causes crops to exceed standard, therefore at present the main application after mine tailings are reclaimed is the planting trees and grass greening environment, plays blocking-up mine tailings airborne dust or water and soil loss and pollutes the purpose of peripheral water and soil environment.
Poison heavy metal mine tailings field is reclaimed also, and the primary preceding topic in field is to ensure the crops edible safety, and ensure the crops edible safety reclaim also that there is dual mode in the field: (1) the one, the pure land layer thickness that covers is thick (someone studies and thinks that the thickness of soil of reclaiming of plantation wheat should surpass 1.2m) enough, could ensure that the heavy metal element that covers down in the mine tailings does not rise by capillarity enters plow layer, but obviously this kind method needs enough Tu Yuan and the high cost of reclaiming (fetch earth, muck haulage and spread geotechnological journey cost); (2) the 2nd, adopt a kind of new technical method, between mine tailings and overlying soil, form a kind of separation layer, and this separation layer is because having economic operability, effectively the blocking-up heavy metal enters in the plow layer after reclaiming, when reducing the engineering cost of reclaiming greatly, the proportion of crop planting safety after guaranteeing to reclaim.
Reclaim and go back the technology of field crops safety economy case in the present mine tailing storehouse that does not also contain poisonous heavy metal.
The utility model content
The purpose of the utility model embodiment is to provide a kind of mine tailings field that contains poisonous heavy metal also separation layer in field of reclaiming, and is intended to solve the mine tailing storehouse that the contains poisonous heavy metal also problem of field proportion of crop planting of reclaiming.
The utility model embodiment realizes like this, reclaim and go back the separation layer in field in a kind of mine tailings field that contains poisonous heavy metal, the described mine tailings field that contains poisonous heavy metal is reclaimed also, and the separation layer in field comprises: lay the tabia layer in the mine tailings field, the pure land layer of earthing compaction by rolling on the separation layer that constitutes with the tabia layer has the pure land layer of compacting at the pure land layer of compaction by rolling.
Further, the thickness of described tabia layer is 10cm, and the pure land layer thickness of described covering compaction by rolling is 40cm, and the pure land layer of described compacting is 30cm.
Reclaim and go back the separation layer in field in the mine tailings field that contains poisonous heavy metal that the utility model embodiment provides, the characteristics that have economy and promote easily, under the prerequisite that ensures large crops edible safety, reduced the engineering cost height of reclaiming that brings because of the excessive native source deficiency that causes of field thickness of earth covering also of reclaiming, haul distance is big, the laying project amount is big etc. effectively, reclaim also that the field effectively increases arable area, for reducing the heavy metal pollution of peripheral water and soil environment, alleviating the quantity of cultivated land that constantly reduces because of the urbanization construction and have important social benefit, environmental benefit and economic benefit.And by the setting of separation layer, reclaim also practicality and the popularizing action of field technology have been improved.
Description of drawings
Fig. 1 is to reclaim and the soil profile figure of the separation layer in field in the mine tailings field that contains poisonous heavy metal that the utility model embodiment provides.
Among the figure: the mine tailings field that 1, contains poisonous heavy metal; 2, tabia separation layer; 3, the pure land layer of compaction by rolling; 4, the pure land layer of compacting.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Reclaim and go back the separation layer in field in the mine tailings field that contains poisonous heavy metal that the utility model embodiment provides, the closely knit fluid-tight separation layer that has the tabia layer to constitute in the mine tailings field, the separation layer that constitutes at the tabia layer has the pure land layer of compaction by rolling, and the pure land layer of compacting is arranged at the pure land layer of compaction by rolling.
As the utility model embodiment one prioritization scheme, the thickness of the separation layer that the tabia layer constitutes is 10cm, and the pure land layer thickness of compaction by rolling is 40cm, and the pure land layer of compacting is 30cm.
The also soil profile figure of the separation layer in field reclaims in the mine tailings field that contains poisonous heavy metal that Fig. 1 shows the utility model embodiment to be provided.
Reclaim and go back the separation layer in field in the mine tailings field that contains poisonous heavy metal that the utility model embodiment provides, comprise: the mine tailings field 1 that contains poisonous heavy metal, 1 lays the closely knit fluid-tight separation layer 2 that the tabia layer constitutes in the mine tailings field, transport outward the pure land layer 3 that is coated with compaction by rolling at the separation layer 2 that the tabia layer constitutes, the pure land layer 4 of compacting is arranged at the pure land layer 3 of compaction by rolling.
As the utility model embodiment one prioritization scheme, the thickness of the separation layer 2 that the tabia layer constitutes is 10cm, and the pure land layer thickness of compaction by rolling is 40cm, and the pure land layer of compacting is 30cm.
In the utility model embodiment, with mine tailings field 1 push away flat, roll sturdy, according to building the drain ditch around the physical features gradient, pushing away on the mine tailings field 1 of flat compaction by rolling, laying the tabia layer of compaction by rolling as separation layer 2, the thickness of the separation layer 2 that the tabia layer constitutes is 10cm, loess, white lime, fine sand component ratio are 5: 3: 2, pave, compaction by rolling (paving spray water 5～10% in the compaction by rolling process), form fine and close water barrier, stop capillarity; Cover the pure land layer 3 of compactions by rolling at the separation layer 2 of tabia layer formation, the pure land layer thickness of compaction by rolling is 40cm, pure land layer 3 at compaction by rolling covers the pure land layer 4 of compacting again, the pure land layer of compacting is 30cm, namely add up to outward transport pure land compaction by rolling thickness to add up to 70cm, adopting the rotary tillage maneuver plough degree of depth is 20～25cm.(20～25cm) soil-ripenings and nutrient laden can comprehensively use nitrogenous fertilizer, phosphate fertilizer, farmyard manure etc. to mix and use, and the time is 1 year, accelerates soil-ripening and nutrient laden, and the crops of plantation are dry land crops such as wheat, corn to cover pure land plow layer.
The utility model embodiment is under the prerequisite that ensures large crops edible safety, reduced effectively because of the also excessive engineering cost that causes of field thickness of earth covering of reclaiming, reclaim also that the field effectively increases arable area, for reducing environmental pollution, alleviating the quantity of cultivated land that constantly reduces because of the urbanization construction and have important social benefit, environmental benefit and economic benefit.And by the setting of separation layer, reclaim also practicality and the popularizing action of field technology have been improved.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. reclaim and the separation layer in field in a mine tailings field that contains poisonous heavy metal, it is characterized in that, the described mine tailings field that contains poisonous heavy metal is reclaimed also, and the separation layer in field comprises: in the mine tailings field tabia layer is set, the separation layer that constitutes at the tabia layer has the pure land layer that covers compaction by rolling, and the pure land layer of compacting is arranged at the pure land layer of compaction by rolling.
2. reclaim and go back the separation layer in field in the mine tailings field that contains poisonous heavy metal as claimed in claim 1, it is characterized in that the thickness of described tabia layer is 10cm, and the pure land layer thickness of described compaction by rolling is 40cm, and the pure land layer of described compacting is 30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212389 CN203167544U (en) | 2013-04-19 | 2013-04-19 | Isolated layer for reclamation returning of tail slag field with toxic heavy metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212389 CN203167544U (en) | 2013-04-19 | 2013-04-19 | Isolated layer for reclamation returning of tail slag field with toxic heavy metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203167544U true CN203167544U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320212389 Expired - Lifetime CN203167544U (en) | 2013-04-19 | 2013-04-19 | Isolated layer for reclamation returning of tail slag field with toxic heavy metals |
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| CN (1) | CN203167544U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210715A (en) * | 2013-04-27 | 2013-07-24 | 中国地质调查局西安地质调查中心 | Safe and economical method of reclaiming tillable field from tailing residue field containing toxic heavy metal |
| CN103262727A (en) * | 2013-04-27 | 2013-08-28 | 中国地质调查局西安地质调查中心 | Manufacturing method of tail slag field reclamation returning-to-farmland isolation layer |
| CN106552806A (en) * | 2016-11-16 | 2017-04-05 | 湖南省园林建设有限公司 | Solid waste stacks field method for innocent treatment |
-
2013
- 2013-04-19 CN CN 201320212389 patent/CN203167544U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210715A (en) * | 2013-04-27 | 2013-07-24 | 中国地质调查局西安地质调查中心 | Safe and economical method of reclaiming tillable field from tailing residue field containing toxic heavy metal |
| CN103262727A (en) * | 2013-04-27 | 2013-08-28 | 中国地质调查局西安地质调查中心 | Manufacturing method of tail slag field reclamation returning-to-farmland isolation layer |
| CN103262727B (en) * | 2013-04-27 | 2016-02-03 | 中国地质调查局西安地质调查中心 | A kind of manufacture method of tail slag field reclamation returning-to-farmlanisolation isolation layer |
| CN106552806A (en) * | 2016-11-16 | 2017-04-05 | 湖南省园林建设有限公司 | Solid waste stacks field method for innocent treatment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |