CN101371639B - Surface layer soil for reclamation of mining - Google Patents
Surface layer soil for reclamation of mining Download PDFInfo
- Publication number
- CN101371639B CN101371639B CN2008101972147A CN200810197214A CN101371639B CN 101371639 B CN101371639 B CN 101371639B CN 2008101972147 A CN2008101972147 A CN 2008101972147A CN 200810197214 A CN200810197214 A CN 200810197214A CN 101371639 B CN101371639 B CN 101371639B
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- Prior art keywords
- soil
- topsoil
- reclaimation
- mining industry
- excess sludge
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- Y02P60/216—
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- Treatment Of Sludge (AREA)
Abstract
The invention relates to topsoil used for reclaimation in the mining industry and relates to soil reclaimation technology, aiming at solving the defects existing in the reclaimation method adopted at present that the survival rate of plants is low, or the source for soil dressing is not easy, or the cost is exorbitant and the problem that a large amount of residual sewage sludge generated during the city domestic sewage treatment can cause secondary pollution to the environment. The topsoil is composed of stripping soil, gangue sand and residual sewage sludge, and the weight percentage of each component is respectively 75-80 percent, 15-20 percent and 1-10 percent. The invention changes the wastes into valuable, not only radically solves the problem of soil lack in the reclaimation in the mining industry, but also has wide source of raw materials, simple processing technique, low cost of product and better environmental benefits and social benefits.
Description
Technical field
The present invention relates to the land reclamation technology, specifically a kind of reclaim substitution material of mesexine soil of mine waste land that relates to.
Background technology
Mining industry is produced when promoting economic development and also soil and environment has been caused greatly destruction, especially in the ore extraction process, produce peel off soil and ore dressing in a large number the time a large amount of CHARACTERISTICS OF TAILINGS SAND of producing, not only occupied a large amount of land resources, and because the two does not all possess soil activation and fertility, thereby cause soil depletion, be unfavorable for plant growing.Though and the engineering that adopts is at present reclaimed and biological reclamation two classes reclamation method commonly used to the mine waste land reclaim and the recovery tool of ecology of mining areas balance has certain effect, but still existence or plant survival rate are low, or the soil moved in to improve the original source is difficult, or cost is crossed high defective.In addition, though a large amount of excess sludges that city domestic sewage produces in handling contain large amount of organic and can promote nitrogen, phosphorus, potassium and other trace element of crop growth, be a kind of natural organic fertilizer, if mishandling, can cause secondary pollution to environment.
Summary of the invention
The objective of the invention is at the problems referred to above provide that a kind of raw material source is wide, production technology is simple, low cost product, can turn waste into wealth be used for the topsoil that mining industry is reclaimed.
The present invention forms by peeling off soil, CHARACTERISTICS OF TAILINGS SAND and excess sludge, and the percentage by weight of each component is for peeling off native 75%-80%, CHARACTERISTICS OF TAILINGS SAND 15%-20%, excess sludge 1%-10%.
The optimum weight percentage of above-mentioned each component is for peeling off soil 78.5%, CHARACTERISTICS OF TAILINGS SAND 18.5%, excess sludge 3%.
Said soil and the CHARACTERISTICS OF TAILINGS SAND peeled off is to peel off soil and CHARACTERISTICS OF TAILINGS SAND in the iron ore exploitation, and said excess sludge is the excess sludge of city domestic sewage treatment plant.
Discarded object during the present invention produces mining industry is peeled off soil and the CHARACTERISTICS OF TAILINGS SAND excess sludge in handling with city domestic sewage and is mixed and made into and has certain nutrient and activity, be beneficial to pionner and land the topsoil of growing, thereby turn waste into wealth, can not only fundamentally solve the soil of mining industry in reclaiming and lack problem, and the raw material source is wide, production technology is simple, low cost product, has environmental benefit and social benefit preferably.
Embodiment
Further specify the present invention below in conjunction with embodiment.
Embodiment 1: respectively from iron ore refuse dump and tailing dam get particle diameter be 0.1-20mm peel off soil and particle diameter is the CHARACTERISTICS OF TAILINGS SAND of 0.01-0.1mm, get the excess sludge that pH value is 7.0-8.0 from city domestic sewage factory, wherein, the yellow earth of combining of principal component of peeling off soil contains a small amount of dolomite and lime stone, the principal component silica of CHARACTERISTICS OF TAILINGS SAND contains a small amount of dolomite and limestone particle, general nitrogenous 4%, the phosphorus 1.4% of the principal component of excess sludge, potassium 0.9% and organic 30%, its preparation method is:
1, the excess sludge with water content about 80% dewaters to water content about 50%, deliver to fermenting case and carry out aerobic fermentation, ventilation 100L/h, 3 times, each 0.5 hour every day of ventilation time, the control fermentation temperature is less than 65 ℃, and fermentation time 30-40 days, tunning was delivered to roller drier and is dried to water content below 10%, the broken 60-80 mesh sieve of also crossing, the tunning after sieving is the excess sludge of handling;
2, will peel off soil and CHARACTERISTICS OF TAILINGS SAND natural air drying, and peel off soil and go bulk, cross the 5mm sieve;
3, the excess sludge that will handle with sieve after peel off soil and CHARACTERISTICS OF TAILINGS SAND is mixed in proportion, delivering to KJ2 type agitator stirs, the outlet material is topsoil of the present invention, wherein, the mixed proportion of each component is by weight percentage for peeling off soil 75%, CHARACTERISTICS OF TAILINGS SAND 15%, excess sludge 10%.
Embodiment 2: for peeling off soil 75%, CHARACTERISTICS OF TAILINGS SAND 20%, excess sludge 5%, other is with embodiment 1 by weight percentage for the mixed proportion of each component.
Embodiment 3: for peeling off soil 80%, CHARACTERISTICS OF TAILINGS SAND 15%, excess sludge 5%, other is with embodiment 1 by weight percentage for the mixed proportion of each component.
Embodiment 4: for peeling off soil 78.5%, CHARACTERISTICS OF TAILINGS SAND 18.5%, excess sludge 3%, other is with embodiment 1 by weight percentage for the mixed proportion of each component.
Topsoil of the present invention carries out the pot plant test and shows, because the particle of peeling off soil greatly, easily harden, be used alone as topsoil and be unfavorable for plant growing, to peel off soil, CHARACTERISTICS OF TAILINGS SAND and excess sludge mixes, CHARACTERISTICS OF TAILINGS SAND can play the effect of regulating soil grades, prevention soil compaction, excess sludge plays to be increased soil nutrient and regulates organic effect, from promoting plant growing, dispose the angle that soil and CHARACTERISTICS OF TAILINGS SAND are peeled off in excess sludge and utilization, native 78.5% for peeling off by weight percentage, CHARACTERISTICS OF TAILINGS SAND 18.5%, excess sludge 3% are best proportioning.
The conventional using method of topsoil of the present invention:
1, is used for mining industry abandoned land hole planting and drill planting method forestry is reclaimed
The mining industry abandoned land is carried out consolidation, be used for forestry and reclaim ground line gradient less than 25 ℃; Dig pit on smooth good soil or plant ditch, hole or plantation ditch size are by kind plant seedlings thickness, height and the decision of forestry plantation standard; Lay the thick topsoil of 10cm earlier at the hole end or bottom of trench, kind planted seedlings implant in the hole or in the ditch, dose all around the topsoil height to the surface, soil, compacting and watering routinely.
2, being used for mining industry abandoned land soil moved in to improve the original method agricultural reclaims
The mining industry abandoned land is carried out consolidation, be used for agricultural and reclaim ground line gradient less than 5 ℃; On smooth good soil, the topsoil earthing greater than 20cm, is constituted the abandoned land topsoil soils of reclaiming, the seed of economic crops is shed on topsoil soils the agricultural tillage management of watering routinely.
3, be used for the greening of mining industry abandoned land plantation herbaceous plant
The mining industry abandoned land is carried out consolidation, and ground line gradient is less than 25 ℃; Herbal seed is mixed in topsoil, and the herbal seed of 100kg topsoil mixing 0.1kg stirs; On the abandoned land of having put in order, evenly shed the topsoil that contains herbaceous plant seeds, the agricultural tillage management of watering routinely.
Claims (2)
1. one kind is used for the topsoil that mining industry is reclaimed, it is characterized in that by peeling off soil and CHARACTERISTICS OF TAILINGS SAND and form in the iron ore exploitation through the excess sludge that aerobic fermentation is handled in earlier stage, the percentage by weight of each component is for peeling off native 75%-80%, CHARACTERISTICS OF TAILINGS SAND 15%-20%, excess sludge 1%-10%, wherein, the technological parameter that described aerobic fermentation is handled in earlier stage is ventilation 100L/h, 3 times, each 0.5 hour every day of ventilation time, the control fermentation temperature is less than 65 ℃, fermentation time 30-40 days.
2. be used for the topsoil that mining industry is reclaimed by claim 1 is described, the percentage by weight that it is characterized in that said each component is for peeling off soil 78.5%, CHARACTERISTICS OF TAILINGS SAND 18.5%, excess sludge 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101972147A CN101371639B (en) | 2008-10-09 | 2008-10-09 | Surface layer soil for reclamation of mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101972147A CN101371639B (en) | 2008-10-09 | 2008-10-09 | Surface layer soil for reclamation of mining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101371639A CN101371639A (en) | 2009-02-25 |
| CN101371639B true CN101371639B (en) | 2011-09-28 |
Family
ID=40446177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101972147A Expired - Fee Related CN101371639B (en) | 2008-10-09 | 2008-10-09 | Surface layer soil for reclamation of mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101371639B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104082056A (en) * | 2014-07-01 | 2014-10-08 | 中国矿业大学(北京) | Screening method for replacing surface soil of strip mine reclamation |
| CN104177150B (en) * | 2014-07-31 | 2016-08-17 | 湖南鑫生矿冶废弃物综合利用科技有限公司 | Iron tailings residue Reclaimed Soil and preparation method |
| CN106278072A (en) * | 2016-08-15 | 2017-01-04 | 大连地拓重工有限公司 | A kind of method without soil tailings |
| CN109089453B (en) * | 2018-08-23 | 2021-11-30 | 大连地拓环境科技有限公司 | Soil system reconstruction method for reclaiming abandoned mine into forest land |
| NO20200292A1 (en) * | 2020-03-11 | 2021-09-13 | Norsk Hydro As | Method and System for Long-Term Management of Bauxite Mining Tailings |
| CN113396795B (en) * | 2021-06-16 | 2022-11-25 | 长江水利委员会长江科学院 | Foreign soil and soil layer structure based on river and lake bottom mud and phosphorite solid waste and preparation method |
-
2008
- 2008-10-09 CN CN2008101972147A patent/CN101371639B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 李海波等.中国城市污泥资源化利用研究进展.《三峡环境与生态》.2008,第1卷(第2期),42-45. * |
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| Publication number | Publication date |
|---|---|
| CN101371639A (en) | 2009-02-25 |
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Granted publication date: 20110928 Termination date: 20121009 |