CN111014266A - Red mud yard soil improvement method - Google Patents
Red mud yard soil improvement method Download PDFInfo
- Publication number
- CN111014266A CN111014266A CN201911366388.6A CN201911366388A CN111014266A CN 111014266 A CN111014266 A CN 111014266A CN 201911366388 A CN201911366388 A CN 201911366388A CN 111014266 A CN111014266 A CN 111014266A
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- China
- Prior art keywords
- red mud
- yard
- compound material
- soil
- improvement method
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- 239000002689 soil Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000006872 improvement Effects 0.000 title claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000002378 acidificating effect Effects 0.000 claims abstract description 17
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 16
- 239000010440 gypsum Substances 0.000 claims abstract description 16
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 241001233061 earthworms Species 0.000 claims abstract description 12
- 235000021419 vinegar Nutrition 0.000 claims abstract description 11
- 239000000052 vinegar Substances 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 9
- 230000007480 spreading Effects 0.000 claims abstract description 7
- 238000007873 sieving Methods 0.000 claims abstract description 5
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical group O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims abstract description 4
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 6
- 230000008635 plant growth Effects 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Cultivation Of Plants (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides a red mud yard soil improvement method, which comprises the following steps: firstly, crushing and sieving a gypsum matrix, and then uniformly mixing the crushed and sieved gypsum matrix with acidic organic residues to obtain a compound material, wherein the acidic organic residues comprise at least one of vinegar residues, vinasse and furfural residues, then uniformly spreading the compound material on a red mud yard according to 50-100 kg per square meter, fully mixing the compound material with the red mud by using a rotary cultivator, then performing watering ageing treatment on the red mud yard for more than 5 days, and finally putting 5-20 earthworms into the red mud per square meter. The method is suitable for improving the soil property of the red mud storage yard, has low cost, and can effectively reduce the alkalinity and the salt content of the red mud by matching acidic organic matters with earthworms, so that the soil property quickly becomes suitable for plant growth, and necessary conditions are created for ecological restoration.
Description
Technical Field
The invention belongs to the technical field of aluminum industry waste residue treatment, and particularly relates to a red mud yard soil improvement method.
Background
The red mud is polluting waste residue discharged during extracting alumina in the aluminum industry, the red mud is mainly treated by a seabed or land stacking treatment mode at present, but with the continuous development of the aluminum industry, the red mud discharged during producing alumina is increased day by day, and a series of problems caused by stacking treatment are caused, so that the serious environmental pollution is caused.
The land property of the red mud yard is high salt and high alkali, which seriously restricts the normal growth of plants, and leads the red mud yard to be difficult to realize ecological restoration autonomously. The existing red mud yard soil improvement methods are mainly divided into medicament improvement and microorganism improvement, wherein the medicament improvement is to neutralize the alkalinity of the red mud by adding acid chemical substances, but the following defects exist: 1. the use amount of the acidic additive is large, and the cost is high; 2. although the salt content of the red mud is effectively reduced, the effect of promoting the red mud to be in soil is weak, and other manual intervention means such as soil covering, transplanting and the like are often required to be matched.
Disclosure of Invention
The invention aims to provide a method for improving red mud yard soil, which comprises the following specific scheme:
a red mud yard soil improvement method comprises the following steps:
1) crushing and sieving a gypsum matrix, and uniformly mixing the crushed gypsum matrix with acidic organic residues to obtain a compound material;
2) uniformly spreading the compound material on a red mud yard, and fully mixing the compound material with the red mud by using a rotary cultivator;
3) carrying out water spraying and aging treatment on the red mud storage yard;
4) earthworms are put into the treated red mud.
Preferably, the mass ratio of the components in the obtained compound material is 30-120: 1-20.
Preferably, the acidic organic residue comprises at least one of vinegar residue, distillers' grains, and furfural residue.
Preferably, the gypsum matrix comprises at least one of phosphogypsum and desulphurisation gypsum.
Preferably, the acidic organic residue comprises vinegar residues and vinasse, and the mass ratio of the vinegar residues to the vinasse is 1-50: 30-70.
Preferably, 50-100 kg of the compound material is paved on each square meter of red mud.
Preferably, in the step 3), the humidity of the red mud yard is always kept above 30% through multiple watering operations.
Preferably, in the step 3), the aging time of the red mud yard is more than 5 days.
Preferably, in the step 4), the putting amount of earthworms per square meter of red mud is 5-20.
The technical scheme provided by the invention at least has the following beneficial effects:
1. the invention provides a soil improvement method suitable for a red mud yard, which can quickly improve the surface soil property of the red mud yard by mixing acidic organic residues in the red mud and putting the acidic organic residues into earthworms, effectively reduce the alkalinity and the salt content of the red mud, quickly change the soil property into suitable plant growth and create necessary conditions for ecological restoration.
2. The acidic organic residue of the invention adopts at least one of vinegar residue, vinasse and furfural residue, which is low in price, provides a large amount of organic matters for the soil preparation of red mud, is easy to form humus after being aged and treated by earthworms in a humid environment, is beneficial to plant growth, and realizes quick greening of a storage yard; in addition, the recycling of industrial and agricultural wastes and residues is realized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1
A red mud yard soil improvement method comprises the following steps:
1) crushing and sieving a gypsum matrix, and uniformly mixing the crushed gypsum matrix with acidic organic residues to obtain a compound material;
2) uniformly spreading the compound material on a red mud yard, correspondingly spreading 50 kilograms of the compound material on each square meter of red mud, and fully mixing the compound material with the red mud by utilizing a rotary cultivator;
3) carrying out watering ageing treatment on the red mud yard, keeping the humidity of the red mud yard above 40% all the time, and keeping the ageing time for one week;
4) earthworms are put into the treated red mud, and the putting amount of the earthworms per square meter of the red mud is 5.
In this example, the gypsum matrix is phosphogypsum, and the acidic organic residues include vinegar residues and vinasse.
In this example, the mass ratio of the components in the composite material is vinegar residue to vinasse to phosphogypsum is 10 to 30 to 20.
Comparative example 1
The operation process of this embodiment is as follows:
1) crushing and sieving a gypsum matrix, and uniformly mixing the crushed gypsum matrix with acidic organic residues to obtain a compound material;
2) uniformly spreading the compound material on a red mud yard, correspondingly spreading 50 kilograms of the compound material on each square meter of red mud, and fully mixing the compound material with the red mud by utilizing a rotary cultivator;
3) the water spraying and aging treatment is carried out on the red mud yard, the humidity of the red mud yard is always kept above 40 percent, and the aging time is one week.
In this example, the gypsum matrix is phosphogypsum, and the acidic organic residues include vinegar residues and vinasse.
In this example, the mass ratio of the components in the composite material is vinegar residue to vinasse to phosphogypsum is 10 to 30 to 20.
Two areas with basically the same conditions are marked in the same red mud yard, the above example 1 and the comparative example 1 are respectively implemented in the same time period, after the operation is finished, the pH value, the conductivity, the organic carbon content and the porosity data of the soil are sampled and measured every five days, and the obtained result is shown in the following table.
Soil improvement results in a surface-red mud yard
From the above table, the red mud yard soil improvement method provided by the invention can indeed rapidly improve the surface soil property of the red mud yard, compared with comparative example 1, in example 1, the soil humidity is maintained, and the decomposition effect of earthworms is matched, so that the reduction speed of the organic carbon content in the soil is slow under the condition of no external artificial secondary organic matter addition, and the smooth growth of plants is ensured; in addition, the activity of the earthworms in the soil can reduce the soil hardening degree, improve the porosity, facilitate the respiration of plant roots, and also facilitate the rapid infiltration of water to dissolve out the salt content (the conductivity is reduced) of the soil, reduce the salt content and the alkalinity of the red mud, and accelerate the ecological restoration process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and various modifications and changes may be made by those skilled in the art. Any improvement or equivalent replacement directly or indirectly applied to other related technical fields within the spirit and principle of the invention and the contents of the specification and the drawings of the invention shall be included in the protection scope of the invention.
Claims (9)
1. The method for improving the soil of the red mud disposal site is characterized by comprising the following steps:
1) crushing and sieving a gypsum matrix, and uniformly mixing the crushed gypsum matrix with acidic organic residues to obtain a compound material;
2) uniformly spreading the compound material on a red mud yard, and fully mixing the compound material with the red mud by using a rotary cultivator;
3) carrying out water spraying and aging treatment on the red mud storage yard;
4) earthworms are put into the treated red mud.
2. The red mud yard soil improvement method according to claim 1, wherein the mass ratio of the components in the obtained composite material is 30-120: 1-20.
3. The red mud yard soil improvement method according to claim 2, wherein said acidic organic residue comprises at least one of vinegar residue, distiller's grains, and furfural residue.
4. The red mud yard soil improvement method according to claim 3, wherein the acidic organic residue comprises vinegar residue and vinasse in a mass ratio of 1-50: 30-70.
5. The red mud yard soil improvement method according to claim 2, wherein said gypsum matrix comprises at least one of phosphogypsum and desulfurized gypsum.
6. The red mud disposal soil improvement method according to claim 2, wherein 50-100 kg of the compound material is spread per square meter of red mud.
7. The method for improving the soil in a red mud dump according to claim 1, wherein in the step 3), the humidity of the red mud dump is always maintained at 40% or more by a plurality of watering operations.
8. The method for improving the soil in a red mud dump according to claim 7, wherein the aging time of the red mud dump in the step 3) is 5 days or more.
9. The red mud yard soil improvement method according to any one of claims 2 to 8, wherein in the step 4), the amount of earthworms put in per square meter of red mud is 5 to 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366388.6A CN111014266A (en) | 2019-12-26 | 2019-12-26 | Red mud yard soil improvement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366388.6A CN111014266A (en) | 2019-12-26 | 2019-12-26 | Red mud yard soil improvement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111014266A true CN111014266A (en) | 2020-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911366388.6A Pending CN111014266A (en) | 2019-12-26 | 2019-12-26 | Red mud yard soil improvement method |
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| Country | Link |
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| CN (1) | CN111014266A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500226A (en) * | 2020-12-16 | 2021-03-16 | 中国有色金属长沙勘察设计研究院有限公司 | Composition for red mud modification and preparation method of composition |
| CN112616615A (en) * | 2020-12-16 | 2021-04-09 | 中国有色金属长沙勘察设计研究院有限公司 | Red mud modification method |
| CN112655515A (en) * | 2020-12-16 | 2021-04-16 | 中铝环保生态技术(湖南)有限公司 | Method for converting red mud into soil |
| CN115805229A (en) * | 2022-11-24 | 2023-03-17 | 贵州大学 | Red mud alkalinity regulation and control method |
| CN116076189A (en) * | 2022-11-23 | 2023-05-09 | 中铝环保节能集团有限公司 | Method for promoting improvement of red mud soil formation and vegetation recovery by sintering process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500226A (en) * | 2020-12-16 | 2021-03-16 | 中国有色金属长沙勘察设计研究院有限公司 | Composition for red mud modification and preparation method of composition |
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| CN112655515A (en) * | 2020-12-16 | 2021-04-16 | 中铝环保生态技术(湖南)有限公司 | Method for converting red mud into soil |
| CN116076189A (en) * | 2022-11-23 | 2023-05-09 | 中铝环保节能集团有限公司 | Method for promoting improvement of red mud soil formation and vegetation recovery by sintering process |
| CN115805229A (en) * | 2022-11-24 | 2023-03-17 | 贵州大学 | Red mud alkalinity regulation and control method |
| CN115805229B (en) * | 2022-11-24 | 2023-11-24 | 贵州大学 | Red mud alkalinity regulating and controlling method |
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Application publication date: 20200417 |
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