CN116286017A - Method for preparing saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid and saline-alkali soil conditioner - Google Patents
Method for preparing saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid and saline-alkali soil conditioner Download PDFInfo
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- CN116286017A CN116286017A CN202310539704.5A CN202310539704A CN116286017A CN 116286017 A CN116286017 A CN 116286017A CN 202310539704 A CN202310539704 A CN 202310539704A CN 116286017 A CN116286017 A CN 116286017A
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- saline
- soil conditioner
- alkali soil
- fly ash
- leaching
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 61
- 239000010881 fly ash Substances 0.000 title claims abstract description 58
- 239000003513 alkali Substances 0.000 title claims abstract description 56
- 239000003516 soil conditioner Substances 0.000 title claims abstract description 49
- 238000002386 leaching Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- QPILZZVXGUNELN-UHFFFAOYSA-N sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonic acid Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S(O)(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-N 0.000 title claims abstract 9
- 238000000855 fermentation Methods 0.000 claims abstract description 37
- 230000004151 fermentation Effects 0.000 claims abstract description 37
- 239000010902 straw Substances 0.000 claims abstract description 33
- 210000003608 fece Anatomy 0.000 claims abstract description 29
- 239000010871 livestock manure Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 15
- 239000002956 ash Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 241000894006 Bacteria Species 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- 244000005700 microbiome Species 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 241000196324 Embryophyta Species 0.000 claims description 11
- 240000008042 Zea mays Species 0.000 claims description 7
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 7
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 7
- 238000010564 aerobic fermentation Methods 0.000 claims description 7
- 235000005822 corn Nutrition 0.000 claims description 7
- 241000194108 Bacillus licheniformis Species 0.000 claims description 6
- 241000186226 Corynebacterium glutamicum Species 0.000 claims description 5
- 241001494479 Pecora Species 0.000 claims description 5
- 241000191996 Pediococcus pentosaceus Species 0.000 claims description 5
- 241000209140 Triticum Species 0.000 claims description 5
- 235000021307 Triticum Nutrition 0.000 claims description 5
- 240000006394 Sorghum bicolor Species 0.000 claims description 3
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 3
- 238000009629 microbiological culture Methods 0.000 claims description 3
- 244000144977 poultry Species 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 16
- 239000002689 soil Substances 0.000 abstract description 16
- 230000006872 improvement Effects 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000010883 coal ash Substances 0.000 abstract 1
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- QPILZZVXGUNELN-UHFFFAOYSA-M sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonate;hydron Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S([O-])(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-M 0.000 description 35
- 239000000047 product Substances 0.000 description 20
- 239000002253 acid Substances 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920000876 geopolymer Polymers 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002881 soil fertilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention discloses a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid and the saline-alkali soil conditioner, and relates to the technical field of industrial solid waste recycling and soil conditioning. The preparation method comprises the following steps: 1) Mixing manure, municipal sludge, plant ash and crushed straw to obtain a mixed material; 2) Adding microorganism bacteria into the mixed material obtained in the step 1) for mixed fermentation to obtain a fermentation product; 3) Mixing the fly ash acid leached aluminum tailings with a fermentation product, and then drying to obtain the saline-alkali soil conditioner. The technical scheme of the invention solves the problems of high process cost, resource waste and unstable raw materials of the existing saline-alkali soil conditioner, fully utilizes solid wastes such as coal ash hydrochloric acid leaching tailings, municipal sludge and the like to synthesize the saline-alkali soil conditioner, and has the advantages of wide raw material sources, low production cost, good product stability, good soil improvement effect and the like.
Description
Technical Field
The invention relates to the technical field of industrial solid waste recycling and soil improvement, in particular to a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid and the saline-alkali soil conditioner.
Background
In recent years, along with the discovery of high-alumina coal resources in the western part of the inner Mongolia autonomous region and the northern part of the Shaanxi, various technical routes are formed for extracting and utilizing valuable elements in high-alumina fly ash generated by coal-fired power generation, wherein a fly ash hydrochloric acid leaching process has formed a plurality of engineering projects, a main technical route adopts hydrochloric acid solution to leach alumina in the fly ash at a certain temperature to generate aluminum chloride solution and acid leached aluminum tailings, the aluminum chloride solution can further produce other aluminum series products such as polyaluminium chloride water purifying agent, aluminum oxide and the like, the main components of the acid leached aluminum tailings are silicon dioxide, a small amount of aluminum oxide, ferric oxide, calcium oxide, titanium dioxide and the like, and meanwhile, the pH value of the acid leached aluminum tailings is acidic due to the fact that a small amount of acid is remained, the acid is difficult to be utilized by adopting conventional process resources, and development of a process technology capable of fully utilizing the acidic characteristics of the acid leached aluminum tailings is needed to be utilized.
The technology disclosed and reported for comprehensive utilization of the fly ash acid leached aluminum tailings forms the preparation of heat insulation boards, white carbon black, bricks, molecular sieves, geopolymers, rubber fillers and the like, the prior art focuses on the physical properties of the acid leached aluminum tailings and extracts silicon resources applied to the acid leached aluminum tailings, and the acid characteristics and the rich silicon resources of the acid leached aluminum tailings are not involved in the growth promotion effect of crops.
On the other hand, according to incomplete statistics of textbook organizations and grain and agricultural organizations of united nations, the area of saline-alkali soil worldwide is 9.5438 hundred million hectares, wherein China is 9913 ten thousand hectares. Taking the inner Mongolian autonomous region as an example, 1585.3 ten thousand mu of the existing salinized lands of the inner Mongolia account for 11.4% of the total cultivated land area of the whole region, and the salinization of the cultivated lands becomes a prominent problem affecting the local agricultural production, the ecological environment and the economic and social development.
At present, four main techniques for improving saline-alkali soil in China are as follows: physical improvement, water conservancy improvement, chemical improvement and biological improvement, the prior art has advanced a certain improvement to the improvement of saline-alkali soil, but still has various problems. If the physical methods such as bottom sealing type foreign soil is adopted to raise the ground, the investment is large, the cost is high, and the cost is difficult to recover in a short time by agricultural planting; the water conservancy improvement mode of large water flood irrigation not only causes the waste of water resources to a great extent, but also is difficult to realize in arid and water-less areas in northwest areas; although the microbial improvement is lower in cost and better in prospect, the problem that the survival rate is lower due to the fact that strain is difficult to adapt to various climatic conditions still exists; the single chemical modification method still has the problems of high cost, difficult continuous application and the like.
Therefore, the saline-alkali soil conditioner based on the fly ash acid leached aluminum tailings is developed, and the alkaline soil conditioner is formed by matching other materials, fully utilizes the acid characteristics and the fertilizer characteristics of silicon resources for promoting the growth of crops, and has important significance for solving the problem of environmental pollution caused by the piling of the fly ash acid leached aluminum tailings and realizing the recycling of the fly ash acid leached aluminum tailings.
Disclosure of Invention
The invention aims to provide a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash and the saline-alkali soil conditioner, so as to realize the recycling of the fly ash leached aluminum tailings and solve the problems of high process cost, resource waste and unstable raw materials in the existing saline-alkali soil conditioner technology.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid, which comprises the following steps:
1) Mixing manure, municipal sludge, plant ash and crushed straw to obtain a mixed material;
2) Adding microorganism bacteria into the mixed material obtained in the step 1) for mixed fermentation to obtain a fermentation product;
3) Mixing the fly ash acid leached aluminum tailings with a fermentation product, and then drying to obtain the saline-alkali soil conditioner.
Preferably, the raw materials comprise the following components in parts by weight: 20-40 parts of fly ash acid leached aluminum tailings, 20-30 parts of manure, 5-25 parts of municipal sludge, 5-15 parts of plant ash, 15-30 parts of crushed straw and 0.5-5 parts of microbial bacteria.
Preferably, the fermentation time is 13-18 days, the fermentation temperature is 20-50 ℃, and the fermentation mode is aerobic fermentation.
Preferably, the microorganism is purchased from China general microbiological culture collection center (CGMCC) and contains one or more of Pediococcus pentosaceus CGMCC1.10999, bacillus licheniformis CGMCC1.10314 and corynebacterium glutamicum CGMCC 1.15647.
Preferably, the granularity of the crushed straw is 1.0-4.5 cm.
Preferably, the manure comprises one or more of sheep manure, cow manure, pig manure or poultry manure.
Preferably, the straw is one or more of corn straw, wheat straw, beanstalk or jowar straw.
Preferably, the moisture content of the fly ash acid leached aluminum tailings is less than or equal to 30%; the water content of the municipal sludge is less than or equal to 30 percent.
Preferably, the moisture content of the saline-alkali soil conditioner after drying is 10% -35%.
The invention also aims to provide the saline-alkali soil conditioner prepared by the method for preparing the saline-alkali soil conditioner by leaching the aluminum tailings with the fly ash acid.
Compared with the prior art, the invention has the following beneficial effects:
the raw materials for preparing the saline-alkali soil conditioner utilize the tailings after the alumina is extracted by the fly ash acid method, and the raw materials are wide in source and low in price, so that the saline-alkali soil conditioner has obvious cost advantages; the invention fully utilizes the acidic hydrogen ions in the fly ash acid leached aluminum tailings, and has remarkable neutralization and reduction effects on the characteristic of high pH value of the saline-alkali soil; the invention fully utilizes the active silicon dioxide component in the fly ash acid leached aluminum tailings, constructs a scientific balanced fertilization system of nitrogen, phosphorus, potassium and silicon in the saline-alkali soil, effectively improves the nutrients in the saline-alkali soil, improves the photosynthesis of crops, enhances the mechanical strength of crop stalks, and can reduce the occurrence of plant diseases and insect pests; the invention has simple preparation process and strong equipment reliability.
Drawings
FIG. 1 is a process flow diagram of a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid.
Detailed Description
The invention provides a method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash acid, which comprises the following steps:
1) Mixing manure, municipal sludge, plant ash and crushed straw to obtain a mixed material;
2) Adding microorganism bacteria into the mixed material obtained in the step 1) for mixed fermentation to obtain a fermentation product;
3) Mixing the fly ash acid leached aluminum tailings with a fermentation product, and then drying to obtain the saline-alkali soil conditioner.
In the invention, the raw materials are as follows in parts by weight: the addition amount of the fly ash acid leaching aluminum tailings is preferably 20-40 parts, more preferably 25-35 parts, and even more preferably 25-32 parts; the addition amount of the manure is preferably 20-30 parts, more preferably 22-28 parts, and even more preferably 22-26 parts; the addition amount of the municipal sludge is preferably 5-25 parts, more preferably 5-20 parts, and even more preferably 5-15 parts; the addition amount of the plant ash is preferably 5 to 15 parts, more preferably 5 to 14 parts, and even more preferably 6 to 13 parts; the addition amount of the crushed straw is preferably 15-30 parts, more preferably 17-28 parts, and even more preferably 20-26 parts; the amount of the microbial bacteria added is preferably 0.5 to 5 parts, more preferably 1 to 4 parts, and still more preferably 1 to 3 parts.
In the invention, the fermentation time is preferably 13-18 days, more preferably 14-17 days, and even more preferably 15-16 days; the fermentation temperature is preferably 20-50 ℃, more preferably 25-45 ℃, and even more preferably 30-40 ℃; the fermentation mode is preferably aerobic fermentation.
In the invention, the microorganism is purchased from China general microbiological culture collection center and comprises one or more of pediococcus pentosaceus CGMCC1.10999, bacillus licheniformis CGMCC1.10314 and corynebacterium glutamicum CGMCC 1.15647.
In the invention, the granularity of the crushed straw is preferably 1.0-4.5 cm, more preferably 1.5-4 cm, and even more preferably 2-3 cm.
In the present invention, the manure comprises one or more of sheep manure, cow manure, pig manure or poultry manure.
In the invention, the straw is one or more of corn straw, wheat straw, beanstalk or sorghum straw.
In the invention, the fly ash acid leached aluminum tailings comprise tailings after the fly ash is leached to prepare aluminum products by a hydrochloric acid method or a sulfuric acid method; the aluminum product comprises polyaluminum chloride, aluminum hydroxide, or aluminum oxide.
In the invention, the moisture content of the fly ash acid leached aluminum tailings is preferably less than or equal to 30%, more preferably less than or equal to 25%, and even more preferably less than or equal to 20%; the pH value of the leaching solution of the fly ash acid leaching aluminum tailings is preferably 3-5, more preferably 3.2-4.5, and even more preferably 3.4-3.2;
the water content of the municipal sludge is preferably not more than 30%, more preferably not more than 25%, and even more preferably not more than 20%.
In the invention, the moisture content of the saline-alkali soil conditioner after drying is preferably 10% -35%, more preferably 10% -30%, and even more preferably 15% -25%.
The invention also aims to provide the saline-alkali soil conditioner prepared by the method for preparing the saline-alkali soil conditioner by leaching the aluminum tailings with the fly ash acid.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The test compositions of the fly ash acid leached aluminum tailings after preparing polyaluminium chloride by sulfuric acid leaching of certain enterprises used in example 1 are shown in table 1:
TABLE 1 example 1 fly ash acid leached aluminum tailings test compositions
| Composition of the components | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | TiO 2 | LOI* | Others |
| Content/% | 81.23 | 6.58 | 0.34 | 0.24 | 1.70 | 7.81 | 2.10 |
* LOI: loss on ignition
(1) Uniformly stirring and mixing cow dung, municipal sludge (the water content is 5%), plant ash and crushed mixed straw (the mass ratio of corn straw to wheat straw is 1:1 and the granularity is 1-2 cm.) according to the addition amount of 25kg, 14kg, 15kg and 25 kg;
(2) Adding 0.5kg Pediococcus pentosaceus and 0.5kg Bacillus licheniformis, mixing, and performing aerobic fermentation (fermentation time is 13 days, fermentation temperature is 45 ℃) to obtain fermentation product;
(3) And (3) stirring the fly ash acid leached aluminum tailings (the moisture content is 30%, the pH value of the leaching solution is 3.5) obtained after leaching the polyaluminium chloride by a sulfuric acid method of 20kg with a fermentation product, uniformly mixing and drying to obtain a saline-alkali soil conditioner product (the moisture content is 20%).
Example 2
The test components of the fly ash acid leached aluminum tailings after preparing aluminum oxide by hydrochloric acid leaching of certain enterprises used in example 2 are shown in table 2:
TABLE 2 example 2 fly ash acid leached aluminum tailings test compositions
| Composition of the components | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | TiO 2 | LOI* | Others |
| Content/% | 82.36 | 5.74 | 0.64 | 0.35 | 1.50 | 7.23 | 2.18 |
* LOI: loss on ignition
(1) Uniformly stirring and mixing a mixed fertilizer with the mass ratio of cow dung to sheep manure of 1:1, municipal sludge (with the water content of 15%), plant ash and crushed mixed straw (the mass ratio of corn straw to wheat straw to beanstalk of 5:3:2 and the granularity of 2-3 cm) according to the addition amount of 25kg, 15kg, 12kg and 20.5 kg;
(2) Adding 1.5kg Pediococcus pentosaceus, mixing, and performing aerobic fermentation (fermentation time is 15 days and fermentation temperature is 35 ℃) to obtain fermentation product;
(3) And (3) stirring the fly ash acid leached aluminum tailings (the moisture content is 15 percent and the pH value of the leaching solution is 4.5) obtained after the alumina is prepared by leaching 26kg of the fly ash acid by a hydrochloric acid method with a fermentation product, uniformly mixing and drying to obtain a saline-alkali soil conditioner product (the moisture content is 18 percent).
Example 3
Example 3 the components of the fly ash acid leached aluminum tailings after alumina preparation by sulfuric acid leaching in certain enterprises used in example 3 are shown in table 3:
TABLE 3 example 3 fly ash acid leached aluminum tailings test compositions
| Composition of the components | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | TiO 2 | LOI* | Others |
| Content/% | 78.58 | 8.18 | 0.82 | 0.45 | 1.65 | 6.62 | 3.70 |
* LOI: loss on ignition
(1) Uniformly stirring and mixing a mixed fertilizer with the mass ratio of pig manure to cow manure being 1:1, municipal sludge (the water content is 30%), plant ash and crushed mixed straw (the mass ratio of corn straw to beanstalk is 1:1 and the granularity is 3-4.5 cm) according to the addition amount of 20kg, 15kg, 10kg and 23 kg;
(2) Adding 1.5kg of bacillus licheniformis CGMCC1.10314 bacteria and 0.5kg of corynebacterium glutamicum CGMCC1.15647, mixing, and performing aerobic fermentation (fermentation time is 18 days and fermentation temperature is 25 ℃), to obtain a fermentation product;
(3) And (3) stirring 30kg of fly ash acid leached aluminum tailings (the moisture content is 5%, the pH value of the leaching solution is 3.7) obtained after leaching aluminum oxide by a sulfuric acid method with a fermentation product, uniformly mixing and drying to obtain a saline-alkali soil conditioner product (the moisture content is 17%).
Example 4
Example 4 the test components of the fly ash acid leached aluminum tailings after preparing aluminum hydroxide by hydrochloric acid leaching in certain enterprises are shown in table 4:
TABLE 4 example 4 fly ash acid leached aluminum tailings test compositions
| Composition of the components | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | TiO 2 | LOI* | Others |
| Content/% | 85.42 | 5.31 | 0.34 | 0.67 | 1.29 | 5.78 | 1.19 |
* LOI: loss on ignition
(1) Uniformly stirring and mixing a mixed fertilizer, municipal sludge (the water content is 20%), plant ash and crushed mixed straw (the mass ratio of corn straw to sorghum straw is 1:1 and the granularity is 1-3 cm) with the mass ratio of pig manure to sheep manure to livestock manure being 2:1:1 according to the addition amount of 30kg, 5kg and 15 kg;
(2) Adding 3kg of bacillus licheniformis CGMCC1.10314 bacteria and 2.0kg of corynebacterium glutamicum CGMCC1.15647, mixing, and performing aerobic fermentation (the fermentation time is 16 days and the fermentation temperature is 30 ℃), thereby obtaining a fermentation product;
(3) And (3) stirring the fly ash acid leached aluminum tailings (the water content is 25 percent, the pH value of the leaching solution is 3) obtained after leaching aluminum hydroxide by a hydrochloric acid method of 40kg with a fermentation product, uniformly mixing and drying to obtain a saline-alkali soil conditioner product (the water content is 15 percent).
The test result of the soil of a certain saline-alkali soil of the inner Mongolia autonomous region is as follows: the total salt content was 0.87%, the pH value was 8.83, the effective nitrogen, phosphorus and potassium contents were 0.15%, 0.05% and 0.01%, the organic content was 13.8g/kg, the SAR value was 7.50, the above-mentioned saline-alkali soil conditioner products prepared in examples 1 to 4 were applied in an amount of 200 kg/mu, and the improvement effect was detected after 20 days as shown in Table 1.
TABLE 5 detection value Change after improvement of soil conditioner applied to saline-alkali soil of examples 1 to 4
| Total salt content/% | pH value of | Effective nitrogen/% | Available phosphorus/% | Effective potassium/% | Organic matter/g/kg | SAR value | |
| Raw soil | 0.87 | 8.83 | 0.15 | 0.05 | 0.01 | 13.8 | 7.50 |
| Example 1 | 0.53 | 8.34 | 0.25 | 0.07 | 0.03 | 19.24 | 7.13 |
| Example 2 | 0.48 | 8.11 | 0.21 | 0.06 | 0.03 | 17.35 | 6.97 |
| Example 3 | 0.41 | 7.87 | 0.24 | 0.06 | 0.03 | 18.67 | 6.72 |
| Example 4 | 0.41 | 7.82 | 0.26 | 0.07 | 0.04 | 19.34 | 6.67 |
SAR value: refers to the square root ratio of the concentration average of sodium ions to calcium ions and magnesium ions in the soil solution.
The saline-alkali soil conditioner prepared by the method has the characteristics of wide raw material sources, low raw material price, low preparation cost and sufficient nutrients, and the detection data show that the saline-alkali soil conditioner can effectively reduce the pH value and the salinity of the saline-alkali soil and greatly improve the soil fertilizer efficiency, and the method has simple process steps, effectively absorbs the byproduct of extracting aluminum oxide by using the fly ash of acid leached aluminum tailings, and realizes the recycling of solid waste.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The method for preparing the saline-alkali soil conditioner by leaching the aluminum tailings with the fly ash acid is characterized by comprising the following steps:
1) Mixing manure, municipal sludge, plant ash and crushed straw to obtain a mixed material;
2) Adding microorganism bacteria into the mixed material obtained in the step 1) for mixed fermentation to obtain a fermentation product;
3) Mixing fly ash acid leached aluminum tailings with a fermentation product, and then drying to obtain a saline-alkali soil conditioner;
the raw materials comprise the following components in parts by weight: 20-40 parts of fly ash acid leached aluminum tailings, 20-30 parts of manure, 5-25 parts of municipal sludge, 5-15 parts of plant ash, 15-30 parts of crushed straw and 0.5-5 parts of microorganism bacteria;
the pH value of the leaching solution of the fly ash acid leaching aluminum tailings is 3-5.
2. The method for preparing the saline-alkali soil conditioner by leaching the aluminum tailings with the fly ash acid according to claim 1, wherein the fermentation time is 13-18 days, the fermentation temperature is 20-50 ℃, and the fermentation mode is aerobic fermentation.
3. The method for preparing the saline-alkali soil conditioner by leaching the aluminum tailings with the fly ash acid according to claim 2, wherein the microorganism is purchased from China general microbiological culture collection center and comprises one or more of pediococcus pentosaceus CGMCC1.10999, bacillus licheniformis CGMCC1.10314 and corynebacterium glutamicum CGMCC 1.15647.
4. The method for preparing the saline-alkali soil conditioner by leaching aluminum tailings with fly ash according to claim 1 or 3, wherein the granularity of the crushed straw is 1.0-4.5 cm.
5. The method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash as claimed in claim 4, wherein the manure comprises one or more of sheep manure, cow manure, pig manure or poultry manure.
6. The method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash according to claim 1, 3 or 5, wherein the straw is one or more of corn straw, wheat straw, beanstalk or sorghum straw.
7. The method for preparing a saline-alkali soil conditioner by leaching aluminum tailings with fly ash according to claim 6, wherein the moisture content of the fly ash leached aluminum tailings is less than or equal to 30%; the water content of the municipal sludge is less than or equal to 30 percent.
8. The method for preparing the saline-alkali soil conditioner by leaching aluminum tailings with fly ash according to claim 1, 3, 5 or 7, wherein the moisture content of the saline-alkali soil conditioner after drying is 10-35%.
9. The saline-alkali soil conditioner prepared by the method for preparing the saline-alkali soil conditioner by leaching aluminum tailings with fly ash according to any one of claims 1-8.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH682561A5 (en) * | 1990-09-03 | 1993-10-15 | Holderbank Financ Glarus | Tectoaluminosilicate cement, obtained therefrom binder matrix, and concrete with this binder matrix. |
| CN101780374A (en) * | 2010-04-01 | 2010-07-21 | 史汉祥 | Synchronized dust removal and desulfuration for smoke of coal-fired boiler and comprehensive utilization of flyash of coal-fired boiler |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH682561A5 (en) * | 1990-09-03 | 1993-10-15 | Holderbank Financ Glarus | Tectoaluminosilicate cement, obtained therefrom binder matrix, and concrete with this binder matrix. |
| CN101780374A (en) * | 2010-04-01 | 2010-07-21 | 史汉祥 | Synchronized dust removal and desulfuration for smoke of coal-fired boiler and comprehensive utilization of flyash of coal-fired boiler |
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| Title |
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| 望亭发电厂: "《电厂粉煤灰的综合利用》", 水利电力出版社, pages: 32 - 37 * |
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