CN109504399B - Multifunctional magnesium-deficiency soil conditioner and preparation process, use method and application thereof - Google Patents
Multifunctional magnesium-deficiency soil conditioner and preparation process, use method and application thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003516 soil conditioner Substances 0.000 title claims abstract description 29
- 208000008167 Magnesium Deficiency Diseases 0.000 title claims abstract description 22
- 235000004764 magnesium deficiency Nutrition 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000011777 magnesium Substances 0.000 claims abstract description 99
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 99
- 239000000843 powder Substances 0.000 claims abstract description 58
- 239000002699 waste material Substances 0.000 claims abstract description 52
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 46
- 230000023556 desulfurization Effects 0.000 claims abstract description 46
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000010459 dolomite Substances 0.000 claims abstract description 12
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 11
- 239000011575 calcium Substances 0.000 claims abstract description 11
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 11
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010457 zeolite Substances 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 9
- 239000011593 sulfur Substances 0.000 claims abstract description 9
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004021 humic acid Substances 0.000 claims abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 235000010755 mineral Nutrition 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000011573 trace mineral Substances 0.000 claims abstract description 7
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims description 40
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 34
- 239000000395 magnesium oxide Substances 0.000 claims description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 20
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 17
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 claims description 9
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000006227 byproduct Substances 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 31
- 239000003337 fertilizer Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 239000013589 supplement Substances 0.000 abstract description 7
- 230000012010 growth Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000001737 promoting effect Effects 0.000 abstract description 5
- 230000001502 supplementing effect Effects 0.000 abstract description 5
- 239000002688 soil aggregate Substances 0.000 abstract description 4
- 230000002950 deficient Effects 0.000 description 11
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 6
- 239000001095 magnesium carbonate Substances 0.000 description 4
- 235000014380 magnesium carbonate Nutrition 0.000 description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229930002875 chlorophyll Natural products 0.000 description 1
- 235000019804 chlorophyll Nutrition 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 dolomite Chemical compound 0.000 description 1
- 244000037666 field crops Species 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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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
- C09K2101/00—Agricultural use
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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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Inorganic Chemistry (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a multifunctional magnesium-deficiency soil conditioner which comprises the following raw materials in parts by weight: 130-150 parts of magnesium desulfurization waste residue, 20-40 parts of silicon-magnesium powder, 30-50 parts of dolomite powder, 20-40 parts of zeolite powder and 10-20 parts of mineral humic acid. The soil conditioner can give consideration to short-term, medium-term and long-term supplement of magnesium element, meets the requirements of crops on the magnesium element and fertilizer efficiency in the whole growth period, and can be adjusted according to factors such as local climate, crop species and the like; meanwhile, the fertilizer has the effects of improving acid soil, promoting the generation of soil aggregate structures, supplementing medium and trace elements such as calcium, magnesium, sulfur, silicon and the like, and improving the quality and the yield of crops. The preparation process comprises the steps of mixing, extruding and screening, can solve the problem of magnesium desulfurization waste residue treatment in the thermoelectric industry, recycles the magnesium desulfurization waste residue after comprehensive treatment, and has the advantages of easily obtained raw materials, simple process, low cost, environmental protection, and remarkable social and economic benefits.
Description
Technical Field
The invention relates to the technical field of soil conditioners, in particular to a multifunctional magnesium-deficiency soil conditioner and a preparation process, a use method and application thereof.
Background
Magnesium is a vital element and has various irreplaceable effects on soil, plants, microorganisms and animals.
In plants, magnesium is an essential element for plant growth, and besides magnesium is known to be one of central elements for synthesizing chlorophyll, the magnesium is also involved in normal physiological metabolic processes of various plants, so that the magnesium deficiency of the plants macroscopically shows various symptoms, such as the appearance of green leaves and yellowing and even reddish purple of the leaves, and if the magnesium deficiency is serious, scald necrosis is formed, and crop death is even caused.
The magnesium absorption of plants is mainly from soil, and a part of magnesium is from trace magnesium elements dissolved in irrigation water. According to the classification index of soil available nutrients by the ASI method, the content of magnesium element in the farmland with soil quality of loam and clay is low when the content of magnesium element is less than 120ppm, and the content of magnesium element in the farmland with soil quality of sandy soil is low when the content of magnesium element is less than 50 ppm. Lands below the above values are severely deficient in magnesium. According to data, the soil with over 50% of China has magnesium deficiency in different degrees, the proportion of serious magnesium deficiency areas is over 8%, and the soil in China needs to be supplemented with millions of tons of magnesium-containing fertilizers every year according to simple judgment of the magnesium deficiency condition of the soil in China.
However, the common water-soluble magnesium-containing fertilizers, such as magnesium sulfate and magnesium nitrate, can only supplement magnesium element in a short period after application, but cannot provide magnesium element for a long time, especially in rainy areas, only a part of plants are absorbed after application, and the rest is washed away by rainwater. For water-insoluble fertilizers containing magnesium, such as dolomite, brucite, magnesite powder and the like, the dissolution in water is slow, the solubility is low, and the effect of quickly supplementing magnesium after application cannot be achieved.
The reserve of magnesium resources in China is listed at the top in the world and is an important export country of magnesium-containing fertilizers, but because of decades of development, high-grade magnesite in most regions is less and less, and even though the supply of common-grade magnesite is more and more tense due to the problem of environmental protection.
The magnesite is industrially used to calcine, wherein light-burned magnesium oxide can be obtained in one mode, and then the light-burned magnesium oxide is used as a raw material to produce the magnesium sulfate fertilizer, the magnesium sulfate is used as a main component, and the magnesium sulfate can be dissolved when meeting water after being applied to farmlands, and magnesium elements are released and absorbed by crops. However, magnesium-deficient areas are mainly concentrated in rainy areas in the south of the Yangtze river, and the absorption rate of magnesium sulfate is reduced due to the instant dissolution effect of magnesium sulfate, so that a magnesium-containing fertilizer with a slow release effect is needed.
At present, magnesium desulfurization is one of the important methods for removing sulfur dioxide from flue gas. The magnesium desulfurization process has the characteristics of high desulfurization rate, high utilization rate of the absorbent, strong unit adaptability, no scaling in the treatment process and the like, so the magnesium desulfurization process is gradually widely applied.
The magnesium desulfurization waste residue is a byproduct of flue desulfurization by using a magnesium desulfurization process in industry, most of raw materials of the desulfurization process are light-burned magnesium oxide, and components of the magnesium desulfurization waste residue are different due to differences of the raw materials, the process and the reaction, so that the components are relatively complex. The magnesium desulfurization waste residue just after the desulfurization production line is in a slurry state, and the water content is usually between 15 and 25 percent. After being dried for 5-10 days, the powder becomes hard gradually and can be crushed, and the granularity of the crushed powder is 40-100 meshes and is powdery. Through detection and analysis, the main components of the magnesium sulfate are magnesium sulfite, a certain amount of magnesium-containing substances such as magnesium hydroxide and the like, silicate, free water and crystal water.
Along with the gradual popularization of magnesium desulphurization, the amount of the generated magnesium desulphurization waste slag is more and more, most of the magnesium desulphurization waste slag cannot be effectively utilized, and the magnesium desulphurization waste slag is piled as common industrial solid waste, so that the magnesium desulphurization waste slag occupies limited industrial sites, and poses certain threat to the safety of the surrounding environment.
Disclosure of Invention
The invention aims to solve the first technical problem of providing a multifunctional magnesium-deficiency soil conditioner, which can give consideration to short-term, medium-term and long-term supplement of magnesium element aiming at magnesium-deficiency soil, meet the requirements of crops on the magnesium element and fertilizer efficiency in the whole growth period, and can be adjusted according to factors such as local climate, crop species and the like; meanwhile, the fertilizer has the effects of improving acid soil, promoting the generation of soil aggregate structures, supplementing medium and trace elements such as calcium, magnesium, sulfur, silicon and the like, and improving the quality and the yield of crops.
In order to solve the first technical problem, the invention adopts the technical scheme that:
a multifunctional magnesium-deficiency soil conditioner comprises the following raw materials in parts by weight: 130-150 parts of magnesium desulfurization waste residue, 20-40 parts of silicon-magnesium powder, 30-50 parts of dolomite powder, 20-40 parts of zeolite powder and 10-20 parts of mineral humic acid.
Wherein the total content of magnesium oxide in the magnesium desulfurization waste residue is 21 percent, and the content of water-soluble magnesium oxide is 2 percent.
Further, the magnesium desulfurization waste residue is a byproduct of flue desulfurization by using a magnesium desulfurization process industrially, the state of the magnesium desulfurization waste residue right after a desulfurization production line is slurry, and the water content is usually between 15 and 25 percent; after being dried for 5-10 days, the mixture gradually hardens to a degree of being capable of being crushed, and the granularity of the crushed mixture is 40-100 meshes.
Wherein, the silicon magnesium powder contains 10.5 percent of total magnesium oxide, 7 percent of water-soluble magnesium oxide and 13 percent of silicon dioxide.
Furthermore, the silicon magnesium powder is a powder product obtained by processing waste residues generated in magnesium sulfate heptahydrate production, and contains medium and trace elements such as silicon, calcium, magnesium, sulfur and the like.
Furthermore, the treatment method of the waste residue from the production of magnesium sulfate heptahydrate comprises the following steps: according to the mass ratio of (10-40): 100, stirring the sulfuric acid and the magnesium sulfate production waste residues in a forced stirrer, fully reacting for 30-60 minutes, discharging the materials while the materials are hot, and cooling to room temperature to obtain a yellowish-brown blocky product; and adding the earthy yellow blocky product into a Raymond mill, crushing to obtain earthy yellow powdery silicon magnesium powder, and finally packaging.
Wherein the dolomite powder contains 15 percent of total magnesium oxide and 26 percent of total calcium oxide.
Wherein, the content of silicon dioxide in the zeolite powder is 61 percent.
The second technical problem to be solved by the invention is to provide a preparation process of a multifunctional magnesium-deficiency soil conditioner, which solves the problem of magnesium desulphurization waste residue treatment in the thermoelectric industry, comprehensively treats the magnesium desulphurization waste residue, recycles the magnesium desulphurization waste residue, fuses the magnesium desulphurization waste residue and silicon magnesium powder into a product, and prepares the soil conditioner, and the preparation process has the advantages of easily available raw materials, simple process, low cost, environmental protection, and remarkable economic and social benefits.
In order to solve the second technical problem, the invention adopts the technical scheme that:
a preparation process of a multifunctional magnesium-deficiency soil conditioner comprises the following process steps:
(1) mixing: weighing the raw materials in the ratio of claim 1, and then mixing them uniformly in a blender mixer to form a powder material;
(2) extruding: granulating the mixed powder material in a double-roller extrusion granulator;
(3) screening: screening the particles, and packaging qualified products with the size of 2-5 mm; and crushing the unqualified product in the crusher and then using the crushed unqualified product for extrusion granulation again.
The third technical problem to be solved by the invention is to provide the application of the multifunctional magnesium-deficient soil conditioner, aiming at magnesium-deficient soil, the soil conditioner is used for providing magnesium element for both short-term, medium-term and long-term, improving acid soil, promoting the formation of granular soil structure, supplementing medium trace elements such as calcium, magnesium, sulfur and silicon and the like, and improving the yield and quality of agricultural products.
The fourth technical problem to be solved by the invention is to provide a use method of the multifunctional magnesium-deficiency soil conditioner, which comprises the following steps: for magnesium deficient soil, the soil conditioner is continuously applied for three years according to the consumption of 200 kg per mu, and then is applied once every 3-5 years on average.
The using method comprises the following steps: aiming at the magnesium-deficient soil, the soil conditioner can be independently and uniformly applied to the ground surface, or can be applied after being mixed with other fertilizers; and shallow trench application of 10-15 cm can be carried out.
Compared with the prior art, the invention has the following advantages and positive effects:
the invention relates to the reuse of magnesium desulphurization waste residue, namely, the industrial solid waste is processed to prepare a multifunctional magnesium-deficiency soil conditioner. Magnesium-method desulfurization waste residues contain magnesium sulfite, and after a large amount of researches on the properties of the magnesium sulfite are carried out and farmland applications are carried out, a preparation process of a multifunctional soil conditioner for magnesium-deficient soil is explored.
The process of the invention selects the magnesium desulfurization waste residue as the main raw material, fully exerts the characteristic that the magnesium desulfurization waste residue is slowly oxidized into magnesium sulfate under natural conditions, and simultaneously, is matched with and selects various raw materials with different functions to finally produce the soil conditioner which can be used for the magnesium-deficient soil.
The soil conditioner comprises magnesium desulfurization waste residue, silicon magnesium powder, dolomite powder, zeolite powder and mineral humic acid. Wherein the silicon magnesium powder is a powder product obtained by treating waste residues generated in magnesium sulfate heptahydrate production, and contains medium elements such as silicon, calcium, magnesium, sulfur and the like; the specific manufacturing method comprises the following steps: the silicon magnesium powder is a product obtained by treating waste residues generated in the production of magnesium sulfate heptahydrate; the treatment method of the waste residue in the magnesium sulfate heptahydrate production comprises the following steps: the mass ratio of (10-40): 100, stirring the sulfuric acid and the magnesium sulfate production waste residues in a forced stirrer, fully reacting for 30-60 minutes, discharging the materials while the materials are hot, and cooling to room temperature to obtain a yellowish-brown blocky product; and adding the earthy yellow blocky product into a Raymond mill, crushing to obtain earthy yellow powdery silicon magnesium powder, and finally packaging. The silicon-magnesium powder can be applied to the preparation of soil conditioners.
The soil conditioner has stronger pertinence to the magnesium-deficient soil. The zeolite has certain water absorption and retention capacity, can provide favorable conditions for the conversion of magnesium sulfite in magnesium desulfurization waste residue to magnesium sulfate, and can generally provide magnesium element for the whole growth period of crops continuously because the complete conversion of the magnesium sulfite to the magnesium sulfate generally requires several months to 1 year under natural conditions and contains partial magnesium sulfate. Meanwhile, the silicon-magnesium powder is selected, so that elements such as sulfur, magnesium and the like can be rapidly provided for early growth of crops in a short period, and the matching of the silicon-magnesium powder and mineral humic acid is favorable for promoting the generation of a soil aggregate structure. Dolomite can be completely absorbed in 2-3 years generally, calcium and magnesium elements can be provided for a long time, the balance of the calcium and magnesium proportion in soil is facilitated, and acid soil can be improved. According to experimental experience, the magnesium deficiency problem can be solved by continuously applying the product for three years in magnesium deficiency areas according to the consumption of 200 kg per mu, and then applying the product once every 3-5 years on average, so that the magnesium deficiency problem caused by simple magnesium deficiency elements can be avoided in the soil.
In summary, the five raw materials are all absent, each raw material has different functions, the short-term, medium-term and long-term supplement of the magnesium element is considered, the requirement of the crops on the magnesium element in the whole growth period is met, and the adjustment can be carried out according to factors such as local climate, crop species and the like. Meanwhile, the product also has the effects of improving acid soil, promoting the generation of soil aggregate structures and supplementing medium elements such as calcium, magnesium, sulfur, silicon and the like. In addition, the granulation is carried out according to the types and the proportions of the raw materials in the invention, no additional binder is needed, and the magnesium sulfite and the silicon magnesium powder both contain a certain amount of magnesium sulfate, so that the magnesium sulfite and the silicon magnesium powder can play a role in binding in the extrusion process.
Compared with the common water-soluble and water-insoluble magnesium-containing fertilizers on the market at present, the soil conditioner prepared by the process has obvious advantages. In terms of fertilizer efficiency, the fertilizer efficiency time of the product takes into consideration of each stage of plant growth, and the product has instant components and slow and long-term released components, can quickly supplement magnesium elements after application and can provide the magnesium elements for a long time, so the product has obvious advantages in terms of fertilizer efficiency.
The application method of the soil conditioner comprises the following steps: can be independently and uniformly spread on the ground surface or spread after being mixed with other kinds of fertilizers; the shallow trench application of 10-15 cm can also be carried out.
Through farmland tests, the soil conditioner can improve the quality and the yield of crops. For example, the soil improvement agent is applied to field crops such as wheat, corn and the like, can obviously improve the growth vigor of the crops, and has the functions of obviously improving the quality and increasing the yield under the same other conditions. In addition, after the soil conditioner is applied, the soil quality is improved, and the taste of the planted vegetables is better.
The magnesium-method desulfurization waste residue is used as a main raw material, the magnesium-method desulfurization waste residue and silicon-magnesium powder are fused into a product to prepare the magnesium-containing fertilizer with a slow release effect for magnesium-deficient soil, the two industrial solid wastes with use values are jointly developed and utilized, the respective characteristics of the two industrial solid wastes are fully exerted and utilized, the environmental protection pressure is solved, the operation pressure of related enterprises is reduced, and a certain social and economic value is created.
Drawings
FIG. 1 is a simple process flow diagram of the present invention
Detailed Description
The present invention will be described in further detail with reference to specific examples below:
example 1
(1) Mixing
130 parts of magnesium desulfurization waste residue, 20 parts of silicon-magnesium powder, 30 parts of dolomite powder, 20 parts of zeolite powder and 10 parts of mineral humic acid are weighed according to a proportion and then are uniformly mixed in a mixer.
Through detection and test verification, the total content of magnesium oxide in the magnesium desulfurization waste residue is 21%, and the content of water-soluble magnesium oxide is 2% (magnesium sulfite is oxidized into magnesium sulfate); the total content of magnesium oxide in the silicon-magnesium powder is 10.5 percent, the content of water-soluble magnesium oxide is 7 percent, and the content of silicon dioxide is 13 percent; the dolomite powder contains 15 percent of total magnesium oxide and 26 percent of total calcium oxide; the content of silicon dioxide in the zeolite powder is 61 percent.
The magnesium desulfurization waste residue is a byproduct of flue desulfurization by using a magnesium desulfurization process in industry, the state of the magnesium desulfurization waste residue just after a desulfurization production line is slurry, and the water content is usually between 15 and 25 percent; after being dried for 5-10 days, the powder becomes hard gradually and can be crushed, and the granularity of the crushed powder is 40-100 meshes and is powdery.
The silicon magnesium powder is a powder product obtained by treating waste residues generated in the production of magnesium sulfate heptahydrate, and contains medium and trace elements such as silicon, calcium, magnesium, sulfur and the like. The treatment method of the waste residue in the production of magnesium sulfate heptahydrate comprises the following steps: the mass ratio of (10-40): 100, stirring the sulfuric acid and the magnesium sulfate production waste residues in a forced stirrer, fully reacting for 30-60 minutes, discharging the materials while the materials are hot, and cooling to room temperature to obtain a yellowish-brown blocky product; and adding the earthy yellow blocky product into a Raymond mill, crushing to obtain earthy yellow powdery silicon magnesium powder, and finally packaging.
(2) Extrusion
And granulating the mixed powder material in a double-roller extrusion granulator.
(3) Sieving
Screening the particles, and packaging qualified products with the size of 2-5 mm; and crushing the unqualified product in the crusher and then using the crushed unqualified product for extrusion granulation again.
Example 2
(1) Mixing
140 parts of magnesium desulfurization waste residue, 30 parts of silicon-magnesium powder, 40 parts of dolomite powder, 30 parts of zeolite powder and 15 parts of mineral humic acid are weighed according to the proportion and then evenly mixed in a mixer.
(2) Extrusion
And granulating the mixed powder material in a double-roller extrusion granulator.
(3) Sieving
Screening the particles, and packaging qualified products with the size of 2-5 mm; and crushing the unqualified product in the crusher and then using the crushed unqualified product for extrusion granulation again.
Example 3
(1) Mixing
150 parts of magnesium desulfurization waste residue, 40 parts of silicon magnesium powder, 50 parts of dolomite powder, 40 parts of zeolite powder and 20 parts of mineral humic acid are weighed according to a proportion and then uniformly mixed in a mixer.
(2) Extrusion
And granulating the mixed powder material in a double-roller extrusion granulator.
(3) Sieving
Screening the particles, and packaging qualified products with the size of 2-5 mm; and crushing the unqualified product in the crusher and then using the crushed unqualified product for extrusion granulation again.
The results of the measurements on the samples obtained in the three examples are shown in the following table:
| name (R) | Total magnesium oxide% | Water-soluble magnesium oxide% | Total calcium oxide% | Silica% |
| Example 1 | 16.0 | 1.9 | 4.0 | 7.4 |
| Example 2 | 15.1 | 1.7 | 4.2 | 7.3 |
| Example 3 | 14.5 | 1.9 | 4.6 | 9.7 |
The soil conditioner product obtained according to the scheme of the invention has the advantages of low cost, simple process, high product practicability and long-term and slow-release effect. The method has better applicability to the soil in the magnesium-deficient area. The soil conditioner can also supplement calcium and silicon elements, and supplement medium trace elements and water and soil loss.
The process solves the problem of magnesium desulfurization waste residue treatment in the thermoelectric industry, recycles the magnesium desulfurization waste residue after comprehensive treatment, changes waste into valuable, is fused with silicon-magnesium powder into a product to prepare the soil conditioner, and has the advantages of easily available raw materials, simple process, low cost, environmental protection, and remarkable economic and social benefits.
Claims (1)
1. The multifunctional magnesium-deficiency soil conditioner is characterized by comprising the following raw materials in parts by weight: 130-150 parts of magnesium desulfurization waste residue, 20-40 parts of silicon-magnesium powder, 30-50 parts of dolomite powder, 20-40 parts of zeolite powder and 10-20 parts of mineral humic acid;
the total content of magnesium oxide in the magnesium desulfurization waste residue is 21 percent, and the content of water-soluble magnesium oxide is 2 percent; the magnesium desulfurization waste residue is a byproduct of flue desulfurization by using a magnesium desulfurization process in industry, the state of the magnesium desulfurization waste residue right after a desulfurization production line is slurry, and the water content is 15-25%; after being aired for 5-10 days, the mixture gradually hardens to reach the crushing degree, and the granularity after crushing is in the range of 40-100 meshes;
the silicon magnesium powder contains 10.5 percent of total magnesium oxide, 7 percent of water-soluble magnesium oxide and 13 percent of silicon dioxide; the silicon magnesium powder is a powder product obtained by treating waste residues generated in magnesium sulfate heptahydrate production, and contains trace elements in silicon, calcium, magnesium and sulfur; the treatment method of the waste residue in the magnesium sulfate heptahydrate production comprises the following steps: the mass ratio of (10-40): 100, stirring the sulfuric acid and the magnesium sulfate production waste residues in a forced stirrer, fully reacting for 30-60 minutes, discharging the materials while the materials are hot, and cooling to room temperature to obtain a yellowish-brown blocky product; adding the earthy yellow blocky product into a Raymond mill, crushing to obtain earthy yellow powdery silicon magnesium powder, and finally packaging;
the dolomite powder contains 15% of total magnesium oxide and 26% of total calcium oxide;
the content of silicon dioxide in the zeolite powder is 61 percent;
the preparation process of the multifunctional magnesium-deficiency soil conditioner comprises the following process steps:
(1) mixing: weighing the raw materials according to the proportion, and then uniformly mixing the raw materials in a mixer to form a powder material;
(2) extruding: granulating the mixed powder material in a double-roller extrusion granulator;
(3) screening: screening the particles, and packaging qualified products with the size of 2-5 mm; and crushing the unqualified product in the crusher and then using the crushed unqualified product for extrusion granulation again.
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