CN114163279A - Magnesium fertilizer prepared from magnesite and preparation method thereof - Google Patents
Magnesium fertilizer prepared from magnesite and preparation method thereof Download PDFInfo
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- CN114163279A CN114163279A CN202111673834.5A CN202111673834A CN114163279A CN 114163279 A CN114163279 A CN 114163279A CN 202111673834 A CN202111673834 A CN 202111673834A CN 114163279 A CN114163279 A CN 114163279A
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- magnesium
- magnesite
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000011777 magnesium Substances 0.000 title claims abstract description 92
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 92
- 239000003337 fertilizer Substances 0.000 title claims abstract description 55
- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 54
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 54
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 54
- 235000014380 magnesium carbonate Nutrition 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 239000002253 acid Substances 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 24
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 19
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 19
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 12
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 23
- 239000000047 product Substances 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 9
- 229920000881 Modified starch Polymers 0.000 claims description 8
- 239000004368 Modified starch Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 235000019426 modified starch Nutrition 0.000 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 30
- 238000011282 treatment Methods 0.000 description 20
- 238000012360 testing method Methods 0.000 description 18
- 230000004720 fertilization Effects 0.000 description 14
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 235000013311 vegetables Nutrition 0.000 description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 4
- 241000109294 Rosa suffulta Species 0.000 description 4
- 229910001425 magnesium ion Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229930002875 chlorophyll Natural products 0.000 description 3
- 235000019804 chlorophyll Nutrition 0.000 description 3
- 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 3
- 230000012010 growth Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 240000007124 Brassica oleracea Species 0.000 description 2
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 2
- 235000011301 Brassica oleracea var capitata Nutrition 0.000 description 2
- 235000001169 Brassica oleracea var oleracea Nutrition 0.000 description 2
- 235000010149 Brassica rapa subsp chinensis Nutrition 0.000 description 2
- 235000000536 Brassica rapa subsp pekinensis Nutrition 0.000 description 2
- 241000499436 Brassica rapa subsp. pekinensis Species 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 244000088415 Raphanus sativus Species 0.000 description 2
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000014634 leaf senescence Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000010152 pollination Effects 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000002407 ATP formation Effects 0.000 description 1
- 241001557517 Crocanthemum scoparium Species 0.000 description 1
- 108020005199 Dehydrogenases Proteins 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 208000008167 Magnesium Deficiency Diseases 0.000 description 1
- 102000011931 Nucleoproteins Human genes 0.000 description 1
- 108010061100 Nucleoproteins Proteins 0.000 description 1
- 102000012288 Phosphopyruvate Hydratase Human genes 0.000 description 1
- 108010022181 Phosphopyruvate Hydratase Proteins 0.000 description 1
- 102000009097 Phosphorylases Human genes 0.000 description 1
- 108010073135 Phosphorylases Proteins 0.000 description 1
- 102000001253 Protein Kinase Human genes 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002552 dosage form Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 230000034659 glycolysis Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000004764 magnesium deficiency Nutrition 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 108060006633 protein kinase Proteins 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000004102 tricarboxylic acid cycle Effects 0.000 description 1
- 239000004562 water dispersible granule Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C5/00—Fertilisers containing other nitrates
-
- 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
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- 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
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of fertilizers, and particularly provides a magnesium fertilizer prepared from magnesite and a preparation method thereof, wherein the magnesium fertilizer comprises the following raw materials: 75-80%, 2.0-4.0% of dispersant, 0.4-2.0% of binder and the balance of water; the preparation method of the raw material A comprises the following steps: calcining magnesite to prepare active light-burned magnesium, crushing the active light-burned magnesium, adding water to perform an exothermic reaction, adding mixed acid after the reaction is performed for a period of time, wherein the mixed acid contains sulfuric acid and nitric acid, and reacting for a certain period of time to obtain a raw material A. The invention directly utilizes the magnesium ore powder to prepare the magnesium fertilizer containing magnesium hydroxide, magnesium sulfate and magnesium nitrate, simplifies the process flow, reduces the process cost and improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of fertilizers, and particularly provides a magnesium fertilizer prepared from magnesite and a preparation method thereof, which can adjust the pH value of soil and promote the absorption and utilization rate of crops on magnesium and phosphorus.
Background
The proportion of cultivated land with magnesium deficiency (the exchange magnesium content is less than 25mg/kg) in the soil in China is reported to reach 36 percent, and the cultivated land is mainly concentrated in the south of Yangtze river and has very large area. Magnesium in soil originally comes from weathering of magnesium-containing minerals in soil, and the storage capacity of contained magnesium elements is different due to different parent substances of the soil. Southern soil mainly develops from granite, red sandstone and quaternary red clay, and has low magnesium content. Particularly, in acid soil in the south, the activity of cations in the soil is very high, and magnesium ions entering the soil are easy to leach and lose under the rainy condition.
Magnesium is a medium nutrient element required for normal growth and development of plants, is a main mineral element forming chlorophyll, directly influences photosynthesis of plants and synthesis of sugar and protein, and brings irreparable harm to plant growth due to the lack of magnesium.
As the agriculture in China develops rapidly, the yield of grains and other crops increases every year, a large amount of nutrients are absorbed from soil, and the application of the magnesium element fertilizer can improve the soil, correct the acidity of the soil, improve the soil basicity, promote the decomposition of organic fertilizers and inhibit soil germs. Is beneficial to the yield increase of crops. Therefore, it is urgent to supplement magnesium.
Disclosure of Invention
In order to solve the technical problems, the invention provides a magnesium fertilizer prepared from magnesite and a preparation method thereof, which can supplement magnesium element lost in soil, improve the soil and correct the acidity of the soil, thereby meeting the requirement of crop growth.
The invention is realized in such a way, and provides a magnesium fertilizer prepared by using magnesite, which comprises the following raw materials:
raw material A: 75-80%, 2.0-4.0% of dispersant, 0.4-2.0% of binder and the balance of water;
the preparation method of the raw material A comprises the following steps:
weighing certain mass of magnesite, calcining the magnesite to prepare active light-burned magnesium, crushing the active light-burned magnesium, adding water to perform an exothermic reaction, adding mixed acid after the reaction is performed for a period of time, wherein the mixed acid contains sulfuric acid and nitric acid, and obtaining a raw material A after the reaction is performed for a period of time, and the raw material A contains a certain amount of magnesium hydroxide, a certain amount of magnesium sulfate and a certain amount of magnesium nitrate.
Preferably, in the preparation process of starting material a:
the content of magnesium hydroxide in the active light-burned magnesium is more than or equal to 62 percent, the active light-burned magnesium is crushed to be more than 500 meshes, mixed acid with the mass of 10 percent of the active light-burned magnesium is added for carrying out exothermic reaction for 30min, the molar ratio of sulfuric acid to nitric acid in the mixed acid is 1:2, the mixed acid is added for carrying out reaction for 30min, and a raw material A is obtained, wherein the content of the magnesium hydroxide in the raw material A is more than or equal to 30 percent, the content of magnesium sulfate is more than or equal to 15 percent, and the content of the magnesium nitrate is more than or equal to 18 percent.
Further preferably, the dispersant is MSD-511; the binder is modified starch.
The invention also provides a method for preparing magnesium fertilizer by using magnesite, which comprises the following steps:
1) weighing magnesite with a certain mass, calcining the magnesite to prepare active light-burned magnesium, crushing the active light-burned magnesium, adding water to carry out an exothermic reaction, adding mixed acid after the reaction is carried out for a period of time, wherein the mixed acid contains sulfuric acid and nitric acid, and after the reaction is carried out for a certain period of time, an obtained product is marked as a raw material A, and the raw material A contains a certain amount of magnesium hydroxide, a certain amount of magnesium sulfate and a certain amount of magnesium nitrate;
2) adding a dispersing agent and a binder into the raw material A in proportion, uniformly mixing, adding water, and continuously uniformly mixing;
3) and preparing the mixed materials into different formulations according to requirements to obtain the magnesium fertilizer prepared from the magnesite.
Preferably, in the step 1), the content of magnesium hydroxide in the active light-burned magnesium is greater than or equal to 62%, the active light-burned magnesium is crushed to be more than 500 meshes, water with the mass of 10% of that of the active light-burned magnesium is added for carrying out an exothermic reaction for 30min, the molar ratio of sulfuric acid to nitric acid in the mixed acid is 1:2, the mixed acid is added for carrying out a reaction for 30min, so as to obtain a raw material A, wherein the content of magnesium hydroxide in the raw material A is greater than or equal to 30%, the content of magnesium sulfate is greater than or equal to 15%, and the content of magnesium nitrate is greater than or equal to 18%.
More preferably, in the step 2), the dispersant is MSD-511, and the binder is modified starch.
Further preferably, the step 3) includes:
3-1) conveying the mixed material in the step 2) to a disc feeder;
3-2) uniformly feeding the materials in the disc feeding machine into an extrusion granulator, and extruding the materials into slices;
3-3) crushing the extruded thin slices into fragments by a coarse crusher, then screening, and continuously crushing and screening the materials on the screen;
3-4) conveying the undersize semi-finished product to a finished product screening machine, directly returning screened fine particles to the disc feeding machine to be mixed with the next batch of materials, and granulating again;
3-5) conveying the screened qualified material products to a full-automatic packaging machine for packaging and warehousing.
Compared with the prior art, the invention has the advantages that:
1. in the magnesium fertilizer prepared by using magnesite, magnesium hydroxide regulates the soil environment of crops and improves the acid-base balance of soil.
2. In the magnesium fertilizer prepared by using magnesite, magnesium sulfate and magnesium nitrate enter soil to present an ionic state, and are easy to be absorbed by crops. Promoting the formation of chlorophyll, phytochrome and pectin, and playing an important role in maintaining the normal structure and stability of cells.
3. The magnesium fertilizer prepared by the magnesite can obviously improve the leaf green SPAD value of crops, and the improvement of the leaf green SPAD value of the crops can strengthen roots and increase green of the crops, improve the number and quality of effective tillers, lay a material foundation for yield, provide nutrition guarantee for young ear differentiation, delay leaf senescence, improve pollination rate, increase maturing rate and ensure grouting plumpness.
4. Magnesium is an activator of many enzymes that can promote phosphorus assimilation, and magnesium activation is required for almost all phosphorylases, kinases, certain dehydrogenases and enolases. The application of magnesium fertilizer prepared from magnesite can promote glycolysis, tricarboxylic acid cycle and ATP synthesis, thereby regulating respiration, energy and metabolism of other substances.
5. Magnesium is involved in the synthesis of carbohydrates, fats, proteins and nucleic acids. The application of the magnesium fertilizer prepared by using magnesite can improve the oil content of the soybean and play an important role in stabilizing the nucleoprotein particles.
6. The magnesium fertilizer prepared by using the magnesite has good flowing property, convenient application, no dust flying and environment-friendly property.
7. The magnesium fertilizer prepared by magnesite is automatically disintegrated and dispersed into suspension after being put into water, and the magnesium fertilizer has the characteristics of good dispersibility, high suspension rate, good stability, convenient use and the like.
8. The magnesium fertilizer prepared by magnesite is directly applied to soil for fertilization, absorbs soil moisture and slowly disintegrates to gradually release magnesium ions.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples 1,
The magnesium fertilizer prepared by using the magnesite comprises a raw material A80g and a dispersant MSD-5111.5 g; 1.5g of binder (modified starch) and 17g of water.
The method for preparing the fertilizer comprises the following steps:
1) weighing certain mass of magnesite, calcining the magnesite to prepare active light-burned magnesium, wherein the content of magnesium hydroxide in the active light-burned magnesium is more than or equal to 62 percent, impurities are generally calcium carbonate, silicon dioxide and the like, crushing the active light-burned magnesium to more than 500 meshes, adding water accounting for 10 percent of the mass of the active light-burned magnesium to perform exothermic reaction for 30min, adding mixed acid after the reaction, wherein the mixed acid contains sulfuric acid and nitric acid, the molar ratio of the sulfuric acid to the nitric acid is 1:2, and after the reaction for 30min, marking the obtained product as a raw material A, wherein the amount of magnesium hydroxide in the raw material A is more than or equal to 30 percent, the amount of magnesium sulfate is more than or equal to 15 percent, and the amount of magnesium nitrate is more than or equal to 18 percent;
the active light-burned magnesium can be produced by using magnesite or can be directly purchased.
When the content of magnesium hydroxide in the active light-burned magnesium is more than or equal to 62 percent, the quantitatively added mixed acid (sulfuric acid and nitric acid) reacts with the magnesium hydroxide to generate magnesium sulfate with the concentration of more than 15 percent, magnesium nitrate with the concentration of more than 18 percent and magnesium hydroxide with the concentration of more than 30 percent.
2) Putting the raw material A into a mixing stirrer, starting the mixing stirrer to stir for 30-40 min, adding a dispersing agent and a binder into the raw material A in proportion, uniformly mixing, adding water, and continuously mixing and stirring for 20-30 min to be uniform;
3) the mixed materials are prepared into different dosage forms according to requirements to obtain the magnesium fertilizer prepared from the magnesite, and specifically, in the embodiment, the magnesium fertilizer is prepared into granules:
3-1) conveying the mixed material in the step 2) to a disc feeder;
3-2) uniformly feeding the materials in the disc feeding machine into an extrusion granulator, and extruding the materials into slices;
3-3) crushing the extruded thin slices into fragments by a coarse crusher, then screening, and continuously crushing and screening the materials on the screen;
3-4) conveying the undersize semi-finished product to a finished product screening machine, directly returning screened fine particles to the disc feeding machine to be mixed with the next batch of materials, and granulating again;
3-5) conveying the screened qualified material products to a full-automatic packaging machine for packaging and warehousing.
The raw materials used in the invention can be purchased from raw material markets. Raw material A (treated light burned magnesium) can be purchased from Liaoning magnesite mining Co., Ltd; the high-efficiency dispersant MSD-511 is produced by Liaoning Meilong Co Ltd; the modified starch is an industrial grade raw material purchased in the market; the water is deionized water which is self-made by a factory.
Examples 2,
The difference from example 1 is that:
the magnesium fertilizer prepared by using the magnesite comprises a raw material A75g and a dispersant MSD-5112 g; 1g of binder (modified starch) and 22g of water.
Examples 3,
The difference from example 1 is that:
the magnesium fertilizer prepared by using the magnesite comprises a raw material A80g and a dispersant MSD-5113 g; 0.5g of binder (modified starch) and 16.5g of water.
The products prepared in example 1, example 2 and example 3 were examined, and the results are shown in the following table, in which the dispersibility was good and the particles reached the nanometer level.
| Serial number | Appearance of the product | Self-dispersing | Suspension rate/% |
| Example 1 | Granular form | The particles fall into water along with the falling of the particles and are dispersed after soaking | 95.6 |
| Example 2 | Granular form | The particles enter water and automatically disperse in the descending process | 99.0 |
| Example 3 | Granular form | The particles enter water and automatically disperse in the descending process | 99.3 |
Example 4 Effect of magnesium fertilizers prepared from magnesite on pH of soil
Firstly, test treatment:
(1) setting 2 treatments without repetition, determining the size of each treatment area according to the vegetable garden area of each test farmer, wherein the area of the treatment 1 is not less than 667m2Control treatment 2 area of not less than 333m2。
(2) ToPrinciple 1: conventional fertilization plus 10kg/667m magnesium fertilizer prepared by magnesite2(recommended amount);
(3) and (3) treatment 2: conventional fertilization (CK), the amount used was determined at moderate fertilization levels in the area of the test site.
II, testing time:
a field test method is adopted for multi-point comparison in 3-10 months in 2020, and the influence of the magnesium fertilizer prepared by magnesite on the improvement effect of acid soil and the yield of cruciferous vegetables in different elevation areas of Lichuan is researched. The results are shown in Table 2:
table 2: soil pH value result change table
| Test number and location | 1 day upper terrace | 2 group together | 3 big ditch | 4 square hole | 5 Stone plate ridge | 6 Guangming | Mean value of |
| Process 1 | 4.56 | 5.16 | 4.88 | 5.36 | 5.16 | 5.56 | 5.11 |
| Process 2(CK) | 4.35 | 5.01 | 4.58 | 5.22 | 4.95 | 5.40 | 4.92 |
| 1:2 ±) | 0.21 | 0.15 | 0.30 | 0.14 | 0.21 | 0.16 | 0.20 |
| 1 to 2 ±%) | 4.83 | 2.99 | 6.55 | 2.68 | 4.24 | 2.96 | 4.04 |
The results in table 2 show that the soil pH results at 6 test points show that the soil pH can be increased by applying the magnesium fertilizer prepared from magnesite. Compared with CK, the pH value of the soil at 6 points is improved by 0.14-0.30 unit, the average improvement is 0.20, the improvement amplitude is 2.68-6.84%, and the average improvement is 4.04%.
Example 5 Effect of magnesium fertilizers prepared from magnesite on test yield
Firstly, test treatment:
(1) setting 2 treatments without repetition, determining the size of each treatment area according to the vegetable garden area of each test farmer, wherein the area of the treatment 1 is not less than 667m2Control treatment 2 area of not less than 333m2。
(2) Treatment 1: conventional fertilization plus 10kg/667m magnesium fertilizer prepared by magnesite2(recommended amount);
(3) and (3) treatment 2: conventional fertilization (CK), the amount used was determined at moderate fertilization levels in the area of the test site.
II, testing time:
in 2020, 16 days in 6 months to 23 days in 7 months, the research on the influence of 'magnesium fertilizer prepared by magnesite' on the yield of brassicaceous vegetables such as Chinese cabbage, cabbage and radish is additionally applied on the basis of conventional fertilization. The results are shown in Table 3:
table 3: statistical table of test yield results
As can be seen from the results in Table 3, the yield results of 6 test points show that the yield of brassicaceous vegetables such as Chinese cabbage, cabbage and radish can be increased by additionally applying the magnesium fertilizer prepared by magnesite on the basis of conventional fertilization, and each 667m of the yield results show that2The yield of the fertilizer is 462-1371 kg higher than that of CK, and is 789kg/667m2 on average; the amplification is between 8.14 and 29.24 percent, and the average amplification is 17.30 percent.
Example 6 influence of magnesium fertilizer prepared from magnesite on the Green SPAD value of test leaves
Firstly, test treatment:
(1) 2 varieties are set in Yunnan province for treatment, and 2 varieties are selected according to the current tree age condition of farmers, wherein each variety has 3 tree ages.
(2) Treatment 1: conventional fertilization plus 250g/667m magnesium fertilizer prepared by magnesite2(recommended amount);
(3) and (3) treatment 2: conventional fertilization (CK), the amount used was determined at moderate fertilization levels in the area of the test site.
II, testing time:
in 2020, 16 days in 6 months to 23 days in 7 months, the influence of research on the green SPAD value of summer black and sun rose leaves by 'magnesium fertilizer prepared by magnesite' is additionally applied on the basis of conventional fertilization. The results are shown in Table 4:
TABLE 4 chlorophyll SPAD value detection comparison
| Variety of (IV) C | Age of tree | Control | Treatment of alkaline magnesium fertilizer 1 | Alkaline magnesium fertilizer treatment 2 | Alkaline magnesium fertilizer treatment 3 | Mean value of |
| Summer black | 8 years old | 33.90 | 38.87 | 38.77 | 39.42 | 39.02 |
| Summer black | 7 years old | 34.77 | 41.85 | 40.97 | 40.94 | 41.25 |
| Summer black | 6 years old | 34.47 | 40.29 | 40.63 | 41.20 | 40.70 |
| Sunshine rose | 1 year | 25.35 | 31.57 | 29.72 | 29.67 | 30.32 |
| Sunshine rose | 6 years old | 22.67 | 30.05 | 30.65 | 31.16 | 30.62 |
| Sunshine rose | 7 years old | 27.40 | 35.25 | 33.02 | 32.96 | 33.74 |
The results in table 4 show that the yield results of 6 test points of water construction in Yunnan province show that the application of the magnesium fertilizer prepared by magnesite on the basis of conventional fertilization can improve the SPAD value of summer black and sunshine rose leaves.
In conclusion, the magnesium fertilizer prepared by the magnesite can adjust the soil acid-base environment, release magnesium ions through the slow release effect of the water dispersible granules, meet the needs of crop growth, avoid the loss of the magnesium ions when the conventional fertilizer is applied to the soil at one time, and increase the green SPAD value of crop leaves, so that the roots of the crops are strengthened and the green color is increased, the effective tillering quantity and quality are improved, a material foundation is laid for the yield, a nutrition guarantee is provided for the young ear differentiation, the leaf senescence is delayed, the pollination rate is improved, the maturing rate is increased, and the grouting plumpness is ensured.
Claims (7)
1. The magnesium fertilizer prepared from the magnesite is characterized by comprising the following raw materials:
raw material A: 75-80%, 2.0-4.0% of dispersant, 0.4-2.0% of binder and the balance of water;
the preparation method of the raw material A comprises the following steps:
weighing certain mass of magnesite, calcining the magnesite to prepare active light-burned magnesium, crushing the active light-burned magnesium, adding water to perform an exothermic reaction, adding mixed acid after the reaction is performed for a period of time, wherein the mixed acid contains sulfuric acid and nitric acid, and obtaining a raw material A after the reaction is performed for a period of time, and the raw material A contains a certain amount of magnesium hydroxide, a certain amount of magnesium sulfate and a certain amount of magnesium nitrate.
2. The magnesium fertilizer prepared by using magnesite according to claim 1, wherein in the preparation method of the raw material A:
the content of magnesium hydroxide in the active light-burned magnesium is more than or equal to 62 percent, the active light-burned magnesium is crushed to be more than 500 meshes, mixed acid with the mass of 10 percent of the active light-burned magnesium is added for carrying out exothermic reaction for 30min, the molar ratio of sulfuric acid to nitric acid in the mixed acid is 1:2, the mixed acid is added for carrying out reaction for 30min, and a raw material A is obtained, wherein the content of the magnesium hydroxide in the raw material A is more than or equal to 30 percent, the content of magnesium sulfate is more than or equal to 15 percent, and the content of the magnesium nitrate is more than or equal to 18 percent.
3. The magnesium fertilizer prepared by using magnesite according to claim 1, wherein the dispersant is MSD-511; the binder is modified starch.
4. The method for preparing the magnesium fertilizer by using the magnesite is characterized by comprising the following steps:
1) weighing magnesite with a certain mass, calcining the magnesite to prepare active light-burned magnesium, crushing the active light-burned magnesium, adding water to carry out an exothermic reaction, adding mixed acid after the reaction is carried out for a period of time, wherein the mixed acid contains sulfuric acid and nitric acid, and after the reaction is carried out for a certain period of time, an obtained product is marked as a raw material A, and the raw material A contains a certain amount of magnesium hydroxide, a certain amount of magnesium sulfate and a certain amount of magnesium nitrate;
2) adding a dispersing agent and a binder into the raw material A in proportion, uniformly mixing, adding water, and continuously uniformly mixing;
3) and preparing the mixed materials into different formulations according to requirements to obtain the magnesium fertilizer prepared from the magnesite.
5. The method for preparing the magnesium fertilizer by using the magnesite as claimed in claim 4, wherein in the step 1), the content of the magnesium hydroxide in the active light burned magnesium is greater than or equal to 62%, the active light burned magnesium is crushed to be more than 500 meshes, water with the mass of 10% of that of the active light burned magnesium is added to perform an exothermic reaction for 30min, the molar ratio of sulfuric acid to nitric acid in the mixed acid is 1:2, the mixed acid is added to perform a reaction for 30min, so as to obtain the raw material A, and the amount of the magnesium hydroxide, the magnesium sulfate and the magnesium nitrate in the raw material A are greater than or equal to 30%, greater than or equal to 15% and greater than or equal to 18%.
6. The method for preparing the magnesium fertilizer by using the magnesite as claimed in claim 4, wherein in the step 2), the dispersant is MSD-511, and the binder is modified starch.
7. The method for preparing the magnesium fertilizer by using the magnesite according to claim 4, wherein the step 3) comprises the following steps:
3-1) conveying the mixed material in the step 2) to a disc feeder;
3-2) uniformly feeding the materials in the disc feeding machine into an extrusion granulator, and extruding the materials into slices;
3-3) crushing the extruded thin slices into fragments by a coarse crusher, then screening, and continuously crushing and screening the materials on the screen;
3-4) conveying the undersize semi-finished product to a finished product screening machine, directly returning screened fine particles to the disc feeding machine to be mixed with the next batch of materials, and granulating again;
3-5) conveying the screened qualified material products to a full-automatic packaging machine for packaging and warehousing.
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