CN113354471A - Compound fertilizer for flying application and preparation method thereof - Google Patents
Compound fertilizer for flying application and preparation method thereof Download PDFInfo
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- CN113354471A CN113354471A CN202110704841.0A CN202110704841A CN113354471A CN 113354471 A CN113354471 A CN 113354471A CN 202110704841 A CN202110704841 A CN 202110704841A CN 113354471 A CN113354471 A CN 113354471A
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- 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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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- 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
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The invention discloses a compound fertilizer for flying application and a preparation method thereof, belonging to the technical field of compound fertilizers. The compound fertilizer is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then introducing the mixed material into a granulator. The preparation method comprises the following steps: s1, dissolving the first fertilizer at the temperature of 125-130 ℃; s2, mixing the dissolved first fertilizer and the second fertilizer at the temperature of 110-120 ℃ to obtain a first mixture; s3, mixing the first mixture with a third fertilizer to obtain a second mixture; and S4, introducing the second mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then introducing the mixed material with the temperature of 95-100 ℃ into a granulator for granulation to obtain the compound fertilizer. The invention ensures the material fluidity and improves the mixing amount of the potassium fulvate.
Description
Technical Field
The invention relates to the technical field of compound fertilizers, in particular to a compound fertilizer for flying application and a preparation method thereof.
Background
In the existing high tower fertilizer production system, the compound fertilizer for flying application is difficult to produce, the compound fertilizer for flying application is prepared by granulating through a granulator, the temperature of the compound fertilizer entering the granulator cannot be too high, generally is 95-100 ℃, the compound fertilizer cannot be cooled through the granulator to prepare formed granules when the temperature is too high, and potassium fulvate is difficult to convert into liquid at a lower temperature of 95-100 ℃ in the process of preparing the fertilizer, so that the doping amount of the potassium fulvate in the fertilizer is difficult to increase.
Disclosure of Invention
The invention aims to overcome the technical defects, provides a compound fertilizer for flying application and a preparation method thereof, and solves the technical problem of how to ensure the material fluidity and improve the doping amount of potassium fulvate in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention provides a compound fertilizer for flying application and a preparation method thereof.
A compound fertilizer for flying application is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixture with the temperature of 95-100 ℃, and then introducing the mixture with the temperature of 95-100 ℃ into a granulator to obtain the compound fertilizer; the first fertilizer comprises urea; the second fertilizer comprises potassium sulfate, phosphate fertilizer and magnesium oxide; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 25-35% of urea, 10-20% of phosphate fertilizer, 5-25% of potassium sulfate, 20-30% of potassium fulvate, 0.1-0.2% of granulation auxiliary agent, 4-8% of magnesium oxide and 100% of the total.
Further, the first fertilizer also comprises a synergist which accounts for 1-2% of the total mass of the compound fertilizer.
Further, the synergist comprises one or more of algal polysaccharides, chitosan oligosaccharide and polyglutamic acid.
Further, the first fertilizer also comprises a trace element additive, and the trace element additive accounts for 2-5% of the total mass of the compound fertilizer.
Further, the microelement additive comprises one or more of calcium fertilizer, boron fertilizer, zinc fertilizer, copper fertilizer, manganese fertilizer, molybdenum fertilizer and iron fertilizer.
Further, the second fertilizer also comprises active silicon, and the active silicon accounts for 1-3% of the total mass of the compound fertilizer.
The invention also provides a preparation method of the compound fertilizer for flying application, which comprises the following steps:
s1, dissolving the first fertilizer at the temperature of 125-130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at the temperature of 110-120 ℃ to obtain a first mixture;
s3, mixing the first mixture with the temperature of 110-120 ℃ and a third fertilizer at 95-110 ℃ to obtain a second mixture;
s4, feeding the second mixture with the temperature of 95-110 ℃ into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then feeding the mixed material with the temperature of 95-100 ℃ into a granulator for granulation to obtain the compound fertilizer.
Further, in step S2, the first fertilizer and the second fertilizer are mixed at 110-120 ℃ for 1-3min to obtain the first mixture.
Further, in step S3, the first mixture and the third fertilizer are mixed at 95-110 ℃ for 1-3min to obtain the second mixture.
Further, in step S3, the second mixture is passed into the emulsifying machine for emulsifying for 1-2 min.
Compared with the prior art, the invention has the beneficial effects that: the content of the potassium fulvate in the compound fertilizer for flying application provided by the invention can be increased to 20-30%, mainly because the temperature of the mixed material obtained by emulsifying and mixing the materials and the mixture ratio in the emulsifying machine has better fluidity at 95-100 ℃, and the temperature of the mixed material entering a granulator is 95-100 ℃, so that the mixed material can be condensed and formed under the coordination of all formulas to obtain the compound fertilizer with uniform particles of 1.0-2.0 mm, and the mixing amount of the potassium fulvate is increased while the fluidity of the material is ensured.
In the preparation method provided by the invention, urea in a first fertilizer is dissolved at the temperature of 125-130 ℃ to become liquid, a fluid is provided for other solid components, the dissolved first fertilizer and a second fertilizer are mixed at the temperature of 110-120 ℃ to obtain a first mixture, potassium sulfate and magnesium oxide in the second fertilizer in the first mixture are mixed with the second fertilizer at the temperature of 95-110 ℃ along with liquid urea, the magnesium oxide can be co-melted with potassium fulvate with higher content in a third fertilizer at the temperature to promote the potassium fulvate to be rapidly mixed with other substances to be liquid, so that the mixed material is diluted, and then the mixed material is emulsified to obtain a mixed material with fluidity at the temperature of 95-100 ℃, and the mixed material can be smoothly fed into a granulator for granulation and cooling to obtain the compound fertilizer with uniform particles and the particle size of 1.0-2.0 mm.
Detailed Description
The specific embodiment provides a compound fertilizer for flying application, which is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then introducing the mixed material with the temperature of 95-100 ℃ into a granulator; the first fertilizer comprises urea, a synergist and a trace element additive; the second fertilizer comprises potassium sulfate, phosphate fertilizer, magnesium oxide and active silicon; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 25-35% of urea, 10-20% of phosphate fertilizer, 5-25% of potassium sulfate, 20-30% of potassium fulvate, 0.1-0.2% of granulation auxiliary agent, 4-8% of magnesium oxide, 2-5% of trace element additive, 1-2% of synergist and 1-3% of active silicon, wherein the total is 100%.
Further, in this embodiment, the synergist includes one or more of algal polysaccharides, chitosan oligosaccharide and polyglutamic acid, and the trace element additive includes one or more of calcium fertilizer, boron fertilizer, zinc fertilizer, copper fertilizer, manganese fertilizer, molybdenum fertilizer and iron fertilizer; the phosphate fertilizer is monoammonium phosphate and/or monopotassium phosphate.
Further, the sulfur fertilizer is ammonium sulfate and/or potassium sulfate; the magnesium fertilizer is one or more of magnesium nitrate, magnesium sulfate and magnesium chloride; the calcium fertilizer is calcium magnesium nitrate and/or calcium ammonium nitrate. The boric fertilizer is one or more of boric acid, borax and tetrahydrate octaboron; the zinc fertilizer is one or more of zinc nitrate, zinc sulfate and chelated zinc; the copper fertilizer is one or more of copper sulfate, copper chloride and chelated copper; the manganese fertilizer is one or more of manganese sulfate, manganese chloride and chelated manganese; the molybdenum fertilizer is sodium molybdate and/or ammonium molybdate; the iron fertilizer is one or more of ferric sulfate, ferrous sulfate and chelated iron.
The specific embodiment also provides a preparation method of the compound fertilizer for flying application, which comprises the following steps:
s1, dissolving the first fertilizer at the temperature of 125-130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at the temperature of 110-120 ℃ for 1-3min to obtain a first mixture;
s3, mixing the first mixture and a third fertilizer at 95-110 ℃ for 1-2min to obtain a second mixture;
s4, introducing the second mixture with the temperature of 95-110 ℃ into an emulsifying machine to emulsify for 2-5min to obtain a mixed material with the temperature of 95-100 ℃, and then introducing the mixed material with the temperature of 95-100 ℃ into a granulator to granulate to obtain the compound fertilizer.
And finally, the mixed material with the temperature of 95-100 ℃ enters a granulator to be sprayed out, the slurry is naturally fractured after being sprayed out, the mixed material shrinks into spheres due to the liquid tension, and the heat exchange cooling temperature of the high-temperature spheres and air is reduced from 95-100 ℃ to 60-70 ℃ to crystallize into solid spheres which fall to a disc collector. The temperature of the granules is controlled between 30 ℃ and 35 ℃ after the granules are cooled twice and sieved twice, and the size of the granules is controlled between 2.2mm and 4.2 mm. Then the finished products are coated and sieved to obtain finished products of 2.2mm-3mm and 3mm-4.2mm, and finally the finished products are packaged and put in storage.
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.
The granulation aids in the following examples were purchased from agrotechnical corporation, and the granulators in the following examples were tall tower granulators.
Example 1
The embodiment provides a compound fertilizer for flying application, which is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95 ℃, and then introducing the mixed material with the temperature of 95 ℃ into a granulator; the first fertilizer comprises urea, a synergist and a trace element additive; the second fertilizer comprises potassium sulfate, phosphate fertilizer, magnesium oxide and active silicon; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 35% of urea, 17% of phosphate fertilizer, 5% of potassium sulfate, 30% of potassium fulvate, 0.1% of granulation auxiliary agent, 7% of magnesium oxide, 3% of a mixture of trace element additives of boric acid, ferric EDTA, manganese EDTA, copper EDTA and molybdenum EDTA, 1% of synergist algal polysaccharide, 1% of active silicon and 100% of the total.
The embodiment also provides a preparation method of the compound fertilizer for aerial application, which comprises the following steps:
s1, dissolving the first fertilizer at 130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at 115 ℃ for 3min to obtain a first mixture;
s3, mixing the first mixture and a third fertilizer at 105 ℃ for 2min to obtain a second mixture;
s4, introducing the second mixture with the temperature of 105 ℃ into an emulsifying machine to emulsify for 2min to obtain a mixed material with the temperature of 95 ℃, and then introducing the mixed material with the temperature of 95 ℃ into a granulator to granulate to obtain the compound fertilizer.
The particle size of the compound fertilizer prepared by the embodiment is 1.0-2.0 mm, and the particles are uniform.
Example 2
The embodiment provides a compound fertilizer for flying application, which is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 96 ℃, and then introducing the mixed material with the temperature of 96 ℃ into a granulator; the first fertilizer comprises urea, a synergist and a trace element additive; the second fertilizer comprises potassium sulfate, phosphate fertilizer, magnesium oxide and active silicon; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 25% of urea, 20% of potassium dihydrogen phosphate of phosphate fertilizer, 18% of potassium sulfate, 24% of potassium fulvate, 0.1% of granulation auxiliary agent, 5% of magnesium oxide, 2% of a mixture of trace element additives of calcium magnesium nitrate and ammonium molybdate, 2% of synergist chitosan oligosaccharide and 3% of active silicon, wherein the total amount is 100%.
The embodiment also provides a preparation method of the compound fertilizer for aerial application, which comprises the following steps:
s1, dissolving the first fertilizer at 125 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at 120 ℃ for 2min to obtain a first mixture;
s3, mixing the first mixture and a third fertilizer at 100 ℃ for 1min to obtain a second mixture;
s4, introducing the second mixture with the temperature of 100 ℃ into an emulsifying machine to emulsify for 2min to obtain a mixed material with the temperature of 96 ℃, and then introducing the mixed material with the temperature of 96 ℃ into a granulator to granulate to obtain the compound fertilizer.
The particle size of the compound fertilizer prepared by the embodiment is 1.0-2.0 mm, and the particles are uniform.
Example 3
The embodiment provides a compound fertilizer for flying application, which is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 100 ℃, and then introducing the mixed material with the temperature of 100 ℃ into a granulator; the first fertilizer comprises urea, a synergist and a trace element additive; the second fertilizer comprises potassium sulfate, phosphate fertilizer, magnesium oxide and active silicon; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 30% of urea, 20% of phosphate fertilizer monoammonium phosphate, 13% of potassium sulfate, 20% of potassium fulvate, 0.2% of granulation auxiliary agent, 8% of magnesium oxide, 3% of a mixture of trace element additives EDTA iron, EDTA manganese, EDTA copper and EDTA molybdenum, 2% of synergist and 2% of active silicon, wherein the total is 100%.
The embodiment also provides a preparation method of the compound fertilizer for aerial application, which comprises the following steps:
s1, dissolving the first fertilizer at 130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at 115 ℃ for 1min to obtain a first mixture;
s3, mixing the first mixture and a third fertilizer at 110 ℃ for 1min to obtain a second mixture;
s4, introducing the second mixture with the temperature of 110 ℃ into an emulsifying machine to emulsify for 2min to obtain a mixed material with the temperature of 100 ℃, and then introducing the mixed material with the temperature of 100 ℃ into a granulator to granulate to obtain the compound fertilizer.
The particle size of the compound fertilizer prepared by the embodiment is 1.0-2.0 mm, and the particles are uniform.
Example 4
The embodiment provides a compound fertilizer for flying application, which is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 98 ℃, and then introducing the mixed material with the temperature of 98 ℃ into a granulator; the first fertilizer comprises urea, a synergist and a trace element additive; the second fertilizer comprises potassium sulfate, phosphate fertilizer, magnesium oxide and active silicon; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 31% of urea, 10% of phosphate fertilizer monoammonium phosphate, 16% of potassium sulfate, 30% of potassium fulvate, 0.1% of granulation auxiliary agent, 4% of magnesium oxide, 5% of mixture of trace element additives EDTA iron, EDTA manganese, EDTA copper and EDTA molybdenum, 2% of synergist polyglutamic acid and 1% of active silicon, and the total is 100%.
The embodiment also provides a preparation method of the compound fertilizer for aerial application, which comprises the following steps:
s1, dissolving the first fertilizer at 130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at 110 ℃ for 1min to obtain a first mixture;
s3, mixing the first mixture and a third fertilizer at 110 ℃ for 2min to obtain a second mixture;
s4, introducing the second mixture with the temperature of 110 ℃ into an emulsifying machine to emulsify for 2min to obtain a mixed material with the temperature of 98 ℃, and then introducing the mixed material with the temperature of 98 ℃ into a granulator to granulate to obtain the compound fertilizer.
The particle size of the compound fertilizer prepared by the embodiment is 1.0-2.0 mm, and the particles are uniform.
Comparative example 1
This comparative example differs from example 1 in that the second fertilizer is free of magnesium oxide, the other formulation and preparation method are the same, and it was found that the mixture obtained in step S4 is viscous and cannot be further passed into a granulator for granulation.
In the following application examples, other fertilizers were purchased from the market, and among them, the fertilizer specially used for strong tea leaves was purchased from a fertilizer produced by ecological agriculture limited company of jiama chi, north Hu.
Application example 1
Tea leaf fertilizer application
Treatment 1: the compound fertilizer prepared in the example 2 is 100 kg/mu, and the tea leaves are applied and treated by two times;
and (3) treatment 2: 40% of local habit common compound fertilizer is 100 kg/mu, and the compound fertilizer is applied twice.
In each treatment, the fertilizer is applied before the middle of Yuanyue, the fertilizer is applied for the second time in the middle of 5 Yueyuei, and other field management measures such as disease, pest and weed control and the like are locally recommended. And (4) beginning to collect spring tea from the bottom of 3 months, and counting the yield of fresh leaves according to the cell in each time from the end of collecting summer tea in the middle ten days of 7 months.
TABLE 1 comparison of tea yields for different treatments
As can be seen from Table 1, the amount of fresh tea leaves was 10/kg. The price of the special fertilizer for strengthening is preferably 3 yuan/kg, and the price of the local conventional fertilizer is 2.8 yuan/kg. Compared with conventional fertilization, the special fertilizer treatment suitable for the flying fertilization can increase the yield by 290 yuan, and the effect of increasing the yield is obvious.
After the unmanned aerial vehicle fly-fertilization technology is applied to the compound fertilizer of embodiment 2, compared with artificial fertilization, the fertilizer application efficiency can be improved in a mountain environment, and the fertilizer input is reduced. Compared with the common compound fertilizer with equal proportion used conventionally in the local, the compound fertilizer has scientific fertilizer proportion, and moderate trace elements and organic matters are added in a proper amount, so that the problems of unreasonable proportion of nitrogen, phosphorus and potassium, insufficient use amount of organic fertilizer, neglect of application of the moderate trace elements and the like existing in the conventional fertilizer application in the local tea production are effectively solved. And under the condition of adopting the flying fertilization technology, the fertilization of a remote area is relatively efficient and convenient. Later, along with the improvement of unmanned aerial vehicle technique, also perhaps we carry out further study to the fertilizer for the fertilizer effect obtains better embodiment, further raises the efficiency, makes the contribution for the agricultural is light to simplify.
Application example 2
Rape fertilization
Treatment 1: the compound fertilizer prepared in example 3 is 40 kg/mu, and the seed manure is sowed simultaneously by using an unmanned aerial vehicle.
And (3) treatment 2: applying 45% (15-15-15) of compound fertilizer 40 kg/mu in a basal way and applying 7.5 kg/mu of urea in an additional way.
TABLE 2 comparison of yield of oilseed rape from different treatments
As can be seen from Table 2, the compound fertilizer of example 3 adopts a flying application method to carry out seed and fertilizer co-sowing on rape, so that the labor is reduced on the one hand. On the other hand, the yield of the rape is improved by more scientific nutrient proportion, and the local conventional fertilizer is the fertilizer with the formula of 15-15-15 in equal proportion and matched with the additional application of urea, so that the fertilizer has the problems of vigorous growth in seedling stage and insufficient fertility in later period, and the additional application of urea is realized. The composite fertilizer of example 3 treated rape grew better. When planting the scale bigger, unmanned aerial vehicle efficiency is higher, can divide thin cost relatively. Meanwhile, after the unmanned aerial vehicle technology is further developed, the labor cost of farmers can be further reduced through the special fertilizer for flying application, the agriculture is simplified, and the rape production efficiency is improved.
Other beneficial effects are as follows:
1) the compound fertilizer granule provided by the invention concentrates nitrogen, phosphorus and potassium basic elements required by plants and chelates medium and trace elements required by crops, and potassium fulvate is also added to prepare a full-effect overall balanced fertilizer, the granular particles are fine and efficiently absorbed, the use characteristics of high concentration and favorable dispersion in flying application and high efficiency are met, the high efficiency and no residue are generated, the compound fertilizer is rich in potassium fulvate, the crop growth is rapidly improved in a short period, the high efficiency of stage fertilization is realized, and the fertilizer in each stage does not run off and generate phytotoxicity excessively.
2) The high tower granulation process fully utilizes the heat energy of the fused urea and other component melts, has low material moisture content, does not need a drying process, and greatly saves energy consumption.
3) The components of the compound fertilizer are uniformly distributed, and each particle component is basically consistent.
4) The compound fertilizer has good physical properties, low water content and difficult caking.
5) The compound fertilizer granules all have a small hole, are not easy to imitate, have the anti-counterfeiting function, have good operating environment and have no three wastes.
6) The high tower granulation process can produce high-concentration urea-based nitrogen-phosphorus-potassium ternary compound fertilizer for direct application, and also can produce high-concentration urea-based nitrogen-potassium binary compound fertilizer as raw material fertilizer of bulk blend fertilizer.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The compound fertilizer for flying application is characterized in that the compound fertilizer is prepared by mixing a first fertilizer, a second fertilizer and a third fertilizer, then introducing the mixture into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then introducing the mixed material with the temperature of 95-100 ℃ into a granulator; the first fertilizer comprises urea; the second fertilizer comprises potassium sulfate, phosphate fertilizer and magnesium oxide; the third fertilizer comprises potassium fulvate and a granulation auxiliary agent;
the compound fertilizer comprises the following components in percentage by mass: 25-35% of urea, 10-20% of phosphate fertilizer, 5-25% of potassium sulfate, 20-30% of potassium fulvate, 0.1-0.2% of granulation auxiliary agent and 4-8% of magnesium oxide, wherein the total is 100%.
2. The compound fertilizer for flying application of claim 1, wherein the first fertilizer further comprises a synergist, the synergist occupying 1-2% of the total mass percent of the compound fertilizer.
3. The compound fertilizer for flying application of claim 2, wherein the synergist comprises one or more of algal polysaccharides, chitosan oligosaccharide and polyglutamic acid.
4. The compound fertilizer for flying application of claim 1, wherein the first fertilizer further comprises a trace element additive, the trace element additive occupying 2-5% of the total mass percentage in the compound fertilizer.
5. The compound fertilizer for flying application of claim 4, wherein the trace element additives comprise one or more of calcium fertilizers, boron fertilizers, zinc fertilizers, copper fertilizers, manganese fertilizers, molybdenum fertilizers and iron fertilizers.
6. The compound fertilizer for flying application of claim 1, wherein the second fertilizer further comprises active silicon, and the active silicon accounts for 1-3% of the total mass of the compound fertilizer.
7. A method of preparing a compound fertilizer for fly application as claimed in any one of claims 1 to 6, comprising the steps of:
s1, dissolving the first fertilizer at the temperature of 125-130 ℃ according to the mass percentage;
s2, mixing the dissolved first fertilizer and the dissolved second fertilizer at the temperature of 110-120 ℃ to obtain a first mixture;
s3, mixing the first mixture with the temperature of 110-120 ℃ and a third fertilizer at 95-110 ℃ to obtain a second mixture;
s4, feeding the second mixture with the temperature of 95-110 ℃ into an emulsifying machine for emulsification to obtain a mixed material with the temperature of 95-100 ℃, and then feeding the mixed material with the temperature of 95-100 ℃ into a granulator for granulation to obtain the compound fertilizer.
8. The preparation method as claimed in claim 7, wherein in step S2, the first fertilizer and the second fertilizer are mixed at 110-120 ℃ for 1-3min to obtain the first mixture.
9. The method of claim 7, wherein the first mixture is mixed with the third fertilizer at 95-110 ℃ for 1-3min to obtain the second mixture in step S3.
10. The method of claim 7, wherein the second mixture is passed into the emulsifying machine for emulsifying for 1-2min in step S3.
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