CN115784796B - Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer - Google Patents
Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer Download PDFInfo
- Publication number
- CN115784796B CN115784796B CN202211680374.3A CN202211680374A CN115784796B CN 115784796 B CN115784796 B CN 115784796B CN 202211680374 A CN202211680374 A CN 202211680374A CN 115784796 B CN115784796 B CN 115784796B
- Authority
- CN
- China
- Prior art keywords
- fertilizer
- trace elements
- granulating
- chelated
- chelating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 183
- 239000011573 trace mineral Substances 0.000 title claims abstract description 85
- 235000013619 trace mineral Nutrition 0.000 title claims abstract description 85
- 150000001875 compounds Chemical class 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 65
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 52
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 49
- LJCWONGJFPCTTL-UHFFFAOYSA-N 4-hydroxyphenylglycine Chemical class OC(=O)C(N)C1=CC=C(O)C=C1 LJCWONGJFPCTTL-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 46
- 239000004254 Ammonium phosphate Substances 0.000 claims abstract description 40
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims abstract description 40
- 235000019289 ammonium phosphates Nutrition 0.000 claims abstract description 40
- 239000004202 carbamide Substances 0.000 claims abstract description 40
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002738 chelating agent Substances 0.000 claims abstract description 39
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 29
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 26
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 23
- 239000002686 phosphate fertilizer Substances 0.000 claims abstract description 23
- 229940072033 potash Drugs 0.000 claims abstract description 23
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 23
- 235000015320 potassium carbonate Nutrition 0.000 claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 239000008187 granular material Substances 0.000 claims description 112
- 239000000243 solution Substances 0.000 claims description 59
- 239000000463 material Substances 0.000 claims description 56
- 238000002156 mixing Methods 0.000 claims description 55
- 238000005507 spraying Methods 0.000 claims description 52
- 239000000843 powder Substances 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- 239000011248 coating agent Substances 0.000 claims description 33
- 238000000576 coating method Methods 0.000 claims description 33
- 239000011259 mixed solution Substances 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000011701 zinc Substances 0.000 claims description 24
- 229910052725 zinc Inorganic materials 0.000 claims description 24
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 23
- 229910052796 boron Inorganic materials 0.000 claims description 23
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 22
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 16
- 229910021538 borax Inorganic materials 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 11
- 239000004328 sodium tetraborate Substances 0.000 claims description 11
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 11
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 9
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 9
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 9
- STNSYZSNIYTNMI-UHFFFAOYSA-N azane;[2-[bis(phosphonomethyl)amino]ethyl-(phosphonomethyl)amino]methylphosphonic acid Chemical compound N.OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O STNSYZSNIYTNMI-UHFFFAOYSA-N 0.000 claims description 9
- 235000002867 manganese chloride Nutrition 0.000 claims description 9
- 239000011565 manganese chloride Substances 0.000 claims description 9
- 229940099607 manganese chloride Drugs 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 8
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 8
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 8
- 235000005074 zinc chloride Nutrition 0.000 claims description 8
- 239000011592 zinc chloride Substances 0.000 claims description 8
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 7
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 7
- 229940099596 manganese sulfate Drugs 0.000 claims description 7
- 235000007079 manganese sulphate Nutrition 0.000 claims description 7
- 239000011702 manganese sulphate Substances 0.000 claims description 7
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 7
- 229940116318 copper carbonate Drugs 0.000 claims description 6
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 claims description 6
- VEPSWGHMGZQCIN-UHFFFAOYSA-H ferric oxalate Chemical compound [Fe+3].[Fe+3].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O VEPSWGHMGZQCIN-UHFFFAOYSA-H 0.000 claims description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 6
- 229960001763 zinc sulfate Drugs 0.000 claims description 6
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 2
- YPPQYORGOMWNMX-UHFFFAOYSA-L sodium phosphonate pentahydrate Chemical compound [Na+].[Na+].[O-]P([O-])=O YPPQYORGOMWNMX-UHFFFAOYSA-L 0.000 claims description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims 1
- 239000001632 sodium acetate Substances 0.000 claims 1
- 235000017281 sodium acetate Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 41
- 239000002689 soil Substances 0.000 abstract description 34
- 238000005469 granulation Methods 0.000 abstract description 23
- 230000003179 granulation Effects 0.000 abstract description 23
- 238000010298 pulverizing process Methods 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract description 14
- 238000003860 storage Methods 0.000 abstract description 14
- 235000015097 nutrients Nutrition 0.000 abstract description 11
- 229910021645 metal ion Inorganic materials 0.000 abstract description 9
- 239000004114 Ammonium polyphosphate Substances 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 8
- 235000019826 ammonium polyphosphate Nutrition 0.000 abstract description 8
- 229920001276 ammonium polyphosphate Polymers 0.000 abstract description 8
- 230000009920 chelation Effects 0.000 abstract description 8
- 239000013522 chelant Substances 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 5
- 230000000536 complexating effect Effects 0.000 abstract description 3
- 230000003472 neutralizing effect Effects 0.000 abstract description 3
- 230000008635 plant growth Effects 0.000 abstract description 3
- 239000000839 emulsion Substances 0.000 description 32
- 230000035558 fertility Effects 0.000 description 28
- 240000008042 Zea mays Species 0.000 description 15
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 15
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 15
- 235000005822 corn Nutrition 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 244000061456 Solanum tuberosum Species 0.000 description 12
- 235000002595 Solanum tuberosum Nutrition 0.000 description 12
- 230000004720 fertilization Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 230000002950 deficient Effects 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 8
- 235000012015 potatoes Nutrition 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- 235000016709 nutrition Nutrition 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 208000035240 Disease Resistance Diseases 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 5
- 230000020477 pH reduction Effects 0.000 description 5
- -1 ammonium ions Chemical class 0.000 description 4
- 230000035764 nutrition Effects 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- JJVODHIRRAFJDE-UHFFFAOYSA-N 2-(hydroxyamino)-2-phenylacetic acid Chemical class ONC(C(O)=O)C1=CC=CC=C1 JJVODHIRRAFJDE-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 235000015816 nutrient absorption Nutrition 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000010496 root system development Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 229960003280 cupric chloride Drugs 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000018343 nutrient deficiency Nutrition 0.000 description 1
- 239000002420 orchard Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940006198 sodium phenylacetate Drugs 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
A preparation method of a chelate fertilizer for improving the chelating ability of trace elements of a compound fertilizer belongs to the technical field of fertilizers, and the chelate fertilizer comprises ammonium salt, phosphate fertilizer, potash fertilizer, chelating agent, light burned magnesium powder, trace elements, concentrated sulfuric acid, urea solution, p-hydroxyphenylglycine salt and polycondensed ammonium phosphate; the preparation method of the chelated fertilizer adopts granulation and spray reaction, improves the chelating property of trace elements and ammonium polyphosphate, generates magnesium sulfate with different milky crystal water, improves the balling rate of the chelated particles, ensures that anhydrous magnesium sulfate can absorb residual free water in fertilizer particles and moisture absorbed by the fertilizer during storage and transportation, ensures that the free water becomes crystal water, prevents the particles from cracking, pulverizing and caking, can well lock nutrient components, accelerates complexing coordination of metal ions in soil under the chelation effect, ensures that the metal ions are easier to be absorbed by plants and have long fertilizer efficiency period, and also has good effects of neutralizing the acid and alkali of soil, improving the soil property and improving the environment for plant growth.
Description
Technical Field
The invention belongs to the technical field of fertilizers, and particularly relates to a preparation method of a chelated fertilizer for improving the chelating capacity of trace elements in a compound fertilizer.
Background
At present, the cultivated land in China has obvious effects on soil acidification, shallow cultivated layer and the like, and 14.5% of the cultivated land has serious acidification on the aspect of cultivated land acidification. In the last 30 years, the acidized cultivated area with the pH value of soil in the places such as Hunan, jiangxi, guangxi and the like being less than 5.5 is increased by 35 percent, and the yield of crops is reduced by more than 20 percent.
The acid-base property of the compound fertilizer refers to the acid-base property of the fertilizer which is dissolved in water, and the fertilizer can be classified into an acid fertilizer, an alkaline fertilizer and a neutral fertilizer according to the definition. Different plants have self-adaptive soil pH value ranges, and the modern agriculture causes unbalance of soil acid and alkali due to the fact that a large amount of element compound fertilizer is applied for a long time and a large amount of fertilizer is dissolved in liquid phase of soil. Further, the effective utilization rate of different nutrients is reduced, ecological environment in soil is destroyed, and the growth of crops is hindered, so that the balance of the soil needs to be improved as much as possible when chemical fertilizers are used.
A large amount of data prove that the balance of nutrients in soil is seriously damaged by applying fertilizers in excess, especially unbalanced fertilization, and the acidification degree of the soil is accelerated by using acid fertilizers in large quantities. Soil in greenhouses, orchards and vegetable gardens planted in successive years is obviously acidified, so that soil hardening is caused, root growth of crops is seriously affected, plant vigor is weakened, disease resistance is reduced, medium and trace element utilization rate is reduced, a large amount of nutrients cannot be absorbed, nutrition deficiency occurs, the growth of crops is hindered, the improvement of crop yield and quality is limited, and the development of modern agriculture is seriously restricted.
Therefore, the acidified soil needs to be balanced with alkaline fertilizer to solve the problem that the acidification aggravates the nutrient absorption of crops.
Wherein, the alkaline chelated medium trace elements can effectively improve the acid soil and the nutrient utilization rate. The large-area demonstration field test proves that the pH of the soil is improved by 0.2-1.0 unit, and the yield of crops is increased by 12% -27%. However, the following problems are also present in alkaline chelation of trace elements:
(1) The source of N in the compound fertilizer is ammonium salts such as ammonium chloride and ammonium sulfate, and a small amount of free water still exists in the compound fertilizer. Ammonium salt in the fertilizer particles is dissolved in free water to ionize ammonium ions, and under alkaline conditions, the ammonium ions are combined with hydroxyl ions to react to generate ammonia gas and water: NH4+ OH- = NH3 ++H2O, the ammonia that the reaction generated volatilizes to the air and causes the loss waste of nutrient to produce pungent smell, the water of production can accelerate the pulverization of fertilizer granule simultaneously.
(2) The compound fertilizer particles contain free water, and during the storage and transportation processes, recrystallization is caused between the particle surfaces, and crystal bridges are formed to cause the compound fertilizer to agglomerate. With the generation of thermal effect, the double salt component is recrystallized, so that the granular product expands, contracts and releases or absorbs energy, and the product is cracked, pulverized and agglomerated.
(3) When the temperature changes, the crystal forms also change, so that the density and the volume of each crystal grain in the particles change, the mechanical stress in the particles is caused, the particles are broken, and the caking degree is increased.
(4) The chelating ability of trace elements, especially trace elements and condensed ammonium phosphate, is poor, and after fertilization, zinc, manganese, iron, copper and the like are liable to form hydroxide precipitates which are difficult to dissolve in water and are difficult to be absorbed and utilized smoothly, and the problems of antagonism among elements, difficult absorption by plants, low utilization rate and the like generally exist.
The phenomena can directly destroy the chelating force of trace elements, so that the efficacy is unbalanced after fertilization, or the fertilization nutrition is uneven and lost, and the problems of insufficient effect of adjusting and improving the acid soil, or excessive part of elements and deficient part of elements are caused.
Disclosure of Invention
Aiming at the problems that the existing alkaline chelate fertilizer has poor chelating force, is easy to generate phenomena of cracking, pulverization and caking, is difficult to absorb medium and trace elements, unbalance or loss of elements and weakens the acid-base regulation capability. The invention provides a preparation method of a chelated fertilizer for improving the chelating capacity of trace elements in a compound fertilizer, which adopts granulation and spray reaction to improve the chelating capacity of trace elements, generate magnesium sulfate with different emulsion crystal water, improve the balling rate of the chelated particles, enable anhydrous magnesium sulfate to absorb residual free water in fertilizer particles and moisture absorbed by the fertilizer during storage and transportation, enable the free water to be changed into crystal water, prevent the particles from cracking, pulverizing and caking, well lock nutritional ingredients, accelerate complexing coordination of metal ions in soil under the chelation effect, enable the metal ions to be absorbed by plants more easily and have long fertilizer effect period, and also have the effects of well neutralizing the acid and alkali of soil, improving soil properties, improving the environment for plant growth, promoting root system development, improving disease resistance, increasing crop yield, improving product quality and the like. The specific technical scheme is as follows:
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 25-35 parts of ammonium salt, 20-30 parts of phosphate fertilizer, 10-25 parts of potash fertilizer, 0.3-0.5 part of chelating agent, 4-6 parts of light burned magnesium powder, 0.3-0.5 part of microelement, 6-8 parts of concentrated sulfuric acid, 1-2.5 parts of urea solution, 0.6-1 part of p-hydroxyphenylglycine salt and 1-3 parts of polycondensed ammonium phosphate according to mass ratio;
wherein the chelating agent is at least one of EDDHA-Na, HEDP and EDTMPS; the EDDHA-Na is ethylenediamine di-o-sodium phenylacetate, the HEDP is hydroxyethylidene diphosphonic acid, and the EDTMPS is ethylenediamine tetramethylene sodium phosphonate;
The trace elements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is at least one of copper carbonate, copper chloride and copper sulfate; the zinc element is at least one of zinc sulfate and zinc chloride; the manganese element is at least one of manganese chloride and manganese sulfate; the boron element is borax; the iron element is at least one of ferric chloride and ferric oxalate;
the mass concentration of the concentrated sulfuric acid is 92-93%;
The mass concentration of the urea solution is 94-96%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
Dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 60-70%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulating, and then spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode to improve the chelating property of the polycondensed ammonium phosphate and microelements; then spraying the mixed solution B into an inner material bed of the granulator in a spray mode; the light burned magnesium powder reacts with sulfuric acid, and under the action of steam and mixed liquid B, emulsion magnesium sulfate is generated, and reaction heat is released;
The spraying method comprises the following steps: after the material A is granulated and operated for 8-15 s, spraying the saline solution of the p-hydroxyphenylglycine, wherein the spraying temperature is 70-80 ℃; spraying the mixed solution B, and continuing to granulate for 5-6 min at the spraying temperature of 100 ℃ to obtain a granular material A;
Wherein the temperature in the granulator is 55-60 ℃, the granulating size is 2-5 mm after granulating, and the granulating rate is 75-90%;
the milky magnesium sulfate is magnesium sulfate with different crystal water;
s4, drying:
Drying the granular material A at 70-120 ℃ for 30-50 min, wherein the water content of the dried granules is less than 1.5%, and the emulsion magnesium sulfate in the granules is dried to anhydrous magnesium sulfate;
S5, post-treatment:
screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm;
The coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surface of the granules is uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is 1000 to (2-3) to (4-5).
Compared with the prior art, the preparation method of the chelated fertilizer for improving the chelating ability of the trace elements of the compound fertilizer has the beneficial effects that:
1. The preparation method adopts at least one of EDDHA-Na, HEDP and EDTMPS as the chelating agent, and under the alkaline condition, the complexing coordination ratio of the chelating agent and metal ions is higher than 7 percent, the magnesium ions are higher than 4 percent, and the calcium ions are higher than 5 percent; the chelating ability is shown in FIGS. 1-3.
2. The preparation method of the invention adds the condensed ammonium phosphate, wherein the condensed ammonium phosphate is a polyphosphate containing N and P, the phosphorus content of the ammonium polyphosphate is up to 30-32%, the nitrogen content of the ammonium polyphosphate is 14-16%, and the ammonium polyphosphate is a high-quality fertilizer additive and has disease resistance, but the current use amount of the condensed ammonium phosphate in the chelated fertilizer is very small, mainly because the chelating property of the condensed ammonium phosphate and trace elements is poor, and the current polymerization degree of the agricultural ammonium polyphosphate is usually 5-18, the polymerization degree is small, and the chelated particles are easy to disintegrate due to water absorption. The preparation method adopts the hydroxyphenylglycine salt water solution to spray the trace elements and the condensed ammonium phosphate, improves the chelating property of the trace elements and the condensed ammonium phosphate, and generates the p-hydroxyphenylglycine chelate containing the trace elements and the condensed ammonium phosphate. In addition, emulsion magnesium sulfate with different crystal water is synthesized by adopting a spray mode, and the chelating property of metal ions and ammonium polyphosphate can be further assisted to be improved.
3. The preparation method can enable light burned magnesium powder to react with sulfuric acid in the particle forming process, magnesium sulfate with different milky crystal water is generated in the particle, the balling rate of chelating particles is improved, anhydrous magnesium sulfate after granulation can absorb residual free water in fertilizer particles and moisture absorbed by the fertilizer during storage and transportation, the free water is changed into crystal water, the phenomena of cracking, pulverization and caking of the particles are prevented, nutritional ingredients can be well locked, metal ions in soil are accelerated to carry out complexation coordination under the chelation effect, the metal ions are more easily absorbed by plants and have long fertilizer efficiency period, and the effects of well neutralizing the acid and alkali of the soil, improving the soil properties, improving the environment for plant growth, promoting root system development, improving disease resistance, increasing crop yield, improving product quality and the like are also achieved.
4. The invention adopts the hydroxyphenylglycine salt water solution to combine concentrated sulfuric acid and urea solution for spray addition, designs the spraying step and the temperature, plays respective roles, can effectively complex medium and trace elements (metal ions such as calcium, magnesium, sulfur, iron, copper, zinc, manganese, boron and the like), can maintain fertility for a long time after chelation, does not generate cracking pulverization and caking phenomena of chelating particles even if ammonium polyphosphate absorbs moisture, and can well lock nutrient components.
5. In the preparation method, spray granulation process parameters are designed according to the content and the property of raw materials and the compactness and firmness required by granulation, and have a decisive effect on the quality of the chelating particles.
6. The preparation method designs the spraying sequence and time, can lead the light burned magnesium powder to react with sulfuric acid in the key stage of the balling of the chelate particles, evenly generates emulsion magnesium sulfate in the particle balls, and improves the balling effect; the anhydrous magnesium sulfate generated after drying absorbs free water in fertilizer particles, so that the free water is changed into crystal water, and the finished fertilizer is not pulverized and hardened in the transportation and storage processes; free water in the fertilizer particles disappears, so that ammonium salt cannot ionize and cannot react with alkali, and the fertilizer particles can exist under alkaline conditions, so that nutrition volatilization loss cannot be caused, and the environment is polluted.
7. In the preparation method, the light burned powder reacts with the sulfuric acid, and a large amount of heat is released in the spray dilution process of the concentrated sulfuric acid, so that the material temperature is increased, basic energy is enough for subsequent drying, and the cost is saved.
In conclusion, the chelate fertilizer prepared by the method has good use effect, can improve the crop yield, improves the yield of the middle-low yield field by increasing the content of trace elements in the compound fertilizer, maintains the continuous yield increase of the high yield field, and meets the requirements of crops on various nutrient elements, thereby obtaining ideal yield and benefit. Can improve the quality of crops, greatly improve the inorganic nutrition balance of the crops, greatly improve the quality of agricultural products, effectively reduce the content of nitrite in the agricultural products, effectively prevent diseases caused by local nutrient deficiency, and enhance the disease resistance, cold resistance, high temperature resistance and drought resistance of the crops. The chelate particles prepared by the preparation method can particularly improve the utilization rate of chemical fertilizers, supplement medium trace elements according to the law of small nutrients, are beneficial to balancing the proportion among the large, medium and trace nutrient elements in soil, and have good promotion effect on nutrient absorption of crops. Reducing environmental pollution. The secondary trace element fertilizer can be applied to enable crops to absorb various required nutrient elements in proportion, so that the fertilizer utilization rate is effectively improved, the environmental pollution caused by fertilizer loss is reduced, and the secondary trace element fertilizer plays a positive role in environmental protection.
The preparation method and the subsequent fertilization of the invention involve the reaction equation that ：MgO+H2SO4＝＝＝MgSO4;MgSO4+H2O＝＝MgSO4.(n+1)H2O;NH4CL＝＝NH4 ++Cl-;NH4++OH-＝NH3↑+H2O.
Drawings
FIG. 1 is a graph showing the chelation value of iron ions by using a chelating agent in the preparation method of the chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer.
Fig. 2 is a graph of chelation value of a chelating agent for calcium ions in a method for preparing a chelated fertilizer for improving chelating ability of trace elements in a compound fertilizer.
FIG. 3 is a graph showing the chelation value of a chelating agent for magnesium ions in the preparation method of the chelated fertilizer for improving the chelating ability of trace elements in the compound fertilizer.
Detailed Description
The invention will be further described with reference to specific embodiments and fig. 1, but the invention is not limited to these embodiments.
Example 1
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 30 parts of ammonium salt, 25 parts of phosphate fertilizer, 20 parts of potash fertilizer, 0.4 part of chelating agent, 5 parts of light burned magnesium powder, 0.4 part of trace elements, 7 parts of concentrated sulfuric acid, 2 parts of urea solution, 0.8 part of p-hydroxyphenylglycine salt and 2 parts of polycondensed ammonium phosphate according to the mass ratio;
Wherein the chelating agent is EDDHA-Na; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper carbonate; the zinc element is zinc sulfate; the manganese element is manganese chloride; the boron element is borax; the iron element is ferric chloride; the mass concentration of the concentrated sulfuric acid is 92.5%; the mass concentration of the urea solution is 95%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
Dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 65%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
delivering the material A into a granulator for granulating, wherein the temperature in the granulator is 55 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the granulating operation of the material A is 12s, and the spray temperature is 75 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5min of granulation operation, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 85%;
s4, drying:
drying the granular material A at 120 ℃ for 35min, wherein the water content of the dried granules is 1.2%, and the emulsion magnesium sulfate in the granules is dried to anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:2:4.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the corn field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelated fertilizer of the invention is applied at a rate of 50 kg/mu and the yield of corn per mu is 790 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is 50 kg/mu, the urea 10 kg/mu is applied in the large bell mouth period, and the corn mu yield is 685 kg. Compared with the prior art, the chelated fertilizer has the advantages of increasing yield by 105 kg per mu and good fertility effect.
Example 2
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 25 parts of ammonium salt, 30 parts of phosphate fertilizer, 12 parts of potash fertilizer, 0.3 part of chelating agent, 4 parts of light burned magnesium powder, 0.3 part of trace elements, 6 parts of concentrated sulfuric acid, 1 part of urea solution, 0.6 part of p-hydroxyphenylglycine salt and 1 part of polycondensed ammonium phosphate according to the mass ratio;
Wherein the chelating agent is HEDP; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is cupric chloride; the zinc element is zinc chloride; the manganese element is manganese sulfate; the boron element is borax; the iron element is ferric oxalate;
The mass concentration of the concentrated sulfuric acid is 92%; the mass concentration of the urea solution is 94%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 60%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 60 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the material A is subjected to granulation operation for 8 seconds, and the spray temperature is 70 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after granulating operation is carried out for 6min, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 77%;
s4, drying:
Drying the granular material A at 70 ℃ for 45min, wherein the water content of the dried granules is 1%, and the emulsion magnesium sulfate in the granules is dried into anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:2.5:4.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the potato field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelating fertilizer of the invention is applied at a rate of 150 kg/mu, and the yield of potatoes per mu is 2100 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is 150 kg/mu, and the yield of potatoes per mu is 1650 kg. Compared with the prior art, the chelated fertilizer has the advantages of increasing yield by 450 kg per mu and good fertility effect.
Example 3
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
According to the mass ratio, 35 parts of ammonium salt, 20 parts of phosphate fertilizer, 10 parts of potash fertilizer, 0.5 part of chelating agent, 6 parts of light burned magnesium powder, 0.5 part of trace elements, 8 parts of concentrated sulfuric acid, 2.5 parts of urea solution, 1 part of p-hydroxyphenylglycine salt and 3 parts of polycondensate ammonium phosphate are weighed;
Wherein the chelating agent is EDTMPS; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper sulfate; the zinc element is zinc sulfate; the manganese element is manganese chloride; the boron element is borax; the iron element is ferric chloride;
the mass concentration of the concentrated sulfuric acid is 93%; the mass concentration of the urea solution is 96%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 70%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 58 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the material A is subjected to granulation operation for 15 seconds, and the spray temperature is 80 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5.5min of granulation operation, so as to obtain a granular material A, wherein the granulating size is 2-5 mm, and the granulating balling rate is 80%;
s4, drying:
Drying the granular material A at 75 ℃ for 45min, wherein the water content of the dried granules is 0.9%, and the emulsion magnesium sulfate in the granules is dried to form anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:2:5.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the corn field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The yield per mu of corn is 788 kg when the chelated fertilizer of the invention is applied to 50 kg per mu. The fertilizer is applied by contrast with the common fertilizer (15-15-15S compound fertilizer) of 50 kg/mu, the urea of 10 kg/mu is applied in the large bell mouth period, and the corn yield is 682 kg per mu. Compared with the prior art, the chelated fertilizer has the advantages of 106 kg yield increase per mu and good fertility effect.
Example 4
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 28 parts of ammonium salt, 22 parts of phosphate fertilizer, 25 parts of potash fertilizer, 0.35 part of chelating agent, 4.5 parts of light burned magnesium powder, 0.35 part of trace elements, 7.5 parts of concentrated sulfuric acid, 1.5 parts of urea solution, 0.7 part of p-hydroxyphenylglycine salt and 1.5 parts of polycondensed ammonium phosphate according to mass ratio;
wherein the chelating agent is EDDHA-Na; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper chloride and copper sulfate; the zinc element is zinc sulfate and zinc chloride; the manganese element is manganese chloride; the boron element is borax; the iron element is ferric oxalate;
the mass concentration of the concentrated sulfuric acid is 92.2%; the mass concentration of the urea solution is 94.5%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
Dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 62%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 60 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the material A is subjected to granulation operation for 10s, and the spray temperature is 74 ℃, so that the chelating property of the ammonium polyphosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5min of granulation operation, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 78%;
s4, drying:
Drying the granular material A at 80 ℃ for 40min, wherein the water content of the dried granules is 1.3%, and the emulsion magnesium sulfate in the granules is dried to form anhydrous magnesium sulfate;
S5, post-treatment:
screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is 1000:2.5:4.5.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the potato field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelating fertilizer of the invention is applied at a rate of 150 kg/mu, and the yield of potatoes per mu is 2096 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is carried out with 150 kg/mu and the yield of potatoes per mu is 1645 kg. Compared with the prior art, the chelated fertilizer has the advantages of increasing the yield by 451 kg per mu and good fertility effect.
Example 5
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 32 parts of ammonium salt, 24 parts of phosphate fertilizer, 14 parts of potash fertilizer, 0.45 part of chelating agent, 5.5 parts of light burned magnesium powder, 0.45 part of trace elements, 6.5 parts of concentrated sulfuric acid, 1.8 parts of urea solution, 0.9 part of p-hydroxyphenylglycine salt and 2.5 parts of polycondensed ammonium phosphate according to mass ratio;
wherein the chelating agent is HEDP; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper carbonate and copper chloride; the zinc element is zinc chloride; the manganese element is manganese chloride and manganese sulfate; the boron element is borax; the iron element is ferric chloride;
the mass concentration of the concentrated sulfuric acid is 92.6%; the mass concentration of the urea solution is 95.5%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 64%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulating, wherein the temperature in the granulator is 55 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the granulating operation of the material A is 14s, and the spray temperature is 78 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after granulating operation is carried out for 6min, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 90%;
s4, drying:
drying the granular material A at 110 ℃ for 30min, wherein the water content of the dried granules is 1.4%, and the emulsion magnesium sulfate in the granules is dried to form anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:3:5.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the corn field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelated fertilizer of the invention is applied at a rate of 50 kg/mu and the yield of corn per mu is 795 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is carried out by 50 kg/mu, the urea is applied for 10 kg/mu in the large bell mouth period, and the corn mu yield is 688 kg. Compared with the prior art, the chelated fertilizer has the advantages of increasing yield by 107 kg per mu and good fertility effect.
Example 6
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
weighing 26 parts of ammonium salt, 28 parts of phosphate fertilizer, 16 parts of potash fertilizer, 0.3 part of chelating agent, 5.2 parts of light burned magnesium powder, 0.5 part of trace elements, 7 parts of concentrated sulfuric acid, 2.2 parts of urea solution, 1 part of p-hydroxyphenylglycine salt and 2.5 parts of polycondensed ammonium phosphate according to the mass ratio;
Wherein the chelating agent is EDTMPS; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper chloride and copper sulfate; the zinc element is zinc sulfate; the manganese element is manganese sulfate; the boron element is borax; the iron element is ferric chloride and ferric oxalate;
the mass concentration of the concentrated sulfuric acid is 92.4%; the mass concentration of the urea solution is 95.8%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 66%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 60 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the material A is subjected to granulation operation for 10s, and the spray temperature is 72 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5min of granulation operation, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 82%;
s4, drying:
drying the granular material A at 100 ℃ for 40min, wherein the water content of the dried granules is 1.25%, and the emulsion magnesium sulfate in the granules is dried to form anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:2.5:4.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the potato field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelated fertilizer of the invention is applied at a rate of 150 kg/mu, and the yield of potatoes per mu is 2115 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is carried out with 150 kg/mu and the yield of potatoes per mu is 1645 kg. Compared with the prior art, the yield of the chelated fertilizer is 470 kg per mu, and the fertility effect is good.
Example 7
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
34 parts of ammonium salt, 26 parts of phosphate fertilizer, 18 parts of potash fertilizer, 0.35 part of chelating agent, 5 parts of light burned magnesium powder, 0.3 part of trace elements, 6 parts of concentrated sulfuric acid, 2 parts of urea solution, 0.8 part of p-hydroxyphenylglycine salt and 2 parts of polycondensed ammonium phosphate are weighed according to the mass ratio;
wherein the chelating agent is EDDHA-Na and HEDP; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper carbonate; the zinc element is zinc chloride; the manganese element is manganese chloride and manganese sulfate; the boron element is borax; the iron element is ferric oxalate;
The mass concentration of the concentrated sulfuric acid is 92.8%; the mass concentration of the urea solution is 94.8%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 68%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulating, wherein the temperature in the granulator is 55 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the granulating operation of the material A is 12s, and the spray temperature is 75 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after granulating operation is carried out for 6min, so that a granular material A is obtained, the granulating size is 2-5 mm, and the granulating balling rate is 86%;
s4, drying:
drying the granular material A at 105 ℃ for 40min, wherein the water content of the dried granules is 0.95%, and the emulsion magnesium sulfate in the granules is dried to form anhydrous magnesium sulfate;
S5, post-treatment:
screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:3:4.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the corn field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The yield per mu of corn is 788 kg when the chelated fertilizer of the invention is applied to 50kg per mu. And (3) comparing 50 kg/mu of common fertilizer (15-15-15S compound fertilizer) with 10 kg/mu of urea and 662 kg of corn mu yield in the large bell mouth period. Compared with the prior art, the chelated fertilizer has the advantages of increasing yield by 126 kg per mu and good fertility effect.
Example 8
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 30 parts of ammonium salt, 25 parts of phosphate fertilizer, 24 parts of potash fertilizer, 0.45 part of chelating agent, 4.5 parts of light burned magnesium powder, 0.45 part of trace elements, 6.5 parts of concentrated sulfuric acid, 1.8 parts of urea solution, 0.6 part of p-hydroxyphenylglycine salt and 1.5 parts of polycondensed ammonium phosphate according to mass ratio;
wherein the chelating agent is HEDP and EDTMPS; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is at least one of copper chloride and copper sulfate; the zinc element is zinc chloride; the manganese element is manganese chloride; the boron element is borax; the iron element is ferric chloride;
the mass concentration of the concentrated sulfuric acid is 92.5%; the mass concentration of the urea solution is 95%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
Dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 65%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 58 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the material A is subjected to granulation operation for 12s, and the spray temperature is 70 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5.5min of granulation operation, so as to obtain a granular material A, wherein the granulating size is 2-5 mm, and the granulating balling rate is 75%;
s4, drying:
Drying the granular material A at 90 ℃ for 50min, wherein the water content of the dried granules is 1.1%, and the emulsion magnesium sulfate in the granules is dried into anhydrous magnesium sulfate;
S5, post-treatment:
screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is anti-caking powder=1000:3:4.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the potato field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelated fertilizer of the invention is applied at a rate of 150 kg/mu, and the yield of potatoes per mu is 2115 kg. The control fertilization of the common compound fertilizer (15-15-15S compound fertilizer) is 150 kg/mu, and the yield of potatoes per mu is 1648 kg. Compared with the prior art, the chelated fertilizer has the advantages of increasing yield by 467 kg per mu and good fertility effect.
Example 9
A preparation method of a chelated fertilizer for improving the chelating ability of trace elements in a compound fertilizer comprises the following steps:
s1, preparing:
Weighing 35 parts of ammonium salt, 25 parts of phosphate fertilizer, 22 parts of potash fertilizer, 0.4 part of chelating agent, 5.5 parts of light burned magnesium powder, 0.35 part of trace elements, 7.5 parts of concentrated sulfuric acid, 2.2 parts of urea solution, 0.8 part of p-hydroxyphenylglycine salt and 2 parts of polycondensed ammonium phosphate according to mass ratio;
Wherein the chelating agent is EDDHA-Na and EDTMPS; the microelements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is copper carbonate and copper sulfate; the zinc element is zinc chloride; the manganese element is manganese chloride and manganese sulfate; the boron element is borax; the iron element is ferric chloride;
the mass concentration of the concentrated sulfuric acid is 92.6%; the mass concentration of the urea solution is 95.6%;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 66%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
Delivering the material A into a granulator for granulation, wherein the temperature in the granulator is 56 ℃, spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of the granulator in a spray mode after the granulation operation of the material A is 14 seconds, and the spray temperature is 80 ℃, so that the chelating property of the polycondensed ammonium phosphate and microelements is improved; then spraying the mixed solution B into an inner material bed of a granulator in a spraying mode, wherein the spraying temperature is 100 ℃, so that light burned magnesium powder reacts with sulfuric acid, emulsion magnesium sulfate is generated under the action of steam and the mixed solution B, and the emulsion magnesium sulfate is magnesium sulfate with different crystal water, and reaction heat is discharged; granulating is completed after 5.5min of granulation operation, so as to obtain a granular material A, wherein the granulating size is 2-5 mm, and the granulating balling rate is 85%;
s4, drying:
drying the granular material A at 95 ℃ for 45min, wherein the water content of the dried granules is 1%, and the emulsion magnesium sulfate in the granules is dried into anhydrous magnesium sulfate;
S5, post-treatment:
Screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm; the coating is that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent first, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is 1000:2.6:4.2.
The chelated fertilizer prepared by the method has good trace element chelating effect, no phenomena of particle cracking, pulverization and caking occur in the storage and transportation process, and good fertility maintaining effect. The chelated fertilizer is subjected to fertilizer efficiency experiments, and the corn field of the experimental object has poor soil fertility, and trace elements are relatively deficient. The chelated fertilizer of the invention is applied at a rate of 50 kg/mu and the yield of corn per mu is 795 kg. The control fertilizer is applied with 50 kg/mu of common compound fertilizer (15-15-15S compound fertilizer), 10 kg/mu of urea is applied in the large bell mouth period, and the yield of corn per mu is 674 kg. As can be seen by comparison, the yield of the chelated fertilizer is increased by 121 kg per mu, and the fertility effect is good.
Claims (6)
1. The preparation method of the chelated fertilizer for improving the chelating ability of the trace elements of the compound fertilizer is characterized by comprising the following steps:
s1, preparing:
Weighing 25-35 parts of ammonium salt, 20-30 parts of phosphate fertilizer, 10-25 parts of potash fertilizer, 0.3-0.5 part of chelating agent, 4-6 parts of light burned magnesium powder, 0.3-0.5 part of trace elements, 6-8 parts of concentrated sulfuric acid, 1-2.5 parts of urea solution, 0.6-1 part of p-hydroxyphenylglycine salt and 1-3 parts of polycondensed ammonium phosphate according to mass ratio;
the chelating agent is at least one of EDDHA-Na, HEDP and EDTMPS;
S2, premixing:
Uniformly mixing ammonium salt, phosphate fertilizer, potash fertilizer and chelating agent to obtain a premix I; uniformly mixing light burned magnesium powder, trace elements and condensed ammonium phosphate to obtain a premix II; then uniformly mixing the premix I and the premix II to obtain a material A;
dissolving p-hydroxyphenylglycine salt in water to obtain a p-hydroxyphenylglycine salt water solution with the mass concentration of 60-70%;
mixing concentrated sulfuric acid and urea solution to obtain mixed solution B;
s3, granulating:
delivering the material A into a granulator for granulating, wherein the temperature in the granulator is 55-60 ℃, the granulating size is 2-5 mm after granulating, and the granulating balling rate is 75-90%; then spraying the p-hydroxyphenylglycine salt water solution into an inner material bed of a granulator in a spray mode; then spraying the mixed solution B into an inner material bed of a granulator in a spray mode, so that light burned magnesium powder reacts with sulfuric acid to generate milky magnesium sulfate, wherein the milky magnesium sulfate is magnesium sulfate with different crystal water;
The spraying method comprises the following steps: after granulating the material A for 8-15 s, spraying a p-hydroxyphenylglycine salt water solution, wherein the spraying temperature is 70-80 ℃; spraying the mixed solution B, and continuing granulating for 5-6 min at the spraying temperature of 100 ℃ to obtain a granular material A;
the temperature in the granulator is 55-60 ℃, the granulating size is 2-5 mm after granulating, and the granulating balling rate is 75-90%;
s4, drying:
and (3) drying the granular material A, wherein the water content of the dried granules is less than 1.5%, and at the moment, the milky magnesium sulfate in the granules is dried into anhydrous magnesium sulfate.
2. The method for preparing the chelated fertilizer for improving the chelating ability of the trace elements of the compound fertilizer according to claim 1, wherein in S1, the EDDHA-Na is ethylenediamine diphthalic sodium acetate, the HEDP is hydroxyethylidene diphosphonic acid, and the EDTMPS is ethylenediamine tetramethylene sodium phosphonate.
3. The method for preparing the chelated fertilizer for improving the chelating ability of the trace elements of the compound fertilizer according to claim 1, wherein in S1, the trace elements comprise copper element, zinc element, manganese element, boron element and iron element; the copper element is at least one of copper carbonate, copper chloride and copper sulfate; the zinc element is at least one of zinc sulfate and zinc chloride; the manganese element is at least one of manganese chloride and manganese sulfate; the boron element is borax; the iron element is at least one of ferric chloride and ferric oxalate;
The mass concentration of the concentrated sulfuric acid is 92-93%; the mass concentration of the urea solution is 94-96%.
4. The preparation method of the chelated fertilizer for improving the chelating ability of the trace elements of the compound fertilizer according to claim 1, wherein in the step S4, the drying temperature is 70-120 ℃, and the drying time is 30-50 min.
5. The method for preparing the chelated fertilizer for improving the chelating ability of trace elements in the compound fertilizer according to claim 1, further comprising the following steps of S5 post-treatment:
And screening, cooling and coating the dried granular material A to form finished granules, wherein the granule size is 2.5-4.5 mm.
6. The preparation method of the chelated fertilizer for improving the chelating ability of the trace elements in the compound fertilizer according to claim 5, wherein the coating is characterized in that the cooled granular material A enters a coating machine and is contacted with a liquid anti-caking agent firstly, so that the surfaces of the granules are uniformly coated with the liquid anti-caking agent; then mixing the powder with the anti-caking powder to uniformly wrap the surface of the particles with the anti-caking powder; the mass ratio of the granular material A to the liquid anti-caking agent is that the anti-caking powder is 1000:2-3:4-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211680374.3A CN115784796B (en) | 2022-12-27 | 2022-12-27 | Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211680374.3A CN115784796B (en) | 2022-12-27 | 2022-12-27 | Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115784796A CN115784796A (en) | 2023-03-14 |
| CN115784796B true CN115784796B (en) | 2024-07-05 |
Family
ID=85426856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211680374.3A Active CN115784796B (en) | 2022-12-27 | 2022-12-27 | Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115784796B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367137A (en) * | 2015-12-08 | 2016-03-02 | 沈阳化工研究院有限公司 | Multiple trace elements chelated fertilizer, and preparation method thereof |
| CN107892636A (en) * | 2017-12-22 | 2018-04-10 | 苗强 | A kind of more nutrient a great number of elements water-soluble fertilizer powder products and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085641C (en) * | 1998-02-25 | 2002-05-29 | 孙荣祥 | Multi-element chelate fertilizer and producing process thereof |
| CN104529623B (en) * | 2014-12-10 | 2017-10-27 | 中化化肥有限公司成都研发中心 | It is a kind of possess in trace element chelated ability agricultural ammonium polyphosphate and preparation method thereof |
| CN105399544A (en) * | 2015-12-25 | 2016-03-16 | 贵州省化工研究院 | Slow release composite fertilizer and preparation method thereof |
| GB201902612D0 (en) * | 2019-02-27 | 2019-04-10 | Vib Vzw | Novel plant growth promoting microbial composition |
-
2022
- 2022-12-27 CN CN202211680374.3A patent/CN115784796B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367137A (en) * | 2015-12-08 | 2016-03-02 | 沈阳化工研究院有限公司 | Multiple trace elements chelated fertilizer, and preparation method thereof |
| CN107892636A (en) * | 2017-12-22 | 2018-04-10 | 苗强 | A kind of more nutrient a great number of elements water-soluble fertilizer powder products and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115784796A (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mortvedt | Crop response to level of water-soluble zinc in granular zinc fertilizers | |
| CN103708964B (en) | Instant chelated solid water-soluble fertilizer | |
| CN104529674B (en) | A kind of humic acid special fertilizer for sweet potato and preparation method thereof | |
| CN100400476C (en) | Rhizosphere friendly fertilizer and its production method | |
| CN109928850A (en) | A kind of particle compound fertilizer and preparation method thereof of the phosphorus containing polymerization | |
| CN104557286A (en) | Efficient compound organic acid-based stable ecological fertilizer | |
| CN108218568A (en) | A kind of garlic special synergistic chelating fertilizer and preparation method thereof | |
| CN108191584B (en) | Special slow release fertilizer for watermelons and preparation method thereof | |
| CN106748527A (en) | A kind of production method of organic water-soluble fertilizer | |
| CN103193553A (en) | Production technology of water-soluble water retention drop irrigation slow release fertilizer | |
| CN104692949B (en) | It is a kind of suitable for nitrate-based compound fertilizer of planting fruit trees and preparation method thereof | |
| CN103224424B (en) | Sustained and controlled release composite fertilizer and preparation method thereof | |
| CN115784796B (en) | Preparation method of chelated fertilizer for improving chelating ability of trace elements in compound fertilizer | |
| CN111689805A (en) | Production method of compound fertilizer | |
| CN110963853A (en) | Wrapping layer, wrapping type stable fertilizer containing medium trace elements and provided with wrapping layer and preparation method of wrapping type stable fertilizer | |
| CN106397040A (en) | Multi-component high-activity humic acid water-soluble fertilizer special for vegetables and preparation method of multi-component high-activity humic acid water-soluble fertilizer | |
| CN110922277A (en) | Selenium-rich humic acid slow-release compound fertilizer for peanuts and preparation method thereof | |
| CN104725108A (en) | Formula of organic fertilizer for improving hardening of saline-alkali soil and grainy production | |
| CN101844950A (en) | Method for producing novel magnetic compound fertilizer | |
| CN105418201B (en) | A kind of particle boric magnesium fertilizer acid system exempts from drying preparation technology | |
| Mortvedt | Crop response to applied zinc in ammoniated phosphate fertilizers | |
| CN103030479A (en) | Controlled availability special BB fertilizer for cotton and preparation thereof | |
| CN1216832C (en) | Method for producing borium and magnesium fertilizer by using boric sludge | |
| CN106396987A (en) | Potassium chloride granular fertilizer and production method thereof | |
| CN109627094A (en) | A method of improving utilization rate of fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |