CN109809911A - Alkaline fertilizer and preparation method thereof - Google Patents
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- CN109809911A CN109809911A CN201711175550.7A CN201711175550A CN109809911A CN 109809911 A CN109809911 A CN 109809911A CN 201711175550 A CN201711175550 A CN 201711175550A CN 109809911 A CN109809911 A CN 109809911A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 162
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 45
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 26
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004202 carbamide Substances 0.000 claims abstract description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000004111 Potassium silicate Substances 0.000 claims abstract description 15
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 15
- 229910021538 borax Inorganic materials 0.000 claims abstract description 15
- 239000001110 calcium chloride Substances 0.000 claims abstract description 15
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 15
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 claims abstract description 15
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000001103 potassium chloride Substances 0.000 claims abstract description 15
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 15
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 15
- 229910052913 potassium silicate Inorganic materials 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 15
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 15
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 claims abstract description 15
- 239000010455 vermiculite Substances 0.000 claims abstract description 15
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 15
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 15
- 239000010457 zeolite Substances 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 34
- 238000005469 granulation Methods 0.000 claims description 20
- 230000003179 granulation Effects 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 17
- 239000004254 Ammonium phosphate Substances 0.000 claims description 14
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims description 14
- 235000019289 ammonium phosphates Nutrition 0.000 claims description 14
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000011247 coating layer Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 59
- 230000000694 effects Effects 0.000 abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 abstract description 17
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 27
- 239000000463 material Substances 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- HPIGCVXMBGOWTF-UHFFFAOYSA-N isomaltol Natural products CC(=O)C=1OC=CC=1O HPIGCVXMBGOWTF-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 235000015097 nutrients Nutrition 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012272 crop production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Fertilizers (AREA)
Abstract
Belong to technical field of fertilizers, and in particular to a kind of alkaline fertilizer and preparation method thereof.The alkaline fertilizer includes fertilizer master batch and the clad for being coated on fertilizer master batch surface；Wherein, the fertilizer master batch includes the component of following parts by weight: 32-43 parts of urea, 16-26 parts of calcium magnesium phosphate, 14-16 parts of potassium chloride, 0-6 parts of phosphorus ammonium, 0-1 parts of borax, 2-4 parts of potassium silicate, 0-4 parts of potassium hydroxide, 2-4 parts of potassium pyrophosphate, 2-4 parts of vermiculite, the first 1-2 parts of diatomite；The clad includes the component of following parts by weight: the second 0-2 parts of diatomite, and 7-12 parts of zeolite powder, 1-2 parts of calcium chloride.In the formula of alkaline fertilizer provided by the invention, by synergistic effect between each ingredient and content, the ideal alkaline effect of alkaline fertilizer was not only guaranteed, but also can adsorb to ammonia, and had been a kind of alkaline fertilizer without obvious smell, there is good practical application value.
Description
Technical Field
The invention belongs to the technical field of fertilizers, and particularly relates to an alkaline fertilizer and a preparation method thereof.
Background
The acidity and alkalinity of the fertilizer refers to the acidity and alkalinity of the fertilizer dissolved in water, and the fertilizer can be classified into chemical acidic fertilizer, chemical alkaline fertilizer and chemical neutral fertilizer according to the definition. The plants have the soil pH value range suitable for the plants, and the pH value range suitable for most plants is between 5.5 and 7.5; a large amount of fertilizer is dissolved in the liquid phase of the soil, so different soils can show different pH values, the development of plant root systems can be influenced by over-acid or over-alkali of the soil, different nutrients can be effectively reduced, the ecological environment in the soil can be damaged, the growth of crops can be hindered, and the balance of the soil can not be damaged as far as possible when the fertilizer is used. However, in the crop production process in China, chemical fertilizers such as nitrogen fertilizers and the like are often applied in excess for various reasons, and although high yield is obtained, a large amount of fertilizers are applied for a long time to acidify soil, so that alkaline fertilizers are needed for improvement.
The alkaline fertilizer in the prior art has weak alkalinity and even neutral alkalinity, so that the adjusting effect of the alkaline fertilizer on acid soil is weakened, and the prior alkaline fertilizer has obvious gases such as irritant ammonia gas and the like, so that the production environment and the satisfaction degree of consumers on products are worsened in the fertilizing process; meanwhile, the existing preparation method of the alkaline fertilizer has complex process and high difficulty in producing the alkaline fertilizer, so that the production cost is increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides an alkaline fertilizer and a preparation method thereof, and aims to solve the technical problems that the existing alkaline fertilizer has weak regulation effect on acid soil, has pungent smell and is high in production cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an alkaline fertilizer, which comprises a fertilizer master batch and a coating layer coated on the surface of the fertilizer master batch; wherein,
the fertilizer master batch comprises the following components in parts by weight: 32-43 parts of urea, 16-26 parts of calcium magnesium phosphate fertilizer, 14-16 parts of potassium chloride, 0-6 parts of ammonium phosphate, 0-1 part of borax, 2-4 parts of potassium silicate, 0-4 parts of potassium hydroxide, 2-4 parts of potassium pyrophosphate, 2-4 parts of vermiculite and 1-2 parts of first diatomite;
the coating comprises the following components in parts by weight: 0-2 parts of second diatomite, 7-12 parts of zeolite powder and 1-2 parts of calcium chloride.
The invention also provides a preparation method of the alkaline fertilizer, which comprises the following steps:
weighing raw materials of the components according to the components and the content of the alkaline fertilizer;
mixing the urea, the calcium magnesium phosphate fertilizer, the potassium chloride, the ammonium phosphate, the borax, the potassium silicate, the potassium hydroxide, the potassium pyrophosphate, the vermiculite and the first diatomite, and then carrying out disc granulation to obtain the fertilizer master batch;
and mixing the fertilizer master batch with the second diatomite, the zeolite powder and the calcium chloride, and then coating and granulating to obtain the alkaline fertilizer.
The alkaline fertilizer provided by the invention comprises the following components in fertilizer master batches: the urea, the calcium magnesium phosphate fertilizer and the potassium chloride are used as basic nutrients of conventional elements of the fertilizer, and the urea also has the function of a binder, so that the fertilizer master batches are agglomerated and are not easy to disperse; potassium silicate and potassium pyrophosphate are used as alkaline reagents for regulating pH, so that the alkaline function of the fertilizer is maintained, vermiculite and first diatomite are used as soil regulators, ammonia gas can be absorbed, trace elements can be provided for the soil, and the effects of moisturizing the soil, loosening the soil and prolonging the pesticide and fertilizer effect time are achieved; meanwhile, when the soil is in a phosphorus deficiency state, ammonium phosphate can be added into the master batch fertilizer, when the soil is in a boron deficiency state, borax can be added into the master batch fertilizer, and when the soil needs to be adjusted by a stronger alkaline fertilizer, potassium hydroxide can be added to be used as a strong alkaline regulator, so that the adjustment can be carried out according to the actual requirement of the soil, and the effect of improving the soil can be better achieved. In the coating layer of the alkaline fertilizer, zeolite powder is used for carrying out physical adsorption on ammonia gas, calcium chloride is used for carrying out chemical adsorption on the ammonia gas, the coating layer can effectively remove the ammonia gas, so that the alkaline fertilizer has no obvious smell, and if a certain amount of second diatomite is added, the coated coating layer has a better ammonia removal effect. In a word, in the formula of the alkaline fertilizer provided by the invention, through synergistic effect of all components and contents, the ideal alkaline effect of the alkaline fertilizer is ensured, ammonia gas can be adsorbed, and the alkaline fertilizer is an alkaline fertilizer without obvious odor and has good practical application value.
The preparation method of the alkaline fertilizer provided by the invention comprises the steps of firstly carrying out disc granulation on required nutrients, alkaline reagents for regulating PH and reagents for absorbing ammonia gas added internally in a disc granulation mode, then carrying out coating granulation by using coating materials for carrying out physical adsorption and chemical adsorption on ammonia gas, and achieving the effect of adsorbing ammonia gas through internal addition and external coating. The preparation method has the advantages of simple process, easily controlled conditions and low production cost. The alkaline fertilizer obtained by the preparation method not only ensures the ideal alkaline effect of the alkaline fertilizer, but also can adsorb ammonia gas, thereby producing the alkaline fertilizer without obvious odor and improving the production value of the alkaline fertilizer.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below 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.
On one hand, the embodiment of the invention provides an alkaline fertilizer, which comprises a fertilizer master batch and a coating layer coated on the surface of the fertilizer master batch; wherein,
the fertilizer master batch comprises the following components in parts by weight: 32-43 parts of urea, 16-26 parts of calcium magnesium phosphate fertilizer, 14-16 parts of potassium chloride, 0-6 parts of ammonium phosphate, 0-1 part of borax, 2-4 parts of potassium silicate, 0-4 parts of potassium hydroxide, 2-4 parts of potassium pyrophosphate, 2-4 parts of vermiculite and 1-2 parts of first diatomite;
the coating comprises the following components in parts by weight: 0-2 parts of second diatomite, 7-12 parts of zeolite powder and 1-2 parts of calcium chloride.
The alkaline fertilizer provided by the embodiment of the invention comprises the following components in fertilizer master batches: the urea, the calcium magnesium phosphate fertilizer and the potassium chloride are used as basic nutrients of conventional elements of the fertilizer, and the urea also has the function of a binder, so that master batches are agglomerated and are not easy to disperse; potassium silicate and potassium pyrophosphate are used as alkaline reagents for regulating pH, so that the alkaline function of the fertilizer is maintained, vermiculite and first diatomite are used as soil regulators, ammonia gas can be absorbed, trace elements can be provided for the soil, and the effects of moisturizing the soil, loosening the soil and prolonging the pesticide and fertilizer effect time are achieved; meanwhile, when the soil is in a phosphorus deficiency state, ammonium phosphate can be added into the master batch fertilizer, when the soil is in a boron deficiency state, borax can be added into the master batch fertilizer, and when the soil needs to be adjusted by a stronger alkaline fertilizer, potassium hydroxide can be added to be used as a strong alkaline regulator, so that the adjustment can be carried out according to the actual requirement of the soil, and the effect of improving the soil can be better achieved. In the coating layer of the alkaline fertilizer, zeolite powder is used for physically adsorbing ammonia gas, and calcium chloride is used for chemically adsorbing ammonia gas, so that the coating layer can effectively remove ammonia gas, the alkaline fertilizer has no obvious odor, and if a certain amount of second diatomite is added, the coated coating layer has a better ammonia removal effect. In a word, in the formula of the alkaline fertilizer provided by the embodiment of the invention, through synergistic effect of the components and the contents, the ideal alkaline effect of the alkaline fertilizer is ensured, ammonia gas can be adsorbed, and the alkaline fertilizer is an alkaline fertilizer without obvious odor and has good practical application value.
Further, in the alkaline fertilizer of the embodiment of the invention, the mass ratio of the fertilizer master batch to the coating layer is (4-12): 1. the quality of the fertilizer master batch and the coating layer can be adjusted according to actual needs, and within the mass ratio range, the comprehensive performance of the alkaline fertilizer with the alkaline effect and the ammonia adsorption effect reaches the best.
Further, in the alkaline fertilizer of the embodiment of the present invention, the particle size of the alkaline fertilizer is 2 to 5 mm. The particle size of the alkaline fertilizer can be adjusted according to actual needs, and the alkaline fertilizer has the best stability and convenient fertilization within the particle size range of 2-5 mm.
On the other hand, the embodiment of the invention also provides a preparation method of the alkaline fertilizer, which comprises the following steps:
s01: weighing raw materials of the components according to the components and the content of the alkaline fertilizer;
s02: mixing the urea, the calcium magnesium phosphate fertilizer, the potassium chloride, the ammonium phosphate, the borax, the potassium silicate, the potassium hydroxide, the potassium pyrophosphate, the vermiculite and the first diatomite, and then carrying out disc granulation to obtain the fertilizer master batch;
s03: and mixing the fertilizer master batch with the second diatomite, the zeolite powder and the calcium chloride, and then coating and granulating to obtain the alkaline fertilizer.
According to the preparation method of the alkaline fertilizer provided by the embodiment of the invention, firstly, required nutrients, alkaline reagents for regulating PH and reagents for absorbing ammonia gas added in are granulated in a disc granulation mode, then, coating granulation is carried out by utilizing a coating material for carrying out physical adsorption and chemical adsorption on ammonia gas, and the effect of adsorbing ammonia gas is achieved by internal addition and external coating. The preparation method has the advantages of simple process, easily controlled conditions and low production cost. In a word, the alkaline fertilizer prepared by the preparation method disclosed by the embodiment of the invention not only ensures the ideal alkaline effect of the alkaline fertilizer, but also can adsorb ammonia gas, so that the alkaline fertilizer without obvious odor is produced, and the production value of the alkaline fertilizer is improved.
Further, in step S01, the raw materials of the components of the alkaline fertilizer formulation are all commercially available.
Further, in the step S02, the rotation speed of the disk granulation is 10 to 14rpm, and the rotation speed of the envelope granulation is 10 to 14 rpm. The disc granulation is carried out within the speed range of 10-14rpm, so that the components in the fertilizer master batch can be mixed more uniformly; and (3) performing coating granulation in the speed range of 10-14rpm, wherein the coating is uniform and has the best coating effect, and a coating layer with better ammonia absorption effect can be obtained. Further, in a preferred embodiment, the disc granulation is completed in a disc granulator, and the coating granulation is completed in a fertilizer coating machine.
Further, in the method for preparing an alkaline fertilizer provided by the embodiment of the present invention, after the coating granulation is completed, a drying treatment step is further included. The alkaline fertilizer obtained after drying treatment has stable efficiency and long storage time. Further preferably, the temperature of the drying treatment is 30 to 50 ℃. Drying is carried out within the temperature range, the drying effect is good, and the pesticide effect of the fertilizer cannot be lost.
Further, in the preparation method of the alkaline fertilizer provided by the embodiment of the invention, the particle size of the obtained alkaline fertilizer is 2-5 mm. The alkaline fertilizer has the best stability and convenient fertilization within the particle size range of 2-5 mm.
The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.
Example 1
An alkaline fertilizer, the preparation method comprises the following steps:
the preparation method comprises the steps of selecting 33 parts of urea, 26 parts of calcium magnesium phosphate fertilizer, 16 parts of potassium chloride, 0 part of agricultural ammonium phosphate, 1 part of borax, 2 parts of potassium silicate, 0 part of potassium hydroxide, 2 parts of potassium pyrophosphate, 4 parts of vermiculite, 2 parts of diatomite and the like to produce alkaline fertilizer master batches, mixing, coating and granulating 1 part of diatomite, 1 part of calcium chloride, 12 parts of zeolite powder and the like as coating materials, and drying and granulating.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Example 2
An alkaline fertilizer, the preparation method comprises the following steps:
the method comprises the steps of selecting 38 parts of urea, 18 parts of calcium magnesium phosphate fertilizer, 15 parts of potassium chloride, 6 parts of agricultural ammonium phosphate, 1 part of borax, 3 parts of potassium silicate, 4 parts of potassium hydroxide, 3 parts of potassium pyrophosphate, 2 parts of vermiculite, 1 part of diatomite and the like to produce alkaline fertilizer master batches, mixing, coating and granulating 1 part of diatomite, 2 parts of calcium chloride, 6 parts of zeolite powder and the like as coating materials, and drying and granulating.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Example 3
An alkaline fertilizer, the preparation method comprises the following steps:
the method comprises the steps of selecting 37 parts of urea, 19 parts of calcium magnesium phosphate fertilizer, 15 parts of potassium chloride, 3 parts of agricultural ammonium phosphate, 1 part of borax, 2 parts of potassium silicate, 2 parts of potassium hydroxide, 2 parts of potassium pyrophosphate, 4 parts of vermiculite, 2 parts of diatomite and the like to produce alkaline fertilizer master batches, mixing, coating and granulating 1 part of diatomite, 1 part of calcium chloride, 11 parts of zeolite powder and the like as coating materials, and drying and granulating.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Example 4
An alkaline fertilizer, the preparation method comprises the following steps:
43 parts of urea, 19 parts of calcium magnesium phosphate fertilizer, 14 parts of potassium chloride, 6 parts of agricultural ammonium phosphate, 1 part of borax, 2 parts of potassium silicate, 0 part of potassium hydroxide, 3 parts of potassium pyrophosphate, 4 parts of vermiculite, 2 parts of diatomite and the like are selected to produce alkaline fertilizer master batches, 1 part of diatomite, 1 part of calcium chloride, 10 parts of zeolite powder and the like are used as coating materials, and the coating materials are mixed, coated, granulated, dried and granulated.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Example 5
An alkaline fertilizer, the preparation method comprises the following steps:
the method comprises the steps of selecting 37 parts of urea, 18 parts of calcium magnesium phosphate fertilizer, 14 parts of potassium chloride, 6 parts of agricultural ammonium phosphate, 1 part of borax, 3 parts of potassium silicate, 3 parts of potassium hydroxide, 3 parts of potassium pyrophosphate, 3 parts of vermiculite, 1 part of diatomite and the like to produce alkaline fertilizer master batches, mixing, coating and granulating 1 part of diatomite, 2 parts of calcium chloride, 8 parts of zeolite powder and the like as coating materials, and drying and granulating.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Example 6
An alkaline fertilizer, the preparation method comprises the following steps:
the preparation method comprises the steps of selecting 33 parts of urea, 18 parts of calcium magnesium phosphate fertilizer, 14 parts of potassium chloride, 6 parts of agricultural ammonium phosphate, 1 part of borax, 3 parts of potassium silicate, 4 parts of potassium hydroxide, 3 parts of potassium pyrophosphate, 4 parts of vermiculite, 1 part of diatomite and the like to produce alkaline fertilizer master batches, mixing, coating and granulating 1 part of diatomite, 2 parts of calcium chloride, 10 parts of zeolite powder and the like as coating materials, and drying and granulating.
Weighing 5g of finished alkaline particles, mixing and dissolving the alkaline particles according to the solid-liquid ratio of 1:5, measuring the pH value, selecting 50kg of alkaline fertilizer, sealing and storing for 10 days and 30 days, and respectively detecting the ammonia concentration by using a Hima ammonia detector, wherein the results are shown in Table 1.
Performance testing
The data of the results of the tests on the alkaline fertilizers obtained in examples 1-6 above are shown in Table 1 below.
TABLE 1
As can be seen from the experimental data in Table 1, the pH value of the alkaline fertilizer is adjusted by adjusting the adding amount of the alkaline agent, the ammonia gas does not smell the smell of the ammonia gas basically when the ammonia gas amount is below 10ppm according to the ammonia gas concentration standard, and the ammonia gas amount of all products in the experiment is less than 10ppm within thirty days, so that the pungent smell of the ammonia gas cannot be smelled, therefore, the alkaline fertilizer product prepared by the embodiment of the invention is the alkaline fertilizer without obvious smell, and the alkaline effect is good.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An alkaline fertilizer is characterized by comprising a fertilizer master batch and a coating layer coated on the surface of the fertilizer master batch; wherein,
the fertilizer master batch comprises the following components in parts by weight: 32-43 parts of urea, 16-26 parts of calcium magnesium phosphate fertilizer, 14-16 parts of potassium chloride, 0-6 parts of ammonium phosphate, 0-1 part of borax, 2-4 parts of potassium silicate, 0-4 parts of potassium hydroxide, 2-4 parts of potassium pyrophosphate, 2-4 parts of vermiculite and 1-2 parts of first diatomite;
the coating comprises the following components in parts by weight: 0-2 parts of second diatomite, 7-12 parts of zeolite powder and 1-2 parts of calcium chloride.
2. The alkaline fertilizer as claimed in claim 1, wherein the mass ratio of the fertilizer master batch to the coating layer is (4-12): 1.
3. the alkaline fertilizer according to claim 1, wherein the particle size of said alkaline fertilizer is 2 to 5 mm.
4. The preparation method of the alkaline fertilizer is characterized by comprising the following steps:
weighing raw materials of the components according to the components and the content thereof contained in the alkaline fertilizer of claim 1 or 2;
mixing the urea, the calcium magnesium phosphate fertilizer, the potassium chloride, the ammonium phosphate, the borax, the potassium silicate, the potassium hydroxide, the potassium pyrophosphate, the vermiculite and the first diatomite, and then carrying out disc granulation to obtain the fertilizer master batch;
and mixing the fertilizer master batch with the second diatomite, the zeolite powder and the calcium chloride, and then coating and granulating to obtain the alkaline fertilizer.
5. The method of producing an alkaline fertilizer as claimed in claim 4, wherein the alkaline fertilizer has a particle size of 2 to 5 mm.
6. The method of producing an alkaline fertilizer as claimed in claim 4, wherein the rotation speed of the disk granulation is 10 to 14 rpm.
7. The method of producing an alkaline fertilizer as claimed in claim 4, wherein the coating granulation is performed at a rotation speed of 10 to 14 rpm.
8. The method of claim 4, wherein the disc granulation is performed in a disc granulator and the coating granulation is performed in a fertilizer coating machine.
9. The method of producing an alkaline fertilizer as claimed in any one of claims 4 to 8, further comprising a drying step after the completion of the granulation of the coating film.
10. The method for producing an alkaline fertilizer as claimed in claim 9, wherein the temperature of the drying treatment is 30 to 50 ℃.
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