LU504968B1 - Preparation method of a compound fertilizer with water and fertilizer retention function - Google Patents

Preparation method of a compound fertilizer with water and fertilizer retention function Download PDF

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Publication number
LU504968B1
LU504968B1 LU504968A LU504968A LU504968B1 LU 504968 B1 LU504968 B1 LU 504968B1 LU 504968 A LU504968 A LU 504968A LU 504968 A LU504968 A LU 504968A LU 504968 B1 LU504968 B1 LU 504968B1
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LU
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Prior art keywords
fertilizer
preparation
water
compound fertilizer
synergist
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LU504968A
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French (fr)
Inventor
Ying Zhan
Jianlin Wei
Yaoping Ding
Dehua Wu
Zhaohui Liu
Xiaobin Wu
Wenqi Han
Feng Gu
Qing Zhang
Deshui Tan
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Shandong Acad Of Agricultural Sciences
Shandong Zhifeng Fertilizer Group Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80—Soil conditioners
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Soil Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

The invention relates to a preparation method of a compound fertilizer with water and fertilizer retention functions, which comprises: fertilizer raw material, filler and synergist, wherein the synergist is vermiculite powder with a particle size of 200-400 meshes, accounting for 5-10% of the weight of the compound fertilizer, and the filler is bentonite; According to the invention, vermiculite powder, bentonite and fertilizer raw materials are compounded, then are conveyed to a rotary drum granulator, and saturated steam is introduced for granulation at the same time, so that a compound fertilizer with strong water absorption and water retention performance and long fertilizer effect is obtained, and the compound fertilizer has small bulk density, good air permeability, low material cost and easy popularization and use.

Description

DESCRIPTION LU504968
PREPARATION METHOD OF A COMPOUND FERTILIZER WITH WATER AND
FERTILIZER RETENTION FUNCTION
TECHNICAL FIELD
The invention relates to a preparation method of a compound fertilizer with water and fertilizer retention functions, and belongs to the technical field of fertilizers.
BACKGROUND
Chemical fertilizer is one of the important material inputs in agricultural production.
According to the statistics of Food and Agriculture Organization of the United Nations (FAO), chemical fertilizer accounts for more than half of the contribution to crop production. The application of chemical fertilizer plays an important role in ensuring the effective supply of agricultural products. China has a large population, and the cultivated land area is relatively scarce. It is necessary to ensure food security by improving the yield and efficiency per unit area.
Applying chemical fertilizer is one of the most effective measures to increase agricultural production in the past, present and future. Because chemical fertilizer is easy to decompose and lose, it can't be absorbed and utilized by crops in time, and its utilization rate is low, how to reduce nutrient loss of fertilizer and improve fertilizer utilization rate has become an urgent problem at present. At the same time, China is facing a serious problem of water resources. The distribution of water resources in time and space is extremely uneven, and water resources are extremely short. How to make the most economical and reasonable use of limited water resources and improve the efficiency of agricultural water use has also become an urgent problem in current agricultural production.
Fertilizer with water and fertilizer retention function is an effective way to solve the problems of low utilization rate of water resources and fertilizer. At present, organic compounds such as polymer resin are mostly used as water-retaining or fertilizer-retaining agents to achieve the function of water-retaining and fertilizer-retaining. The production process is relatively complicated and the stability is poor, which greatly increases the production cost of fertilizer and greatly limits its application in production. LU504968
China patent document CN 104098381A discloses a water-retaining and yield-increasing slow-release compound fertilizer, The fertilizer is prepared from the following raw materials in parts by weight: 10-15 diatomaceous earth with 1250-2000 meshes, 5-6 calcium chloride, 4-5 sodium borate, 18-20 potassium citrate, 23-25 urea, 20-25 diammonium phosphate, 15-18 fermentation broth of crop leftovers, 4-5 plasma of livestock, 10-12 vinegar residue, 1-3 egg shell powder, 2-3 cleavers, 1-2 toosendan seed powder, 2-3 soybean peptide powder, 6-8 parts of earthworm excrement, 4-5 dry ears of corn, 1-2 sodium methylparaben, 10-12 cross-linked polyvinylpyrrolidone, 3-4 methyl methacrylate, 4-5 butyl acrylate, 1-2 sodium dodecyl benzene sulfonate, 0.1-0.2 ammonium persulfate, 2-4 medical stone powder, 6-8 ferric polysilicate sulfate and 4-5 auxiliaries. The compound fertilizer prepared by the invention uses diatomaceous earth and slow-release coating agent to form double coating on nutrients, so that the nutrients are not easy to lose, the fertilizer efficiency is more lasting, and the compound fertilizer has the water-retaining and drought-resistant abilities, can meet the nutrients required by the growth of crops at all stages, and does not destroy the soil ecological environment. China patent document
CN101113119A discloses a water-retaining fertilizer and a preparation method thereof. The water-retaining fertilizer is compounded by 90-99wt% of cationic superabsorbent resin and 1-10wt% of chelated nutrient solution. The superabsorbent resin is a copolymer formed by cationic polyacrylic acid-acrylamide. In the cationic superabsorbent resin, a copolymer is formed by acrylic acid, acrylamide and cationic compounds, each monomer accounts for 5-40wt% of acrylic acid, 5-40wt% of acrylamide, 0.01-5wt% of cationic monomer and the balance of deionized water. The invention introduces a new cationic monomer in the preparation of water-absorbent resin, which improves the water absorption of water-retaining materials. China patent document CN103589436A discloses a soil water and fertilizer retaining agent, which contains the following raw materials by weight: 15-35wt% of carboxymethyl cellulose, 35-55wt% of amylopectin, 10-25wt% of Artemisia sphaerocephala seed gum and 5-20wt% of brown sugar.
The invention introduces carboxymethyl cellulose (CMC), which has strong water absorption and long-term moisturizing stability in mud. CN 106045669A discloses a compound fertilizer and a preparation method thereof, which comprises a chemical fertilizer and a synergist, wherein the synergist is amino acid modified organopolysiloxane emulsion.
Therefore, there is an urgent need for a compound fertilizer with strong water retention ark 004968 long-term fertilizer effect without organic compounds such as polymer resin.
SUMMARY
Aiming at the shortcomings of the prior art, the invention provides a preparation method of a compound fertilizer with water and fertilizer retention functions. The compound fertilizer obtained by the invention has strong water absorption and water retention performance and long fertilizer efficiency.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The invention relates to a preparation method of a compound fertilizer with water and fertilizer retention functions, which comprises: fertilizer raw material, filler and synergist, wherein the synergist is vermiculite powder with a particle size of 200-400 meshes, accounting for 5-10% of the weight of the compound fertilizer, and the filler is bentonite;
The preparation method of the compound fertilizer with water and fertilizer retention function comprises the following steps: 1) Raw materials are weighed according to the proportion, crushed and evenly mixed for later use; 2) Conveying the powdery mixture to a rotary drum granulator, and introducing saturated steam at the same time, so as to improve the temperature and viscosity of the material, increase the salt solubility of the granulated material, achieve the quantity of liquid phase meeting the granulation needs of the material under the condition of low moisture content, and reduce the thermal energy consumption in the drying process; The temperature of saturated steam is 140°C-160°C and the pressure is 0.35MPa-0.6MPa; 3) Conveying the primary granulated product to a rotary dryer for drying; 4) Conveying the dried primary granulated product to a thermal screening machine for sorting, and directly returning the fine particles to a rotary drum granulator to continue granulating; 5) Conveying the screened semi-finished particles to a rotary cooler, cooling by natural cold air or forced cold air, and crushing the large particles by a pulverizer and returning to a rotary drum granulator to continue to participate in granulation. LU504968
According to the invention, it is preferred that the particle size of vermiculite powder is 200-400 mesh.
More preferably, the particle size of vermiculite powder is 300-400 mesh.
According to the invention, it is preferred that the synergist accounts for 8-10% of the compound fertilizer by weight.
According to the invention, it is preferred that the filler accounts for 5-20% of the compound fertilizer by weight.
According to the invention, it is preferred that the particle size of bentonite is 100-200 meshes.
According to the invention, it is preferred that the raw material of the chemical fertilizer is one or a mixture of two or more of urea, ammonium sulfate, ammonium chloride, monoammonium phosphate, calcium superphosphate, potassium sulfate or potassium chloride.
Vermiculite is a plate-like natural clay mineral, which is formed by hydrothermal alteration and later weathering of ultrabasic complex and has renewable characteristics. The chemical composition of vermiculite can be roughly expressed by [Mg 3 (Si 3 AI)O 10 (OH) 2 ][Mg 0.5 (H 2 O)y], which is a layered magnesium-containing aluminosilicate. Its basic structural unit is composed of two layers of silicate (a small amount of aluminate) tetrahedron sandwiched with a layer of magnesium-containing octahedron, forming a "sandwich" silicate skeleton, and there is hydration between the skeleton and the skeleton. The existence of these exchangeable cations and water molecules makes it have strong ion exchange ability. The vermiculite powder with a particle size of 200-400 meshes has high ion exchange, water absorption, plasticity and viscosity, which is convenient for fertilizer pelletization. When applied to soil, it can keep water and fertilizer nutrients.
Bentonite takes montmorillonite as the main mineral component, and its structure is a 2:1 crystal structure composed of two silicon-oxygen tetrahedrons sandwiched by an aluminum-oxygen octahedron. The main chemical components are silicon dioxide, aluminum trioxide and water, which has strong hygroscopicity and expansibility, can be dispersed into gelatinous and suspended forms in water medium, and has certain viscosity, thixotropy and lubricity, which is convenient for fertilizer pelletization. Because there are some cations in the layered structure formed by montmorillonite cell, it is easy to be exchanged by other cations ar 204968 has good ion exchange. When applied to soil, it can keep water and fertilizer nutrients.
According to the invention, vermiculite powder, bentonite and fertilizer raw materials are compounded, then are conveyed to a rotary drum granulator, and saturated steam is introduced for granulation at the same time, so that a compound fertilizer with strong water absorption and water retention performance and long fertilizer effect is obtained, and the compound fertilizer has small bulk density, good air permeability, low material cost and easy popularization and use.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be further illustrated with embodiments.
Embodiment 1:
The invention relates to a compound fertilizer with water and fertilizer retention functions, which comprises a chemical fertilizer raw material, a filler and a synergist; The raw materials of chemical fertilizer include urea (containing N 46%), monoammonium phosphate (containing N 11%, P:O5s 44%) and potassium chloride (containing KO 60%), the filler is bentonite, and the synergist is vermiculite powder. The components by weight are as follows:
The preparation method comprises the following steps: 1) Raw materials are weighed according to the proportion, crushed and evenly mixed for later use; 2) Conveying the powdery mixture to a rotary drum granulator, and introducing saturated steam at the same time, so as to improve the temperature and viscosity of the material, increase the salt solubility of the granulated material, achieve the quantity of liquid phase meeting the granulation needs of the material under the condition of low moisture content, and reduce the thermal energy consumption in the drying process; The temperature of saturated steam is 150°C and the pressure is 0.5MPa; 3) Conveying the primary granulated product to a rotary dryer for drying; 4) Conveying the dried primary granulated product to a thermal screening machine for sorting, and directly returning the fine particles to a rotary drum granulator to continue granulating; 5) Conveying the screened semi-finished particles to a rotary cooler, cooling by natural cold air or forced cold air, and crushing the large particles by a pulverizer and returning to a rotaty’ 504968 drum granulator to continue to participate in granulation. The compound fertilizer with the function of water and fertilizer retention is obtained, and the mass percentage of nitrogen, phosphorus and potassium is 15:15:15, which is a balanced compound fertilizer with the function of water and fertilizer retention suitable for various crops.
Embodiment 2:
The invention relates to a compound fertilizer with water and fertilizer retention functions, which comprises a chemical fertilizer raw material, a filler and a synergist; The raw materials of chemical fertilizer include urea (containing N 46%), monoammonium phosphate (containing N 11%, P:O5s 44%) and potassium chloride (containing KO 60%), the filler is bentonite, and the synergist is vermiculite powder. The components by weight are as follows:
The preparation method comprises the following steps: 1) Raw materials are weighed according to the proportion, crushed and evenly mixed for later use; 2) Conveying the powdery mixture to a rotary drum granulator, and introducing saturated steam at the same time, so as to improve the temperature and viscosity of the material, increase the salt solubility of the granulated material, achieve the quantity of liquid phase meeting the granulation needs of the material under the condition of low moisture content, and reduce the thermal energy consumption in the drying process; The temperature of saturated steam is 160°C and the pressure is 0.6MPa; 3) Conveying the primary granulated product to a rotary dryer for drying; 4) Conveying the dried primary granulated product to a thermal screening machine for sorting, and directly returning the fine particles to a rotary drum granulator to continue granulating; 5) Conveying the screened semi-finished particles to a rotary cooler, cooling by natural cold air or forced cold air, and crushing the large particles by a pulverizer and returning to a rotary drum granulator to continue to participate in granulation. The compound fertilizer with water and fertilizer retention function is obtained, and the mass percentage of nitrogen, phosphorus and potassium is 26:8:6, which is a high-nitrogen compound fertilizer with water and fertilizer retention function suitable for nitrogen-loving crops (such as corn).
Application experiment: LU504968
In order to verify the product effect of the technology of the invention, indoor pot experiment and field experiment are carried out on the fertilizer of the embodiment of the invention and common commercial fertilizer.
Pot experiment is conducted in Jinan, Shandong Province in June, 2021. Three treatments are set, CK treatment (no fertilization) and control. JP treatment (40kg/mu of common commercial compound fertilizer with nutrient content of 26-8-6) and XP treatment (40kg/mu of compound fertilizer with water and fertilizer retention function in Embodiment 2 of the present invention). Set 3 repetitions, a total of 9 pots. The test basin is a ceramic basin with a diameter of 20cm and a height of 25cm. Each basin is filled with 13kg of air-dried soil. When loading the soil, the corresponding fertilizer is added and mixed evenly according to the treatment design, and then lightly compacted, and each basin is watered for 1L. Except for fertilizer application, other treatment measures are consistent. Soil moisture content is measured on the 7th, 14th, 21st and 28th day after watering. The results are as follows:
Table 1 Changes of soil moisture content under different fertilization treatments one wr Je lm wm fer ele
From the results, it can be seen that the compound fertilizer with water and fertilizer retention function prepared by the technology of the invention has obvious water retention effect compared with the common compound fertilizer.
The field experiment is conducted in Wangcheng Station Village, Hujia Street, Laoling City,
Shandong Province from June to October, 2021. This area belongs to warm temperate semi-humid continental monsoon climate with four distinct seasons, with an average annual temperature of 12.4°C and an average annual precipitation of 527. 1mm. The soil type of the experimental plot is fluvo-aquic soil, and the content of organic matter in the topsoil is 11.4g/kg, available nitrogen is 58.7mg/kg, available phosphorus is 18.2mg/kg and available potassium is
116.1mg/kg. The previous crop is wheat, the tested crop is corn, and the variety is denghai 605. LU504968
The experiment adopted random block design and set up three treatments, CK treatment (no fertilization) and control. JP treatment (40kg/mu of common commercial compound fertilizer with nutrient content of 26-8-6) and XP treatment (40kg/mu of compound fertilizer with water and fertilizer retention function of the embodiment of the present invention with nutrient content of 26-8-6) are repeated for three times. The residential area is 40m”. The experiment is carried out on June 12th, with sowing row spacing of 70cm and plant spacing of 25cm. When sowing, the seeds and fertilizers are sown at the same time, and the fertilizers are applied at one time, and no topdressing is required at the later stage. Except for fertilizer application, other management measures are consistent. Corn is harvested on October 2nd, and the yield and yield components are investigated. The results are as follows:
Table 2 Ear row number, number of kernels per row, 1000-grain weight and yield of corn under different treatments
Treatment | Ear row | Kernels 100 grain | Yield Increase Increase number per row | weight (g) | (kg/mu) production | production (rows) (granules) compared | compared to CK | to JP (%) (%) ow me ie wwe ws me Jen fm we Jw [oer Jor Ja
From the corn yield results, the corn yield treated by applying the compound fertilizer with the function of water and fertilizer retention in the embodiment of the invention is obviously improved, which is 5.4% higher than that of the common compound fertilizer with the same nutrient input. The compound fertilizer with the function of water and fertilizer retention improves the utilization efficiency of water and fertilizer nutrients, coordinates the relationship between the components of corn yield and improves corn yield.
The above-mentioned embodiments of the present invention are only embodiments fh 504968 clearly explaining the present invention, and are not limited to the embodiments of the present invention.
For those skilled in the art, other changes or changes in different forms can be made on the basis of the above description.
All embodiments cannot be exhaustive here.
All the obvious changes or changes caused by the technical scheme of the present invention are still within the scope of protection of the present invention.

Claims (7)

CLAIMS LU504968
1. À preparation method of a compound fertilizer with water and fertilizer retention function, which comprises: fertilizer raw material, filler and synergist, wherein the synergist is vermiculite powder with a particle size of 200-400 meshes, accounting for 5-10% of the weight of the compound fertilizer, and the filler is bentonite; the preparation method of the compound fertilizer with water and fertilizer retention function comprises the following steps: 1) raw materials are weighed according to the proportion, crushed and evenly mixed for later use; 2) conveying the powdery mixture to a rotary drum granulator, and introducing saturated steam at the same time, so as to improve the temperature and viscosity of the material, increase the salt solubility of the granulated material, achieve the quantity of liquid phase meeting the granulation needs of the material under the condition of low moisture content, and reduce the thermal energy consumption in the drying process; the temperature of saturated steam is 140°C-160°C and the pressure is 0.35MPa-0.6MPa; 3) conveying the primary granulated product to a rotary dryer for drying; 4) conveying the dried primary granulated product to a thermal screening machine for sorting, and directly returning the fine particles to a rotary drum granulator to continue granulating; 5) conveying the screened semi-finished particles to a rotary cooler, cooling by natural cold air or forced cold air, and crushing the large particles by a pulverizer and returning to a rotary drum granulator to continue to participate in granulation.
2. The preparation method according to claim 1, characterized in that the particle size of vermiculite powder is 200-400 mesh.
3. The preparation method according to claim 1, characterized in that the particle size of vermiculite powder is 300-400 mesh.
. . . qe . | 1504968
4. The preparation method according to claim 1, characterized in that the synergist accoun for 8-10% of the compound fertilizer by weight.
5. The preparation method according to claim 1, characterized in that the filler accounts for 5-20% of the compound fertilizer by weight.
6. The preparation method according to claim 1, characterized in that the particle size of bentonite is 100-200 meshes.
7. The preparation method according to claim 1, characterized in that the raw material of the chemical fertilizer is one or a mixture of two or more of urea, ammonium sulfate, ammonium chloride, monoammonium phosphate, calcium superphosphate, potassium sulfate or potassium chloride.
LU504968A 2022-05-25 2023-05-22 Preparation method of a compound fertilizer with water and fertilizer retention function LU504968B1 (en)

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CN1267383C (en) * 2003-03-10 2006-08-02 铜陵化学工业集团有限公司 Pelleting process for composite manure
CN1644569A (en) * 2004-12-23 2005-07-27 安徽农业大学 Ecological drought resistant and water retaining compound fertilizer and production thereof
CN102503696A (en) * 2011-11-10 2012-06-20 上海化工研究院 Preparation method for particle compound fertilizer
CN104761387A (en) * 2015-04-13 2015-07-08 中国热带农业科学院橡胶研究所 Water-retaining and slowly-release compound fertilizer and preparation method thereof
CN105461467A (en) * 2016-02-01 2016-04-06 段长林 Fertilizer special for spring corn in Weibei region
CN106397070A (en) * 2016-11-24 2017-02-15 周岩 Compound water retaining slow release fertilizer and production method thereof
CN108314575A (en) * 2018-01-15 2018-07-24 大连亚泰科技新材料股份有限公司 It is a kind of to absorb water, be retained complex mineral fertilizer and preparation method
CN114804959A (en) * 2022-05-25 2022-07-29 山东省农业科学院 Preparation method of compound fertilizer with water retention and fertilizer retention functions

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