JP2008247653A - Method of manufacturing granular fertilizer composition and granular fertilizer composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method or the like of a granular fertilizer composition by which the high grade granular fertilizer composition is manufactured with a small number of steps. <P>SOLUTION: The method of manufacturing the granular fertilizer composition containing two or more kinds of coated granular fertilizers is characterized in that a coating film is provided on granular fertilizer raw materials while or after mixing two or more granular fertilizer raw materials. Because it is needless to carry out a coating process for each granular fertilizer raw material and respective granular fertilizer raw materials are coated as a whole by only once coating process, the required number of steps is reduced to be suitable for industrial manufacture. Because the coating process is carried out at the end, the probability of the occurrence of coating defects in the final product is remarkably made low even when the coated granular fertilizer raw materials are rubbed with each other in the mixing process. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a granular fertilizer composition, and a granular fertilizer composition, and more specifically, a method for producing a granular fertilizer composition capable of producing a high-quality granular fertilizer composition with fewer steps, In addition, the present invention relates to a granular fertilizer composition obtainable by the method.

  Amid the recent decline in the agricultural working population and the aging and increasing scale, the surface of granular fertilizer is covered with resin, etc., and the elution of fertilizer components is controlled to increase utilization efficiency and labor saving in additional fertilization work. The importance of coated granular fertilizers that enable this is increasing. Generally, the coated granular fertilizer has a structure in which a water-permeable coating is provided on the surface of the granular fertilizer serving as a mother nucleus. And various coated granular fertilizers having a desired fertilizer component, fertilization duration, elution pattern, and the like can be obtained by appropriately selecting the type of granular fertilizer, the material of the coating, the thickness of the coating, and the like. A typical material for the coating is a resin.

  In order to achieve more diverse duration of fertilization and elution patterns, granular fertilizers (granular fertilizer compositions) in which two or more types of granular fertilizers are mixed and combined have been developed. Patent Document 1 discloses a paddy rice fertilizer in which a plurality of fertilizer brands are combined. This fertilizer for paddy rice is a combination of a plurality of types of granular urea having different coverage, and the coating is made of an alkyd resin.

  Moreover, in order to provide a desired characteristic, adding another component to a coating or granular fertilizer is also performed. Patent Document 2 discloses a coated granular fertilizer in which a hydrophobic compound such as wax is contained in a granular fertilizer or a thermosetting resin coating for the purpose of imparting slow action (also referred to as delayed action).

About the manufacturing method and manufacturing apparatus of a covering granular fertilizer, it is based on the jet method (for example, patent documents 3) which makes a covering material adhere and dry, making a fertilizer particle flow as a jet, and the thing by a concrete mixer type rolling device (for example, Patent Document 4) is a typical example.
Japanese Patent Laid-Open No. 5-105569 JP 2000-44377 A Japanese Patent Laid-Open No. 2002-362991 JP 2005-89258 A

  As a method of producing a granular fertilizer composition in which two or more kinds of granular fertilizers are mixed and combined, a method of preparing each granular fertilizer to be combined in advance and finally mixing these granular fertilizers is adopted. Yes. The same applies to the case where the granular fertilizer is a coated granular fertilizer provided with a coating made of resin or the like. However, when producing a granular fertilizer composition containing two or more kinds of coated granular fertilizers by this method, there are various problems. For example, since it is necessary to prepare each coated granular fertilizer in advance, the process of preparing each coated granular fertilizer becomes independent and it is difficult to make the process common. Therefore, the more types of coated granular fertilizer to be mixed, the more types and amounts of coated granular fertilizer to be stocked, which is disadvantageous in terms of industrial production. In addition, there is a problem that the coated granular fertilizer rubs in the final mixing step and the probability that a coating defect occurs in the final product is increased.

  An object of the present invention is to provide a method for producing a granular fertilizer composition that is suitable for industrial production and that can produce a higher quality granular fertilizer composition.

  Invention of Claim 1 for solving an above-mentioned subject is a manufacturing method of the granular fertilizer composition containing two or more types of coated granular fertilizers, or mixing two or more types of granular fertilizer materials, or After mixing, it is a manufacturing method of the granular fertilizer composition characterized by providing a covering to the granular fertilizer raw material.

  The present invention relates to a method for producing a granular fertilizer composition containing two or more kinds of coated granular fertilizers, and the two or more kinds of granular fertilizer raw materials are mixed or mixed and then coated on the granular fertilizer raw materials. It is characterized by providing. That is, in the manufacturing method of the granular fertilizer composition of this invention, a coating process is performed simultaneously with the mixing process of a granular fertilizer raw material, or after completion | finish of a mixing process. In the manufacturing method of the granular fertilizer composition of this invention, it is not necessary to perform a coating process for every granular fertilizer raw material, and it coat | covers with respect to each granular fertilizer raw material in one coating process. Therefore, the number of necessary processes is small and it is particularly suitable for industrial production. Moreover, in the manufacturing method of the granular fertilizer composition of this invention, since a coating process is performed at the end, even if coated granular fertilizers are rubbed in a mixing process, the probability that a coating defect will arise in a final product will become very low.

  The “composition” in the present invention is a concept including a uniform mixture, and the “granular fertilizer composition” includes a uniform mixture of a plurality of types of granular fertilizers.

  Here, the “granular fertilizer raw material” refers to a granular fertilizer that is used as a raw material for the coated granular fertilizer that constitutes the granular fertilizer composition, and to which a coating is provided. All granular fertilizers can be directly used as raw materials for granular fertilizers as long as the coating is provided.

  In the present invention, “two or more types of granular fertilizer raw materials” are used, and the types of granular fertilizer raw materials are distinguished by differences in fertilizer components, amounts, particle sizes, and the like. About the kind of coated granular fertilizer in "two or more kinds of coated granular fertilizer" which the granular fertilizer composition manufactured by this invention contains, in addition to the difference of the fertilizer component mentioned above, the difference in quantity, the difference in particle size, etc. They are distinguished by differences in coating materials, thicknesses, coverage, differences in the number of layers (single layer or multiple layers), and the like.

  The invention according to claim 2 is the method for producing a granular fertilizer composition according to claim 1, wherein at least one of the granular fertilizer raw materials is an uncoated granular fertilizer raw material.

  With this configuration, it is possible to produce a granular fertilizer composition containing at least one type of coated granular fertilizer provided with a single layer coating. Here, “uncoated granular fertilizer raw material” refers to a granular fertilizer raw material made of uncoated granular fertilizer. That is, an uncoated granular fertilizer raw material is synonymous with a mother nucleus.

  The invention according to claim 3 is the method for producing a granular fertilizer composition according to claim 1 or 2, wherein at least one of the granular fertilizer raw materials is a coated granular fertilizer raw material.

  With this configuration, a granular fertilizer composition containing at least one type of coated granular fertilizer provided with a coating composed of a plurality of layers can be produced. Here, “coated granular fertilizer raw material” refers to a granular fertilizer raw material made of coated granular fertilizer.

  The invention according to claim 4 is characterized in that at least two kinds of granular fertilizer raw materials are coated granular fertilizer raw materials, and the coated granular fertilizer raw materials have different coating thicknesses. It is a manufacturing method of the granular fertilizer composition.

  With this configuration, a granular fertilizer composition containing two or more types of coated granular fertilizers having different coating thicknesses can be produced.

  Invention of Claim 5 provides the coating which consists of the raw material same as the raw material of the covering which a covering granular fertilizer raw material has with respect to the said covering granular fertilizer raw material, The granular fertilizer of Claim 3 or 4 characterized by the above-mentioned. It is a manufacturing method of a composition.

  With such a configuration, it is possible to produce a granular fertilizer composition containing a coated granular fertilizer provided with a plurality of coating layers made of the same material.

  The invention according to claim 6 is a granular fertilizer composition according to claim 3 or 4, characterized in that a coating made of a material different from the coating material of the coated granular fertilizer raw material is provided on the coated granular fertilizer raw material. It is a manufacturing method of a thing.

  With such a configuration, a granular fertilizer composition containing a coated granular fertilizer provided with a plurality of layers of coatings made of different materials can be produced.

  The invention according to claim 7 is the granular fertilizer composition according to any one of claims 3 to 6, wherein the coating material of the coated granular fertilizer raw material is a thermosetting resin or a thermoplastic resin. It is a manufacturing method.

  The invention according to claim 8 is the granular material according to any one of claims 1 to 7, wherein the coating material provided for the granular fertilizer raw material is a thermosetting resin or a thermoplastic resin. It is a manufacturing method of a fertilizer composition.

  With such a structure, it contains a coated granular fertilizer provided with a coating having excellent characteristics of a thermosetting resin or a thermoplastic resin, and further a coating combining the characteristics of both a thermosetting resin and a thermoplastic resin. A granular fertilizer composition can be produced.

  The thermosetting resin is at least one selected from the group consisting of urethane resin, urea resin, alkyd resin, epoxy resin, unsaturated polyester resin, phenol resin, urea / melamine resin, urea resin, and silicon resin. A configuration is recommended (claim 9). A configuration in which the thermoplastic resin is at least one selected from the group consisting of polyolefin, polyester, vinyl polymer, diene polymer, polyolefin copolymer, and vinyl chloride copolymer is also recommended. Item 10).

  Invention of Claim 11 is a manufacturing method of the granular fertilizer composition in any one of Claims 1-10, wherein the fertilizer component of a granular fertilizer raw material is 1 type.

  With such a configuration, it is possible to produce a granular fertilizer composition containing coated granular fertilizers having one type of fertilizer component and different types of coating (thickness, material, etc.).

  Invention of Claim 12 is a manufacturing method of the granular fertilizer composition in any one of Claims 1-10 characterized by the fertilizer component of a granular fertilizer raw material being 2 or more types.

  With such a configuration, a granular fertilizer composition containing two or more types of coated granular fertilizers having different fertilizer components can be produced.

  A configuration in which at least one of the fertilizer components is urea is recommended (claim 13).

  Invention of Claim 14 is a manufacturing method of the granular fertilizer composition in any one of Claims 1-13 which repeats the process which provides a coating | cover with respect to a granular fertilizer raw material twice or more. .

  With this configuration, it is possible to produce a granular fertilizer composition containing a coated granular fertilizer provided with a plurality of layers of coatings made of a desired material and thickness.

  Invention of Claim 15 is a granular fertilizer composition which can be obtained by the manufacturing method of the granular fertilizer composition in any one of Claims 1-14.

  The present invention relates to a granular fertilizer composition, and can be obtained by the method for producing a granular fertilizer composition of the present invention. In the granular fertilizer composition of the present invention, since there are very few coating defects, various fertilization durations and elution patterns can be reliably realized, and fertilizer components can be more suitably supplied to crops. It becomes.

  According to the granular fertilizer composition of the present invention, since the coating is collectively provided for each granular fertilizer raw material in a single coating process, the number of necessary processes is small and it is particularly suitable for industrial production. Moreover, since the coating process is performed last, even if the coated granular fertilizers are rubbed together in the mixing process, the probability that a coating defect will occur in the final product is extremely low.

  Since the granular fertilizer composition of the present invention has very few coating defects, it can reliably realize various fertilization durations and elution patterns, and more suitably supply fertilizer components to crops. It becomes possible.

Hereinafter, the best mode for carrying out the present invention will be described.
One aspect of the present invention is a method for producing a granular fertilizer composition containing two or more types of coated granular fertilizers, and while mixing or mixing two or more types of granular fertilizer raw materials, It is a manufacturing method of the granular fertilizer composition characterized by providing a coating | cover with respect. That is, the method for producing a granular fertilizer composition of the present invention includes a mixing step of mixing two or more types of granular fertilizer raw materials and a coating step of providing a coating on the granular fertilizer raw materials, or simultaneously with the mixing step or The coating step is performed after the mixing step.

  As a method for performing the mixing step, a known method used for the mixing operation of the powder fluid can be employed as it is. For example, two or more types of granular fertilizer raw materials may be mixed using a typical mixer such as a V-type mixer or a double cone mixer. On the other hand, as a technique for performing the coating process, a known technique used for the coating operation of the granular fertilizer can be employed as it is, and for example, any of a pan coating method and a fluid coating method can be used. . In addition, as disclosed in the above-mentioned Patent Document 3 (Japanese Patent Laid-Open No. 2002-362991) and Japanese Patent Laid-Open No. 10-158084, a method using a jet method in which a coating material is attached and dried while flowing fertilizer particles as a jet. A method using a concrete mixer type rolling device as disclosed in Patent Document 4 (Japanese Patent Laid-Open No. 2005-89258), or an inclined pan type as disclosed in Japanese Patent Laid-Open No. 9-208355. According to the technique of adding resin and forming a resin film on the surface of the granular fertilizer while rolling the granular fertilizer with a constant particle size by the rotation of the stirring device itself using a rolling granulator Since a coating process can be performed simultaneously with a process, it is suitable for implementing the manufacturing method of the granular fertilizer composition of this invention.

  The coating process may be performed only once, but may be repeated twice or more. Thereby, the coating consisting of a plurality of layers can be provided. At this time, if the same material is used every time, a coating having a desired thickness can be provided. On the other hand, if the coating material is changed in the middle, a coating made of a plurality of types of materials can be provided, which is useful for exhibiting various elution patterns.

  In addition, what is necessary is just to prepare with the general granulation technique about the granular fertilizer raw material used for a mixing process and a coating process, and you may use the commercially available coated granular fertilizer and uncoated granular fertilizer as it is.

  The granular fertilizer raw material used in the present invention may be either an uncoated granular fertilizer raw material or a coated granular fertilizer raw material. More specifically, two or more types of granular fertilizer raw materials may be composed of only uncoated granular fertilizer raw materials, or may be composed of only coated granular fertilizer raw materials. Furthermore, you may comprise two or more types of granular fertilizer raw materials combining both an uncoated granular fertilizer raw material and a coated granular fertilizer raw material.

  In one embodiment, at least two types of granular fertilizer raw materials are coated granular fertilizer raw materials, and the coated granular fertilizer raw materials have different coating thicknesses. For example, a granular fertilizer composition can be produced by using two or more types of coated granular fertilizer raw materials having different coating thicknesses and providing a coating on these coated granular fertilizer raw materials. In the present embodiment, two or more kinds of coated granular fertilizer raw materials that are different from each other in addition to the thickness of the coating may be used.

  In the embodiment in which the coated granular fertilizer raw material is employed as the granular fertilizer raw material, a coating made of the same material as the coating material of the coated granular fertilizer raw material can be provided on the coated granular fertilizer raw material. In this embodiment, a granular fertilizer composition provided with a plurality of layers of the same material can be produced. Conversely, a coating made of a material different from the coating material of the coated granular fertilizer material may be provided for the coated granular fertilizer material.

  There is no particular limitation on the coating of the coated granular fertilizer raw material to be used or the coating material provided on the granular fertilizer raw material, but a thermosetting resin or a thermoplastic resin is preferable. That is, in consideration of the properties of thermosetting resins and thermoplastic resins, a granular fertilizer composition that exhibits a desired elution pattern or the like can be produced by appropriately combining them.

  There is no limitation in particular as a thermosetting resin, A well-known thermosetting resin can be employ | adopted as it is. Examples of thermosetting resins include urethane resins, urea resins, alkyd resins, epoxy resins, unsaturated polyester resins, phenol resins, urea / melamine resins, urea resins, silicone resins, and the like. In addition, about a thermosetting resin, only 1 type may be used and it may be used in combination of 2 or more type.

  There is no limitation in particular as a thermoplastic resin, A well-known thermoplastic resin can be employ | adopted as it is. Examples of thermoplastic resins include polyolefins such as polyethylene, polypropylene, polybutene and polystyrene; polyesters such as thermoplastic polyesters; polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic acid, polymethacrylic acid, polyacrylic acid Vinyl polymers such as esters and polymethacrylates; butadiene polymers, isoprene polymers, chloroprene polymers, butadiene-styrene copolymers, ethylene-propylene-diene copolymers, diene systems such as styrene-isoprene copolymers Polymer: ethylene-propylene copolymer, butene-ethylene copolymer, butene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene -Metaact Polyolefin copolymers such as oxalate copolymer, ethylene-carbon monoxide copolymer, ethylene-vinyl acetate-carbon monoxide copolymer; vinyl chloride-vinyl acetate copolymer, vinylidene chloride-vinyl chloride copolymer And vinyl chloride copolymers such as products. In addition, about a thermoplastic resin, only 1 type may be used and it may be used in combination of 2 or more type.

  Only one type of fertilizer component of the granular fertilizer raw material to be used may be used, or two or more types may be used. The fertilizer component is not particularly limited, and commonly used components can be employed as they are, but those mainly containing nitrogen components are preferably employed. Specific examples of fertilizer components containing a nitrogen component include urea, ammonium nitrate, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate, sodium nitrate, calcium nitrate, potassium nitrate, lime nitrogen, formaldehyde processed urea fertilizer (UF), Examples include acetaldehyde-processed urea fertilizer (CDU), isobutyraldehyde-processed urea fertilizer (IBDU), guanine urea (GU), and urea is particularly preferably employed.

  Examples of fertilizer components other than the nitrogen component include phosphoric acid, potassium, silicic acid, magnesium, calcium, manganese, boron, iron and the like. Specifically, phosphate fertilizers such as superphosphate lime, heavy superphosphate, bitumen superphosphate, bitter phosphate, ammonium sulfate, potassium phosphate ammonium, ammonium phosphate phosphate; potassium chloride, potassium sulfate , Potassium fertilizer such as potassium sulfate, potassium sulfate, potassium bicarbonate and potassium phosphate; siliceous fertilizer such as calcium silicate; magnesium fertilizer such as magnesium sulfate and magnesium chloride; calcium such as quick lime, slaked lime and calcium carbonate Fertilizers; Manganese fertilizers such as manganese sulfate, sulfated sulfated manganese, and slag manganese; Boron fertilizers such as boric acid and borate; Including).

  In the method for producing a granular fertilizer composition of the present invention, the amount of coating provided on the granular fertilizer raw material is not particularly limited as long as the produced granular fertilizer composition can exhibit a desired fertilization effect, For example, if the final coating amount (the sum of the coating amount of the granular fertilizer raw material and the coating amount provided in the coating step) is 2 to 20% by weight relative to the amount of the mother nucleus, more specifically 5 What is necessary is just to provide so that it may exist in the range of 16 weight%. In general, if the amount of coating is too small, it is difficult to keep the coating thickness uniform, increasing the risk of causing coating defects. On the other hand, if the amount of the coating is too large, the amount of the fertilizer component is relatively decreased.

  In the method for producing a granular fertilizer composition of the present invention, the average particle size of the granular fertilizer raw material used in the mixing step and the coating step is not particularly limited. For example, the final average particle size of the coated granular fertilizer is 1 to What is necessary is just to select so that it may become in the range of 1-5 mm, more specifically 10 mm. One example of a criterion for selecting the particle size of the granular fertilizer raw material is a particle size at which two or more types of granular fertilizer raw materials are uniformly mixed and coated in the mixing step and the coating step.

  In the method for producing a granular fertilizer composition of the present invention, a granular fertilizer composition further containing various additives and the like can be produced. Examples of the additive include inorganic powders such as talc, calcium carbonate, and metal oxides; weather resistance improvers; colorants; binders, surfactants, and the like. These additives and the like may be contained in any of the mother core of the granular fertilizer raw material, the coating of the coated granular fertilizer raw material, and the coating provided in the coating step. Specifically, the granulation step, the mixing step, the coating step You may add at any of these processes.

  In the method for producing a granular fertilizer composition of the present invention, further components related to effects other than the growth of crops, for example, bioactive substances such as insecticides, herbicides, fungicides, plant growth regulators, organic fertilizers, etc. The granular fertilizer composition to contain can also be manufactured. These components may also be included in any of the parent of the granular fertilizer raw material, the coating of the coated granular fertilizer raw material, and the coating provided in the coating step. Specifically, the granulation step, the mixing step, and the coating step You may add in any process.

  Below, about the specific composition of the granular fertilizer composition which can be manufactured by the manufacturing method of the granular fertilizer composition of the present invention, the type of granular fertilizer raw material, the type of coating of the coated granular fertilizer raw material, and the coating provided in the coating step The explanation will be made in comparison with the combination of types. In the following examples, a, b, and c indicate the type of mother nucleus of the granular fertilizer material, and A and B indicate the type of coating. Further, the coated granular fertilizer or the coated granular fertilizer raw material provided with the coating A (single layer) on the surface of the mother nucleus a is “a / A”, and the coated granules in which the coating A is provided on the surface of the mother nucleus a. "A / AA" for fertilizer or coated granular fertilizer raw material, "a / AAA" for coated granular fertilizer or coated granular fertilizer raw material with three coatings A on the surface of mother nucleus a, coated on the surface of mother nucleus a A, a coated granular fertilizer or a coated granular fertilizer raw material in which a coating B is provided on the surface (outermost surface) of the coating A is expressed as “a / AB”. Simply “a” represents an uncoated granular fertilizer raw material consisting only of the mother nucleus a.

[Example 1]
As the granular fertilizer raw material, four types of “a” (uncoated granular fertilizer raw material) and “a / A”, “a / AA”, and “a / AAA” (all coated granular fertilizer raw materials) are selected. When coating A is applied to these granular fertilizer raw materials, a granular fertilizer composition containing four types of coated granular fertilizers “a / A”, “a / AA”, “a / AAA”, and “a / AAAAA” Can be manufactured.
In this example, at least two types of granular fertilizer raw materials are coated granular fertilizer raw materials (“a / A”, “a / AA” and “a / AAA”), and the coated granular fertilizer raw material has a coating thickness of This corresponds to an embodiment that is different from each other.

In addition, when manufacturing the granular fertilizer composition of this example by the conventional method, the frequency | count of a coating process increases and is complicated. That is, in the conventional method, the coating A is provided on the mother core “a”, and four types of coated granular fertilizers “a / A”, “a / AA”, “a / AAA”, and “a / AAAAA” are individually provided. Prepare and mix them last. The number of coating steps required at this time is
“A” → “a / A”: once “a” → “a / AA”: twice “a” → “a / AAA”: three times “a” → “a / AAAAA”: four times A total of 10 times. In actual production, if a process of providing a coating with a coverage of 1% in one coating process is combined and the coverage of coating A is set to 2%, the required number of times is doubled to 20 times.
On the other hand, in the method shown in this example, the number of coating steps necessary to prepare each granular fertilizer raw material is
“A”: 0 times “a” → “a / A”: 1 time “a” → “a / AA”: 2 times “a” → “a / AAA”: 3 times, while mixing these Or, after mixing, the final coating process is performed once. As a result, the total number of coating steps is 7, which is less than the conventional method (10 times). When actual production is performed under the above-described conditions, the number of coating steps is 14 in total, and the difference in the number of times with the conventional method (20 times) is further increased.

[Example 2]
Two types of coated granular fertilizer raw materials “a / A” and “a / B” are selected as granular fertilizer raw materials. When coating B is provided for these granular fertilizer raw materials, a granular fertilizer composition containing two types of coated granular fertilizers “a / AB” and “a / BB” can be produced.
Note that “a / AB” corresponds to a coating (B) made of a material different from the material of the coating (A) of the coated granular fertilizer material provided on the coated granular fertilizer material. “A / BB” corresponds to a coating (B) made of the same material as the coating (B) of the coated granular fertilizer material, provided on the coated granular fertilizer material.

[Example 3]
Three types of coated granular fertilizer raw materials “a / A”, “b / A”, and “c / A” are selected as the granular fertilizer raw materials. When coating A is provided for these granular fertilizer raw materials, a granular fertilizer composition containing three types of coated granular fertilizers “a / AA”, “b / AA”, and “c / AA” can be produced. it can.
If the mother cores a, b, and c have different fertilizer components, this example corresponds to an embodiment in which there are two or more fertilizer components of the granular fertilizer raw material.

[Example 4]
Three types of uncoated granular fertilizer raw materials “a”, “b”, and “c” are selected as the granular fertilizer raw materials. When coating A is provided for these granular fertilizer raw materials, a granular fertilizer composition containing three types of coated granular fertilizers “a / A”, “b / A”, and “c / A” can be produced. it can.
If the mother cores (uncoated granular fertilizer raw materials) a, b, and c have different fertilizer components, this example corresponds to an embodiment in which the fertilizer components of the granular fertilizer raw material are two or more.

[Example 5]
Three types of coated granular fertilizer raw materials “a / A”, “b / A”, and “c / A” are selected as the granular fertilizer raw materials. When coating B is provided for these granular fertilizer raw materials, a granular fertilizer composition containing three types of coated granular fertilizers “a / AB”, “b / AB”, and “c / AB” can be produced. it can.
If the mother cores a, b, and c have different fertilizer components, this example corresponds to an embodiment in which there are two or more fertilizer components of the granular fertilizer raw material.
In addition, “a / AB”, “b / AB”, and “c / AB” are all coated with a coating (B) made of a material different from the coating (A) of the coated granular fertilizer material. It corresponds to what was provided.

[Example 6]
Three types of “a” (uncoated granular fertilizer raw material) and “b / A” and “c / AA” (all coated granular fertilizer raw materials) are selected as the granular fertilizer raw material. When coating A is provided for these granular fertilizer raw materials, a granular fertilizer composition containing three types of coated granular fertilizers “a / A”, “b / AA”, and “c / AAA” can be produced. it can.
In this example, at least two types of granular fertilizer raw materials are coated granular fertilizer raw materials (“a / A” and “a / AA”), and the coated granular fertilizer raw materials have different coating thicknesses. Corresponds to form.
If the mother nuclei a, b, c are different from each other in fertilizer components, this example corresponds to an embodiment in which the fertilizer components of the granular fertilizer raw material are two or more types.

[Example 7]
Three types of “a” (uncoated granular fertilizer raw material) and “b / A” and “c / AA” (all coated granular fertilizer raw materials) are selected as the granular fertilizer raw material. When coating B is provided for these granular fertilizer raw materials, a granular fertilizer composition containing three types of coated granular fertilizers “a / B”, “b / AB”, and “c / AAB” can be produced. it can.
If the mother nuclei a, b, c are different from each other in fertilizer components, this example corresponds to an embodiment in which the fertilizer components of the granular fertilizer raw material are two or more types.
In addition, “b / AB” and “c / AAB” are both provided with a coating (B) made of a material different from the material of the coating (A) of the coated granular fertilizer material on the coated granular fertilizer material. Equivalent to.

  The other aspect of this invention is the granular fertilizer composition which can be obtained with the manufacturing method of the granular fertilizer composition of this invention mentioned above. About the granular fertilizer composition of this invention, it can specifically carry out with the same structure as embodiment concerning the manufacturing method of the granular fertilizer composition of this invention mentioned above.

Claims (15)

  A method for producing a granular fertilizer composition comprising two or more kinds of coated granular fertilizers, wherein two or more kinds of granular fertilizer raw materials are mixed or after mixing, and the granular fertilizer raw materials are provided with a coating. A method for producing a granular fertilizer composition.   The method for producing a granular fertilizer composition according to claim 1, wherein at least one of the granular fertilizer raw materials is an uncoated granular fertilizer raw material.   The method for producing a granular fertilizer composition according to claim 1 or 2, wherein at least one kind of the granular fertilizer raw material is a coated granular fertilizer raw material.   The method for producing a granular fertilizer composition according to claim 3, wherein at least two kinds of granular fertilizer raw materials are coated granular fertilizer raw materials, and the coated granular fertilizer raw materials have different coating thicknesses.   The method for producing a granular fertilizer composition according to claim 3 or 4, wherein a coating made of the same material as the coating material of the coated granular fertilizer material is provided on the coated granular fertilizer material.   5. The method for producing a granular fertilizer composition according to claim 3, wherein a coating made of a material different from the coating material of the coated granular fertilizer raw material is provided on the coated granular fertilizer raw material.   The method for producing a granular fertilizer composition according to any one of claims 3 to 6, wherein the coated raw material of the coated granular fertilizer raw material is a thermosetting resin or a thermoplastic resin.   The method for producing a granular fertilizer composition according to any one of claims 1 to 7, wherein the coating material provided for the granular fertilizer raw material is a thermosetting resin or a thermoplastic resin.   The thermosetting resin is at least one selected from the group consisting of urethane resin, urea resin, alkyd resin, epoxy resin, unsaturated polyester resin, phenol resin, urea / melamine resin, urea resin, and silicon resin. The method for producing a granular fertilizer composition according to claim 7 or 8, wherein the composition is present.   The thermoplastic resin is at least one selected from the group consisting of polyolefin, polyester, vinyl polymer, diene polymer, polyolefin copolymer, and vinyl chloride copolymer. The manufacturing method of the granular fertilizer composition of 7 or 8.   The fertilizer component of a granular fertilizer raw material is one type, The manufacturing method of the granular fertilizer composition in any one of Claims 1-10 characterized by the above-mentioned.   The fertilizer component of a granular fertilizer raw material is 2 or more types, The manufacturing method of the granular fertilizer composition in any one of Claims 1-10 characterized by the above-mentioned.   The method for producing a granular fertilizer composition according to claim 11 or 12, wherein at least one of the fertilizer components is urea.   The method for producing a granular fertilizer composition according to any one of claims 1 to 13, wherein the step of providing a coating on the granular fertilizer raw material is repeated twice or more.   The granular fertilizer composition which can be obtained by the manufacturing method of the granular fertilizer composition in any one of Claims 1-14.