JPH09157077A - Granular mixed fertilizer containing granular oyster shell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granular mixed fertilizer which consists of granular oyster shell, a granular phosphatic fertilizer, a granular magnesia fertilizer, a granular silica fertilizer and/or a granular humus fertilizer and has good underwater or underground degradability. SOLUTION: The production of this fertilizer comprises: finely crushing oyster shell into powder, adding a water-soluble binder to the powder, kneading and granulating the resulting mixture to obtain granular oyster shell; and mixing the granular oyster shell with one or more fertilizers selected from a granular phosphatic fertilizer, a granular magnesia fertilizer, a granular silica fertilizer and a granular humus fertilizer, in adequate amounts respectively to produce the objective granular mixed fertilizer. This fertilizer contains uniformly mixed fertilizer components and has good underwater or underground degradability and accordingly, is highly effective in plant growth and development.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a particle-mixed fertilizer which is composed of granular oyster shells and granular phosphate fertilizer, granular magnesia fertilizer, granular siliceous fertilizer and / or granular humus fertilizer with good disintegration in water and soil. It is about.

[0002]

Conventionally, as calcareous fertilizers, in addition to slaked lime and quick lime, bones and shells of cattle, pigs, chickens, fish and the like have been used. Slaked lime and quick lime are often used in powder form, but in this case, there is a drawback that powder of slaked lime and quick lime is easily scattered at the time of fertilization, and after fertilization, they are washed away by rainwater or they are ground. However, there are problems such as covering the ground to impede the water permeability and breathability of the ground, and blocking the sunlight from reaching the ground. After that, a method of granulating into particles having an appropriate size was tried in order to improve these problems, and specific proposals have already been made for slaked lime and quick lime. Among these, there is a method of adding slaked lime or deliquescent sodium salt, bentonite powder or plant foliate powder to perform granulation (JP-A-52-30663 and JP-A-60).
No. 221383, JP-A-1-226784), and a method of adding soluble silicic acid, a basic substance and phosphoric acid or an acidic phosphate to soluble lime (slaked lime, quick lime) and granulating them while reacting them has also been proposed (Japanese Patent Laid-Open No. 2002-242242). Showa 54-1234
69). Also, shells, especially oyster shells, are good calcareous fertilizers, but unlike slaked lime or quick lime, they are not easily soluble in water, and the effect as a fertilizer is slow. Was said to be good. So far, the granulation of oyster shells has hardly been studied, and no proposal has been made.

On the other hand, granulation of phosphoric acid fertilizer has been proposed and implemented so far in large numbers. Most of the granular phosphate fertilizers are granulated molten phosphorus fertilizers, and the granulated product or powder of molten phosphorus fertilizer is potassium silicate, alcohol fermentation waste liquid (molasses fermentation waste liquid), polyvinyl alcohol, lignic acid, soluble starch, monkeys. Bite such as phytopulp by-product (pulp waste liquor) and carboxymethyl cellulose (JP-A-53-58371, JP-A-57-14988)
No. 5, JP-A-58-20790) or magnesium sulfate (JP-A-60-65785), or a combination of waste molasses fermentation waste liquid or pulp waste liquid and alkaline earth metal hydrate (JP-A-58-20790). 58-185490). Furthermore, whether slow-acting nitrogen fertilizer and lime superphosphate or lime superphosphate are added to the molten phosphorus fertilizer (JP-A-52-6650,
There is also proposed a method of granulating by reacting phosphoric acid (JP-A-52-6651) or JP-A-60-122788. Granulation of magnesia fertilizer and siliceous fertilizer has not been published so far, but granulation using the same granulating agent as the above-mentioned phosphate fertilizer can be used. Further, there are very few proposals for granulation of humus fertilizer, and there is a method in which slag, which is a by-product during the refining of magnesium metal, and humic acid and phosphoric acid are mixed and granulated (Japanese Patent Laid-Open No. 23-23708).
2).

[0004]

As mentioned above, oyster shells have long been used by spraying coarsely crushed alone, or other fertilizers such as phosphate fertilizer, magnesia fertilizer, siliceous fertilizer, It was mixed with humus fertilizer and applied. However, powdered fertilizer has scattering of fertilizer during fertilization, and after fertilization, the fertilizer is washed away by rainwater, and the powdered fertilizer covers the ground to impede the water permeability and air permeability of the ground, or to the ground. Recently, problems such as blocking the sunlight exposure have been widely taken up, and fertilizers other than oyster shells have been granulated to an appropriate size as a remedy for these problems. As for oyster shells, coarsely crushed oyster shells were used as before, and since this also contains finely pulverized oyster shells, problems such as the above-mentioned powdered fertilizers are encountered. I will have it. In addition to that, even if this crushed oyster shell is mixed with other granulated granular fertilizer, oyster shells of different sizes will not be mixed uniformly in the fertilizer and will be unevenly distributed. There is a problem that even if the fertilizers are mixed, the fertilizer components cannot be evenly dispersed. It is important to granulate the fertilizer, not only during the production of the fertilizer but also the hardness that the particles do not break during the subsequent handling from distribution to fertilization, and the particle size is easy to handle. Is. Further, it is necessary that the particulate fertilizer is disintegrated in the soil at a moderate rate due to rain or moisture in the soil. In order to satisfy the conditions of these particulate fertilizers, various granulation methods have been proposed so far according to the type of fertilizer and the type of crop, and granulation of phosphate fertilizer, magnesia fertilizer and humus fertilizer has been proposed. The above technology has been completed as described above.

[0005]

The present invention has been accomplished as a result of earnest research on a method for granulating oyster shells and a granular fertilizer having an excellent effect as a fertilizer when mixed with the method. That is, according to the present invention, oyster shells are finely pulverized by a pulverizer, and a water-soluble binder is added and kneaded to granulate the resulting oyster shells to give granular phosphate fertilizer, granular magnesia fertilizer, granular silica. It is a particle-mixed fertilizer for granular oyster shells having good disintegration in water and soil, which is obtained by appropriately mixing at least one or more granular fertilizers selected from acid fertilizers and granular humus fertilizers. As the water-soluble binder used for granulating the oyster shell, generally, a stephen waste water concentrate, alcohol fermentation waste liquid, polyvinyl alcohol, soluble starch, lignic acid, carboxymethyl cellulose, sulfite pulp by-product, etc. However, for the purpose of the present invention, the lignin compound is the best in terms of easiness of granulation and disintegration in water and soil. Further, as the granular phosphate fertilizer of the present invention, a granular processed phosphate fertilizer consisting of molten phosphorus fertilizer, magnesia heavy burned phosphorus, etc. is contained in a well-balanced manner with the immediate-acting component and the delayed-acting component. It is preferable because it lasts for a long time and the quality of the granulated product is excellent.

On the other hand, as the granular magnesia fertilizer, magnesia hydroxide fertilizer, magnesium sulfate fertilizer, acetic acid magnesia fertilizer, humic acid magnesia fertilizer,
Granulated products consisting of processed fermented fertilizers, lignin fermented fertilizers, by-product fermented fertilizers, mixed fermented fertilizers, etc. can be used. It has a great effect on growth and is desirable. As the granular siliceous fertilizer, granulated products such as wollastonite fertilizer and mineral silicic acid fertilizer are used. In addition, the granular humus fertilizer is not particularly limited, and granulated products such as Azumin (trade name, manufactured by Nippon Heavy Chemical Industry Co., Ltd.) and Hyfumin (trade name), manufactured by Nippon Hoi Co., Ltd. can be used. Further, the shape of the granulated product is preferably a spherical shape having a diameter of 1 to 4 mm because mechanical spraying can be performed smoothly and disintegration after fertilization is appropriately performed. Granular oyster shells and other fertilizers,
That is, the mixing ratio of the granular phosphate fertilizer, the granular humus fertilizer and / or the granular magnesia fertilizer can be arbitrarily selected, but it is preferable that the granular fertilizer other than the granular oyster shell is contained in an amount of 5% or more based on the total weight. The fact that oyster shell granulation, which has been considered to be difficult to granulate until now, can be achieved by the present invention as described above can greatly contribute to the development of agriculture.

[0007]

As described above, according to the present invention, oyster shells are finely pulverized, and a water-soluble binder is added and kneaded to granulate the granulated oyster shells into granular phosphate fertilizer, granular magnesia fertilizer, granular siliceous material. The present invention succeeded in granulating the oyster shells with a fertilizer and / or a granular humus fertilizer mixed in appropriate amounts, so that a uniform fertilizer mixed particle fertilizer can be obtained and mechanical spraying becomes possible. The labor of severe fertilization, which is said to be 3K work, can be saved, and the labor of agriculture is greatly reduced. In addition, this fertilizer mixed with particles has a feature that after the fertilization, the particles easily disintegrate and are well dispersed in the soil, so that it is very effective for the growth of crops.

[0008]

Example 1 First, oyster shells were crushed into small pieces with a pulverizer and sieved to remove large pieces. Next, the oyster shells of the fine particles were charged into a blender, and 5% by weight of sodium lignate was added to the oyster shells and mixed well.
Further, as a result of charging this product in a granulator and granulating it while spraying water little by little, clean particles having a substantially circular shape with a diameter of 1 to 4 mm were obtained. Further, this granular oyster shell and granular molten phosphorus fertilizer granulated by a usual method were charged into a blender at a ratio of 8: 2, and as a result, both granular fertilizers were uniformly mixed. When this fertilizer was applied to crops, the fertilizer could be applied uniformly and the disintegration was good, so that the growth of the crop was good without any unevenness.

[0009]

Example 2 First, oyster shells were crushed into small pieces with a pulverizer and sieved to remove large pieces. Next, the oyster shells of the fine particles were charged into a blender, and 4% by weight of sodium lignate was added to the oyster shells and mixed well. Further, as a result of charging this product in a granulator and granulating it while spraying water little by little, clean particles having a substantially circular shape with a diameter of 1 to 4 mm were obtained. Furthermore, this granular oyster shell and granular magnesia hydroxide fertilizer granulated by a usual method were charged into a blender at a ratio of 6: 4, and as a result, both granular fertilizers were uniformly mixed. When fertilizing this with crops,
Since the fertilizer could be applied uniformly and the disintegration was good, the growth of the crop was good without any unevenness.

[0010]

Example 3 First, oyster shells were crushed into small pieces with a pulverizer and sieved to remove large pieces. Next, the oyster shells of the fine particles were charged into a blender, and 6% by weight of sodium lignate was added to the oyster shells and mixed well. Further, as a result of charging this product in a granulator and granulating it while spraying water little by little, clean particles having a substantially circular shape with a diameter of 1 to 4 mm were obtained. Further, this granular oyster shell and granular humus fertilizer granulated by a usual method were charged into a blender at a ratio of 8: 2, and as a result, both granular fertilizers were uniformly mixed. When this fertilizer was applied to crops, the fertilizer could be applied uniformly and the disintegration was good, so that the growth of the crop was good without any unevenness.

[0011]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, oyster shells are finely pulverized, and a water-soluble binder is added and kneaded to granulate the granulated oyster shells to form granular phosphate fertilizer, granular magnesia fertilizer, granular silica. A particle-mixed fertilizer in which acid fertilizers and / or granular humus fertilizers are mixed in appropriate amounts. In addition to the main raw materials used in this method, the granulating agent is also inexpensive, and no special equipment is required. Since it can be sufficiently manufactured with a conventional facility, a low cost particle-mixed fertilizer can be obtained.

Claims (5)

[Claims] 1. Granular oyster shells obtained by pulverizing oyster shells with a pulverizer, adding and kneading a water-soluble binder and granulating the oyster shells, granular phosphate fertilizer, granular magnesia fertilizer, granular silica A particle-mixed fertilizer for granular oyster shells having good disintegration properties in water and soil, which is obtained by appropriately mixing at least one type of granular fertilizer selected from acid fertilizers and granular humus fertilizers. 2. The particle-mixed fertilizer for granular oyster shells having good disintegrability in water and soil according to claim 1, wherein the water-soluble binder used for granulating the oyster shells is a lignin compound. 3. The particle-mixed fertilizer for granular oyster shells having good disintegratability in water and in soil according to claim 1, wherein the granular phosphate fertilizer is a granular processed phosphate fertilizer made of soluble phosphorus fertilizer, magnesia heavy burned phosphorus and the like. . 4. The particle-mixed fertilizer of granular oyster shells having good disintegratability in water and in soil as claimed in claim 1, wherein the granular magnesia fertilizer comprises a magnesia hydroxide fertilizer or a magnesia sulfate fertilizer. 5. The particle-mixed fertilizer for granular oyster shells having good disintegratability in water and soil according to claim 1, wherein granulation of the granular oyster shells is spherical with a diameter of 1 to 4 mm.