JP3485140B2 - Silicate fertilizer or silicic acid fertilizer mixed single fertilizer - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a siliceous fertilizer or a silicic acid potassium fertilizer, and a single-grain mixed fertilizer consisting of oyster shells having good disintegration in water and soil.

[0002]

Fertilizers have been used in powder form for a long time, but in addition to the drawback that fertilizers are easily scattered during fertilizer application, fertilizers are washed away by rainwater after fertilizer application, and the fertilizer does not cover the ground surface. However, there are problems such as impairing water permeability and air permeability of the ground. Then, in order to improve these problems, a method of granulating the fertilizer into particles of an appropriate size was proposed, and is currently being actively practiced. As for the siliceous fertilizer or the silicic acid fertilizer, at present, no effective method for granulating by itself has been proposed. Nitrogen to calcium silicate as conventionally proposed,
One or more selected from phosphoric acid and potassium and one or more selected from lime superphosphate, lime superphosphate and ammonium phosphate are mixed and granulated (Japanese Patent Laid-Open No. 48-7535).
6). What is called granular siliceous fertilizer is powdered siliceous fertilizer such as pig iron slag and nickel slag, industrial magnesium sulfate, reaction products of magnesia and sulfuric acid, and
A product obtained by adding a magnesium sulfate-containing substance such as a reaction product of serpentine and sulfuric acid as a binder and granulating the mixture while adding an appropriate amount of water (Japanese Patent Laid-Open No. 60-14982), pig iron slag, nickel slag, etc. To the powdered silicic acid fertilizer of (1), a mixture of powdered lime phosphate and serpentine, etc. is melted by heating, then rapidly cooled and ground, and powdered fused phosphorus fertilizer is mixed with magnesium sulfate-containing material such as industrial magnesium sulfate. It is proposed to granulate while adding a small amount of water (JP-A-60-145984). Meanwhile oyster shell is currently as it is coarsely pulverized alone or fertilization, or because it is fertilized by mixing with other fertilizers, the granulation is not performed at all. Furthermore, neither the silicic acid fertilizer or the silicic acid-based fertilizer and the method of mixing the oyster shells for granulation have been performed or proposed at all.

[0003]

As described above, the granulation of fertilizer has the problems that the previous powdered fertilizer had, that is, the scattering of fertilizer during fertilization, the runoff of fertilizer due to rainwater after fertilization, and the surface of the ground. This is a technology developed to improve the water permeability and air permeability of the ground due to covering with fertilizer. 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 depending on the type of fertilizer and the type of crop.

However, as described above, it cannot be said that the technology for independently granulating the siliceous fertilizer or the silicic acid-based fertilizer and the oyster shell has been sufficiently completed, and calcium silicate and other Fertilizers such as nitrogen, phosphoric acid,
Mix one kind selected from potassium, one kind selected from lime superphosphate, lime superphosphate, ammonium phosphate,
A method of granulating has been proposed (JP-A-48-7535).
6) However, this method cannot of course granulate a siliceous fertilizer or a mixture of silicic acid potassium fertilizer and oyster shells . Further, a method of adding a magnesium-containing material to the siliceous fertilizer proposed as a method for producing the above-mentioned granular siliceous fertilizer and granulating it (Japanese Patent Laid-Open No. 60-14982 and 60-14598).
Even in 4), no silicic acid fertilizer or a mixture of silicic acid-based fertilizer and oyster shell satisfying the conditions as the particulate fertilizer described above was obtained. Therefore, the labor which had been applied twice to powdery silicic acid fertilizer or silicic acid potassium fertilizer and oyster shell separately until now is labor-saving, and the problem after fertilizing powdery fertilizer as described above In order to improve the quality of silicic acid fertilizer or silicic acid potassium fertilizer and oyster shell powder size, binder type and usage, granulation method, etc. A single-grain mixed fertilizer with excellent oyster shell quality has been obtained.

[0005]

The present invention has been accomplished as a result of earnest research for mixing oyster shells with siliceous fertilizer or silicic acid-based fertilizer to obtain a good quality single grain mixed fertilizer. It is a thing. That is, according to the present invention, finely pulverized oyster shells are mixed with powder of silicic acid fertilizer or silicic acid potassium fertilizer, and a water-soluble binder is added and kneaded to obtain a particle size of 1 to 4 m.
It is a siliceous fertilizer having good disintegrating properties in water and soil or a single-grain mixed fertilizer containing silicic acid potassium fertilizer characterized by being granulated into spherical particles of m. Examples of the siliceous fertilizer of the present invention include wollastonite fertilizer, mineral silicic acid fertilizer, and lightweight aerated concrete powder fertilizer. In addition, as silicate fertilizer,
It is usually called silicic acid fertilizer. In addition, mosquitoes
Finely crushed husks are preferable because coarsely crushed husks do not easily produce fine particles.

As the water-soluble binder which can be used in granulation, generally, a large number of stephen waste water concentrated liquid, alcohol fermentation waste liquid, polyvinyl alcohol, soluble starch, lignic acid, carboxymethyl cellulose, sulfite pulp by-product and the like can be mentioned. However, for the purposes of the present invention, lignin compounds are the best in terms of ease of granulation and disintegration in water and soil. Furthermore, the granulated product has a diameter of 1
A spherical shape of ˜4 mm is preferable because mechanical spraying can be performed smoothly and disintegration after fertilization is appropriately performed. The mixing ratio of the siliceous fertilizer or the silicic acid-based fertilizer and the oyster shell can be arbitrarily selected, but it is preferable that the oyster shell other than the siliceous fertilizer or the silicic acid-based fertilizer is contained in an amount of 5% or more based on the total weight. up until this point,
The fact that granulation of a siliceous fertilizer or a mixture of silicic acid potassium fertilizer and oyster shells , which has been considered difficult to granulate, can be achieved by the present invention as described above can greatly contribute to the development of agriculture.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As described above, according to the present invention, an appropriate amount of oyster shell is mixed with siliceous fertilizer or silicic acid fertilizer, and a water-soluble binder is added and kneaded to granulate. A single-grain mixed fertilizer made of silicic acid-based fertilizer or silicic acid-based fertilizer, which could be easily granulated by this method and had good particle size uniformity. The present invention succeeded in granulating siliceous fertilizer or silicic acid-based fertilizer and oyster shells , which enabled mechanical spraying and labor saving of severe work called 3K work. Labor has been greatly reduced.
In addition, since this fertilizer has a uniform composition, no unevenness in composition occurs as compared with the conventional methods of separately applying siliceous fertilizer or silicic acid-based fertilizer and oyster shells . In addition, this fertilizer has the feature that after fertilization, the particles easily disintegrate and it is well dispersed in the soil, so it is very effective for the growth of crops.

[0008]

Example 1 First, wollastonite fertilizer was pulverized to an appropriate size, and oyster shells were pulverized into small pieces with a pulverizer and sieved to remove large pieces. Next, the wollastonite fertilizer of a suitable size and the oyster shells of small particles were placed in a blender at a weight ratio of 8: 2 and mixed well, to which the total amount of wollastonite fertilizer and oyster shells was added. Then, 5% by weight of sodium lignin sulfonate was added and kneaded well. Further, this product was charged into a granulator and granulated while spraying water little by little, and as a result, clean particles having a substantially circular shape with a diameter of 1 to 4 mm were obtained. When this product was applied to a crop, it was easy to apply the fertilizer and the disintegration was good, so that the growth of the crop was good.

[0009]

As described above, according to the present invention, the oyster shell is mixed with the siliceous fertilizer or the silicic acid-based fertilizer in an appropriate amount,
This is a mixed fertilizer made of silicic acid fertilizer or silicic acid potassium fertilizer that is made by adding and kneading a water-soluble binder to this, and the granulating agent is inexpensive, including the main raw materials used in this method, and the equipment used. However, it does not require any special one, and can be produced sufficiently with general equipment, so low-cost single-grain mixed fertilizer can be obtained.

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Claims (2)

(57) [Claims] 1. A powder of siliceous fertilizer or silicic acid fertilizer is mixed with finely crushed oyster shells , and a water-soluble binder is added and kneaded to form a spherical particle having a particle diameter of 1 to 4 mm. A single-grain fertilizer containing silicic acid fertilizer or silicic acid potassium fertilizer having good disintegration in water and soil characterized by being fermented. 2. The single grain mixed fertilizer of silicic acid fertilizer or silicic acid potassium fertilizer having good disintegration in water and soil according to claim 1, wherein the water-soluble binder is a lignin compound.