JPH0633211B2 - Granulation method of fertilizer containing organic matter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for granulating an organic matter-containing fertilizer, and more specifically, a mixture containing an organic matter-containing fertilizer, a solid substance in natural rubber latex serum, and water. The present invention relates to a method for granulating an organic matter-containing fertilizer.

[Prior Art and Problems Thereof] Granular compound fertilizers containing organic matter are generally granulated with a water mixture of the compounded fertilizer containing organic matter, and the obtained granules are dried to a desired particle size range. It is produced by sieving. In the case of granulating the above mixture, if tumbling granulation is performed using a pan granulator or a rotary cylinder granulator, granulation becomes more difficult as the blending ratio of the organic matter increases, and it is also possible to obtain There is a problem that the hardness of the fertilizer particles thus obtained is lowered.

When the particle hardness of the granulated product obtained by the granulation operation is 1 kg or less when measured with a Kiya type hardness tester, when the granulated product is dried by a dryer such as a rotary dryer or a fluidized furnace. In the dryer, the particles are subjected to a drop impact, the particles collapse, and the yield of the product fertilizer decreases significantly.

Therefore, in order to produce a granular chemical fertilizer with a large proportion of organic substances, as a granulating aid, for example, a method of granulating by adding lignin, a lignin solution, a molasses solution, etc. has been proposed. If a large amount of such a granulation aid is added in order to produce the grain effect, the content of fertilizer components in the product granular fertilizer will be insufficient, or the product will give off a bad odor or color, and its commercial value will increase. The problem of lowering occurs.

When granulating the fertilizer mixture by tumbling granulation,
Since the above-mentioned problems occur, the allowable limit of the compounding ratio of the organic substance in the fertilizer is at most about 30% by weight, and in order to granulate the fertilizer containing the organic substance more than that, the rolling granulation method is used. Cannot be adopted, and must be performed by a compression molding granulation method using a compression roll, a briquetting roll, a pelletizer, or the like. However, granular fertilizers are generally required to have an average particle size of 2 to 4 mm, and in order to granulate such small particles by the compression molding granulation method, enormous equipment is required and it is not practical. Absent.

It is desired to increase the mixing ratio of organic substances in fertilizers in order to enhance the functionality of fertilizers. Fertilizers containing a large amount of such organic compounds can be easily granulated, and the yield of product fertilizers can be increased. There is a demand for a good granulation method.

[Object of the Invention] The present invention is capable of easily granulating a fertilizer containing an organic substance with high efficiency, and further forming a granule having high hardness, and an organic substance having a high yield of a product fertilizer after drying. It is an object of the present invention to provide a method for granulating a contained fertilizer.

[Structure of the Invention] The present invention comprises a fertilizer containing an organic substance, a solid substance in natural rubber latex serum, and water, wherein the solid substance content is 2 to 40% by weight of the fertilizer content, and A method for granulating an organic matter-containing fertilizer, which comprises granulating a mixture having a total concentration of the fertilizer and the solid of 60 to 95% by weight.

In a preferred aspect of the present invention, the fertilizer contains 35 to 80 of the organic matter.
The method for granulating the organic matter-containing fertilizer is characterized in that the fertilizer is contained by weight%.

In another preferred embodiment of the present invention, the mixture has a solid content of 20 to
The method for granulating the organic matter-containing fertilizer is characterized in that it is prepared using a natural rubber latex serum containing 80% by weight.

Another preferred embodiment of the present invention is the method for granulating an organic matter-containing fertilizer, wherein the content of the solid matter in the mixture is 3 to 30% by weight of the content of the fertilizer.

[Detailed Description of the Invention] The fertilizer containing an organic substance in the granulation method of the present invention is an organic substance such as bone meal, skin meal, rapeseed meal, hoofhorn meal, dried microbial fertilizer, fish meal, soybean meal and nitrogen ( It is a mixture with a chemical fertilizer containing one or more of the three elements of the fertilizer of N) component, phosphoric acid (P) component, and potassium (K) component. The above-mentioned chemical fertilizers are known per se, and any conventionally known chemical fertilizer can be optionally used in the present invention, but preferably 1 to 46% by weight of nitrogen (N) component and phosphoric acid (P) component. It is a chemical fertilizer containing 1 to 60% by weight of (P ₂ O ₅ ) and 1 to 60% by weight of potassium (K) component.

The content of the organic matter in the fertilizer containing the organic matter is 35
It is preferably from 100 to 100% by weight, particularly from 35 to 80% by weight.

The natural rubber latex serum in the present invention is a serum obtained when various natural raw rubbers such as ribbed smoked sheets and crepes are produced, which is obtained by adding an acid to the natural raw rubber latex to coagulate and separate the rubber component. The above natural rubber latex serum, in the state where the rubber component is separated,
Generally, it contains about 2 to 3% by weight of solid matter.

It is necessary that the raw material mixture for the granulation method of the present invention contains 2 to 40% by weight, preferably 3 to 30% by weight, of the solid fertilizer in the natural rubber latex serum.

When preparing the mixture, the solid may be used in the state of a solid obtained by concentrating and separating the natural rubber latex serum, but in general, the natural rubber latex serum is concentrated to contain a solid. 20-85% by weight, especially 3
It is preferable to use it as a concentrated solution of 0 to 80% by weight in order to improve the hardness of the obtained fertilizer particles.

Table 1 shows the composition of an example of a concentrated solution of natural rubber latex serum.

The total concentration of the fertilizer and the solids in the raw material mixture of the granulation method of the present invention is 60 to 95% by weight, preferably,
It is necessary to be 70 to 90% by weight. If the total concentration of the fertilizer and the solids is less than the above range, the amount of water during granulation becomes too much, resulting in overgranulation, and the desired product particle size cannot be obtained. Since the water content at the time of granulation is too small to solidify, it becomes impossible to granulate.

In order to adjust the total concentration of the fertilizer and the solids in the mixture within the above range, when the mixture is produced, the concentration of the solids in the natural rubber latex serum and the blending of natural rubber latex serum are blended. You can adjust the amount,
Water may be further added to the mixture or water may be removed from the mixture after the above mixture is produced.

In the granulation method of the present invention, as the granulation method, various granulation methods known per se can be arbitrarily adopted. In the present invention, particularly, high production efficiency and capable of easily producing granules having a wide range of particle diameters, a pan-type granulator, a rotary cylinder-type granulator, a rotary truncated cone-type granulator, etc. It is extremely advantageous because it is possible to granulate particles having a particle hardness (measured by a Kiya type hardness meter, the same applies hereinafter) of more than 1.0 kg by a tumbling granulation method using a. According to the present invention, the product fertilizer after drying can be granulated into a granulated product having a generally desired particle size of about 2 to 4 mm.

Granules of organic matter-containing fertilizer produced by the present invention,
As it has a high particle hardness as described above, even if it is dried using any dryer such as a rotary dryer or a flow furnace, the particles are less likely to collapse during the drying process and the yield of granular fertilizer products is high. can do.

Next, the present invention will be specifically described by showing Examples and Comparative Examples of the present invention. Parts in Examples and Comparative Examples are parts by weight and%
Is% by weight.

[Example 1] Ammonium sulfate 27 parts, ammonium phosphate 2.8 parts, superphosphate 22.1 parts, potassium chloride 14.3 parts and organic matter (equal amount mixture of bone powder and skin powder, the following examples and comparison) The same is used in the examples) 33 parts of mixture (fertilizer component N-P-K is 8-8-
8) was crushed to produce a fertilizer containing powdery organic matter.

On the other hand, natural rubber latex serum is concentrated to obtain solid contents of 20%, 30%, 40%, 50% and 60%, respectively.
A concentrated natural rubber latex serum was prepared.

1 kg of a fertilizer containing the above organic matter, water in the amounts shown in Table 2 and concentrated natural rubber latex serum in the concentrations and amounts of solids shown in Table 2 were mixed to prepare a raw material mixture for granulation.

This raw material mixture for granulation was put into a pan-type granulator with an inner diameter of 50 cm and a height of 10 cm and made of stainless steel (SUS304) with a rotation controller, and was rotated at a rotation speed of 15 rpm for about 15 minutes.
A granulation operation was performed for a minute.

The obtained granulated product was placed in a constant temperature box dryer at 70 ° C. and left to dry for about one day. The dry granules were sieved with a Tyler standard sieve of 5 mesh and 10 mesh, the granules of 5 to 10 mesh were used as product granule fertilizers, and the weight% of the product granule fertilizer to the total dry granules was regarded as the product yield.

The product yield for each case is shown in Table 2. Table 2 also shows the product yield of the dried granular fertilizer produced in the same manner except that the natural rubber latex serum was not used.

[Example 2] Ammonium sulfate 2 was used when producing a fertilizer containing powdery organic matter.
Mixture of 1.1 parts, phosphorus ammonium 3.2 parts, superphosphate 11.6 parts, potassium chloride 14.3 parts and organic matter 48 parts (fertilizer component N
-P-K, the product granular fertilizer was manufactured in the same manner as in Example 1 except that 8-8-8) was used.

Table 3 shows the amount of water and the solid content and amount of the concentrated natural rubber latex serum, and the product yield of the product granular fertilizer.

Table 3 also shows the product yield of the dry granular fertilizer produced in the same manner except that the natural rubber latex serum was not used.

[Example 3] Ammonium sulfate, ammonium phosphate, lime superphosphate, potassium chloride, and organic substances were mixed in the mixing ratios shown in Table 4, and a fertilizer containing a powdery organic substance was produced in the same manner as in Example 1. The compounding ratio in each case is such that the total content of organic matter in the product granular fertilizer and solids from the concentrated serum is 35% of the product granular fertilizer.
It was set to be%.

Concentrated natural rubber latex serum with a solid content of 65%,
It was used in such an amount that the solid content from the serum would be the value shown in Table 4. Water was added so that the total solid content of the raw material mixture for granulation was 87% to prepare a raw material mixture for granulation.

A product granular fertilizer was produced in the same manner as in Example 1 except for the above. Table 5 shows the product yield of the obtained product fertilizer.

The dry granules are sieved with a Tyler standard sieve of 6 mesh and 8 mesh, 20 grains are arbitrarily taken out from the granules of 6 to 8 mesh, and the particle hardness is measured using a Kiya type hardness meter, The average value is shown in Table 5.

Table 5 also shows the results of the dry granular fertilizers produced in the same manner except that the natural rubber latex serum was not used.

[Comparative Examples 1 and 2] Instead of the concentrated natural rubber latex serum having a solid content of 65%, a lignin solution (solid content concentration 40%) (Comparative Example 1) or a molasses liquid (solid content concentration 25%) ( A granular fertilizer was produced in the same manner as in Example 3, except that Comparative Example 2) was used and the amount of solid content added was the same as the amount of solid content added in the serum. did.

The product yield and particle hardness of the obtained granular fertilizer are shown in Table 5.

[Example 4] Product granular fertilizer as in Example 3 except that the total content of organic matter in the product granular fertilizer and solids from the concentrated serum was set to 50% of the product granular fertilizer. Was manufactured.

The mixing ratio of the raw material mixture is shown in Table 6, and the product yield and particle hardness of the obtained product fertilizer are shown in Table 7.

Table 7 also shows the results of the dry granular fertilizers produced in the same manner except that the natural rubber latex serum was not used.

[Comparative Examples 3 and 4] Instead of the concentrated natural rubber latex serum having a solid content of 65%, a lignin solution (solid content concentration 40%) (Comparative Example 3) or a molasses liquid (solid content concentration 25%) ( A granular fertilizer was produced in the same manner as in Example 4 except that Comparative Example 4) was used and the amount of solid content added was the same as the amount of solid content added in the serum. did.

The product yield and particle hardness of the obtained granular fertilizer are shown in Table 7.

[Example 5] The product granular fertilizer as in Example 3 except that the total content of the organic matter in the product granular fertilizer and the solid content from the concentrated serum was adjusted to 65% of the product granular fertilizer. Was manufactured.

The compounding ratio of the raw material mixture is shown in Table 8, and the product yield and particle hardness of the obtained product fertilizer are shown in Table 9.

Table 9 also shows the results of the dry granular fertilizers produced in the same manner except that the natural rubber latex serum was not used.

[Comparative Examples 5 and 6] Instead of the concentrated natural rubber latex serum having a solid content of 65%, a lignin liquid (solid content concentration 40%) (Comparative Example 5) or a molasses liquid (solid content concentration 25%) ( A granular fertilizer was produced in the same manner as in Example 5, except that Comparative Example 6) was used and the amount of solid content added was the same as the amount of solid content added in the serum. did.

The product yield and particle hardness of the obtained granular fertilizer are shown in Table 9.

[Cultivation test] With respect to the fertilizer of Case 5-3 of Example 5 manufactured as described above, a cultivation test of a crop was performed under the following conditions.

The results of the cultivation test are shown in Table 10.

Table 10 also shows the results of cultivation tests conducted in the same manner as above except that the mixture of P ₂ O ₅ and K ₂ O and the fertilizer of Case 5-0 of Example 5 were used. .

Scale: 1/10000 ares Neubauer pot Soil: 550g, Fukkaichi soil (sand loam soil) Fertilization amount: 100-600mgN / pot Irrigation amount: Irrigation under field conditions Target crop: Cucumber seeding amount: 6 seeds / pot Growth period: S62 .7.3 to 7.20 for 14 days Growing place: cultivation management in glass room [Effects of the Invention] By comparing the results of each Example and Comparative Example, according to the granulation method of the present invention, an ordinary granulator having high productivity (for example, a rolling granulator) is used. Also, it is clear that a granulated product having a high particle hardness can be produced from a fertilizer containing an organic matter, and therefore a granular fertilizer can be produced with a high yield.

Further, in the fertilizer obtained by the granulation method of the present invention,
Contains solids in natural rubber latex serum,
No phytotoxicity occurs even when used for cultivation of crops, and when the amount of fertilizer applied is large, phytotoxicity is less likely to occur than that without the solid matter, and the fertilizer granulated and produced by the present invention is It is clearly an effective fertilizer.

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Claims (1)

[Claims] 1. A fertilizer containing an organic matter, a solid matter in natural rubber latex serum and water, wherein the solid matter content is 2 to 40% by weight of the fertilizer content, and the fertilizer and the fertilizer in the mixture. A method for granulating an organic matter-containing fertilizer, which comprises granulating a mixture having a total solid content of 60 to 95% by weight.