JPS596932A - Granulation of powdery fertilizer and feed - Google Patents

Abstract

PURPOSE:To inexpensively prepare granular fertilizer and feed showing no hygroscopicity during a storage period and having property rapidly collapsed and dispersed in water, by a method wherein a starch waste water concentrate is added to powdery fertilizer and feed and the resulting mixture is kneaded to be granulated. CONSTITUTION:To fine powdery fertilizer or feed, for example, carcareous fertilizer, byproduct lime or byproduct feed, a starch waste water concentrate is added in an amount smaller than that of the fertilizer or feed and the obtained mixture is kneaded to be granulated. The above mentioned kneading condition is not especially limited and it is sufficient if kneading is carried out at a room temp. by a usual kneader. Granulation is carried out after kneading but it may be also carried out by a usual granulator, for example, a tumbling type granulator. A subsequent drying time is appropriately determined corresponding to contained moisture content. According to this granulation method, a nutritious component, that is, starch can be simultaneously added. The obtained granule is low in hygroscopicity during a storage period and shows property rapidly collapsed and dispersed in water.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for granulating powder compacted feed, such as calcareous fertilizer or powder feed, using starch wastewater concentrate.

Conventionally, most powdered fertilizers have tended to be granulated to improve handling and prevent scattering, and compound fertilizers and chemical fertilizers are both granulated and convenient to handle.

This product is suitable for mechanical spraying. However, since calcareous fertilizers have little added value and are granulated, which increases costs, they are often used in powder form. Modern agriculture, which requires labor saving, has taken the path towards mechanization and has seen the development, improvement, and development of rational and efficient mechanical devices. Fertilizers have also been improved to make them more suitable for this purpose, but limestone fertilizers, which have particularly high scattering properties, have been eliminated.The company has gained a large number of regular customers due to the completion of a series of mechanized work formats.

On the other hand, grasses and anomalous plant fibers (beet pulp, starch meal, etc.) used as feed for livestock require dehydration for long-term storage and formulation, and are dried in the sun or mechanically. However, due to drying, it becomes powder, causing segregation during blending, inconvenience in handling, etc., and countermeasures were needed.

Granulation or caking is considered to be suitable as a method for completely removing these particles. Conventional granulation methods include one using lignin sulfonic acid, a by-product of the pulp industry, one using a polymeric unifying agent, and one using sodium salts (Japanese Patent Publication No. 56-27086).
, by carbon dioxide gas injection method (Special Publication No. 47-13084)
), by PH adjustment O8F (Special Publication No. 56-8889
3) Additive granulation methods, such as those using alcoholic fermentation waste liquid, have been attempted, but there are problems such as high prices due to the multiple use of raw materials, limited supply due to regional differences, and burden of freight charges, and low cost is not required at all. However, it is economically difficult to use them in feedstuffs, and some of them cannot be used in feeds, such as lignin sulfonic acid, polymeric integrators, and sodium salts.

The present invention was developed in Formula 1 in view of the above-mentioned circumstances.

Concentrated starch wastewater liquid rich powder fertilizer feed that can be used not only as fertilizer but also as feed without any problems, and even as a nutrient.It can be added to, for example, calcareous fertilizer or powder feed, and is easy to handle and does not absorb moisture during storage. The object of the present invention is to provide a method for completely granulating the above-mentioned fertilizer feed while ensuring the property of disintegrating and dispersing quickly in water.

The present invention is made by granulating fine powder fertilizer or feed, such as calcareous fertilizer, by-product lime, and Vt, which is obtained by adding and kneading starch waste liquid concentrate to by-product feed. Although it varies depending on the type and condition of the fertilizer feed and the amount of water contained in the starch waste liquid concentrate, it is possible to add a smaller amount of the above starch waste liquid concentrate to the fertilizer feed that is continuously fed to the kneading machine. and do it.

The mixing conditions are not particularly limited, and it is sufficient to knead at room temperature using an ordinary kneader.

After kneading, granulation is performed, and the granulation may also be performed using a normal granulator, such as a transfer type granulator.

The above-mentioned granulation ends the original process, but the granulated fertilizer feed is dried as a post-process. The drying time is appropriately determined depending on the amount of moisture contained.

As described above, in the present invention, by adding a starch wastewater concentrate to the powdered feed, it is possible to completely granulate the fertilizer feed, and furthermore, the nutrients of starch can be added at the same time. . The above-mentioned granules had low hygroscopicity during storage and quickly disintegrated and dispersed in water.

Examples are shown below, and the test results for each physical property test are shown in Table 3 and Figures 1 to 6.

The concentrated liquid used in the invention is concentrated wastewater after removing starch and raw lees from ground potato lees during the starch manufacturing process. The waste water mentioned above is one that is discharged in a large amount during the starch manufacturing process. Treatment methods include aeration in reservoirs, underground infiltration, and discharge into rivers, but there are problems in terms of pollution prevention.
It is concentrated to about 0 to 70 g and used as feed for livestock.

In the present invention, such concentrated waste liquid is used for granulation of powdered feed, and its component analysis is as shown in Table 1.

Table 1 Starch wastewater concentration analysis results Moisture content (H0) 67
, 36 t Total amount of nitrogen (N) 1.41 # Total phosphoric acid (PzOs) 1, 25 #
Total amount of potassium (K2O) 3.221 Total amount of lime (Oa
O) o, o2y magnesia total t (MgO)
o, 25 #sodium oxide (Na20)
o, is #organic substance (ignition loss method) 22.18# specific gravity
1.14 pH 5.5 In addition, the calcareous fertilizer used in the following examples has the particle size of Table 2.

Table 2 Particle size of calcareous fertilizer used in Examples Example 1 Fertilizer finely pulverized in the pulverization process of calcium carbonate fertilizer,
Continuously send it to a kneading machine, add an amount equivalent to 7% by weight to 9M stitches of the total fertilizer flow t#J, and knead it for about 120 seconds using a kneading machine. The mixture was sent to a rolling granulator and granulated by rolling for about 300 seconds.

Furthermore, the material was placed in a co-current dryer and dried to a moisture content of 0.7 g or less in about 600 seconds, and then subjected to a physical property test.

Example 2 All slaked lime for fertilizers Same as in Example 1, the starch wastewater concentrate is continuously fed to the mixer at the inlet of the mixer at a rate of 25 to 4 ml of the fertilizer flow rate.
With the addition of 0% by weight, approximately 300%
After kneading for seconds and granulating approximately 300 pieces using a transfer type granulator,
The material was dried for about 600 seconds in a counter-type dryer, and the material having a moisture content of less than about 1.5 inches was subjected to a physical property test.

Example 3 Potato seaweed was ground whole and dehydrated using a centrifugal separator, then separated from starch using a centrifugal sieve, and the raw glaze was dried using an open flame dryer and sent to a mixer. At the inlet of the mixer, 30% of the feed flow rate by weight of concentrate is added and mixed and granulated. After that, it is dried with hot air, crushed with a crusher, and sized.

Test Results Hygroscopic Test Table 3 Hygroscopic Test Results 20° C. Relative Humidity 70% The rate of increase in moisture was measured using a saline saturated solution in a constant humidity desiccator.

(%) From the above results, granular calcium carbonate fertilizer did not show any hygroscopicity, but slaked lime did not have hygroscopicity in the air.
It is considered that U a Oo 3 increased due to & reaction.

[Brief explanation of the drawing]

The drawings show the test results. Figure 1 is a particle size distribution diagram of granular calcium carbonate in Example 1, Figure 2 is a distribution diagram of granular slaked lime particle size in Example 2, and the third diagram is a diagram of granular slaked lime particle size distribution in Example 1. Figure 4 shows the strength of granular slaked lime particles in Example 2. Figure 5 shows the strength of granular calcium carbonate (particle size 2.0 cm) in Example 1 in water (water temperature 20°C).
), and FIG. 6 shows the disintegration rate in water (water temperature 20° C.) of granular slaked lime (particle size 2.Owm) in Example 2. Patent Applicant: Kunikofu Lime Industry Co., Ltd. Bihoro Regional Agricultural Processing Agricultural Cooperative Federation Agent Patent Attorney: Toru Fujioka Figure J - 0.5 + 0.5 +1. O+2.0 +3.5 Particle size mm Fig. 2 Concentrate mixture ratio 10, 5 + 0.5 edition, 0 +2.0 +3.5 Particle size mm Concentrate mixture ratio Particle size mm Concentrate mixture ratio Particle size mm Concentration Liquid mixing bath time m1n a Condensed liquid mixing rate time min 192

Claims (1)

[Claims] A method for granulating powder compacted feed, which is characterized in that the entire starch wastewater concentrate is added to powder compacted feed, kneaded, and then granulated.