KR101611969B1 - Manufacturing method of fertilizer lime silicate - Google Patents

Abstract

The present invention relates to a method for producing a lime silicate fertilizer, and more particularly to a method for producing a lime silicate fertilizer by mixing natural anhydrite, blast furnace slag and liquid fertilizer.
A method for producing a lime-based silicate fertilizer according to the present invention comprises the steps of: preparing a natural anhydrous gypsum and a blast furnace slag with a fine powder of 50 mu m; mixing 1 part by weight of the natural anhydrous gypsum made of fine powder through the first step A second step of mixing the blast furnace slag with 2 parts by weight of the first mixture to prepare a first mixture, and mixing 1 part by weight of the first mixture with the second mixture, And a fourth step of immersing and aging the secondary mixture mixed through the third step, wherein the animal manure is produced by fermenting an animal manure, and in the fourth step, the indoor humidity 60%, at room temperature of 15 ° C, the secondary mixture is aged for 84 hours, and the fertilizer produced through the fourth step is sprayed onto paddy fields or fields after being formulated in the form of 5 mm rings or pellets .
The method for producing lime silicate fertilizer according to the present invention is a method for producing lime silicate fertilizer which is effective for producing crops through a simple process of mixing natural anhydrous gypsum, blast furnace slag and fertilizer to reduce the number of fertilizer application times and the dissolution rate of fertilizer It is effective. In addition, it is possible to control the pH of the soil so as to facilitate the growth of the crops and to increase the resistance of the pests by supplying sufficient calcium and silicate.

Description

Technical Field [0001] The present invention relates to a manufacturing method of a lime silicate fertilizer,

The present invention relates to a method for producing a lime silicate fertilizer, and more particularly to a method for producing a lime silicate fertilizer by mixing natural anhydrous gypsum, blast furnace slag and liquid fertilizer.

The crops require a large amount of calcium at the root of the root, but calcium is not known to migrate well in the plant. Soil with low calcium content often does not grow enough roots to absorb the necessary nutrients from surrounding soil.

Gypsum is mainly used as calcium sulfate fertilizer (CaSO ₄ ), mainly calcium (lime) and sulfur. In general, gypsum is produced through a phosphoric acid manufacturing plant, a thermal power plant, and various other processes, and an enormous amount of gypsum produced each year can not be consumed for conventional use, so it is used in buildings, cement, road construction and the like. Among them, the method of using the gypsum in agriculture is highly likely to be used in the point that the productivity of the crop in the soil which is acidic and easy to disperse can be greatly increased, but the use thereof is limited because it contains various heavy metals.

In addition, the silicate fertilizer was poorly applied to farmers due to high price, despite various advantages such as suppression of rice dropping, improvement of quality, reduction of occurrence of blast fungus, and alkalization of acidic soil. Accordingly, various types of silicate fertilizers have been developed and utilized to supply silicate during the rice growing process. In particular, the use of silicate fertilizers has been greatly expanded and generalized since slag, a by-product from steelworks, has been usefully used as silicate fertilizer.

As such, various types of fertilizers have been developed and utilized to supply calcareous or silicate during rice growing.

In this regard, the silicate fertilizer composition for reducing the generation of methane gas in the soil and the method for reducing the methane gas generation in the soil using the same are disclosed in Korean Patent No. 10-0829438 However, there is a problem that the treatment process is somewhat complicated and toxicity may be caused when the steel slag used is excessively used in the soil.

Korean Patent Publication No. 10-0829438 (May 07, 2008)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to improve the efficiency and reduce the dissolution rate of fertilizer by mixing the natural anhydrous gypsum, blast furnace slag and liquid fertilizer.

It is also an object of the present invention to increase the resistance of the pests by supplying calcification to the soil to adjust the pH to facilitate the growth of crops and to supply silicate.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems to be solved by the present invention, which are not mentioned here, As will be appreciated by those skilled in the art.

A method for producing a lime-based silicate fertilizer according to the present invention comprises the steps of: preparing a natural anhydrous gypsum and a blast furnace slag with a fine powder of 50 mu m; mixing 1 part by weight of the natural anhydrous gypsum made of fine powder through the first step A second step of mixing the blast furnace slag with 2 parts by weight of the first mixture to prepare a first mixture, and mixing 1 part by weight of the first mixture with the second mixture, And a fourth step of immersing and aging the secondary mixture mixed through the third step, wherein the animal manure is produced by fermenting an animal manure, and in the fourth step, the indoor humidity 60%, at room temperature of 15 ° C, the secondary mixture is aged for 84 hours, and the fertilizer produced through the fourth step is sprayed onto paddy fields or fields after being formulated in the form of 5 mm rings or pellets .

The process for producing lime silicate fertilizer according to the present invention is a process for producing lime silicate fertilizer which is effective for growing crops through a simple process of mixing natural anhydrous gypsum, blast furnace slag and fertilizer to reduce the number of fertilizing times and the rate of elution of fertilizer It is effective.

In addition, it is possible to control the pH of the soil so as to facilitate the growth of the crops and to increase the resistance of the pests by supplying sufficient calcium and silicate.

1 is a process drawing showing a method for producing a lime silicate fertilizer according to the present invention.
Fig. 2 shows the dissolution rate of the fertilizer with respect to time.
FIG. 3 is a graph comparing plant lengths when fertilized to rice seedlings using the above-described Comparative Examples and Examples.
FIG. 4 is a graph comparing the lengths of plant lengths when fertilized with flavor rice using the above-described Comparative Examples and Examples.
FIG. 5 is a graph comparing changes in the number of tillers when fertilized to rice leaves using the above-described Comparative Examples and Examples.
FIG. 6 is a graph comparing changes in the number of tillering when applied to flavor rice using the above-described Comparative Examples and Examples.
FIG. 7 is a graph comparing changes in leaf color intensity when applied to rice seedlings using the above-described Comparative Examples and Examples.
FIG. 8 is a graph comparing changes in leaf color intensity when fried rice is fertilized using the above-described Comparative Examples and Examples.
FIG. 9 is a graph comparing rice yields produced when rice seedlings are fertilized using the above-described Comparative Examples and Examples.
FIG. 10 is a graph comparing rice yields produced when flavor rice was fertilized using the above-mentioned Comparative Examples and Examples.
11 is a graph showing incidence of paperback disease according to Comparative Examples and Examples.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings.

Hereinafter, a method for producing the above-described lime silicate fertilizer will be described with reference to the drawings and examples.

≪ Preparation method of calcined silicate fertilizer >

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flowchart showing a method for producing a lime silicate fertilizer according to the present invention.

First, in the first step (S1), natural anhydrous gypsum and blast furnace slag are pulverized to prepare a fine powder. Specifically, the particle size of the natural anhydrous gypsum and blast furnace slag powder is pulverized to 30 micrometers to 60 micrometers.

When the particle size of the natural anhydrous gypsum and the blast furnace slag powder is less than 30 micrometers, there is a loss of material due to a large amount of powder dust, and when it exceeds 60 micrometers, the powder is not uniformly dispersed when mixed with fertilizer, .

The components of the natural anhydrous gypsum are shown in Table 1 below. In general, phosphorus phosphate gypsum, which is a calcareous fertilizer set in the standard of fertilizer, is to be used only in reclaimed land, field, or orchard. This is due to the various types of heavy metals contained in the phosphate gypsum.

sample Availability
CaO (%) Availability
MgO (%) Availability
SiO ₂ (%) Cr (%) Ni (%) Ti (%) Natural anhydrous gypsum 33.6 0.017 0.027 0 0 0 Standards of phosphoric acid gypsum 23 or more - - 0.1 or less 0.01 or less 0.04 or less

Natural anhydrous gypsum and phosphate gypsum are similar in mineral composition to CaSO ₄ but in the case of natural anhydrous gypsum, CaO and SO ₃ ^-2 components of limestone are produced by the reaction of lime and sulphate existing in natural crust. It is the quality of pure gypsum which is produced by rising in the sea after reaction and is not contained in heavy metal at all as shown in Table 1 above. However, phosphorus gypsum is produced by the method of producing phosphoric acid, which is produced by the method of producing phosphoric acid by reacting sulfuric acid in phosphorus with phosphoric acid, which is produced for the purpose of chemical fertilizer. Busan gypsum containing trace amounts of arsenic, lead and cadmium is used as raw material I am using it.

Therefore, Busan Phosphate Gypsum can only be used for limited use in soils and crops, but natural anhydrite gypsum can be applied to a wide variety of soils such as rice fields, fields, fruit trees and reclaimed land.

The components of the blast furnace slag are those having the alkaline degree of 50% to 70% so as to satisfy the criteria of the light silicate fertilizer shown in Table 2 below.

sample Availability
CaO (%) Availability
MgO (%) Availability
SiO ₂ (%) Cr (%) Ni (%) Ti (%) Blast furnace slag 38.4 2.6 31.2 0 0 001 Based on silica - 2 or more 15 or more 0.1 or less 0.01 or less 0.04 or less

Next, in a second step (S2), the first mixture is prepared by mixing the natural anhydrite made of fine powder and the blast furnace slag through the first step (S1).

Specifically, 0.5 to 4 parts by weight of the blast furnace slag is blended with 1 part by weight of the natural anhydrous gypsum to prepare a first mixture. If the blast furnace slag is less than 0.5 part by weight, the silicate is insufficient for the crops and the effect of preventing pest insects and resistance to defective environment is lessened. If the blast furnace slag is more than 4 parts by weight, the proper amount of silicate is already exceeded, Is inefficient.

In the third step (S3), the primary mixture and the fertilizer mixed through the second step (S2) are mixed to prepare a secondary mixture. The fertilizer to be used at this time is at least one of liquid fertilizer and animal juice made by fermenting livestock manure.

Specifically, when the primary mixture and the liquid fertilizer are mixed, the liquid fertilizer is mixed in an amount of 0.2 to 0.5 parts by weight per 1 part by weight of the primary mixture.

When mixing the primary mixture with the animal manure produced by fermenting the livestock manure, 1 to 2 parts by weight of the primary mixture is mixed so that the animal manure produced by fermenting the livestock manure is 2 to 6 parts by weight.

The livestock manure can be used in the form of an animal manure through fermentation, which can be an effective means of utilizing livestock waste.

The mixing amount of the primary mixture and the fertilizer is such that the amount of nitrogen contained in the fertilizer is 0.02 to 0.05 part by weight for the primary mixture.

The amount of nitrogen contained in the liquid fertilizer is generally about 9%, and the amount of nitrogen contained in the animal manure produced by fermenting the animal manure is about 0.2 to 0.3%.

When the animal juice is less than 2 parts by weight per 1 part by weight of the primary mixture, the nutrients necessary for synthesis of protein, nucleic acid and the like are insufficient, so that the growth is not smooth. The amount of animal juice is 6 parts by weight Excessive growth can lead to abnormal growth, which can lead to problems in terms of environment, such as acidification of the soil or water pollution. Therefore, it is advantageous to mix at the mixing ratio described above, and more preferably, to 1 part by weight of the primary mixture, 4 parts by weight of the animal liquid ratio is mixed.

Next, in a fourth step (S4), the mixed secondary mixture is immersed in the third step (S3) and aged for a long time. This is to reduce the rate of dissolution of the fertilizer and to adjust the amount of nitrogen required for crop growth.

Specifically, it is immersed for 72 to 96 hours after the preparation of the secondary mixture. At this time, the immersion is performed by mixing the secondary mixture in powder form with the above-mentioned fertilizer and aging for a long period of time. When aged for a long period of time longer than 72 hours, a large amount of water is evaporated, The fertilizer is infiltrated and formed into a fertilizer in the form of clay. As a result, the concentration of nitrogen is increased, and it is formed into a slow-acting fertilizer in which the constituents of the fertilizer are gradually eluted, when the formulation is formulated in the form of the following rings or pellets.

Immersion time (days) pH Nitrogen content (%) One 9.29 0.13 2 9.45 0.19 3 9.47 0.22 4 9.49 0.23 5 9.51 0.25

In Table 3, changes in the pH and nitrogen amount were measured at 0.2% liquid concentration from the first day to the fifth day after aging of the primary mixture in order to measure changes in pH and nitrogen amount according to aging time.

When the aging time is less than 72 hours (3 days), the mixing is not made uniform. When the concentration of nitrogen contained in the mixture is insufficient and the aging time exceeds 120 hours (5 days) And since the amount of nitrogen can not be expected to increase over time, the efficiency of the operation is lowered. More preferably, when aged for 96 hours (4 days), the amount of nitrogen is 0.22%, and since the increase of the amount of nitrogen is not high even after the elapse of time, it is possible to produce the most effective nitrogen in terms of time and economy.

At the time of aging, it is immersed in a room maintained at a humidity of 40 to 80% and a temperature condition of 0 to 25 ° C.

When the humidity of the room is less than 40%, there is a disadvantage in that the moisture is weakened and the viscosity is weakened and the formulation is not good. When the moisture content is more than 80%, the moisture content is too high. Also, when the room temperature is below 0 ° C, the immersion water is frozen and it is difficult to use. When the temperature exceeds 25 ° C, the room humidity is difficult to maintain and nitrogen together with moisture may be volatilized.

2 is a graph comparing the elution amounts of the fertilizer with time after the application of the fertilizer. It can be observed that the elution amount of the fertilizer changes drastically when the liquid fertilizer is sprayed, but when the natural anhydrous gypsum, the blast furnace slag and the liquid fertilizer are mixed, the elution amount of the fertilizer gently increases and then decreases slowly.

When the fertilizer is matured on the porous powder through the fourth step (S4), the fertilizer having a slow-releasing property gradually elutes the fertilizer after spraying the fertilizer and becomes an effective fertilizer for growing the crop.

The lime silicate fertilizer produced through the above step can be produced in the form of pellets or pellets. Specifically, it is preferable to produce a ring having an average size of 2 to 6 millimeters.

If the size of the circle is less than 2 millimeters, it is not easy to reduce the dissolution rate of the fertilizer. If the size of the circle exceeds 6 millimeters, spraying of the fertilizer is not easy.

Further, a chemical fertilizer may be further added to the mixture of the natural anhydrous gypsum, the blast furnace slag and the fertilizer in consideration of cost and efficiency.

In the present invention, the effects of using the fertilizer manufactured by the method of manufacturing the lime silicate fertilizer of the present invention and the conventional chemical fertilizer or liquid fertilizer alone will be described in detail as follows.

Controls used in the experiments are shown in Comparative Examples 1, 2 and 3 below. Comparative Example 1 in which 90 kg / 10a of a chemical fertilizer generally used was applied to a rice paddy was compared with Comparative Example 2 in which 300 kg / 10 a of natural anhydrous gypsum was used singly, Comparative Example 2, and 300 kg / . Experiments of the lime silicate fertilizer according to the present invention are shown in Examples 1, 2 and 3, and the growth characteristics according to the rice varieties were examined with respect to rice and flavor, one of the rice varieties.

[Comparative Example 1]

In Comparative Example 1, 90 kg / 10a of a chemical fertilizer generally used is fertilized in paddy fields.

[Comparative Example 2]

In Comparative Example 2, 300 kg / 10a of a natural anhydrite, which is generally used, is fertilized in a paddy field.

[Comparative Example 3]

In Comparative Example 3, 300 kg / 10a of a commonly used blast furnace slag was applied to the paddy.

[Example 1]

In Example 1, the primary mixture (mixed with 1 part by weight of blast furnace slag with respect to 1 part by weight of natural anhydrous gypsum) was mixed with a liquid fertilizer and padded into paddy.

[Example 2]

In Example 2, the first mixture (mixed with 3 parts by weight of blast furnace slag with respect to 1 part by weight of natural anhydrous gypsum) was mixed with a liquid fertilizer to be used for paddy.

[Example 3]

In Example 3, the primary mixture (mixed with 0.3 part by weight of blast furnace slag with respect to 1 part by weight of natural anhydrous gypsum) was mixed with a liquid fertilizer to be used for paddy.

In order to examine the effect of the method of manufacturing the lime silicate fertilizer of the present invention in the above-mentioned Examples and Comparative Examples, the following experiment was conducted and the results are shown in FIG. 3 to FIG.

A. Length of plant length

In the present invention, the lengths of the growth stages of the growth characteristics of rice were compared using the above Examples and Comparative Examples.

FIG. 3 is a schematic diagram showing the lengths of rice paddies after use in Japanese rice according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3.

FIG. 4 is a schematic diagram showing the lengths of rice paddies after use according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3 in flavor.

The difference in the length of the plant length between the comparative examples and the examples was not largely observed, but the length of the plant length was somewhat longer in the comparative example. However, this is not recognized as a result of differences in plant length.

The reason for comparing the length of the plant length is that the longer the length of the plant length, the weaker the rice resistance of the rice.

N. Number of tears

In the present invention, the changes in the number of tillers in the growth characteristics of rice were compared using the above Examples and Comparative Examples.

FIG. 5 is a graph comparing changes in the number of tillers after use according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3.

Fig. 6 is a graphical representation of changes in the number of tins after use according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3;

As a result of comparison, the number of tillers tended to increase in Example 1, Example 2, Example 3, and Comparative Example 3 (using blast furnace slag) as compared with Comparative Example 1 over time after fertilizing.

The increase in the number of tillers can be a factor for increasing the rice yield, but it is also possible to estimate the possibility that the rice paddies will become more frequent due to poor breathability due to overburden.

C. Leaf color

In the present invention, the changes in leaf brightness among the growth characteristics of rice were compared using the above examples and comparative examples.

FIG. 7 is a graphical representation of changes in leaf color after use according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. FIG.

FIG. 8 is a graph comparing changes in leaf color after use according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. FIG.

Leaf color was measured at 2/3 point of the top completely developed leaves using a leaf color meter SPAD-502. If the chlorophyll content is kept low, the amount of gold in the rice is increased, which can be solved through the use of nitrogen fertilizer.

7 and FIG. 8, it was confirmed that the degree of leaf color was high when fertilized according to Example 1, Example 2, and Example 3 over time, Comparative Example 2 and Comparative Example 3 It was confirmed that the degree of leaf color was high when fertilized. It can be concluded that the use of blast furnace slag or natural anhydrous gypsum can secure a higher leaf color index than the result of using only simple fertilizer.

It can be judged that a sufficient amount of nitrogen necessary for rice cultivation can be secured when the natural anhydrous gypsum, blast furnace slag and fertilizer are mixed.

D. Number of rice

In the present invention, the yields of rice were compared using the above examples and comparative examples.

FIG. 9 is a graph comparing the yields of rice produced after using the rice according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. FIG.

Fig. 10 is a schematic diagram showing a comparison of rice yields produced after use in flavor according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. Fig.

In the case of Comparative Example 1 using only the basic fertilizer as a whole, the rice yield was the smallest at about 550 kg / 10a.

In the case of FIG. 9, Comparative Example 2, Comparative Example 3, Example 1 and Example 2 except for Example 3 showed a large amount of rice of about 600 kg / 10a.

In FIG. 10, the maximum amount of rice was about 600 kg / 10a in Example 1.

In both FIG. 9 and FIG. 10, the rice yield was higher when cultivated by the method of Example than Comparative Example 1 (control), so that when used alone or mixed with natural anhydrite and blast furnace slag, .

ㅁ. The incidence of paperback

In the present invention, the incidence of rice paddy disease was compared using the above Examples and Comparative Examples.

The above-mentioned paperback disease, also called sheath blight, occurs when the air temperature is high and the number of tears is high and the ventilation is not smooth in the summer, and it is a bottle infringing on the sheath, leaf blade, and acupuncture tree and has a round gray or dark gray circular or irregular pattern. Later, it becomes a grayish white color, and it is a bottle that is dried up from the lower leaves.

As shown in FIG. 11, the paperback disease rate was about 68% or higher in the case of using the comparative example 1, and the incidence rate in the case of using the example 1 and the example 2 was about 55% to 58% Respectively.

 As can be seen from FIGS. 5 and 6, the number of tillers in the rice cultivation was increased to increase the probability of developing a paperback disease. However, the incidence was lower than that in the rice cultivation, It is thought that it can come.

Therefore, it was confirmed that when the natural anhydrous gypsum and blast furnace slag were mixed with the liquid fertilizer, the growth characteristics and yield of rice were increased, but the incidence of paperback disease was decreased.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, All changes or modifications that come within the scope of the equivalent concept are to be construed as being included within the scope of the present invention.

S1: Powder production step
S2: First mixing step (natural anhydrous gypsum + blast furnace slag)
S3: Secondary mixture preparation step (primary mixture + fertilizer)
S4: immersion step (second mixture immersion)

Claims (1)

A first step of producing a natural anhydrous gypsum and a blast furnace slag with a fine powder of 50 탆;
A second step of mixing 2 parts by weight of the blast furnace slag with 1 part by weight of the natural anhydrous gypsum prepared as a fine powder through the first step to prepare a first mixture;
A third step of mixing 4 parts by weight of an animal liquid ratio with 1 part by weight of the primary mixture mixed through the second step to prepare a second mixture;
And a fourth step of immersing and aging the mixed secondary mixture through the third step,
The blast furnace slag comprises 0.07 part by weight of MgO and 0.81 part by weight of SiO _{2 based} on 1 part by weight of CaO,
The natural anhydrous gypsum comprises 0.0005 parts by weight of MgO and 0.0008 parts by weight of SiO2 based on 1 part by weight of CaO,
The animal manure is produced by fermenting an animal manure,
In the fourth step, the secondary mixture was aged for 96 hours at a room humidity of 60% and an indoor temperature of 15 ° C,
Wherein the fertilizer produced through the fourth step is sprayed in a rice field or a field after being formulated in the form of a 5 mm ring or pellet.

Images