KR101966942B1 - Basic granular manure for improving the soils using the limestone sludge and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a method for improving the quality of soil by using limestone sludge, which is an industrial by-product produced in a steel making process, as well as protecting the environment and reducing the manufacturing cost of fertilizer and containing ingredients useful for crop cultivation. Sludge and limestone dust to prepare a fertilizer for soil improvement using a raw material containing 45 to 60 parts by weight of calcium oxide (CaO), preparing limestone sludge and limestone dust generated in a steelmaking process by receiving and supplying the limestone sludge and limestone dust; Mixing the prepared limestone sludge and limestone dust with raw materials including 45 to 60 parts by weight of calcium oxide; And mixing the raw material with a binder to produce a fertilizer for soil improvement using the limestone sludge.

Description

TECHNICAL FIELD The present invention relates to a fertilizer for improving soil using limestone sludge and a method for manufacturing the same,

The present invention relates to a fertilizer for improving soil using limestone sludge and a method for producing the fertilizer, and more particularly, to a fertilizer for limestone sludge which can effectively improve acidic soil using limestone sludge as an industrial by- The present invention also relates to a granular fertilizer for the improvement of basic soil using the limestone sludge and a method for producing the same.

Generally, fertilizer is used to increase the productivity of the land and promote the growth of the plant by sprinkling it on the cultivated land. It is a nutrient that directly feeds the soil and the plant for the purpose of maintaining or promoting the productivity of the soil, , Which improves the physical chemistry of the soil and promotes beneficial microorganisms even if it does not directly form the nutrients of the crops, it can change the form of nutrients that could not be used in plants in the soil into available form, reduce the toxicity of toxic substances, It is a substance that helps grow crops and is manufactured in various forms and used.

These fertilizers are classified into fertilizers and special fertilizers in accordance with Korea's Fertilizer Control Law. Specifically, ordinary fertilizers are classified into inorganic fertilizers (inorganic nitrogen fertilizers, inorganic fertilizers, etc.) based on the three elements of nitrogen, phosphoric acid, It is classified into mineral fertilizer, inorganic potassium fertilizer), compound fertilizer, organic fertilizer, calciferous fertilizer, silicate fertilizer, magnesium fertilizer and boron fertilizer. Special fertilizer is classified into various self fertilizer including fertilizer and byproduct fertilizer However, it does not comply with certain standards and is classified as necessary.

Here, when cultivating crops, the use of only acidic fertilizers (for example, silicate fertilizers) in various types of fertilizer or cultivation of crops in acidic soil for a long period of time causes the pH of the soil to drop, Alumina, manganese oxide and the like are increased, resulting in detrimental effects such as malfunction of roots of the crops.

In addition, crops grown in rice fields and fields have a strong resistance to acidic soil, but their degree is not very high, and various other crops are generally weak against acidic soil so that when grown continuously, crop growth, It is necessary to improve the acidic soil.

In recent years, there has been a plan for continuous and renewal of soil quality by adding basic fertilizer. That is, in order to improve the soil of the acidified soil, agricultural basic fertilizer containing lime (Ca) ingredient and magnesia (Mg) ingredient, which are main ingredients of soluble invasion, is manufactured and used.

As a representative basic fertilizer in relation to the conventional basic fertilizer described above, there is a green pear which is blended with phosphorus, serpentine or galan, etc. in a ratio of 100: 80 to 100: 90.

However, when the above-mentioned conventional green pearl is used for a soil having a low pH due to the use of conventional chemical fertilizers, the fertilizer decomposes organic matter in the process of propagating weak bacteria such as general acid, (CaO) and magnesium oxide (MgO), which are essential components of the soil, are used for the components such as calcium oxide and magnesium oxide There is a problem that the reduction remains in a state in which the reduction is insufficient.

Generally, fertilizer is classified into powder fertilizer and granular fertilizer. In case of powder fertilizer, absorption effect on soil is good, but scattering phenomenon occurs during fertilization, so that it is burdened on workers' skin and is not unsanitary. It is difficult to uniformly apply fertilizer, so that the use of powder fertilizer has been avoided. Thus, although the fertilizer is used for fertilizing with a spreader or the like, dust is still generated from the fertilizer and the cost of using the spreader is increased. In addition, in the case of granular fertilizer (Patent No. 10-0445536), it is possible to prevent scattering in fertilization, but since a separate grinding process is required to produce granular products, economical efficiency and natural environment may be contaminated .

On the other hand, limestone dust, which is a by-product of calcination of limestone sludge and limestone, which is an industrial by-product generated in a steel making process using limestone ores, is difficult to recycle and is mainly used in the sea or in the cement manufacturing process. Of the total amount of the water is increased, causing pollution of the working environment such as environmental pollution and dust generation.

The present invention has been made to solve the above problems and it is an object of the present invention to provide a fertilizer containing a large amount of calcium oxide (CaO), which is useful for cultivating crops, It is an object of the present invention to provide a fertilizer and a manufacturing method thereof.

Another object of the present invention is to provide a granular fertilizer which is produced by using limestone sludge which is an industrial by-product produced in a steelmaking process, thereby protecting the natural environment and efficiently reducing the manufacturing cost, The present invention provides a fertilizer for soil remediation using limestone sludge and a method for producing the same, which does not require a separate crushing manufacturing process, thereby enhancing the economical efficiency of the production of the product.

In order to achieve the above object, the present invention provides a method of manufacturing a limestone sludge, comprising: (S1) preparing and supplying limestone sludge and limestone dust generated in a steelmaking process;

(S2) mixing the limestone sludge and the limestone dust prepared in the step S1 to prepare a raw material;

Drying the raw material produced in the step S2 (S3); And

And mixing the raw material dried in step S3 with a binder (S4). The method of manufacturing fertilizer for soil improvement using limestone sludge according to claim 1,

In one embodiment of the present invention, the raw material is characterized in that limestone sludge and limestone dust are mixed at a mixing weight ratio of 9: 8: 1 to 2: 1.

In another embodiment of the present invention, the binder includes at least one selected from the group consisting of molasses, starch, and water.

In addition, the present invention provides a fertilizer for soil improvement using limestone sludge produced according to the above production method.

In one embodiment of the present invention, the soil improvement fertilizer has a strength of 88 N or more.

According to the fertilizer for improving soil using the limestone sludge according to the present invention and the method for producing the same, the granular fertilizer is produced by using the limestone sludge appropriately constituted of calcium oxide and the like, so that fertilization is easy and the acid soil is advantageously improved It is easy to cultivate the crops, thereby enhancing the merchantability and effectively improving the soil quality, thereby maximizing fertilization efficiency.

Also, the fertilizer for the soil improvement using the limestone sludge according to the present invention and the method for producing the same are produced by recycling the limestone sludge, which is an industrial by-product produced in the steel making process, as granular fertilizer, thereby protecting the natural environment, .

According to the fertilizer for improving soil using the limestone sludge according to the present invention and the method for producing the same, a separate crushing process for producing the granular fertilizer is unnecessary, thereby improving the economical efficiency of the production of the product, Competitiveness can be increased.

Figure 1 shows the growth of crops produced using the method of the present invention.
Fig. 2 shows experimental results of the crops produced using the method of the present invention.
FIG. 3 shows experimental results of a greenhouse produced by using the method of the present invention.

The present invention is characterized by a technical constitution of a fertilizer for soil improvement using limestone sludge and limestone dust, which are industrial byproducts generated during a steelmaking process.

That is, the present invention provides a method of manufacturing a limestone sludge, comprising: (S1) preparing and supplying limestone sludge and limestone dust generated in a steelmaking process;

(S2) mixing the limestone sludge and the limestone dust prepared in the step S1 to prepare a raw material;

Drying the raw material produced in the step S2 (S3); And

(S4) mixing the raw material dried in the step S3 with a binder,

The present invention provides a method for producing fertilizer for soil improvement using limestone sludge, wherein the raw material comprises 45 to 60% by weight of calcium oxide as a main component.

Wherein the raw material is mixed with limestone sludge and limestone dust in a mixing weight ratio of 9 to 8: 1 to 2, wherein the raw material comprises 45 to 60 wt% of calcium oxide, 0.5 to 1 wt% of silicon dioxide (SiO 2) (Al2O3) 0.1-0.3 wt%, iron oxide (Fe2O3) 0.05-0.2 wt%, potassium oxide (K2O) 0.01-0.1 wt%, magnesium oxide (MgO) 0.3-0.5 wt%, manganese oxide (MnO) 0.03% by weight, sodium oxide (Na2O) 0.1-0.2% by weight, phosphorus (P) 0.01-0.02% by weight, sulfur (S) 0.05-0.2% by weight and the remainder.

The binder may include at least one selected from the group consisting of molasses, starch, and water. The binder may be a binder using 60% molasses and a binder using 2 to 3% alpha starch .

In addition, the soil improvement fertilizer is characterized by comprising a limestone sludge which is a highly alkaline clay limestone having a pH of 10 to 12 and an index of hydrogen ion concentration, and a fertilizer for soil improvement using limestone dust.

In addition, the fertilizer for soil improvement has a spherical shape and a technical feature of a soil improvement fertilizer using limestone sludge and limestone dust having a particle size of 2 to 5.0 (mm).

It is preferable that the raw material has a water content of 1.5 to 2.5% in view of the yield of the fertilizer product.

The fertilizer for soil improvement according to the present invention has a strength of 88N or more and is confirmed directly by the examples. The fertilizer for soil improvement according to the present invention maintains its shape well and maintains excellent soil improving effect when used in soil .

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the following examples.

[Example]

Example 1. Preparation of lime fertilizer

Limestone sludge and limestone dust were used as basic raw materials for making lime fertilizer.

The chemical components of the raw materials are shown in Table 1 below.

Name of sample SiO ₂ Al ₂ O ₃ CaO Fe ₂ O ₃ K ₂ O MgO MnO Na ₂ O P S TiO ₂ Limestone sludge 0.52 0.14 53.30 0.09 0.05 0.42 0.02 0.15 tr 0.009 0.01 Limestone dust 2.82 0.82 52.96 0.43 0.08 0.56 0.02 0.08 0.016 0.744 0.04

The raw materials were mixed at 9: 1 and 8: 2, and chemical components of the mixed raw materials were as shown in Table 2 below.

Name of sample SiO ₂ Al ₂ O ₃ CaO Fe ₂ O ₃ K ₂ O MgO MnO Na ₂ O P S TiO ₂ Limestone sludge (9: 1) 0.75 0.21 53.26 0.13 0.05 0.43 0.02 0.14 tr 0.08 0.02 Limestone sludge (8: 2) 0.98 0.28 53.23 0.16 0.05 0.45 0.02 0.13 tr 0.16 0.02

The above mixed raw materials were mixed with the binder according to the ratios shown in Table 3 below. The amount of the binder used was 3 wt% or 4 wt%, and the raw material was mixed at 9: 1 or 8: 2 to make the raw material 97 wt% or 96 wt%.

division Raw material
(Mixing weight ratio) bookbinder(%) Raw moisture
(%) Binder usage
(%) Product yield
(%) Limestone sludge Limestone dust molasses Starch water One 9 One 7 - 3 2 3 89 2 8 2 7 - 3 88 3 9 One 7 - 3 4 83 4 8 2 7 - 3 85 5 9 One - One - 3 83 6 8 2 - One - 82 7 9 One - One - 4 84 8 8 2 - One - 81 9 9 One - 2 - 3 84 10 8 2 - 2 - 81 11 9 One - 2 - 4 86 12 8 2 - 2 - 82

As shown in Table 3, 30 g (3% by weight) of binder was prepared by mixing molasses and water, and 970 g (97% by weight) of raw materials were prepared by mixing the raw materials in the mixing ratio shown in the table. The prepared raw materials were mixed. The mixed material was placed in a mechanical equipment (Briquetting Machine, Jung Hyun Machine), and fertilizer was produced by briquetting under a pressure of 250 kgf / cm ² . The grooves of the briquetting rolls were circular, having a width of 5 mm and a depth of 1.5 mm, and the rolls were intermeshed to obtain a falling fertilizer.

The yield of the obtained fertilizer was measured and the yield was calculated on the basis of 1 kg of the material. As shown in Table 3, the yield was more than 81%, indicating that the yield was excellent.

Example 2. Determination of strength of lime fertilizer

In this example, the strength of the fertilizer prepared in Example 1 was checked. The strength was measured using a compressive strength meter (UTM). The results are shown in Table 4 below.

division burglar
(N) One 95 2 91 3 100 or more 4 100 or more 5 89 6 88 7 100 or more 8 100 or more 9 100 or more 10 100 or more 11 100 or more 12 100 or more

As a result, it was confirmed that the strength was 88 N or more and the strength of the fertilizer was excellent.

Example 3 Confirmation of Growth Effect of Lettuce Using the Fertilizer of the Present Invention

3.1. Experimental Method

The fertilizer produced in Example 1 was examined for the effect of growth on lettuce. The experimental method was carried out in accordance with the "Standards and methods for cultivation test (July 1, 2013)" of the "Fertilizer Testing and Research Institute" designated by the Rural Development Administration, and lettuce (red skirt) was used as the test crop. Conditions for the experiment are shown in Table 5 below.

Test preparation Processing contents Growth effect test Standard amount Volume Disclosure form (closed meeting)
Soil blending treatment Formulated pre-mix treatment
(Untreated, standard amount, volume) 50kg / 10a 100kg / 10a No treatment - - -

The lettuce was grown in a vinyl house, sown on March 2, 2017, and the planting distance was 20 × 20 cm. The number of treatments was 3, the number of repetitions was 3, the number of muzzle was 9, and the area per one was 20 m ² .

In order to confirm the physicochemical properties of the above-mentioned fertilizer, it was inspected by the method of "quality control method of fertilizer (the physicochemical test method of fertilizer)" of Notification No. 2013-29 of Rural Development Administration.

Inspection ingredient item pH Active ingredient Organic matter
Nitrogen total amount
Total phosphoric acid
Whole carly
Soluble lime
Availability Goto
Soluble silicic acid receptivity
Trace element Fe
Zn
Cu
Mn Harmful component Non-ox
Nickel
chrome
Titan
Nitrite
Ahyanghwan
Cadmium

The chemical properties of soil treated with fertilizer (analysis by "Rural Development Administration Soil Chemical Analysis Method") were confirmed and are shown in Table 7 below.

division pH
(1: 5) EC
(ds / m) CEC
(cmol _c / kg) OM
(g / kg) Total nitrogen
(g / kg) Ave.
P ₂ O ₅
(mg / kg) K Ca Mg Test substance ---- cmol ⁺ / kg ---- boron molybdenum Soil before testing 5.72 0.72 2.44 10.1 1.67 421 0.11 0.92 0.87 a very small amount a very small amount Soil after testing 6.65 0.83 4.27 10.4 1.90 662 0.39 1.36 1.24 a very small amount a very small amount

The same soil was used for the test in-port test.

3.2. Experiment result

The results of the statistical processing are shown in Table 8 below.

Source DF (degrees of freedom) Square mean F ratio Prob> F * LSD _(0.05) Total number of trees per week (No.) 2  2.20 31.59 0.004 ^*** 0.46 Leaf per week (㎝) 2  1.87  9.63 0.029 ^** 0.77 Fresh weight per week (g) 2 89.81 90.07 <0.001 ^*** 1.74 Root weight per week (g) 2 12.60  3.72 0.122 ^* 3.20

^{*, **, and ***} indicate significance at 5, 1, and 0.1%, respectively.

The results of confirming the growth effect of lettuce are shown in Fig. As can be seen from Fig. 1, it was confirmed that when the reference amount was treated as compared with the untreated group, there was an excellent growth effect.

The total number of leaves per week, leaf per week, fresh weight per week, and root per day weight were calculated and shown in Tables 9 to 12 below.

Test preparation Total number of leaves per week (No): LSD _(0.05) = 0.46 Repetition I Repetition II Repetition Ⅲ Average Level (significant difference) Disclosure: 22.1 22.7 22.5 22.4 a Disclosure: 21.7 22.0 22.1 21.9  b No treatment 20.7 20.5 21.1 20.8   c

Test preparation Leaf length (cm) per week: LSD _(0.05) = 0.77 Repetition I Repetition II Repetition Ⅲ Average Level (significant difference) Disclosure: 22.8 22.6 22.4 22.6 a Disclosure: 21.4 21.7 22.5 21.9 a No treatment 21.1 20.5 21.5 21.0  b

Test preparation Fresh weight per gram (g): LSD _(0.05) = 1.74 Repetition I Repetition II Repetition Ⅲ Average Level (significant difference) Disclosure: 63.5 63.6 62.8 63.3 a Disclosure: 63.0 61.5 64.3 63.0 a No treatment 53.0 53.1 54.9 53.7  b

Test preparation Root weight per gram (g): LSD _(0.05) = 3.20 Repetition I Repetition II Repetition Ⅲ Average Level (significant difference) Disclosure: 22.3 19.3 18.7 20.2 a Disclosure: 21.5 18.8 21.9 20.6 a No treatment 15.6 17.8 17.4 16.9  b

As can be seen from the above Table 9, when the fertilizer of the present invention was treated, the largest number of leaves were observed, confirming that the fertilizer of the present invention had an effect of promoting growth.

As shown in Table 10, the leaf length was also the longest when the fertilizer of the present invention was treated. As shown in Table 11 and Table 12, the fresh weight of the ground and the root showed a significantly superior weight It was also confirmed that the fertilizer of the present invention has an effect of promoting growth.

In other words, when the fertilizer of the present invention was admixed with the standard amount and the amount of the fertilizer, the lettuce was planted in the soil and the growth effect was examined. As a result, the total leaf number per week was 107.7%, leaf length was 107.6%, ground weight was 117.9% Root weight gain was 119.5%, which was statistically significant in all survey items.

Example 4. Identification of symptoms compared to crops using the fertilizer of the present invention

3.1. Experimental Method

In order to confirm whether the fertilizer of the present invention exhibited symptoms, tests were conducted on five crops as shown in Table 13 below.

Test preparation Processing contents Growth effect test Standard amount Volume 4 times Disclosure formula
(Closed session) Soil blending treatment 0.25 g / 250 g 0.5 g / 250 g 1.0 g / 250 g No treatment - - - -

The types and varieties of the test crops are shown in Table 14, and 0.25 g, 0.5 g and 1.0 g of each formulation were mixed with 250 g of the soil with the standard amount, The results were compared with those of the control group. The transplanting crops were sown in the greenhouse by sowing the seeds in the seedling tray. All test crops were grown in a greenhouse and water was given one to three times a day.

division Test crops (varieties) Sowing date Full day Processing date Date of investigation Sowing crop Bean Beans (Seolite) February 21 - - April 11, 13, 15 Handbook Barley (barley) February 21 - - April 11, 13, 15 Crucifixion Heat (feast heat) February 21 - - April 11, 13, 15 Transplant crop Park and Meron (Earls Choice) February 21 April 11 April 14, 16, 18 Crucifixion Chinese cabbage (Miss Jean) February 21 April 11 April 14, 16, 18

A plastic port was used for the test port, a circular port with a diameter of 10 cm and a height of 12 cm was used, and a port soil was used as an ineffective packed soil.

 The placement of the test strips was done with 3 repetitions of the complete randomization method, with 5 ports per repetition. The number of test ports and ports per test crop is as follows.

Standard amount Quantity 4 times No treatment Number of ports 5 5 5 5 Number of repeats 3 3 3 3

Compared to the number of leaves on the leaves of the plants on the day of investigation, the symptoms of the symptoms and the symptoms of the growth disorders were divided into 6 stages from 0 to 5 according to the "Rural Development Administration Test Methods and Review Standards". And 0 for non-asymptomatic cases and 5 for over 50%.

As of April 11, 2017, there were no symptoms compared to the results of the survey on seed crops, and the official crops were observed from April 18,

process Test crops (varieties) Survey day (About 0 to 5) Judgment Standard amount Volume 4 times Disclosure formula
(Closed session)
Beans (Seolite) April 11 0 0 0 No comparison April 13 0 0 0 No comparison April 15 0 0 0 No comparison Barley (barley) April 11 0 0 0 No comparison April 13 0 0 0 No comparison April 15 0 0 0 No comparison Heat (feast heat) April 11 0 0 0 No comparison April 13 0 0 0 No comparison April 15 0 0 0 No comparison Meron (Earls Choice) April 14 0 0 0 No comparison April 16 0 0 0 No comparison April 18 0 0 0 No comparison Chinese cabbage (Miss Jean) April 14 0 0 0 No comparison April 16 0 0 0 No comparison April 18 0 0 0 No comparison

A photograph of the crop according to the above experiment is shown in Fig. As can be seen in FIG. 2, it can be seen that the growth was satisfactorily performed. As can be seen from FIG. 3, it was confirmed that the symptoms did not appear even when the fertilizer of the present invention was used.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (5)

(S1) preparing and supplying limestone sludge and limestone dust generated in a steelmaking process;
(S2) mixing the limestone sludge and the limestone dust prepared in the step S1 to prepare a raw material;
Drying the raw material produced in the step S2 (S3); And
(S4) mixing the raw material dried in the step S3 with a binder,
The raw material is characterized in that limestone sludge and limestone dust are mixed in a mixing weight ratio of 9: 8: 1 to 2,
Wherein the raw material comprises 45 to 60 wt% of calcium oxide, 0.5 to 1 wt% of silicon dioxide (SiO ₂ ), 0.1 to 0.3 wt% of aluminum oxide (Al ₂ O ₃ ), 0.05 to 0.2 wt% of iron oxide (Fe ₂ O ₃ ) (K ₂ O), 0.3 to 0.5 wt% of magnesium oxide (MgO), 0.01 to 0.03 wt% of manganese oxide (MnO), 0.1 to 0.2 wt% of sodium oxide (Na ₂ O) 0.01 to 0.02% by weight of sulfur (P), 0.05 to 0.2% by weight of sulfur (S), and the balance of raw materials.
delete The method according to claim 1,
Wherein the binder comprises at least one selected from the group consisting of molasses, starch, and water.
A fertilizer for soil improvement using limestone sludge produced according to the method of claim 1 or 3.
5. The method of claim 4,
The fertilizer for soil improvement using limestone sludge according to any one of the preceding claims, wherein the fertilizer for soil improvement has a strength of 88 N or more.

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