KR100301699B1 - Granular Organic Silicate Fertilizer and Manufacturing Method of the Same - Google Patents

Abstract

PURPOSE: Provided is a spherical particulate type of organic siliceous fertilizer, produced by mixing gradually cooled slag generated as byproduct of iron industry with a binder and shaping the mixture into sphere, and a method for producing the same. CONSTITUTION: The organic siliceous fertilizer is produced by step of (i) mixing powder(obtained by crushing gradually cooled slag) consisting of coarse powder and fine powder in ratio of 6:4, (ii) shaping the mixture into spherical particulate which the coarse powder and fine powder are repeatedly adhered with binder, and (iii) cooling the particulate. The binder is black liquor, which is filtrate remaining after filtering a fiber in a paper mill.

Description

Granular Organic Silicate Fertilizer and Manufacturing Method of the Same}

The present invention relates to a spherical granular organic siliceous fertilizer which is formed into a spherical form by mixing a slow cooling slag generated as a by-product of the steelmaking or steel industry with a binder, and a manufacturing method thereof.

Silicate fertilizer has been reported to improve rice cell siliceous cell growth by increasing the yield of rice by 10%, and it is used as a soil modifier for acidified soils and to strengthen plant stems.

In addition, silicic acid is known to be essential for the application of nitrogen fertilizers by suppressing the excessive absorption of Fe and Mn elements in soil.

Conventional siliceous fertilizers are divided into powder and granular form.

Powder type siliceous fertilizer by slow cooling slag has good absorption effect of fertilizer, but when scattering occurs during fertilization, it is not only sanitary by worker's skin but also uncomfortable and uniform fertilization. In order to solve the phenomenon of avoiding the use of powder phase, but using a duster to solve this problem is still not a desirable solution due to the lack of dust and the like.

In addition, there is a needle-like fertilizer by quenching slag, so that scattering can be prevented, but the shape of the bed itself is damaging to the skin when fertilizing and its dissolution rate is higher than that of the slow cooling product. It was found that the dissolution time was not the same, so that the fertilizer was not effective and caused fertilizer loss, labor loss, and environmental pollution.

In particular, siliceous fertilizers from quenched slag are charged with steel, cocos, burying materials, etc. into the blast furnace and heated, and the components that are easy to reduce are melted and reduced to molten iron, and the hard-reducing components flow into the molten slag.

The molten slag is refined by pressure water or the like. When the cooling rate of several hundred degrees per second is quenched, a high vitrification rate is obtained.

It is composed of oxides such as soluble silicic acid, soluble lime and magnesium, which are fertilizers contained in the tissue components, and is made and used as granular organic siliceous fertilizer by spraying and reacting a binder such as amino acid fermentation dispersion waste liquid.

However, the conventional siliceous fertilizer has a drawback due to scattering in spite of the advantage that the fertilizer absorption effect is good in the powder form by slow cooling slag. There is a problem that this delay effect (41.6% of powder phase by slow cooling agent, 20.5% of tree material by quenching slag) falls.

The present invention, in the organic siliceous fertilizer, eliminates the above-mentioned problems, while mixing the powdery slow cooling slag with a binder to form spherical form, while taking advantage of the improvement of fertilizer absorption rate by the slow cooling slag, while handling the granular fertilizer. It is an object of the invention to provide a siliceous fertilizer with the advantages of ease of use.

The organic silicate fertilizer for achieving the above-mentioned purpose is to mix the powder obtained by pulverizing the slow cooling slag with the fine powder and the fine powder at 6: 4 and spray the binder inside the granulator, which is sprayed on the particle surface and rolled with the powder. It is made to change from small particles to larger particles and then dried. The manufacturing method includes a grinding process of obtaining powder of slow cooling slag as a main material, a mixing process of mixing coarse powder and fine powder of the powder, and spraying a binder on the powder. It consists of a spherical granulation process, a drying process to evaporate the moisture of the granulated particles, and a sorting, cooling and packing process.

In this case, the powder slag is not only a slow cooling slag powder but also a stainless slag powder or a quench slag, and when the powder slag is powdered, the same effect can be obtained. Recycling the filtrates that are discarded as industrial waste in various fields such as black liquor, alcohol from the alcohol concentration process, remaining alcohol dry liquor, and amino acid waste liquid generated from the filtrate after sugar is separated in the sugar production process. It also works.

Hereinafter, the spherical granular organic siliceous fertilizer of the present invention and a method for producing the same will be described in detail by Examples.

First, gangue powder in iron ore and coke is melted together with the molten material in the blast furnace, and the slow cooling slag obtained by slow cooling the produced slag is dried by a burner and a blower, and then pulverized by a pulverizer.

At this time, the powder particles are divided into coarse powder and fine powder by the particle size separation process, and the fine powder is pulverized to 28 mesh or less.

Here, the same effect can be obtained when the powder element, which is the main material, is formed of fine powder as in the case of using stainless slag or rapid quenching material.

Thus, the coarse powder and fine powder of the powdered slag obtained by the electrocrushing process are mixed by a mixer.

Since the soluble silicic acid content changes according to the particle size distribution, the mixing ratio of coarse and fine powder is 6: 4, which is most suitable. When the silicic acid content needs to be increased, the fine powder may be increased relatively.

The powder mixed in the above mixing process is put into the granulator and sprayed while rotating the granulator.

As a binder, in this embodiment, in order to obtain high quality cellulose from wood at the paper mill, NaOH and Na ₂ S are used as 7: 3 to extract the fiber from the wood, and the filtrate is black liquor made through an agricultural process. Was used.

The type of black liquor is divided into 20%, 40%, and 70% of the SOLID concentration in the concentration step, and the higher the concentration, the harder the temperature drops.

This 40% concentration of black liquor consists of 60% H ₂ O and 40% SOLID.SOLID contains 17.2% organic matter (mostly lignin) and 22.8% minerals (mostly Na ₂ SO ₄ , NaOH, Na ₂ S, Na ₂ CO ₃ Na related salts), the physical properties of the various salts are dissolved at 50 ℃ or more, the viscosity is 1.0 POICE (20 ℃), PH14, there is no problem in the nozzle spraying, dry It is fast and generates little pollutants when dried.

As another embodiment of the binder, the binder may also serve as a spirit concentrate and an amino acid waste solution.

Alcohol concentrate is prepared by dehydrating distilled waste liquid produced during alcohol production by alcohol raw materials such as rice, sweet potato, imported starch, rice barley, corn, and distilling it again, discarding steam, and condensate concentrated to dryness.

Its main component is 44 to 55% of water, 12 to 40% of crude protein, and is composed of other sugar component organics and N.P.K components.

Its physical properties are slightly different depending on the alcohol raw materials and methods of the alcohol company, but the liquid is used with a solid concentration of 25-40%, PH5.6, and there are grain residues. There is a risk of blocking, the drying time of the drying process is rather long, the amount of pollution generation is more than the black liquid, the strength after drying is lower than the black liquid.

Amino acid waste liquid, another binder, is used to separate and commercialize a desired sugar in the process of producing sugar, and is an amino acid waste liquid produced from the filtrate, and its constituents are 80 to 85% water and amino acid waste liquid (SOLID concentration 15 to 20% Its physical properties are liquid at room temperature, around PH65.3, and bad odor occurs when temperature rises, and when dry, the bonding strength is stronger than alcoholic concentrate and weaker than black liquor.

Disadvantages are that fertilizer dissolves in water, making it harder to loosen, leading to poor fertilizer efficacy.

When the granulator is rotated while spraying such a binder onto the mixed powder, the binder is adsorbed to the first seed material of the powder in the granulator, and the powder adheres to the surface, thereby rolling the granulator pan. Is formed, and gradually grows by the repetition and is formed up to a desired size.

The granulated particles formed by the above granulation process are dried to cure moisture and harden into strong particles by the properties of the binder.

The finished particles are sorted to the desired size and cooled and packaged to final completion.

The characteristics of the finished product are as follows.

1) Component value

(Unit:%)

Availability SIO ₂ Former Goto (MGO) Alkaline powder Organic matter Hazardous Ingredients Remarks Silicate granules (using black liquor) 27.36 3.62 47.58 3 NI: 0.03PPMCr: 0.02PPMTi: 0.52PPM Refer to the current credit report

2) Soil improvement effect: The existing siliceous fertilizer is PH9.7, and in the case of powder granulation, it is about PH10.5.

3) Strength of product: Strength is maintained over 3.0Kg when using binder black liquor.

(General fertilizer fertilizer strength 1-3 kg)

4) Good decay:

Excellent dissolving in water (degree of collapse: black liquor> alcohol concentrate> amino acid waste liquid)

5) Pollution degree

Pollution generation is superior to other binders

As described above, the present invention maintains the organic siliceous fertilizer effect using powdery slow cooling slag with good absorption effect, while making it easy to use by preventing the scattering by granulating it, and effectively cooling the slow cooling slag and black liquor which are industrial wastes. It is effective in reducing fertilizer loss, labor loss and environmental pollution by matching the dissolution rate of fertilizer with crop demand.

Claims (3)

A spherical granular organic siliceous fertilizer, characterized in that the powder obtained by pulverizing slow cooling slag is mixed with coarse powder and fine powder at 6: 4 and formed into spherical particles repeatedly bonded by a binder. Binder is a pulverization step of pulverizing the slow cooling slag as a main material to obtain a powder, a mixing step of mixing the coarse powder and the fine powder of the powder in a ratio of 6: 4, and black liquor, which is the filtrate remaining after extracting the fiber from the papermaking process. A method for producing spherical granular organic siliceous fertilizer, characterized in that the granulation process is spherical to form a spherical form, and the usual drying, sorting, cooling, and packaging processes. The method for producing a spherical granular organic siliceous fertilizer according to claim 2, wherein the binder is formed from the alcohol concentrate after extracting the alcohol in the alcohol concentration step.