KR20210004141A - Method for manufacturing artificial fishing reef using shell - Google Patents

Abstract

The present invention relates to a method for producing an artificial reef using oyster shells. The method comprises: a first step of classifying oyster shells; a second step of drying the oyster shells; a third step of firstly baking the oyster shells at 800 to 850°C, and storing the same in a size of 4 to 6 mm; a fourth step of secondly baking the oyster shells at 900 to 925°C, and pulverizing the same to have a size of 0.01 to 0.05 mm; a fifth step of mixing the firstly baked and stored oyster shells and the secondly baked and pulverized oyster shells; a sixth step of combining mixed soil with the mixed oyster shells; a seventh step of adding and agitating the oyster shells combined with the mixed soil in water; an eighth step of removing inner air by introducing the mixture produced in the seventh step to a wedging table; a ninth step of drying the mixture, and then forming the mixture into a selective shape; a tenth step of firstly rough-baking the molded material at 800 to 900°C; an eleventh step of secondly rough-baking the firstly rough-baked molded material at 1100 to 1160°C; and a twelfth step of applying a glaze to the secondly rough-baked molded material and heating the same at 1250 to 1400°C. According to the present invention, aesthetics can be created.

Description

Method for manufacturing artificial fishing reef using shell}

The present invention relates to a method of manufacturing an artificial reef using an oyster shell, and more particularly, using an oyster shell to provide an artificial reef that can inhabit seaweed, shellfish, and aquatic organisms using a shell such as an oyster shell treated as waste. It relates to a method of manufacturing an artificial reef.

In general, about 250,000 to 300,000 tons of oyster shells are discharged every year in Korea, and they are classified as general waste and should be disposed of by farming fishermen. However, due to excessive costs such as securing a landfill, collecting shells and transportation costs, it is difficult for farming fishermen to dispose of them. There are difficulties.

In the case of currently occurring oyster shells, only about 20% of them are used for oyster seedlings and powder fertilizers, but the rest are left unattended or buried in coastal and public waters, causing environmental pollution.

Since most of the oyster shells are made of calcium carbonate, they were mainly used in the manufacture of products to consume large amounts of calcium. That is, oyster shells are mainly used as fertilizers using calcium carbonate and feed for poultry, or are mainly used in the production of calcium chloride, calcium carbide, and lime.

However, calcium chloride is mainly extracted from natural seawater, and some are obtained as a by-product during the production of soda ash using the Solvay method.However, when manufacturing oyster shells, it is difficult to recycle oyster shells, such as restrictions on economy, competitiveness and consumption. There are difficulties.

Artificial reefs are used as shelters, spawning sites, and habitats for fish, and as a fishing ground facility to increase fishery resources by artificially installing various structures in the ocean to proliferate fish, shellfish, and algae Recently, research has been continuously conducted as an alternative to improve the environment of seawater that is becoming deserted.

Conventional artificial reefs are a form of simply filling shells into a specific structure, and the structure formed of the main material as a frame is not flexible, so it cannot be installed between the bedrock where the seaweed rust occurs, and only in places where a flat space is secured nearby. As facilities are available, there is a disadvantage that the facilities are very limited.

In addition, there is a problem in that a safe habitat for small animals such as fish, crustaceans, etc. cannot be additionally provided due to the small space of various types in the facility, and the manufacturing cost per facility area is high.

In addition, in addition to these problems, existing artificial reefs are implemented in various shapes, but in general, hiding spaces or habitats such as fry that should be protected from pirates are not sufficiently provided, and floating objects in the sea accumulate to prevent attachment of aquatic vegetation or microorganisms. Problems have been raised that interfere.

Korean Patent Registration No. 10-0385477

The present invention was conceived to solve the above problems, and is environmentally friendly by using oyster shells and mixed soil, and it is easy to manufacture in various forms, so there is no facility site limitation, and a method of manufacturing an artificial reef using oyster shells that can create an aesthetic feeling Its purpose is to provide.

In addition, it is an object of the present invention to provide a method of manufacturing an artificial reef using an oyster shell in which a space in which aquatic vegetation can inhabit is sufficiently provided and that aquatic vegetation is easily attached.

In addition, by using oyster shells, which is a fishery waste to be discarded in large quantities, as the main material, the purpose of the purpose is to provide a method for manufacturing an artificial reef using oyster shells that can reduce the burden of handling oyster shells and recycle the wastes as resources. have.

The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. Can be.

A method of manufacturing an artificial reef using an oyster shell according to the present invention comprises: a first step of classifying an oyster shell;

A second step of drying the oyster shell; A third step of first firing the oyster shells at 800 to 850°C and storing them in a size of 4 to 6 mm; A fourth step of crushing the oyster shell to a size of 0.01 to 0.05 mm by secondary firing at 900 to 925°C; A fifth step of mixing the oyster shells stored by the first firing and the oyster shells crushed by the second firing; A sixth step of mixing the mixed soil with the mixed oyster shells; A seventh step of adding and stirring water to the oyster shell mixed with the mixed soil; An eighth step of injecting the mixture produced in the seventh step into a clay mill to remove air from the inside; A ninth step of drying the mixture and then shaping it into a selective shape; A tenth step of first priming the molded product at 800 to 900°C; An eleventh step of the second priming of the first primed molding at 1100 to 1160°C; And a 12th step of heating at 1250 to 1400° C. by applying the glaze to the second unglazed molding.

The first fired oyster shell in the third step and the second fired oyster shell in the fourth step are formed by mixing in a ratio of 2:1.

The mixed soil is at least two of kaolin, loess, pumice, white porcelain, sanbaek, sancheong, buncheong, celadon, onggi, dong terri, gounonggi, sculpture, gounjo, brown, and black soil. It characterized in that it includes the above.

In the sixth step, the mixed oyster shell and mixed soil are mixed in a ratio of 1:1.

It is characterized in that the eighth step is repeatedly performed for vacuum inside the mixture.

The method of manufacturing an artificial reef using oyster shells of the present invention by means of solving the above problems is environmentally friendly by using oyster shells and mixed soil, and it is easy to manufacture in various forms, so there is no facility site limitation, and there is an effect of creating an aesthetic feeling. .

In addition, there is an effect that sufficient space is provided for aquatic vegetation to inhabit, and attachment of aquatic vegetation is easy.

In addition, by using oyster shells, which are fishery wastes to be discarded in a large amount, as the main material, there is an effect of reducing the burden of treatment of oyster shells and recycling the discarded wastes as resources.

1 is a flow chart showing a method of manufacturing an artificial reef using an oyster shell according to an embodiment of the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by the embodiments. The same reference numerals in each drawing indicate the same member.

1 is a flowchart showing a method of manufacturing an artificial reef using an oyster shell according to an embodiment of the present invention.

First, a first step (S1) of classifying an oyster shell is performed. In order to classify the oyster shells into a size of 1 to 8 mm, the oyster shell is classified by firstly passing a 10 mm net and secondly passing an 8 mm net using a vibration device.

A second step (S2) of drying the classified oyster shell is performed. The oyster shell particle moisture is 9.6% (waste process test standard: 2017), and the oyster shell particle salt content is 410 mg/kg (test method: KS M 0180: 2009) to satisfy the conditions for at least 6 months to dry naturally.

A third step (S3) of first firing the naturally dried oyster shell and storing the resultant in a predetermined size is performed. The moisture content of the oyster shell is maintained at 0.14% (KPS-C-2019-002 Korea Powder Machinery). When the oyster shell is fired at 450 to 700°C, Cl 880mg/kg (test method: KS M 0180:2009), the oyster shell is fired at 850°C, Cl 560mg/kg (Test method: KS M 0180:2009), the oyster shell When fired at 925℃, CaO 93.5% (test method: KS L 9004: 2017 applied), MgO 1.85% (test method: KS L 9004: 2017 applied), SiO ₂ 0.60% (test method: KS L 9004: 2017 applied ), Al ₂ 0 ₃ 0.00% (test method: KS L 9004: 2017 applied), Fe ₂ 0 ₃ 0.04% (test method: KS L 9004: 2017 applied), Cl 850mg/kg (test method: KS M 0180: 2009), the oyster shell When fired at 1200°C, Cl was not detected (Test Method: KS M 0180:2009). The oyster shell is first calcined at 800 to 850° C. for 6 to 10 hours and cooled to satisfy the above conditions, and the resultant is stored in a size of 4 to 6 mm.

A fourth step (S4) of pulverizing the naturally dried oyster shell to a predetermined size by second firing the rest of the oyster shell except for the first firing is performed. The oyster shell is calcined at 900 to 925°C for 6 to 10 hours and cooled, and the resultant is pulverized to a size of 0.01 to 0.05 mm and stored.

Next, a fifth step (S5) of mixing the oyster shells stored by the first firing and the oyster shells crushed by the second firing is performed. It is preferable that the primary fired oyster shell and the secondary fired oyster shell are mixed in a ratio of 2:1.

The reason for mixing the primary fired oyster shell and the secondary fired oyster shell is that the pores of the large particles are filled with small particles, and the large particles on the surface are corroded and dissolved in the sea. There is an advantage that it is easy for aquatic vegetation to adhere due to the voids in the melted space. And, if the secondary fired oyster shell is not mixed, the resulting product is easily broken.

Next, a sixth step (S6) of mixing the mixed soil with the mixed oyster shell is carried out. The mixed oyster shell and the mixed soil are mixed in a ratio of 1:1.

The mixed soil is at least two of kaolin, loess, pumice, white porcelain, sanbaek, sancheong, buncheong, celadon, onggi, dong terri, gounonggi, sculpture, gounjo, brown, and black soil. It includes the above.

In one embodiment, the mixing of each soil included in the mixed soil is composed of a ratio of 1:1. For example, in order to prepare 1 kg of the mixed soil with kaolin, loess, pumice and white porcelain, 250 g of kaolin, 250 g of loess, 250 g of pumice and 250 g of white porcelain are mixed to prepare the mixed soil.

In another embodiment, the mixing ratio of soil may be selectively configured according to the intended use of the product. Depending on the soil to be mixed, the viscous force may be different, and the color may have different effects after priming.

Next, a seventh step (S7) of adding water to and stirring the oyster shell mixed with the mixed soil is performed. It is preferable to add about 10% of the water.

Next, an eighth step (S8) of removing air from the inside by introducing the mixture generated in the seventh step (S7) into a clay mill is performed. The earth mill is a type of mixer and is a device for sufficiently kneading clay or soil for molding such as ceramics and bricks, making the soil homogeneous and removing air bubbles contained in the soil. If the process is not carried out, abnormal shrinkage or cracks may occur after molding, and bubbles may expand during baking, causing damage to the items.

The mixture is put into the clay mill to knead the soil. To remove air inside the mixture, clay kneading may be repeatedly performed. After completely removing air from the mixture, it is produced in the form of cylindrical sludge. The mixture, which has undergone an earthwork process, is packaged in plastic for each size and stored in a pallet.

Next, after drying the mixture, a ninth step (S9) of molding into a selective shape is performed. The mixture may be molded into a standardized shape using a mold or manually molded into a desired shape. The shape of the molding can be variously changed. After naturally drying the molded product, it was maintained at room temperature for 30 minutes at 60°C, 90°C for 30 minutes, 120°C for 30 minutes, and 200°C for 30 minutes to remove moisture and then maintained at 300°C for 3 hours, Let it cool for 5 hours. If the product is cracked or one part is filled with glaze and dirt, knead enough.

Next, a tenth step (S10) of first priming the molded article is performed. The molded article is primed at 800 to 900°C for 48 to 55 hours. By unglazing the molded product, the absorbency and strength are increased, so that the glaze treatment and handling are safe. Cool the first rough molding sufficiently.

Next, the eleventh step (S11) of the second priming of the first priming molding is performed. The first primed molding is second primed at 1100 to 1160°C. Heat treatment at high temperature before glazing increases the strength of the secondary rough molding.

Next, a twelfth step (S12) of applying and heating the glaze to the secondary unglazed molding is performed. The glaze is applied to the surface of the second unglazed molding and heated at 1250 to 1400°C for 70 to 80 hours.

As for the properties of the glaze, the coefficient of thermal expansion should be substantially the same as that of the material of the second rough molding, and the melting point should be lower than that of the second rough molding material. When glazing is applied to the second unglazed molding, it melts and flows well when baked, and is in close contact with the secondary unglazed molding, thereby creating a thin glass film on the surface. When the glaze does not coincide with the expansion and contraction of the second rough molding, it may peel off or crack.

Glazes are generally transparent, but there are milky, colored, crystalline, unsalted, and cracked oils. The composition of the glaze differs in combination and composition depending on the sintering temperature and soil quality, and is generally classified into porcelain oil and pottery oil. The main component is a silicate compound, and it is used as a raw material that is calcined at a high temperature (1200-1500℃) like porcelain, and includes feldspar, quartz, limestone, kaolin, etc., and kaolin for firing at a low temperature (960~1000℃) like pottery. · Borax, feldspar, limestone, etc. are used.

The glaze component increases the strength of the second rough molding and smoothes the surface to prevent contamination. After heating is completed and cooled sufficiently, the production of artificial reefs using oyster shells is completed.

The following table shows the results of the eluted lead and eluted cadmium detection test of the product produced by the above method.

Test Items unit Baseline Test Methods Test result Eluted lead (Pb) mg/L 2 or less Food utensils and container packaging revolution Not detected Eluted cadmium (Cd)
mg/L 0.5 or less Food utensils and container packaging revolution Not detected

The material of the product was made of porcelain-other than a device for heating and cooking, and was used with a capacity of less than 1.1L.

As shown in Table 1, as the test items, it was confirmed that the eluted lead (Pb) and the eluted cadmium (Cd) were not detected as a result of inspecting the eluted lead (Pb) and eluted cadmium (Cd) by the rotation of food equipment and container packaging. Became.

As described above, within the scope of the basic technical idea of the present invention, many other modifications are possible for those of ordinary skill in the art, as well as the scope of the present invention to be interpreted based on the appended claims. will be.

S1. The first step to classify oyster shells
S2. The second step of drying the oyster shell
S3. The third step of first firing the oyster shell and storing it in a predetermined size
S4. The fourth step of crushing the oyster shell to a predetermined size by secondary firing
S5. A fifth step of mixing the oyster shells stored by the first firing and the oyster shells crushed by the second firing
S6. 6th step of mixing mixed soil to the mixed oyster shell
S7. The seventh step of adding and stirring water to the oyster shell mixed with the mixed soil
S8. The eighth step of removing air from the inside by introducing the mixture produced in the seventh step into a clay mill
S9. After drying the mixture, the ninth step of molding into a selective shape
S10. The tenth step of first priming the molded article
S11. The eleventh step of the second priming of the first primed molding
S12. 12th step of applying and heating the glaze to the second unglazed molding

Claims (5)

A first step of classifying an oyster shell;
A second step of drying the oyster shell;
A third step of first firing the oyster shell at 800 to 850° C. and storing it in a size of 4 to 6 mm;
A fourth step of crushing the oyster shell to a size of 0.01 to 0.05 mm by secondary firing at 900 to 925°C;
A fifth step of mixing the oyster shells stored by the first firing and the oyster shells crushed by the second firing;
A sixth step of mixing the mixed soil with the mixed oyster shells;
A seventh step of stirring by adding water to the oyster shell mixed with the mixed soil;
An eighth step of injecting the mixture produced in the seventh step into a clay mill to remove air from the inside;
A ninth step of drying the mixture and then shaping it into a selective shape;
A tenth step of first priming the molded product at 800 to 900°C;
An eleventh step of the second priming of the first primed molding at 1100 to 1160°C;
A method for manufacturing an artificial fish reef using an oyster shell, comprising: a 12th step of applying a glaze to the secondary unglazed molding and heating at 1250 to 1400°C. The method of claim 1,
The first sintered oyster shell in the third step,
The second sintered oyster shell in the fourth step is a method of manufacturing an artificial fish reef using an oyster shell, characterized in that the mixture is composed of 2:1. The method of claim 1,
The mixed soil,
Includes at least two of kaolin, loess, pumice clay, white porcelain, mountain white clay, sancheong soil, buncheong soil, celadon clay, pottery soil, dong territorial soil, goun pottery soil, sculptural soil, fine sculptural soil, brown sculptural soil, and black soil A method of manufacturing an artificial reef using an oyster shell, characterized in that. The method of claim 1,
In the sixth step,
The mixed oyster shell and mixed soil are prepared by mixing in a ratio of 1:1. The method of claim 1,
The method of manufacturing an artificial fish reef using an oyster shell, characterized in that repeatedly performing the eighth step for vacuum inside the mixture.

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