KR20020071548A - The Composition and Manufacturing Method of Hwangtho of Brick using Waste Oyster Shell - Google Patents

Abstract

PURPOSE: A yellow earth brick composition using oyster shell is provided, which has high compression strength and yellow earth characteristics such as far infrared emission, temperature and humidity control and deodorization. CONSTITUTION: The yellow earth brick is manufactured by the following steps of: mixing 5-40wt.% of CaO(<=200mesh) recycled by washing shells, powdering and sintering at 500-1300deg.C, 20-60wt.% of yellow earth activated by drying at 300-980deg.C(heating rate 1.5-5.0deg.C/min.) and holding 1-5hrs., 20-60wt.% of blast furnace slag, and 1-20wt.% of TiO2; controlling water content to be 5-25%; compression forming it; drying it at 10-100deg.C for 1-3days.

Description

The composition and manufacturing method of Hwangtho brick using Waste Oyster Shell}

The ^- (ion Cl) The present invention, more particularly recent cause is saline attaching the oyster shell in a marine pollution relates to industrial waste of utilizing oyster shell granulation to construction material of yellow soil composition and a manufacturing method that can obtain a brick After removing and crushing, it is calcined at 500 ~ 1300 ℃ and then activated by using quicklime (CaO) and slag, byproduct of the steelmaking process, activated ocher, and titanium dioxide which causes catalysis. The present invention relates to a composition of ocher bricks using oyster shells which can obtain ocher bricks having better temperature and humidity control functions, far-infrared emissivity, and deodorization and adsorption performance than cement bricks.

In general, ocher bricks made of ocher material have sufficient strength and far-infrared emissivity, so when manufactured and used, the effects of temperature and humidity control and far-infrared efficacy can be obtained.

As related to the conventional ocher bricks, Patent Registration No. 029853, Patent Publication No. 2000-0012566, Patent Publication No. 2000-0033318 put the straw, organic binder, etc. using natural loess, the compressive strength 40 ~ 50kgf / ㎠ It is not water-resistant because of the degree, and in Patent Publication No. 1999-0064871 and Patent Publication No. 2000-0012566 are methods of adding cement, organic binder, etc. to supplement the strength, far infrared emissivity, deodorization, adsorption, temperature and humidity control functions Falling and the content of ocher is limited. In addition, a method of manufacturing bricks in which ocher, cement waterproofing agent, red iron oxide, etc. are mixed is disclosed in Korean Patent Laid-Open Publication Nos. 89-358, 85-5395, and 90-12862. There is a problem that the emissivity, deodorization and temperature / humidity control function is weak and lacks durability, abrasion resistance, safety, etc. and thus cannot be widely used.

The present invention for solving the conventional problems such as high stiffness while maintaining the characteristics of the original loess, high far-infrared emissivity and deodorization adsorption rate, and also using the oyster shells that currently act as a cause of marine pollution in Korea In order to meet the internationalization trend of environmental protection by lowering the cost of products, the present invention provides a composition of ocher bricks using oyster shells and a method of manufacturing the same, which can improve the competitiveness by lowering the product cost.

1 is a block diagram of the production process of loess brick according to the present invention.

In order to achieve the above object, the recycled quicklime, activated ocher and blast furnace slag of industrial by-products and titanium dioxide are added and mixed to correct the moisture to 5-25%, and press-molded with a vibration press to 10 ~ It is characterized by drying for 24 to 72 hours at 100 ℃. Recycled quicklime is washed with water to remove foreign substances and salt during oyster shell crushing, and then pulverized to calcination at 500 ~ 1300 ℃. At this time, care should be taken to grind the particles uniformly below 200 mesh. Activated ocher can prevent the occurrence of cracking by activating the natural ocher to a particle size up to 1.0mm or less, the surface may appear rough when the particle is more than 1.0mm.

Kneading with a mixer requires a uniform moisture content to eliminate particle size bleeding and double layers during molding. The composition of the ocher brick can be applied to the inner and outer walls of the existing building, it can be added to the tourmaline for the release function of the anion. The activation temperature of loess is 300 ~ 980 ℃, and the heating rate should be slowly heated to 1.5 ~ 5.0 ℃ / min when drying at high temperature. The optimum holding time after raising the maximum temperature is 1 ~ 5 hours.

Definitions and properties of materials used in the present invention are as follows.

[1] quicklime (raw materials that recycled shells)

Shellfish is a high-purity calcium carbonate of calcite or calcite crystals. Its pulverization and fine pore structure make it less volatile and accumulate in large quantities in a certain area of the coast. That is a great mineral material.

Oyster shells made from oyster farms are refined and processed to produce quicklime and slaked lime, and technology development using slag, which is an industrial by-product, expands the recycling range of oyster shells and slag that is disposed of in landfills and develops them as high value-added products. In addition, this technology development is urgently needed in consideration of environmentally stable and environmentally-friendly recycling aspects and environmental conservation aspects by developing environmentally friendly products that meet the characteristics of each application.

division Characteristics of quicklime using shell Adult and Mountain Gyeongnam, Jeolla South Coast chief ingredient Calcium Carbonate (CaCO ₃ ) Categories and Particles Powder level: 2400cm2 / g or more, Salinity: 1% or less Loss of ignition: 5% or less, Calcium oxide: 45% or more

[2] ocher

division Ocher properties Adult and Mountain It is produced by rock weathering, and the main mining place is mountain chief ingredient SiO ₂ : 35-50%, Al ₂ O ₃ : 25-40%, Fe ₂ O ₃ : 3-20% Categories and Particles Widely belongs to primary clays, particle size is assembled

[3] slag

division Slag properties Adult and Mountain Water Cooled Sludge chief ingredient SiO ₂ : 20 ~ 35%, CaO: 40 ~ 60%, Al ₂ O ₃ : 5 ~ 15% Categories and Particles Powder level 3200㎠ / g ~ 7600㎠ / g

[4] titanium dioxide

division Properties of Titanium Dioxide Adult and Mountain Calculation by titanium iron ore Manufacture by sulfuric acid method and chlorine method chief ingredient The main component is titanium dioxide, and the crystal phase is tetragonal, and there are titanium iron ore rutile and adiolite. Categories and Particles 0.1 ~ 4.1㎛, photocatalyst, antibacterial, deodorization, oxidative decomposition

[5] activated ocher compositions

division Characteristics of activated ocher composition Adult and Mountain It is formed by high temperature drying (300 ~ 980 ℃) of natural loess, and the mainly appearing phase is amorphous and its chemical activity is high. chief ingredient SiO ₂ : 45 ~ 55%, Al ₂ O ₃ : 30 ~ 45%, Fe ₂ O ₃ : 3 ~ 10%, TiO ₂ : 5 ~ 10% Categories and Particles Crystalline water is dehydrated by high temperature drying at 300 ~ 980 ℃, and it has pink color as porous ocher with high porosity and high absorption rate.

Hereinafter, the manufacturing method of the present invention will be described.

Clean water from oyster shells collected from the coast is pulverized to a particle size of 2 mm or less after removal of foreign substances, and calcined by heating to 500 ~ 1300 ℃.

A process for producing utilized quicklime and activated loess and the loess bricks of the present invention is shown in FIG.

When the blending ratio (proper ratio) of the present invention is based on 100 parts by weight of the entire ocher composite, the weight of ocher is 20 to 60%, the weight of slag is 20 to 60%, the weight of quicklime is 5 to 40%, and the weight of titanium dioxide. The part is composed of 1 to 20%, and the weight part for moisture adjustment is 5 to 25%, and then molded using a vibration press, and then maintained for 24 to 72 hours in the range of 10 to 100 ° C., followed by a wet curing. do.

(Example 1)

Deodorization Rate of Oyster Shell Ocher Bricks with Time

Elapsed time (minutes) Blank concentration (0cm) Sample concentration (0㎝) Deodorization rate (%) Early 500 500 - 30 480 90 81 60 470 60 87 90 450 40 91 120 440 30 93

(Example 2)

Elapsed time (minutes) Blank concentration (0cm) Sample concentration (0㎝) Deodorization rate (%) 0 500 500 - 30 480 220 54 60 470 200 57 90 450 180 60 120 440 170 61

(Example 3)

Measurement result of water absorption amount of test body

Test body Moisture proof Invented Oyster Shell Ocher Brick 66% Cement brick 13%

(Example 4)

Surface temperature change of brick

division Cement Brick Temperature (℃) Ocher brick temperature (℃) Heating process 34.93 36.29 30 minutes after heating 28.19 31.91 1 hour after heating 25.93 27.40

(Example 5)

Physical Characteristics of Loess and Ordinary Bricks

division Compressive strength (kgf / ㎠) Porosity (%) Far Infrared Emissivity (%) Oyster Shell Ocher Brick 204 39.57 92 Cement brick 250 12.00 79 Original ocher brick 40 Not measurable 89 Red brick 305 22.10 88

The ocher brick produced by the present invention has a compressive strength of 150kgf / ㎠ or more, far infrared emissivity is 92%, deodorization adsorption rate is 98%, which satisfies the KS standard for building bricks, and the building constructed with the ocher brick according to the present invention is another product. It has been shown to maintain the room temperature for a longer time than the constructed building, to remove odors with excellent adsorptive power, and to suppress the growth of bacteria with excellent antibacterial activity. In addition, by processing and processing the shell, which is the main cause of environmental pollution, and recycling it as building materials, it meets the current trend of environmental protection and secures product competitiveness. Above all, we will use our loess, our traditional building material, in modern architecture to change our residential environment.

Activated ocher brick using industrial by-products according to the present invention satisfies the physical properties suitable for building interior and exterior materials such as compressive strength, water absorption, porosity, etc., and maintains the indoor space at an appropriate temperature with excellent heat storage effect.

In addition, due to the characteristics of far-infrared radiation and excellent adsorption and antifungal properties, it provides comfortable conditions suitable for human beings.

In addition, by using shells that pollute our oceans, including the southern coast, as a building material, we can secure market competitiveness by lowering product prices than before while realizing an active environmental protection philosophy.

As mentioned above, the activated ocher bricks and ocher tiles have compressive strength and shrinkage ratio suitable for building and exterior construction. It has the effect that the interior is warm and moisture-free, removes odors with excellent adsorption power, suppresses the growth of bacteria such as molds with excellent antibacterial properties, and provides a comfortable and comfortable indoor space for our living environment.

Claims (5)

In ocher bricks composed mainly of ocher, titanium dioxide and the like; Oyster shell, characterized in that the mixture is prepared by mixing kneading ratio of recycled quicklime 5-40% by weight, activated ocher 20-60% by weight and industrial by-product blast furnace slag 20-60% by weight, titanium dioxide 1-20% by weight The composition of ocher brick utilizing. The method of claim 1; The recycled quicklime was washed with water to remove foreign substances and salt during oyster shell crushing, and then pulverized by crushing and then baked at 500 to 1300 ° C. The method of claim 1, Particles of the ocher brick utilizing the oyster shell, characterized in that the recycled quicklime particles are 200 mesh or less. In the manufacturing method of the ocher brick, After adding 5 ~ 40% of recycled quicklime, 20 ~ 60% by weight of activated ocher, 20 ~ 60% by weight of industrial blast furnace slag, and 1 ~ 20% by weight of titanium dioxide, adjust the moisture content to 5 ~ 25%. , Pressurized by vibrating press and the manufacturing method of the ocher brick using the oyster shell, characterized in that dried for 10 to 100 ℃ for 24 to 72 hours. The method of claim 4; The activation temperature of the loess is 300 to 980 ° C., and the temperature increase rate at the time of high temperature drying is about 1.5 to 5.0 ° C./min, and the optimum holding time after the temperature rise is 1 to 5 hours. Method of making bricks.