KR20000063216A - The method for recycling of construction materials for waste using inorganic matter - Google Patents

Abstract

PURPOSE: A reclaiming process for building material and construction material by mixing aluminium hydroxide, polyaluminium chloride, boric acid, lignin sulfonic acid, silica-based surfactant and water and agitating the obtained inorganic additive with waste is provided which can contribute to economize resources and resolve environmental problems. CONSTITUTION: The process comprises preparing an inorganic additive by mixing 5 parts by weight of aluminium hydroxide, 5 parts by weight of polyaluminium chloride, 0.5 parts by weight of boric acid, 5 parts by weight of lignin sulfonic acid, 0.5 parts by weight of a silica-based surfactant and 84 parts by weight of water; mixing 80 to 85 parts by weight of general waste such as dust, mineral material, waste sludge and incineration ash with 2 to 4 parts by weight of a mixture of 7 to 10 parts by weight of magnesium oxide powder, 0.5 to 1 parts by weight of calcium oxide, 0.5 to 1 parts by weight of gypsum, 0.5 to 1 parts by weight of calcined lime and 0.5 to 1 parts by weight of white cement for about 5 min at 50 to 100 rpm in a mixer; melting magnesium chloride in water at 25 to 30°C, mixing the above mixture and kneading; and finally mixing 1 parts by weight of a liquid inorganic additive obtained by mixing 5 parts by weight of aluminium hydroxide, 5 parts by weight of polyaluminium chloride, 0.5 parts by weight of boric acid, 5 parts by weight of lignin sulfonic acid, 0.5 parts by weight of silica-based surfactant and 84 parts by weight of water and agitating for 5 min at 50 to 100 rpm.

Description

{The method for recycling of construction materials for waste using inorganic matter}

The present invention relates to a method for recycling industrial wastes using inorganic additives to building materials and civil engineering materials. In detail, the inorganic additives of the present invention are magnesium oxide (MAGNESIUM OXIDE MgO) and magnesium chloride (MgCl ₂ ), calcium oxide, Gypsum (CaSO ₄ , 1/2 H2O), lime, white cement, etc., designation of powder and liquid state, and how to recycle wastes using inorganic additives that are mixed with general wastes as building materials to construction materials and civil engineering materials will be.

The waste treatment methods adopted so far have been limited to four methods: sedimentation, landfilling, dumping at sea and incineration. These four methods do not ultimately solve environmental problems. The first three methods, sediment, landfill, and ocean dumping, do not actually remove pollutants but are concentrated in dispersed places, and only move places from land to land to land to sea. It may cause soil deterioration and water pollution of groundwater. Incineration of waste, the fourth and last method, pollutes the air when it is open, and leaves common and fly ash that require reprocessing when it is enclosed. Therefore, there is a request for the development of new technologies that can actually completely remove or purify these wastes or recycle them into other useful materials. However, no clear technological developments have been made. The technologies developed so far have not been proven to be effective or economical. Almost all of the technology is not actually used.

Korean Patent Application Publication No. 99-83777 describes a method of manufacturing civil construction materials such as bricks by mixing cement with particles obtained by incineration residues, sludge, combustion materials, and construction waste materials of household waste and industrial waste.

Korean Patent Publication No. 94-4779 discloses a composition for building materials mainly containing waste lime, cement, water and surfactants,

Korean Laid-Open Patent Publication No. 99-64880 describes a method of manufacturing building bricks by kneading sand, crushed lime, cement, and water from a building demolition concrete material,

Korean Patent Publication No. 99-31805 discloses a lightweight building material using waste lime using waste lime, waste foundry sand, clay and sand,

The conventional techniques are related to the manufacturing method of building materials using waste or there is a problem in actual commercialization, and there is a problem that the technique is not utilized because the effect is not proven.

The designated (specific) and general wastes from various industries are buried in some landfills after incineration at incinerators, but they are left in the waste incinerators due to excess profitability and landfill costs, and contaminate the surrounding environment. In order to fundamentally solve these problems, it is a technical task of the present invention to manufacture, recycle and commercialize various construction and construction civil engineering materials after solidifying industrial waste using additives.

Waste solidification treatment technology can also be referred to as purification treatment, in the process of solidifying the waste, all the decay material in the waste is removed and dehydrated, bacteria and various viruses die, no toxic gas and smelly gas. The new parent materials are mixed with the wastes and the mixtures are then formed into a stone-hard material with anti-corrosion properties by water absorption of about 10% and new alkalis and brine after an exothermic reaction.

The resulting product does not expand or break under low or high temperatures and does not melt at 1000 ° C. Therefore, it is a technical problem of the present invention to recycle the solidified waste treated with this new technology into excellent construction materials and civil engineering materials.

In order to achieve the above object, the present invention is an inorganic additive, magnesium oxide (MgO), magnesium chloride (MgCl ₂ ), calcium oxide, gypsum (CaSO ₄ , 1/2 H2O), lime, white cement and powder or liquid After the waste of the agitator is stirred in a stirrer and a mold (molding) to recycle the waste using the inorganic additives to produce the desired building materials and civil engineering materials to a building materials and civil engineering materials.

According to the present invention, various decaying or toxic harmful substances (components) in the waste are decomposed during the exothermic reaction of generating heat of about 50 ° C. to 100 ° C. by the reaction of the additives in the process of manufacturing the waste as a building material. As it is neutralized, a new lava-shaped solid block is formed.

The mixture in the mold is different depending on the ambient temperature, but after it is naturally silicified and changed, it is solidified into a mold-shaped product after about 6 hours at the ambient temperature of about 15 ℃.

If the ambient temperature is more than 15 ℃ to 25 ℃, it will be solidified after about 3 hours to complete the product.

It is characterized by manufacturing and recycling various types of construction materials and civil engineering materials after solidifying various wastes using inorganic additives.

The inorganic additive used in the present invention is to prepare an inorganic additive by mixing aluminum hydroxide, polyaluminum chloride, boric acid, ligninsulfonic acid, conventional silica surfactant and water.

In the present invention, magnesium oxide (MgO) and magnesium chloride (MgCl ₂ ) are used as raw materials, and calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime and back cement are mixed with the inorganic additive prepared above. After these raw materials and powdered waste are completely mixed, the exothermic reaction hardens rapidly and the waterproofing phenomenon occurs. After the mixture is completely solidified, it shows excellent compressive strength and waterproof effect. Is completed. In addition, the inorganic additive, which is a technique of the present invention, forms a new material having excellent performance through heat generated from its own reaction when combined with other raw materials. This phenomenon is based on the physicochemical therapy of all kinds of magnesium cements.

Stones and other parent materials used in the present invention are all non-radioactive and non-toxic components and heat is generated while the waste solidifies, but no gas is generated, and bacteria or viruses in the waste are extinguished or removed at high temperatures during the exothermic reaction. It suggests a manufacturing method for solidifying wastes that are dehydrated, dried and purified, and forming hazardous materials that do not contain harmful or toxic gases.

The waste to be treated in the present invention can be classified into designated, general and construction waste. More specifically, ① general waste dust, slag, process and wastewater sludge ② designated waste as waste oil, steelmaking dust, waste antifreeze, waste paint, waste acid, waste alkali, fly ash ③ various industries such as waste concrete, waste brick, etc. Wastes are included. Therefore, the wastes can be solidified by using additives and recycled into various construction and civil engineering materials, thereby greatly contributing to solving environmental problems and saving resources.

Particularly, when a large amount of waste concrete and waste bricks generated during the intermediate treatment of construction waste are recycled by combining the inorganic additives of the present technology with the raw materials of magnesium oxide (MgO) and magnesium chloride (MgCl ₂ ), excellent construction materials In particular, board blocks, cement bricks, fume pipes, etc. can be manufactured, and the quality test results prove that the quality of the finished product is tested by a test institute (Construction Materials Testing Institute, Chemical Testing Institute). . Therefore, the present invention proposes a new technology that can solidify any waste.

Hereinafter, the present invention will be described in detail through examples.

Example 1

In the first step, the inorganic additive is mixed with 5 parts by weight of aluminum hydroxide, 5 parts by weight of polyaluminum chloride, 0.5 parts by weight of boric acid, 5 parts by weight of ligninsulfonic acid and 0.5 parts by weight of silica-based surfactant to prepare an inorganic additive. and,

In the second process, 80 parts by weight of powdered dust, slag, sludge, and incinerator, which are general wastes, 10 parts by weight of MgO (magnesium oxide) and 1 part by weight of calcium oxide gypsum (CaSO ₄ , 1/2 H) ₂ O) 1 part by weight, 1 part by weight of lime and 1 part by weight of cement are added to the stirrer, followed by stirring to waste and magnesium oxide (MgO), calcium oxide, gypsum (CaSO ₄ , 1/2 H2O), lime and back cement Stir at 50 to 100 RPM for about 5 minutes until evenly mixed. Dissolve 5 parts by weight of solid MgCl ₂ (magnesium chloride) in water at 25 ° C to 30 ° C, and then mix the waste and the mixture to mix the dough. Then, finally, 1 part by weight of a liquid inorganic additive in a liquid state is added to a stirring vessel and stirred at 50-100 RPM for about 5 minutes to construct various desired molds (MOLD), and wastes using inorganic additives for manufacturing civil engineering materials. It is a recycling method for building materials and civil engineering materials.

Example 2

In order to solidify the general waste, 85 parts by weight of waste material containing ① dust, ② slag and ③ sludge (waste water) ④ incineration general material, etc., 7 parts by weight of magnesium oxide (MgO), calcium oxide and gypsum (CaSO ₄ 1/2 H2O), 2 parts by weight of lime, white cement, etc., each of 0.5 parts by weight, and 5 parts by weight of liquid magnesium chloride (MgCl ₂ ) in a mixer (MIXER) and mix and knead Example 1 Mixing 1 part by weight of the inorganic additive prepared in the first step to achieve perfect mixing, and then the dough (mixture) is poured into the desired MOLD (molding) and solidified. At this time, in order to evenly mix the waste and materials magnesium oxide (MgO), magnesium chloride (MgCl ₂ ) and calcium oxide, gypsum (CaSO ₄ , 1/2 H2O), lime, white cement, 50-100 for about 5 minutes After stirring at RPM, it is put in a desired mold and solidified. The solidification time is to manufacture the desired building materials and civil engineering materials after about 6 hours at about 15 ℃ or less and about 3 hours at about 30 ℃ depending on the ambient temperature.

Example 3

In order to manufacture the designated waste, 10% of liquid and powder ① fly ash, ② waste oil, ③ waste acid, ④ waste alkali, ⑤ waste paint, ⑥ waste antifreeze, ⑦ sludge (wastewater treatment plant) and ⑧ steelmaking dust 80 parts by weight of the mixed waste, 10 parts by weight of magnesium oxide (MgO) and 5 parts by weight of magnesium chloride (MgCl ₂ ), which are the materials to be applied to the invention, are mixed in a mixer (MIXER), and 1 part by weight of calcium oxide is added thereto. , 1 part by weight of gypsum (CaSO ₄ , 1/2 H 2 O), 1 part by weight of lime, 1 part by weight of cement is added to the mixer (MIXER) and kneaded, and finally the first step of Example 1 1 part by weight of the inorganic additive prepared in the company was stirred at 50-100 RPM for about 5 minutes in a stirrer, and the dough was poured into a mold of the desired form (MOLD), and after exothermic reaction, it was hardened by a new lava type solid block (lump). Building and solidifying to manufacture construction materials and civil engineering It was.

After solidification, if waterproof phenomenon occurs and it does not dissolve, it is not dissolved under 1000 ℃ and its compressive strength is strong, so it can be recycled into various construction and civil engineering materials.

Example 4

85 parts by weight of waste materials containing liquid and solid wastes in order to solidify the designated (specified) wastes ① fly ash, ② steelmaking dust, ③ waste paint, and ④ sludge, and magnesium oxide (a material applied to the technology of the invention) 10 parts by weight of a mixture of MgO) and magnesium chloride (MgCl ₂ ) and 4 parts by weight of 1 part by weight of calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime and white cement, respectively, Example 1 part by weight of the inorganic additive prepared in the first step into the mixer (MIXER) and knead the dough (mixture) is poured into a mold (MOLD) of the desired form to form a block (bump) after the exothermic reaction Building materials were manufactured by solidification. After solidification, it can be recycled to various industrial constructions and civil engineering materials with the same quality and strength as in Example 2.

Example 5

7 parts by weight of a mixture of 90 parts by weight of the construction waste, magnesium oxide (MgO), and magnesium chloride (MgCl ₂ ), which are ground and then ground to solidify the waste concrete, waste cement and waste bricks, which are construction wastes. 2 parts by weight of 0.5 parts by weight of calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime, and white cement, respectively, and 1 part by weight of the inorganic additive prepared in Example 1 above. After mixing and mixing the dough (mixture) in the desired shape of the MOLD (mold) and the difference in temperature, but solidified within 3 to 6 hours to produce a building material.

Experimental Example 1.

1. Test organization: Korea Institute of Construction Materials Testing and Research

2. Date of inspection: December 09, 1998

3. Sample Name: Solid Waste Specimen

4. Test (inspection) method: KS L 5105-'97

5. Specimen size: width × length × height (100 × 100 × 100㎜)

6. Test (inspection) results:

Sample Name: Solid Waste Specimen

Item: Compressive Strength (Kg / ㎠)

486 (Kg / ㎠)

Experimental Example 2.

1. Test organization: Korea Institute of Construction Materials Testing and Research

2. Inspection date: 1998. 12. 09 ~ 1998. 12 15

3. Sample Name: Liquid Waste (Before Solidifying)

4. Test Method: Environmental Notification No. 1993-42 Water Pollution Waste Process Test Method

5. Sample Collection Agency: Banwol Central Plating Corporation

6. Test (Inspection) item: Dissolution test inspection

7. Results of Dissolution Test

Sample Name Liquid Waste (Before Solidifying) (Banwol Central Plating Corporation) Waste after solidification (prototype) Soil Pollution Concerns Standard of Hazardous Substances in Designated Waste Farmland Industrial land Pb 8.9 Not detected 100 400 3.0 Cadmium (Cd) 0.8 〃 1.5 12 0.3 Arsenic (As) 203.6 〃 6 20 1.5 Chrome (Cr) 4921 〃 4 12 1.5

As shown in the test request result, the test sample of Experimental Example 2 was detected in a large amount of various toxic harmful substances (lead, cadmium, arsenic, chromium) in the liquid waste, but no harmful substances were detected in the solidified specimen. 1, of test

As a result of the lightning, the compressive strength of solid waste is 486 (Kg / ㎠), which is almost twice that of cement brick, and thus has unlimited potential for recycling designated wastes. I think you can solve them.

As described above, various wastes solidified by the technology of the present invention are recycled as construction materials and civil engineering materials according to their uses, thereby maximizing environmental improvement and resource saving. Therefore, the waste solidification treatment technology using the inorganic additive, which is the technology of the present invention, has no problem in commercialization in the industrial field, and the technology of the present invention is expected to play a role and utilization as a breakthrough in our industry without clear waste treatment technology.

As described above, the present invention treats industrial waste without incineration or landfill, without secondary pollution, thereby improving the environment such as economical effects such as efficient use of waste and cost reduction by recycling waste resources, as well as creating a pleasant living environment. As a result, it can contribute to the development of environmental industry.

More specifically,

Firstly, solid waste treated with the inventive technique is free from secondary pollution.

As the waste is purified by the action of inorganic additives, all the decaying substances in the waste are removed and dehydrated, bacteria and various viruses are extinguished, and no toxic and odorous gases are generated. In addition, after the exothermic reaction, the water absorption rate within about 10% and acid alkali and salt water are produced as a stone-hard material with anti-corrosion performance. The solid wastes generated in this way are mixed with the stone matrix and converted into a hard material even when they are broken, and because they are neutralized, they remain in solid form like ordinary tiles, so they do not dissolve and thus do not cause environmental problems due to secondary pollution. It works.

Secondly, the technique of the present invention is capable of treating any kind of waste. Existing waste treatment methods require a lot of labor to sort waste, but the technique of the present invention can handle all wastes together, so that the sorting process can be omitted. In particular, when treating various toxic liquid wastes which are difficult to incinerate, landfill or dispose of in hospitals or chemical plants with the technique of the present invention, harmful components in the liquid wastes may be neutralized and removed through exothermic reaction (50 ° C. to 100 ° C.). Can be.

Third, there is the flexibility of waste disposal. Existing waste disposal methods require the collection of wastes for disposal, which requires large transportation costs and a lot of land. The technology can treat waste in the same way as before, or it can be treated in parts. In other words, the solidification treatment technology of the present invention has the advantage that it can be installed on-site by moving equipment, that is, stirrer, grinder and molds according to the amount of waste to be treated. Since the waste treated by the present invention has a property of solidifying quickly, especially when the air temperature is maintained at 25 ° C. or higher, the solidification takes about 3 hours. Can be used as a finished product. Moreover, wastes accumulated in hills or hills are excellent effects that can be transformed into clean areas by instant solidification and refilling in place by the present invention.

Fourth, there are cost savings. The materials used in the technology of the present invention are inexpensive, simple in the technical process, less site and transportation costs can be reduced significantly compared to the conventional treatment method. In addition, the technology of the present invention can be used as a variety of construction materials with high performance, and the production cost can be significantly lower than the existing products, the cost reduction effect is even greater.

Fifthly, it can be used for road pavement or coastal landfill. In the new technology of the present invention, designated, general, construction wastes can be used for road construction after solidification treatment. This is because the compressive strength of solidified waste is of sufficient quality for road construction. In addition, the solidified waste can be poured into the shore and transformed into a massive stone mass, and can be 1 to 3 tons in size, and there is no secondary pollution, so there is an effect of utilizing landfill civil engineering materials. It can also be used for reclamation of deep lowlands, valleys and wetlands.

Sixth, it can be applied according to the size or mold according to various requests of construction and civil works, and it is effective to use as various construction materials. As a construction material, it can be used for large-scale paving stones, road boundary stones, sidewalk blocks, road central dividers, road constructions, earth pipes (fire pipes), fire protection, waterproofing, heat radiation materials, and radiation protection materials.

Claims (5)

In the method of recycling waste materials using inorganic additives as building materials, the inorganic additive is 5 parts by weight of aluminum hydroxide, 5 parts by weight of polyaluminum chloride, 0.5 parts by weight of boric acid, 5 parts by weight of ligninsulfonic acid and 0.5 parts by weight of silica-based surfactant. An additive is prepared by mixing with 84 parts by weight of water, 80 to 85 parts by weight of powdered dust, slag, sludge, and incineration ash, which are general wastes, 7 to 10 parts by weight of magnesium oxide (MgO), 0.5 to 1 part by weight of calcium oxide, and gypsum (CaSO ₄ , 1) / 2 H ₂ O) 0.5 to 1 parts by weight, lime and 0.5 to 1 parts by weight, 2 to 4 parts by weight of the cement cement 0.5-1 parts by weight in a stirrer to stir the waste and magnesium oxide (MgO), oxidation In order to mix calcium, gypsum (CaSO4, 1/2 H2O), lime and white cement, mix at 50 ~ 100 RPM for about 5 minutes in MIXER and add 5 parts by weight of solid MgCl ₂ Magnesium chloride is dissolved in water at 25 ° C to 30 ° C, mixed with waste and the mixture, and kneaded in a stirrer. Finally, 5 parts by weight of aluminum hydroxide, 5 parts by weight of polyaluminum chloride, and 0.5 parts by weight of boric acid are added. , A liquid state prepared by mixing 5 parts by weight of lignin sulfonic acid and 0.5 parts by weight of silica-based surfactant with 84 parts by weight of water Mineral additives 1 weight parts of stirred tank into how to recycle waste by using an inorganic additive for producing a construction, soil timber for various desired tooling (MOLD) and stirred with 50-100 RPM for about 5 minutes to building materials and soil timber. According to claim 1, wherein the waste is a designated (specific) waste of liquid and powder ① fly ash, ② waste oil, ③ waste acid, ④ waste alkali, ⑤ waste paint, ⑥ waste antifreeze, ⑦ sludge (waste water treatment plant) and ⑧ steelmaking 12 to 15 parts by weight of a mixture of 80 to 85 parts by weight of waste containing dust and the like and 7 to 10 parts by weight of magnesium oxide (MgO) and 5 parts by weight of magnesium chloride (MgCl ₂ ), which are applied to the technology of the invention, are mixed. 2 to 4 parts by weight of calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime, and white cement, respectively, were mixed and mixed with 2 to 4 parts by weight, and 5 parts by weight of aluminum hydroxide and 5 parts of polyaluminum chloride. 1 part by weight of an inorganic additive prepared by mixing a part by weight, 0.5 part by weight of boric acid, 5 parts by weight of lignin sulfonic acid and 0.5 part by weight of a silica-based surfactant with 84 parts by weight of water in a stirrer for about 5 minutes to 50-100 After mixing by mixing at RPM, the dough (mixture) is the desired mold (MO When it is poured into LD), it is solidified and solidified into a new lava-type hard block (lump) after exothermic reaction. According to claim 1, wherein the waste is a waste concrete and waste cement, 90 minutes by weight of the construction waste in the form of powder after the pulverization to solidify the waste brick and magnesium oxide (MgO) used as the technical material of the present invention , ₂ parts by weight of 7 parts by weight of magnesium chloride (MgCl ₂ ), 0.5 parts by weight of calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime and white cement were mixed, and aluminum hydroxide 5 parts by weight, 5 parts by weight of polyaluminum chloride, 0.5 parts by weight of boric acid, 5 parts by weight of lignin sulfonic acid, and 0.5 parts by weight of silica-based surfactant were mixed with 84 parts by weight of water, and 1 part by weight of the inorganic additive was prepared in a mixer. After mixing, the dough (mixture) is poured into the mold of the desired form (molding), depending on the temperature, but depending on the temperature solidified within 3 to 6 hours to produce the building materials, waste using inorganic additives How to recycle the water to building materials. The waste according to claim 1, 2 to 3, wherein the waste is 80 to 85 parts by weight, 7 to 10 parts by weight of magnesium oxide (MgO) and chloride, regardless of the type of powder and liquid, and general waste. _2-4 parts by weight of a mixture of 5 parts by weight of magnesium (MgCl ₂ ) and 0.5-1 parts by weight of calcium oxide, gypsum (CaSO ₄ , 1/2 H 2 O), lime and cement, respectively, 5 parts by weight of aluminum hydroxide, 5 parts by weight of polyaluminum chloride, 0.5 parts by weight of boric acid, 5 parts by weight of lignin sulfonic acid, and 0.5 parts by weight of silica-based surfactant were mixed with 84 parts by weight of water. ) And then recycle the waste using inorganic additives to building materials and civil engineering, characterized in that for manufacturing various construction and civil engineering. The inorganic additive composition used to recycle the waste into building materials and civil engineering materials includes the poly-inorganic additives: 5 parts by weight of aluminum hydroxide, 5 parts by weight of polyaluminum chloride, 0.5 parts by weight of boric acid, 5 parts by weight of ligninsulfonic acid, and 0.5 surfactants of silica. Inorganic additive composition, characterized in that the composition by weight and 84 parts by weight of water.