WO2011071218A1 - 석면폐기물을 이용한 경량 건축자재의 제조 방법 - Google Patents
석면폐기물을 이용한 경량 건축자재의 제조 방법 Download PDFInfo
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- WO2011071218A1 WO2011071218A1 PCT/KR2010/003541 KR2010003541W WO2011071218A1 WO 2011071218 A1 WO2011071218 A1 WO 2011071218A1 KR 2010003541 W KR2010003541 W KR 2010003541W WO 2011071218 A1 WO2011071218 A1 WO 2011071218A1
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- asbestos
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- asbestos waste
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- 239000010425 asbestos Substances 0.000 title claims abstract description 71
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 71
- 239000002699 waste material Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 25
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- 239000004927 clay Substances 0.000 claims abstract description 17
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010457 zeolite Substances 0.000 claims abstract description 17
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- 238000000034 method Methods 0.000 claims description 25
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- MFGOFGRYDNHJTA-UHFFFAOYSA-N 2-amino-1-(2-fluorophenyl)ethanol Chemical compound NCC(O)C1=CC=CC=C1F MFGOFGRYDNHJTA-UHFFFAOYSA-N 0.000 description 1
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
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- 206010003441 asbestosis Diseases 0.000 description 1
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Inorganic materials [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1325—Hazardous waste other than combustion residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/82—Asbestos; Glass; Fused silica
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Definitions
- the present invention relates to a method for manufacturing lightweight building materials using asbestos waste, and more particularly, to a method for manufacturing lightweight building materials using asbestos waste, which can manufacture building materials by removing and reducing the weight of asbestos components of asbestos waste. It relates to a lightweight building material produced thereby.
- asbestos is rich in sound absorption, heat insulation, corrosion resistance, chemical resistance, and low price, so construction materials such as mill board, asbestos slate, fireproof material, fireproof material, thermal insulation material, heat insulation material, electric insulation material, electrolyte membrane material and brake Applications such as lining materials have been widely used. Since the 1970s, however, reports of asbestos adversely affected humans.
- Asbestos is composed of needle-like tissues with diameters ranging from 0.02 to 0.2 ⁇ m, so when powder is ingested through breathing, it remains in the respiratory organs for a long time, and after 20 to 40 years of incubation period, lung cancer, lung disease, pleura or pleura It was identified as a substance that can cause malignant mesothelioma, and it was designated as a first-class carcinogen by the International Cancer Research Institute (IARC) under the World Health Organization (WHO). As it is designated as a substance, the problem is serious.
- IARC International Cancer Research Institute
- WHO World Health Organization
- Korean Unexamined Patent Publication No. 2002-0032672 asbestos waste is put into an opening container, the lid is covered and stored and recovered, and the asbestos waste treatment is charged with steelmaking raw materials such as scrap into the steelmaking furnace to dissolve and process the opening container.
- the method is presented. This method has the advantage of easy handling of the opening container and suppression of processing time and cost, but it does not provide a method for recycling waste.
- Korean Patent No. 10-0891372 discloses dissolving the waste asbestos in one or more strong acid solutions selected from the group consisting of sulfuric acid, hydrochloric acid, hydrofluoric acid, and nitric acid, preparing the waste asbestos solution in a sol state, and then preparing sodium hydroxide, potassium hydroxide, and lithium hydroxide.
- Japanese Laid-Open Patent Publication 2002-173358 proposed a method for producing porous ceramics with permeability using asbestos waste and sewage sludge to reduce the cost of waste treatment, but its application range was limited to sidewalk blocks due to its excellent flexural strength.
- the present inventors have made diligent efforts to solve the above problems.
- a lightweight building material is manufactured by adding silicon carbide, loess, zeolite, and alumina clay to asbestos waste, the asbestos component is not detected and the lightweight building material has excellent physical properties. It was confirmed that it can be prepared, the present invention was completed.
- the present invention provides a method for producing a lightweight building material using asbestos waste, which can remove various asbestos components of asbestos waste and make it lighter.
- the present invention (a) 100 parts by weight of asbestos waste, 40 to 100 parts by weight of ocher, 3 to 6 parts by weight of silicon carbide, 30 to 70 parts by weight of zeolite and 30 to 70 parts by weight of alumina clay To prepare a mixture; (b) molding the mixture; And (c) provides a method for producing a lightweight building material using asbestos waste comprising the step of firing the molded mixture to produce a building material.
- the present invention also provides a lightweight building material, characterized in that 100 parts by weight of asbestos waste, 40 to 100 parts by weight of ocher, 3 to 6 parts by weight of silicon carbide, 30 to 70 parts by weight of zeolite and 30 to 70 parts by weight of alumina clay. do.
- Figure 1 shows a process for producing an asbestos waste recycling product according to the invention.
- Figure 2 is ground for use in the production of asbestos waste according to the invention.
- Figure 3 shows a photograph of the building material product manufactured using asbestos waste, A is a light-weight product with bubbles formed, B is a permeable product.
- Figure 4 shows the qualitative analysis results of the asbestos recycling product according to the present invention.
- the present invention provides a mixture by (a) mixing 100 parts by weight of asbestos waste, 40-100 parts by weight of ocher, 3-6 parts by weight of silicon carbide, 30-70 parts by weight of zeolite and 30-70 parts by weight of alumina clay. Doing; (b) molding the mixture; And (c) calcining the molded mixture to produce a building material.
- the lightweight building material refers to materials required for the construction of buildings or roads, such as lightweight bricks, lightweight panels, lightweight permeable bricks, sidewalk blocks, soundproofing materials, heat insulating materials, fireproof materials and the like.
- asbestos waste is a waste product obtained by disassembling after asbestos having excellent durability, heat resistance, chemical resistance, electrical insulation, and the like and being used as a building material, fireproof material, electric insulation material, and fireproof coating material.
- the fine asbestos fibers in the air are extremely harmful to the human body, causing asbestosis and the like, and the treatment process is strictly limited. Accordingly, in the present invention, by treating the asbestos waste to produce a building material, to prevent environmental pollution due to asbestos, and to recycle the waste asbestos by manufacturing environmentally friendly lightweight building materials with excellent strength and porosity without being detected asbestos components The cost of processing can be reduced.
- loess refers to a sediment mainly composed of particles having a diameter of 0.002 mm to 0.005 mm in silt size, yellowish brown color, not weathered well, making a angular vertical wall, and mainly containing quartz, and fluorite, hornblende Etc., and it is lime.
- it is possible to improve the strength by adding ocher, improve the strength, obtain far-infrared emission effect and deodorization effect, reduce the wear by equipment and reduce the firing temperature, and save energy. It showed an effect.
- silicon carbide is a carbide of silicon, which is called carborundum in the trade name, and is of formula SiC.
- silicon carbide expands the inside of the pores formed during foaming and is not affected by thermal changes, thereby maintaining the foamed pores without shrinking or deforming the cooling pores.
- silicon carbide powder is mixed with asbestos waste and rises above 900 ° C, asbestos components begin to melt at 900 ° C, and silicon carbide melts at 1150 ° C, and the physical properties change in the process of ejecting gas. In this process, bubbles are generated to increase the weight reduction effect of the product.
- zeolite are words that are generically aluminum silicate hydrate the mineral of the alkaline and alkaline earth metals, (Si, Al) O 4 in which tetrahedrons, the large gaps present in the structure bonded to the three-dimensional mesh center Is characteristic. Many kinds but high water content, crystal properties, acid phase ( ) And the like. Hardness does not exceed 6, specific gravity is about 2.2. Generally it is colorless transparent or white translucent. As it is a porous material, the absorption of the building material is improved, and when mixed with silicon carbide, there is an effect of generating a plurality of pores compared to other minerals.
- alumina clay refers to clay (fine soil particles having a diameter of 0.004 mm or less), which is characterized by volcanic ash soil, and volcanic ash soil is a volcanic ash, pumice, or volcanic eruption under a wet or wet climate.
- Alumina clay can act as a nucleus during foaming during construction materials manufacturing process, less wear of equipment, and improve the strength of the product.
- a method for producing a lightweight building material using asbestos wastes is based on 100 parts by weight of asbestos waste, 40 to 100 parts by weight of ocher, 3 to 6 parts by weight of silicon carbide, 30 to 70 parts by weight of zeolite and alumina clay. Contains 30 to 70 parts by weight.
- the strength of the product when added less than 40 parts by weight, the strength of the product may be weakened, when added in excess of 100 parts by weight, a cost problem occurs.
- asbestos components when silicon carbide is added in less than 3 parts by weight, asbestos components may not be completely removed or light weight may be poor, and when added in excess of 6 parts by weight, excessive bubbles are generated and the strength is weak. Can be done.
- the weight when the zeolite is added less than 30 parts by weight, the weight may not be good, and when added in excess of 70 parts by weight may cause a cost problem and weaken the strength.
- the strength when added in less than 30 parts by weight, the strength may be weakened or the foaming process may not occur well, and when added in excess of 70 parts by weight, a cost problem occurs.
- the crushing process is usually made in stages by a mill, a crusher and the like and the particle size is crushed to less than 2mm.
- the molding can be carried out in a conventional manner, preferably through a dry molding process using a press.
- the firing process may be carried out by a conventional firing method such as a kiln or tunnel kiln, and is performed for 1 hour at 1170 to 1200 ° C. If the firing temperature is less than 1170 ° C, bubbles are not formed and thus a lightweight product is produced. It cannot be manufactured, and when exceeded above 1190 ° C., a magnetic product is produced. In addition, when the firing time is less than 4 hours, the magnetization is not performed and the gas is not sufficiently ejected, and asbestos components cannot be sufficiently removed.
- a conventional firing method such as a kiln or tunnel kiln
- the present invention using asbestos waste containing 100 parts by weight, asbestos waste 40 to 100 parts by weight, 3 to 6 parts by weight of silicon carbide, 30 to 70 parts by weight of zeolite and 30 to 70 parts by weight of alumina clay It is about light weight building materials.
- the method for manufacturing lightweight building materials using asbestos waste according to the present invention and the lightweight building materials produced by the same are various plastic materials that are harmless to the human body since the asbestos components are not detected by changing the physical properties of asbestos components by firing with addition of silicon carbide. It can be used for the manufacture of products, and it is possible to reduce the weight of the product, and the addition of ocher improves the strength, heat insulation and eco-friendliness of building materials, and by adding zeolite and alumina clay, light weight with excellent formability, absorption power and water retention power It is effective to manufacture building materials.
- silicon carbide it was used to import that the particles of at least 80 mesh size to the purity of 80% or more, the zeolite was used as the purity of 80% or more, anti-soil clays IO 2 48% Al 2 O 3 32% Fe 2 O 3 A product consisting of 1.3% K 2 O 9.94% Na 2 O 0.1% and other ingredients was purchased and used. In addition, the compounding ratio of silicon carbide 3% was calculated as a value for the total 100 parts by weight of the other components except silicon carbide.
- the firing is performed for 4 hours to 4 hours and 30 minutes, the firing temperature is 1170 ⁇ 1200 °C but when firing at 1170 °C can make a permeable product, when the firing temperature is above 1200 °C magnetic products are Produced.
- 3 shows a photograph of a lightweight building material manufactured using asbestos waste.
- asbestos waste is added to silicon carbide, loess, zeolite and alumina clay so that asbestos components are not detected and the weight of building materials can be reduced. It has the effect of manufacturing eco-friendly lightweight building materials with excellent moldability, water absorption and moisture retention.
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Abstract
Description
Claims (4)
- 다음 단계를 포함하는, 경량 건축자재를 제조하는 방법:(a) 석면폐기물 100중량부, 황토 40~100중량부, 탄화규소 3~6중량부, 제올라이트 30~70중량부 및 반토질점토 30~70중량부를 혼합하여 혼합물을 제조 하는 단계;(b) 상기 혼합물을 성형하는 단계; 및(c) 상기 성형된 혼합물을 소성하여 건축자재로 제조하는 단계.
- 제 1항에 있어서, 상기 (c)단계의 소성은 1170~1200℃의 온도에서 4시간~4시간 30분 동안 수행하는 것을 특징으로 하는 방법.
- 제 1항 또는 제 2항의 방법으로 제조된, 황토, 탄화규소, 제올라이트 및 반토질점토를 함유하는 경량 건축자재.
- 제 3항에 있어서, 석면 폐기물 100중량부, 황토 40~100중량부, 탄화규소 3~6중량부, 제올라이트 30~70중량부 및 반토질점토 30~70중량부를 함유하는 것을 특징으로 하는 경량 건축자재.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2012543004A JP2013513540A (ja) | 2009-12-11 | 2010-06-01 | 石綿廃棄物を用いた軽量建設資材の製造方法 |
CN201080061098.1A CN102712537B (zh) | 2009-12-11 | 2010-06-01 | 利用石棉废弃物的轻量建筑材料的制造方法 |
US13/515,273 US8470087B2 (en) | 2009-12-11 | 2010-06-01 | Production method for a lightweight construction material using asbestos waste |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020090123482A KR101215067B1 (ko) | 2009-12-11 | 2009-12-11 | 석면폐기물을 이용한 경량 건축자재의 제조 방법 |
KR10-2009-0123482 | 2009-12-11 |
Publications (1)
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WO2011071218A1 true WO2011071218A1 (ko) | 2011-06-16 |
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PCT/KR2010/003541 WO2011071218A1 (ko) | 2009-12-11 | 2010-06-01 | 석면폐기물을 이용한 경량 건축자재의 제조 방법 |
Country Status (5)
Country | Link |
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US (1) | US8470087B2 (ko) |
JP (1) | JP2013513540A (ko) |
KR (1) | KR101215067B1 (ko) |
CN (1) | CN102712537B (ko) |
WO (1) | WO2011071218A1 (ko) |
Families Citing this family (4)
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KR101380856B1 (ko) * | 2011-07-07 | 2014-04-04 | 이세린 | 폐기물을 이용한 경량 건축자재의 제조 방법 및 이로부터 제조된 경량 건축자재 |
RU2549641C1 (ru) * | 2014-02-11 | 2015-04-27 | Федеральное государственное бюджетное образовательное учреждение науки Тувинский институт комплексного освоения природных ресурсов Сибирского отделения Российской академии наук (ТувИКОПР СО РАН) | Керамическая масса для изготовления клинкерного кирпича |
RU2548456C1 (ru) * | 2014-04-08 | 2015-04-20 | Юлия Алексеевна Щепочкина | Сырьевая смесь для изготовления черепицы |
KR102333716B1 (ko) * | 2019-05-08 | 2021-12-02 | 주식회사 하라테크 | 석면 블럭 및 그 제조 방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994023801A1 (en) * | 1993-04-20 | 1994-10-27 | Rockwool International A/S | Method of converting asbestos cement into a harmless product |
KR19980075814A (ko) * | 1997-03-28 | 1998-11-16 | 김주환 | 탄화규소를 이용한 발포세라믹재 |
KR20040096832A (ko) * | 2004-09-20 | 2004-11-17 | 안기주 | 재활용 점토 벽돌 |
WO2007034816A1 (ja) * | 2005-09-20 | 2007-03-29 | Inter-University Research Institute National Institutes Of Natural Sciences | アスベストの変性方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1992012104A1 (en) * | 1991-01-07 | 1992-07-23 | Takeda Chemical Industries, Ltd. | Process for molding and firing zeolite powder |
KR100464103B1 (ko) | 2000-10-26 | 2004-12-31 | 닛포코산 주식회사 | 석면 폐기물 처리방법 |
JP4694065B2 (ja) | 2001-09-26 | 2011-06-01 | 株式会社エーアンドエーマテリアル | 石綿の処理方法 |
CN1319903C (zh) * | 2003-04-02 | 2007-06-06 | 谢正富 | 一种矿渣砖的制造方法 |
KR100891372B1 (ko) | 2007-10-25 | 2009-04-02 | 주식회사 대겸 | 폐석면을 이용한 친환경 단열재의 제조방법 |
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2009
- 2009-12-11 KR KR1020090123482A patent/KR101215067B1/ko active IP Right Grant
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2010
- 2010-06-01 JP JP2012543004A patent/JP2013513540A/ja active Pending
- 2010-06-01 US US13/515,273 patent/US8470087B2/en not_active Expired - Fee Related
- 2010-06-01 CN CN201080061098.1A patent/CN102712537B/zh not_active Expired - Fee Related
- 2010-06-01 WO PCT/KR2010/003541 patent/WO2011071218A1/ko active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994023801A1 (en) * | 1993-04-20 | 1994-10-27 | Rockwool International A/S | Method of converting asbestos cement into a harmless product |
KR19980075814A (ko) * | 1997-03-28 | 1998-11-16 | 김주환 | 탄화규소를 이용한 발포세라믹재 |
KR20040096832A (ko) * | 2004-09-20 | 2004-11-17 | 안기주 | 재활용 점토 벽돌 |
WO2007034816A1 (ja) * | 2005-09-20 | 2007-03-29 | Inter-University Research Institute National Institutes Of Natural Sciences | アスベストの変性方法 |
Also Published As
Publication number | Publication date |
---|---|
US8470087B2 (en) | 2013-06-25 |
CN102712537A (zh) | 2012-10-03 |
US20130061778A1 (en) | 2013-03-14 |
KR101215067B1 (ko) | 2012-12-24 |
CN102712537B (zh) | 2014-04-02 |
KR20110066719A (ko) | 2011-06-17 |
JP2013513540A (ja) | 2013-04-22 |
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