WO2021085792A1 - Procédé de détoxification de déchets contenant de l'amiante - Google Patents
Procédé de détoxification de déchets contenant de l'amiante Download PDFInfo
- Publication number
- WO2021085792A1 WO2021085792A1 PCT/KR2020/008273 KR2020008273W WO2021085792A1 WO 2021085792 A1 WO2021085792 A1 WO 2021085792A1 KR 2020008273 W KR2020008273 W KR 2020008273W WO 2021085792 A1 WO2021085792 A1 WO 2021085792A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- asbestos
- waste
- acid
- treatment step
- detoxifying
- Prior art date
Links
- 239000010425 asbestos Substances 0.000 title claims abstract description 120
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 120
- 239000002699 waste material Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 23
- 238000010306 acid treatment Methods 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 8
- 230000003197 catalytic effect Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 4
- 235000012254 magnesium hydroxide Nutrition 0.000 claims abstract description 4
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 4
- 239000011780 sodium chloride Substances 0.000 claims abstract description 4
- 238000010298 pulverizing process Methods 0.000 claims description 19
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims 2
- 238000001907 polarising light microscopy Methods 0.000 description 12
- 238000001784 detoxification Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 238000002441 X-ray diffraction Methods 0.000 description 9
- 229910052620 chrysotile Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000004566 building material Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- CWBIFDGMOSWLRQ-UHFFFAOYSA-N trimagnesium;hydroxy(trioxido)silane;hydrate Chemical compound O.[Mg+2].[Mg+2].[Mg+2].O[Si]([O-])([O-])[O-].O[Si]([O-])([O-])[O-] CWBIFDGMOSWLRQ-UHFFFAOYSA-N 0.000 description 2
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 239000007970 homogeneous dispersion Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 208000006178 malignant mesothelioma Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/36—Detoxification by using acid or alkaline reagents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0066—Disposal of asbestos
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/41—Inorganic fibres, e.g. asbestos
Definitions
- the present invention relates to a method for detoxifying waste materials containing asbestos, and more particularly, to a method for more effectively detoxifying waste asbestos separated from waste materials containing asbestos through acid treatment or heat treatment followed by carbonation.
- fibrous silicate minerals that exist in nature, it refers to hydrous silicate containing a lot of magnesium, and is also called asbestos and dolsom. It refers to a fibrous inorganic material with a crystal chemical structure, and is a natural fiber in which serpentine or amphibole is changed into a fibrous form. Asbestos is widely used as interior and exterior materials for buildings and industrial raw materials due to its excellent thermal insulation, heat resistance, and insulation, resistance to friction, and strong resistance to chemicals.
- Asbestos building materials have different asbestos content depending on the usage and production method. For example, ceiling tex maintained a content of 10-13% before 1995 so that asbestos emerged as a social issue, but since then, it has been maintained at a level of about 5-10% until the period of prohibition of use of asbestos due to social demands.
- various ranges of asbestos were used, ranging from 5 to 18% for each type of product.Bamlite, which requires bending strength, was about 18%, and in the case of bone asbestos slate, about 10%, and the bending strength was high. About 5% of white asbestos was used for the unrequired 6mm ceiling material, and about 10% of white asbestos was used for productivity and flexural stiffness reinforcement in the case of extrusion-molded products.
- asbestos is a class 1 carcinogen, and long-term exposure to asbestos can cause respiratory diseases such as lung cancer, malignant mesothelioma, and asbestos lung.
- respiratory diseases such as lung cancer, malignant mesothelioma, and asbestos lung.
- it is generally known to be harmful to the human body in the order of blue asbestos> galseokmyeon> white asbestos.
- the manufacture, import, and use of products containing 0.1% or more of asbestos were prohibited under the Occupational Safety and Health Act. The handling and movement of all substances containing more than% became illegal. As such, since asbestos causes health and health problems, there are efforts to remove asbestos building materials.
- asbestos waste has been generally pretreated to landfill, but problems such as difficulty in pretreatment work, high cost, and exposure as environmental pollutants even after landfill have been pointed out.
- asbestos detoxification treatment methods have been studied, and asbestos detoxification treatment methods developed so far include a method of removing the fibrous structure by treating the surface of a product containing asbestos with a strong acid, and a method of melting by heating at high temperature. have.
- this method has a problem that the strong acid used for pretreatment is greater than the harmfulness of asbestos itself, or it takes a considerable amount of energy due to high temperature heating, so that the treatment cost is greatly increased.
- the present invention has been developed to improve the conventional method of detoxifying waste asbestos, and provides a method for more effectively detoxifying waste asbestos without using strong acid or heat treatment at high temperature. There is.
- the present invention comprises: a crushing step of pulverizing waste materials containing asbestos and separating the waste asbestos; Acid treatment step of mixing waste asbestos with acid; Heat treatment step of heating the primary carbonation waste asbestos at a temperature of 350 to 500°C for 1 to 3 hours; A catalyst treatment step of cooling the heat treated waste asbestos and mixing it with a catalyst; A secondary carbonation step of supplying and reacting CO 2 to the catalyst-treated waste asbestos while maintaining a temperature of 100 to 150°C and a pressure of 5 to 8 bar; It provides a method for detoxifying waste materials containing asbestos, characterized in that at least one is made while using an aqueous alkali solution dissolved in water as a catalyst.
- the detoxified waste asbestos can be commercialized as a recycled material through the drying and packaging process, thereby reducing environmental pollution by reducing the waste of waste materials containing asbestos, as well as eco-friendliness due to resource recycling can be expected.
- FIG. 1 is a schematic diagram of a method for detoxifying waste materials containing asbestos according to the present invention.
- Figure 2 shows a photograph of the waste material containing asbestos by the pulverization step in the method for detoxifying the waste material containing asbestos according to the present invention.
- FIG. 7 is a diagram showing a relative comparison of XRD patterns for each sample in Test Example 2 of the present invention.
- FIG. 1 is a schematic diagram of a method for detoxifying waste materials containing asbestos according to the present invention, as shown in the present invention, detoxifying asbestos through'crushing of asbestos-containing waste materials ⁇ acid treatment and/or heat treatment ⁇ carbonation treatment' Processing takes place. Specifically, it looks at step by step a method for detoxifying waste materials containing asbestos according to the present invention.
- the crushing step is a step of pulverizing the waste materials containing asbestos and separating the waste asbestos. Through this step, asbestos fibers are completely spongy, and materials such as waste asbestos and cement are separated. Since dust may be generated during the pulverization process, the pulverization step is preferably performed while adding a stabilizer.
- the pulverization step may preferably use a shredder, a roller mill, a hammer mill, and the like, and more preferably, a first pulverization step of pulverizing to less than 50 mm using a shredder or a roll mill, and the waste fibers pulverized to less than 1 mm using a hammer mill. It can be carried out by dividing into a second pulverization step of collecting and separating. Fibers and cement particles can be completely separated by the second pulverization step by a hammer mill, and the first pulverization step is performed to improve the efficiency of the hammer mill.
- the hammer mill can be used for pulverization of ceiling-type asbestos building materials having a density of 12g/cm3 because it is possible to proceed with a closed-type continuous process, and in particular, it has excellent dispersibility due to simultaneous operations such as sponges of fibers.
- FIG. 2 shows a photograph of the waste material containing asbestos by the pulverization step. After the second pulverization by a hammer mill, the complete sponge state is confirmed, and the SEM photograph also shows the state in which the waste asbestos fiber and the cement material are completely separated.
- the acid treatment step is a step of mixing waste asbestos with acid.
- Acid treatment is a process of primarily detoxifying waste asbestos by dissolving it in acid.
- weak acids such as oxalic acid, bicarbonate, and acetic acid are sufficient as the acid, because it undergoes a secondary detoxification process through carbonation.
- the acid treatment step is preferably carried out while utilizing a weightless mixer for homogeneous dispersion of the acid.
- Heat treatment is a step of heating waste asbestos at a temperature of 350 ⁇ 500°C for 1 ⁇ 3 hours. Heat treatment is a process for activating the reaction of the asbestos.
- the catalytic treatment is a process for increasing the fixation reaction of carbon dioxide in the subsequent carbonation process.
- As a catalyst an alkaline aqueous solution in which at least one of MgO, Mg(OH)2, and NaCl is dissolved in water is used. By adjusting the pH of the waste asbestos solution to 7 or more, the fixation reaction of carbon dioxide can be increased.
- the detoxification treatment of waste asbestos becomes possible through a series of processes such as'crushing of waste materials containing asbestos ⁇ acid treatment and/or heat treatment ⁇ carbonation treatment'.
- the detoxified waste asbestos can be commercialized as a recycled material through drying and packaging steps. If there is moisture, it can be changed to a state that cannot be used due to problems such as rehydration, so it is dried to continue completely drying, and drying can be used with a Raymond Mill dryer.
- test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.
- FIGS. 3 and 4 are an XRD pattern and a PLM photograph of an acid-treated sample.
- the sample using hydrochloric acid (H-1) exhibited a different XRD pattern from the samples using bicarbonate or acetic acid (N-1, A-1), which is the strong acid hydrochloric acid compared to the weak acid sample itself. It is considered to be because it is easy to dissolve the components contained in.
- N-1, A-1 bicarbonate or acetic acid
- an asbestos peak between 10-15 degrees was found.
- a fibrous material judged as white asbestos was observed, and it was confirmed that it had an asbestos content of about 2-3% overall.
- FIGS. 5 to 7 are diagram showing a relative comparison of the XRD patterns of the raw material and the detoxified treated sample. As shown, it is confirmed that the peak of white asbestos is significantly reduced in the detoxified treated sample compared to the raw material.
- the present invention relates to a method of more effectively detoxifying waste asbestos separated from waste materials containing asbestos through acid treatment or heat treatment followed by carbonation. According to the present invention, it is possible to detoxify waste asbestos more effectively without using a strong acid or heat treatment at a high temperature. Waste asbestos treated with detoxification can be commercialized as recycled materials through drying and packaging processes.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
La présente invention concerne un procédé de détoxification de déchets contenant de l'amiante, et plus spécifiquement, un procédé pour détoxifier plus efficacement de l'amiante résiduaire, séparé de déchets contenant de l'amiante, par l'intermédiaire d'un procédé de carbonation après traitement acide ou traitement thermique de celui-ci. Le procédé de détoxification de déchets contenant de l'amiante comprend : une étape de broyage dans laquelle des déchets contenant de l'amiante sont broyés et les déchets d'amiante sont séparés ; une étape de traitement acide dans laquelle les déchets d'amiante sont mélangés avec de l'acide ; une étape de traitement thermique dans laquelle de l'amiante résiduaire carboné primaire est chauffé à une température de 350 à 500 °C pendant 1 à 3 heures ; une étape de traitement catalytique dans laquelle l'amiante résiduaire traité à la chaleur est refroidi et mélangé avec un catalyseur ; et une étape de carbonation secondaire dans laquelle du CO2 est fourni à des déchets contenant de l'amiante ayant subis le traitement catalytique, tout en maintenant une température de 100 à 150 °C et une pression de 5 à 8 bars, l'étape de traitement catalytique étant réalisée en utilisant, en tant que catalyseur, une solution aqueuse alcaline dans laquelle au moins un parmi l'oxyde de magnésium (MgO), l'hydroxyde de magnésium (Mg(OH)2), et le chlorure de sodium (NaCl) sont dissous dans de l'eau.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190136163A KR102159338B1 (ko) | 2019-10-30 | 2019-10-30 | 석면 함유 폐자재의 무해화 처리방법 |
| KR10-2019-0136163 | 2019-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021085792A1 true WO2021085792A1 (fr) | 2021-05-06 |
Family
ID=72708312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2020/008273 WO2021085792A1 (fr) | 2019-10-30 | 2020-06-25 | Procédé de détoxification de déchets contenant de l'amiante |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR102159338B1 (fr) |
| WO (1) | WO2021085792A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4124397A1 (fr) * | 2021-07-30 | 2023-02-01 | Valame | Procédé de traitement d'une matière solide contenant de l'amiante |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050002171A (ko) * | 2003-06-30 | 2005-01-07 | 주식회사 포스코 | 고형 매립물의 안정화 처리방법 |
| KR101005082B1 (ko) * | 2010-02-26 | 2010-12-30 | 한국기계연구원 | 석면 폐기물 처리 장치 |
| KR20130004115A (ko) * | 2011-06-30 | 2013-01-09 | 전남대학교산학협력단 | 석면 함유 물질의 무해화 및 이산화탄소 고정 방법 |
| KR20130114396A (ko) * | 2012-04-09 | 2013-10-17 | 한국건설기술연구원 | 저온에서의 산 처리에 의한 폐석면의 안정화 처리방법 |
| KR101536135B1 (ko) * | 2014-12-09 | 2015-07-13 | 주식회사 드림에코텍 | 화합물을 이용한 저온 열분해 폐석면 처리 장치 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101326741B1 (ko) | 2013-06-25 | 2013-11-08 | 한국지질자원연구원 | 폐슬레이트의 석면 무해화 처리 방법, 및 이렇게 하여 얻은 무해화된 석면 |
-
2019
- 2019-10-30 KR KR1020190136163A patent/KR102159338B1/ko active IP Right Grant
-
2020
- 2020-06-25 WO PCT/KR2020/008273 patent/WO2021085792A1/fr active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050002171A (ko) * | 2003-06-30 | 2005-01-07 | 주식회사 포스코 | 고형 매립물의 안정화 처리방법 |
| KR101005082B1 (ko) * | 2010-02-26 | 2010-12-30 | 한국기계연구원 | 석면 폐기물 처리 장치 |
| KR20130004115A (ko) * | 2011-06-30 | 2013-01-09 | 전남대학교산학협력단 | 석면 함유 물질의 무해화 및 이산화탄소 고정 방법 |
| KR20130114396A (ko) * | 2012-04-09 | 2013-10-17 | 한국건설기술연구원 | 저온에서의 산 처리에 의한 폐석면의 안정화 처리방법 |
| KR101536135B1 (ko) * | 2014-12-09 | 2015-07-13 | 주식회사 드림에코텍 | 화합물을 이용한 저온 열분해 폐석면 처리 장치 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4124397A1 (fr) * | 2021-07-30 | 2023-02-01 | Valame | Procédé de traitement d'une matière solide contenant de l'amiante |
| FR3125722A1 (fr) * | 2021-07-30 | 2023-02-03 | Valame | Procede de traitement d’une matiere solide contenant de l’amiante |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102159338B1 (ko) | 2020-09-23 |
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