WO2015083881A1 - 가연성 폐기물을 유리화하기 위한 유리조성물 및 이를 이용한 가연성 폐기물의 유리화 방법 - Google Patents
가연성 폐기물을 유리화하기 위한 유리조성물 및 이를 이용한 가연성 폐기물의 유리화 방법 Download PDFInfo
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- WO2015083881A1 WO2015083881A1 PCT/KR2013/012306 KR2013012306W WO2015083881A1 WO 2015083881 A1 WO2015083881 A1 WO 2015083881A1 KR 2013012306 W KR2013012306 W KR 2013012306W WO 2015083881 A1 WO2015083881 A1 WO 2015083881A1
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- Prior art keywords
- weight
- glass
- waste
- glass composition
- vitrifying
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- 239000011521 glass Substances 0.000 title claims abstract description 121
- 239000002699 waste material Substances 0.000 title claims abstract description 56
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004017 vitrification Methods 0.000 claims abstract description 26
- 239000010849 combustible waste Substances 0.000 claims description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 12
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 12
- 229910052796 boron Inorganic materials 0.000 claims description 8
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 229910018071 Li 2 O 2 Inorganic materials 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 239000002901 radioactive waste Substances 0.000 abstract description 9
- 229920001971 elastomer Polymers 0.000 abstract description 6
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- 239000007788 liquid Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000000156 glass melt Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 239000008187 granular material Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002927 high level radioactive waste Substances 0.000 description 2
- 239000002925 low-level radioactive waste Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
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- 230000008520 organization Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- HBGPNLPABVUVKZ-POTXQNELSA-N (1r,3as,4s,5ar,5br,7r,7ar,11ar,11br,13as,13br)-4,7-dihydroxy-3a,5a,5b,8,8,11a-hexamethyl-1-prop-1-en-2-yl-2,3,4,5,6,7,7a,10,11,11b,12,13,13a,13b-tetradecahydro-1h-cyclopenta[a]chrysen-9-one Chemical compound C([C@@]12C)CC(=O)C(C)(C)[C@@H]1[C@H](O)C[C@]([C@]1(C)C[C@@H]3O)(C)[C@@H]2CC[C@H]1[C@@H]1[C@]3(C)CC[C@H]1C(=C)C HBGPNLPABVUVKZ-POTXQNELSA-N 0.000 description 1
- PFRGGOIBYLYVKM-UHFFFAOYSA-N 15alpha-hydroxylup-20(29)-en-3-one Natural products CC(=C)C1CCC2(C)CC(O)C3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 PFRGGOIBYLYVKM-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- SOKRNBGSNZXYIO-UHFFFAOYSA-N Resinone Natural products CC(=C)C1CCC2(C)C(O)CC3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 SOKRNBGSNZXYIO-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 230000009477 glass transition Effects 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- -1 lansing filter Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 238000007655 standard test method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/30—Processing
- G21F9/301—Processing by fixation in stable solid media
- G21F9/302—Processing by fixation in stable solid media in an inorganic matrix
- G21F9/305—Glass or glass like matrix
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2214/00—Nature of the non-vitreous component
- C03C2214/14—Waste material, e.g. to be disposed of
Definitions
- the present invention relates to vitrification of radioactive waste, and more particularly, to a glass composition suitable for combustible waste such as gloves, work clothes, vinyl, rubber, etc. generated in a nuclear power plant, and a method for vitrification of flammable waste using the same.
- Combustible wastes such as gloves, work clothes, vinyl and rubbers, which are radioactive wastes generated in nuclear power plants, are solidified with cement or placed in waste drums.
- cement solidification it is necessary to use a technology that creates a solid that has a slower rate of release of radioactive material into the groundwater or does not leak at all.
- Korean Patent No. 10-0768093 Medium and Low Level Radioactive Waste Vitrification Method Using Iron / Phosphate Glass
- Korean Patent No. 10-0432450 Medium and Low Level Radioactive Waste Treatment System
- glass composition for vitrifying flammable waste such as gloves, work clothes, vinyl, rubber, etc.
- the technology of vitrification of high level waste cannot be applied as it is because the type, amount, chemical composition, etc. of waste is higher than high level waste. has never been disclosed.
- Another object of the present invention is to provide a method for vitrifying flammable waste using a flammable waste glass composition.
- the present invention provides a glass composition for vitrifying the flammable waste, SiO 2, Al 2 O 3 , B 2 O 3 , CaO, K 2 O, Li 2 O, MgO, Na 2 O and Provided is a glass composition for combustible waste comprising TiO 2 .
- the flammable waste glass composition may further include CeO 2 , CoO, VO 2 , ZnO, ZrO 2 .
- the glass composition for the combustible waste is SiO 2 30 to 60% by weight , Al 2 O 3 6.5 to 8.5%, B 2 O 3 10 to 16% by weight, CaO 8 to 15% by weight, K 2 O 1 to 6% by weight , Li 2 O 2 to 10% by weight, MgO 0.5 to 6% by weight, Na 2 O 8 to 28% by weight, and TiO 2 2 to 5% by weight, CeO 2 , CoO, VO 2 , ZnO
- the glass composition for combustible waste is 30 to 60% by weight of SiO 2 , 6.5 to 8.5% by weight of Al 2 O 3 , 10 to 16% by weight of B 2 O 3 , 8 to 15% by weight of CaO, and K.
- the present invention provides a method for vitrifying flammable wastes, in which a flammable waste and SiO 2, Al 2 O 3 , B 2 O 3 , CaO, K 2 O, Li 2 O, MgO, Na 2 O and TiO 2 It provides a flammable waste vitrification method characterized in that the glass composition comprising a.
- the glass composition may further include CeO 2 , CoO, VO 2 , ZnO, ZrO 2 .
- the SiO 2 30 to 60% by weight , Al 2 O 3 6.5 to 8.5% by weight, B 2 O 3 10 to 16% by weight, CaO 8 to 15% by weight, K 2 O 1 to 6% by weight, Li 2 O 2 to 10% by weight, MgO 0.5 to 6% by weight, Na 2 O 8 to 28% by weight and TiO 2 2 to 5% by weight, CeO 2 , CoO, VO 2 , ZnO, ZrO 2 further comprises If the glass composition for flammable waste is SiO 2 30 to 60% by weight , Al 2 O 3 6.5 to 8.5%, B 2 O 3 10 to 16% by weight, CaO 8 to 15% by weight, K 2 O 1 to 6% by weight %, Li 2 O 2-10 wt%, MgO 0.5-6 wt%, Na 2 O 8-28 wt%, TiO 2 2-5 wt% and CeO 2 0.1-5 wt%, CoO 0.1-2 wt%, 0.1 to 5% by weight of VO 2 , 1 to
- the present invention as described above, by providing a glass composition suitable for combustible waste such as gloves, work clothes, vinyl, rubber, etc. and the vitrification method of the combustible waste using the same, it is possible to significantly reduce the volume of radioactive waste, as well as combustible waste By vitrifying the flammable waste with a glass composition suitable for vitrification, it is possible to delay or completely block the outflow of radioactive material into the molten solid.
- 5 is a graph of electrical conductivity change of candidate glass SG.
- 11 is a cumulative leaching fraction according to the elements of the candidate glass AG8W1 in the ISO leaching test method.
- the candidate glass selection process for each waste to be vitrified was determined through an additive (base glass frit) selection, candidate glass selection, laboratory evaluation, and an empirical test step as shown in the glass composition selection flowchart of FIG. 1.
- the minerals in the waste to be vitrified should be combined with the additives to produce a glass composition that satisfies the vitrification process and the quality of the molten solid.
- an appropriate additive ie, a base glass frit
- the characteristics of the candidate glass change depending on how much mineral loading the components of the base glass frit are.
- the main items to be evaluated through computer code work are to evaluate whether the viscosity and electrical conductivity values in the vitrification process are in the range of 10-100 poise and 0.1-1.0 S / cm at the operating temperature of 1,150 °C.
- leaching rate of 7-day PCT which is a chemical robustness evaluation, it is evaluated whether the B, Na, Li, and Si elements are less than or equal to 2 g / m 2 . If the above two aspects are satisfied, next, the reduction effect will be very different for each waste, but the candidate glass will be selected by evaluating whether the appropriate reduction ratio is calculated for each waste type.
- the candidate glass selected by computer code work was evaluated by laboratory work to satisfy the characteristics required in terms of vitrification process and molten solid quality, and finally verified by empirical test.
- Experiments were carried out as follows.
- Glass unlike crystals, has a transition region in physical and chemical terms. That is, the volume change according to the temperature can be seen that the volume of the molten liquid at the time of supercooling, the crystal rapidly changes the volume at the melting temperature, but in the case of the glass melt, the volume gradually changes to the equilibrium state. Glass represents the volume change with temperature.
- the temperature at which the change of slope occurs is called the glass deformation temperature or glass transition temperature (T g ) and is called thermodynamic metastable equilibrium.
- the candidate glass AG8W1 and SG were evaluated at about 498 °C and 466.7 ⁇ 498.1 °C using the analytical equipment.
- the softening points of AG8W1 and SG candidate glass were measured at 551 ° C and 547 ° C.
- Compressive strength is an important characteristic when using glass, and has been trying to produce more solid glass by identifying the cause of fracture for a long time.
- the failure process is directly related to the fatigue phenomenon, so the influence of the hysteresis and the characteristic conditions should be well understood, and the surface bonding is a very important factor and should be considered sufficiently to enhance the strength.
- the strength of the glass is the value until breakage penetrates through the glass.
- the AG8W1 and SG candidate glasses were cooled to about 2.7 ° C per minute from the transition temperature, and the compressive strengths were measured at 2,146 psi and 7,985 psi, respectively.
- the US NRC requirements for radioactive waste treatment cements require a compressive strength of at least 500 psi. Molten solids could also apply this requirement, so the compressive strength of candidate glass could be evaluated as good.
- the molten solids generated during the vitrification process must be stable from a chemical point of view in the intermediate storage and final disposal environment.
- glass has been selected as the treatment medium for radioactive waste because of its high chemical robustness for long-term storage without the release of radioactive material into the environment. Therefore, the selected candidate glass compositions were tested and analyzed using internationally recognized leaching methods to evaluate the chemical stability of the molten solids.
- the R7T7 high-level candidate glass in France and the SRL-EA standard glass in the United States were tested in parallel.
- the US EPA TCLP (Toxicity Characteristic Leaching Procedure) test is the most important indicator of the stability of the solids to various accidents after the final disposal of the molten solids.
- the risk that molten solids may face at the final disposal site is the release of radioactive and hazardous substances due to contact with water, and the TCLP test can be considered as a simulation that considers the situation in advance.
- the molten solids (AG8W1, DG-2, SG) generated through the selection study of glass composition include vanadium (V), which is a strong oxidizing agent, and chromium (Cr), which is a harmful oxidant, in order to prevent precipitation of reducible substances generated during the vitrification process. ) And nickel (Ni). Therefore, TCLP test was performed using the three candidate glass compositions.
- TCLP test results Elements regulated under the Conservation Act on Environmental and Recycling (RCRA) (14 in total: Ag, As, Ba, Be, Cd, Cr, Hg, Ni, Pb, Sb, Se, Th, V, As a result of analyzing the degree of leaching into the leaching solution of Zn), the concentrations of all the target elements were analyzed below the lower limit of detection by the analyzer to satisfy all US EPA standards.
- RCRA Conservation Act on Environmental and Recycling
- the leaching test for the chemical durability evaluation of glass was carried out for ANSI / ANS 16.1 (American National Standards Institute / American Nuclear Society 16.1) leaching test, which can be performed for a short period of time (3 months).
- the effective diffusivity was calculated by analyzing the concentrations of the major elements leached from the molten solids and simulated radionuclides such as Co and Cs, and the average values of ten leaching indices determined in ten leaching intervals for each radionuclide were calculated. It was evaluated by the Leachability Index (L i ).
- the US DOE PCT Product Consistency Test
- Candidate glass performed was DG-2, AG8W1, SG and R7T7 of France, SRL-EA (Environmental Assessment) glass manufactured by Savannah River Research Institute in the United States as the reference glass.
- the candidate glasses were R7T7 and reference as shown in FIGS. It showed relatively better leaching resistance than glass.
- the leaching rates of Boron and Sodium were higher than those of other elements, which resulted in the formation of silicate compounds in the leaching interface, which decreased the concentration of silicic acid in the leaching solution, while increasing the leaching of other elements.
- the leaching resistance of the four elements was relatively better than that of DG-2 glass.
- SG glass met the US Hanford high / low-level vitrification limit below 2 g / m2.
- the leaching test was performed using the International Standards Organization (ISO) standard test method.
- the leaching test of AG8W1 was performed to evaluate the leaching behavior of the major elements in the glass structure.
- Figure 10 shows the change of leaching rate of B, Na, Si for 602 days.
- the leaching rates of the three elements in AG8W1 showed a relatively stable leaching rate.
- Figure 11 shows the cumulative leaching fractions for each major element.
- the cumulative leaching fractions of B and Na maintain a very gentle slope, and the Si of the rising curve or the main structure of the glass structure is saturated.
- the concentration of silicic acid in the leachate decreases, but for the other elements, continuous diffusion is believed to continue.
- Example 2 Using three kinds of candidate glass selected in Example 2, an empirical test was performed using a demonstration facility to confirm the ease of vitrification of these glasses and the quality of the molten solid generated in the vitrification process.
- the initial glass melt was prepared using 70 kg of AG8W1 candidate glass, and the waste and base glass frit AG8 was continuously supplied for 6 hours, and the residue was burned, mixed, and increased the amount of glass discharged for one hour. About 10 days of continuous operation. Control of the melt was very easy in the absence of initial ignition and waste supply of the AG8W1 candidate glass used for the test. As a result of analyzing the discharged molten solid, it was found that a homogeneous molten solid was produced.
- the initial glass melt was prepared using 70 kg of SG candidate glass, and continuously supplied waste and base glass frit SG-F for 20 hours and burning, mixing and increasing the amount of glass discharged in one operation cycle for 1 hour. Was operated continuously. Control of the molten metal was very easy in the absence of initial ignition and waste supply of the SG candidate glass used for the test.
- the expected simple reduction cost is estimated to be about 50. Even if the secondary generation waste is considered, the reduction ratio of 30 or more can be achieved.
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Abstract
Description
폐기물 | 실증시험회수 | 운전변수 | 공급률 | 공급형태 | ||
초기점화 | 유리용탕 건전성 | 시험시 공급률(㎏/h) | 적정 예상 공급률(㎏/h) | |||
W1 폐기물 | 5 | 양호 | 양호 | 18 | 18 | 알갱이(폐수지)/절삭(잡고체) |
잡고체 | 2 | 양호 | 양호 | 20 | 20 | 절삭 |
폐수지 | 1 | 양호 | 양호 | 7 | 7 | 알갱이(폐수지) |
Claims (8)
- 가연성 폐기물을 유리화하기 위한 유리조성물에 있어서,SiO2, Al2O3, B2O3, CaO, K2O, Li2O, MgO, Na2O 및 TiO2를 포함하는 가연성 폐기물용 유리조성물.
- 제 1 항에 있어서,상기 가연성 폐기물용 유리조성물은 CeO2, CoO, VO2, ZnO, ZrO2를 더 포함하는 것을 특징으로 하는 가연성 폐기물용 유리조성물.
- 제 1 항에 있어서,상기 가연성 폐기물용 유리조성물은 SiO2 30 내지 60중량%, Al2O3 6.5 내지 8.5중량%, B2O3 10 내지 16중량%, CaO 8 내지 15중량%, K2O 1 내지 6중량%, Li2O 2 내지 10중량%, MgO 0.5 내지 6중량%, Na2O 8 내지 28중량% 및 TiO2 2 내지 5중량%를 포함하는 것을 특징으로 하는 가연성 폐기물용 유리조성물.
- 제 2 항에 있어서,상기 가연성 폐기물용 유리조성물은 SiO2 30 내지 60중량%, Al2O3 6.5 내지 8.5중량%, B2O3 10 내지 16중량%, CaO 8 내지 15중량%, K2O 1 내지 6중량%, Li2O 2 내지 10중량%, MgO 0.5 내지 6중량%, Na2O 8 내지 28중량%, TiO2 2 내지 5중량% 및 CeO2 0.1 내지 5중량%, CoO 0.1 내지 2중량%, VO2 0.1 내지 5중량%, ZnO 1 내지 5중량%, ZrO2 0.5 내지 3중량%를 포함하는 것을 특징으로 하는 가연성 폐기물용 유리조성물.
- 가연성 폐기물을 유리화하는 방법에 있어서,용융로에 가연성 폐기물과 SiO2, Al2O3, B2O3, CaO, K2O, Li2O, MgO, Na2O 및 TiO2를 포함하는 유리조성물을 함께 투입하는 것을 특징으로 하는 가연성 폐기물 유리화 방법.
- 제 5 항에 있어서,상기 유리조성물은 CeO2, CoO, VO2, ZnO, ZrO2를 더 포함하는 것을 특징으로 하는 가연성 폐기물 유리화 방법.
- 제 5 항에 있어서,상기 유리조성물은SiO2 30 내지 60중량%, Al2O3 6.5 내지 8.5중량%, B2O3 10 내지 16중량%, CaO 8 내지 15중량%, K2O 1 내지 6중량%, Li2O 2 내지 10중량%, MgO 0.5 내지 6중량%, Na2O 8 내지 28중량% 및 TiO2 2 내지 5중량%를 포함하는 것을 특징으로 하는 가연성 폐기물 유리화 방법.
- 제 6 항에 있어서,상기 유리조성물은 SiO2 30 내지 60중량%, Al2O3 6.5 내지 8.5중량%, B2O3 10 내지 16중량%, CaO 8 내지 15중량%, K2O 1 내지 6중량%, Li2O 2 내지 10중량%, MgO 0.5 내지 6중량%, Na2O 8 내지 28중량%, TiO2 2 내지 5중량% 및 CeO2 0.1 내지 5중량%, CoO 0.1 내지 2중량%, VO2 0.1 내지 5중량%, ZnO 1 내지 5중량%, ZrO2 0.5 내지 3중량%를 포함하는 것을 특징으로 하는 가연성 폐기물 유리화 방법.
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KR20210096138A (ko) | 2018-11-26 | 2021-08-04 | 오웬스 코닝 인텔렉츄얼 캐피탈 엘엘씨 | 비탄성률이 향상된 고성능 섬유 유리 조성물 |
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