CN111687168A - Method for co-melting waste incineration ash - Google Patents
Method for co-melting waste incineration ash Download PDFInfo
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- CN111687168A CN111687168A CN202010433946.2A CN202010433946A CN111687168A CN 111687168 A CN111687168 A CN 111687168A CN 202010433946 A CN202010433946 A CN 202010433946A CN 111687168 A CN111687168 A CN 111687168A
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- 238000003181 co-melting Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004056 waste incineration Methods 0.000 title claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 85
- 239000010881 fly ash Substances 0.000 claims abstract description 78
- 239000002956 ash Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 31
- 239000004327 boric acid Substances 0.000 claims description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 2
- 238000002844 melting Methods 0.000 abstract description 22
- 230000008018 melting Effects 0.000 abstract description 22
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 16
- 238000004017 vitrification Methods 0.000 abstract description 12
- 229910052710 silicon Inorganic materials 0.000 abstract description 10
- 238000002386 leaching Methods 0.000 abstract description 9
- 230000001988 toxicity Effects 0.000 abstract description 9
- 231100000419 toxicity Toxicity 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000010703 silicon Substances 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M potassium chloride Inorganic materials [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical group 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of waste residue treatment, and provides a method for co-melting waste incineration ash, which comprises the following steps: mixing fly ash and slag generated by waste incineration and then carrying out co-melting to obtain vitreous slag; the mass ratio of the fly ash to the furnace slag is 1: 2-2: 1; the temperature of the co-melting is 1200-1500 ℃. The invention takes the slag generated by waste incineration as a silicon source and the fly ash for co-melting, realizes 'waste preparation by waste' while ensuring the vitrification of the fly ash, and provides an idea for the standardized development of a slag disposal mode; the invention reduces the melting point of the fly ash by adjusting the proportion of the slag and the fly ash, realizes effective vitrification and leads the heavy metal leaching of the vitreous slag to reach the standard. The results of the examples show that the co-melting by the method of the invention can be used for vitrification at a lower temperature, and the heavy metal leaching toxicity of the vitreous slag can meet the requirements of HJ/T300-2007.
Description
Technical Field
The invention relates to the technical field of waste residue treatment, in particular to a method for co-melting waste incineration ash.
Background
After the household garbage is burned by a grate furnace, about 1-3% of fly ash and 20-23% of furnace slag are generated. The fly ash belongs to dangerous waste, and the conventional fly ash treatment method is 'chelation pretreatment + partition landfill', the corresponding management standard of the method is mature, but the hidden troubles of rapid land consumption and pollution leakage still exist. The high-temperature melting process can form stable glass body by melting the fly ash, and solidify heavy metal substances in the glass body, and is considered as a fly ash disposal technology with harmless and higher resource utilization degree. The raw ash burnt by the grate furnace cannot form a stable aluminosilicate eutectic substance at a lower melting temperature (less than or equal to 1300 ℃) alone due to low content of inorganic inert substances such as Si, Al and the like. The alkalinity (CaO/SiO) of the fly ash of the grate furnace can be effectively adjusted by adding Si sources such as quartz sand and the like2) Thereby promoting the melting effect of the fly ash of the grate furnace and forming a vitreous body. However, the silicon source needs to be purchased separately, which increases the cost of the melt processing.
Furthermore, the treatment of incineration slag in the field has not yet formed a standardized model. The incineration slag generally contains metallic (e.g., Pb, Ni, Sb, Sn, etc.) and non-metallic (e.g., P, Si, Al, S, etc.) elements. At present, the household garbage incinerator slag is mainly used for embankment, roadbed filling materials and the like. However, the heavy metal content in the slag is high, and the problem of heavy metal leakage can be caused under the conditions of weak acidity and humidity for a long time.
Disclosure of Invention
In view of the above, the invention provides a method for co-melting waste incineration ash. The method provided by the invention carries out co-melting on the fly ash and the slag generated by waste incineration, effectively reduces the melting temperature of the fly ash, reduces the leaching toxicity of a melting product, saves the investment cost of a silicon source in the conventional fly ash melting, and can realize harmless treatment of the incineration slag.
In order to achieve the above object, the present invention provides the following technical solutions:
a method for co-melting waste incineration ash comprises the following steps:
mixing fly ash and slag generated by waste incineration and then carrying out co-melting to obtain vitreous slag; the mass ratio of the fly ash to the furnace slag is 1: 2-2: 1; the temperature of the co-melting is 1200-1500 ℃.
Preferably, the mass ratio of the fly ash to the slag is 1: 2; the temperature of the co-melting is 1250-1300 ℃.
Preferably, the time for co-melting is 2-6 h.
Preferably, the fly ash is high-calcium fly ash, and the mass percentage of calcium oxide in the high-calcium fly ash is 20-50%.
Preferably, the mass percentage of the silicon dioxide in the slag is 20-40%.
Preferably, the co-melting further comprises mixing boric acid and fly ash with the slag.
Preferably, the boric acid is added in an amount of 10% or less by mass based on the total mass of the fly ash, the slag and the boric acid.
Preferably, the addition amount of the boric acid is 2.5-5% of the total mass of the fly ash, the slag and the boric acid.
The invention provides a method for co-melting waste incineration ash, which comprises the following steps: mixing fly ash and slag generated by waste incineration and then carrying out co-melting to obtain vitreous slag; the mass ratio of the fly ash to the furnace slag is 1: 2-2: 1; the temperature of the co-melting is 1200-1500 ℃. The method takes the slag generated by waste incineration as a silicon source and the fly ash for co-melting, reduces the cost while ensuring the vitrification of the fly ash, does not need to purchase another silicon source, realizes the purpose of making waste by waste, and provides an idea for the standardized development of a slag disposal mode; according to the invention, the slag is used for replacing conventional silicon source additives (quartz sand and the like), the melting point of the fly ash is reduced by adjusting the proportion of the slag and the fly ash, effective vitrification is realized, and the heavy metal leaching toxicity of the vitreous slag reaches the standard; furthermore, boric acid is added into the fly ash and the slag, and the melting point of the fly ash is further reduced by using the boric acid. The results of the examples show that the heavy metal leaching toxicity of the vitreous slag produced by co-melting using the method of the invention can meet the requirements in HJ/T300-2007.
Drawings
FIG. 1 is an XRD pattern of the slag obtained in comparative example 1 at different melting temperatures;
FIG. 2 is an observation of the slag obtained in example 1 at different ash ratios and different co-melting temperatures;
FIG. 3 is an XRD pattern of the slag obtained in example 3 at different eutectic temperatures and boric acid contents.
Detailed Description
The invention provides a method for co-melting waste incineration ash, which comprises the following steps:
mixing fly ash and slag generated by waste incineration and then carrying out co-melting to obtain vitreous slag; the mass ratio of the fly ash to the furnace slag is 1: 2-2: 1; the temperature of the co-melting is 1200-1500 ℃.
The fly ash and the slag of the invention are preferably the fly ash and the slag generated after the household garbage is burnt by a grate furnace. In the invention, the fly ash is preferably high-calcium fly ash, the mass percentage content of calcium oxide in the high-calcium fly ash is preferably 20-50%, more preferably 24-40%, and the invention does not specifically limit the content of other metal or nonmetal elements in the fly ash; the mass percentage of the silicon dioxide in the furnace slag is preferably 20-40, and more preferably 25-35%; the content of other metal or nonmetal elements in the slag is not particularly limited in the present invention. In a specific example of the invention, specific chemical compositions of fly ash and cinders used are shown in table 1 (listed in the examples section).
In the invention, the mass ratio of the fly ash to the slag is 1: 2-2: 1, preferably 1: 2-1: 1, and more preferably 1: 2; the temperature of the co-melting is 1200-1500 ℃, preferably 1250-1300 ℃; the co-melting time is preferably 2-6 h, and more preferably 3-5 h; the heating means for co-melting is preferably heating by a heating electrode (i.e., resistance melting). In the co-melting process, most of heavy metals with low boiling points volatilize in the melting process and enter a gas phase, the rest heavy metals with high boiling points are wrapped and solidified to form stable vitreous slag, wherein the vitrification temperature of the mixture is related to the proportion of fly ash and slag, the higher the proportion of slag, the lower the vitrification temperature, in the specific embodiment of the invention, when the mass ratio of fly ash and slag is 1:2, the mixture can be vitrified at 1250-1300 ℃, which shows that the addition of slag can obviously reduce the co-melting temperature, realize the effective vitrification of fly ash, reduce the volatilization of salts and heavy metals in fly ash, and achieve the effect of solidifying heavy metals.
In the present invention, the co-melting preferably further comprises mixing boric acid and fly ash with slag; the addition amount of the boric acid is preferably less than or equal to 10% of the total mass of the fly ash, the slag and the boric acid, and more preferably 2.5-5% of the total mass of the fly ash, the slag and the boric acid. In the invention, boric acid can form eutectic with fly ash and slag with low melting point, thereby further reducing the melting point of the mixture.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
The fly ash and the slag used in the examples and the comparative examples are those generated after the household garbage is incinerated in a grate furnace, and the specific chemical compositions are shown in table 1:
TABLE 1 chemical composition of incineration fly ash and slag (oxide form, unit: wt%)
Comparative example 1
Directly melting the fly ash of the grate furnace without adding any silicon source, wherein the temperatures are 1100 ℃, 1200 ℃, 1300 ℃, 1400 ℃ and 1500 ℃, and the melting time is 4h respectivelyThe crystal phase structure of the slag was tested, and the results are shown in fig. 1, in fig. 1: 1-KCl, 2-NaCl, 3-CaCO3，4-CaO，5-Ca11(SiO4)4O2S，6-PbO，7-SiO2，8-ZnS，9-(CaO)12(Al2O3)7，10-Ca2(Al(AlSi)O7)，11-CaS，12-CaCl2·6H2O。
As can be seen from fig. 1, the melting temperature was increased from 1100 ℃ to 1500 ℃, and the decomposition of metal chloride salts such as sodium chloride and potassium chloride and the decomposition of calcium salts such as calcium carbonate and calcium sulfate were observed, but the occurrence of a vitreous material was not observed, indicating that the raw ash was not vitrified.
Example 1
Compounding fly ash and slag, melting at different temperatures, and observing the state of a molten product, wherein the mass ratio of the fly ash to the slag is 1:0, 1:1, 1:2, 2:1 and 0:1 respectively, and the ash and slag mixture compounded at each ratio is co-molten at 1250 ℃, 1300 ℃, 1350 ℃, 1400 ℃ and 1450 ℃ respectively for 4 hours. The observation of the product is shown in FIG. 2.
As can be seen from FIG. 2, when the mass ratio of fly ash to slag is 1:1, vitreous slag can be obtained at 1400 ℃; when the mass ratio of the fly ash to the slag is 2:1, vitreous slag can be obtained at 1500 ℃.
When the mass ratio of the fly ash to the slag is 1:2, the fused product has a brownish brown surface and is obvious in vitrification, the fact that the addition of the slag into the fly ash is beneficial to reducing the fusing temperature and the volatilization of salts and heavy metals in the fly ash to achieve the effect of solidifying the heavy metals is shown, and the vitrification temperature is reduced to 1300 ℃, which shows that the addition of the slag as a silicon source has a good vitrification promoting effect.
Example 2
Compounding fly ash, slag and boric acid, and co-melting the mixture, wherein the mass ratio of fly ash to slag is 1:0, 1:1, 1:2, 2:1 and 0:1, and the addition amount of boric acid in each ratio is 2.5%, 5%, 7.5% and 10% of the total mass of fly ash, slag and boric acid. The melting points of the formulations were tested and the results are shown in table 2:
TABLE 2 melting point (. degree. C.) of the formulations at different boric acid addition ratios and ash ratios
According to the table 2, the melting point of the compound can be reduced within the range of 2.5-10% of the addition of the boric acid, the effect is optimal when the addition of the boric acid is 5%, the consumption of the boric acid is continuously increased, the reduction range of the melting point is small, the addition of the boric acid is controlled by 2.5-5%, and the melting point of the compound can be reduced on the premise of ensuring the cost.
Example 3
The mass ratio of the fly ash to the slag is controlled to be 1:2, and the fly ash and the slag are co-melted at different temperatures and boric acid contents for 4 hours. The product was subjected to XRD test to examine the vitrification effect of the molten product. The test system is divided into seven experimental groups of 6# to 12# in total, and the experimental conditions are shown in Table 3;
experimental conditions of Experimental groups of TABLE 36 # -12 #
| Serial number | Co-melting temperature/. degree.C | Boric acid addition amount/%) |
| 6# | 1300 | 0 |
| 7# | 1350 | 0 |
| 8# | 1400 | 0 |
| 9# | 1250 | 0 |
| 10# | 1250 | 2.5 |
| 11# | 1400 | 2.5 |
| 12# | 1400 | 0 |
The XRD test results of the molten product are shown in fig. 3. As can be seen from fig. 3, under the conditions shown in table 3 (the co-melting temperature is 1250-1400 ℃, and the addition amount of boric acid is 0 or 2.5%), the XRD spectrogram of the obtained molten product has an obvious amorphous "steamed bread peak" with a 2 θ value between 20-40 °, which indicates that the mineral components react to form aluminosilicate substances and some glass phase substances during high-temperature incineration. The results show that the ash mixture is efficiently vitrified under the conditions of the present invention.
Example 4
Controlling the mass ratio of the fly ash to the slag to be 1:2, carrying out co-melting under the conditions of different co-melting temperatures and different addition amounts of boric acid, and detecting the leaching toxicity of the obtained vitreous slag according to the method in HJ/T300.
Wherein, the results of the detection of the co-melting temperature, the addition amount of boric acid and the leaching toxicity are shown in table 4, and the results of the detection of the heavy metal leaching toxicity of the raw slag and the raw fly ash are shown in table 4.
TABLE 4 heavy metal leaching toxicity of vitreous slags under different conditions (HJ/T300-2007)
According to the data in the table 4, the method can effectively vitrify the ash mixture, the heavy metal dissolution toxicity of the obtained vitreous slag meets the requirement in HJ/T300, the utilization of slag to prepare waste from waste is realized, the treatment cost of fly ash is obviously reduced, and a new way is provided for the treatment of the slag.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for co-melting waste incineration ash is characterized by comprising the following steps:
mixing fly ash and slag generated by waste incineration and then carrying out co-melting to obtain vitreous slag; the mass ratio of the fly ash to the furnace slag is 1: 2-2: 1; the temperature of the co-melting is 1200-1500 ℃.
2. The method according to claim 1, wherein the fly ash and slag are present in a mass ratio of 1: 2; the temperature of the co-melting is 1250-1300 ℃.
3. The method according to claim 1 or 2, wherein the co-melting time is 2 to 6 hours.
4. The method according to claim 1 or 2, wherein the fly ash is high calcium fly ash, and the mass percentage of calcium oxide in the high calcium fly ash is 20-50%.
5. The method according to claim 1 or 2, characterized in that the mass percentage of the silicon dioxide in the slag is 20-40%.
6. The method of claim 1, further comprising mixing boric acid and fly ash with the cinders prior to the co-melting.
7. The method according to claim 6, wherein the boric acid is added in an amount of 10% or less based on the total mass of the fly ash, the slag and the boric acid.
8. The method according to claim 6 or 7, wherein the boric acid is added in an amount of 2.5 to 5% by mass based on the total mass of the fly ash, the slag and the boric acid.
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Cited By (5)
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| CN112845498A (en) * | 2020-12-18 | 2021-05-28 | 常熟浦发第二热电能源有限公司 | Harmless treatment method for fly ash and slag generated by waste incineration power generation |
| TWI755298B (en) * | 2021-03-09 | 2022-02-11 | 筌新環保科技股份有限公司 | Environmentally friendly sludge treatment method |
| CN114345888A (en) * | 2021-12-06 | 2022-04-15 | 华南理工大学 | Method for promoting heavy metal chlorination volatilization by blending medical waste incineration fly ash and slag |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
| CN115138668A (en) * | 2022-06-29 | 2022-10-04 | 中国矿业大学(北京) | Fly ash treatment method |
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| TWI755298B (en) * | 2021-03-09 | 2022-02-11 | 筌新環保科技股份有限公司 | Environmentally friendly sludge treatment method |
| CN114345888A (en) * | 2021-12-06 | 2022-04-15 | 华南理工大学 | Method for promoting heavy metal chlorination volatilization by blending medical waste incineration fly ash and slag |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
| CN115138668A (en) * | 2022-06-29 | 2022-10-04 | 中国矿业大学(北京) | Fly ash treatment method |
| CN115138668B (en) * | 2022-06-29 | 2023-05-12 | 中国矿业大学(北京) | Fly ash treatment method |
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