|
|
|
| Study on vitrification of MSWI fly ash with industrial solid waste |
| ZHAO Ang-ran1,2, REN Qiang-qiang2, TONG Hui-ling1 |
1. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;
2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China |
|
|
|
|
Abstract Industrial solid waste with high Si and Al content (coal gangue and blast furnace slag) was used as additive for thermal treatment of municipal solid waste incineration (MSWI) fly ash, to improve its fusibility and properties of products. With the increase of additive, main mineral composition of products were changed from chlorellestadite and wadalite containing Cl to mayenite, larnite, melilite and anorthite. Quaternary basicity (R4) was used to evaluate fusible composition. Alkaline MSWI fly ash (R4 > 1) can be neutralized by acidic industrial solid waste (R4 < 1), to form neutral mixed ash (R4 ≈ 1) which containd 30% coal gangue or 40% blast furnace slag. The fusibility temperatures of neutral mixed ash were the lowest and FT representing complete fusion was 1260 and 1200℃. At 1300℃ glass-ceramics with crystal phase of melilite were formed by vitrification during cooling. Within vitrification, more than 99% of chlorine was separated from the solid phase. By volatilization separation, solidification and stabilization, the leaching capacity of heavy metals Cr, Ni, Zn, Cd and Pb was reduced by more than 95%, while that of Cu was reduced by more than 85%.
|
|
Received: 27 June 2022
|
|
|
|
|
|
| [1] |
Kanhar A H, Chen S, Wang F. Incineration fly ash and its treatment to possible utilization: A review [J]. Energies, 2020,13(24):1-35.
|
| [2] |
中华人民共和国国家统计局.中国统计年鉴 [J]. 北京:中国统计出版社, 2021. National Bureau of statistics of China. China statistical yearbook [J]. Beijing: China statistics press, 2021.
|
| [3] |
Quina M J, Bordado J C, Quinta-Ferreira R M. Treatment and use of air pollution control residues from MSW incineration: An overview [J]. Waste Management, 2008,28(11):2097-2121.
|
| [4] |
Ferraro A, Farina I, Race M, et al. Pre-treatments of MSWI fly-ashes: a comprehensive review to determine optimal conditions for their reuse and/or environmentally sustainable disposal [J]. Reviews in Environmental Science and Bio/Technology, 2019,18(3):453-471.
|
| [5] |
Lu Y, Tian A, Zhang J, et al. Physical and chemical properties, pretreatment, and recycling of municipal solid waste incineration fly ash and bottom ash for highway engineering: A literature review [J]. Advances in Civil Engineering, 2020,2020(12):1-17.
|
| [6] |
Chen Z, Zhang S, Lin X, et al. Decomposition and reformation pathways of PCDD/Fs during thermal treatment of municipal solid waste incineration fly ash [J]. Journal of Hazardous Materials, 2020,394:122526.
|
| [7] |
Lindberg D, Molin C, Hupa M. Thermal treatment of solid residues from WtE units: A review [J]. Waste Management, 2015,37:82-94.
|
| [8] |
Gao J, Wang T, Zhao J, et al. An experimental study on the melting solidification of municipal solid waste incineration fly ash [J]. Sustainability, 2021,13(2):535.
|
| [9] |
Zhang S, Chen Z, Lin X, et al. Kinetics and fusion characteristics of municipal solid waste incineration fly ash during thermal treatment [J]. Fuel, 2020,279:118410.
|
| [10] |
Ito T. Vitrification of fly ash by swirling-flow furnace [J]. Waste Management, 1996,16(5/6):453-460.
|
| [11] |
Izumikawa C. Metal recovery from fly ash generated from vitrification process for MSW ash [J]. Waste Management, 1996,16(5):501-507.
|
| [12] |
Park Y J, Heo J. Vitrification of fly ash from municipal solid waste incinerator [J]. Journal of Hazardous Materials, 2002,91(1-3):83-93.
|
| [13] |
Rani D A, Gomez E, Boccaccini A R, et al. Plasma treatment of air pollution control residues [J]. Waste Management, 2007,28(7):1254-1262.
|
| [14] |
Gao J, Dong C, Wang X, et al. Effect of additives on melting temperature and energy consumption of municipal solid waste incineration fly ash [J]. Waste Management & Research, 2021: 0734242X2098561.
|
| [15] |
Yang G, Ren Q, Zhou L, et al. Effect of Si/Al additives on Cl fate during MSWI fly ash thermal treating process [J]. Fuel Processing Technology, 2022,231:107230.
|
| [16] |
Li C T, Huang Y J, Huang K L, et al. Characterization of slags and ingots from the vitrification of municipal solid waste incineration ashes [J]. Industrial & Engineering Chemistry Research, 2003,42(11): 2306-2313.
|
| [17] |
Ma W, Shi W, Shi Y, et al. Plasma vitrification and heavy metals solidification of MSW and sewage sludge incineration fly ash [J]. Journal of Hazardous Materials, 2020,408:124809.
|
| [18] |
Wong G, Gan M, Fan X, et al. Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment [J]. Journal of Hazardous Materials, 2020,408:124438.
|
| [19] |
Roether J A, Daniel D J, Rani D A, et al. Properties of sintered glass-ceramics prepared from plasma vitrified air pollution control residues [J]. Journal of hazardous materials, 2010,173(1-3):563-569.
|
| [20] |
Luan J, Chai M, Li R, et al. Crystalline phase evolution behavior and physicochemical properties of glass–ceramics from municipal solid waste incineration fly ash [J]. Journal of Material Cycles & Waste Management, 2016,19(3):1-7.
|
| [21] |
Zhao S, Liu B, Ding Y, et al. Study on glass-ceramics made from MSWI fly ash, pickling sludge and waste glass by one-step process [J]. Journal of Cleaner Production, 2020,271:122674.
|
| [22] |
Rodella N, Bosio A, Dalipi R, et al. Waste silica sources as heavy metal stabilizers for municipal solid waste incineration fly ash [J]. Arabian Journal of Chemistry, 2017,10: S3676-S3681.
|
| [23] |
Yang G, Ren Q, Xu J, et al. Co-Melting Properties and Mineral Transformation Behavior of Mixtures by MSWI Fly Ash and Coal Ash [J]. Journal of the Energy Institute, 2021,96:148–157.
|
| [24] |
李军辉,吴 新,刘道洁,等.不同处理方法对硅灰稳固化垃圾焚烧飞灰重金属的影响 [J]. 中国环境科学, 2018, 38(11):4198-4204. Li J, Wu X, Liu D, et al. Effects of different treatment methods on the stabilization of heavy metals in municipal solid waste incineration fly ash using silica fume [J]. China Environmental Science, 2018,38(11): 4198-4204.
|
| [25] |
Geng C, Liu J G, Wu S C, et al. Novel method for comprehensive utilization of MSWI fly ash through co-reduction with red mud to prepare crude alloy and cleaned slag [J]. Journal of Hazardous Materials, 2020,384:121315.
|
| [26] |
Geng C, Chen C, Shi X F, et al. Recovery of metals from municipal solid waste incineration fly ash and red mud via a co-reduction process [J]. Resources Conservation and Recycling, 2020,154:104600.
|
| [27] |
Wang Y, Deng H, Ren Q. Fusion properties of gasified fine ash at high temperature under reducing atmosphere. Part 2: Influence of Fe2O3 [J]. Energy & Fuels, 2019,33(2):747–755.
|
| [28] |
Yu J, Qiao Y, Jin L, et al. Removal of toxic and alkali/alkaline earth metals during co-thermal treatment of two types of MSWI fly ashes in China [J]. Waste Management, 2015,46:287-297.
|
| [29] |
胡小英,田书磊,闫大海,等.氯化剂对垃圾焚烧飞灰中重金属挥发特性的影响 [J]. 中国环境科学, 2008,28(7):614-619. Hu X, Tian S, Yan D, et al. The effect of chlorination agents on the volatilization of heavy metals in fly ash from municipal solid waste incinerator [J]. China Environmental Science, 2008,28(7):614-619.
|
|
|
|
