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摘要:
针对我国粉煤灰堆积造成的日益突出的土地和环境污染问题，论文综述了我国粉煤灰资源开发与应用现状；简要介绍了粉煤灰在大掺杂量方面的应用，如建材领域、农业领域、矿山领域和环保领域；详细介绍了粉煤灰在高附加值领域的应用现状，如粉煤灰的深度分离、氧化铝提取、稀有金属提取和高附加值产品合成等方面。最后，探讨了粉煤灰资源化利用存在的问题，并提出了未来粉煤灰资源化开发利用的发展趋势。
Abstract:With the increasingly outstanding problems of land and environmental pollution caused by the accumulation of fly ash in China. This paper summarizes the present situation of development and application of fly ash resources. This paper briefly introduces the application of fly ash in large amount of doping, such as building materials, agriculture, mining and environmental protection. Moreover, the application status of fly ash in high value-added field is introduced in detail, such as deep separation of fly ash, extraction of alumina, extraction of rare metals and synthesis of high value-added products. Finally, the paper proposes the existing problems and the development trend of fly ash resource utilization in future.
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Key words:
- fly ash /
- comprehensive utilization /
- high doping amount /
- high added value
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表 1 粉煤灰分类依据燃煤锅炉类型、ASTM C618、化学组成、物相组成、国标1596-1911
Table 1. Classification for fly ashes based on Types of combustion boilers, ASTM C618, chemical composition, Phase composition and GB1569
Classification for fly ashes based on types of Coal-fired Boilers Class Calcination temperature(℃) Morphology LOI(%) Market share(%) Circulating fluidized bed 850~950 Flake 1~3 10 Pulverized coal fired boiler 1 300 spherical 10~13 90 Classification for fly ashes based on ASTM C618 Class SiO2+Al2O3+Fe2O3 (%) SO3(%) Moisture(%) LOI(%) C > 50、 < 70 < 5 < 3 < 6 F > 70 < 12 Classification of fly ash based on chemical composition Class SiO2+Al2O3(%) Al2O3(%) SiO2(%) High alumina fly ash ~80 45~65 < 35 Fly Ash ~80 < 27 > 50 Classification of fly ash based on chemical composition Class SiO2+Al2O3+K2O+TiO2+P2O5(%) CaO+MgO+SO3+Na2O+MnO (%) Fe2O3 (%) Sialic > 77 < 11.5 < 11.5 Calsialic < 89 > 11.5 < 11.5 Ferrisialic < 89 < 11.5 > 11.5 Ferricalcsialic > 77 > 11.5 > 11.5 Classification of fly ash based on Phase composition Class Quartz+Mullite(%), Glass(%), Oxyhydroxides+Carbonates+Sulphates+Other Silicates(%) Pozzolanic Glass > 82, Quartz+Mullite < 17.5 Inert Quartz+Mullite > 17.5, Oxyhydroxides+Carbonates+Sulphates+Other Silicates < 17.5 Active Oxyhydroxides+Carbonates+Sulphates+Other Silicates > 52.5, Glass < 82 Mixed Quartz+Mullite > 17.5, Oxyhydroxides+Carbonates+Sulphates+Other Silicates > 17.5 Classification for fly ashes based on GB1596-1991 Class Fineness(amount retained on 0.045 mm sieve, %)≤ Water requirement ratio(%)≤ LOI(%)≤ Moisture(%)≤ SO2(%)≤ Ⅰ 12 95 5 1 3 Ⅱ 20 105 8 1 3 Ⅲ 45 115 15 - 3 
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| 引用本文: |
王丽萍, 李超. 粉煤灰资源化技术开发与利用研究进展[J]. 矿产保护与利用, 2019, 39(4): 38-45. doi: 10.13779/j.cnki.issn1001-0076.2019.04.007
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| Citation: |
WANG Liping, LI Chao. Research Progress on Development and Utilization of Fly Ash Resource Technology[J]. Conservation and Utilization of Mineral Resources, 2019, 39(4): 38-45. doi: 10.13779/j.cnki.issn1001-0076.2019.04.007
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