Mineralogy and microstructure of ash deposits from the Zhuzhou coal-fired power plant in China

Zhang, Junying; Zhao, Yuemin; Wei, Chao; Yao, Bin; Chen, Zheng

doi:10.1016/j.coal.2009.12.004

Cited by 32 publications

(13 citation statements)

References 41 publications

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“…Mass fractions of Fe and Al in various types of dust and soil particles, coal, and combustion ashes. Red circles and black dots enclosed by red circle represent typical fly ash [ Yuan et al ., ; Liu et al ., ; Koukouzas et al ., ; Liu et al ., ; Cao et al ., ; Wang et al ., ; Vassilev and Vassileva , ; Zhang et al ., ; Tang et al ., ; Zhang et al ., ] and bottom ash [ Liu et al ., ; Wang et al ., ], respectively; red dots represent fly ash from steel plant [ Prati et al ., ; Geagea et al ., ; Tsai et al ., ]; green dots with red circles represent fly ash from biomass burning [ Gaudichet et al ., ; Yamasoe et al ., ]; black squares represents coal [ Querol et al ., ; Liu et al ., ; Zhang et al ., ; Dai et al ., , ; Dai et al ., , ; Yang , ; Song et al ., ; Wang et al ., ; Yang , ; Sun et al ., ; Zhou et al ., ; Li et al ., ]; orange, blue, green and purple diamonds represent desert dust [ Li et al, ; Ishizaka , ; Tian et al ., ; Mori et al ., ; Zhang et al ., ], river dust [ Li et al ., ; Tan et al ., ; Lin , ], agriculture and topsoil dust [ Su et al ., ; Li et al ., ; Yanai et al ., ], and urban dust [ Dong et al ., ], respectively. The blue‐shaded area represents the range (i.e., 1.3 to 2.7) of Fe to Al ratios in particles collected in seawater from the SEATS 2007 observations [ Ho et al, ].…”

Section: Methodsmentioning

confidence: 99%

Atmospheric iron deposition in the northwestern Pacific Ocean and its adjacent marginal seas: The importance of coal burning

Lin

Chen

et al. 2015

Global Biogeochemical Cycles

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This study applied a regional air quality model, incorporated with an emission module, to quantitatively differentiate the atmospheric iron sources originating from lithogenic dusts or coal-burning fly ashes deposited in the Northwestern Pacific Ocean and its marginal seas. Particular attention was paid to the high iron content of fly ashes emitted from steel and iron plants burning coals. Using the year 2007 as an example, the modeling results exhibit large seasonal variations in iron deposition, with highest deposition fluxes occurred during spring and autumn, which are comparable to the seasonal fluctuation of chlorophyll a concentrations estimated by satellite images in the oceanic regions. Fly ash from coal burning accounted for 7.2% of the total iron deposited over the northwestern Pacific Ocean and 15% of that over the northern South China Sea. After considering the difference of iron solubility in the aerosols, anthropogenic aerosol associated with coal burning would be the major bioavailable iron source in the surface water of the oceanic regions.

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Section: Methodsmentioning

confidence: 99%

Atmospheric iron deposition in the northwestern Pacific Ocean and its adjacent marginal seas: The importance of coal burning

Lin

Chen

et al. 2015

Global Biogeochemical Cycles

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“…3. These pores, which decrease thermal conductivity of the particles, have a significant influence on the growth of deposit [7]. Also, the black clinkers from the FBAC had liquid phases and some pores as shown in Fig.…”

Section: Optical and Sem Analyses Of The Clinkersmentioning

confidence: 95%

Characteristics of clinker formation in a circulating fluidized bed boiler firing Korean anthracite

Park

Jung

Lee

2011

Korean J. Chem. Eng.

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To shed light on the causes of clinker formation during the initial operation period of the Tonghae circulating fluidized bed (CFB) boiler, which uses Korean anthracite as fuel, the properties of ash, sand and limestone particles and the mixtures of each gradient have been characterized. The clinkers formed in the loopseals and the fluidized bed ash cooler (FBAC) of the CFB boiler were also characterized by analyzing the composition, the surface phenomena and the crystal structure of the clinkers. As a result, the black clinker was found to come from the sand particles and the composition of the white clinker was found to be similar to that of ash particles. The cause of the clinker formation in the FBAC proved that ash was sticking to molten or sintered phases in the high temperature regions in the boiler. On the other hand, the composition of the ash changed with the particle size, showing an enrichment of Fe 2 O 3 as the particle size decreased. Also, the ash particles between 75-100 µm contained more than 11% CaO which resulted in low initial deformation temperature of the particles. So it is possible to explain that the amount of Fe and Ca in the fine particles of the ash plays a crucial role in the formation of agglomerates in the CFB boiler.

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“…Besides the conventional pollutants of sulfur and nitrogen, it is enriched in some toxic elements which are present in less than 0.1% in coal gangue matrix [2][3][4][5]. Because of the existence of harmful trace elements in coal gangue, large quantities of coal gangue piled on the land can cause serious environmental problems by polluting the air, water, and soil as well as resulting in ecological risk [6][7][8][9][10][11]. Therefore, some reasonable methods should be taken to reduce the amount of coal gangue.…”

Section: Introductionmentioning

confidence: 99%

Trace Elements in Coal Gangue: A Review

Guo¹

2018

Contributions to Mineralization

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Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. Now, coal gangue utilization is a matter of great concern and has attracted wide interest. However, some toxic trace elements in coal gangue should be paid more attention during the utilization of coal gangue. In this article, the modes of occurrence and the leaching characters of trace elements in coal gangue were introduced according to the result of the sequential extraction method and the leaching method. The release character of trace elements during combustion of coal gangue and the environmental implication of trace elements in coal gangue were also discussed. The sulfide-bound trace elements are dominant form in coal gangue. Leaching behavior of trace elements from coal gangue is affected by many factors. Different trace elements presented different transformation behaviors. Trace elements in coal gangue could release out and produce environmental implication in various degrees, depending on the type of trace elements.

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Mineralogy and microstructure of ash deposits from the Zhuzhou coal-fired power plant in China

Cited by 32 publications

References 41 publications

Atmospheric iron deposition in the northwestern Pacific Ocean and its adjacent marginal seas: The importance of coal burning

Atmospheric iron deposition in the northwestern Pacific Ocean and its adjacent marginal seas: The importance of coal burning

Characteristics of clinker formation in a circulating fluidized bed boiler firing Korean anthracite

Trace Elements in Coal Gangue: A Review

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