Review and update of the applications of organic petrology: Part 2, geological and multidisciplinary applications

Suárez-Ruiz, Isabel; Flores, Deolinda; Filho, João Graciano Mendonça; Hackley, Paul C.

doi:10.1016/j.coal.2012.03.005

Cited by 46 publications

(15 citation statements)

References 127 publications

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“…These varied concentrations occur due to the undulatory surface forms of the phyllosilicates ( Figure 5C), where fractures and voids facilitate their deposition ( Figure 5D). The surface cavities of the aggregates were filled with compacted organic matter, and disorderly surface deposits of pyrite crystals were noted elsewhere [15,17]. The chemical composition of the four raw tailings samples (Table 5) indicated that they were all of a silico-aluminous nature with percentages (SiO 2 + Al 2 O 3 ) of between 50% and 70% of the total weight.…”

Section: Raw Materialsmentioning

confidence: 99%

“…Environmental impacts and human health problems in coal-mining environments have also been extensively researched over many years [13][14][15][16][17][18]. There is a long list of environmental hazards associated with coal mining: visual impacts on the landscape, air, and even noise pollution, soil erosion, soil and sediment contamination, slag heaps and slag-heap fires, subsidence, surface and groundwater pollution, and a general degradation of local biodiversity [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

et al. 2018

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Abstract:The generation of enormous volumes of mine-tailing waste is standard practice in the mining industry. Large quantities of these tailings are also sources of kaolinite-rich materials that accumulate in slag heaps, causing significant environmental degradation and visual impacts on the landscape. The consequences of coal refuse dumped in slagheaps calls for the study of eco-innovative solutions and the assessment of waste types. Moreover, the environmental benefits of reusing large amounts of contaminated waste are also evident. Hence, the objective of this investigation is to expand current knowledge of new siliceous-aluminium minerals and their pozzolanic activity. Four raw tailing samples are characterized to determine their chemical (by ICP/MS analysis), morphological (by SEM/EDX analysis), and mineralogical (by XRD analysis) compositions prior to their thermal activation that transforms the inert wastes at various temperatures into materials with cementitious properties. The results of XRD analysis following activation confirmed that the kaolinite content is fully transformed into metakaolinite. The coal refuse samples presented sufficiently reliable levels of pozzolanic activity for use as additives in industrial cements.

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Section: Raw Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

et al. 2018

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“…The thermally altered carbon grains have also been reported in the combustion products of coals of higher ranks (anthracites) (Hower et al, 2017). The most commonly observed thermal changes of coal were observed in samples obtained from selfheated coal waste dumps (Misz and Fabiańska, 2007;Suárez-Ruiz et al, 2012), or intrusive affected coal seams (Singh et al, 2007).…”

Section: The Petrographic Analysis Of Fly Ash Bottom Ash and Slagmentioning

confidence: 83%

Petrographic composition of coals and products of coal combustion from the selected combined heat and power plants (CHP) and heating plants in Upper Silesia, Poland

Mirkowski

Jelonek

2019

International Journal of Coal Geology

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Coal samples and by-products resulting from the combustion process collected from seven combined heat and power (CHP) plants and heating plants located in Upper Silesia, southern Poland, were subjected to petrographic analysis. The coal used as a fuel in these plants was collected from mines of the Upper Silesian Coal Basin; it occurs in a wide range of coalification and has variable quality parameters. The coal is dominated by macerals from the vitrinite group; however, a high content of macerals from the inertinite group has also been observed. Based on petrographic analysis of ash and slags, a highly variable mineral matter content, confirming variable combustion efficiency, has been found. In the case of samples collected from large CHP plants with pulverized and fluidized bed boilers, the mineral matter content is high. The share of mineral matter in combustion products clearly decreases in the case of smaller power plants and heating plants, especially those using grate boilers. The increased content of unburned coal can be explained by the fact that coals of higher rank are often used as fuels in the mentioned plants. The greatest diversity of char forms can be observed in the case of samples collected from small CHP plants. In the case of three samples of slag, collected from small heating plants using grate boilers, additional presence of coke, thermally altered, and unaltered coal has also been found.

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“…The self-heating propensity of coal and coal-rich materials due to the oxidation of sulfides promotes the ignition. The investigation of coal-related fires occurring all over the world has been the subject of several studies that focused on the economic losses of coal resources, the environmental impacts associated with the combustion process, and monitoring and fire-fighting possibilities [31].…”

Section: Coal-related Fires-a Geoenvironmental Problemmentioning

confidence: 99%

ECOAL Project—Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology

et al. 2017

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Abstract:The combustion of coal wastes resulting from mining is of particular environmental concern, and the importance of proper management involving real-time assessment of their status and identification of probable evolution scenarios is recognized. Continuous monitoring of the combustion temperature and emission levels of certain gases allows for the possibility of planning corrective actions to minimize their negative impact on the surroundings. Optical fiber technology is well suited to this purpose and here we describe the main attributes and results obtained from a fiber optic sensing system projected to gather data on distributed temperature and gas emissions in these harsh environments.

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Review and update of the applications of organic petrology: Part 2, geological and multidisciplinary applications

Cited by 46 publications

References 127 publications

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

Petrographic composition of coals and products of coal combustion from the selected combined heat and power plants (CHP) and heating plants in Upper Silesia, Poland

ECOAL Project—Delivering Solutions for Integrated Monitoring of Coal-Related Fires Supported on Optical Fiber Sensing Technology

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