The mineral composition of CG before and after Calcination was determined by XRD Ultima IV Rigaku Japan according to the specification of the X ray diffractometer JB/T 9400 2010 41 and the
The results will contribute to a better understanding of the co combustion process of coal gangue and coal slime in O2/CO2 atmosphere and provide basic data for the practical industrial application of coal gangue and slime Zhou C Liu G Yan Z Fang T Wang R Transformation behavior of mineral composition and trace elements during
The mineral composition of coal gangue is intricate Ga can exist in both inorganic minerals and organic matter [19 20] Ge is mainly associated with organic matter in both coal and coal gangue although a small proportion of Ge is probably related to the inorganic matter in coal gangue
Abstract Among coal mining related wastes coal gangue CG is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A thorough understanding of environmental concerns associated with the current model of
In this study the microstructure mineral composition and precipitation of heavy metal elements of coal gangue with different weathering degrees were analyzed through electron microscopy X ray
Since 316 individual minerals and 188 mineral groups are recognized in fly ash it is one of the most complex materials in terms of characteristics [22] Table 1 summarizes coal fly ash chemical composition ranges worldwide It appears that the SiO 2
It is observed that the higher content of quartz SiO 2 kaolinite Al 4 [Si 4 O 10] OH 8 and illite FeTiO 3 in the mineral composition of coal gangue corresponds to a higher concentration of silicon aluminum elements This in turn contributes to improved hardness and decreased water absorption rate [32] Furthermore it is evident
Coal gangue is a by product generated from coal mining and washing Using coal gangue as aggregate is an effective approach of valorization this high volume industrial waste not only solving the environmental issue of accumulation but also reducing the mining of natural aggregate The mineral composition of CGAs and NA were detected by X
The mineral composition of coal gangue from different mining areas formed in different sedimentary environments determined its chemical elemental concentration characteristics The Nanyangpo samples exhibited high SiO 2 53 68% and low Fe 2 O 3 contents % which attributed to the enrichment of quartz and rare pyrite Table 2
Co combustion is a technology that enables the simultaneous and efficient utilization of biomass and coal gangue CG Nevertheless the factors that affect the combustibility of co pyrolytic char
The utilization of coal gangue is usually subjected to calcination to achieve high chemical reactivity and exclude carbon The correlation between the composition and properties of coal gangue during calcination is essential for its applications In this paper the effect of chemistry and minerals of coal gangues on the thermal behavior structural evolution and
Coal gangue is a mixture of a variety of rock and mineral composition with low carbon content Normally its calorific value increases with the increase of carbon mass fraction and volatiles in contrast decreases with the increase of ash Coal gangue has a wide range of applications in building material industry energy industry
Based on the mineral composition and chemical characteristics of coal gangue researchers have begun to explore its potential as a cementitious material Notably coal gangue contains a rich amount of kaolinite which can transform into metakaolin MK with pozzolanic activity through calcination at temperatures ranging from 450 to 850°C [21
1 Introduction Coal gangue is the major exploiting residues approximately 10 15% of coal production produced during coal mining which contains high ash content low carbonaceous composition and low calorific value [1] With the excellent heat and mass transfer properties circulated fluidized bed combustion technology developed for co firing coal gangue
Coal gangue CG is a solid waste generated during coal mining washing and processing accounting for 15 20% of coal production It is considered one of the largest industrial solid wastes in terms of discharge and accumulation amounts Wu et al 2017 As the world s largest coal producer China had accumulated over 7 billion tons of coal gangue by 2022
The microstructure and phase composition of coal gangue before and after calcination were analysed using scanning electron microscopy SEM and X ray diffraction XRD Ceramic specimens were fabrica Table 1 summarises the mineral composition of the raw and calcined coal gangue determined by Riet veld refinement The kaolinite content
The mineral composition of coal gangue could be obtained by this experiment Inductively Coupled Plasma Mass Spectrometry ICP MS The concentrations of radioactive elements U and Th in coal gangue and soil were measured using the X series II ICP MS developed by Thermo Fisher Scientific Company The main experimental procedure is as
In comparison to coal coal gangue has a higher mineral content which results in Si Al Ca Mg K and Na presenting as major elements The unique composition feature of coal gangue from this area may affect the properties of its combustion byproducts as well as the speciation of trace elements The mineral compositions of bottom ash and
The mineral composition of coal gangue and combustion ash were determined by X ray powder diffraction techniques XRD each of samples was analyzed using a PHILIPS X Pert PRO X ray diffractometer with Cu K alpha radiation The pattern was recorded over a 2h interval of 10 70° with a step increment of °
The chemical composition see Table 1 reflects the mineral composition of the coal gangue The relatively high content of SiO 2 Al 2 O 3 and Na 2 O indicates the presence of quartz kaolinite mica and feldspars The content of K 2 O stems from the presence of illite whereas Fe 2 O 3 is associated with hematite There are also traces of
Coal gangue used in this study was obtained from JingYang Coal Washing Plant which is located in Baotou City of China The mineralogical phase was characterized by XRD as shown in Fig indicates kaolinite Al 2 O 3 ·2SiO 2 ·2H 2 O and quartz SiO 2 are the major crystallized minerals presented in the raw coal chemical composition and
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