Investigation on combustion performance and ash fusion characteristics of Zhundong coal co-combustion with coal gangue

Deng, Shuanghui; Tan, Houzhang; Wei, Baogang; Wang, Xuebin; Yang, Fuxin; Xiong, Xiaohe

doi:10.1016/j.fuel.2021.120555

Cited by 37 publications

(15 citation statements)

References 24 publications

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“…Hence, it is anticipated that co-combustion of RC and CC will result in enhanced ignition and early ignition of RC. 47…”

Section: Basic Properties Of Raw Fuelsmentioning

confidence: 99%

“…In addition, it can be seen that the 60% RC case has a higher S than the blend of 40% RC, the larger the index S is, the faster the char from the fuel burns. 47 Therefore, the promotion for improved RC combustion performance could be visibly shown by adding CC to RC in a certain compounding ratio.…”

Section: Co-combustion Characteristic Parameters and Combustion Index...mentioning

confidence: 99%

“…The formation of CaSO 4 is by the reaction of calcium and sulfur released in the co-combustion of RC and CC, and or dehydration of gypsum. 47 The reactions associated with the formation of CaSO 4 such as Equation ( 6) and ( 7):…”

Section: Xrd Analysismentioning

confidence: 99%

“…This can reduce the melting temperature of sample ash, resulting in serious slagging behavior. 47,56…”

Section: Xrd Analysismentioning

confidence: 99%

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Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Jia

Qiu

et al. 2022

Intl J of Energy Research

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In this paper, the co-combustion characteristics of the carbon-rich fraction from coal gasification fine slag and corn straw char were investigated. The combustion performance of the blend was studied by TGA, and the properties of bottom ash samples were evaluated by XRD, SEM-EDS, and ICP-MS. The results showed that the addition of corn straw char (CC) to carbon-rich fraction (RC) can improve the combustibility of RC. The kinetic reaction mechanisms of the blend combustion were described by the diffusion model and chemical reaction order model (D1 and O3). The 40%RC case was recommended because of the lowest reaction activation energy. Hematite (Fe 2 O 3 ), quartz (SiO 2 ), anhydrite (CaSO 4 ), and diopside (Ca(Mg, Al)(Si, Al) 2 O 6 ) were the main mineral compounds in the RC-CC ash. With different compounding ratios of RC-CC, significant variability was observed in the degree of denseness and aggregation on the surface of the blend combustion bottom ash. The heavy metal concentrations (V, Cr, Ni, As, Cd and Pb) in the ash were tested to be in accordance with Chinese soil environmental quality standards, and the co-combustion process had a positive impact on the enrichment of V, Cr, and Ni in the bottom ash to some extent. The results obtained can make a reference for the synergistic utilization of RC-CC, and the treatment and reuse of combustion bottom ash samples.

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“…Hence, it is anticipated that co-combustion of RC and CC will result in enhanced ignition and early ignition of RC. 47…”

Section: Basic Properties Of Raw Fuelsmentioning

confidence: 99%

Section: Co-combustion Characteristic Parameters and Combustion Index...mentioning

confidence: 99%

Section: Xrd Analysismentioning

confidence: 99%

“…This can reduce the melting temperature of sample ash, resulting in serious slagging behavior. 47,56…”

Section: Xrd Analysismentioning

confidence: 99%

See 2 more Smart Citations

Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Jia

Qiu

et al. 2022

Intl J of Energy Research

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“…A large number of scholars have done research on the melting characteristics of coal ash, such as Li et al 8 combined the methods of experimental research and quantum chemical calculations to study the effect of kaolin on the ash melting characteristics of Zhundong high alkali coal and the mineral evolution law during ash melting processes. Furthermore, the behavior mechanism of kaolin capturing alkali metals was also studied from the perspective of mineral microstructure features; Deng et al 9 used thermogravimetric analysis (TGA) to investigate the melting characteristics of Zhundong coal (ZC), coal gangue (CG), and ZC−CG blends with 10, 20, 30, 40, and 50% CG. The ash melting characteristic temperatures and mineral transformation behaviors during the ash melting process were also determined by analytical instruments; Zhou et al 10 used a horizontal chamber furnace to investigate the effects of two biomass ashes (corn stalk (CS) and wood pellet (WP)) on the sintering behaviors of two types of coals (high-melting Shanxi coal (SX) and low-melting Shenhua coal (SH)); Zhang et al 11 investigated the potassium fixation ability and ash melting characteristics during the gasification of corn stalk coke blended with coal ash in a CO 2 atmosphere; Liang et al 12 studied the change of mineral composition in ash and the effect of CaO on the melting characteristics of coal ash by adding different contents of CaO to coal ash; Fan et al 13 investigated the effects of peanut hull (PH) ash on the initial sintering and fusion temperatures of high-melting coal ashes; Wang et al 14 used an ash fusion melting point meter and FactSage software to compare the ash melting characteristics of several common coal types and coal blends in Shougang.…”

Section: Introductionmentioning

confidence: 99%

Research on the Ash Melting Characteristics of Blended Coal Based on DFT Calculations

Chai

Fan

et al. 2021

ACS Omega

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Low-ash-melting-point bituminous coal and high-ash-melting-point anthracite coal are mixed and burned in different proportions. The ash melting characteristics of blended coal were determined experimentally. At the same time, the ash samples of bituminous coal, anthracite, and blended coal were analyzed by X-ray diffraction (XRD), and the ash melting characteristic improvement mechanism of blended coal was analyzed by quantum chemical calculations. The results show that when high-ash-melting-point anthracite is added, the ash melting characteristics of blended coal are improved, and the deformation temperature, softening temperature, hemispheric temperature, and flow temperature of the blended coal are significantly increased. The melting point of blended coal ash with a bituminous coal ratio of less than 50% can meet the requirements of blast furnace injection. The reason for the improved melting characteristics of the blended coal ash is that mullite in anthracite ash reacts with gehlenite in bituminous coal ash during the combustion process to produce anorthite.

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Ignition of two-component and three-component fuel mixtures based on brown coal and char under slow heating conditions

Zhuikov

Glushkov

Kuznetsov

et al. 2022

J Therm Anal Calorim

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Investigation on combustion performance and ash fusion characteristics of Zhundong coal co-combustion with coal gangue

Cited by 37 publications

References 24 publications

Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Assessment on combustion performance and bottom ash properties of carbon‐rich fraction from coal gasification fine slag co‐combustion with corn straw char

Research on the Ash Melting Characteristics of Blended Coal Based on DFT Calculations

Ignition of two-component and three-component fuel mixtures based on brown coal and char under slow heating conditions

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