Effects of Mechanical Activation on Physical and Chemical Characteristics of Coal-Gasification Slag
Source abstract
Abstract
Coal-gasification slag (CGS) was subjected to mechanical grinding by three different methods. We studied the effects of mechanical activation on various physical and chemical characteristics of the CGS, including particle-size distribution, specific surface area, mineral composition, degree of crystallinity, particle morphology, chemical bonding, surface activity and binding energy, anionic-polymerization degree and hydration properties. The results show that there are different effects on CGS characteristics depending on the type of activation applied. Mechanical activation also can increase the specific surface area and the dissolution rates of activated SiO2 and Al2O3, and the major elements (O, Si, Al, Ca) in CGS, whereas the degree of crystallinity and of polymerization of [SiO4] and [AlO6] are reduced by mechanical activation. We also found that the effects of different mechanical-activation methods on the compressive strength and activity were similar and could accelerate the hydration process.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production · Mining and Gasification Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
State Key Laboratory of Green Building in Western China, Xi’an University of Architecture and Technology, Xi’an 710055, China
Funding
National Natural Science Foundation of China · Independent Research and Development project of State Key Laboratory of Green Building in Western China · Natural Science Foundation of Shaanxi Provincial Department of Education
References (46)
Show source-provided references
1. Characteristics of different sized slag particles from entrained-flow coal gasification10.1021/acs.energyfuels.5b01326 ↗
2. Ratafia-Brown, J.A., Manfredo, L.M., Hoffmann, J.W., Ramezan, M., and Stiegel, G.J. (2002). In an environmental assessment of IGCC power systems. Nineteenth Pittsburgh Coal Conference, University of Pittsburgh.
3. (2002). Gasification Markets and Technologies-Present and Future an Industry Perspective.
4. Characterisation of residual carbon from entrained-bed coal water slurry gasifiers10.1016/j.fuel.2006.09.033 ↗
5. Structure characteristics and gasification activity of residual carbon from entrained-flow coal gasification slag10.1016/j.fuel.2014.01.011 ↗
6. Structure characteristics and composition of hydration products of coal gasification slag mixed cement and lime10.1016/j.conbuildmat.2019.03.163 ↗
7. Characteristics and catalytic actions of inorganic constituents from entrained-flow coal gasification slag10.1016/j.joei.2014.04.001 ↗
8. Characterizations of the hot blast furnace slag on coal gasification reaction10.1016/j.applthermaleng.2015.12.029 ↗
9. The surface characteristics and reactivity of residual carbon in coal gasification slag10.1021/ef9005065 ↗
10. Characterization of unburned carbon present in coarse gasification ash10.1016/j.fuel.2007.05.022 ↗
11. The gasification reactivity of unburned carbon present in gasification slag from entrained-flow gasifier10.1016/j.fuproc.2009.04.006 ↗
12. Utilisation of IGCC slag and clay steriles in soft mud bricks (by pressing) for use in building bricksmanufacturing10.1016/S0956-053X(02)00075-2 ↗
13. Aineto, M., Acosta, A., Rincón, J.M., and Romero, M. (2005). Production of Lightweight Aggregates from Coal Gasification Fly Ash and Slag. World Coal Ash, 11–15.
14. Yoshitaka, I. (2012, January 25–27). Utilization of coal gasification slag collected from IGCC as fine aggregate for concrete. Proceedings of the EUROCOALASH Conference, Thessaloniki, Greece.
15. Recycling of residual IGCC slags and their benefits as degreasers in ceramics10.1016/j.jenvman.2013.05.055 ↗
16. Utilization of the gasification-melting slag from municipal solid waste as fine aggregate for concrete, Concr
17. The mechanical properties of coal gasification slag as a component of concrete and binding mixtures
18. Laboratory evaluation of ladle furnace slag in unbound pavement-base/subbase applications10.1061/(ASCE)MT.1943-5533.0001724 ↗
19. Environmental impacts of utilizing waste steel slag aggregates as recycled road construction materials
20. Stabilization of recycled demolition aggregates by geopolymers comprising calcium carbide residue, fly ash and slag precursors10.1016/j.conbuildmat.2016.03.150 ↗
21. Stabilisation of demolition materials for pavement base/subbase applications using fly-ash and slag geopolymers: Laboratory investigation10.1061/(ASCE)MT.1943-5533.0001526 ↗
22. Ward, C., Heidrich, C., and Yeatman, O. (2014). Production and handling of coal combustion products. Coal Combustion Products Handbook, Ash Development Association of Australia. [2nd ed.].
23. Mechanical alloying and milling10.1016/S0079-6425(99)00010-9 ↗
24. Effects of ball milling time on the synthesis and consolidation of nanostructured WC–Co composites10.1016/j.ijrmhm.2009.05.006 ↗
25. Effects of milling and subsequent consolidation treatment on the microstructural properties and hardness of the nanocrystalline chromium carbide powders10.1016/j.ijrmhm.2011.07.004 ↗
26. Effects of high energy ball-milling on the sintering behavior and piezoelectric properties of PZT based ceramics10.1016/j.ceramint.2006.04.017 ↗
27. The effects of mechanical and chemical modification of TiO2 nanoparticles on the surface chemistry, structure and fouling performance of PES ultrafiltration membranes10.1016/j.memsci.2010.10.019 ↗
28. Ball milling of class-F Indian Fly ash obtained froma thermal power station
29. Modification in properties of fly ash through mechanical and chemical activation10.9734/ACSJ/2012/2052 ↗
30. Wet ball milling of zeolite HY10.1016/j.powtec.2004.03.012 ↗
31. Critical rotation speed for ball-milling10.1016/S0032-5910(99)00031-5 ↗
32. Interparticle interactions and lacunarity of mechano-chemically activated fly ash10.1016/j.powtec.2014.12.006 ↗
33. Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant10.1016/j.conbuildmat.2015.10.144 ↗
34. Kumar, S., Kumar, R., Alex, T.C., Bandopadhyay, A., and Mehrotra, S.P. (July, January 28). Effect of mechanically activated fly ash on the properties of geopolymer cement. Proceedings of the 4th world congress geopolymer, Saint-Quentin, France.
35. Arjuan, P., Silbee, M.R., and Roy, D.M. (1997, January 2–6). Quantitative determination of the crystalline and amorphous phases in low calcium fly ashes. Proceedings of the 10th International Congress of the Chemistry of Cement, Gothenburg, Sweden.
36. A review on mechanochemical synthesis of functional materials10.1016/j.apt.2012.05.002 ↗
37. The physical–chemical characterization of mechanically-treated CFBC fly ash10.1016/j.cemconcomp.2007.08.006 ↗
38. De-agglomeration of hydrophobic and hydrophilic silica nano-powders in a high shear mixer10.1016/j.powtec.2009.06.003 ↗
39. Influence of suspension stability on wet grinding for production of mineral nanoparticles10.1016/j.partic.2007.12.001 ↗
40. Preparation and characterization of fly ash cenospheres supported CuO–BiVO4 heterojunction composite10.1016/j.apsusc.2014.02.001 ↗
41. Characterization of metal–biomass interactions in the lanthanum (III) biosorption on Sargassum sp. using SEM/EDX, FTIR, and XPS: Preliminary studies10.1016/j.cej.2013.11.042 ↗
42. Parameter analysis of damaged region for laminates with matrix defects10.1177/1099636219842290 ↗
43. Mechanical activation of fly ash: Effect on reaction, structure and properties of resulting geopolymer10.1016/j.ceramint.2010.09.038 ↗
44. Influence of reactivity of fly ash on geopolymerization10.1179/174367607X159293 ↗
45. Mechanical and microstructural properties of alkali-activated fly ash geopolymers10.1016/j.jhazmat.2010.04.064 ↗
46. Numerical analysis of axially loaded RC columns subjected to the combination of impact and blast loads10.1016/j.engstruct.2020.110924 ↗