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Дата издания
30.06.2025Область исследования
Тип исследования
Аннотация (краткое описание)
The whole world aims to reducecoal consumption, but despite such a policy,there are countries where its con-sumption continues to grow (China, India). If coal consumption grows, the volume of ash and slag waste (materials) that must be utilized and processed to obtain final products grows. The main elements included in the by-product of coal combustion are SiO2, Al2O3, and Fe2O3. The paper provides a review of the use and processing of ash and slag materials for recycling as well as potential directions for their disposal: as well as potential directions for their disposal: cement production, geopolymer, in zeolite synthesis, microsphere separation, in agriculture, in land reclamation, in phytoremediation as reagents for water purifi-cation, in road construction for backfilling abandoned mines. The authors employed physicochemical analysis methods to confirm that the primary components of the material are SiO2(65.9%) and Al2O3(22.5%). It has been established that a high proportion of silicon and aluminum can be an effective raw material for construction and geopolymer materials, as well as in the production of ceramic products. Availability of Fe2O3(5.54%) suggests possibilities for its use in catalytic processes and pigment production. The alkaline reaction of the aqueous extract of the ash (pH=9.25) correlates well with its chemical com-position and confirms the presence of active alkaline components in the material. This alkaline nature of the ash favors geopol-ymerization processes and increases the material's reactivitywhen interacting with acidic activators. Additionally, the minor presence of TiO2(1.11%) may improve themechanical properties of ash-based materials.DOI
https://doi.org/10.51301/ejsu.2025.i3.05Тип публикаций
Данный документ располагается в коллекциях
Научные издания SU
Engineering Journal of Satbayev University