Статья

Physico-Chemical Study of the Possibility of Utilization of Coal Ash by Processing as Secondary Raw Materials to Obtain a Composite Cement Clinker

Bekkeldi MuratovDepartment of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanAlexandr KolesnikovDepartment of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanS. ShapalovDepartment of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanSamal SyrlybekkyzyDepartment of Ecology and Geology, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanIrina VolokitinaDepartment of Metallurgy and Mining, Rudny Industrial Institute, Rudny 111500, KazakhstanD.A. ZhunisbekovaDepartment of Higher Mathematics and Physics for Technical Specialties, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanGulchehra TakibayevaDepartment of Higher Mathematics and Physics for Technical Specialties, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanFarida NurbaevaDepartment of Ecology and Geology, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanTaslima AubakirovaDepartment of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Shymkent 160012, KazakhstanLazzat NurshakhanovaDepartment of Petrochemical Engineering, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanAkmaral KoishinaDepartment of Petrochemical Engineering, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanLeila SeidaliyevaDepartment of Ecology and Geology, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanAndrey VolokitinDepartment of Metal Forming, Karaganda State Industrial University, Temirtau 101400, KazakhstanAizhan IzbassarDepartment of Construction Engineering, Sh. Yesenov Caspian University of Technology and Engineering, Aktau 130002, KazakhstanIgor PanarinPolytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, Russia

2023en

ABI

Аннотация

A significant amount of energy waste has accumulated in the world, in particular, large-tonnage fine ash from central heating stations (coal ash), which can negatively affect the natural environment and the health of the population. However, at the same time, due to its chemical composition, this waste can be disposed of by complex processing as a secondary mineral component, thus reducing the anthropogenic load on the natural environment. This article presents a physico-chemical study of coal ash for its further use as a secondary mineral component, in particular, a component of a raw mixture with limestone to produce a composite Portland cement clinker. Coal ash and limestone were subjected to granulometric, chemical, differential thermal, scanning electron microscopy, elemental chemical and X-ray structural analyses, as well as modeling to assess the possibility of optimizing the raw material and mineralogical composition of the composite Portland cement clinker. During the research, the chemical and elemental compositions of the coal ash and limestone were determined and SEM images of the coal ash were obtained; it was found that 68.04% of the coal ash was represented by the fraction with granules <0.16 mm. Using X-ray diffraction analysis, the main limestone minerals were identified, which were represented by calcite and silica. Based on the results of mathematical modeling of the utilization of coal ash from a thermal power plant by processing with limestone, a two-component raw material mixture containing 23.66% fly ash and 76.34% limestone was optimized and the optimal mineralogical composition of the composite Portland cement clinker was determined. Utilization of coal ash by processing as a secondary raw material can be carried out at almost any ash storage facility anywhere in the world, taking into account the chemical composition of the processed ash. It was found that the replacement of natural raw materials with man-made raw materials in the form of coal ash contributed to a reduction in fuel consumption for firing (kg of conventional fuel) by 13.76% and a decrease in the thermal effect of clinker formation by 5.063%.

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Идентификаторы

DOI: 10.3390/jcs7060234

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar