Capturing CO 2 by steel slag (SS) via mineralization is regarded to be an excellent choice due to the high basicity of the slag. In this paper, recent research on the steel slag-based carbon capture and storage (SS-CCS) by …
Reconstruction of high temperature melting compound steel slag-fly ash can be effectively digest f-CaO in steel slag. The experimental result shows that the f-CaO contents in modified slag is ...
Silica fume is a by-product of the production of silicon and ferrosilicon alloys, while fly ash is a by-product of coal combustion in thermal power plants, and steel slag is a by-product of the steel manufacturing process. Fly ash is used in the production of cement, bricks, paving materials, floor tiles, and wall panels, and also in ...
Modifying the admixture of alkali-activated cementitious materials using components such as fly ash and fine sand may reduce CO2 emissions and conserve natural resources and energy. This study adopted strength testing, scanning electron microscopy, and mercury intrusion porosimetry to investigate the influence of different admixtures on the …
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Abstract The metallurgical processes in production of iron and steel from ores produce slags (blast furnace slag and basic oxygen furnace slag), which is usually dumped as solid waste by various steel plants around the world. The present study assessed and estimated the impact of slag dump piling up for the last 60 years on the hydrogeological environment in …
Coarse ash particles, referred to as bottom ash or slag, fall to the bottom of the combustion chamber, while the lighter fine ash particles, termed fly ash, remain suspended in the flue gas. Prior to exhausting the flue gas, fly ash is removed by particulate emission control devices, such as electrostatic precipitators or filter fabric ...
This study presents the development of eco-friendly cementitious materials for soil stabilization, based on alkaline multi-industrial waste (AMIW), using steel slag (SS), blast furnace slag …
Fly ash and waste lime are solid wastes generated in pulp and paper mills.Due to high CaO contents, these secondary lime materials can be potentially utilized in the steelmaking process to partially replace primary lime. In this study, fly ash and waste lime from Swedish pulp and paper mills were made into briquettes and for the first time utilized as slag formers to …
of 241,885 tonnes of Granulated slag. Bhilai steel plant reported production of 1,350,817 tonnes of granulated slag. KIC Metaliks, West Bengal reported ... of the final slag. Process can be described as an accelerated ageing process that reduces the free ... lakh brick products/day by utilising fly ash and slag generated from integrated steel ...
Waste recycling and reuse is an important component of sustainability. Extensive research is being conducted to address this issue by incorporating industrial by-product such as steel slag, copper slag, fly ash, ferro-chrome slag, and so on into the construction industry. Steel slag, which is mostly calcium carbonate, is created as a by-product of the steel …
Coal fly ash is primarily produced in power plants as a byproduct of coal combustion. As shown in Fig. 1, the by-products of coal ash combustion include fly and bottom ash, boiler slag, and flue gas. FA particles, the main by-product, are fine powdery particles, and heterogeneous. ... This process forms solid glassy, and hollow spheres with a ...
The treatments of fly ash added at 20-40 g•kg-1 and steel slag at 3-6 g•kg-1 had the pH values within 5.5-7.0, and the Superscript textneutral and weakly acidic soil environment was suitable ...
Fly ash has been widely used as a cement substitute to improve the sustainability of concrete. Although the advantages of fly ash have been extensively documented, there is a …
This study explores the utilization of steel slag and fly ash in road construction to address the increasing demand for pavement materials and the scarcity of natural aggregates. For this purpose, steel slag–fly ash composite is stabilized with lime and ground granulated blast furnace slag (GGBS) to assess their utility as a subbase and base material in flexible …
In this study, PMs were prepared with steel slag and fly ash by sintering via forming certain ceramic crystalline phases, then a series of composites (pFA, pSS, DSWM, …
Understanding Slag and Fly Ash. Before we compare slag vs fly ash, let's first understand what they are. Slag is a byproduct that results from the smelting process of various ores, such as iron, copper, and lead. When these ores are heated to extract the desired metal, slag is formed as molten, which is later cooled and solidified.
Recently, to reduce the cost of fabricating PCC towards its applications in engineering, some researchers have investigated the industrial solid waste (ISW) based PM to encapsulate molten salt, such as industrial slag, fly ash, tailings, and red mud [30], which can also improve resource utilization and reduce the environmental pollution of ISW.. Argyrios et …
This research demonstrates the effect of curing conditions and carbonization enhancement on mechanical properties of fly ash (FA) - desulfurization gypsum (FGD) - steel slag (SS) gelation blocks.
Coarse ash particles, also known as bottom ash or slag, fall to the bottom of the combustion chamber, while the lighter fine ash particles, termed fly ash, remain suspended in the flue gas. ... Widely used as a raw material in the manufacturing process of fly ash bricks and even cement making, fly ash has become an innovative product with a ...
It is known that cement production, including CaCO 3 calcination and clinker production, is associated with high energy consumption and the emission of a considerable amount of greenhouse gas. The amount of CO 2 released in the production of cement is about one ton for each ton of cement clinker. Almost 8% of the global emission of CO 2 is produced …
A new CO 2 curing system was established where 99.9% purified CO 2 was purchased from a local chemical plant, and over 90% of the solid raw materials were obtained from local industrial solid waste, including steel slag and fly ash. Compared to the traditional steam curing process, this system was operated at 23 °C under 0.8 MPa and does not ...
Steel slag was collected from the ArcelorMittal Nippon Steel, Hazira, Surat, Gujarat. Fly ash was procured from the NTPC plant located at Ramagundam, Telangana. GGBS and lime were purchased from local suppliers. In the comparative analysis of steel slag and y ash, both materials exhibit a grey coloration, indicative of their industrial origin.
• The corrosion behavior of geopolymer mortar prepared with different types of alumina silica-rich binders such as fly ash [24,138], metakaolin [24,139], slag [79], metakaolin and slag [140 ...
slag piles at about 129 processing plants (including some iron and steel plants with more than one slag-processing ... reduce the demand for fly ash as a raw material in clinker manufacture, and air-cooled and steel slags could be used as substitute raw materials. Demand for GGBFS is likely to increase because its use in cement yields a superior
The mineralogy and microstructural alterations in fly ash (FA) and mixtures of steel slag–fly ash stabilized with lime and ground granulated blast furnace slag (GGBS) were evaluated using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques.
Cement production is an energy-intensive process and the greenhouse gas emissions are hard to cut. ... of concrete include using fly ash (a by-product from burning coal in power plants) or slag (a ...
High-alumina fly ash microbeads and steel slag were used as main raw materials to synthesize feldspar porous ceramics via high-temperature solid phase sintering by adding pulverized coal as a pore-forming agent. The effects of the steel slag and pore-forming agent on the apparent porosity and flexural strength of porous ceramics were investigated. The phase …
The specific type of fly ash employed in the batching plants is classified as Class F fly ash according to ASTM C618. ... The grinding process consists of 90% clinker, 5% gypsum, and 5% mineral ...
The solution pH has a distinct impact on the treatment of AMD by steel slag. One objective to remediate AMD is to increase the pH level from acidic to neutral or basic. Researchers have used various waste materials to …
Mineral process wastes, such as metallurgical slags nowadays, are of significant metals and materials resources in the circular economy. The usability of iron-making slag is well established; however, steel slag still needs to be utilized due to various physicochemical constraints. In this context, we have reviewed the global steel slag generation, processing, …
Fly ash and slag addition improves transport properties of concrete after exposure to high temperatures. ... Biomass-fly ash and biomass-bottom ash obtained at the cogeneration plant were used in the dry-cast concrete composition. ... After the grinding process, ash grains had a more regular structure and less open pores, ...
In this study, fly ash (FA), steel slag (SS), magnesium oxide (MgO), and magnesium sulfate (MgSO 4) were used as raw materials to prepare a new type of solid waste-based concrete in the laboratory via a pressure ing process (PFP). Pressure ing was performed to balance the force of the bubbles and improve the uniformity of the pores.
This study investigated the potential for incorporating fly ash and steel slag as partial replacements for cement and fine aggregate respectively to achieve an alternate M20 …
The researchers also concluded that the slag binder is dominant in the fly ash/slag mixture at room temperature alkaline activation. In a study, Lloyd et al. [9] showed the microanalysis of calcium in geopolymer concrete with fly ash-slag binder and concluded that calcium (slag content) is the main factor in early strength. The slag additive in ...
old slag piles at about 124 processing plants (including some iron and steel plants with more than one slag- ... reduce the demand for fly ash as a raw material in clinker manufacture, and air-cooled and steel slags are used as substitute raw materials. Demand for GGBFS is likely to increase because its use in cement yields a beneficial
1 Characterisation of Elcogas fly ash and slag Table 1 gives the chemical analysis of the ELCOGAS IGCC slag and fly ash. The high content of glass former oxides (>80% SiO 2 + Al 2O 3) and low level of modifying or fluxing oxides in its composition are the main reason for the high viscosity of the melted fly ash and slag.
Fly ash is a by-product obtained from the burning of pulverized coal during electricity generation Thermal power plants. Fly ash is a pozzolan containing aluminous and siliceous material which forms cement in the presence of …
H.R. Guzmán-Carrillo, J.M. Pérez, M. Romero, Coal fly ash and steel slag valorisation throughout a vitrification process. International Journal of Environmental Science and Technology 15 (2018) 1757-1766; doi: 10.1007/s13762-017-1542-5 1 Coal fly ash and steel slag valorisation throughout a vitrification process.
The aim of this research was to evaluate the feasibility of using the vitrification process as an alternative solution to the disposal of a coal fly ash and metallurgical slags in landfills. The starting wastes were characterised in terms of chemical, granulometric, mineralogical, and microstructural analysis. A selected batch composition composed by 58.5% …