A Review on Environmental Concerns and Technological …
Steel slag from a specific iron and steel industry contains toxic elements like alkalis, heavy metals, and metalloids. These toxic elements get released into the environment …
Modeling the application of steel slag in stabilizing …
Steel slag, on the other hand, increased the values of maxi- mum dry density, uncon ned compressive strength, and California bearing ratio in clayey soil samples.
Chemical, Mineralogical, and Morphological …
Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc …
Carbon steel slag and stainless steel slag for removal of …
The modification of stainless steel slag by FeC13 can generate more pore structures and larger surface areas, and 300 °C treatment produces the best regeneration efficiency. The ΔG values were negative for all of the steel slags, indicating the spontaneous nature of the adsorption process. The solution pH was a critical parameter for the ...
Utilization of steel slag in air pollution and greenhouse gas …
Steel slag, as a kind of solid waste with high calcium oxide content, has the potential to absorb acid gas. Because, steel slag also contains a small amount of …
Utilization of steel slag in air pollution and greenhouse gas …
Steel slag, as a by-product of the steelmaking process, is an industrial waste formed from impurities in the metal raw material with fluxes and furnace linings. Due to the different chemical composition and cooling conditions caused by the appearance of steel slag form, color varies greatly. ... The exothermic nature of the reaction was ...
Bacteria fixing CO2 to enhance the volume stability of ground steel …
The survival of BM in the alkaline environment of steel slag solution is worthy of attention. Fig. 3 depicts the growth characteristics of BM in deionized water and steel slag solution. OD 600 is the optical density of the solution at a wavelength of 600 nm. The larger the OD 600 value, the greater the number of BM. The two curves' trends are similar, indicating …
Influence of Steel Slag on the Mechanical Properties of …
The production of cement (i.e., up to 43.8 million tons per annum) and steel slag (i.e., up to 12 million tons per annum) is responsible for the emission of 19–20% of CO 2 [5,6,7,8]. Consequently, peoples around the globe started working on the application and the utilization of different industrial waste in construction practices.
Effects of surface Fe(III) oxides in a steel slag on the …
Steel slag contains high levels of iron that can serve as a acid [17], [18]. Steel slag has been used in the production of course materials, coarse aggregates [19], [20] and as a fertilizer [21]. Steel slag contains CaO derived from lime and this may be …
Kinetics of steel slag dissolution: from experiments to …
In the authors' opinion, there are two problems associated with the understanding of dissolution kinetics of steel slag, namely, identification of the rate controlling step, and a lack of kinetic models that consider the heterogeneous nature of steel slag.
The Efficiency of Steel Slag and Recycled Concrete …
Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are dumped in landfill. These …
Steel Slag
Steel slag is an industrial byproduct obtained from the steel manufacturing industry. It is produced in large quantities during steel-making operations that use electric arc furnaces. …
THE ESTIMATION OF SLAG PROPERTIES
metal and slag; eg reaction 1 can be expressed by Equation 2 (where M indicates in metal) : 2Al +1.5 SiO2 (slag) = 3Si + Al2O3 (slag) (1) 2Al +1.5Si 4+ = 1.5 Si + 2 Al 3+ (2) These electro-chemical reactions are accompanied by changes in properties. Mass transfer (in Equation 1)
Radioactive Method for the Determination of Slag Mass during
IN open-hearth steel-making, chemical reactions take place between the metal bath and a supernatant slag layer, and any material balance on the process demands an accurate knowledge of the masses ...
Steel slag to improve the high strength of concrete
Steel slag is an industrial by-product of steel industry. It possesses the problem of disposal as waste and is of environmental concern. The results were compared with conventional concrete ...
Analysing the influence of ground granulated blast furnace slag …
This study examines the effect of Ground Granulated Blast Furnace Slag (GGBS) and steel fibers on the flexural behaviour of RC beams under monotonic loading.Various percentages of GGBS were used ...
Steel slag amendment impacts on soil microbial …
In this study, we evaluate the amendment impact of Linz-Donawitz converter (LD) slag, generated from the basic oxygen furnace (BOF) process in steel manufacturing, on soil …
Role of Slag in Converter Steelmaking – IspatGuru
If the slag to steel mass ratio at the end of a converter blow varies within 0.08 to 0.1, the slag to steel volume ratio rises from almost zero in the beginning of the blow to 0.20/0.25 towards the end of the blow. In general, slag is considered to dampen metal ejections (spitting) and dust formation from the converter during the blow.
Because the steel slag has more water absorption than the …
Steel slag posses some cementitious properties, but it is also a porous material, therefore with absorption properties. ... Due to its pozzolonic nature as well as during the crystallizing stage ...
CRITERIA FOR THE USE OF STEEL SLAG AGGREGATES IN …
Beshr H., Almusallam A.A., Maslehuddin M. "Effect of coarse aggregate quality on the mechanical properties of high strength concrete", Construction and Building Materials 17 (2003) 97–103. Article Google Scholar . Shi C., Qian J. "High performance cementing materials from industrial slags - a review", Resources, Conservation and Recycling, 293 (2000), 195–207.
Steel Slag
Steel slag (SS) is a solid waste generated during the conversion of iron into steel in a basic oxygen furnace (BOF) or during the melting of scrap to make steel in an electric arc furnace (EAF). ... They have a rough vesicular nature with many non-interconnected cells, which gives a greater surface area than smoother aggregates of equal volume ...
Development of an electric arc furnace steel slag-based …
The chemical composition of EAF steel slags can vary widely depending on the grade of steel scrap used in the EAF (as an example, galvanized steel will increase zinc concentration in the slag, whereas stainless steel will more likely increase nickel and chromium), as well as the nature and quantities of additives (fluxes and slag-forming agents ...
The Indirect Mineral Carbonation of Electric Arc Furnace Slag
The indirect mineral carbonation of industrial residues is one of the potential technologies for CO 2 sequestration. In this paper, the leaching and carbonation of electric arc furnace (EAF) slag ...
Semi-dry and aqueous carbonation of steel slag: …
Steel slag exhibits significant carbonation activity, attributed to its relatively high CO 2-reactive components, such as dicalcium silicate, tricalcium silicate, portlandite, and free-CaO, making it a prime candidate for CO 2 sequestration [13], [14].Various methods for the mineral carbonation of steel slag have been proposed, including direct dry carbonation, direct …
Quantitative characterization and evaluation of key …
Moreover, the alkaline nature of steel slag, combined with its well-developed pores and rich apparent morphology, provides better bond strength with asphalt than that of natural aggregate. It can be seen that the alkalinity, hydration activity, pore characteristics, and three-dimensional (3D) morphology of steel slag are the key characteristics ...
Utilization possibilities of steel slag as backfill material
The use of slag, which is generated as a by-product in steel production process, as backfill material in coastal structures is of great importance in terms of protecting the nature,...
Microstructure Characteristics and Possible Phase Evolution …
Industrial wastes such as steel slag and coal gangue etc. were chosen as raw materials for preparing ceramic via the conventional solid-state reaction method. With steel slag and coal gangue mixed in various mass ratios, from steel slag to coal gangue at 10% intervals, microstructure and possible phase evolution of the coal gangue-steel slag …
Properties and Environmental Dynamics of Slag
This chapter discusses the chemical and physical properties of slag in its solidified state, trace elements in slag, changes in slag due to weathering and wear, and the potential …
The soundness of steel slag with different free CaO and MgO contents
Steel slag with a 4.96% content of CaO presents bad soundness and leads to the soundness-induced failure of concretes at both high and low water-to-binder (W/B) ratios. When the content of f-CaO is within 2.09%, the steel slag presents satisfactory soundness. The results of the autoclave test show that when the content of MgO is within 7.68% ...
Steel slag as low-cost catalyst for artificial photosynthesis
Photoreduction of CO 2 with sunlight to produce solar fuels, also named artificial photosynthesis, is considered one of the most attractive strategies to face the challenge of …