The predominant way of making steel in the United Sates is by using an electric arc furnace (EAF) to melt scrap steel, which results in the formation of a rock-like material called slag. Among its various applications, …

To enhance the understanding about the utilization of steel slags as a cementitious material, we comparatively studied the chemical, mineralogical and morphological properties of two types of steel slag; basic-oxygen-furnace carbon slag (BOF C) and electric-arc-furnace stainless steel slag (EAF S). Moreover, we studied the standard consistency, setting …

Chromium was successfully separated from synthesized stainless steel slag (CaO–SiO2–MgO–Cr2O3) through the addition of waste silicon powder and CaF2. Waste silicon powder shows a promising and environmentally friendly reductant, compared to carbon, achieving the transformation of chromium from stainless steel slag to dispersed fine alloy particles, while …

Slags coming from stainless steel (SS) and ferrochromium (FeCr) production generally contain between 1 and 10% Cr, mostly present in entrapped metallic particles (Fe–Cr alloys) and in spinel structures. To recover Cr from these slags, magnetic and gravity separation techniques were tested for up-concentrating Cr in a fraction for further processing. In case of …

The effective utilization of stainless steel slag on a large scale has posed a persistent challenge. To address this problem, this study used the orthogonal test method to investigate the optimisation of the ratio of stainless steel slag preparation cementitious materials while exploring the curing mechanism of metallurgical solid waste materials and its stability …

Stainless Steel Slag Characterization. The elemental composition of each type of analyzed slag is reported in Table 1.Results proved to be in good agreement with data reported for these specific types of residues in prior studies [6, 9, 41, 42].The elemental content of the EAF slag was overall similar to the average composition of the mixture for most elements (i.e.: Al, …

The low activity of stainless steel slag (SSS), primarily attributed to its high γ-C2S and low C3S content, impedes its effective utilisation. A thermochemical high-temperature reconstruction method using lime and bauxite as tempering agents to regulate the mineral phase was investigated in this work. Through an array of tests and analytical techniques, including …

In the current study, electric arc furnace stainless steel slag (EAFSS) as a potential precursor in the production of alkali activated materials (AAMs) is investigated, along and …

• Stainless steel slag provides various micronutrients for essential crop management. • Soluble silica in stainless steel slag provides benefi cial applications in specifi c crops. • The Turf Grass Industry has proven that stainless steel slag provides very effective benefi ts. • Stainless steel slag is licensed for Agricultural

Chromium plays a vital role in stainless steel due to its ability to improve the corrosion resistance of the latter. However, the release of chromium from stainless steel slag (SSS) during SSS stockpiling causes detrimental environmental issues. To prevent chromium pollution, the effects of iron oxide on crystallization behavior and spatial distribution of spinel …

The slag used in the experiments was obtained from the Argon Oxygen Decarburization (AOD) converter units at a stainless-steel production plant. Upon receipt, the hot slag was allowed to cool naturally in a dry environment to prevent aging reactions such as hydration, oxidation, and carbonation.

AbstractThis study aimed to study the effects of different carbonation–hydration processes and carbonation degrees on the mechanical properties and leaching behavior of heavy metals in stainless steel (SS) slag paste. SS slag powders were carbonated at ...

The volume of slags generated from the steel industry is a source of possible resources which is constantly increasing. Specifically, in the production of stainless steel, specific and singular slags with unique …

A new synergistic treatment of stainless steel slag and low zinc content electric arc furnace (EAF) dusts is proposed to immobilize harmful chromium in stainless steel slag. The effects of ZnFe2O4 addition on the mineralogic phase and chromium leachability of CaO-SiO2-MgO-Al2O3-Cr2O3 synthetic slag were investigated to explore the feasibility of this method. …

Carbon dioxide sequestration using steel slag—modeling and experimental investigation. Smitha Gopinath, Anurag Mehra, in Carbon Dioxide Sequestration in Cementitious Construction Materials, 2018. 4.1 Introduction. Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal impurities in the iron combine …

Slag practices and conditions that are optimal for stainless steel quality and good refractory performance are defined. Phase equilibria and computer modelling are used to simulate and predict refractory–slag and slag–metal interactions. The slag principles and requirements for ing in the electric arc furnace are discussed.

This slag is referred to as EAF(L) slag, as it is the ladle slag generated from the refining of the steel from the electric-arc furnace. Edward C. Levy Co. provided representative samples of EAF(L) slag consisting of particles smaller than 9.5 mm.

Stainless steel slag (SS slag) containing a high amount of chromium (2–8 wt%) is a significant by-product of stainless steel production process [1,2,3].Approximately one ton of SS slag forms when manufacturing three tons of stainless steel [4, 5].Plenty of SS slags are discharged to the environment every year, leading to a waste of chromium resource.

Stainless steel slag (SSS), for instance, a residue produced during the stainless steel making process, has the potential to be used in alternative cement production. However, since chromium is an essential constituent of stainless steel, a fraction of it appears also in the SSS, together with other heavy metals, posing environmental and health ...

Per ton of stainless steel slag, as a kind of solid waste produced during the production of stainless steel, were produced by three tons of stainless steel approximately 10 to which the human body ...

Stainless steel pickling sludge (SSPS) is classified as hazardous solid waste, while Argon Oxygen Decarburization (AOD) slag is challenging to utilize due to the leaching toxicity of Cr. This study introduces a novel in-line co-processing technique for AOD slag and SSPS, parallel to the steelmaking process, aimed at metal recovery, sulfur fixation, and slag detoxification: …

Stainless steel pickling sludge (SSPS) is classified as hazardous solid waste, while Argon Oxygen Decarburization (AOD) slag is challenging to utilize due to the leaching toxicity of Cr. This study introduces a novel in-line …

For example, in stainless steel welding, rising of the slag from the inside of the melt pool to the outside surface is mainly driven by the Marangoni flows due to differences in surface tension ...

Wu et al. (2016) synthesized and prepared stainless steel slag systems under different basicity conditions by using reagent powder. The melting crystallization experiment at 1400 °C was carried out in N 2 protective atmosphere. It was found that the slag with high basicity (1.25 or 1.5) was easier to form spinel phase, and the slag with low basicity (1.0) was easier to …

The use of stainless steel slag waste (Sw) in cement manufacturing involves analysing the presence of chromium VI because there this toxic element is limited according to the current Spanish legislation for the manufacture of cement. Chromium content was evaluated according to UNE-EN 196-10, and it was shown that it is not detrimental to the ...

The maximum adsorption of arsenic on carbon steel slag, stainless steel slag and Fe-modified stainless steel slag was 12.20, 3.17 and 12.82 mg g−1 at 25 °C, respectively. 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 ...

In this study, a method to selectively separate Cr from industrial electric arc furnace stainless steel slags was proposed. Phase equilibrium experiments were performed to obtain a …

As molten stainless steel slag containing dicalcium silicate (C2S) cools it can undergo several phase transitions. The final transformation from the beta-polymorph to gamma-C2S is accompanied by a volume change that causes the slag to self-pulverise or 'dust'. As a consequence of this the fine grained portion of the slag contains more of this ...

is the lack of slag chemistry and viscosity control. In many cases the slag tended to be too stiff to sustain an adequate . The following discussion will attempt to provide a better understanding on the key factors that control slag ing in stainless steel making. There are basically two requirements for slag ing (C-Steel and ...

An example of slag chemistries during stainless steel production from Holappa et al. (2021) is given in Table 2-3 where significant quantities of chromium oxide are found in the EAF slag; however, due to the high reactivity …