A comprehensive study of the potential human health risks associated with the environmental applications (e.g., fill, roadbase, landscaping) of iron- and steel-making …
Studies using iron- and steelmaking slag as filtration media have shown that the slag had good performance in various types of wastewater treatment and …
Risk Assessment Questionnaires, or Third-Party Risk Assessment Questionnaires, are standardized questions designed to gather information about potential risks associated with a specific entity, such as a vendor, partner, or even a new employee. These questionnaires usually involve giving scores to questions about how likely and …
Electric arc furnace (EAF) steelmaking slags that had undergone magnetic separation were obtained from a local steelmaking plant, and the major chemical composition of the slag is shown in Table 1 ...
Five iron- and steel-making slags were characterized geochemically, and the leachability of their elemental constituents was assessed. The toxicity of slag leachate to microalgae (Chlorella sp.), …
Although the total CO 2 sequestration capacity of steelmaking slags is limited compared to primary minerals, the use of slag could be beneficial for steel industries where both slag and a large quantity of CO 2 are produced. Slag is a non-metallic by-product from iron and steel production which consists in various combinations of calcium ...
1. Introduction. Steel–slag reactions are of great importance in steelmaking. Many secondary steelmaking processes focus on these reactions. Currently, desulfurization, deoxidation and inclusion removal are mostly performed during refining in ladle furnace (LF) [1].The extent to which these reactions proceed, and approach …
The basic oxygen steelmaking process is based on the CaO-FeO-SiO2 ternary slag system, characterized by a high melting point and low lime dissolution rate, often becoming one of the key factors limiting the efficiency of the converter. The bulk solid waste red mud, produced by the Bayer alumina process and rich in Fe2O3/Al2O3/Na2O, …
The growth of electric arc furnace (EAF) steelmaking in North America has occurred mainly in the past 40 years due to low electricity prices, an abundance of steel scrap (especially near large …
Our preliminary laboratory study revealed that compared to blast furnace slag, electric arc furnace slag and ladle furnace slag, the Linz-Donawitz converter (LD) slag markedly decreased CH 4 production rate and increased microbial activity.
Ex-situ CO 2 Capture by Carbonation of Steelmaking Slag Coupled with Metalworking Wastewater in a Rotating Packed Bed Shu-Yuan Pan, Pen-Chi Chiang, Yi-Hung Chen, Chung-Sung Tan, and E-E ... Determined by TGA measurement of fresh BOF slag as shown in Figure S3 (a). Title: Microsoft Word - 1311609_File000002_19025445.docx
Refining reactions in steelmaking primarily involve oxidation of impurity element(s). The oxidation potential of the slag and the activity of oxygen in the metal (hO) are the major factors controlling these chemical reactions. In turn, the oxidation potential of the slag is influenced strongly by the equilibrium distribution of oxygen between ferrous …
1 Introduction. The basic oxygen steelmaking (BOS) process produced over 70% of the global crude steel in 2018, [] generating 100 to 150 kg of slag ("BOS slag") for every tonne of crude steel produced. BOS slag, a product of hot metal element (e.g., Si, Mn, Fe, P) oxidation and flux (e.g., lime, dolomite) dissolution, plays a critical role in the production …
sequestration using steelmaking slag is significant for reduc-tion of a large amount of CO 2 emission in steel industry. Hujigen et al.1) have studied the aqueous mineral carbon-ation with steelmaking slag and found that the carbonation reaction occurs in two steps. The first step is Ca leaching from steelmaking slag particles into the solution ...
Steelmaking slag is usually composed of CaO, MgO, Al 2 O 3, SiO 2, and other basic oxides. The high content of basic oxides indicates that steelmaking slag possesses a high alkalinity and a high total theoretical CO 2 sequestration capacity, which has been evaluated at approximately 0.25 kg CO 2 /1 kg slag based on the total calcium content .
Steel slag, a molten liquid melt of silicates and oxides, is a normal occurrence during the steel-making process, but it is also an expensive and detrimental consequence. Slag is created by the separation of the molten steel from impurities inherent in iron ore and scrap metal. Slag impurities degrade steel.
For the EAF steelmaking process the composition, intended function, and quantity of slag depend upon which type of steel …
Nonmetallic oxide inclusions of Al 2 O 3, Al 2 TiO 5, and CaO · 2Al 2 O 3 (CA2) types are responsible for clogging of ceramic nozzles during liquid steel processing. The dissolution of these inclusions in steelmaking slags alleviates the clogging phenomenon. The in situ dissolution behavior a single oxide particle is studied in a …
The objectives of our study were (i) to evaluate the environmental risk assessment of steel slags, and (ii) to investigate the effects of steel …
Since steel making slag contains high concentrations of both Si and Fe, the soil solution chemistry following slag amendment was clearly not known. ... [17]. So it deemed necessary to evaluate the environmental risk assessment before implementing the slag as soil amendment, which was not conducted in earlier researches. The objectives …
Steelmaking slag is a major byproduct generated in steelmaking industry. In 2019, the global output of steel-making slag is estimated to be at least 190 million tons.7) Treatment of such a huge amount of solid waste is one of the challenges for the sustainable development of the industry. Steelmaking slag is normally reused in road construction
The risk level of ultrafine particles was analyzed using the Stoffenmanager-Nano model. Results: The total NC, total MC, and SAC increased significantly relative to background concentrations after slag releasing started and decreased gradually after the activity stopped. The three highest total concentrations during slag releasing were 3-10 ...
Porous slag blocks (1 m 3) were produced by carbonation of steelmaking slag over a period of 12 days.The compressive strength and bulk density of the blocks were 18·4 ± 3·3 MPa and 2·4 g/cm 3, respectively.To make a large block, the optimum amount of water and bulk density of the compact were 5·3–6·3 mass% and 2·30–2·37 g/cm 3, …
Mineralogical phases of steelmaking slags have significant influences on the carbonation of the slags. In this paper, the effects of temperature and reaction time on the conversion of calcium-related phases and the carbonation degree of a slag sample were studied. The experimental conditions were a liquid-to-solid ratio of 20 mL/g, a carbon dioxide flow rate …
Steel-making slag can effectively detoxify low arsenic-bearing wastewater, but its low removal rate, low adsorption capacity, and high arsenic concentration limit its large-scale application.
Steel slag is a major waste product of the steelmaking process. Owing to its chemical composition, it can be reused as a raw material in steel mills and a substitute for aggregates in engineering. In …
Hara et al.11) reported that surface active componentsin slags ~ 12, 7(~~ ~';:~ SLAG ~~ (~~ c:~ ~cc) -O O_ ~ ~ ~ c:~_ 4 A schematic MOLTENSTEEL c~' representation of chemical reactions taking place during slag ing practice in EAF (numbers are referred to chemical reactions in the text), 1058 (~ C~) -O-O35 40 Feo) of stability MnO)-Si02 ...
Environmental risk assessment of steel-making slags and the potential use of LD slag in mitigating methane emissions and the grain arsenic level in rice (Oryza sativa L ... [14,29,30]. Since steel making slag contains high concentrations of both Si and Fe, the soil solution chemistry following slag amendment was clearly not known. And the ...
PMID: 15093340. DOI: 10.1016/s0269-7491 (97)00107-3. Abstract. The noxious potential of metallurgical tailings from the Ag/Pb/Zn/Cu mining district of Sta. María de la Paz …
DOI: 10.1016/j.jhazmat.2018.04.023 Corpus ID: 4977165; Environmental risk assessment of steel-making slags and the potential use of LD slag in mitigating methane emissions and the grain arsenic level in rice (Oryza sativa L.).
Steel making is a sophisticated process that turns iron ore into steel, involving methods like the Blast Furnace and Electric Arc Furnace to produce various grades of steel. The industry emphasizes …
The state of Wisconsin has a statute indicating that "no person may use unencapsulated slag on private property within 100 feet of a residential dwelling or a building intended to be used in whole or in part as a school …
Some variables that influence the slag splashing phenomenon in an oxygen steelmaking converter are numerically analyzed in this work. The effect of lance height, jet velocity, jet exit angle and ...
