Environmental risk assessment of steel-making slags and …
Request PDF | 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.) | Over the ...
A Review of Circular Economy Prospects for Stainless …
A Review of Circular Economy Prospects for Stainless Steelmaking Slags. Thematic Section: MOLTEN 2021: Slags, Fluxes, and Salts for Environment, …
Enrichment of marine productivity utilizing steelmaking slag …
The steelmaking industry in Taiwan produces around a million tons of basic oxygen furnace (BOF) slag each year (Tsai and Xu 2014).The majority of this slag is used in the paving of roads and in geotechnical engineering (Wojciech et al. 2015; China Steel Corporation (CSC) 2018).In recent years, MPE utilizing artificial reefs made of slag have …
Assessment of Gas-Slag-Metal Interaction During a Converter Steelmaking …
The interaction between gas and liquid metal/slag is the primary determinant of all the complicated phenomena during the converter process [ 1 ]. For instance, the top blown jet can affect the decarburization rate and the total Fe content in the slag at the final stage of the process. Therefore, a systematical description of the interaction ...
Environmental risk assessment of steel-making slags and the …
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 …
The recycling and reuse of steelmaking slags — A review
During the blast furnace process limestone (CaCO 3) flux is added, to collect the waste products produced: silica (SiO 2), phosphorus pentoxide (P 2 O 5), calcium sulfide (CaS), magnesia (MgO) and alumina (Al 2 O 3).This forms blast furnace (BF) slag, which floats on top of the surface of the hot metal (Peters, 1982).The blast furnace is …
1 Introduction | Health Risk Considerations for the Use of
Another slag that is common in steelmaking is a slag that is purposely added to the top of the container used to transport liquid steel (a ladle), and this is termed a ladle slag. Slags formed during reduction of iron ore are also defined by their process name—for example, as the blast furnace is commonly used for high production quantities ...
Recovery of calcium and magnesium bearing phases from …
Large amounts of iron– and steelmaking slag and greenhouse gas are annually produced by the steel industry worldwide. Using Ca/Mg in the slag to capture and store the CO 2 via mineral carbonation is a promising approach to the reduction of waste emissions. Since iron– and steelmaking slags are a mixture of numerous types of …
Environmental Assessment of Recycling (EAoR) for Safe …
also be amended. In addition, the applications of steelmaking slag were necessary to partially extend according to the hazardous characteristics. Keywords: steelmaking slag; recycling; application; waste management; environmental assessment of recycling 1. Introduction The production of global steel has increased from 2 million …
Environmental and Geotechnical Assessment of the Steel …
When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, …
Comparative Life Cycle Assessment (LCA) of Accelerated …
ABSTRACTCarbon capture, utilization, and storage (CCUS) is one of the most prominent emerging technologies for mitigating global climate change. In this study, a comparative evaluation for CO2 fixation by carbonation of steelmaking slag was performed by life cycle assessment (LCA) using Umberto 5.5.4 software, with the Swiss Eco-invent …
Industrial uses of slag. The use and re-use of …
Granulated slag has, in the past, been used for the. manufacture of cement, construction of highway bases and. for soil conditioning 34. Before the introduction of the pre-treatment of hot-metal ...
(PDF) Environmental Assessment of Recycling (EAoR) for
Changes in usage of (a) blast furnace slag and (b) steelmaking slag in the Repu blic of Korea between 2010 and 2019. Table 2 summarizes the applications of recycled slag in diffe rent countries.
Carbonation of steelmaking slag presents an opportunity …
Steelmaking slags (both iron slag and steel slag) are by-products during iron and steelmaking process and have the same properties in the carbonation [30].Table 1 demonstrates that the main chemical components of steel slag are CaO, S i O 2, MgO, A l 2 O 3 and F e 2 O 3 [31].Like many previous report, steelmaking slag is mainly …
CO2 Mineralization and Utilization using Steel Slag for …
Flue Gas CO 2 Mineralization via Accelerated Carbonation. Reaction time (i.e., hydraulic retention time), associated with slurry flow rate and rotating speed, is one of the important design ...
Municipal green waste promotes iron release from steelmaking slag …
Fundamental studies and field experiments were conducted to put the concept into practice. Through the incubation of green algae chlorella with the culturing media containing eluates from steelmaking slag, Takahashi et al. observed enhanced algae growth (Takahashi and Yokoyama, 2016), possibly because of the soluble iron released …
Environmental risk assessment of steel-making slags and …
@article{Gwon2018EnvironmentalRA, title={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.).}, author={Hyo Suk Gwon and Muhammad Israr Khan and Muhammad Ashraful Alam and Suvendu Das and Pil Joo Kim}, …
Health Risk Considerations for the Use of Unencapsulated Steel Slag
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, EAF slag is used in a loose or unencapsulated form as ground cover material for residential landscaping. However, the …
[PDF] Strategies for Promoting Steelmaking Slag …
Strategies for Promoting Steelmaking Slag Resourcezation in Taiwan. Because of the world ever-growing pursuit of economic growth, natural resources have been overly exploited and squandered. Such actions have created a negative effect on the environment and led to resource depletion. These problems subsequently garnered the government …
Environmental risk assessment of steel-making slags and …
Chemical characteristics and environmental risk assessment of steel slags. Four different kinds of slags i.e., Blast furnace slag (BF), Linz-Donawitz converter slag (LD) Electric arc furnace slag (EAF), and refined slag or ladle furnace slag (LF) were obtained from POSCO, Republic of Korea. The slags were air-dried and made into powder form.
steelmaking slag: a safe and valuable …
STEELMAKING SLAG: A SAFE AND VALUABLE PRODUCT November 1998 Prepared by: On behalf of: John L. Wintenborn The Steel Slag Coalition Joseph J. Green Collier, Shannon, Rill & Scott, PPLC 3050 K Street, N.W. Washington, D.C. 20007 (202) 342-8400 NATIONAL SLAG ASSOCIATION
Electric Arc Furnace Steelmaking and Slag Formation, …
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 population centers), and the development of mini and macro steel mills based on metal recycling. Scrap availability and price has made steel …
Carbon capture and storage technology by steel-making …
Ghacham [98] and Baciocchi [99] et al. reported that the calcium conversion rate of EAF slags is much lower than that of other types of steelmaking slag, and the carbonation conversion rate are only 14–20.9 %, which is mainly attributed to the low CaO content of EAF slag. Although LF slag has high CaO content, the carbonation …
Carbonation of steelmaking slag presents an opportunity …
DOI: 10.1016/j.jcou.2021.101738 Corpus ID: 241755579; Carbonation of steelmaking slag presents an opportunity for carbon neutral: A review @article{Chen2021CarbonationOS, title={Carbonation of steelmaking slag presents an opportunity for carbon neutral: A review}, author={Zhao Chen and Zhizhi Cang and Fengmin Yang and Jingwen Zhang …
2 Electric Arc Furnace Steelmaking and Slag Formation, …
Thus, the amount of slag from EAFs that was sold is approximately 6.2 million tons in 2022 (assuming that 72 percent of the steelmaking slag was from EAF). The amount of slag sold annually will vary with the level of demand for the product as there is significant slag inventory that has been built up over the years.
Oxygen Steelmaking Processes
and flux additions to form a slag Sampling–chemical testing 4–15 Steel at 1650°C (3000°F), chemistry and temperature Tapping 4–8 Steel is poured from furnace into a ladle, typical size = 250 tons Pouring slag offat furnace 3–9 Most slag is removed from furnace, in some shops slag is used to coat furnace walls Steelmaking and Refining ...
Comprehensive utilization of steel slag: A review
1. Introduction. Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, …
Basic Oxygen Steelmaking Slag: Formation, Reaction, …
Basic oxygen steelmaking (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 of high-quality crude steel, although its behavior inside the BOS vessel (formation and reaction with metal droplets and gas) is still not clear and its recycling ...
Development of large steelmaking slag blocks using a new …
Porous slag blocks (1 m3) 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/cm3, 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 …
BOF Steel Slag: Critical Assessment and Integrated Approach …
14 Citations. Explore all metrics. Abstract. During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical …