Slag Evaluation to Reduce Energy Consumption and EAF
Some DRI-EAFs are operating at low basicity (EAF 9, 11, 13, 15 in Table 3), but half of the DRI-EAFs are still operating at high slag volumes and basicity near 2 (EAF 10, 12, 14, 16 in Table 3 ...
Physicochemical and mineralogical properties of stainless steel …
The tests were conducted on two types of slag, namely EAF slag (Electric Arc Furnace) and AOD slag (Argon Oxygen Decarburisation). ... It was reported that magnetic separation or gravity separation methods had been used for recovery of Ni and Cr from stainless steel slag in some commercial processes (Lopez et al., ...
Treatment and characterisation of electric arc furnace (EAF) slag …
The specific gravity of the slag is 3.5, which is marginally lower than the corresponding untreated EAF slag. The slag is porous and is easy to grind. Under identical loading conditions in a laboratory ball mill, the treated slag takes only half the time to attain a fineness of 400 m 2 kg-1 than that of untreated EAF slag. Microstructure
Sustainable recovery of metallic Al and reuse of molten salt …
The experimental data explained that the separation of Al droplets and molten salt were greatly enhanced with the increase of gravity coefficient, and the contents of Al and salt in the residual slag were reduced to 0.29 wt% and 3.39 wt% at G = …
Experimental evaluation of EAF ladle steel slag as a geo-fill …
The specific gravity of B1LF steel slag is comparable to the specific gravity of natural inorganic soils, which is typically in the 2.6–2.9 range. ... Andreas et al. (2005) [53] reported results of standard Proctor compaction tests performed on a ladle slag-EAF steel slag mixture containing 35% EAF steel slag (by weight).
Assessment of Electric Arc Furnace (EAF) Steel …
After that, magnetic separation, flotation, and/or gravity separation can be used to further classify the EAF slag into magnetic minerals, valuable elements, and tailings. Magnetic minerals typically contain Fe that can …
Waste to wealth: Recovery of value-added products from steel slag
This leads to higher removal efficiencies. For example, columns filled with 6–12 mm BOF slag or 5–16 mm EAF slag removed less than 98% of inlet phosphorus whereas columns filled with 20–45 mm BOF slag and 20–40 mm EAF slag removed 56% of inlet phosphorus [228].
Durability of concrete made with EAF slag as aggregate
Electric arc furnace (EAF) slag, a by-product of steelmaking recovered after the oxidizing process, is useful when employed as aggregate in hydraulic concrete and bituminous mixtures. ... Apparent specific gravity (Mg/m 3) 3.35: 3.70: Water absorption (%) ... In fact, the compressive rupture of M-1 showed a non-cohesive separation …
Selective metal cation concentration during the solidification …
Several studies have been dedicated to evaluating the possible applications of stainless steel slag and dust. Gravity separation and magnetic separation methods have been used to recover the Ni and Cr metals or alloys from stainless steel wastes in some commercial processes, but some of the metals present as metal oxides and in the …
Evaluation of asphalt film thickness and heavy metal …
Electric-arc-furnace (EAF) steelmaking uses scrap iron and steel as raw materials. Scrap iron and steel originate from complex sources and may contain heavy metal components which can leach into the environment over time due to wear-and-tear. A by-product of the EAF steelmaking process is oxidizing slag, and approximately 1.2 …
2 Electric Arc Furnace Steelmaking and Slag Formation, …
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 …
A Sustainable Method for Chromium Recovery from …
of EAF slag per 3 tons of liquid stainless steel [] gener4 - ates during the EAF process. On the one hand, the slags need to be stabilized to avoid contamination of ground- ... gravity and magnetic separation [, 89], leaching process [10–12], and …
New EAF Slag Characterization Methodology for Strategic …
EAF slag can be used as blending material for Portland cement, by the hydration of Portland and EAF slag mixtures. ... However, a few studies [1,4,22,23,24,25] were focused on the metals' separation and recovery from steel slags, and several findings are summarized early . In this context, the main objective of this work is to know EAF …
Cold EAF Salg Processing Methods. Fe+FeO separation by …
We are looking for professional companies and experts with reliable and efficient technology for Cold Slag Processing (CSP) to crush, sieve and using magnet separation for separation of Fe metals ...
Electric arc furnace slag and its use in hydraulic concrete
Two types of crushed electric arc furnace slag (EAFS1 and EAFS2) were used in this study, as detailed in [35], supplied by two different steelmakers.Some images of EAFS1 (fresh and after long-term weathering) are shown in Fig. 1.Their global chemical composition and physical properties are detailed in the Table 1 and their grading …
Efficient separation of iron elements from steel slag based …
DOI: 10.1016/j.jmrt.2023.01.186 Corpus ID: 256563836; Efficient separation of iron elements from steel slag based on magnetic separation process @article{Liu2023EfficientSO, title={Efficient separation of iron elements from steel slag based on magnetic separation process}, author={Xin Liu and Da-zhi Wang and Zhi-wei …
Study on Process Mineralogy and Titanium Separation of Ti-Bearing EAF Slag
Panzhihua Steel Plant adopts a new process - "rotary hearth furnace (RHF) direct reduction - electric arc furnace (EAF) deep reduction" - to manufacture iron, and the resultant Ti-bearing slag contains 44.03% titanium dioxide and has higher contents of impurities such as calcium, magnesium and silicon, so it cannot be prepared titanium …
Utilization of Linz–Donawitz slag from steel industry for …
The Linz–Donawitz (LD) slag is an industrial waste generated in Linz–Donawitz process of steel making. It is not gaining importance in construction industry because of its volume instability, and presence of excessive phosphorous and sulphur content. Suitable accelerated ageing and masking of harmful materials can improve the …
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 …
Mechanical, Physico-Chemical and Morphological …
The cement has a specific gravity, standard consistency, and initial setting time were 3.16, 31%, and 35 min, respectively. The fine aggregate used in this investigation has been acquired from a riverbed, which has the advantage of a cubical shape with a smooth surface. ... EAF slag has a bulk density 4.6 percent higher than natural coarse ...
Nickel recovery from electric arc furnace slag by …
During the pyrometallurgical treatment of the nickel-bearing laterite in the plant of G.M.M. S.A. LARCO, slag is produced after treatment in electric-arc furnace (EAF) that contains 0.10 to 0.20 % Ni.
Electric Arc Furnace (EAF) Slag | US EPA
About EAF Slag. EAF slag is a rock-like material generated during the steel-making process. Approximately 130 facilities across the United States generate EAF slag. EAF slag is used as an alternative to rock fragments, both in encapsulated uses (e.g., contained in concrete) and unencapsulated uses (e.g., loose ground cover material).
Treatment and characterisation of electric arc furnace (EAF) …
The specific gravity of the slag is 3.5, which is marginally lower than the corresponding untreated EAF slag. The slag is porous and is easy to grind. Under …
Recycling of EAF Dust Through Source Separation
EAF steelmaking generates EAF dust, and the EAF dust is a listed hazardous solid waste [].There are only three ways to treat the EAF dust allowed by environmental protection authorities: disposal of the dust at landfills for permanent storage, recycling of the dust at zinc recycling facilities for zinc recovery and selling the dust to …
(PDF) New EAF Slag Characterization …
Menad et al. [6] authored an article, entitled "New EAF Slag Characterization Methodology for Strategic Metal Recovery". Generated from electric arc furnace (EAF), this material represents a ...
Physicochemical and mineralogical properties of stainless …
The tests were conducted on two types of slag, namely EAF slag (Electric Arc Furnace) and AOD slag (Argon Oxygen Decarburisation). The samples were …
New EAF Slag Characterization Methodology for …
It can be seen that the d 50 of raw slag was determined at 5.5 mm and, for the fragmented slag, was about 0.3 mm. In addition, the d 90 of raw EAF slag is about 7.6 mm and that of the fragmented slag is …
Mineralogy of Metallurgical Slags
The term "slag" is used for different materials which result from solidification of a melt.Sometimes it refers to pyroclastic rocks [], sometimes to ashes, e.g. from waste incineration, which have undergone sintering due to partial melting [], but mostly for pyrometallurgical residues which result from the reaction of slag-forming agents with …
The Indirect Mineral Carbonation of Electric Arc Furnace Slag …
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 ...