The deposit volume of steel slag in China exceeds 400 million tons, leading to the occupation of a large area of land and serious environment pollution. However, the current utilization rate of steel slag in China is only about 21%, which is far behind that of...
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In general, several steel slags have beneficial properties such as good strength, durability, and latent pozzolanic (cementitious) properties that make them attractive and potentially suitable for engineering applications, such as infrastructure construction, soil stabilization, neutralizer, as …
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Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment. In this paper, the process of steel and steel slag production, physical and chemical properties, and potential options of slag recycling were reviewed. Since steel …
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The slag samples taken from landfill, which originated from different metallurgical processes, have been characterized in this study. The slags were categorized as electric arc furnace (EAF) slag, argon oxygen decarburization/metal refining process slag and vacuum oxygen decarburization slag based on chromium content and basicity. …
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Industrial experiments on the hydrometallurgical recovery of heavy metals were carried out to identify ways to prevent heavy metal leaching from stainless steel tail slag and provide a scientific basis for producing steel slag fertilizers. The results showed that the comprehensive recovery percentages for metals could reach up to 86% to 95% …
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Learn how stainless steels are produced, used, recycled and their environmental impacts. Compare stainless steels with other metals and materials in terms of energy, …
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The steel slag, ladle slag, and stainless steel slag (chemical characterization in Tables 1 and 2) applied as soil acidity correctives, at the dose necessary to raise the initial soil saturation to 70%, did not change the soil metals content evaluated at 12 and 23 months after the application of residues, and the Pb content decreased with …
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An example of the latter is the magnetic extraction of metal globules from BOS slag and their addition to the blast furnace feed, although the amount of phosphorus in the adhering silicate slag has to be monitored closely. ... Above: A video of a 'falling' stainless steel slag. In the second half of that century a belief arose in Britain, but ...
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Type of Equipment: Braner slitter 60″ wide Materials Processed: HRP&O, cold rolled, coated, carbon steel, stainless steel and aluminum Maximum Coil Weight: 50,000# Maximum Width: 60″ Material Thickness:.011″ to .187″ Tolerances: Slit width tolerances as close as +/- .005 Features: Tight tolerance slitting Type of Equipment: ProEco 60" cut-to …
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Commonly used alkali activation precursors such as blast furnace slag and fly ash will soon become less available due to resource competition, and may cease to be produced in certain regions. This limitation in future supply is a main driving force for the investigation of alternative precursor sources, such as non-blast furnace slags and non …
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Glass-ceramics have been prepared by using stainless steel slag, fly ash and coal fly ash that were fig-obtained from industrial solid waste. The crystallization behavior and mechanical characterization of the glass-ceramics with different (CaO + MgO)/(SiO2 + Al2O3) content ratios were studied. While the basicity decreases from 1.2 …
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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.
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In China, BOF slag accounts for about 70% of the annual steel slag production (Cheng and Yang, 2010).In the BOF process (Fig. 1), minor steel scrap and a large amount of molten iron from ironmaking as well as fluxes (lime/dolomite) are added into the furnace, and a 99% pure oxygen flow is applied at supersonic speed through a lance …
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This study investigated the effects of the SiO 2 /Al 2 O 3 mass ratio on the glass stability, crystallization and heavy metal immobilization of glass ceramics derived from stainless steel slag (SSS). When the SiO 2 /Al 2 O 3 mass ratio decreased from 11.2 to 4.2, the glass stability and the depolymerization degree of the parent glass increased …
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Unlike iron slag and steel slag, the study on metal recovery and utilization of stainless steel slag is just in its infancy (Shen and Forssberg, 2002, Kortbaoui et al., 1993). 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 ...
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simulate and predict refractory-slag and slag-metal interactions. The slag principles and requirements for ing in the EAF are discussed. Aspects of the EAF slags will include the ... slag. With stainless steel slags, the Cr-O buffer occurs at a much lower oxygen potential than the Fe-O buffer, and Cr will be preferentially oxidized compared ...
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The experiments involving ladle slag (60 g) and Si-killed STS316L (600 g) were conducted using a high-frequency induction furnace equipped with a magnisa crucible, as depicted in Fig. 1.After reaching the pre-set temperature of 1873 K, the furnace introduced pure silicon, acting as a deoxidizer, into the molten steel under an inert …
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Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties.
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The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a ...
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According to the statistics of the World Steel Association, the global crude steel output reached 1.864 billion tons in 2020, and the proportion of China's crude steel output increased from 53.3% in 2019 …
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Find out the revenue of the top two steel companies in Mexico in 2019, Ternium México and Grupo Villacero. Statista provides industry-specific and technical data on metals and electronics.
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Outokumpu Mexinox produces coil and strip, sheets, circles and plate materials at its stainless steel finishing mill in San Luis Potosí, Mexico. There, Mexinox operates three …
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DOI: 10.1016/j.jnoncrysol.2022.121770 Corpus ID: 250204163; Effect of SiO2/Al2O3 Ratio on the Crystallization and Heavy Metal Immobilization of Glass Ceramics Derived from Stainless Steel Slag
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Steel slags have a chemical composition close to that of the Portland cement clinker, mainly constituted by calcium-silicates and calcium-ferrites, which makes this industrial waste potentially usable as a raw material for cement and concrete production [91].The presence of steel slag in the clinker manufacturing process reduces the …
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Alkali activation may also provide a fundamental route for the immobilisation of heavy metal-containing wastes originating from metallurgical processes [9, 10], including stainless steel production. Stainless steel slags are generated in considerable volumes, up to about 300–400 kg of slags for each tonne of stainless steel produced [11, 12 ...
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The precursors were MSWI FA from Dalian, China and converter steel slag and their specific surface areas were 671 m 2 /kg and 465 m 2 /kg, respectively. Table 1 presented the chemical compositions of precursors. It can be found that there was 34.25 wt% CaO in the MSWI FA mainly due to the addition of lime in the flue gas cleaning …
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On an average stainless steel production uses 66% nickel [126]. Some of the nickel used as an additive ends up in SS. Nickel recovery from SS has been studied with magnetic separation. During this process, both hand-magnet and dry high-intensity magnetic separation is used. ... Steel Slag contains valuable metals like iron, nickel, …
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CHEMISTRY, MINERALOGY AND MORPHOLOGY OF STEEL SLAG AND STAINLESS STEEL SLAG: A COMPARATIVE STUDY 1SALY FATHY, 1,2,3GUO LIPING, 1MARUI, 4GU CHUNPING, 1,2,3SUN WEI 1 School of Material Science and Engineering, Southeast University, Nanjing 211189, China; 2 Collaborative Innovation Center for Advanced Civil …
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AOD slag is a by-product of the secondary refining process of stainless steel using argon-oxygen decarburization process. After natural cooling, AOD slag generally exists as a fine powder with a light gray color, its main chemical components include CaO, SiO 2, and MgO, with mass fractions of 57.72%, 31.69%, and 6.68% [], …
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The influence of slag fertilizer on the soil microbiome are diverse and the possible mechanisms of slag-microbes interactions can be as follows: (1) slag fertilizer supplies nutrients not only to the plant but also to soil microorganisms; (2) slag fertilizer modifies soil microbial habitats by improving soil properties (e.g., increasing soil pH ...
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Hence, Cr-bearing stainless steel slag (SSS) is rarely employed in the process of SS-CCS if the Cr exists in unstable phases. The authors of this paper studied the effects of chemical composition and cooling conditions on the crystallization behavior of stainless steel slag (Cao et al., 2018; Zhao et al., 2018a,b).
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