In order to address the issue of magnetic agglomeration leading to poor magnetic separation efficiency and low activity enhancement, resulting in limited utilization of steel slag …
The main components of EAF slag are Fe x O, Fe, CaO, SiO 2, MgO, and MnO.The EAF slag contains more iron, but it is mainly dominated by RO phase, which is difficult to be recovered by magnetic separation, resulting in low utilization of iron in slag (Liu et al., 2023, Zhang et al., 2019).The traditional view that EAF slag and converter slag are similar in nature, …
After BOF slag was oxidized at 1300 ℃ for 240 min and cooled in the furnace (1 ℃/min), the grade of magnetic slag obtained by magnetic separation had a grade of 40.26%, a recovery of 70.95% ...
The combination of Low and High Intensity Magnetic Separation (LIMS and HIMS) of ground LD slag at 63 μm in wet process may recover ferromagnetic particles (iron oxides) at LIMS and paramagnetic ...
The total iron (TFe) refers to the iron content in the obtained Magnetization-roasting reduction iron, and the Fe recovery is the ratio of iron content in Magnetization-roasting reduction iron to that in CSS (CSS: coke mass percentage is 100:10, the roasting time is 60 min, the magnetic field intensity is 0.15 T, and the grinding fineness is ...
The strength of Earth's magnetic field in 2010 (left) and 1000BC (right). Courtesy of Christopher Davies. All of these options suggest that behavior of the liquid iron at the top of Earth's core ...
The iron grade in the magnetic products reaches 21.81%, which is 6.88% higher than that of the original steel slag, while the iron grade in non-magnetic products decreases to 11.93%, representing ...
PDF | nFe 3 O 4 was prepared from waste iron slag and loaded onto air stone (named magnetic air stone or MAS in the following text). ... saturation magnetic induction intensity of MAS had 20 emU/g ...
Wang et al. (2017) investigated the effects of magnetic fields of different intensities (0, 5, 10, 15, 20, and 25 mT) on the activity of anammox bacteria (AOB) through short-term batch experiments, which found that magnetic intensity at 5 mT had a significant effect on AOB, and proved that a weak magnetic field is a simple and convenient method ...
Constraints from Iron Age copper slag Ron Shaar a,⁎, Erez Ben-Yosef b, Hagai Ron a, Lisa Tauxe c, Amotz Agnon a, Ronit Kessel a a b c The Institute of Earth Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel Department of Anthropology, University of California, San Diego, La Jolla, CA, 92093, USA Scripps ...
Copper slags from as early as 4300 BC have also been shown to be good recorders of the Earth's magnetic field intensity and direction (e.g., Ben-Yosef et al., 2008a,b), because: (1) the samples ...
The results demonstrate that with a roasting temperature of 650 °C, a roasting time of 60 min, a slurry concentration solid‐liquid ratio of 25 : 1, a rough magnetic field intensity of 0.16 T, and a selected magnetic field intensity of 0.10 T, the iron grade in the magnetic concentrate increases to 65.49 % and an iron recovery rate of 65.16 % ...
liquid ratio of 25 : 1, a rough magnetic field intensity of 0.16 T, and a selected magnetic field intensity of 0.10 T, the iron grade in the magnetic concentrate increases to 65.49 % and an iron recovery rate of 65.16 % can be achieved. The XRD patterns of magnetic separation concentrate show that the main mineral phases in concentrate are ...
To meet the target, the effect of the following parameters was studied: grain size, magnetic field intensity, thickness of slag layer, moisture content, and re-grinding of the coarser slag particles.
The presence of magnetic inert minerals (RO phase, Fe 3 O 4, Fe) in steel slag powder 13 enables the separation of these minerals from the slag to enhance its gelling properties and facilitate iron resource recovery, thereby improving the activity of steel slag powder. 14 However, during wet magnetic separation operations, hydrated active minerals, such as C 2 S, …
The Earth's magnetic field comes from the movement of molten iron in the core. The field's strength and structure are constantly changing. But paleomagnetists (scientists who study the history of ...
75% fully open and at a magnetic field strength of 641 gauss. The test work was considered a ... Furthermore, unlike the iron making slag and the BOF slag, DHMS does not get charged directly into the Basic Oxygen Furnace (BOF) as a metal scrap supplement or as iron ore replacement since it will increase the sulphur content of liquid ...
When the magnetic field strength is 3000 Gs, the iron grade in the concentrate is 55.65 %, the iron recovery ratio is 88.07 %, and the lead content is 0.49 %, the zinc content is 0.23 %. ... It can be seen from the Figure that the PbS in the pyrolysis slag, magnetic separation concentrate and flotation concentrate accounts for 59.19 %, 37.5 % ...
Generally, the steel slag (steel furnace and ladle furnace slags) contains an appreciable amount of magnetic substances such as metallic iron and magnetic iron oxide, and thus, they can be recycled by wet magnetic separation. This work presented here investigates the effect of fine grinding for maximum recovery of iron from the steel furnace slags.
the diffraction peaks of metallic iron. Furthermore, the intensity of the metallic iron diffraction peaks increased in the range of B= 0.6 T to = 1.0 T. During the initial reduction stage, carbon gasifi-cation did not occur under a low magnetic field intensity, resulting in the iron oxides being in contact with the solid carbon in a solid ...
magnetic separation parameters on iron recovery in more detail. It was observed that low intensity dry magnetic separation did not work effectively for particle sizes that are 106µm and below.
Decadal-scale variations in geomagnetic field intensity from ancient Cypriot slag mounds Ron Shaar1, Lisa Tauxe1, Erez Ben-Yosef1,2, Vasiliki Kassianidou3, Brita Lorentzen4, Joshua M. Feinberg5,6, and Thomas E. Levy7 1 Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA, 2Department of Archaeology ...
ara ted under stro ng magnetic field (0. 1 T). The re maining slag was then collected, ground, and mag netically separate d once again. The final resi dual slag is called tail slag which contains almost exclu sively non-magnetic components and thus can be used as negat ive control. For each component collected for slag is necessitated.
A new eco-friendly approach for recovery of iron from copper smelting slag: Using CO 2 and Cl 2 recycling strategies. Author links open ... 68.58 wt% to 63.51 wt%, and the iron recovery (rate) is increased from 63.34 % to 73.63 %. With the increase of magnetic field intensity, more iron mineral concretions entered the concentrate, which led to ...
Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to replace high-cost steel scrap and iron ores. However, current slag processing is far away from optimum conditions, especially for slag fines with small particle …
In universities and research institutes, the technique used for efficient recycling of iron mainly include dry magnetic separation of bulk slag, wet stage grinding and magnetic separation, wet …
The following essay is reprinted with permission from The Conversation, an online publication covering the latest research.. The Earth's magnetic field, generated some 3,000km below our feet in ...
Effect of magnetic field intensity. For fixed conditions of roasting time: 20 min, roasting ... The Möss spectrum indicates that 93.1 wt.% of iron in oxidized nickel slag is in magnetic ...
The combination of Low and High Intensity Magnetic Separation (LIMS and HIMS) of ground LD slag at 63 μm in wet process may recover ferromagnetic particles (iron oxides) at …
The intensity of Earth's magnetic field changes in a complicated fashion on timescales ranging from days to millions of years. In an effort to characterize field behavior and to understand the geodynamo, high-quality paleointensity data describing the evolution of the field with time are required. ... Ben-Yosef et al. (2009) studied an Iron Age ...
The results indicated that the optimum parameters of iron recovery include a reduction temperature of 1150°C, a reduction time of 120 min, a coal dosage of 25%, a calcium chloride dosage of 2.5%, a magnetic field intensity of 100 mT, and a grinding time of 1 min.
3 addition of 6% (weight percentage), iron and phosphorus in the slag were enriched in the form of magnetite (Fe. 3O. 4) and calcium phosphate (Ca. 10P. 6O. 25) phases respectively under …
The behavior of the ancient geomagnetic field is one of the few available probes for investigating Earth's deep interior through time. By studying the past strength of the geomagnetic field, or paleointensity, we gain information useful for constraining possible modes of fluid motion in the outer core (Glatzmaier et al., 1999, Selkin & Tauxe, 2000, Johnson et al., 2003, Gubbins …
efficient recycling of iron mainly include dry magnetic separation of bulk slag, wet stage grinding and magnetic separation, wet magnetic separation for full grain level, fine-grained level …
The most suitable magnetic field intensity is 75 mT, the magnetic material yield is 46.00%, the iron grade is 29.10%, and the iron recovery is 64.12%. Compared with the initial steel slag, the iron grade increased by 8.22%, and the iron recovery increased by 46.38% compared with the direct magnetic separation without oxidation. Keywords: BOF ...
Iron grade and recovery rate of iron in magnetic (a) and non-magnetic (b) fractions obtained from low intensity dry magnetic separation as function of particle size of LD slag. Source publication +1
In this paper we are reporting the results of the dry and wet separation techniques used for the isolation of the magnetic fraction presented in FS and LS. The results obtained indicate the dry …