The end result is a high iron grade magnetite concentrate (+65% Fe), with typically very low impurities. The additional processing cost for the production of magnetite concentrate can be offset by the premium price which it attracts from steel mills because of the high iron content compared to benchmark DSO hematite products.
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— This makes the drying process crucial in the industrial production of pellets, especially in the grate-rotary kiln process [26,27]. Therefore, research on the green pellet properties of a typical magnetite concentrate and three binders (bentonite, MHA, HAMB) and their performance during the drying process were investigated in this study.
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separation, filtering and drying. The final product is a high iron grade magnetite concentrate (+ Ô Ó% Fe), with typically very low impurities. Further processing produces pellets, which can be used directly in a blast furnace or steel-making plant. Magnetite is a benign and highly magnetic substance used primarily
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— The chemical composition of magnetite concentrate and bentonite are presented in Table 1. It can be found that 82 wt% of the iron ore concentrate is composed of magnetite and 11 wt% of hematite, while SiO 2, MgO, CaO, and Al 2 O 3 are present as the main gangues in iron ore concentrate. Total Fe agrees well with reported values in …
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Wet-drop and dry-crush values marginally increased after dry-grinding the magnetite concentrate. Wet drop increased from 3.5 to 4.0 drops, while dry-crush increased from 10.1 to 16.0 N/pellet. Hematite pellets survived 12.5 drops to fracture and a dry compression 28.6 N/pellet. All these results were obtained Wet drop number 25 hematite ...
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— A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K (1150 °C to 1400 °C) with the …
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The resulting magnetite concentrate contains un-liberated magnetite (magnetite particles that are still attached to other minerals) which requires further milling so that the …
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Dry magnetic separation (DMS) enables to separate the non-magnetic fraction of iron ores at the initial stage of their concentration and therefore to decrease cost of their further processing. However, a considerable amount of metal is lost in DMS tails at that.
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The results show that the drying process of artificial magnetite green pellet has three stages, accelerated drying stage, constant drying stage and decelerated drying stage. …
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— Semantic Scholar extracted view of "Oxidation of magnetite concentrate powders during storage and drying" by Seija P. E. Forsmo. Skip to search form ... @article{Forsmo2005OxidationOM, title={Oxidation of magnetite concentrate powders during storage and drying}, author={Seija P. E. Forsmo}, journal={International Journal …
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— Unlike the high-grade hematite ores which are easily processed into saleable iron products, through crushing, grinding or milling, concentration by screening, and/or using hydraulic or magnetic …
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— This bed of wet green pellets is transported through the drying zones, updraft drying (UDD) and downdraft drying (DDD). After the drying zones, the upper part of the pellet bed is dry and warm, around 250 °C, while the bottom of the bed is still humid. ... Magnetite concentrate raw materials and green pellet properties. Five magnetite pellet ...
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Delivers 22mtpa high grade 67% Fe magnetite concentrate product by mid 2022 Fortescue Metals Group Ltd (Fortescue) subsidiary FMG Magnetite Pty Ltd and joint venture partner Formosa Steel IB Pty Ltd (Formosa) have approved the development of Stage 2 of the ... The innovative design, including the use of a dry crushing and grinding circuit, will ...
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— The vanadiferous magnetite concentrate sample was obtained from Anhui province, China. As shown in Table 1, the total iron grade was 67.1%, and the V 2 O 5 and TiO 2 contents were 0.32% and 0.78%, respectively. The main impurities included 1.57% SiO 2 and 0.89% Al 2 O 3.As shown by the XRD pattern in Fig. 1, the main mineral …
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— The shock temperature of the green pellets was measured using a vertical blast furnace with a drying cup (d50 mm × 150 mm) for loading pellets, and 50 pellets were used in each test with a hot air speed of 5 m/s and drying period of 3 min. Chemical compositions of VTM concentrate and binder ash were examined using an X-ray …
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— In the dry synthesis method such as conventional solid-phase synthesis, using strontium oxide and barium oxide as raw materials, the solid solution of strontium iron oxidation was formed by controlling the temperature accurately. ... The magnetite concentrate samples were set to magnetic separation in a wet low intensity magnetic …
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— The Iron Bridge magnetite mine is expected to produce 22 wet million tonnes per annum (wmtpa) of high-grade, magnetite concentrate product. ... followed by pumping of fine-grained concentrate to Port Hedland for drying and shipping through the Fortescue port facilities. Ore will be mined from the North Star, Eastern Limb, Glacier Valley and ...
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— The effect and mechanism of magnetite concentrate morphology on the quality of indurated pellets were investigated. Concentrates with different morphologies were prepared using high-pressure grinding rolls (HPGR) and ball mill (BM) grinding techniques. ... the main problem was the serious cracking during the drying process. …
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ported that titano-magnetite was reduced to iron and tita-nium oxides after the reduction process under an atmosphere consisting of a CO–CO2–Ar gas mixture. Sun et al. [21] proposed a reduction path for titano-magnetite concentrate by H2–Ar gas. Tang [22] investigated the reduction mechan-ism of high-chromium vanadium-titanium magnetite ...
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— The magnetite concentrate used was provided by a taconite processing plant, Plant D. The concentrate contained ~ 8.5% moisture and was 80% passing 49 μm; specific surface area (Blaine) was 2250 cm 2 /g. The concentrate was divided into approximately 2.5 kg samples using a riffle splitter and sealed in plastic bags to preserve moisture …
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The study demonstrated that the use of PMS in the dry beneficiation of magnetite ores is feasible, and operating the PMS in different flowsheet configurations positively influences the magnetite concentrate grade and purity. Finally, the study showed that the PMS performance compares well with that of DTR and can potentially replace DTR in ...
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— The reducing property of pellets prepared by ultrafine magnetite concentrate (UMC) and improving method were revealed. The results show that the reduction degree of UMC pellets is only about 56% compared with that of pellets prepared from ordinary iron ore concentrate with relatively coarse particle size, which is significantly lower than the …
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— In the present paper, the drying, preheating, and roasting characteristics of magnetite pellets and magnetite–hematite blend pellets are systematically studied in …
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Mostly, magnetite iron ore mine materials contain significant amounts of sulfur base components. This can cause disturbance in production process of steel. Although high-sulfur magnetite concentrate … Expand
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In the present work, hematite whiskers were observed to grow on the oxidized surface of magnetite concentrate particles, over the entire temperature range studied (800°C to 950°C). The whisker thickness increased from approximately 30 nm for oxidation at 800°C to 200 nm at 950°C. The whiskers likely act as bridges between concentrate ...
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binder was 0.65% of the weight of the dry magnetite concentrate (in which CMC is 0.15% and nano-CaCO 3 is 0.5%). The initial moisture content of the feed was adjusted to 8.0%. Pelletization experi-ments were performed in a laboratory-scale balling disc with a diameter of 400 mm, depth of 120 mm and inclination angle of 45 . The size of the ...
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— The results indicate that magnetite concentrates of pelletizing fineness already start to oxidize to γ-hematite during drying at 105 °C, although 105 °C is …
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— For the processing of such iron ores, dry magnetic separation (DMS) offers a viable way, and its production of dry concentrate and tailings presents another priority to the WMS process ... The mixture was mixed from a magnetite concentrate assaying 57.46% Fe in magnetite and a quartz ore with a purity of 95.60%. The particle size of this ...
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— For feed particle size below 0.10 mm, the iron grade of magnetite in concentrate reached 43.07% at 98.38% recovery for magnetite, with the iron grade of magnetite in tailings significantly reduced to 1.33%. ... Application and mechanism analysis of air-flow dry magnetic separator on fine magnetite ore. Nonferrous Metals Eng., 12 (9) …
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— The iron ore concentrate (magnetite concentrate) in this study is provided by Nanfen iron mine. Its main chemical compositions were described in our previous study [3]. The TFe of magnetite concentrate is 67.42% and silica is the main gangue constituent. It has a particle size of 87.90% passing 74 μm (200 mesh).
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hematite–magnetite (H–M) concentrate pellets T. Jiang1, Y. B. Zhang*2, Z. C. Huang1,G.H.Li1 and X. H. Fan1 Regressive orthogonal design experiments have been carried out based on the analysis ...
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— The permeability of the sinter green beds will remarkably deteriorate when magnetite concentrate powder is introduced into the raw blend. To address this problem, …
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This paper summarizes the data of pellet studies conducted by Torex LLC in the period 2014–2022 and partially published in [12–14]. In particular, a comparison was made of the analysis of the pellets structure from magnetite concentrates with a SiO 2 content of 2.5–4.0% (sample 1), 4.5–6.0% (sample 2) and 6.5–8.3% (sample 3) in the production …
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