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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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The constrained magnetic calculations required convergence of the energy and forces with respect to a constraining penalty term 32.In some limited cases it was computationally prohibitive to ...
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Iron was eficiently received by reduction of red mud at 1400 °C for 100 min to increase the magnetism of iron-bearing substances, and a 98.37% iron recovery eficiency was …
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The grinding-magnetic separation results of reduced briquettes show that concentrate containing 3.25 % Ni, 1.20 % Cu and 75.26 % Fe is obtained and selective enrichment is achieved with a recovery of 82.20 %, 80.00 % for nickel and copper respectively, while the recovery of iron is only 42.17 %.
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However, the effect of magnetic separation for upgrading Fe 3 O 4 was limited (Fe grade of only 39.87 wt% in the magnetic fraction, at a Fe recovery rate of 91.9 wt%), which was due to the intimate physical association between the iron oxide and siliceous gangue particles in the reduced pellets resulting in inadequate liberation, as …
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Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets. This means the compound shows permanent magnetic properties rather than exhibiting them only in the …
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Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …
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of their excellent remanence, magnetic energy product, and intrinsic coercivity [1,2]. NdFeB magnet scraps are primarily produced during cutting, grinding, and polishing, accounting for ~30% of raw materials in the production of magnets. According to various reports [3–6], the NdFeB magnet scraps containing ~25% rare earth and ~65% …
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This calculator provides the calculation of magnetic field inside an iron core for a given number of turns, current, length, and permeability. Explanation Calculation Example: The magnetic field inside an iron core is directly proportional to the number of turns in the coil, the current flowing through the coil, and the permeability of the iron ...
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Request PDF | On Dec 1, 2022, Wenbo Li and others published Enhanced iron recovery from magnetic separation of ultrafine specularite through polymer-bridging flocculation: A study of flocculation ...
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The optimum procedure results in a high-grade iron concentrate with an iron assay of 65.65%, an Fe recovery rate of 80.07%, and an arsenic content of 0.085%, while achieving a 93.29% As removal ...
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A Percent Recovery Calculator is a tool commonly used in chemistry and chemical engineering to determine the efficiency of a separation or purification process. It calculates the percentage of a desired substance that is recovered after the process is completed. The formula for calculating percent recovery is straightforward: Percent Recovery ...
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Explanation. Calculation Example: The magnetic field strength for an iron-core coil is given by the formula B = ??NI / l, where B is the magnetic field strength in teslas, ?? is the permeability of free space (4? _ 10?? T?m/A), N is the number of turns of the coil, I is the current flowing through the coil, and l is the length of the core.
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A magnetic concentrate with a grade of 63.24 % iron and a recovery of 95.05 % iron can be achieved, as shown in Fig. 12.The chemical composition analysis of magnetic concentrate and tailing are shown in Table 5, Table 6, respectively. Download : Download high-res image (132KB) Download : Download full-size image; Fig. 12.
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The recovery is the percentage of the total element or mineral contained in the sludge that is recovered in the concentrate. The calculation requires the mass balance of the separation, as well as the grades of feed and concentrate: (2) R = c * C f * F where c is the grade (content) of element or mineral in the concentrate, f is the grade of ...
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Keywords: high-phosphorus iron ore; additives; reduction roasting; magnetic separation; iron recovery; dephosphorization 1. Introduction With the rapid development of the iron and steel industry, high-grade and easy-to-process iron ores are gradually de-creasing [1–4]. Therefore, the investigation of refractory iron
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The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% ...
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In general, the industrial flowsheets for the beneficiation of itabirite iron ores from the Quadrilátero Ferrífero (Minas Gerais state) in Brazil involves grinding, desliming, magnetic separation and cationic reverse flotation using both mechanical and columns flotation cells. At Brazilian plants, it is estimated that Fe losses generated at the slimes …
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The recovery of iron from zinc leaching residue by selective reduction roasting with carbon was studied. The effects of roasting temperature, duration time and mass ratio of carbon to residue on decomposition of ZnFe 2 O 4, iron recovery and iron grade were investigated based on thermodynamic calculation and phase composition …
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Iron recovery from magnetic separation of ultrafine specularite was improved by polymer-bridging flocculation. Cross-linked starch and carboxymethyl starch exhibited …
DetailsHave you been looking for a quick way how to calculate your flotation circuit's metal recovery? You have no concentrate weights all you have are metal assays. Here …
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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.
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After magnetic separation, the grade and recovery of magnetic separation iron concentrate are improved slightly. At present, there are three methods to study the kinetics of magnetization roasting. The first method is to use the CO and CO 2 content in the tail gas to calculate the pyrolysis kinetics of the iron phase.
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A magnetic concentrate containing 90.12% iron (recovery 94.95%) was obtained from a red mud containing 48.23% total iron in the presence of 6% Na 2 SO 4, 6% Na 2 CO 3 and optimal conditions: a ...
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In recent years, the process of oxidizing steel slag has become the focus of attention. This method oxidizes the non-magnetic phase FeO inside the steel slag into a ferromagnetic phase Fe 3 O 4 or …
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NdFeB magnet scraps contain large amounts of iron, which poses challenges in recycling and greatly hinders the recovery of rare earths through direct hydrometallurgical treatment. To address this issue, we conducted tests using a flash furnace to explore the low-temperature reduction behavior of NdFeB magnet scraps …
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The amount of iron recovery was noted to be about 94.95% from a red mud with 48.23% iron content in the presence of 6% sodium carbonate (Na 2 CO 3 ) and 6% sodium sulphate (Na 2 SO 4 ) (Rao et al ...
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The grinding-magnetic separation results of reduced briquettes show that concentrate containing 3.25 % Ni, 1.20 % Cu and 75.26 % Fe is obtained and selective enrichment is …
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Concentration and Recovery Formulas. These are used to compute the production of concentrate in a mill or in a particular circuit. The formulas are based on …
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As shown in Figure 13.2, minerals with ferromagnetic properties have high susceptibility at low applied field strengths and can therefore be concentrated in low intensity (<~0.3 T) magnetic separators. For low-intensity drum separators (Figure 13.11) used in the iron ore industry, the standard field, for a separator with ferrite-based magnets, is 0.12 T at a …
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As presented in Figure 7, the recovery rate and yield of iron were first increased and later decreased as the CaO increased, while the iron content remained nearly constant. It is also worthwhile to mention that the maximum value of the iron recovery rate and yield achieved were 74.71% and 54.09% at 12 wt.% CaO, while the …
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DetailsThe results revealed that the magnetic concentrate contained 90.31 % total iron and 89.76 % metallic iron, resulting in a total iron recovery rate of 83.88 %. This procedure was slightly more complicated than the purely magnetic separation procedure, but it was more flexible in application.
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The recovery rate of iron increased significantly at a magnetic intensity of 0.3 T and did not exhibit any significant change at higher magnetic intensities; however, the grade of iron decreased significantly due to the increase in …
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A finely ground artificial magnetite ore was subjected to a series of Davis magnetic tube tests, and the resulting concentrate grade and recovery data were plotted to yield the Magnetic Separation Characteristic (MSC) curve. Several iso-efficiency curves for this magnetite ore are drawn in to show their relationship to the MSC curve.
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With the depletion of high-quality iron ore resources, high-phosphorus oolitic hematite (HPOH) has attracted great attention due to its large reserve and relatively high iron content. However, HPOH is very difficult to be used in ironmaking process due to its special structure. A two-step method of gas-based direct reduction and magnetic …
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The present research work is focused on the development of an alternative microwave reductive roasting process of red mud using lignite (30.15 wt.% C fix), followed by wet magnetic separation, in order to produce a raw material suitable for sponge or cast iron production.The reduction degree of iron was controlled by both the reductive agent …
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Semantic Scholar extracted view of "Enhanced Iron Recovery from Magnetic Separation of Ultrafine Specularite Through Polymer-Bridging Flocculation: A Study of Flocculation Performance and Mechanism" by Wenbo Li et al.
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Wang Hongyu, Li Keqing, Ni Wen, et al. Experimental research of deep reduction and magnetic separation process of a high-iron copper slag [J]. Metal Mine, 2012(11): 141–144. Google Scholar Yang Huifen, Jing Lili, Dang Chunge. Iron recovery from copper slag with lignite-based direct reduction followed by magnetic separation [J].
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