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202361 · The experimental process was presented in Fig. 1 and comprised three stages, including magnetization roasting of iron tailings, alkaline leaching of roasted products, and magnetic separation of leaching residue. The roasted ore was leached with NaOH solution to remove Si-Al gangue minerals, following a procedure that entailed …
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2 Direct Reduction Processes. Direct reduction (DR) is defined as any process in which metallic iron is produced by the reduction of iron ore at temperatures below the iron melting point. The product of a DR process is called direct reduced iron (DRI). The major consumers of DRI are the smaller steel mills which use DRI to dilute the residual ...
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20231120 · The pyrometallurgical process mainly includes reduction smelting and direct reduction methods. When the reduction smelting method is used to treat cathode materials, lithium often ends up in the slag and dust stream, while Ni, Co, and Mn typically form an alloy (Georgi-Maschler et al., 2012; Hu et al., 2021; Qu et al., 2023). Reduction …
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2023915 · Approaches such as hydrogen-based direct reduction are being considered since they can drastically reduce the overall CO 2 emissions of the steel-making process. ... Methods. To asses the iron ore reduction using the microwave (MW) plasma, we compare two different methods: (i) an atmospheric pressure MW plasma and (ii) a thermal …
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2022730 · The direct reduction of iron oxide in this work can be described. ... 13 Wang L and Peng Z, Microwave-intensi ... teristics of oily hot rolling mill sludge by direct reduced iron method.
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201823 · The third method is the direct reduction–magnetic sepa-ration process proposed by our laboratory [14]. In this process, titanomagnetite is first reduced using pulverized coal, followed by the removal of powdery iron from the va-nadium-bearing titanium tailing by magnetic separation. The vanadium-bearing titanium tailing is leached …
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202161 · Microwave-assisted magnetizing roasts were used to produce an iron ore product from low-grade, goethite-dominant, iron ore plant rejects. Goethite was found to be converted to hematite at temperatures above 370 °C on reduction in a microwave furnace under gas mixtures of 30:70 and 40:60 CO/CO 2 .
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202291 · The current study investigates hydrogen reduction of low-grade iron ore (∼37 % Fe) containing dispersed bands of hematite and jasper/quartzite phases. Gaseous hydrogen reduction is carried out at isothermal conditions in a custom-made tubular furnace, followed by magnetic separation. The reduction temperature (300–600 °C), time (30–90 ...
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201931 · In this manuscript, we summarize the primary optimization process of the coal-based direct reduction-magnetic separation method for metallurgical recovery and further purification of metallurgical solid waste. ... Beneficiation studies of a difficult to treat iron ore using conventional and microwave roasting. Powder Technology, Volume 301 ...
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2021823 · Low-grade saprolite nickel laterite, characterized by complicated minerals composition and fine-grained and complex dissemination, was commonly treated with a low recovery efficiency of Ni and Fe by conventional methods. Hence, an improved direct reduction and magnetic separation process was proposed. Meanwhile, the mechanisms …
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