In this study, a novel reduction method for MnO 2 ore was developed using Fe P slag as the reductant. MnO 2 ore can be adequately reduced by Fe P slag, and the product of …
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The experimental validation for reduction roasting and H2SO4 leaching revealed that 98.2% of the extracted Mn was obtained when the mixture (Fe–P: MnO2 ore = 5:100, m/m) was roasted at 500 °C ...
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However, the main problems with the reduction roasting process are the low efficiency of recovery of Mn, high investment, intensive energy consumption and operating cost and CO 2, SO x, a great ...
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The reaction process could be described by an unreacted nuclear model. Manganese was extracted by sulfuric acid solution after reduction by sulfur waste. In sulfuric acid, 95.2 wt% Mn extraction was achieved, using a roasting temperature of 450 °C, roasting time of 30 min, and S2/MnO2 molar ratio of 0.40.
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Semantic Scholar extracted view of "Cleaner extraction of vanadium from vanadium-chromium slag based on MnO2 roasting and manganese recycle" by Jing Wen et al. Skip to search form Skip to ... The HIsmelt smelting reduction process is an efficient direct reduction process for smelting vanadium titanomagnetite ores. About 80% vanadium is …
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DOI: 10.1016/J.APT.2018.11.006 Corpus ID: 105564100; A further investigation on the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere @article{Bingbing2019AFI, title={A further investigation on the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere}, author={Liu Bingbing and Yuanbo Zhang and Wang Jia and Wang Juan and Su Zijian and Guanghui Li …
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To understand the reduction process of MnO 2 by CH 4-H 2 gas mixture, the effects of various CH 4/(CH 4 +H 2) molar ratios ... 99.99 vol.%. A reduction-roasting experiment was
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The mechanism involved in the phase transformation process of pyrolusite (MnO2) during roasting in a reducing atmosphere was systematically elucidated in this study, with the …
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The fire reduction leaching process is roasting under the condition of adding solid reducing agents or passing reducing gases to reduce the high-valent manganese oxides to MnO, followed by leaching with the acid solution for manganese extraction. ... (MnO2), which is stable under sulfuric acid or alkaline conditions (Ali et al., 2016). Show ...
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The recovery of antimony from high arsenic-bearing flue dusts was carried out by a selective oxidation roasting process using MnO2, in which the arsenic was removed through a volatilization and ...
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Methane and hydrogen reduction has emerged as promising technology for clean and efficient metallurgy. To understand the reduction process of MnO2 by CH4-H2 gas mixture, the effects of various CH4/(CH4 + H2) molar ratios (0–1) and temperatures (1100°C–1250°C) on the reduction of pure MnO2 were researched. Characterization of the solid carbon derived …
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DOI: 10.1016/J.POWTEC.2017.11.010 Corpus ID: 102750374; A study on the carbonization and alloying process of MnO2 by methane-hydrogen gas mixture in the presence of Fe2O3 @article{Bingbing2018ASO, title={A study on the carbonization and alloying process of MnO2 by methane-hydrogen gas mixture in the presence of Fe2O3}, author={Liu Bingbing and Yuanbo …
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The reaction process could be described by an unreacted nuclear model. Manganese was extracted by sulfuric acid solution after reduction by sulfur waste. In sulfuric acid, 95.2 wt% Mn extraction was achieved, using a roasting temperature of 450 °C, roasting time of 30 min, and S2/MnO2 molar ratio of 0.40.
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To understand the reduction process of MnO 2 by CH 4-H 2 gas mixture, the effects of various CH 4 /(CH 4 + H 2) molar ratios (0–1) and temperatures (1100°C–1250°C) on the …
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In this study, the reaction mechanism between MnO 2 and gaseous sulfur was investigated. Thermodynamically, the reduction of MnO 2 by gaseous sulfur is feasible. The predominant phase diagram as functions of temperature and input S 2 (g) fraction in the S 2 …
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The experimental validation for sulfation roasting and water leaching revealed that 90.6% of manganese and only 3.5% of iron were extracted when sulfation roasting was conducted at 500 °C for 60 min with SO 2 partial pressure (SO 2 / (SO 2 + N 2)) of 0.5%–1.0% (Vol.), and the leaching process was performed at 50 °C for 15 min with liquid-to ...
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Extraction of manganese from iron rich MnO2 ores via selective sulfation roasting with SO2 followed by water leaching. ... Utilization of low-grade manganese ore adopting the carbothermic reduction roasting process is a proven method to produce high-grade manganese ore. To minimize industrial waste and protect the …
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However, Mn-Zn spinel was easily formed in spent batteries, which were stubborn and only dissolved in strong acid systems. In this study, a novel process for selective recovery of Zn and Mn from waste batteries by reduction roasting followed by an acid leaching process was developed, of which spent graphite electrodes were used as reducing agents.
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Download scientific diagram | Effect of roasting time on the leaching ratio of Mn (450 °C, S2/MnO2: 0.5). from publication: Novel Process of Reduction Roasting Manganese Ore with Sulfur Waste and ...
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This work investigated the phase transformation of MnO2 and Fe2O3 system roasted at 500–1400 °C in air atmosphere to understand the formation process of manganese ferrite. ... The reduction of ...
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In this work, the effect of temperature on the magnetic reduction roasting - magnetic separation of Fe-Mn ore was investigated firstly. Then the reduction behaviors of MnO2-Fe2O3 system and MnO2-Fe2O3-10 wt.% SiO2 system under 10 vol.% CO-90 vol.% CO2 at 600-1000 degrees C were investigated by XRD, XPS, SEM-EDS, VSM, DSC and thermodynamics ...
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The experimental validation for reduction roasting and H2SO4 leaching revealed that 98.2% of the extracted Mn was obtained when the mixture (Fe–P: MnO2 ore = 5:100, m/m) was roasted at 500 °C ...
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During the reductive roasting process, MnSO 4 as well as gaseous SO 2 were simultaneously generated. The reaction between MnS and Mn 3 O 4 occurred at temperatures …
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Sodium salts were used in the reduction roasting and magnetic separation process to separate and recover iron and manganese from the high-iron manganese oxide ores to uttermost utilize the complex ...
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The experimental validation for reduction roasting and H 2 SO 4 leaching revealed that 98.2% of the extracted Mn was obtained when the mixture (Fe–P: MnO 2 ore = 5:100, m/m) was roasted at 500 °C for 5 h and the leaching process was performed using 2-mol/L H 2 SO 4 at 70 °C for 30 min with a liquid-to-solid ratio of 10 and a stirring rate ...
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It is very important to selectively reduce manganese oxide over iron oxide for extraction of Mn from iron-rich manganese ore. In this study, reductive roasting of an iron-rich manganese oxide...
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Magnetic reduction roasting followed by magnetic separation process is reported as a simple route to realize separation of Mn and Fe from ferruginous manganese ores (Fe-Mn ores).
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Reduction roasting was carried out at 450 °C with a S 2 /MnO 2 molar ratio of 0.5. The amount of Mn extracted by acid leaching increased from 71.6 to 95.2 wt% as the roasting time increased …
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Since MnO 2 is stable in direct acid or alkali dissolution, the possible reduction of the insoluble tetravalent manganese (IV) to soluble bivalent manganese (II) is necessary to …
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To understand the reduction process of MnO2 by CH4-H2 gas mixture, the effects of various CH4/(CH4 + H2) molar ratios (0–1) and temperatures (1100°C–1250°C) on the reduction of pure MnO2 ...
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