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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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The major disadvantage of the reduction roasting process is the intensive energy consumption, high investment and operating costs as well as the occasional release of harmful gases. The hydrometallurgical reductive leaching method possesses the advantages of energy conservation and one-step leaching process.
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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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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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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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In recent years, efforts have focused on developing a low-cost reduction method using on a non-coal reductant. In this study, Fe P slag, a byproduct of the yellow phosphorus industry, was …
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In this article, a novel efficient and environmental reductive roasting-acid leaching technique was proposed by a combined pretreatment of the microwave heating and reduction of alkali lignin. Factors influencing the leaching of manganese from manganese oxide ores were investigated, such as heating modes (microwave heating and conventional heating), …
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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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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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Among the reported technologies used to process man-ganese ores, roasting has a considerable potential for use in commercial applications [22,29–30]. During the roasting of manganese oxide, manganese ore is reduced under high-tem-perature conditions (roasting), and manganese minerals un-dergo a phase transformation through chemical reactions
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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 ... Novel Understanding of Simultaneous Extraction of …
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DOI: 10.1016/J.HYDROMET.2015.05.017 Corpus ID: 92940276; Extraction of manganese from iron rich MnO2 ores via selective sulfation roasting with SO2 followed by water leaching @article{You2015ExtractionOM, title={Extraction of manganese from iron rich MnO2 ores via selective sulfation roasting with SO2 followed by water leaching}, author={Zhixiong You and …
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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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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 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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DOI: 10.1016/J.APT.2017.05.023 Corpus ID: 136042803; Investigations on the MnO2-Fe2O3 system roasted in air atmosphere @article{Bingbing2017InvestigationsOT, title={Investigations on the MnO2-Fe2O3 system roasted in air atmosphere}, author={Liu Bingbing and Yuanbo Zhang and Wang Juan and Manman Lu and Zhiwei Peng and Guanghui Li and Tao Jiang}, …
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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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A recovery efficiency for chemical MnO2 of 36.6% was obtained via preparation from Pb-removed EMAS through the "roasting-pickling disproportionation" process, with an acid washing time of 100 min ...
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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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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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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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The kinetics of the reduction of MnO 2 by Fe 2+ ions in H 2 SO 4 solution were investigated under well-defined hydrodynamic conditions. The reaction was monitored potentiometrically using a saturated calomel electrode and a Pt electrode. The effect of stirring rate, particle size, temperature, Fe 2+ and H + concentrations were studied. Under high …
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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 …
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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 for 5 h and the leaching process was performed using 2-mol/L H2SO4 at 70 °C for 30 min with a liquid-to-solid ratio of 10 and a stirring rate of 200 rpm.
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Metals 2022, 12, 384 4 of 15 (Ca0.8Mn4O8(H2O)2).The size of raw material was ground to approximately 80 wt% passing through 0.074 mm before its use in reduction roasting. In addition, chemically pure
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In this study, the reaction mechanism between MnO2 and gaseous sulfur was investigated. Thermodynamically, the reduction of MnO2 by gaseous sulfur is feasible. The predominant …
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The results indicated that biomass char is obviously better than activated carbon in roasting time and manganese reduction efficiency. Roasting reduction of pyrolusite undergoes the process of ...
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Compared to traditional roasting, the proposed microwave-enhanced roasting process benefits from the superior kinetic conditions provided by the synergy between microwave enhancement and compact ...
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Effect of roasting temperature on weight loss during the roasting process for 1 h. Umm-Bogma low-grade manganese ore XRD patterns at different roasting temperatures from 800°C to 1200°C for 1 h. +9
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