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microwave manganese ore reduction

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Rapid microwave-assisted reduction of ferromanganese

Mar 01, 2021 · The manganese ore could be rapidly decomposed to manganese oxides at 1000 °C in 17 min under microwave irradiation (Chen et al., 2017). The reduction of manganese oxide ore in the presence of coal under microwave irradiation showed that the newly-generated metallic iron phase interweaved with manganese and the content of manganese increased

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Microstructure of Solid Phase Reduction on Manganese Oxide

Manganese oxide ore fines containing coal (MOOFCC) in microwave field have good property of absorbing microwave in the process of temperature rising and reduction.

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Microwave Dielectric Properties and Reduction Behavior of

Manganese ore is an important mineral having a strategic role in the development of the national economy and society. In this study, the dielectric properties, heating curve, crystal structure, and reduction ratio of a low-grade pyrolusite were investigated.

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Investigation on microwave carbothermal reduction behavior

Jul 01, 2020 · Microstructure of solid phase reduction on manganese oxide ore fines containing coal by microwave heating J Iron Steel Res Int,17 ( 2010 ),pp. 13 20 View Record in Scopus Google Scholar

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Microwave processing of spent coin cells for recycling of

Jan 20, 2021 · Mn ore: Microwave-assisted reduction of MnO 2 to MnO at 550 °C, 50 min, yield ∼ 96.65%. MnO (He et al., 2019) Mn ore: Reduction of MnO 2 by lignosulfonate in sulfuric acid, 2.26 M, S/L ratio 1:10, 200 rpm, 95 °C, 30 min: Manganese in acid solution (Wu et al., 2020) Mn ore

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Microwave dielectric properties and thermochemical

Aug 01, 2019 · The ability to rapidly heat dielectric materials is often used as a heat source and a traditional alternative to conductive heating. Ye et al. studied the carbothermal reduction of manganese ore by using microwave heating, with the maximum manganese recovery of 97.2% at 800 °C for 40 min and complete elimination of Fe 2+ (Ye et al., 2014).

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Microwave Dielectric Properties and Reduction Behavior of

Manganese ore is an important mineral having a strategic role in the development of the national economy and society. In this study, the dielectric properties, heating curve, crystal structure, and reduction ratio of a low-grade pyrolusite were investigated.

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Microwave Dielectric Properties and Reduction Behavior of

May 13, 2019 · Manganese ore is an important mineral having a strategic role in the development of the national economy and society. In this study, the dielectric properties, heating curve, crystal structure, and reduction ratio of a low-grade pyrolusite were investigated. The dielectric constant, dielectric loss factor, and loss tangent coefficient of low-grade pyrolusite at room temperature were evaluated

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Microwave dielectric properties and thermochemical

Aug 01, 2019 · The ability to rapidly heat dielectric materials is often used as a heat source and a traditional alternative to conductive heating. Ye et al. studied the carbothermal reduction of manganese ore by using microwave heating, with the maximum manganese recovery of 97.2% at 800 °C for 40 min and complete elimination of Fe 2+ (Ye et al., 2014).

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Pilot-scale study on enhanced carbothermal reduction of

Jan 15, 2020 · The method to treat high-grade manganese ore offers advantages such as high reduction rate, simple process and convenient operation, while the method is processing low-grade manganese ore, quartz (SiO 2) component with high content is easily softened and sintered at temperatures higher than 600 °C; meanwhile, the reduction temperature by coal

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(PDF) Investigation on microwave carbothermal reduction

Results indicated that manganese oxide (MnO) powder can be efficiently prepared, and the reduction ratio presented positive relationships with reduction temperature and heating time, obtaining

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Kinetics of Microwave-Assisted Reduction of Manganese

The reduction rates of manganese oxide by carbon and SiC was examined by heating MnO2-carbon and MnO2-SiC mixtures in a 7-kW industrial microwave oven. The results show that the rate of the reduction increased with the amount of carbon in MnO2-carbon mixture and with SiC in MnO2-SiC mixture. The rate of the MnO2 reduction by carbon was proportional to the reaction time, and that by

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Dielectric properties and high temperature thermochemical

Nov 01, 2020 · The previous works mainly focused on the reduction reaction of pyrite itself in the roasting process under conventional conditions, or simply using microwave as energy to treat manganese ore. However, there are few reports on the microwave absorption characteristics of pyrolusite and pyrolusite-pyrite mixture under microwave heating.

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Carbothermic Reduction of Ferruginous Manganese Ore for

In the present paper, beneficiation of Fe and Mn elements from a ferruginous manganese ore via carbothermic reduction followed by magnetic separation process was investigated in detail. The effects of the experimental parameters were systematically discussed. Iron-rich products with an Fe grade of 62.3% and 88.2% of Fe recovery, and manganese-rich product with a Mn grade of 63.7% of and

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Kinetics characteristics and microwave reduction behavior

The microwave reduction behavior and pyrolysis kinetic characteristics of walnut shell-pyrolusite blends were explored. Results indicated the optimal reduction parameters were: reduction temperature of 650 °C, holding time of 30 min, M bio /M ore of 1.8:10, and microwave power of 1200 W. The co-pyrolysis characteristics of the blends included

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Microwave Dielectric Properties and Reduction Behavior of

May 13, 2019 · Manganese ore is an important mineral having a strategic role in the development of the national economy and society. In this study, the dielectric properties, heating curve, crystal structure, and reduction ratio of a low-grade pyrolusite were investigated. The dielectric constant, dielectric loss factor, and loss tangent coefficient of low-grade pyrolusite at room temperature were evaluated

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Microwave Production of Manganese from Manganese (I V

The pre-reduction of manganese ores by carbon has been investigated by Abdel Halim et al.,(2011), Ishak and Tangstad (2007), and Gao et al.,(2012). The pre-reduction of higher manganese oxides to MnO using HDPE and the effect of HDPE addition on the pre-reduction of Mn3O4 to MnO by metallurgical coke were investigated by Dankwah

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Comparative analysis of the effect of microwave

May 01, 2017 · The microwave-pretreated soft and friable manganese ore samples showed a 47.82 percent reduction in d80 during grinding and higher manganese recovery of 42.46 percent during liberation analysis. The microwave pretreatment and milling of hard and banded iron ore reduced the d80 by 20.83 percent, but no improvement was observed in mineral liberation.

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Microwave Dielectric Properties and Reduction Behavior of

Manganese ore is an important mineral having a strategic role in the development of the national economy and society. In this study, the dielectric properties, heating curve, crystal structure, and reduction ratio of a low-grade pyrolusite were investigated. The dielectric constant, dielectric loss factor, and loss tangent coefficient of low-grade pyrolusite at room temperature were evaluated

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Research status of microwave-assisted reduction technology

Keywords:Microwave heating, Pyrolusite, Microwave reduction, Conventional reduction technology. Abstract:Manganese ore is an important metallurgical raw material that holds an important strategic position in the national economy of China. However, the grade of manganese ore in the country is mostly low, and the utilization efficiency of

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Carbothermal reduction characteristics of oxidized Mn ore

Nov 19, 2019 · For the purpose of exploring a potential process to produce FeMn, the effects of microwave heating on the carbothermal reduction characteristics of oxidized Mn ore was investigated. The microwave heating curve of the mixture of oxidized Mn ore and coke was analyzed in association with the characterization of dielectric properties. The comparative experiments were

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Kinetics of Microwave-Assisted Reduction of Manganese

The reduction rates of manganese oxide by carbon and SiC was examined by heating MnO2-carbon and MnO2-SiC mixtures in a 7-kW industrial microwave oven. The results show that the rate of the reduction increased with the amount of carbon in MnO2-carbon mixture and with SiC in MnO2-SiC mixture. The rate of the MnO2 reduction by carbon was proportional to the reaction time, and that by

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Carbothermal reduction characteristics of oxidized Mn ore

The developed thermodynamics considered that microwave heating could make the reduction of MnO to Mn more accessible and increase the reduction extent. For the purpose of exploring a potential process to produce FeMn, the effects of microwave heating on the carbothermal reduction characteristics of oxidized Mn ore was investigated.

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Microwave roasting of ore

Microwave roasting of ore Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Microwave roasting of ore, quarry, aggregate, and different kinds of minerals.

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Carbothermal Solid State Reduction of Manganese Ores: 3

course of reduction of Wessels ore with 14mass% C and 25mass% C in hydrogen at 1200°C can be seen from XRD spectra in Figs. 1and 2 respectively. Stoichiometric content of carbon in the graphite/ore mixture for reduction of iron and manganese oxides to (Fe,Mn) 7 C 3 is 19mass%. The re-duction started with reduction of higher manganese oxides

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Microstructure of solid phase reduction on manganese oxide

Mar 01, 2010 · Microstructure of solid phase reduction on manganese oxide ore fines containing coal (MOOFCC) is one of important kinetics conditions of influencing microwave heating. On condition that an atomic molar ratio of rO: rC- in MOOFCC is 1 : 1.06 as well as a molecular molar ratio of $${r_{{\rm{Si}}{{\rm{O}}_{\rm{2}}}}}$$ : rCaO is 1: 1.28, 1 kg of MOOFCC is heated by microwave to

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Methods of Ore Pretreatment for Comminution Energy Reduction

For the influence of ore texture on the ore’s response to microwave pretreatment, Batchelor et al. (2015) used lead–zinc, nickel, and copper ores to demonstrate that a high reduction in strength can be achieved in ores with a consistent texture after exposure to microwave radiation . Microwave applied energy has a major influence on ore

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Reduction of Manganese Ores in CO-CO2 Atmospheres

Nov 20, 2020 · The reduction of higher manganese oxides to MnO in the prereduction zone of a ferromanganese furnace is largely decisive for the overall energy efficiency and climate gas emissions for the overall production process. Kinetics of the gas-solid reaction between the ore and CO(g) in the ascending furnace gas is dependent on the ore characteristics. The aim of this study was to elucidate

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Prereduction and magnetic separation of low grade

PREREDUCTION AND MAGNETIC SEPARATION OF . LOW GRADE MANGANESE ORE . by . Yubo Gao . A thesis submitted to the faculty of . The University of Utah .

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