Precise regulation of the phase transformation for pyrolusite during the reduction roasting process

Wang, Ruofeng; Gao, Peng; Yuan, Shuai; Li, Yanjun; Liu, Yingzhi; Huang, Cheng

doi:10.1007/s12613-023-2688-4

Int J Miner Metall Mater

2024

DOI: 10.1007/s12613-023-2688-4

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Precise regulation of the phase transformation for pyrolusite during the reduction roasting process

Ruofeng Wang,

Peng Gao,

Shuai Yuan

et al.

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Cited by 3 publications

References 47 publications

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High efficiency and cost-effective innovative self-oxidation in-situ removal scheme for the preparation of battery-grade manganese sulphate

Ou,

Yang,

Chen

et al. 2024

Chemical Engineering Journal

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High efficiency and cost-effective innovative self-oxidation in-situ removal scheme for the preparation of battery-grade manganese sulphate

Ou,

Yang,

Chen

et al. 2024

Chemical Engineering Journal

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Green iron recovery through hydrogen-based mineral phase transformation using ultrafast air-cooling for heat recycling: A pilot-scale investigation

Wang,

Zhang,

Sun

et al. 2024

Journal of Cleaner Production

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Investigation of Appropriate Collector Selection for Hematite Removal from Pyrolusite and the Adsorption Mechanism on the Crystal Surface

Shi,

Nan,

Song

et al. 2024

Minerals

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This study examined the appropriate hematite (Fe2O3) collector for the concentration of pyrolusite (MnO2) in a reverse flotation. Actual ore flotation studies were performed to determine how sodium oleate, sodium dodecyl sulfonate, and oxidized paraffin soap affect hematite removal during reverse flotation of pyrolusite ore. In order to explore the flotation mechanism, simulation experiments were carried out. Firstly, the crystal models of pyrolusite and hematite were established. Then, in order to verify the reliability of the simulation results, the simulated XRD spectra of the crystal model were compared with the measured spectra. Finally, density functional theory and molecular dynamics modeling were used to study the interaction between collector molecules and mineral surfaces. The flotation test results show that oxidized paraffin soap is the best hematite collector and promotes its flotation, removing iron from pyrolusite. Molecular dynamics simulations and density functional theory show that the three collectors (oxidized paraffin soap, sodium oleate, and sodium dodecyl sulfonate) have a much stronger interaction with hematite than with pyrolusite. Therefore, it is possible to separate pyrolusite and hematite through flotation. The simulation results also show that oxidized paraffin soap has the highest adsorption strength and selectivity for hematite. This characteristic makes oxidized paraffin soap an excellent collector for effectively removing hematite from pyrolusite in the reverse flotation process.

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Precise regulation of the phase transformation for pyrolusite during the reduction roasting process

Cited by 3 publications

References 47 publications

High efficiency and cost-effective innovative self-oxidation in-situ removal scheme for the preparation of battery-grade manganese sulphate

High efficiency and cost-effective innovative self-oxidation in-situ removal scheme for the preparation of battery-grade manganese sulphate

Green iron recovery through hydrogen-based mineral phase transformation using ultrafast air-cooling for heat recycling: A pilot-scale investigation

Investigation of Appropriate Collector Selection for Hematite Removal from Pyrolusite and the Adsorption Mechanism on the Crystal Surface

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