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2 results on '"mno2 addition"'

1. Optimization of Microwave-Assisted Oxidation Roasting of Oxide–Sulphide Zinc Ore with Addition of Manganese Dioxide Using Response Surface Methodology

Author

Lin Jin, Zhu Xingcai, Yang Kun, and Peng Jinhui

Subjects
oxidation roasting, oxide–sulphide zinc ore, response surface methodology, mno2 addition, Technology, Chemical technology, TP1-1185, Chemicals: Manufacture, use, etc., TP200-248
Abstract

The present study deals with a microwave-assisted oxidation roasting oxide–sulphide zinc ore technology of with addition of manganese dioxide. Effects of roasting parameters such as MnO2 addition level, roasting temperature, and holding time are studied by using the Central Composite Design (CCD). Meanwhile, zinc calcines are characterized by phase compositions analyses(XRD), structure characteristics of minerals (FT-IR), micro-area chemical analyses (SEM-EDAX) and elemental valence bonding analyses (XPS), which prove to be in accordance with the CCD results. The optimum roasting conditions are decided as MnO2 addition level being 85.14 %, roasting temperature 680 °C, and holding time 41 mins, and oxidation degree of zinc can reach 88.22 %. Besides, when MnO2 addition level reaches a certain value, zinc will aggregate in a form of ZnMn2O4, one battery material.

Published
2019
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2. Optimization of Microwave-Assisted Oxidation Roasting of Oxide–Sulphide Zinc Ore with Addition of Manganese Dioxide Using Response Surface Methodology

Author

Xingcai Zhu, Jin Lin, Jinhui Peng, and Kun Yang

Subjects
Technology, Materials science, Oxide, chemistry.chemical_element, Chemicals: Manufacture, use, etc, 02 engineering and technology, Manganese, TP1-1185, 010501 environmental sciences, 01 natural sciences, Microwave assisted, response surface methodology, chemistry.chemical_compound, Carbonate-hosted lead-zinc ore deposits, General Materials Science, Response surface methodology, Physical and Theoretical Chemistry, 0105 earth and related environmental sciences, Roasting, Materials processing, Chemical technology, Metallurgy, TP200-248, 021001 nanoscience & nanotechnology, Condensed Matter Physics, oxidation roasting, chemistry, Mechanics of Materials, oxide–sulphide zinc ore, 0210 nano-technology, mno2 addition
Abstract

The present study deals with a microwave-assisted oxidation roasting oxide–sulphide zinc ore technology of with addition of manganese dioxide. Effects of roasting parameters such as MnO2 addition level, roasting temperature, and holding time are studied by using the Central Composite Design (CCD). Meanwhile, zinc calcines are characterized by phase compositions analyses(XRD), structure characteristics of minerals (FT-IR), micro-area chemical analyses (SEM-EDAX) and elemental valence bonding analyses (XPS), which prove to be in accordance with the CCD results. The optimum roasting conditions are decided as MnO2 addition level being 85.14 %, roasting temperature 680 °C, and holding time 41 mins, and oxidation degree of zinc can reach 88.22 %. Besides, when MnO2 addition level reaches a certain value, zinc will aggregate in a form of ZnMn2O4, one battery material.

Published
2019

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