TY - JOUR
T1 - Dielectric properties and thermal behavior of electrolytic manganese anode mud in microwave field
AU - Li, Kangqiang
AU - Chen, Jin
AU - Peng, Jinhui
AU - Ruan, Roger
AU - Omran, Mamdouh
AU - Chen, Guo
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/15
Y1 - 2020/2/15
N2 - Exploring the dielectric properties of a material can provide guidance for applications of microwave technology to the material. In this work, dielectric properties and thermal behavior of manganese anode mud and pure MnO2, CaSO4 and PbSO4 components were systematically investigated. Results indicated that manganese anode mud showed excellent responsiveness to microwaves, with εr′ value of 17.971 (F/M) at room temperature and a maximum value of 20.816 (F/M) at 150 °C, rendering it took only 5.5 min for manganese anode mud to be heated from room temperature to 1000 °C. The dielectric properties of manganese anode mud were related to its thermal behavior, mainly affected by MnO2 component. Moreover, the heating process of manganese anode mud was divided into four stages identified by temperatures: less than 200 °C, 200 °C–700 °C, 700 °C–900 °C, greater than 900 °C, corresponding to the five stages of thermal behavior: the removal of absorption water and combined water, the decomposition reaction of Pb2Mn8O16, and the deoxidation reactions of PbO2, MnO2 and Mn3O4. The work highlights the feasibility of processing manganese anode mud by microwave heating.
AB - Exploring the dielectric properties of a material can provide guidance for applications of microwave technology to the material. In this work, dielectric properties and thermal behavior of manganese anode mud and pure MnO2, CaSO4 and PbSO4 components were systematically investigated. Results indicated that manganese anode mud showed excellent responsiveness to microwaves, with εr′ value of 17.971 (F/M) at room temperature and a maximum value of 20.816 (F/M) at 150 °C, rendering it took only 5.5 min for manganese anode mud to be heated from room temperature to 1000 °C. The dielectric properties of manganese anode mud were related to its thermal behavior, mainly affected by MnO2 component. Moreover, the heating process of manganese anode mud was divided into four stages identified by temperatures: less than 200 °C, 200 °C–700 °C, 700 °C–900 °C, greater than 900 °C, corresponding to the five stages of thermal behavior: the removal of absorption water and combined water, the decomposition reaction of Pb2Mn8O16, and the deoxidation reactions of PbO2, MnO2 and Mn3O4. The work highlights the feasibility of processing manganese anode mud by microwave heating.
KW - Dielectric properties
KW - Heating characteristics
KW - Manganese anode mud
KW - Microwave heating
KW - Thermochemical behavior
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U2 - 10.1016/j.jhazmat.2019.121227
DO - 10.1016/j.jhazmat.2019.121227
M3 - Article
C2 - 31628055
AN - SCOPUS:85073511519
SN - 0304-3894
VL - 384
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 121227
ER -