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Analysis of the Sintering Properties of Electrolytic Manganese Residue

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Abstract:

The microstructure and sintering properties of electrolytic manganese residue were investigated in this paper. The XRD results show that the manganese residue primarily consists of quartz (SiO2) and chemical gypsum (CaSO4·2H2O). The crystal phase and structure of gypsum will transform at 107.4, 144.5, 483.2, 901.3 and 1093.5°C, respectively. When sintered from 880 to 940°C, the water–absorption (Wa) and porosity (Pa) of the sintered compact gradually increased, while the bulk density (D) and bending strength decreased instead. Once heated at 940–980°C, both Wa and Pa gradually decreased, but D and bending strength increased rapidly. The SEM observation of fractured surface shows that a number of pores appear at the sample’s interior. The corresponding changes of water absorption, porosity, densification and bending strength of the samples are closely linked to the occurrence of liquid phase inside the sintered compact.

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Periodical:

Advanced Materials Research (Volumes 785-786)

Pages:

1055-1059

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.785-786.1055

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Online since:

September 2013

Authors:

Jian Feng Wu, Mou Sheng Song*, Xiao Hong Xu, Zheng Gang Rao, Hao Cheng

Keywords:

Composition, Manganese Residue, Phase Transformation, Sintering Properties

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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