NDLI: Effects of basicity and MgO content on the viscosity of the SiO$_{2}$-CaO-MgO-9wt%Al$_{2}$O$

Content Provider	Springer Nature Link
Author	Gao, Yun ming Wang, Shao bo Hong, Chuan Ma, Xiu juan Yang, Fu
Copyright Year	2014
Abstract	The effects of basicity and MgO content on the viscosity of SiO$_{2}$-CaO-MgO-9wt%Al$_{2}$O$_{3}$ slags with basicity from 0.4 to 1.0 and MgO content from 13wt% to 19wt% were investigated using the rotating cylinder method. A correlation between the viscosity and the slag structure was determined by Fourier transform infrared (FTIR) spectroscopy. It is indicated that the complex network structure of the slag melt is depolymerized into simpler network units with increasing basicity or MgO content, resulting in a continuous decrease in viscosity of the slag. The viscosity is strongly dependent on the combined action of basic oxide components in the slag. Under the present experimental conditions, increasing the basicity is found to be more effective than increasing the MgO content in decreasing the viscosity of the slag. At higher temperatures, the increase of basicity or MgO content does not appreciably decrease the viscosity of the slag, as it does at lower temperatures. The calculated activation energy of viscous flow is between 154 and 200 kJ·mol$^{−1}$, which decreases with an increase in basicity from 0.4 to 1.0 at a fixed MgO content in the range of 13wt% to 19wt%.
Starting Page	353
Ending Page	362
Page Count	10
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	21
Issue Number	4
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2014-04-08
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	slags viscosity basicity magnesia activation energy Fourier transform infrared spectroscopy Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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