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@ARTICLE{Mller:844852,
author = {Müller, M. and Seebold, S. and Wu, G. and Yazhenskikh, E.
and Jantzen, T. and Hack, K.},
title = {{E}xperimental {I}nvestigation and {M}odeling of the
{V}iscosity of {O}xide {S}lag {S}ystems},
journal = {Journal of sustainable metallurgy},
volume = {4},
number = {1},
issn = {2199-3831},
address = {Berlin},
publisher = {Springer},
reportid = {FZJ-2018-02203},
pages = {3 - 14},
year = {2018},
abstract = {Numerous technical applications in the energy and
metallurgical industries demand a fundamental knowledge of
the flow of slags. Besides temperature and composition,
which determine the internal structure of an oxide melt,
crystallization in the slag significantly influences its
flow behavior. Therefore, not only the temperature-dependent
viscosity of fully liquid oxide melts was determined using a
rotational high-temperature viscometer but also isothermal
viscosity measurements were conducted, in order to examine
the rheological evolution over time caused by
crystallization. The crystallization behavior during flow
can be separated into three time regimes: a lag-time, in
which the undercooled melt behaves as an Arrhenius liquid;
the kinetic-driven crystallization; and, finally, the
rheological equilibrium that is represented by a
time-invariant viscosity plateau. To model the viscosity of
oxide slags, in a first step, a self-consistent
thermodynamic database for the system
SiO2–Al2O3–CaO–MgO–FeO x –K2O–Na2O–P2O5–SO x
has been established. The Gibbs energy of the liquid phase
has been modeled using a non-ideal associate solution
description. In a second step, an Arrhenius-type model for
the calculation of viscosities of fully molten slags has
been developed. The model is based on the same structural
units, i.e., the associates, as the one for the Gibbs energy
of the melt. In a third step, the influence of
crystallization, which not only transforms the liquid into
dispersion but also usually changes the composition of the
residual liquid, on the viscosity is considered.},
cin = {IEK-2},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111)},
pid = {G:(DE-HGF)POF3-111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000427608800002},
doi = {10.1007/s40831-017-0144-2},
url = {https://juser.fz-juelich.de/record/844852},
}