Ironmaking & Steelmaking Processes Products and Applications,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 19, 2024
To
monitor
and
diagnose
the
erosion
status
of
blast
furnace
hearth
lining
during
operation,
this
study
utilises
high
precision
rapid
processing
capabilities
ANSYS
finite
element
software
for
secondary
development.
It
integrates
temperature
data
from
various
thermocouples
at
bottom
with
samples
thickness
calculation,
developing
a
model
based
on
extensive
datasets
status.
This
can
display
isotherms
any
user-specified
combines
calculated
longitudinal
profile
to
create
three-dimensional
representation
through
development
Solidworks
3D
modeling
software.
flexibility
allows
an
arbitrary
view
furnace's
state.
method
significantly
enhances
both
speed
accuracy
calculations
compared
other
models.
addresses
challenge
constructing
reliable
heat
transfer
when
numerous
fail
in
later
stages
operation.
By
improving
model's
applicability
throughout
entire
lifecycle
furnace,
it
ensures
real-time
feedback
users
by
continuously
calculating
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
24, С. 8473 - 8486
Опубликована: Май 1, 2023
Chromium-containing
refractories
have
excellent
high-temperature
corrosion
resistance.
In
this
work,
Cr2O3
reinforced
Al2O3–SiO2
composite
were
prepared
by
reaction
sintering
process.
The
microstructure,
phase
composition,
mechanical
properties
and
strengthening
mechanism
of
the
investigated.
results
show
that
when
content
is
10–20
wt%,
composites
are
mainly
composed
Cr-mullite
(Al3.94Cr0.50Si1.56O10.44),
(Al,
Cr)2O3,
a
small
amount
SiO2
phase.
When
exceeds
20%,
consist
Cr)2O3
phases.
appropriate
can
effectively
enhance
compactness
composites.
This
due
to
formation
Cr
doped
mullite
phases,
which
reduces
temperature
ceramics
improves
its
density
properties.
highest
hardness
(27.03
GPa),
flexural
strength
(213.21
MPa)
compressive
(528
values
observed
at
20
wt%.
However,
excessive
addition
will
deteriorate
large
solid
solution
increase
porosity
composites,
reduce
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
25, С. 5520 - 5537
Опубликована: Июль 1, 2023
Al2O3-Cr2O3
refractories
have
excellent
slag
corrosion
resistance
and
can
adapt
to
the
oxidation/reduction
atmosphere
in
smelting
reduction
ironmaking
furnace.
Improving
of
chrome
corundum
is
great
significance
for
extending
life
length
industrial
kilns
decreasing
carbon
emissions.
In
this
work,
influences
ZrO2
content
on
phase
evolution,
microstructure,
physicochemical
properties,
mechanical
properties
reinforced
composite
were
investigated.
The
results
show
that
composites
are
primarily
composed
(Al,
Cr)2O3
solid
solution
m-ZrO2.
compressive
strength,
flexural
strength
hardness
be
improved
by
adding
2.5
wt.%
ZrO2.
However,
more
will
reduce
its
properties.
This
due
excessive
augement
porosity
refractories,
transformation
also
lead
formation
microcracks
during
cooling
process.
It
worth
noting
higher
improves
thermal
shock
composites,
which
put
down
microcrack
toughening
mechanism
tests
thicknesses
infiltration
layers
significantly
decreased
accompanied
increase.
because
high
melting
point
CaZr4O9
reduces
CaO
alkalinity,
inhibits
dissolution
Al2O3
into
a
certain
extent.
Therefore,
corrosion/penetration
obviously
with
increase
addition.
Materials,
Год журнала:
2025,
Номер
18(3), С. 470 - 470
Опубликована: Янв. 21, 2025
Corundum–mullite
refractory
material
is
an
important
in
rotary
kiln
incinerators
due
to
its
excellent
properties,
e.g.,
high
temperature
stability
and
chemical
resistance,
etc.
However,
the
process
of
use,
complexity
sintering
will
inevitably
produce
a
large
amount
spent
corundum–mullite
material.
Therefore,
it
study
failure
mechanism
prolong
service
life.
In
this
manuscript,
scrapping
for
was
studied
by
XRD,
XPS,
SEM-EDS,
FTIR,
The
results
indicate
that
corrosion
caused
impurity
elements,
such
as
Fe,
Ca,
Mg,
Ti,
etc.,
one
mechanisms.
corundum
structure
remains
stable
throughout
life,
while
mullite
exhibits
opposite
phenomenon.
Al-O-Si
bonds
are
depolymerized
elements
release
free
tetrahedral
structures,
including
[AlO4]
tetrahedron
[SiO4]
tetrahedron.
intervention
iron,
tetrahedra,
[AlO4],
[FeO4],
can
bond
with
each
other
sharing
bridging
oxygen
(BO),
probably
forming
Fe-O(BO)-Si,
Fe-O(BO)-Al,
Al-O(BO)-Si
Al2O3-SiO2-Fe2O3-MexOy
(Me
=
etc.)-based
amorphous
phase.
These
findings
provide
theoretical
support
prolonging
life
materials
incinerators.
