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
steel research international,
Год журнала:
2023,
Номер
94(11)
Опубликована: Июнь 16, 2023
The
brittle
layer
of
carbon
brick
in
a
Chinese
4000
m
3
blast
furnace
hearth
is
investigated
detail,
and
its
formation
mechanism
proposed
correspondingly.
occurrence
form
the
characterized
by
chemical
analysis,
X‐ray
diffraction,
scanning
electron
microscopy–energy
dispersive
spectroscopy.
results
show
that
obvious
harmful
element
(K,
Na,
Zn)
erosion
on
sidewall
observed,
which
Zn
dominant.
K
2
O,
Na
KCl
produced
are
inducement
formation,
ZnO
formed
main
reason
for
formation.
thermal
stress
caused
temperature
gradients
greater
than
bending
strength,
will
increase
microcracks
brick.
has
lower
conductivity
due
to
higher
porosity,
resulting
large
difference.
aggravate
embrittlement
degree.
steel research international,
Год журнала:
2023,
Номер
95(2)
Опубликована: Ноя. 15, 2023
For
complex,
difficult‐to‐control,
and
hour‐delay
blast
furnace
(BF)
systems,
the
quantitative
characterization,
prediction,
adjustment
of
BF
hearth
activity
are
significant
in
improving
status.
In
this
study,
data
including
raw
fuel,
process
operation,
smelting
state,
slag
iron
discharge
during
entire
analyzed,
with
a
total
171
variables
5033
groups
data.
Based
on
knowledge
technology,
comprehensive
index
is
then
proposed
to
quantitatively
characterize
grade
level
hearth;
rationality
method
verified
from
two
aspects
heat
status
coincidence.
Compared
traditional
single‐machine
learning
algorithm,
performance
that
combines
genetic
algorithm
stacking
exhibits
improvement.
The
hit
rates
for
10%
5%
errors
prediction
estimation
94.64%
80.36%,
respectively.
To
enhance
activity,
quantized
dynamic
actions
suggestions
also
simultaneously
pushed.
model
successfully
applied
practical
online
production.
During
application
period,
average
increases
by
compared
historical
value.
steel research international,
Год журнала:
2024,
Номер
95(6)
Опубликована: Март 13, 2024
Analyzing
the
wetting
behavior
between
carbon
brick
and
molten
iron
in
a
blast
furnace
is
crucial
for
understanding
prolonging
furnace's
lifespan.
This
study
investigates
microporous
iron.
The
contact
angle
measured
at
various
temperatures
saturation
conditions,
while
microscopic
morphology
of
reacted
interface
examined.
Furthermore,
mechanism
on
surface
elucidated.
findings
reveal
that
both
remain
never‐wetting
state
within
furnace.
As
temperature
rises
from
1150
to
1450
°C,
decreases
138°
128°,
whereas
initial
content
increases
2.6
wt%
4.1
wt%.
Additionally,
angles
gradually
increase
128.3°
133.6°,
with
final
equilibrium
119.2°
127.0°,
indicating
nonwetting
state.
dissolution
reaction
occurs
matrix
region
prior
Conversely,
presence
ceramic
phase
area
hampers
chemical
erosion
physical
penetration
International Journal of Applied Ceramic Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 11, 2024
Abstract
Chromium–corundum,
as
a
common
refractory
material,
is
broadly
applied
in
high‐temperature
kilns
due
to
its
superior
thermal
stability
and
high
melting
point.
Unfortunately,
this
susceptible
corrosion
destruction
under
extreme
furnace
conditions
by
chemical
erosion,
mechanical
wear,
shock,
which
significantly
shortens
useful
life.
Accordingly,
recent
years,
the
issue
of
how
improve
slag
resistance,
mechanical,
sintering
properties
chromium–corundum
refractories
has
aroused
widespread
attention.
In
work,
behavior
application
status
Ausmelt
furnace,
waste
incinerator,
coal
water
slurry
gasifier,
HImelt
reduction
are
analyzed
discussed.
To
service
life
refractories,
enhancement
method
mechanism
performance,
properties,
shock
resistance
also
summarized.
Finally,
some
suggestions
prospects
made
for
longevity
refractories.
Metallurgical Research & Technology,
Год журнала:
2023,
Номер
120(2), С. 216 - 216
Опубликована: Янв. 1, 2023
Excellent
performance
of
refractories
in
blast
furnace
hearth
is
one
the
important
factors
to
ensure
longevity
furnaces.
As
an
emerging
refractory
for
application
furnace,
alumina-carbon
composite
brick
combines
superior
properties
carbon
and
alumina.
Firstly,
thermal
conductivity
was
measured
by
laser
flash
method
new
device
verify
feasibility
measurement.
Secondly,
influence
heating
temperature
cooling
water
flow
on
brick,
comparison
corundum
were
investigated
confirm
heat
transfer
mechanism
brick.
High
erosion
resistance
slag
hot
metal
are
consequent
from:
(a)
reasonable
composition
combination
Al
2
O
3
,
C,
SiO
SiC,
etc.,
(b)
dense
structure,
small
pore
diameter,
uniform
distribution
pores,
(c)
generated
SiC
whiskers
6
Si
13
which
can
fill
pores
reduce
porosity.
Finally,
analysis
phase
a
dissected
performed
illustrate
relationship
between
