Chemical Engineering & Technology,
Journal Year:
2023,
Volume and Issue:
46(8), P. 1619 - 1629
Published: May 16, 2023
Abstract
An
experimental
evaluation
of
the
flow
field
on
two
high‐gravity
spiral
concentrators
is
presented
along
with
analytical
solutions.
A
digital
depth
gauge
was
used
to
measure
liquid
level
troughs.
The
tracer
particle
trajectories
and
free
surface
velocity
a
were
determined
high‐speed
camera.
increase
in
rate
leads
an
trough
surface.
Three
full
turns
high
gravity
concentrator
are
sufficient
for
achieving
stabilized
flow.
High‐gravity
spirals
show
lower
depths
velocities
but
steeper
outer
zone
than
low‐gravity
spirals.
Higher
contribute
larger
circulation
zones,
which
eventually
help
greater
separation
heavier
minerals
from
gangue
particles.
Environmental Technology Reviews,
Journal Year:
2024,
Volume and Issue:
13(1), P. 325 - 343
Published: April 24, 2024
The
management
of
oil-contaminated
water
and
wastewater
in
the
oil
industry
remains
a
critical
challenge
due
to
its
environmental
economic
implications.
This
manuscript
provides
comprehensive
review
separation
removal
techniques
for
from
wastewater.
It
gives
an
overview
origins
compositions
wastewater,
including
natural
anthropogenic
sources,
as
well
variations
physical
states
such
free,
emulsified,
dissolved
oil.
delves
into
various
methods,
ranging
traditional
gravity-based
advanced
technologies
like
membranes
recent
developments
treatment
systems.
Furthermore,
it
discusses
application
new
specifically
designed
unique
challenges
faced
Middle
East
fields.
explores
factors
influencing
oil-water
efficiency,
operating
conditions,
chemical
additives,
equipment
design,
considerations.
Additionally,
highlights
current
aspects
future
directions
oily
treatment,
emphasizing
need
sustainable
effective
solutions
industry.
Applied Sciences,
Journal Year:
2023,
Volume and Issue:
13(14), P. 8364 - 8364
Published: July 19, 2023
Rare
earth
minerals
(REMs)
contain
rare
elements
(REEs)
that
are
important
in
modern
technologies
due
to
their
unique
magnetic,
phosphorescent,
and
catalytic
properties.
However,
REMs
not
only
non-renewable
resources
but
also
non-uniformly
distributed
on
the
Earth’s
crust,
so
processing
of
REE-bearing
secondary
via
recycling
is
one
potential
route
ensure
long-term
sustainability
REE
supply.
Flotation—a
method
separates
materials
based
differences
surface
wettability—is
a
process
applied
for
both
mineral
REEs,
especially
when
particles
fine
and/or
high-purity
product
required.
In
this
review,
studies
about
flotation
from
2012
2021
were
systematically
reviewed
using
PRISMA
guideline.
It
was
found
most
REM
research
works
focused
finding
better
collectors
depressants
while,
recycling,
advanced
techniques
like
froth
flotation,
ion
solvent
sublation,
electroflotation,
adsorbing
colloid
with
an
emphasis
recovery
dissolved
REEs
aqueous
solutions
dominated.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(8), P. 3156 - 3156
Published: April 10, 2024
The
selection
of
the
optimal
equipment
for
discontinuous
haulage
systems
is
one
most
important
decisions
that
need
to
be
made
when
an
open-pit
mine
designed.
There
are
a
number
influencing
factors,
including
natural
(geological
and
environmental),
technical,
economic,
social.
Some
them
can
expressed
numerically,
in
certain
units
measure,
while
others
descriptive
stated
by
linguistic
variables
depending
on
circumstances
project.
These
factors
characterized
high
level
uncertainty,
associated
with
both
exploration
mining
operations.
experience,
knowledge,
expert
judgment
engineers
specialists
key
importance
management
processes,
consistent
issues
stemming
from
dynamic
expansion
mines
space
over
time.
This
paper
proposes
integrated
model
translates
all
criteria
affect
solution
into
variables.
By
employing
multiple-criteria
decision-making
method
combining
it
fuzzy
logic,
we
developed
algorithm
addresses
above-mentioned
uncertainties
inherent
various
processes
where
experience
experts
forms
basis.
analytic
hierarchy
process
used
order
deal
trending
decision
problems,
such
as
system
selection.
entire
was
applied
real
case
study—the
Ugljevik
East
1
mine.
Physicochemical Problems of Mineral Processing,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 12, 2025
This
paper
presents
the
results
of
Multi-Criteria
Decision
Making
(MCDM)
methods
for
determining
optimal
separation
density
in
gravity
anthracite
coal,
and
also
suggests
an
appropriate
MCDM
model
this
purpose.
Five
densities
were
selected
as
output
seven
coal
washability
indices
used
input
based
on
coal.
The
SAW,
TOPSIS,
WASPAS,
WISP,
CoCoSo
study.
evaluation
five
averaged
a
new
index.
Finally,
alternative
A4
(i.e.,
is
1650
kg/m<sup>3</sup>)
was
final
density.
