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.
Materials,
Journal Year:
2023,
Volume and Issue:
16(20), P. 6632 - 6632
Published: Oct. 10, 2023
Civilization
and
technical
progress
are
not
possible
without
energy.
Dynamic
economic
growth
translates
into
a
systematic
increase
in
demand
for
electricity.
Ensuring
the
continuity
reliability
of
electricity
supplies
is
one
most
important
aspects
energy
security
highly
developed
countries.
Growing
consumption
results
only
need
to
build
new
power
plants
but
also
expand
transmission
capacity.
Therefore,
large
quantities
electric
cables
produced
all
over
world,
after
some
time,
they
largely
become
waste.
Recycling
focuses
on
recovery
metals,
mainly
copper
aluminum,
while
polymer
insulation
often
considered
waste
ends
up
landfills.
Currently,
more
stringent
regulations
being
introduced,
environmental
ones,
which
require
maximizing
reduction
This
article
provides
literature
review
cable
recycling,
presenting
advantages
disadvantages
various
recycling
methods,
including
mechanical
material
recycling.
It
has
been
found
that
currently,
there
very
possibilities
cables,
intensive
scientific
work
carried
out
their
development,
consistent
with
global
climate
policy.
Flexible Services and Manufacturing Journal,
Journal Year:
2023,
Volume and Issue:
36(2), P. 599 - 667
Published: June 10, 2023
Within
an
uncertain
environment
and
following
carbon
trade
policies,
this
study
uses
the
Extended
Exergy
Accounting
(EEA)
method
for
coal
supply
chains
(SCs)
in
eight
of
world's
most
significant
consuming
countries.
The
purpose
is
to
improve
sustainability
SCs
terms
Joules
rather
than
money
while
considering
economic,
environmental,
social
aspects.
This
model
a
multi-product
economic
production
quantity
(EPQ)
with
single-vendor
multi-buyer
shortage
as
backorder.
SC,
there
are
some
real
constraints,
such
inventory
turnover
ratio,
waste
disposal
environment,
dioxide
emissions,
available
budgets
customers.
For
optimization
purposes,
three
recent
metaheuristic
algorithms,
including
Ant
Lion
Optimizer,
Optimization
Algorithm,
Whale
suggested
determine
near-optimum
solution
"exergy
fuzzy
nonlinear
integer-programming
(EFNIP)."
Moreover,
exact
(GAMS)
employed
validate
results
algorithms.
Additionally,
sensitivity
analyses
different
percentages
exergy
parameters,
capital,
labor,
environmental
remediation,
done
gain
deeper
understanding
improvement
SCs.
showed
that
sustainable
SC
USA
has
lowest
total
exergy,
Poland
China
have
highest.
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.
