Recycling,
Год журнала:
2025,
Номер
10(1), С. 26 - 26
Опубликована: Фев. 14, 2025
Electrolytic
manganese
metal
(EMM)
produced
from
recyclable
resources
has
recently
gained
increasing
attention
due
to
the
scarcity
of
high-quality
natural
and
its
broad
range
applications.
This
review
summarised
recent
progress
in
recovery
techniques,
including
pyrometallurgy
hydrometallurgy.
It
also
critically
assessed
processes
mechanisms
involved
electrodeposition
for
Mn
chloride-
sulphate-based
systems,
with
a
major
focus
on
electrode
reactions
nucleation
growth.
The
key
optimisation
factors
influencing
electrodeposition,
such
as
electrolytes,
power
consumption,
additives,
cell
structures,
materials,
were
analysed,
particular
their
impact
current
efficiency,
specific
energy
product
quality.
research
directions
highlighted
address
practical
challenges
enhance
sustainability
EMM
process,
which
mainly
includes
improving
ecological
outcomes
reducing
both
operating
investment
costs.
Promising
strategies
simultaneous
production
electrolytic
dioxide
(EMD)
identified,
comprised
applying
membrane
technology,
ionic
liquids,
recycling
reusing
waste
exploring
hybrid
techniques.
results
this
study
showed
that
prospective
approaches
are
driven
by
need
reduce
costs,
improve
quality
through
sustainable
technological
advancements.
can
be
used
comprehensive
guide
scientific
communities.
Minerals,
Год журнала:
2025,
Номер
15(3), С. 304 - 304
Опубликована: Март 15, 2025
The
conventional
manganese
carbonate
preparation
process
faces
challenges
such
as
low
resource
utilization
efficiency
and
difficulties
in
treating
by-product
Mg-containing
ammonium
sulfate
solution.
In
this
study,
a
two-stage
leaching
was
developed
to
efficiently
extract
Mn
Mg
from
the
ore.
NH4HCO3
used
precipitant
convert
Mn2+
leachate
MnCO3,
achieving
precipitation
of
99.89%,
resulting
product
contained
44.45%
Mn,
meeting
first-class
indicators
HG/T
4203-2011
(Chinese
standard
on
for
industrial
use).
To
further
enhance
utilization,
combined
stripping–adsorption
designed
treat
solution
generated
during
carbonization
process.
Subsequently,
economically
valuable
gypsum
magnesium
oxide
products
were
prepared.
Additionally,
88.20%
NH3
stripped
recycled
prepare
then
carbonization.
Finally,
purified
free
ammonia
nitrogen
obtained
using
001×7
resin
dynamically
adsorb
filtrates
stripping
process,
maximum
adsorption
capacity
51.14
mg/g.
This
provides
novel
approach
clean
production
industry.
Buildings,
Год журнала:
2025,
Номер
15(10), С. 1586 - 1586
Опубликована: Май 8, 2025
This
study
aims
to
enhance
the
sustainable
utilization
of
electrolytic
manganese
residue
(EMR),
an
industrial
solid
waste
rich
in
sulfates
and
pollutants,
by
modifying
it
with
appropriate
proportions
granulated
blast
furnace
slag
(GBFS)
carbide
(CS)
evaluating
its
potential
as
a
cement
retarder.
The
influence
both
GBFS/CS
ratio
dosage
modified
EMR
on
performance
mortar
was
systematically
investigated,
focusing
workability,
mechanical
properties,
hydration
behavior,
leaching
toxicity,
carbon
emissions.
Results
showed
that
GBFS
CS
significantly
reduced
pollutant
concentrations
while
improving
gypsum
crystallinity.
Modified
exhibited
retarding
extending
initial
final
setting
times
from
98
min
226
169
298
min.
With
8
wt.%
dosage,
28-day
compressive
strength
reached
58.76
MPa,
1.3-fold
increase
compared
(45.21
MPa).
content
reactive
SiO2,
Al2O3,
Ca(OH)2,
CaSO4·2H2O
promoted
secondary
generated
significant
ettringite
(AFt)
calcium
silicate
hydrate
(C-S-H)
gels,
forming
dense
microstructure.
Pollutants
EMR-cement
were
through
precipitation,
substitution,
encapsulation,
meeting
toxicity
standards.
highlights
feasibility
environmental
benefits
employing
retarder,
demonstrating
building
materials.
