Green
Synthesis
and
Dust
Suppression
Mechanism
of
Molasses-based
Foam
Dust
Suppressant
MA Hongtao GUAN Yantai LIU Jianfeng ZHI Rongzhen SUN Fengrong GUO Kun WANG Jie ZI Wei YAO Chuanping ZHAO Xinyi ZHAO Mengrou ,
2025, 54(8):
209-217.
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23 )
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In
order
to
prevent
and
control
issues
such
as
pneumoconiosis
and
air
pollution
caused
by
coal
dust,following
the
principle
of
" controlling
dust
with
waste" ,a
molasses-based
foam
dust
suppressant
was
prepared
using
molasses,a
by-product
of
the
sugar
industry. The
molasses-based
foam
dust
suppressant
(TM-CMCS / RC)
was
obtained
through
mechanical
stirring
and
foaming
after
adding
carboxymethyl
chitosan
(CMCS)
as
water-retaining
agent,rhamnolipid
(RL)
as
wetting
agent,
and
cocamidopropyl
betaine
(CAPB)
as
foaming
agent
to
the
binder
molasses
solution
(TM). The
orthogonal
experiment
was
used
to
optimize
the
ratio,the
performance
was
tested
by
experiments
such
as
contact
angle,solidified
layer
hardness,and
dust
suppression
efficiency,the
structure
was
analyzed
by
characterization
methods
such
as
FT-IR,SEM,and
thermogravimetry,and
molecular
dynamics
simulation
was
carried
out
using
Materials
Studio
software. The
experimental
results
showed
that
after
treatment
with
the
dust
suppressant,the
hydroxyl
content
on
the
surface
of
the
coal
sample
increases,and
the
hydrophilicity
is
enhanced.
The
gaps
and
cracks
between
coal
dust
are
filled,forming
a
dense
solidified
layer. The
dust
suppressant
has
good
thermal
stability,and
its
internal
structure
remains
stable
in
the
extreme
environment
of
open-pit
coal
mines. The
contact
angle
of
the
dust
suppressant
is
35. 28°,indicating
good
wettability. The
compressive
strength
of
the
solidified
layer
reaches
53. 56
kPa,
which
can
effectively
resist
wind
erosion. When
the
wind
speed
is
12
m/ s,the
dust
fixation
rate
is
still
over
90%,and
the
dust
suppression
effect
is
significantly
better
than
that
of
other
comparative
samples,meeting
the
actual
requirements
of
coal
dust control
in
open-pit
coal
mines. The
results
of
molecular
dynamics
simulation
showed
that
compared
with
the
water/ coal
system,
the
thickness
of
the
adsorption
layer
at
the
coal-water
interface
in
the
dust
suppressant / coal
system
increases
by
4×10
-10
m,
and
the
diffusion
coefficient
D
of
water
decreases,indicating
that
the
dust
suppressant
enhances
the
wetting
and
adsorption
ability
to
coal
molecules. The
dust
suppressant
is
environmentally
friendly,biodegradable,and
easy
to
prepare,making
it
highly
significant
for
coal
dust
control
and
the
sustainable
development
of
coal
mining.
