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possible.
30
oxidation
can
proceed
more
rapidly
;
of
hydration.
The
of
sulphur
from
copper
for the
leave much of
usually
occurs
Copper
ores
containing
nickel
usually
contain
also
magnetic
and
iron
pyrites,
and
solvent.
Its
weight
in
Cripple
Creek
ores,
due
to
roasting,
is
usually
from
5
to
7
per
cent.,
based
on
the
control
samples.
temperature,
antimony
in
large
amounts,
much
of
the
silver
may
process
is
employed
to
extract
copper
or
silver,
volatile,
while
the
sulphate
remains
indifferent.
In
the
roasted
ore,
with it
to form
directly
per
ton
of
ore,
and
got
satisfactory
results.
Ordinarily,
the
amount
of
salt
for
silver
ores
will
vary
between
1
and
5
per
cent.,
although
much
greater
percentages
than
white
volatilized
when
roasted
Three
such
furnaces
would
cost
furnace
atmosphere
reducing,
instead
of
highly
oxidizing,
and
the
object
of
roasting
would
be
largely
defeated.
required
during
this
stage
by
hydrometallur-
the
alternately
within
and
long
have
arch,
inside
measurements,
is
16
1/2
in.,
and
9
in.
rabbling
mechanism
and
the
drive
therefor.
The
furnace
is
adjusted
vertically
at
type.
This
type
has
two
grates
at
the
bottom,
each
having
an
area
of
29
sq.
ft.
or
a
total
area
can
be
changed
easily
and
without
losing
heat
in
the
furnace.
The
arms
are
each arm
discharging
of
the
ore,
but
this
the
other.
That
one-third
portion
of
the
cylinder
nearest
fire
brick
into
the
furnace
has
its
sulphur
fairly
well
eliminated
before
it
comes
against
the
more
or
get
the
maximum
sulphur
a
reverberatory
chamber
in
which
the
fumes
1400
to
1500
F.
The
temperature
of
last 200 ft.
more
readily
soluble
in
dilute
hydrochloric
ordinary
use
as
ordinary
cast-refined
copper.
Cathode
copper
is
red heat.
at
Degrees
C.
hours
the
copper
was
successfully
extracted.
commercial
applicability
The
ore,
after
roast-
ing,
may
be
treated
with
the
acid
so
produced,
to
extract
the
copper,
liquor
or the
oxidized and
roasted ores.
If the
to leave
no more
brings
the
copper
foundation,
and
have
masonry
walls,
covered
with
4
in.
of
concrete,
then
1
in.
of
reinforced
asphalt.
The
asphalt
covering
has
lasted
successfully
for
2
years
and
water.
 Only
very
small
sulphate
solution
accomplished
a
very
complete
extraction
of
the
copper
when
it
precipita-
tion
is
much
sulphuric
acid
combined
with
the
same
amount
acid with
the
cost
is
considerable.
If
10
reaction
takes
place
flues,
all
parts
of
to take
to
spread
through
the
heap.
The
surface
gradually
shows
a
brownish
coloration,
due
to
the
dehydration
of
reservoirs
profitable application,
content,
precipitant,
large
to
some
extent
in
developed
by
the
oxidation
of
the
sulphur
permitted.
No
8/18/2019 hydrometallurgy del cu.pdf
ing
filters,
into
which
the
former
hydrochloric
acid
quite widely
pyritic
residues
in
smelting
for
iron
into tram
drop
is
put
precipitation
boxes;
Percentage
of
copper
removed
copper.
Lime.
Lime,
calcium
hydrate
or
milk
of
lime,
is
not
precipitating
copper
from
cupric
and
cuprous
chloride
solutions,
calcium
chloride
being
produced.
Milk
of
lime
precipitates
cupric
hydrate
from
cupric
chloride,
and
cuprous
oxide
from
cuprous
of
the
electrolyte,
has
in
figuring
the
energy
efficiency
for
any
particular
process,
when
such
reactions
are
involved.
the
joints
in
the
main
bars
solvent to
siderable
sulphur
dioxide
stirrers,
which
agitate
the
solution
during
possible
reactions
with
base
materially
reduces
the
voltage
necessary
solution
grm.
of
copper
per
liter
(1
1/2
Ib.
per
gallon)
in
consequence
grm.
of
solution
of
cupric
chloride
on
cuprifer-
ous
pyrites
and
pyrrhotite
caused
a
dry.
The
agitation
copper by bringing
absorption
acid,
which
cuprous
chloride
of
acid
has
been
regenerated.
This
excess
is
consumed
by
the
base
elements
in
the
ore,
and
acid,
the
chlorine
will
the
sulphur.
The
temperature
is
the
main
consideration
in
determining
the
size
of
the
transformer.
It
is
makes
oxychloride.
The
anhydrous
solubility
of
the
cyanides
of
gold,
silver,
and
copper,
and
other
base
metals
in
ammonia.
In
the
treatment
of
extraction
was
almost
complete.
With
slimes
present
in
sufficient
quantity
or
unevenly
distributed
through
the
sands
will
usually
be
no
trouble
in
extracting
it
with
the
copper,
the
year
1886,
the
tailings
from
14,000
an
alkaline
or
neutral
unsatisfactory
deposit,
namely,
one
Neutral concentrated
with
some
of
the
chlorine
gas
from
multiple
system
was
used,
as
in
the
copper
cells.
They
differed
from
the
latter
containing
the
nickel-
copper
shot;
only
(15.97)
precipitation
right
of
precipitation,
and
mine
Phosphor-
ibronze
castings
were
thick coat
it,
but
care
well at
effected
in
the
towers
than
in
the
launders.
This
is
especially
noticeable
where
the
solution
is
both
weak
in
subsequently
bessem-
erized,
thus
effectively
removing
the
arsenic,
antimony,
and
bismuth
they
contain.
a minimum.
beginning
of
the
refining
operation
and
oxidize
the
metal
again
to
set
copper.
The
fact
that
molten
copper
the
long
sides,
and
is
met
in
addition
by
an
air
well,
and
during
the
tapping
a
pole
of
green
wood
is
held
under
the
stream
of
molten
copper,
which
granulates
it
sufficiently
really
dissolving
of
the
roasted
matte
is
performed,
inasmuch
as
the
roasted
conduct the
be
extracted
by
dilute
sulphuric
acid;
about
75
per
cent,
of
pipes
to
expand
freely,
and
they
retained
their
straight
position.
Close
to
the
end
of
the
evaporating
tank
and
resting
on
the
iron the
with
2
1/2-in.
planks,
which
should
be
bolted
FIG.
85.
Reinforced
concrete
tank.
each
section,
small
very
buoyant,
and
as
it
expands,
forms
large
bubbles,
which
act
more
drop
gives
20
ft.,
which
stoneware,
bolted
together
and
strengthened
If
copper
ores
contain
precious
metals
which
may
be
press
has
become
clogged
or
slow
in
filtering,
the
solution
inlet
8/18/2019 hydrometallurgy del cu.pdf
p. plant,
05
00
OrHNCONOCiCqcNC^OO^N'N
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f-iJ
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deny.
Many
of
the
defects
in
the
earlier
electrolytic
processes
ton
of
iron,
and
any
local
accumu-
lation,
either
of
tin
cans
or
sulphuric
acid
is
cheaply

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