Concentration of Ores : Froth Floatation (Part - 4) - Isolation of Elements, Chemistry, Class 12 Video Lecture

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now I will discuss another method for
concentration of in fact sulphide note
which is used to concentrate sulphide
ores and this method is called froth
flotation process in fact we stir it
about this method in the previous
chapter surface chemistry shipped this
method is used to remove Yankee
particles from sulphide ores please note
this is used only for sulfide hole the
process is really simple this is my raw
or raw sulphide ore I'll say this is my
input and we mix the whey powder it
powder it and then we mix it water this
is my water
now the sulfide ores if you mix in water
it becomes wet right but we do not want
it to become so much great so we will
add something called collectors so we'll
add something called collectors so what
collectors will do is it will enhance
the non wettability of the sulphide
particles and the collectors examples
are my pine oil or fatty acid so these
are my collectors
so I will use this character so that the
particles that sulphide particles should
not get that much red because we are now
putting this in the water okay
also here you know we we this is froth
right so we should try to maximize this
flow and we can maximize this fraud by
using froth stabilizers we have
something called froth strength either
so this thought stabilizers will try to
make sure that you get more and more
fraud correct and froth stabilizers
examples can make resolves and lean
these are my example of froth
stabilizers okay so what we do here is
we take the raw sulfide ocean and then
we order it first thing is we pod right
we powder it and then we add water right
and we also add collectors so that my
sulfide or particles it does not get
that much weight example of correct
collectors of final and fatty acid we
also add fraud stabilizers so that we
get more and more rock right and now
what happens is the sulphide particles
actually cling or stick to this frog so
you see this blue one small very light
blue ones are the sulphide particles
they stick to the front since they stick
to the froth and you collect the froth
in another container so this area has
myself.i particles and then you can try
to get the sulphide ores back so what
you get is a concentrated sulfide oh and
that's why this process is called
concentration of sulphide ore it has
froth flotation process alright so see
your only logic is the the sulphide
particles get stick to the froth and we
collect
SWAT somewhere else to get highly
concentrated sulphide ore but to achieve
this what we are doing is we are adding
collectors so the sulphide ore doesn't
get wet and we are adding frost
stabilizers to get more and move from
and the impurities if you see settle
down because the impurities are
generally heavier and they settle down
and it is collected so to give more and
move throughout what we do is we pass
air from this pipe now if you pass in
more and more air from this pipe and
this whole thing rotates if this thing
rotates you get more and move from to be
elegant rise in your home you put some
you take a bucket of water and put
detergent you'll not get froth but if
you just try to shake that water then
you see more low froth coming up the
same thing we are doing here this whole
thing rotates and creates motion and
this air these combination of air and
this motion creates more flow correct so
as I in toward this rotating paddle this
is my paddle actually so this is a
rotating paddle this agitates the whole
mixture and this draws air from this
pipe and creates more thought and
throught this light we know that froth
is light this is light light very light
so this is light it can be easily
skimmed off right and we are collecting
it here and then it can be dried and the
concentrated sulphide ores are recovered
from now the question is if you have
linty quotient so in this scenario what
we discussed was we had let's suppose
PBS and we had stone we had iron we have
let suppose a clay these were my angry
particles right so we use for protection
process and this
stick to fraud and these set it down as
it were it is correct this is a normal
scenario but what if we have a self a to
sulphide or mixture for example I have
Jaden s and PBS would so I have a hole
which I got from the earth and these
this poor has PBS Jed earnest and plug
the input is also another input in
physical clay and it's Philippi 203 now
you want to separate them so if you use
the normal cross petition process what
will happen is these both these
particles will stick to throttle right
and these particle build on but you want
to separate these two also so these can
be done by adjusting the preparation of
the proportion of oil and water if you
see we are using oil so to separate the
sine Omega course the first method can
be we can add just the oil proportion so
with that only one of these will get
stick or the better way is using dip
presence I don't I'll tell you about the
presence this is a better way actually
if you use depressants they can then we
can easily separate them what depression
does is they present will allow only one
of these particle to stick to froth why
because it will react with other
particle for example in this case in
this case if I use to present as any CN
in this case I have zinc sulfide and
lead sulfide estores and I use na seen
as a depressant what NaCl will do any CN
will prevent zinc sulphide to mix with
one but it will allow PBS that is lead
sulfide to mix the froth so with this if
you see in the spot will have only
let's away because they will react
actually and they won't inform complex
and it will not it will not stick to
throught correct so if you have menus
like this where you have two different
sulfides
and you want to separate them you can
use the present that's the best way
because this depressant will react with
one of these former complex and that not
stick to the thrall for the other one
the surf ID will stick to draw so you
have to select a proper depressant based
on your whole type okay now I tell you a
very encouraging story it's a wash of
months to it see the whole idea of the
froth flotation process came from a
washerman so there is a washer man and
she had innovative mind
she was very innovative so and her
clients where these are the headlines
the client one and these are also
headlined clients or customer you can
say right she had various kind then one
minor and one chemist
this guy is a chemist this is a minor so
he had mine headlines he had a chemist
client or she had a minor customer or
she had a famous customer so while
washing - clothes because see if minor
his a client's he has to wash your
clothes right so while washing a minor
clothes he noticed one day that the sand
and other dirt particles fell to the
bottom of the washed up example this is
a wash term which she was using cz and
she found that all this sand and other
particles they said long in the washtub
where which she has got from the clothes
let's suppose there was a clothes here
right this is a clothes
from this cloth these particles are to
town that is okay but what was
surprising was that the copper bearing
compound that again came from the cloth
or the miner they were in caught up in
the rocks this is the froth hair because
using so so all these copper bearing
particles Elsa
so these copper bearing particles we're
caught up in froth or you'll say in soap
suds Rachel is fraud in this froth all
the copper meaning vordigan sphere cut
off in sequence it was surprised why
some particles are stuck up in the Frog
other particles are in the bottom so she
explained the whole scenario about this
minor cloth to her kima's client and the
chemist mind was mr. Kerry eversion so
Kerry version use this idea actually two
separate copper compound from the rock
earth metal on a large scale because
this was the copper compound use this
idea and to separate copper and with
this we came up with the process of
froth flotation process so with this
this whole froth flotation process came
into picture right and this it was used
to extract open from even a low quality
coal copper mine became profitable
copper price came down right and the
copper production scaled up in the world
with that it leads florid development
because copper is used in the
development we know that copper steel
these are used the copper production
shut up
price right now because of this process
and this leads to the development so you
see everything's Sutton washed a man
we give ready to mr. Cary Haitian but
again the washing line also gets a curly
so with this the idea behind the main
reason why I'm telling the story is
anyone can think so it is innovative
mind which brings change thank you
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