hey guys I’m Nate welcome back to the
dome where today we’re gonna be doing
some experiments using salt and seeing
what happens if we melt it down in our
foundry some other channels have already
done some experiments using molten salt
and I figured it was our turn to give it
a shot so today we’re going to take a
look at melting salt and see what we can
learn about it we’ll see how long it
takes to melt in our foundry and we’ll
see how long it stays a liquid we’ll
take a look at what it looks like when
it is a liquid how thick is it what
color is it and just try and learn what
molten salt is like of course we will
need to be careful because table salt
melts at almost 1500 degrees Fahrenheit
so by the time its liquid is going to be
dangerously hot depending on how our
experiments go today in the future we
may try pouring molten salt into things
onto things or dipping things into the
molten salt itself let’s fire up the
foundry
[Music]
all right our salt is now molten and it
took 17 maybe 18 minutes to get to the
point where it was really nice and
liquid and then we let it sit in our
foundry for just a couple minutes more
to make sure that we really got it up to
temperature now I’ll use the tongs I’ll
take the whole crucible out of the
foundry and I’ll set it on the bottom of
a pot I had turned over that’ll give us
a nice metal base so it will just burn
the ground that it’s sitting on it might
burn some of the coating on my metal pot
but it’s hot it’s a quick demonstration
of how hot this is is just piece of wood
let’s dip that in and see what happens
to it instantly lights on fire let’s try
that again
instantly lights on fire again take the
metal tongs and I dip those in light on
fire but they get coated with salt
pretty nice it’s just a thin layer of
salt built up on the tongs right there
as it cools off it’s still putting off
some orange glow but it’s getting less
and less and I’m starting to be able to
see down through it like I can see the
bottom of the crucible so I think this
stuff is pretty clear in terms of color
that’s a very thin viscosity the way
that moves around in the container it’s
almost water lightly
[Music]
salt is not so liquid once we scoop it
out I think it’s definitely cooling down
now we have almost like a salt slush it
doesn’t look quite as warm but you can
see that it still burns the piece of
wood almost immediately so it is cooler
but it’s not cold let’s pour a little
bit more salt on top of this and throw
it back in the furnace get it back to
nice and runny
[Music]
this time we’ll put the lid on that
might speed up the process the fact that
our crucible is already extremely hot
should also make it go faster over where
we have the foundry inside the dome it’s
actually quite dark there’s not a ton of
light getting and except through the
main door so we’ve moved over here by
the door to get a lot more light because
the salt I don’t think will always be
glowing orange that much you may have
seen that as soon as I took some of the
salt out of the crucible it didn’t look
like it was glowing anymore and I think
it’s just because it was so dark that we
could see that light being put off so to
get a better sense of what it looks like
with normal lighting we’re gonna pour
our salt into this pot over here and see
what color it is see how viscous it is
and just learn about what happens if you
pour it out of the crucible into another
container so just by bringing it over
here into where we have a little bit
more sunlight suddenly the crucible
doesn’t look like it’s all glowing
orange nearly as much it’s still very
warm and it’s still putting off a little
bit of orange color that’s considerably
less all right so now we’ve got our salt
which does still look orange in here but
let’s pour it out into our pot and see
what color it looks there look how thin
and runny that is is the liquid I’m just
gonna pour all of it here we go
there you go that’s not orange anymore
it’s just that really has the
consistency of water or something that’s
so thin wow it is rapidly cooling off
though leave that you can see the salt
forming on the sides it’s getting almost
a slushy consistency already it’s only
been a few seconds and there you go now
it’s starting to form into just crystals
again the stuff that I poured onto the
bottom of the pot cooled down first of
course because it was in contact with
the metal surface and the metal surface
was cool
and it’s cooled down enough and started
to shrink that I think it’s just
completely free it’s not stuck to the
bottom of the pot it’s just a piece of
salt shaking around in there we also
have this one High Point that’s right
where I poured it on and I think because
it was landing right there first sort of
built up a little spot this is pretty
loose let’s see if we can tip the whole
thing out
seems to come off our pot completely
somewhat smooth on the bottom pretty
rough on the top we can see that it no
longer has the white color that the salt
did when we’re pouring it out of its
container originally I’m pretty sure
that what is happening is our salt is
actually picking up a little bit of the
trace chemicals and elements inside our
crucible and our crucible is made of
graphite so it could be pulling carbon
right out of the graphite and that might
be what’s giving us this grey color it
also might have something to do with the
cooling temperature and situation in
which it forms back into a crystal well
it’s making a lot of cool noises it’s
making lots of clicking sounds and since
it’s sitting on top of the metal pot
upside down I think that’s sort of
amplifying our sound a little bit there
was a spot of salt here that splashed
out I’m not touching it either right now
because it’s still very hot I’ve got
this little stick of ice I think is
probably an icicle
okay
[Music]
it’s interesting a little white trail I
think that’s where from a tiny bit of
the salt gets dissolved and then
recrystallizes quickly from the water
salt and ice is fun to play with we
might have to do some more experiments
with that in the future all right our
salt has now cooled down it’s been
sitting here for 20-30 minutes to get to
the point where it was safe to touch I
think so we now just have this biscuit
of cooled salt that’s gone back to a
crystal formation obviously no longer
liquid but it doesn’t look like how it
did before it melted that’s for sure see
it’s about a quarter of an inch thick
maybe a little less I’m gonna crack it
in half and see what looks like on the
inside we’ve got some interesting layers
going on this first layer here where it
cooled most rapidly as it landed on the
pan that almost looks like it’s just a
clear layer I think you could almost see
through that nice and smooth that first
layer maybe a sixteenth of an inch thick
and then we have some salt crystal that
is a little bit more opaque colored on
the top half so it’s an interesting
division but we’ve definitely got a
crystalline structure that’s formed here
it’s some part of it I’m not sure if
salt is capable of cooling into a non
crystalline structure or not not very
durable I can pretty easily just break
it in my hands and it doesn’t really
seem like it takes the shape of what
accorded into this for example is the
bottom and our pot is pretty smooth on
the bottom that we’ve got lots of bumps
and wrinkles and spots where it looked
like as it cooled it sort of contorted a
little bit so unfortunately I don’t
think salt would make a very good
casting material I’ve got one more test
that I feel like I need to try inspired
by poking that piece of poured out salt
with our icicle watching how much it
piston sizzled I’m gonna try melting
down some more salt and then dropping a
piece of ice into the molten salt see
what will happen I suspect that the ice
will turn the water and then to steam so
fast that it’s kind of gonna make the
salt spray out of there so I’m gonna
make sure that I can stand a good
distance away as I drop that ice cube in
there now this time we’re trying out the
kosher salt which
I think is pretty much exactly the same
as the other salt is just slightly
larger pieces
I’ve got a little chunk of ice on my
shovel and I’m gonna use that to drop
the ice down into the molten salt
because I don’t want to be very close to
it when it drops in in case it splashes
up everywhere it popped right out I’m
gonna drop it back in it rejects it
every time you jump it out there’s
barely any salt in there all right you
were done I missed that’s funny you can
see how much salt gets shot out these
are little beads of salt that I think
cooled down someone in the air because
it’s a cool down they’re probably still
very hot not much salt left in our
container at this point molten salt
pretty fun to play with it’s very fun
consistency it glows orange as we take
it out of the kiln at least while we’re
in the darkness of the dome it kind of
rejected the ice cube we drop that in
and they were just pop right back out
four times in a row that ice cube just
got launched out of the crucible and it
cools off very quickly after we pour it
out it’s fun to see how it forms those
crystalline structures on the inside
even though it gets a little bit dirty
and doesn’t have the same nice white
color as it did when we poured it into
the crucible and speaking of crucibles I
think we’ve now added a bit of molten
salt that has solidified down onto the
bottom of it that should ship off pretty
easily hey guys thanks for watching if
you’re not a subscriber yet just hit the
bomb to get in the club if you missed
our last video or want to see it again
click up here at the top click down
there if you want to see what the
internet thinks that you should watch
next that’s it for now have fun be safe
and see you tomorrow
dome where today we’re gonna be doing
some experiments using salt and seeing
what happens if we melt it down in our
foundry some other channels have already
done some experiments using molten salt
and I figured it was our turn to give it
a shot so today we’re going to take a
look at melting salt and see what we can
learn about it we’ll see how long it
takes to melt in our foundry and we’ll
see how long it stays a liquid we’ll
take a look at what it looks like when
it is a liquid how thick is it what
color is it and just try and learn what
molten salt is like of course we will
need to be careful because table salt
melts at almost 1500 degrees Fahrenheit
so by the time its liquid is going to be
dangerously hot depending on how our
experiments go today in the future we
may try pouring molten salt into things
onto things or dipping things into the
molten salt itself let’s fire up the
foundry
[Music]
all right our salt is now molten and it
took 17 maybe 18 minutes to get to the
point where it was really nice and
liquid and then we let it sit in our
foundry for just a couple minutes more
to make sure that we really got it up to
temperature now I’ll use the tongs I’ll
take the whole crucible out of the
foundry and I’ll set it on the bottom of
a pot I had turned over that’ll give us
a nice metal base so it will just burn
the ground that it’s sitting on it might
burn some of the coating on my metal pot
but it’s hot it’s a quick demonstration
of how hot this is is just piece of wood
let’s dip that in and see what happens
to it instantly lights on fire let’s try
that again
instantly lights on fire again take the
metal tongs and I dip those in light on
fire but they get coated with salt
pretty nice it’s just a thin layer of
salt built up on the tongs right there
as it cools off it’s still putting off
some orange glow but it’s getting less
and less and I’m starting to be able to
see down through it like I can see the
bottom of the crucible so I think this
stuff is pretty clear in terms of color
that’s a very thin viscosity the way
that moves around in the container it’s
almost water lightly
[Music]
salt is not so liquid once we scoop it
out I think it’s definitely cooling down
now we have almost like a salt slush it
doesn’t look quite as warm but you can
see that it still burns the piece of
wood almost immediately so it is cooler
but it’s not cold let’s pour a little
bit more salt on top of this and throw
it back in the furnace get it back to
nice and runny
[Music]
this time we’ll put the lid on that
might speed up the process the fact that
our crucible is already extremely hot
should also make it go faster over where
we have the foundry inside the dome it’s
actually quite dark there’s not a ton of
light getting and except through the
main door so we’ve moved over here by
the door to get a lot more light because
the salt I don’t think will always be
glowing orange that much you may have
seen that as soon as I took some of the
salt out of the crucible it didn’t look
like it was glowing anymore and I think
it’s just because it was so dark that we
could see that light being put off so to
get a better sense of what it looks like
with normal lighting we’re gonna pour
our salt into this pot over here and see
what color it is see how viscous it is
and just learn about what happens if you
pour it out of the crucible into another
container so just by bringing it over
here into where we have a little bit
more sunlight suddenly the crucible
doesn’t look like it’s all glowing
orange nearly as much it’s still very
warm and it’s still putting off a little
bit of orange color that’s considerably
less all right so now we’ve got our salt
which does still look orange in here but
let’s pour it out into our pot and see
what color it looks there look how thin
and runny that is is the liquid I’m just
gonna pour all of it here we go
there you go that’s not orange anymore
it’s just that really has the
consistency of water or something that’s
so thin wow it is rapidly cooling off
though leave that you can see the salt
forming on the sides it’s getting almost
a slushy consistency already it’s only
been a few seconds and there you go now
it’s starting to form into just crystals
again the stuff that I poured onto the
bottom of the pot cooled down first of
course because it was in contact with
the metal surface and the metal surface
was cool
and it’s cooled down enough and started
to shrink that I think it’s just
completely free it’s not stuck to the
bottom of the pot it’s just a piece of
salt shaking around in there we also
have this one High Point that’s right
where I poured it on and I think because
it was landing right there first sort of
built up a little spot this is pretty
loose let’s see if we can tip the whole
thing out
seems to come off our pot completely
somewhat smooth on the bottom pretty
rough on the top we can see that it no
longer has the white color that the salt
did when we’re pouring it out of its
container originally I’m pretty sure
that what is happening is our salt is
actually picking up a little bit of the
trace chemicals and elements inside our
crucible and our crucible is made of
graphite so it could be pulling carbon
right out of the graphite and that might
be what’s giving us this grey color it
also might have something to do with the
cooling temperature and situation in
which it forms back into a crystal well
it’s making a lot of cool noises it’s
making lots of clicking sounds and since
it’s sitting on top of the metal pot
upside down I think that’s sort of
amplifying our sound a little bit there
was a spot of salt here that splashed
out I’m not touching it either right now
because it’s still very hot I’ve got
this little stick of ice I think is
probably an icicle
okay
[Music]
it’s interesting a little white trail I
think that’s where from a tiny bit of
the salt gets dissolved and then
recrystallizes quickly from the water
salt and ice is fun to play with we
might have to do some more experiments
with that in the future all right our
salt has now cooled down it’s been
sitting here for 20-30 minutes to get to
the point where it was safe to touch I
think so we now just have this biscuit
of cooled salt that’s gone back to a
crystal formation obviously no longer
liquid but it doesn’t look like how it
did before it melted that’s for sure see
it’s about a quarter of an inch thick
maybe a little less I’m gonna crack it
in half and see what looks like on the
inside we’ve got some interesting layers
going on this first layer here where it
cooled most rapidly as it landed on the
pan that almost looks like it’s just a
clear layer I think you could almost see
through that nice and smooth that first
layer maybe a sixteenth of an inch thick
and then we have some salt crystal that
is a little bit more opaque colored on
the top half so it’s an interesting
division but we’ve definitely got a
crystalline structure that’s formed here
it’s some part of it I’m not sure if
salt is capable of cooling into a non
crystalline structure or not not very
durable I can pretty easily just break
it in my hands and it doesn’t really
seem like it takes the shape of what
accorded into this for example is the
bottom and our pot is pretty smooth on
the bottom that we’ve got lots of bumps
and wrinkles and spots where it looked
like as it cooled it sort of contorted a
little bit so unfortunately I don’t
think salt would make a very good
casting material I’ve got one more test
that I feel like I need to try inspired
by poking that piece of poured out salt
with our icicle watching how much it
piston sizzled I’m gonna try melting
down some more salt and then dropping a
piece of ice into the molten salt see
what will happen I suspect that the ice
will turn the water and then to steam so
fast that it’s kind of gonna make the
salt spray out of there so I’m gonna
make sure that I can stand a good
distance away as I drop that ice cube in
there now this time we’re trying out the
kosher salt which
I think is pretty much exactly the same
as the other salt is just slightly
larger pieces
I’ve got a little chunk of ice on my
shovel and I’m gonna use that to drop
the ice down into the molten salt
because I don’t want to be very close to
it when it drops in in case it splashes
up everywhere it popped right out I’m
gonna drop it back in it rejects it
every time you jump it out there’s
barely any salt in there all right you
were done I missed that’s funny you can
see how much salt gets shot out these
are little beads of salt that I think
cooled down someone in the air because
it’s a cool down they’re probably still
very hot not much salt left in our
container at this point molten salt
pretty fun to play with it’s very fun
consistency it glows orange as we take
it out of the kiln at least while we’re
in the darkness of the dome it kind of
rejected the ice cube we drop that in
and they were just pop right back out
four times in a row that ice cube just
got launched out of the crucible and it
cools off very quickly after we pour it
out it’s fun to see how it forms those
crystalline structures on the inside
even though it gets a little bit dirty
and doesn’t have the same nice white
color as it did when we poured it into
the crucible and speaking of crucibles I
think we’ve now added a bit of molten
salt that has solidified down onto the
bottom of it that should ship off pretty
easily hey guys thanks for watching if
you’re not a subscriber yet just hit the
bomb to get in the club if you missed
our last video or want to see it again
click up here at the top click down
there if you want to see what the
internet thinks that you should watch
next that’s it for now have fun be safe
and see you tomorrow
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