Clay crucible
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- Опубликовано: 21 июл 2024
- This video gives a basic understanding of simple clay crucible.
Grog = a refractory material that is in a solid state and does not bind together when water is added to it. Already fired fireclay can be used as grog, after being ground to the right size
Disclaimer: use the information given in the video at your own risk 
Хобби
THE BELLOWS IN THE LAST PART IS AWSOME.
That was a fantastic video, and i intend to use your instructions to make myself a crucible for casting bronze now.
Superb video dood! Really useful for my day tomorrow. Got fireclay, got grog, cast one half of a crucible press mould I’ll try and send you a link if I get that far. Thanks for the help👍👍
مرحبا قول لي ايش المواد كم حراره في الفران والف شكر لك
Very good video. Can we use borax while melting gold?
شكرا لك ❤️
It's important to ram it on all sides.
So it's just clay and a smashed firebrick
Making crucible 1200 degree vodeo
update on the crucible .... although it were only 50 grams, i managed to melt copper in it. it had a very good viscosity, indicating that it is possible to melt copper and also to pour it from this crucible. temperaturemust have been at least 1100 degrees celsius, but i guess it may have not been higher than 1200
I love the bellows! That is pure GENIUS!
fuckin oath
That "lung" blower you improvised is an amazing idea
You don't even need the fire clay (chammotte), you can just use regular clay. Just make sure it's fired up just like he shows in the video. Don't use artist's modeling clay because that contains oils. Buy regular clay. I was lucky in that there is a big clay deposit on my property which I mined myself. The house had been built where a pottery workshop had been in the 1300s because the clay was right there. I used a 2- step process. I dissolved the clay in a bucket of water (about 1 part clay 3 parts water) and passed it through a fine sieve to get out all the little rocks. Then I passed it through 4x layers of linen rags and let the bucket sit for 1 day. I then decanted as much of the water as I could, then did that again. This was done to get rid of the soluble salts. Then I let the bucket sit in the sun for about a week until it was bone dry. To make the crucibles I used pretty much the same method as in the video. Once they were dry I put them in the oven @ 100C, I hour, 150C, 2nd hour, then for 2 hours @ 250C. While they were still hot I fired them up in the smelter and only 1/4 cracked. You can use them for Cu, CuZn, Zn, ZnAl, Sn, Pb, and of course Al. Never did Fe. If you can't get clay, you can pretty much find it anywhere. Easiest is to walk alongside a river or a stream and look out for patches of beige in the shallow water. Run that between your fingers, and if it feels slimy and sticky, that's clay.
How long is the crucible fired in the smelter for? Thanks
Are you sure dude? I was melting lead in my own foundry with a steel pot as my crucible and it broke and I lost all my lead. I do not want to buy a graphite crucible because im cheap. but is regular clay REALLY works and wont crack under temps up to 2000F that would be amazing. Please tell me if this actually works.
Yes it does work and I have done this a couple of times but I've never used it for anything higher than brass. I'm surprised that your steel pot broke but it may have had an internal defect that snapped it due to the temperature change. Using regular clay for a crucible is not something I would do anymore unless I was using enough protection where a breakage in the crucible wouldn't result in serious injury. When I was younger I took way too many risks in metalwork and had MANY close calls. I'd use regular clay only as a mold because it's easy to form but that's about it, and only in a sandbath, and with low-melting metals like brass or aluminium.
Wow dude. Thanks for the advice
I have melted lead in a food can, no big deal. If you want something more permanent, an aluminum cooking pot is good for lead. No need for a foundry. You can melt lead with a cooking pot on a stove, or outside on a Coleman type stove. Uneven heat can break cast iron, and have seen it break a steel saw blade, Even heat is the trick.
Awesome video. I love how informative, quick, and to the point it is ... wish they were all like that!
Thanks for sharing your knowledge, many insightful points in the practice of high quality crucibles!
I think I just found the best recipe for refractory crucibles. Hopefully, it might be good for putting a hamon or temper line on my kiridashi. 40% clay+60% firebrick grog? Very genius recipe indeed, thanks man.
I should have watched your vitdeo. I had a crucible - after melting Alum - I removed it from the oven and let the metal cooled in the crucible - I cracked 4 - crucibles after a few burns. Thanks for the information - I will follow your method and use the cracked crucibles to make the new ones. Thank Ypu so much for your posting
thank you very much for such a great video. you guys helped me a lot with my crucible making project
Made a crucible of clay today :) I have a lot of dry clay outside my house I smash it up with a hammer until its very fine then mix some water until its like workable, shaped it into a crucible and waited a day to dry. I then fired it in my charcoal furnace. :) works!!! thanks!
that sir is a perfect video. has all the info i want and easy to follow
excellent video, a lot of great advice
Well done, giving me lots of ideas to recover scrap silver.
Max Keiser reckons silver will reach $500/ozt, so this DIY set up looks a good investment.
Thanks again for all your help :)
what a great video, very well done. I love your billows, I use a leaf blower or air compressor and they work great, but they use electricity yours is awesome. I subscribed . thank YOU
very informative video sir,.. thank you for sharing your knowledge
That was EXCELLENT holy cow thanks!
Don't worry about your voice, that was great!
Cool..Nice work.
Been thinking of incorporating some straw ash in the clay to see if that helps.
brother u are a genius,I do not understand English well,but I will make one.
FABIO MORETTI(GOLDSMITH)
SÃO PAULO-BRASIL
great video
i brought fire clay more than 5 years ago i kept trying to make things out of it but it always fell apart will compressing it stop this or grog and making sure its not too wet
If it is improper for melting metals what is it good for?
This dude rules.
for melting aluminium, which crucible would be more suitable
1.clay graphite or 2.procelain
Could I substitute the fireclay and grog for EPK kaolin and calcined alumina?
What refractory is your crucible made off?
i have some fireclay which is standing 1800° celsius for a long time. is it possible to mix it with the firebrick? which temperature does your fireclay stands???
@Robkat3751 thank you for the information, unfortunately i have not found the video you refere to.
could you post the link to it?
Thank you, very interesting..
are those types of crucible ferous rated?
Hi hope you don't mind me asking you would it be ok to swap the water with glass water or water glass I forget which way around it goes. kind regards Iain
Hi can this crusible melt most type of metal? And would a bigger size crusible work?
Where can u get these types of clay powders. I checked home depot for them and they dont have it?
could i use this to make Casting Molds
Excellent, but where do you obtain the unfired fireclay? I use "assay crucibles" which are ordinary "mullite" fireclay composition and are not expensive- they're used as disposables for doing ore fire assay analyses. One mullite crucible has done many, many bronze/brass melts and shows no signs of damage, needs no special dry storage etc.
how do you make a crucible for platinum ?
will brass work in this
where you get the grock?
can I melt steel in this crucible?
I wonder if I can use 60% volcanic grog like pumice, which is the cheapest igneous rock in Mexico. Imo, it's a good substitute for perlite. I need to make bag bellows like yours as well.
is there a recipie that says how to make fireclay
Hello, great video, what is the recipe of the crucible?
@fly2000jtb the amount is variable but a good mixture is 40% fireclay and 60% crushed firebrick. use crushed firebrick, do not use sand as it will melt at about 1000 deg celsius and compromise the crucible.
i have used one of these crucibles for more than 7 bronze pours. it got a bit vitreous on the inside because of the borax used as flux for the bronze.
if you need help write me. good luck and be careful with it !
Hello in my region I don't have acces to fire clay, or I don't know where to find It. I am not in US.
For crucible, can I use, clay, or powdered fire brick? or graphit from pencil. may be ceramic...?
foarte fain!!! unde pot gasi materialele necesare?
Can you describe that bellows a bit more wanna make one
I searched and searched for a video like yours!
THANKS
so is it just made out of clay
thank u
what did he grind was it fire brick? and where do you get grogities? t :D:D:D:D:
i used to melt silver and bronze with it, either for casting ingots or for casting figurines
That's one of the most informative, thought-through videos I have ever seen. I didn't understand why the crucible is not suitable for aluminium though. What would you use to melt aluminium?
a steel crucible is what you use for Aluminium
can this crucible melt copper ? dont wanna waste so much on graphite crucible :S
can i use the clay found in earth ? home deopt sell some of them xD
how do you make that pump thingy
It is literally a bag with a pipe and two sticks.
Just wondering - Can the crucibles be reinforced with some metal wire insert while being made ? Will that be internal stronger and can have more strength?
+Liem Duong the wire is most likely going to crack the crucible open because it will expand when hot, far more than the ceramic material.
You're Right - They have different thernal expansion rate - Thanks
@fedaikn, Thank you for this great and informative video. I like your accent. Where are you from?
You're right fire bricks are better than pumice and can help my yellow clay withstand forging temperatures.
it may not work. i have read on the internet that the melting point of pumice is around 1000 deg celsius.
i recommend you test both, a piece of refractory mix made with pumice and a pice of pumice in your furnace. just heat it to the max temperature you can reach and see if it melts. if it does, you have to look for a substitute.
remember the firebrick, yu can always use that one.
i recommend you take some time and build a box bellows it is better than the bag one, on the long run of course
ceramics make the best crucible for most of metal melting it is cheap and easy to make at home.
Can this crucible melt copper? If not, what do I need to mix with the fireclay so that it could melt copper? Would Silica Sand improve it?
I'mHungry it can melt anything with a meltingpoint liwer than iron
Awesome! Thank you. God bless.
salut daca mai ai ocazie sa te uiti la comentari te rog sami spui mai precis toate materialele folosite de tine la fabricarea acestui creuzete poti sami scri tot asa cum team scris ieu sau pe meilul meu ca io nu anteleg engleza si nu am anteles ce ai folosit ati multumesc
do you use software for the voice or is this your own voice?
will this crucible withstand temperatures necessary for smelting steel?
i guess you mean melting.
well, no. this fireclay is rated for 1100 deg centigrade. for melting steel you will need higher temperatures and the crucible will become mush.
search on some forums for blademaking where they talk about wootz steel, maybe you'll find out what type of fireclay to use.
+fedaikn +aubrey smith That's not true. Clay is REALLY hard to melt. It's like trying to melt a rock or sand. You need insane temps. Like plasma torch temps. I've gotten clay crucibles to glow. I've used them for hours inside of a furnace running at well over 2000F (1100C) with the coals touching it. Only thing that may happen is that they could crack as they cool down. I've made them before by hand, but it's kind of a pain. To be considered fire clay, it must have a minimum melting point of 2759F (1780C). Way over 1100C. High grade fire clay won't melt until 3227F (1775C). I just go to home depot and buy small clay flower pots. They cost less than two bucks at home depot. Steel melts at 2500 degrees and it gets soft even before that. Which is why I use clay. I'm afraid the steel crucibles will get melty or soft and slip out of the clamp I use them to remove the crucible from the furnace. If I crack a clay crucible from letting it cool down from such a high temp, usually I just repair it with more clay and fill the crack. It's not like patching something, because it just becomes the pot. You want clay that is as red as possible. The more red the clay, the more iron it contains. You're going to need clay, because steel melts at 2500F (1510C). Iron melts at 2750F (1370C). A 250F window is way to narrow for my liking in terms of safety. If you used an iron crucible...by the steel is melted nicely and stirs easily...you're getting to the point where the iron is going to get a little soft. If that shit slips out of the crucible clamps...you're going to set the ground on fire. Even pavement would light up and you'll never get the steel off of the ground unless you're furnace and pouring station is on dirt/grass. You should buy some high end fire clay that won't melt until at least 3000F.
I love your bag bellows! Mine are made of duct tape.
Any reason why you couldn't throw this material on a potter's wheel rather than force-molding it?
i have no potter's wheel
but you can try it with just the fireclay, i think it will work.
Hand shaping will bring air bubbles into it, unless ofc you've compressed the clay with a screw extruder or hydraulic press before shaping. This is why professionally made pottery cracks less than what you make at home, most people can't knead the air out of it and hydraulic or screw extruders solve this problem
how did u make tha bellows.
Victor Onyegbado i made them out of a plastic bag. it's quite simple and straight-forward, used only the bag , some wood sticks and scotch tape. watch this video watch?v=Ut3pXPyMze4 , it should help explaining
Thanks bro
I am considering building a large tilt style furnace, and I found this technique for making a cruicible intriging , however I wonder if you think it is concieveable to build one of these big enough to melt multiple gallons of aluminum at a time?
I think you might be better off using stronger materials
especially if you wanna build big stuff you can have your rolled into sheets and along with some hollow sections and angles you can make a boat
@panzuman i found the silver price to be about 18 USD per ounce, of course that goes only for fine silver or 99,9% pure silver. to make jewelry you need 925 silver and that should be a bit cheaper. go to silverprice . org
my crucible is really small, i guess it can hold about 200g of silver. because it is so small it is less subjected to fail because of uneven heating. no idea if your propane furnace heats it to quick, just try and see what happens.
i think the process of gradual heating is called proving
Can you use chamotte mortar instead of fire clay?
I'm looking to make a crucible / bowl, larger than yours to melt glass in and I have a few questions, if I may ask?
Ceramic clay and foundry clay are they the same? Can Ceramic clay / bowl be reheated to 2300 degrees multiply times without it cracking?
Thanks in advance for any info. Kevin
my voice, i know it sucks :D
Groke? 2 mins, 12s
Any refractory must be "bone dry"
and gold
you mean forkly ?? 2mins, 9s.
probably not.
the crucible will fail at about 1200 deg centigrade. you have to find something else for the steel
I dont think it sucks :D
grrrok
using vaseline when inserting a plug.. XD
HA wikipedia