Best set of videos yet.. just what I needed.. thanks for saving me a ton of science and effort..

For some reason youtube recommended this video to me, so I watched it from start to end and found it pleasant to watch even though I had no idea what you were doing/making. 😃 Going to watch part 1 now.

A very nice balance of knowledge, common sense, and the plain-spoken word. A useful video I hope to use someday soon.

@nilamotk

9 жыл бұрын

Glad you like it, thanks for watching.

Thanks for the great instructional video once again! I made one identical to this one you made, but put a vacuum bag around it first, then after I molded the sand, I used my shop vac to suck out all the air. I then injected carbon dioxide as much as I dared without having the bag rupture, and let it sit for a couple of hours. I was then able to remove it from the mold and it was really hard already! I fired it and viola! It is awesome and very rugged and fired beautifully. It really came out classy. I may have to make a small rocket stove out of this stuff. Anyway, thanks for the instructional and inspiration! I really dig your videos!

@nilamotk

8 жыл бұрын

im glad it worked out for you. and im glad you enjoy the videos

I enjoyed your approach in the video. You explained the process and made the process clear. Thanks. From Manitoba.

Not gonna lie, as a DIY-er who just got into casting this and part one are some of the coolest shit I’ve ever seen. Thank you for sharing.

@TimothySmithii

4 жыл бұрын

You ain't lying. I've seen a ton of videos on this shit and this guy is next level. Knows his stuff.

Thank you for sharing this, it's an excellent presentation!

I am trained in high temp and masonry heaters. This video is a great intro and I think you are on track. Firebrick does have mostly alumina, so if you want to recreate that, put that in. I'm seeing good results with nasi soaked into kiln insulation. That could line the inner walls of probably anything up to 3000. And it goes well in combo with the stuff in this video. Thanks for your efforts! I'll check out your other videos.

@oozification

3 ай бұрын

do you think I can use this brick inside my brick oven ? I am curious if sodium silicate is food safe

Thank you for sharing the knowledge you worked hard to learn

Hey there, Firstly Great vid, I am subscribed and have watched most, if not all of your videos. So keep it up :) My question is could you make a rocket stove with this process or would you advise pearlite and Sodium silicate? Thanks in advance

Well, this is an older video, but new to me. I never knew the differences of sand types. Thanks to you, now I do. For Silica sand, look for "pool filter sand" $12.99CA for 20lb bag at my local Canadian tire. :D Thanks to your vid, I'll final be building my smeltery today!

@craigmurrayauthor

Жыл бұрын

what brand? crappy tire here has aquaquartz, same thing?

Good strait forward video, thanks for posting.

You did an excellent job of explaining everything in plain English that even I can understand. Thanks for all of your effort.

@nilamotk

8 жыл бұрын

I always try to keep things simple, as well as explaining it thoroughly... something school has never done for me.... lol

Great video even after so many years - Thanks! The formula you have here is really good. By the way, as you probably know by now, the Hi-Temp compound is actually a mixture of only Sodium Silicate "waterglass" (maybe 1/3, so still uses the CO2 for initial cure) and Kaolin Clay.

Excellent tutorial. Thanks for making the vid

@nilamotk

8 жыл бұрын

glad it helped.

I really liked the shout out to the safety police. thanks for the video. I was going to buy expensive fire bricks but know I'm making my own.

@nilamotk

7 жыл бұрын

Sean Hirsch hope it works for you. and I'm a huge safety guru if you couldn't tell.

Very informative. Thanks.

great set o videos good to see young men who still use there hands and brains, you'll go far.

@nilamotk

7 жыл бұрын

seanmedic1 I hope so, appreciate it though. always willing to get my hands dirty.

Good stuff. It might be easier to mix with a rotating drum type mixer with some vanes on the inside. Probably would mix as well or better as the paint mixer and you could be doing something else for that 15-30 minutes. Let it mix for an hour if you want.

Where did you go? You are a natural in so many facets. especially education. Come back please.

would damp portland clay add or weaken it's breakability or it's fire resistant properties? What about pure dry portland cement (fired in a kiln type portland clay)?

I used a similar method for my refractory but I used ultra fine sand blasting media instead of play sand. It's pure alumina (aluminum oxide) and has a better refractive index than silicon dioxide. Most industrial firebrick uses a mix that is mostly alumina with a small amount of silicon dioxide. Alumina also has a higher melt point so you can potentially work with much tougher metals.

@nilamotk

8 жыл бұрын

alumina withstands some crazy temps.. your mix should stand up to 3000 degrees easily.. TIG welding torch tips are made from alumina... TIG welding exceedes the temps of the sun...

@user-ky3dp8kr4w

8 жыл бұрын

+nilamotk Suns a bitch. :)

@emel60

3 жыл бұрын

David, do you perhaps know how high temperatures would alumina and sodium silicate mixture withstand? Wouldn't it be less than pure alumina since the binder melts at lower temperatures respectively?

Informative video, excellent. Please let me know, what material in plastic can & what are the material & ratio used for making refractory tile. Ordinary sweet river sand can use instead of silica sand?

Brother this is the best real video i see nothing compared with the non good plaster Paris and perlite

@nilamotk

5 жыл бұрын

To be fair still won't beat a professionally purchased firebrick, but it will do for homegamers

This is amazing! Never knew you can make refractorary brick this way. Thank you so much! I definitely will try this myself. Do you have any links with more background information please?

I have to ask you a dumb question once I make my brick out of this material do I have to fire it for a certain amount of time and at what temperature? Also should I add any aluminium oxide to this would it assist and making it more dorable inside my wood furnace?

great videos, thanks for the info

I think for the the safety of the whole KZread audience (except the poster of this video of course) I have a warning message: using gloves that are damaged or flawed to protect from heat, high heat or ultra high heat can lead to serious injury or death. End warning. (hope you can perceive my sarcastic humor) As an educator in the public sector, I do offer one piece of info that I have found very useful when dealing with the public- do your best to make no response to those who have anything even remotely close to negative to say. (for example those who have supposed "safety" reminders or those who know a better way ). simply never acknowledge the comment. This advise has served me well over the years. Actually, though, I wanted to mention that I really appreciate your willingness to share your knowledge and all the effort put forth to put your videos here. I made your mantles, and, in spite of purchasing two since, they are still in rotation. I also made a "version" of your "triac-based temp controller" and now, as Im collecting info for a muffle/tube furnace build using Nichrome 80 and I run into this video. Thought it was time to sub. ty again.

@nilamotk

5 жыл бұрын

Glad to help out, and thanks for subscribing. And no need to worry, I'm thick skinned. It's quite hard to hurt my feelings haha

What is a good ratio of sand, cement and ss? You didn't say in the video? Also do you cure using co2 or just fire them? Thanks

Very good video - Thanks! And, yeah as you do mention, it is the CO2 from the combustion process (NOT the heat) that cures the sodium silicate. The heat DOES drive off the water though - all good!

@nilamotk

4 жыл бұрын

I know, but this wasn't so much of a science lecture as it is a how-to

Thanks for this video very helpful Do you have any updates to this ?

Great Video! Just subscribed. I was laughing when you mentioned it was round, so it could get in the corners. However, you are obviously talented and I knew you would catch it. You handled it eloquently. Great Job.

@martyvanord984

7 жыл бұрын

Actually there is a corner between the circular form and the flat top of the sand.

Great Job !

@nilamotk very comprehensive video well done dude

@nilamotk

8 жыл бұрын

thanks, glad you like it.

water glass aka sodium silicate can be bought in a auto part store. It is sold as a filler for glass windshield. Just filter out the copper. Also you can find it in a ready use putty in the exhaust section. It is sold as exhaust repair putty. The putty is not cheap but the water glass is a few bucks.

How's it holding up after so many years any changes after this video? Thanks

Can you make a rocket stove riser pipe with this material 8 in ID x 2in thick x 42 in long. And how?

How long can it last when exposed to the arc furnace???...

So would sodium meta silicate work as well?

Kinda you explain why roman concrete lasted so many centuries, they added volcanic ash to their concrete mix which is I believe the same thing we try today. Waterproof, fireproof...good stuff. Please add your comment/reply.

If you round the edges slightly, it will better resist cracking due to handling. I learned this from a guy that works with concrete..

@TheKlink

4 жыл бұрын

also, make the edges denser by pushing on the material in the corners and adding more.

Nice work. Have u ever used perlite in your mixtures? I'm about to be checking out your channel! Looks like some good info. Thanks!)

@nilamotk

9 жыл бұрын

I was gonna use it for this mixture, but it's the off season and I couldn't get my hands on any... And there's a little bit of everything on my channel.

So out of curiosity, since the vid was done in 2015, how were your results?

nilamotk, Just thinking and wondering, I made a forge using just plaster and finely sifted river sand, same idea grant thompson made, but mine was on a larger size. ( galvanized trash can size) even though I estimate it to reach temps exceeding 2,500° it held up nearly a year, then as expected it began to fall apart. but it was enough to let me decide how deep into metal casting I might want to be. ( now making plans to rebuild the first one with improvements while still burning, wood, propane, charcoal, or nearly anything else burnable that will fit. as well as have ideas to build one in a recycled 175 gallon used oil tank like you might see at a minute oil change place as well as ideas for two sizes of electric foundries. the largest one will double as a gasifier as well as melt multiple crucibles of material at a time for larger pours. it will also have option to inject forced air or for extra high temps, oxygen from an oxy / acetylene welding torch. but that one I will have to track down the profesionale refractory supplies. ) In the process, someone suggested when I rebuild, that I use a mix of course steal wool and stainless steel Scotch-Brite Stainless Steel Scrubbing Pads inside the refractory, same idea as the rebar /rods you mentioned. I'm thinking of using your mix in place of the plaster mix but add the steel mix I mentioned as extra redundant reinforcement as it will allow for the heat expand / contract better than rebar. What is your opinion of this? I am new to the sodium silicate idea. Are there any reactions or bad side affects you know about that would make the steel wool & stainless steal a bad idea with your sodium silicate idea?

This is one of those videos that You've got to watch over and over again. The kids so cool! He mixes the s*** out of that stuff! Lol Big rock in it we don't want that Just throw it over your shoulder, LOL

@HavanaWoody

3 жыл бұрын

I think this is my third time, great cadence and narration.

Hi man， great video， help me a lot

nice build....

I'm in Mexico and wanting to make some parts out of aluminum. I need to make a foundry and you have just answered my questions. Now if I can find sodium silicate.

@nilamotk

4 жыл бұрын

Make it, check out my video on making sodium silicate.

I really loved the video and I was really inspired by the way your firebricks hold together. I am trying to find information on sodium silicate/ potash silicate so this really gave me insight into its strength. Thank you for taking the time to show this info. I really want to play around with this stuff and see if I can craft it from refined wood ashes and silica sand, since people have documented making it from like 1600 and beyond. I am really amazed by that fact alone and want to see its potential as a building material :) P.s. found a PDF that has info and tidbits of ideas for its uses. Let me know if you want the link.

@nilamotk

9 жыл бұрын

Check out part one (link in description) on how to make sodium silicate. I'm glad you liked the video, thanks for watching.

@estephendemesa6549

2 жыл бұрын

Link pls

2 questions. If you dont have fire cement you can substitute for normal cement, or its better only with silicate and sand?. You can use other kind of sand?

@BoogieMan2718

3 жыл бұрын

Do NOT use regular cement, it has a high water content even after curing and may explode.

Hey this seems neat. I cant get play sand where Im from but I got plenty of beach sand. Is it possible to substitute the two? Would I need additional ingredients? No I do not have refractory cement either.

@scootin123

6 жыл бұрын

Jyumai Darn Read all the comments many questions are answered by other viewers like using Portland cement with sodium silicate to increase the available firing temp and also adding alum. Oxide

Have you ever tried adding a little bit of pearlite to your mix?

nice helpful video thanks for sharing . i have a idea or you can say question about sand with sodium silicate .i mean if we direct take play sand+sodium hydroxide and water so can we take good result for make bricks tiles etc?

@allanhorne6067

4 жыл бұрын

Simply, NO! Don’t mess about with sodium hydroxide unless you really know what you are doing (I mean some sort of degree or higher qualification in chemistry) it is extremely caustic and will take your skin off which will take about 6 months to heal or blind you if it gets in the eyes. Just because sand is silicon dioxide don’t assume it will make sodium silicate if you just mix it with sodium hydroxide. It needs much higher temperatures to react. You will just end up with sand and sodium carbonate - eventually - and that won’t work as a refractory.

Can you use this for a read oven

I spent most of my life as a factory rat in the rust belt, bouncing from job to job. In the process, I was exposed to far too much hazardous crap without proper safety gear. As a result, I've become sensitized to a wide range of chemicals used in almost every product imaginable. I'm not actually allergic to my own shadow, (yet), but I never know when I'll run into something troublesome or how bad the reaction will be. Don't blow off handling precautions. A little extra care can prevent some huge future problems.

@nilamotk

4 жыл бұрын

Thanks Joe, this videos pretty old now. I actually own box of gloves these days haha

@joekahno

4 жыл бұрын

@@nilamotk That's Ok, I'm pretty old too. After forty years of watching my job get exported, I exported myself. Living in the Philippines now where making something out of nothing is sort of the national hobby.

@joekahno

4 жыл бұрын

@richard mccann I don't want to say *only* four dead. For them and their families that's about as bad as it gets. In comparison, the last one to pass near my neighborhood was Yolanda in 2013. Over 6,300 dead and that count is low. Some neighborhoods were just gone.

Excelent Thank you !

Any tips to make it more flowable like a slurry

Play sand plus Sodium silicate only has a melting temp. of 2100 F. which is great for light forging working at cherry-red heat and below but you really need to add about 60% "ION GROG" grit or "ALUMINUM OXIDE" grit to this mix to make it durable for 3000 F. all around forging and knife making / iron and brass melting / repair work!!! For $10.00 more in materials this project could big a real monster that could do any job and last forever.

@scootin123

6 жыл бұрын

Thermodyne Systems Thanks for urban explanation,

@scootin123

6 жыл бұрын

Phrase checker run amuck . SHOULD OF POSTED Thanks for your explanation

@Giganfan2k1

6 жыл бұрын

Thermodyne Systems where would you get aluminum oxide? Pain store or just use the belt sander?

@MegaRetroRocket

6 жыл бұрын

Aluminum oxide is commonly found as a sandblasting abrasive. You can get it at Harbor Freight tools or similar.

@eg8475

5 жыл бұрын

+Thermodyne Systems, make the video. We will watch it!

Question. Is this recipe better for high temperatures than recipes using portland cement? Also, can you use perlite instead of some of the sand to make a lighter and insulting brick?

@tedsykora1858

3 жыл бұрын

Note......A circle doesn't have a corner but a cylinder does.

Thanks for the video! How did you heat it red hot?

@nilamotk

9 жыл бұрын

I used an aluminum melting foundry.

I’ve learned nothing in my life. This stuff is so cool to see. Can you forge me a do-over so I can learn all these thingsI forgot to pay attention to in my youth. 😁. Great stuff, this!

@nilamotk

4 жыл бұрын

I'm a high school dropout.. I've learned everything I know here on youtube and from the all mighty Google. "If you think you can, or you think you cant, you're right." I didnt care for school, so I failed.. for my own hobbies, I have a serious interest and if that guy on youtube can do it, so can I. That being said, "I've never failed at anything, I've just learned hundreds of ways that dont work" When you try something for the first time and inevitably fail, look at it as a source of experience and try again.. if you fail and instantly think you cant do it, you never will.

I ended up making a 4 inch J tube core for a rocket mass heater. Holy cow can this stuff hold the heat! my best results were with dry sand and large volumes of sodium silicate, pack the mould, light it almost immediately and burn out the inner mould.

@bobansley8177

8 жыл бұрын

+LimitedGunnerGM How thick are the walls of your J tube, and could you post all dimensions of it?

@jeremiahshine

8 жыл бұрын

+Bob Ansley I'd say it depends on the size of the system and the barrel style used, i.e... need to keep the room in the barrel for airflow. the cob and perlite packed thingies are pretty thick. Gotta keep in mind that initial draw might suck if it pulls too much heat. No big deal if airflow isn't restricted, i'd think. A four inch system with 4" walls would be cool.

@nilamotk

7 жыл бұрын

LimitedGunnerGM glad to hear it worked out for you. how's it holding up?

If you are working with your hands in cement or concrete all the time or a lot you really need to wear rubber gloves. Not because it dries your hands ou, but because I've been told you can get poisoned from the lime in the concrete/cement. How well did that work for your foundry?

Ypu sound really cool Dude

I like this video a lot. Very helpful! I didnt hear you say a % of sodium silicate you use. It must be higher than 3-4 percent used in cores.

@nilamotk

4 жыл бұрын

I did not take any measurements I just poured in a bunch made sure it wasn't Soup and it worked, it's really simple

So I'm making a pizza oven, and need a span of 24 inches. I used a big hunk of granite before and it worked for about 6 fires until it didn't work anymore. If I put stainless wire in it, do you think if I made a 24"×24" square it could hold up ok?

@Will-tm5bj

3 ай бұрын

Maybe use a little more of the refractory cement?

have you tried making an aircrete version? Even mixing this with perlite would lighten up the weight. On thing when using CO2 as a curing agent, it helps to push a thin wire into multiple locations so that the curing gas goes beneath the surface. Great job, though! Thanks for sharing. (for the record, if you are really being safe, you should have a CO monitor in the area about 5 feet up on the wall. CO poisoning is insidious.... it's cheap insurance! )

hi there. great video for diy enthusiasts. you already gave crutial information and pointed out the things people should do at their own risk so I would ignore them. they can get their stuff custom ordered from where they feel safe enough. you simply want to help others that want to save money and maybe learn a ring or two .. My question is, is there any difference or advantages if I follow your recipe but replace sand with perlite or 50/50 mix ? strength, tempreture resistance etc? thank you for your response in advance.

@nilamotk

5 жыл бұрын

Sorry for such a late reply but I wouldn't use perlite it will melt.

Curious if you've ever tried adding perlite to the mix?

@gerdawhite6012

3 жыл бұрын

He doesn't appear to be all that responsive to questions... Question: wouldn't the use of Perlite be for making a lighter weight finished product ? And wouldn't that material also make the cement softer ?

Awesomee... did you use play sand ? same with children play with?

I shall subscribe but only because you are fully licenced in so many things. It's really quite offensive I mean impressive. Can't wait to explore your channel.

Can I use this for a wood pizza oven? Will it contaminate the food or will it be safe. Was thinking to use this for bricks on the bottom part where food will touch. Thanks in advance. Great video btw

@antoniodicappo403

7 жыл бұрын

NO Good for food, very TOXIC!

Will the sodium silicate mix foundry stay together for melting copper or only good for aluminium

@nilamotk

5 жыл бұрын

Copper would probably be pushing its limits.

As far as I know sodium silicate sets when in contact with CO2, so I'm interested, when you fire it, does the heat actually have anything to do with the process, or is it just CO2 that's produced by burning the propane that does the job?

@thomascoughlin8026

4 жыл бұрын

My bricks came out at least 30% harder. After using the CO2 to "set the part" I pre-fired them in the kitchen oven @ 350 deg for over 30 min. Don't know for sure exactly how long the minimum time would be, but would guess that you would want the part to heat soak completely. Just guessing again, my thinking is that the hardness would increase with the higher temp.

Awesome, we can affect the color!

@nilamotk

7 жыл бұрын

Richard Vasquez yes add brick/cement colouring to it.

So I'm not sure if you'll ever see this message but 🤷‍♂️, just cuz you might never read it doesn't mean it's not worth saying. Just wanted to say I'm glad I found your channel. You have some of the most helpful, informative, and interesting content on KZread. I'm proud to say I'm subscribed, just incase you decide to upload again 😁

@nilamotk

2 жыл бұрын

I see it, and I appreciate it. I plan on making some videos again one day, lifes gotten in the way and I'd like to do some editing vs just rambling on for 10 min strait... Well see how that goes tho. 😂 Thanks for watching 🍻

To start the curing process laid dry ice on top of it and then before you fire it allow it to thoroughly dry so that the steam doesn't push it apart

@TheKlink

4 жыл бұрын

that's a great idea

What does your ADEQUATE VENTILATION look like? Maybe some of us will want to copy it or adapt something based on it to suit our circumstances.

@nilamotk

6 жыл бұрын

Ron Yerke have a look on my channel. You will find it.

Man I made some bricks out of this stuff and it's softening with heat. Have you had that problem?

FIREPLACE REFRACTORY PANEL REPAIR - Suggestions anyone on repairing a (new, unused) propane fireplace rear refractory panel small “leg” (bottom right corner) that was accidentally broken after being stepped on. I have 4 oz. of liquid glass (40% solution) and a small tub of refractory cement. I’ve read the many cautions, observations and recommendations including the mixing of these two ingredients and/or even maybe adding some baking soda and then maybe first use dry ice to facilitate drying before trying a more staged slow, increased heating of the mend. Any other suggestions out there?

Great vid, thanks so much. What type of compound would you use to cast a pizza oven with? This is obviously resistant to very high temperatures but perhaps not very healthy should small particles and vapor mix with your pizza. Can you think of a good castable concrete mix to make the oven dome? Your input would be appreciated. Obviously needs to resist very high temps and not be toxic.

@nilamotk

7 жыл бұрын

I would reccomend using fire clay. you could cast the dome I refractory cement or Portland cement and then line it with a few inches of fire clay. it will resist high temps and be food safe as long as you coat all exposed concrete in clay.

@shonaoneill5151

7 жыл бұрын

nilamotk portland cement is shit as a refractory! It will dry out and crack. You should use true refractory cement with 40% alumina added to it.

@nilamotk

7 жыл бұрын

Shona O'Neill where's your video showing how to make it?.. everyone's an expert, right?.. as for your other ignorant post.. I'm G1 certified.. I work on 12,000,000 btu annealing furnaces... but thanks for coming out. I'm also 313A refrigeration technician, servicing 90 ton chillers... certified for residential geothermal installation... residential radiant hydronics design... I could go on, but I wouldn't want to hurt your feelings...

@pamelaparker4143

5 жыл бұрын

@@nilamotk thank you so much for sharing your knowledge

@pamelaparker4143

5 жыл бұрын

@@nilamotk right on!!! tell it like it is

Thanks a lot

Hello this id amazing, we recently had a vulcanic erruption and I have 20 sacks of volcanic ash which consists of about 45-75 wt% of silica [27]. In addition, silicate is the main component of most minerals like feldspar, olivine, pyroxene, hornblende, and biotite (Google source) Could I use it instead of play sand?

@luciusirving5926

3 жыл бұрын

Sure.

Just a matter of curiosity you ever consider using Portland cement with this mixture

@nilamotk

5 жыл бұрын

I have considered it I thought it would be a good idea from the comments below there's a lot of smarter people there than I am and they say Portland cement not all that great. You have to keep in mind I don't do this for a living this is just a hobby in my experimentation that worked for me. I could not tell you with guarantee of Portland cement would work better or not I can tell you the brick made in the video is half-assed decent. It's not the best, it's not the worst... -- to be completely honest -- if you're just getting into The Foundry Hobby and want to melt some aluminum to see melted aluminum this is for you it's cheap. If you planned on casting engines from scratch or repeated use you should just go ahead and buy ceramic fiber insulation. It's a hell of a lot more expensive but lasts ten times as long as well and it's like one one-hundredth of the weight. My current foundary uses ceramic insulation.

"A circle has no corners" -nilamotk 2015 xD Sorry that made my day thank you.

@nilamotk

8 жыл бұрын

haha

what temp and how long in an oven to cure these type of bricks?

@nilamotk

7 жыл бұрын

a12vguru the hotter the better, the longer the better..

quick question, how does one bond two pieces of this together in a heat proof bond, say, like i want to make a 2 sided cast for metal objects. Is there any material that can be used to bond together through the same heats that this can withstand?

@DeathRogueTroll

8 жыл бұрын

+Devin Huie like if i wanted a re-usable 2 part mold

@nilamotk

8 жыл бұрын

reusable casting moulds are made of steel or so.some other metal. sand won't work for reuseable. you can bind 2 half's with refractory cement or you can mix some sodium silicate with some really fine powder of some sort.. (plaster?) and make your own "glue"

Hi there nikamotk How long does this brick mix take to dry out in the open air. Thanks

@nilamotk

8 жыл бұрын

it will not really dry in the open air. is needs to be cured with CO2 with dry ice or compressed co2.. otherwise it needs to be fired to be cured.

@devonfields10

8 жыл бұрын

+nilamotk thanks

Hey guy! You're a natural, get back to making videos. Everything's on point, thanks for saving me lots of time.

Hi thanks for the info much appreciated , I’d like to build a dual purpose wine barrel smoker and barbecue , had the idea of lining the inside of the barrel with a perlite sodium silicate mix about 1 to half inch thick to protect the wood from burning ? What are your thoughts or advise please - all the way from Cape Town ?

@nilamotk

4 жыл бұрын

I wouldn't use a sodium silicate mix that you make from anything food grade. My recommendation to you would be to spend a bit more money and purchase some ceramic whool insulation (kaowhool) it's available on Amazon. I dont know if the wood would burn or not. It still gets quite hot on the exterior when fires at 1500-2000* but you smoke isnt running at 2000*... so that's some trial and error on your half.

@nilamotk

4 жыл бұрын

You can purchase a rigidizer for the whool so it doesnt shed fibers. (Its sodium silicate basically) but check for compatibility with cooking.

@kirkgemmell5833

4 жыл бұрын

nilamotk thanks will ask around have seen that wool lining

If one makes the sodium silicate solution and has it in a glass mason jar with the lid on will it last for say a week in the jar? Will their be any negitive's to storing the solution for a week or more? Thanks!

@nilamotk

7 жыл бұрын

Turborewind I have had it stored for months on end. just don't let it dry out. if it does dry out just add some water and lightly heat it untill it's smooth again.

@turborewind

7 жыл бұрын

Thanks nilamotk ! Off to make me a batch for my propane tank furnace.Thanks again for your fast reply.

I think it should set for 7 days. This allows for the chemical reaction to set everything. The cement you used needs this to happen. I don't know if Liquid Glass needs time to cure???? I don't think so.

I've been researching how to make a cheap, but structural cast for a rocket stove and I'm pretty sure the temps won't get close to that of a foundry, none the less I still want to achieve high temp ratings in my cast. Do you think your mix would work well if added to perlite, and if yes, would you recommend a more slurry mix? I already have the perlite and am tracking down the lye and silica to make the water glass now. Any tips you can share will be greatly appreciated.

@yxcvmk

8 жыл бұрын

+Michael J I want to try the same and wonder how strong the perlite will be bound together. Am lacking the proper sodium silicate at the current time.

@MichaelJeffers75

8 жыл бұрын

+yxcvmk I poured my cast already for my rocket stove and learned a few things along the way. First, expect to use roughly 3 times more perlite than originally calculated by volume as that stuff really compresses. Also, I'm finding that mixing water glass with fire clay makes for a decent furnace cement. I'm giving my cast 48 hours till I remove the form, than another 4-5 days to air dry before firing it.

@yxcvmk

8 жыл бұрын

Thank you for the information!

@nilamotk

8 жыл бұрын

sorry for such a late reply. i wouldnt ever use a "slurry" with this mix, but in all honesty it doesnt matter if you use "too much" but a slurry is a bit exsessive. i believe the mix would crack if you mixed up a slurry.. and as for perlite compressing. you dont want to pack the mix too much if you add perlite. "insulation" is notbing but air... fiberglass, hold air, styrofoam, holds air... spray foam, perlite....etc.. tbey all hold air. if you compress too much, ypi are forcing the air (and insulating rating) out of the mix. as a pure sand mix, its a low islnsulating value.. if you where to melt cast iron, youd want alot of insulating value (like added perlite) but you dont want to force the mix down too much..

Just a thought, starting with clean sand should eliminate the need to mix the shift out. 🤔🤪😎

Hey awesome video thank you for sharing it as it's perfect for what I want to do. Also had my ass cracking up when you said I advise you not to go an cut up your moms pressure cooer plate

@nilamotk

9 жыл бұрын

Haha, my mothers yelled at me countless times for "borrowing" things from wherever.. So I thought I would point that out haha. Fortunately that's actually my pressure cooker, and it's not for canning jars, so I don't need the separator plates. They worked out perfectly. And I'm glad the video helped out, this should ideally be done with silica sand but I couldn't get my hands on it. Play sand works for most purposes but like I said, it should really be silica sand.. You can also get away with using perlite, if you need a really light mix, but it's really soft, and kinda fragile..

@nilamotk

9 жыл бұрын

Haha glad you like it

@LynxGenisys

4 жыл бұрын

@@nilamotk "pool filter sand" is silica sand, found mine at canadian tire, I would have been using play sand if you never said anything. You're the 1st person to mention it out of dozens of forge/foundry etc vids I've seen, and today, I'll be giving it a go! Thanks!

I like how you can tell how intensely you can expect the instructions are going to be when you have a verbatim "____ the shit out of it". This comes from someone who's not experimenting with their blend first on youtube. =D

What do you use to clean your flask?

@nilamotk

4 жыл бұрын

Hot water. If you let it dry in the flask you're in for one hell of a time.

I actually made my foundry out of cement and perlite... just barely been using it a month but seems to hold out pretty well... oh and I also used tie wire.

@casinogiant

7 жыл бұрын

I forgot to mention it's about 1&1/2 inches thick and can be glowing red on the inside but touchable on the outside.

@nilamotk

7 жыл бұрын

casinogiant be careful. if it's Portland cement it should be OK. regular quarts cement can explode at high temps.

@casinogiant

7 жыл бұрын

Can you expand your definition of explode. Do you mean literally explode like C4 or a different kind of explosion. Also what are the circumstances that lead to such an explosion.. in other words will the perlite negate these factors.

@casinogiant

7 жыл бұрын

Okay I believe I sufficiently tested the product. No explosion, the furnace is far less fragile then expected is and totally exceeding my refractory properties I expected. To add to that it was now found to be way less weight then previously made models. As I can easily transport it by myself.

@nilamotk

7 жыл бұрын

perlite may help with "explosion" and no.. not c4 style. more like "pop!" and a big cracked off piece.. the perlite is going to melt though, not really a bad thing as the cement will hold the air pockets for insulation... but perlite itself melts at a relatively low temperature on its own.

Great video! Gives me the information I need for a project I'm working out. Have you priced firebrick lately? That stuff is EXPENSIVE. I haven't priced the stuff in your video yet, but it's gotta be cheaper than $9 for a small brick. Anyway, on to my question. I am planning for a backyard foundry that will double as a family fire pit. What I am visualizing is an inner layer of your firebrick, then about a foot and a half to two feet of mud packed around it, followed by a layer of regular ornamental brick to hide the mud, and another layer of your sand formula on top to shield the mud from the rain, then a nice fire pit bowl on top of the cavity for the family. So, since it is going to be a serious pain in the butt to get into the firebrick layer to do repairs, I need to know how long I can reasonably expect this stuff to last. Could you help me out with that?

@dwightgordon803

7 жыл бұрын

Also, you mentioned in your video that this stuff can withstand "insane" temperatures. Could you give me a ballpark number there? Thanks!

@wjackstl

7 жыл бұрын

Dwight Gordon check craigslist free section for firebrick....if someone is remodeling/tearing out a fireplace, they are more than happy for you to come get their old bricks

@scootin123

6 жыл бұрын

Dwight Gordon fire brick @Tractor supply Company in the USA ( TSC ) is 3 dollars a brick . It's actually cheaper to buy the fire brick than to fiddle around with lower temp alternatives . It took me 4 months to realize that . I still seek alternative materials but to get going , shelling out the money for fire brick accelerates the process. On a rocket stove use the fire brick in the burn chamber or heat riser only where the temp. Is highest and line your building brick with this home made sand and sodium silicate stuff in constructing the lower temp hot air conductors don't use fire brick to line the feed port either . At least that how I do it but I did bit the bullet and bought 20 fire brick @ 60 dollars. Call it tough love

Awesome. Around what temp brought your mix to "red red hot"? Apologies if it's a repeat question.

@nilamotk

8 жыл бұрын

800C? gibe or take. it's wasn't actually physically measured.

@jeremiahshine

8 жыл бұрын

+nilamotk That's hot! keep up the good work.

@minecraftRULESAWESOM

8 жыл бұрын

For melting bras it get higher by about 100, today I used mine for the first time and without a proper lid it must've been about 950-1050 degrees Celsius, couldn't melt all the copper and had to rip it out of the crucible as it welded itself

@minecraftRULESAWESOM

8 жыл бұрын

+ON4331 brass*