Electric Arc Furnace?

I'm trying to make a furnace that can melt metal.  I've done a lot of thinking on it, and I decided that I'm going to make an Electric arc furnace for a multitude of reasons. I plan to use an arc welder as the power supply, with two carbon rods as the electrodes, creating an arc just above the crucible to melt the metal. I was wondering if anyone has done anything like this before?  I plan to have the furnace body made out of firebrick and refractory cement. Would this pose any problems? Also, how much strain does this put on a welder? Will it need to be shut off after a while due to overheating, or can it sustain it's own? Finally, How much power does a typical arc welder use? (in terms of watts) 

Asked by tylervitale 7 years ago  |  last reply 3 years ago



Hi, i have an idea for a more eco-friendly blast furnace.

 Its a simple furnace except with a top leading to a chimney (like a fireplace). Halfway up there is a change in the pipes, instead of going straight up, it leads slightly downward til it reaches a pool of water, where the pipe emits the smoke into the water. After wards the smoke will come out from the water and up into another chimney leading straight up to escape. Do you think the water would be able to clean at least some of the air impurities? Here is my picture for a basic idea. Comments and ideas are welcome.  P.S. -I got this idea from a bong (no i'm not a pothead nor have i ever tried).

Asked by TALLJ29 8 years ago  |  last reply 8 years ago


i want to power a small kanthal wire heating element ( more than a light dimmer can provide ?

Any help would mean a lot thanks

Asked by ideasandstuff747 3 years ago  |  last reply 3 years ago


How does this furnace work?

I just bought a "custom crucible furnace" from a local university's surplus department and I have absolutely no idea how to get it working. It is roughly 4 feet in diameter and 4 1/2 feet tall, it has 6 'coils' of metal attached in series with thick ribbon-y cable at the top. The side has a 'band' that sticks out but as far as I can tell it is hollow.From what I can tell it might be an arc furnace that something blew up in and damaged a bunch of the components. I really want to get it working as I've been saving aluminum cans for a long time and scrap metal so my plan now is to just hook up the cables to my arc welder and see what happens :) but if anyone knows anything about it or where I can go to get more info that would be much appreciated!

Asked by bravoechonovember1 4 days ago  |  last reply 2 days ago


Thermometer for furnace

OK I have created Shark500's furnace (which was an awesome Instructable). I have made some modifications to it. Now I'm curious can some one help me make a inexpensive thermometer for it? I have made mine a bit bigger and I am using a 16oz propane tank as my crucible with about a 1/2" thick cement coating on it and the top is my lid. I figure I could wire a sensor through the old valve but I don't know where to start to make something like this. could some one please assist me in this it would be greatly appreciated.

Posted by Jdogg55 10 years ago  |  last reply 10 years ago


how can i build an arc furnace from a microwave ?

Hello after wanting to build a tesla coil, but first reading up on how to make a HV output supply from a microwave transformer, then realising i want an arc furnace to melt pool salt(calcium chloride, or if possible, carbonate) in order to make calcium metal, or calcium carbide, via electrolysis what do i need to do, to build an arc furnance from a microwave transformer? clearly it seems very much able to generate an arc, with a significant amoutn of heat, but i dont know how to safely use it to do what i want. at the moment i already do own a microwave transformer, its fuse clips and all the other junk form the microwave transformer. i also want to know if its possible to melt lead with an arc furnace, as i want to do some lead casting wihtout using expensive propane.

Asked by oldmanbeefjerky 7 years ago  |  last reply 7 years ago


induction "furnace" from microwave transformer?

Hey guys I've seen around the net that it's fairly easy to make a spot welder from a micro wave transformer /micro oven transformer. So I was thinking if it's possibly to use the same idea to make a induction furnace? I would like to use it for melting/ casting aluminum (...and possibly metals with a higher melting point... if possible) any idea if it's possible.. and how to?

Asked by lordl9999 6 years ago  |  last reply 1 year ago


How to build a verneuil furnace for synthesizing corundum?

I've been researching the verneuil process for a good while now and I'm absolutely sure i could synthesize gemstones in my garage, the only problem is that I haven't the faintest idea how to build the device I need to do it. Aside form the few demonstration pictures I've found and a hand drawn sketch of the original furnace I can't seem to find any technical information on the design. Anyone have any ideas on how I could do this? http://en.wikipedia.org/wiki/Verneuil_process http://gemologyproject.com/wiki/images/thumb/e/ed/Verneuil.png/300px-Verneuil.png

Asked by -Chrimson_And_Clockwork- 5 years ago  |  last reply 2 years ago


Can I make an uninterruptible power supply for my furnace?

So, last winter, my area got TONS of snow, very cold temperatures ( I spent 20 minutes dropping droplets of water on an iron railing and literally watching it freeze), and then we lost power. Our furnace runs on natural gas, so it would've worked, except that the fan inside it and also the ignition system (I'm pretty sure) wouldn't work without power. I'm thinking of getting maybe 10 or so surplus marine/car 12 volt batteries and a high-power inverter, and running the furnace off normal 120 AC, until power goes out, then a relay ( or some solid-state circuitry) would trigger the batteries ( in parallel), which would charge either off of a solar panel outside, or wall power once the power was back on. Also, the furnace has what looks to be a pretty basic motherboard inside of it, would I need an inverter that makes a really sine-y sine wave for that, or could I get away with a cheap square wave one? Also, it's wired directly into its own circuit, though I'm pretty sure it's still 120 V. Comments, advice, etc. is welcome. Thanks!

Asked by mad magoo 9 years ago  |  last reply 8 years ago


Gas furnace plugged into 120V solar/wind generated power bypasses the thermostat control and starts immediately. Why?

The sine wave generated by my 12v to 120v inverter scopes even better than the grid current.  All other appliances function normally on off-grid power.

Asked by Twicewidowed 7 years ago  |  last reply 6 years ago


Ceramic toilet as a firepit? Has anyone tried this? Answered

Asked by Ronyon 8 years ago  |  last reply 8 years ago


Homemade Electric furnace current question

Good day viewers! I recently found out about the wonders of electric furnaces, cheap to run and no smoke. I went looking around for some designs, there are some nice i'bles about it and I got very exited since my neighbours already start nagging when I strike a match, an electric furnace would be the perfect solution. I decided to go with kanthal wire, its relatively cheap at a few bucks per meter, and it can handle temperatures up to  1300C. I plan to melt alluminium and maybe some brass so I should be fine with that. now to the questions part, I have an ATX PSU with a 12V 16A output (DC), I was wondering how many (centi)meters or inches for the americans under us, it could power (if I can power it it would eventually go up to full temp right?) I am a complete nitwit at these Ohms formulas and electric furnaces, at the moment I am abstaining from sleep to build this furnace and I am sure that others are as well. I hope some nice fellow diyers can help me with it. This could be a dumb questions, maybe I need a wall outlet (230V in my place) or maybe I need some rocket science. I don't know, do you? kind regards and a thank in advance from 2 young exploramenters that want to melt some metal without ruining our lungs. excuse us for spelling mistakes, this written by non-native speakers and with shaking hands,...

Posted by JStuyfzand 3 years ago  |  last reply 3 years ago


what is the max temp of the waste oil furnace?

Asked by lemra4 9 years ago  |  last reply 9 years ago


Want to know how to build a waste oil pre-heater for a waste oil burning furnace.

Who out there can tell me how to build an oil pre-heater for a waste oil burning furnace. I need to heat the oil so that it will atomize through a Carlyle AF 15 oil burner. Any help would be appreciated.

Posted by rattle09 10 years ago  |  last reply 5 years ago


How do I make an Induction Furnace?

I know the basic principle, but I can't seem to figure out how to design my own. If you know of any resources, those would help a ton :) The other thing that bugs me about induction furnaces is the size of the work coil.  Why are almost all of the work coils so small? (in turns)  It seems like the more turns the better, regardless of the power you're shoving through them.  The only reason that I could imagine is cooling, but I'm still clueless. Thanks I'bles! -muffin

Asked by T3h_Muffinator 8 years ago  |  last reply 8 years ago


Efficient House in Maine has no Furnace

This house in Maine has no furnace and will generate more power than it uses. With some extreme air-tightness and solar panels this is one super efficient house. It even has mood ring-style lights on the side to let you know how it's doing. Green is for Net-Zero use, yellow is on the border, and red for pulling more from the grid. Linkvia MAKE

Posted by fungus amungus 10 years ago  |  last reply 9 years ago


How could I make an igniter for a waste oil furnace/foundry?

I am making a waste oil furnace/foundry and don't want to have to use charcoal to ignite it everytime, so I am thinking of buying a 15000 volt neon sign transformer and using nails or tungsten TIG electrodes to ignite it. Would this work? I can't find any places near me which sell tungsten TIG electrodes? I was worried about using nails because I think they might melt from the tempature of the flame. Is that true?

Asked by snowluck2345 8 years ago  |  last reply 8 years ago


Oil Burning Stove - Waste Vehicle Oil Stove - WaterHeater - Outside Oil Fueled Furnace

I am looking for a decent incarnation of a oil burning stove/furnace/heater. My issue is this....when I load up my woodstove for the day, my house is cold when I return 9hrs later. I recall my father had a gravity fed waste oil stove/heater in his mechanics garage. he did not have to go feed it like his coal/woodstove. Thanks!

Posted by Tolting 5 years ago


Has anyone made there own smelting furnace and how did you do it?

I just need one to start my own mini casting house (my garage to be exact). I want to run it on gas and be hot enought to melt copper, brass , and aluminium. but only on a small scale to make castings for projects i have in mind. I know how the concept works but does anyone know any good tips eg what materials, how hot do it need to go, safety, and anyone how has expience in castings, making them or both.

Asked by jonjon1978 9 years ago  |  last reply 7 years ago


Can I combine my oil-fired forced air furnace & oil-fired domestic hot water heater? And then tie in solar heated water?

Currently, we have an oil-fired forced air furnace and an oil-fired domestic hot water heater.  I would like to combine the domestic hot water heater and the furnace somehow so we can heat them both by solar heated water from a panel on the roof, and use oil as a back up fuel.

Asked by cscott2008 9 years ago  |  last reply 9 years ago


Can a 30 gal steel drum barrel stove inside a 55 gal drum heat chamber be integrated into existing HVAC?

I want to make a wood burning stove in my basement using a 30 gal steel drum for the burn chamber. Now the interesting part: The 30 gal drum will be inside a 55 gal drum, which will be the heat chamber. Will I be able to use this setup to partially or fully heat the 2000 sq ft upstairs? I was thinking of using a below grade through the wall stovepipe kit with integrated cold air return hooked to the 30 gal barrel, and then attaching the 55 gal heat chamber into the existing HVAC ducting. I would create the burn chamber with one of the many barrel stove kits like those available from US Stove. Bonus question: if this is possible, can I double the fun with a tandem setup (side-by-side or stacked) connecting the outer 55 gal heat chambers with a duct?

Asked by sthain 7 years ago  |  last reply 4 years ago


How can you prevent Galvanic Corrosion? Answered

My parents bought a new green heater they've had repaired by 2 different guys in the past 2 months. The last one was a guy my brother knew; he said that it needed to be sanded, which I thought was a bit strange. It's beginning to act a bit funny again, kicking on, then going off. So I opened it up today, thinking that it was probably Galvanic corrosion from the way he talked. It seems as if a few companies are getting a bit careless in there designs. :-) So I opened it up and there was still corrosion laying on the bottom of the case from the first fix. He didn't even know what I was talking about. I read the Wikipedia article: Galvanic Corrosion. They mostly advise electroplating, which could get a bit labor intensive in this case. From what I understand, the idea is to separate the base metals, the anode and the cathode, from the electrolyte. In this case, it's the water vapor in the air. Wouldn't it just require some type of heat resistant coating to act as a barrier against water? Like some kind of spray on coating?

Asked by Vorenus 8 years ago  |  last reply 8 years ago


book on induction furnace

I have been looking for a book on how to design and build an induction furnace but without luck, would anyone please help> I need a book that explains in details things like how to design a circuit, component list and how to build?

Asked by srshpa 7 years ago  |  last reply 7 years ago


Battery over ride for electric start on Propane Furnace

I would like to create a battery override for the starter on my propane furnace. We've lost power a few times during some of the major storms. If I could backup the electric starter on the furnace with a battery backup, I could still have heat during any loss of power.

Posted by mmontana 4 years ago  |  last reply 2 years ago


i need help designing a coal furnace to reach tempuratures over 1300 celcius

Hello, after remembering my trip to sovereighn hill when i was 10, and remembering learning how gold bars were made during the gold rush, seeing that a small wood / coal powerd furnace( 1 Metre high 0.7 metres wide) made from clay , was capable of melting gold (melting point 1060 celcius), and having long discusions with my friend as to what method we were to take , in building a sodium furnace, i sugested we build a furnace and make our sodium metal using the deville process involving boiling sodium carbonate and carbon together then passing the metal and monoxide gas through oil. and we agreed on this as we could smelt metals with it also, make grinding media ect, and it would be cheaper than using propane. now that i have decided to make this furnace, based on what i saw when i was 10, i need help designing it correctly, so that it acheives tempuratures in exess of 1300C, the one at sovereigh hill i was told could reach 1500C. at the moment, my idea is that i can build the furnace 1M high and 50cm wide (roughly ), out of bricks and mortar, then fuel it with coal, eventually after being pre ignited by wood. at the base, i plan on having a small vent which i will pump air into using a small inflatable matress inflator, to supp,y the furnace with air. at the top it will have a small round hole in which i will insert things to smelt, which lie inside a ceramic pot .in the case of making sodium via deville proccess, it would have a steel pipe sealed off at the base, reduced at the top running nto a deep cooled oil bath also at the top, there would be two small vents to allow air flow as there air must go somewhere being pumped in. what i need to know, is if htis will work, and if i need to place my ceramic pot right inside the furnace, or just partially in it, as in the diagram of my design. i am asking all this as i have no idea if it will work at this small size, and because i have little experience or knowledge of the potential tempuratures that can be acheived.

Asked by oldmanbeefjerky 7 years ago


Lost Foam?

Hi guys, I've been messing about with lost foam aluminium casting here in the UK. I've tried packing expanded polystyrene, and Jablite but they seem really difficult to get a good finish on the foam patterns. I want to be able to machine them, or use them in a basic foam lathe. I know that in the States they have a denser finer grained insulation material (blue and pink in colour). These both seem to be better for obtaining surface finish. I've tried to Google the stuff over here but it seems to be silly prices. Does anyone have any links to UK sites that sell a similar product? I was wondering if the harder stuff that you saw up and stick between the rafters for loft conversions would work as this seems a much denser fine grain foam to me. Any ideas or advice would be appreciated.

Posted by marshon 8 years ago  |  last reply 8 years ago


what would it cost to replace an electrical door switch on a 1983 furnace?

The switch went out so there was no elec. getting to the furnace to flip it on

Asked by caluME 7 years ago  |  last reply 7 years ago


Smelting

Any advice on what to use as a crucible on my 'open flame' gas furnace? It seems that ferrous materials are to be avoided.

Posted by UK_smelter 10 years ago


How do I adjust the pilot light on an older Intertherm Furnace?

I have an older Intertherm Furnace with a Unitrol controler Model 110ER and I need to turn up the pilot light on it.  It was working perfect, never going out. Then this summer the my propane company replaced the pressure regulator on the tank and since then I have had a problem with the furnace staying lit. It appears to be getting blown out sometimes when the main burner lights. The gas does not light immediately but instead delays and builds up a little and then when it flashes it blows itself out. So I need to turn the pilot up. I have spent hours doing searches but I have not found any manual or instruction on how to turn up the pilot in this model. Anyone have an idea as to which screw to turn and how much?

Asked by Vyger 4 years ago  |  last reply 4 years ago


How do I figure out the cost differential between turning on an inefficient furnace and using oil-filled space heaters? Answered

The big deal is that this furnace also heats the upstairs unit of a duplex, which i also own and rent out to my brother in law.  the deal is that he spends maybe 5 nights per week at his girlfriend's house.  so, if i turn on the furnace, all of the heat that goes upstairs will be wasted.  i'm interested in learning how to measure energy usage and learning how to determine the usage difference between running the furnace, which is about 50 years old and runs at about 50% efficiency and three pretty standard 7-fin oil-filled space heaters.  the flat in which i live is about 800 sq.ft. and the upstairs space is about 600 sq.ft.  the windows are old, but are covered with plastic shrink film for better insulation.

Asked by hobbssamuelj 9 years ago  |  last reply 9 years ago


Reclaiming Wasted heat to make electricity

I work in an aluminum casting facility and we're looking for ways to save energy etc... one thing that we've got no shortage of is heat (during the summer the temp near the ceiling above the furnaces is over 230F) i've looked into stuff like they do in steel mills in Germany where they run pipes through the furnace linings and then use the heat from the furnace to make steam and run steam generators. but i was thinking of something else today. would you be able to just mount a bunch (or one huge) peltier exchanger (or whatever they're called) on the ceiling above the furnaces and use that to make electricity? i'm aware that they create electricity because of temperature differences (and not specifically from being hot or cold in general) so would we have to cool one side of the unit for maximum efficiency? are there any other ways that anyone knows of to turn waste heat directly or indirectly into electricity?

Posted by crapflinger 8 years ago  |  last reply 8 years ago


making a (more) permanent mold from cement/concrete for aluminum castings?

Hey I've been looking into aluminum casting for a while now (done it once or twice with different "furnaces")  Now I'm reading alot about lost foam casting (sounds interessting too) But I was thinking; do you think (/have experience) that I could make some kind of "permanent" mold out of some kind of cement/ concrete/ fireclay mixture for casting similar pieces several times?? I was thinking, when you make the furnace(s) you make a cement/ concrete/ fireclay mixture that can withstand the temperature, so shouldn't it be able to withstand the temperature of the aluminum being poured into it also? (and therefor be able to make the mold out of) - I was thinking to use a special type of cement ment for use around a fireplace. What do you know/ think of the idea? - and also; is there any (other) cheap/ "easy" way to make permanent molds for several similar castings? (at home/ the backyard) PS. not important but I've made/ used a coal fired furnace, a gas (butane) fired furnace and now I'm about to build an electrical furnace (for the sake of expence and time of heating up)... I'm trying to make some casting sand/ green sand, but the ingredients looks to be rather difficult for me to gather (In Denmark Europe)

Asked by lordl9999 6 years ago  |  last reply 6 years ago


Building a Foundry?

So I've been experimenting with building a mini foundry made out of steel cans. I've experimented with several different fuels, fuel injection systems, oxygen injection systems, crucibles, and different metals. However, the only metal I've ever been able to melt with it is zinc. (if you don't know, zinc doesn't take alot to melt; only about 700F) My target metals are aluminum and copper, but despite over a year of experimenting, I've never been able to melt either. I would like to know what I'm doing wrong, or what I could do better. Here's the rundown of the furnace's construction: The fuel I'm currently using is propane. The foundry isn't big, (you could fit it in a backpack) so I just use propane canisters for torches with a normal output line on the end. The line runs to a small piece of glass laboratory tubing with a tiny nozzle on the end which is about 1 mm in diameter. The propane shoots out as a stream and mixes with air utilizing the venturi effect. The propane mix then shoots into a large metal pipe about 2 cm in diameter. It then bends up at a 90 degree angle and enters the furnace, which is in essence, a steel can with a hole in the bottom. inside this is a steel can cut in half with a thick wire through it to suspend it above the burner.  So what could be improved? When I run it at full blast, the whole furnace glows orange, but no metal melting happens...

Asked by tylervitale 7 years ago  |  last reply 6 years ago


Forge refractory?

For a forge i am making i used permilite (or w/e it is called used in gardening) and furnace cement for the refractory...how long will it take to cure?

Asked by trf 9 years ago


How to make a Cheap transformer for a project? Answered

I need to make a cheap step downtransformer for making a small arc furnace....i saw the project on youtube and the link is given below https://www.youtube.com/watch?v=JIlZsuRc9jQ...i used carbon rods from AA 1.5V cells and i need a transformer that can be made from home available items like wires from dc motors and tube light chokers ...please give me details about materials required and the method of constructing

Asked by ShwetangP 3 years ago  |  last reply 3 years ago


Cleaning up 60+ years of oil furnace chimney soot? Answered

The chimney is gone, leaving a large (about a bushel sized ) heap of oil soot on a concrete floor.    Some has been shoveled up along with the mortar dust.  There remains about a bucketful spread around a 1.5 meter square area... plus foot and paw prints over a larger area of new concrete. (I will be checking soon to make sure everyone and the dog are OK.) So what is the right way to contain this mess and get it safely out of the house?  

Asked by mole1 2 years ago  |  last reply 2 years ago


Does anybody have a set of plans for a downdraft sanding table using an old furnace blower?

I have seen numerous 'threads' and discussions on the subject, but no PLANS other than a few pictures.

Asked by GrumpyOldGoat 8 years ago  |  last reply 8 years ago


How would i compress hydrogen gas into a propane-type bottle? Answered

Im trying to store hydrogen into these propane bottles so i can use that instead of propane to fuel my foundry furnace.

Asked by GalaxyX 9 years ago  |  last reply 5 weeks ago


i want to make a thermoelectric generator but im confused in building material and construction

Thermoeletric generator like a furnace outside of which a generator is installed but i could not find the right element which sense even the small amount of heat.  suggest something about that.

Asked by jitin bakshi 5 years ago  |  last reply 4 years ago


Has anyone ever made a room furnace with a light bulb? I've heard of using light bulbs contained in a metal box. Answered

Any ideas. This principle could work along the same lines as an oil hot water heater pumped through a radiator (you know those 300 lb.+ radiators from older houses), but using the bulb in place of the hot water.. If it was portable, that would be great. I could make a nice cover or wood cabinet around it myself. What would be a good metal to line it with that could magnify the heat of a light bulb. Obviously, this would need to be a safe product. Getting a little warm on the outside is not a problem in our home. I mostly just need some idea as to what metal to use to magnify the heat of the bulb. Thank you in advance for any help or ideas.

Asked by Lori216 7 years ago  |  last reply 7 years ago


What is a recipe for refractory cement in small amounts?

Https://www.instructables.com/id/Mini-Charcoal-Furnace/#step1 This has me wanting to make my own foundry, however i can't find how to make refractory cement, and nutandbolt doesn't list his own recipe. Alternatively, Where can I buy refractory cement in Australia?

Asked by Nagarok 7 years ago  |  last reply 7 years ago


Shop dust collection, computational fluid dynamics HELP needed

My plan is to build a shop dust collection system (probably two stage) using a house furnace blower as the "blower" for the system. They are cheap, readily available, quiet and multiple speed. The help I need is the design/ sizing of the collection bag. Thanks for your help, Carpe Ductum

Posted by naic98 11 years ago  |  last reply 10 years ago


whats d temperature needed to melt soda cans? how good r they for investment casting? Answered

Simple. i want to  melt these cola cans (and beer cans too ! ) so i can use it to cast some stuff. interested mainly in investment casting (lost wax method). need to know the temperature. precautions and possible cases of going wrong. i have an  electronic muffle furnace. if it helps.. regards,  Chakra

Asked by chakra 8 years ago  |  last reply 8 years ago


Setting up two forges...

Basically I have two ideas, one of which I'm pretty ready to make now and another which will take a little longer to make, one is a tiny forge, like desktop sized, for working at home and the other is a much larger forge for big metalwork projects, thankfully the large one will actually require less parts scavenging as I have plenty of acces to scrap material and there's a brickyard over the wall from us which will do me the necessary materials very cheap, mainly because I did a little forklift driving for them for larger heavyweight loads over three tonnes. That's all well and good a big one I can get my head round easily enough, But. How would I go about making a tiny forge and I mean miniscule, it's main purpose is for heating to cast for my specialist parts I prefer making and the other is for low material single cast jewellry my mum makes (she used to own a jewewllry business and still makes the odd bespoke items. But my main question is how I can build a reliable yet compact forge and furnace, from what I have sitting around I'm sure I can come up with a decent fuel source, ranging from butane torches and stoves, both of which can do propane and I could go to natural gas (we have a special plug out the back for gas barbeques the house had it when we came...) but my other questions are a bit more odd, first of all what would make a great crucible, I need something that'll be fairly invincible to the hardships caused by life, as the other liely user of the forge and furnace is very forgetful and sometimes accident prone. Next up is the housing, would it be feasible to use a single block of thermocrete cast to make the main furnace housing, as in everything is but the fuel and air source holes and the crucible hole would be one block, as it stands that seems like the best way to make it simple and effective, plus it would be pretty airtight where needed. Next question is the fuel and temperatures, I know that butane at full combustion get 1300C and 1000C is a practicable operating temp. for a butane item but what about propane or even natural gas, since it would be very cheap and clean burning... I'm a bit of a noob towards this end of the scale, I can make stuff hot and I can do alot with these things but actual forge and furnace making is a little beyond me on this scale, however I can think of several advantages to my baby furnace, including the practical movement of it, as it could be self contained very easily. The pic was just one of the last pictures that's remotely intersting I uploaded, however it raises it's own points as the jet engine basically welded all it's components forward of the flame together.

Posted by killerjackalope 10 years ago  |  last reply 10 years ago


Old oil heaters? Answered

Just wondering if anybody knows of any links or anything for the cleaning, maintenance, and lighting of the old free standing oil heaters? Not the kind with blowers and ignitors, just the basic ones that people used to use to heat their houses and such. I have one in my garage from an old railway caboose and would like to use it on occasion in the winter, but the only info I can find on the net is for oil burning furnaces... A totally different animal. Thanks in advance!

Asked by Stew2 9 years ago  |  last reply 3 years ago


Substitute for Boron in p-type semiconductor?

I am trying to think of ways to make solar panels from scratch.  I can get phosphorus from pee, silicon can be extracted from the rocks all around me, but I don't have naturally occurring boron nearby.  What are some substitutes that can be synthesized from the world without modern factories or laboratories?  Furnaces are not out of the question.

Asked by tincanz 6 years ago  |  last reply 6 years ago


Thermocouples?

I have a multimeter which has a thermocouple I can plug in to get a temperature reading. I really like the thing, but the thermocouple itself isn't all that robust. Although the meter is capable of reading temperatures up to 1850F, I doubt the thermocouple would last long at only 400-500F. My question is, is it possible to buy another thermocouple and use it in place of the provided one and still get fairly accurate temperature readings? I was thinking of maybe using a thermocouple normally used in furnaces or hot water heaters.

Asked by tylervitale 7 years ago  |  last reply 7 years ago


We recently moved into a duplex and over the last month an odd smell in bedroom that resembles a chemical. Suggestions?

The odor is primarily in the master bedroom and is more noticable now that the windows are closed and furnace is being used.  Do not smell it anywhere else in the house.  The smell reminds us of what rail-road ties smell like, the creosote specifically.  Am worried that it may be something serious and cause more difficulty with my breathing (I suffer from allergy induced asthma) and do not want to have to any issues.

Asked by TLAdams 6 years ago  |  last reply 6 years ago


Hi, I live in a crappy room in a basement and desperately need help arranging the cramped space.

1. space for upright exercise bike 2. sewing/craft area 3. desk for studying 4. bed - I would love to have something bigger than a twin 5. storage! (no dresser) I'm semi handy also :-) The big square is a  furnace.  the tv sits on three 2.8" shelves which hold my clothes and random sewing projects. Thank you!

Asked by melaniemelanie 9 years ago  |  last reply 8 years ago