Oui, c'est vrai. J'ai visité, pour raisons professionnelles l'aciérie électrique de Thionville, site Usinor, avant sa fermeture. C'est vraiment l'enfer ! 👀👀
My wife and I are very happy with our new arc furnace that precisely fit in our new apartment. We are going to build a conveyor belt from the furnace through the wall in the kitchen. My wife can be in the kitchen while I work in the living room. It is great that I can work from home with my Arc furnace.
I will try but there is almost no room to film and get good videos. We also didn't take into account all the heat that is produced. Our electric bills are sky high. Still it is all worth it.
I run a air conditioned crane in a steel mill melt shop, now that's cool! I have also worked on a EAF crew as the helper, if you only knew just how hot it is. LOL! Just imagine it's a 95' degree day out side and your running a EAF that's melting scrap steel to a boiling point of just over 3000 degrees. Your wearing a helmet, face shield, thick fire retardant uniform "long sleeves" and aluminized splash protective full length over coat and gloves. Few have experienced such heat!
Been working around EAFs 20+ years and never a dull moment, lol. This is one of the better vids I've seen, gives a pretty good idea of how intense steelmaking is, but as most will agree, nothing compares witnessing it in person.
This is part of the second charge to melt scrap steel into liquid steel. The steel gets tapped off into converters and go in the ladle furnace where it is melted with added minerals to get the quality required, stainless or lower grade as used for rebar. The billets go to the rolling mill, get heated up to 1200 °C and rolled into rebar or fencing wire.
My Dad worked for ASARCO and took me for a tour when I was a kid. There I saw a massive ARC furnace melting copper to form wire bar. Very interesting process and noisy. Thanks for the video. It brings back memories of the day I decided not to work in a copper refinery. LOL
These arc furnaces are used to melt scrap steel. This one melts about 25 tonnes as end product of raw liquid steel, in 3 lots. Then the steel is poored over to an other vessel and goes into a ladle furnace to get the correct grade of steel required for end product by adding additives. The temperature of the liquid steel is above 1535° Celcius.
I had to laugh at the casual radio as well while that furnace is happening 😂 If i would build such furnace i would be scared to death when it shows such violence 😂
It's crazy how that amp meter bounces up and down like 200 amperes multiple times a second @ 33kV :D The stuff going on there is so incredibly violent.. truly scary :-)
As loud as a jet engine although the pitch is lower at 50 Hertz with explosions, especially when the scrap steel is wet. The arc is around 3000° Celcius
@ChumpusRex You are correct, some sensitive people in certain parts of town 20 kms away can notice through flickering lights when the furnace start up. They are feed from the 110 kV line downstream of the furnaces
After this process the iron is tapped into an other vessel which goes to the laydle furnace where additives are added. Then it goes through the caster from where the billets are cast at the end of this clip. That one runs at about 10,000 Amps 300 Volts.
Yes, double layer of heat resistant clothing, welding helmets , the lot. The controlroom has a drop down shutter going in front of the windows to reduce radiant heat when recharging an extra load of scrap steel in the furnace and when the furnace lid is open. Even as an electrician working there in the operational zones you wear double layers of clothing. very hot.
And then a lot of people turn their 40 watt light off at home to save the environment :D Where i work there is 1km2 of factory with fluorescent lights every 4 meters, and like 50 machines running 24/7 at many hundreds of amps each @ 400 volts, fed by like 10+ 10kv transformers. It's crazy how much energy industry uses. It's up to them to make the real deal in energy savings. It are good intentions of private persons, but turning off your single light doesn't matter a single bit for nature (maybe 4 dollars on your electricity bill though :-) ).
Great shot brings back so many memories from Florida steal from 80 to 96I love the shot of the continuous caster at the end that was cool again thank you
ammeter bars in controlroom read k Amps. from secondary side of TX which is about 330V , 42000A. Look at EAF busbar clip which shows actual TX nameplate.
@yourTIV0 Those arms are hydraulic controlled and lifted and lowered to maintain a steady arc. Especially when not all steel has melted a lot of movement is visible.
I cut up a furnace transformer that ran one of these furnaces at the locomotive wrecking facility behind EMD in McCook Illinois back around 1999. It was well over a megawatt of power (megavoltamp to be precise) to run this kind of furnace! the conductors coming off the top were just huge! It was stepped down off of, if I remember, something on the order of 44,000 volts!! The inbound amperage was something on the order of only maybe a few hundred amps. it looked ridiculous to see the small wires on the input, compared to the cables coming back out!!! The copper content in that transformer was in the thousands of pounds!!! They say it was hauled in by rail, on a special railroad car that was actually a part of the transformer, and then detached!!
I will attest to your view on steelmaking 100% I work in the melt shop at Gerdau. It's deff not a job for most people! My advice to anyone starting a new job working on a crew running a steel arc furnace. 1.Always know were the overhead crane is, never be under a ladle or load! 2.Stay clear when charging the furnace! Keep your head in the game and on a swivel. Don't bother applying if you can't handle work thats ass busting and very hot most the time. It's a job that does pay pretty good money!
wauw!! that's a lot of current. You are right there these machines are very dangerous, especially when wet iron or scrap is dumped into the furnace. Explosions of liquid steel erupt.
@soundseeker63 A carbon arc can be struck at around 55 Volts. the 300 to 400 Volts range at high amperage works well and is most efficient kWh / Ton wise.
It is the heat of the arc burning the carbon and melting the steel. It is around 3000°C at the arc. You may need to google for the inert atmosphere part of your question.
This is awesome,I worked in a foundry in Scotland for 15 years and we had one of these beasts too.Wish i had taken footage of it.Its an amazing sight seeing the charges going in and the initail switch on.Rb Tennents was ourcompany name and were taken over by Sheffield Forgemasters.We made steel rolls for rolling mills world wide.Anybody know of us?
@jmartis2 - Actually, I am correct. VA, while affected by reactivity is a separate measure. Regardless of how many inductors, capacitors, etc you put in a circuit or how you modify the phase, VA is VA. This is because DC has a stationary wave form so it's power factor is constant. 10vdc*10a=100W period. 10vac*10a*cosθ=70w. This is because AC voltage changes with the waveform. :)
Yes your plugs can help but you also at the realized how extremely extraordinarily loud that is it would literally or hurt your ears painfully without any type the hearing protection at all I wore your plugs and ear muffs that were attached to my hard hat. I cannot express enough how loud that is in you feel the noise in To your Chest. Also the fabrication process of cold steel is forest sharing it from the rolling mill and in fabrication is extremely loud rolling a 100 pieces of rebar 300' long on a roll line at steel is very loud and we had a huge guillotine sheer they could cut about 60 bars at a time depending on the diameter. Great work and I loved it my message like hell I wish I could go back to it tomorrow.👷♂️😎👋😸
The ammeter is designed to handle that abuse, It has been on that panel for many years and is for coarse indication. Glycerine gets put in pressure gauges, never seen it in an ammeter
My late uncle, Jim Laroche worked at Head Wrightson in Middlesbrough on Tees. He took me to the steel works for the day and I saw the steel being poured and my uncle testing it. A small quantity was poured and if OK he gave the go ahead to proceed. I will never forget it. That would have been around 1958. J.
Hi, it is all computer controlled. not to sure what type of controller is used, I will try to find out. The current is sensed at the primaries of the 33 kV furnace transformer. The computer controlls the height of the electrodes.
If you mean the furnaces... Danieli in Italy, VAI Siemens/Fuchs in Germany, Tenova in Italy (part of the Argentinian group Techint). I'm sure there's more, but those are the names I know. There are other companies that make all the 'add-ons': "More" (mor-AY) burners and injectors, Flohe electrode arms, UCAR roofs, etc.
@DxcBones That's a pity. It is really no state secret to see how an arc furnace operates. 3 electrodes in scrap metal with a lot of noise and heat. Thanks for your reply.
That Mariah Carey's 'Always Be My Baby' is the soundtrack in the control room radio to this epic industrial violence is pretty much the coolest thing ever.
First time I heard this noise I was delivering a flatbed load of limestone to Nucor in Utah. At first I thought the mill was blowing up. Then I realized it was just the world coming to an end. scary...
Well... There's a lot of burnable equipment and services around it: cables for sensors, hoses for hydraulics, oxygen, gas and carbon powder... What would cause the most damage is a water leak. The whole top half of the furnace is water-cooled. Water would turn the magnesite lining of the furnace to mush and the liquid metal would go straight through. Or, if a build-up on the inside of the furnace became waterlogged and then fell into the molten pool, the explosion would destroy the furnace.
The meters are reading the primary (input) voltage and current from the electricity supplier. The output voltage from the EAF transformer to the electrodes is much lower,up to 1500 volts ,but the current is much higher.42000 amps is quite usual in these furnaces.
the ampred monitoring system is actually correcting the auxiliary side of the systems kV threshold, therefore creating a polar disconnect between the two opposing voltages as you can see.
@karlsruheprotestful A comparison: a cruising 747 generates approximately 60MW of power - this is enough to melt 2-and-a-bit metric tonnes of steel a minute. A 747 at takeoff generates approximately 140MW of power - now you can melt steel at around 4.9 tonnes per minute. The largest arc furnace in the world, a DC continuous-charge model in Tokyo, uses 320MW of power - 2x 160MW transformers, one for each phase.
Place the graphite electrode into the electrode holder *securely*. Make sure you are wearing ALL YOUR PPE for welding. Turn the power on and bore into the crucible... Things to note: the carbon electrode will get very hot - white-hot - very quickly. If you can somehow drip water onto it at the top of the stick, it will make the stick last longer. Be aware of flying metal droplets.
@denelson83 - A voltamp (VA) is a measure of power, like a watt, but in an AC circuit. In AC the voltage is constantly changing between a postive and negative value which means the circuit is only at peak power for a fraction of total time where a DC circuit stays at the same voltage. So the difference just allows one to compensate for that fact.
@sayrith The arc amongst the carbon rods melts the steel due to the 10,000 C temperature of the arc being just above or even in contact with the steel.
@@wolfcatsden PFft. Smoked meat for days. The factory won't be able to clean up the stench or the remains. It'd ruin the metal, too. But the question is, just how fast will it cook a chicken tendie?
So what is all the smoke coming off from and where does it go from there? What is the arc on the left at 1:02? Also, why is one type of phase used over another? e.g. Delta or Wye? Lastly, what is the peak current drawn? I've watched this video many times the last few years. I still can't believe someone actually is walking past it lower left at 0:21. This video keeps me, as a Electronic Engineer & CS grad and knife maker (also into metallurgy) very interested. Thank you VERY much for sharing this! God bless!
I operate a 3 phase arc furnace at the factory where i work you run 3 times the power we run to melt our fused cast refractories. I usually run about 18000 amps at 240 volts over a delta wye on the high end load. love your vids though :D
That current is sure erratic. I wonder if the neighbours complain of flickering lights? I know when I lived in a Steel town you could tell when someone started up their EAF because the lights in the whole city would flicker. If 2 EAFs in the town where running at the same time, it was positively headache inducing.
@1krr Nope, you have both W and VA in an AC circuit and they are the same only for unity power factor. When the power factor is less than 1, the V * A is less than W in the circuit. This might be caused either by reactive power (capacitive, inductive) which results in a phase difference in V/I, and/or a distortion of their waveforms. For example when you connect a capacitor to an AC source, it draws amps, there are volts of it but the watts are zero.
@RasterGraph There's a big integrated steel mill near where I live and they are the same way, no cameras no outsiders no nothing. Eventhough it is still the same 1950's technology in the plant.
That's Powerful. The one at SSM in Sterling, IL is super-impressive, and is powered by regular utility power, provided by our fine Nuclear Power Plants. Nothing says I shit my pants like watching this thing go from 0 to Continuous lightning strikes in .3 seconds.
The sound you hear in this video is a mere shadow of the real thing. Safe when done right. Safe as "lightning in a bucket" can ever be.
It’s deafening. As a career substation technician it’s the most frightening sound ever. Of course that sound means “normal operation” for an EAF.
Yes, the sound on real terms is more than 120 decibels.
Oui, c'est vrai. J'ai visité, pour raisons professionnelles l'aciérie électrique de Thionville, site Usinor, avant sa fermeture. C'est vraiment l'enfer ! 👀👀
Between 27KV to 270KV....
That's a god damn lighting⚡
My wife and I are very happy with our new arc furnace that precisely fit in our new apartment. We are going to build a conveyor belt from the furnace through the wall in the kitchen. My wife can be in the kitchen while I work in the living room. It is great that I can work from home with my Arc furnace.
+nattsurfaren Please share a video when you get it all working properly.
I will try but there is almost no room to film and get good videos. We also didn't take into account all the heat that is produced. Our electric bills are sky high. Still it is all worth it.
Whatever keeps the in laws away, right?
You have to work on them to understand what it's like to be in hell
Arc Furnace by Westinghouse, "The quality goes in before the name goes on!". wait.
I run a air conditioned crane in a steel mill melt shop, now that's cool! I have also worked on a EAF crew as the helper, if you only knew just how hot it is. LOL! Just imagine it's a 95' degree day out side and your running a EAF that's melting scrap steel to a boiling point of just over 3000 degrees. Your wearing a helmet, face shield, thick fire retardant uniform "long sleeves" and aluminized splash protective full length over coat and gloves. Few have experienced such heat!
Been working around EAFs 20+ years and never a dull moment, lol.
This is one of the better vids I've seen, gives a pretty good idea of how intense steelmaking is, but as most will agree, nothing compares witnessing it in person.
This is part of the second charge to melt scrap steel into liquid steel.
The steel gets tapped off into converters and go in the ladle furnace where it is melted with added minerals to get the quality required, stainless or lower grade as used for rebar. The billets go to the rolling mill, get heated up to 1200 °C and rolled into rebar or fencing wire.
My Dad worked for ASARCO and took me for a tour when I was a kid. There I saw a massive ARC furnace melting copper to form wire bar. Very interesting process and noisy. Thanks for the video. It brings back memories of the day I decided not to work in a copper refinery. LOL
As Photon says, Big boy power supply.
These arc furnaces are used to melt scrap steel. This one melts about 25 tonnes as end product of raw liquid steel, in 3 lots. Then the steel is poored over to an other vessel and goes into a ladle furnace to get the correct grade of steel required for end product by adding additives.
The temperature of the liquid steel is above 1535° Celcius.
In the control room its a cup of Earl Grey and the hits of yesterday and today on the radio...meanwhile outside the door.... ^oo^
I had to laugh at the casual radio as well while that furnace is happening 😂 If i would build such furnace i would be scared to death when it shows such violence 😂
I build control panels for these arc furnaces. Amazing to see it in action. Thanks for the upload.
130 - 140 dB.
Need hearing protection when it is running.
Where are you from?
I'm from México San Luis Potosí and we are mounting one eaf that this was from Nueva Zelanda
🤣🤣🤣🤣
It's crazy how that amp meter bounces up and down like 200 amperes multiple times a second @ 33kV :D The stuff going on there is so incredibly violent.. truly scary :-)
2000amps, I think it's a 1:10 meter
@@aae7725 Why wouldn't they switch the back plate in that case? Shouldn't take that much effort to switch it out with one that shows the right values
As loud as a jet engine although the pitch is lower at 50 Hertz with explosions, especially when the scrap steel is wet.
The arc is around 3000° Celcius
The transformer is rated at 40 MW, the furnace is mostly used at between 20 and 30 Megawatt capacity to melt up to 40 tonnes in 3 charges.
correct, for the initial start they are lowered by the operator, then controlled via the computer to maintain the best arc.
Mariah Carey + Electric Arc Furnace @ 1:18. Love it :)
@ChumpusRex You are correct, some sensitive people in certain parts of town 20 kms away can notice through flickering lights when the furnace start up.
They are feed from the 110 kV line downstream of the furnaces
After this process the iron is tapped into an other vessel which goes to the laydle furnace where additives are added.
Then it goes through the caster from where the billets are cast at the end of this clip. That one runs at about 10,000 Amps 300 Volts.
Yes, double layer of heat resistant clothing, welding helmets , the lot. The controlroom has a drop down shutter going in front of the windows to reduce radiant heat when recharging an extra load of scrap steel in the furnace and when the furnace lid is open. Even as an electrician working there in the operational zones you wear double layers of clothing. very hot.
@Snoep76239 Correct 33,000 Volts and between 400 and 800 Amps.
Secondary current varies between 40,000 and 50,000 Amps at 300 to 500 Volts
That is probably the coolest thing I've ever seen.
it is damm cool would like to visit one arc furnace
Likewise, double hearing protection is a must to survive the noise of the arcing.
That 150 ton is a big one allright.
Spectacular fire works when the iron scrap is wet in the second and third charges.
Electric arc furnaces have always facinated me.
And then a lot of people turn their 40 watt light off at home to save the environment :D Where i work there is 1km2 of factory with fluorescent lights every 4 meters, and like 50 machines running 24/7 at many hundreds of amps each @ 400 volts, fed by like 10+ 10kv transformers. It's crazy how much energy industry uses. It's up to them to make the real deal in energy savings. It are good intentions of private persons, but turning off your single light doesn't matter a single bit for nature (maybe 4 dollars on your electricity bill though :-) ).
I agree
Great shot brings back so many memories from Florida steal from 80 to 96I love the shot of the continuous caster at the end that was cool again thank you
Thanks for the compliment. I do get around some interesting sites.
ammeter bars in controlroom read k Amps. from secondary side of TX which is about 330V , 42000A. Look at EAF busbar clip which shows actual TX nameplate.
@yourTIV0 Those arms are hydraulic controlled and lifted and lowered to maintain a steady arc. Especially when not all steel has melted a lot of movement is visible.
More clips with detail coming soon. Just managed to take some good footage today, while waiting for parts to fix a leaking spare EAF transformer.
I cut up a furnace transformer that ran one of these furnaces at the locomotive wrecking facility behind EMD in McCook Illinois back around 1999. It was well over a megawatt of power (megavoltamp to be precise) to run this kind of furnace! the conductors coming off the top were just huge! It was stepped down off of, if I remember, something on the order of 44,000 volts!! The inbound amperage was something on the order of only maybe a few hundred amps. it looked ridiculous to see the small wires on the input, compared to the cables coming back out!!! The copper content in that transformer was in the thousands of pounds!!! They say it was hauled in by rail, on a special railroad car that was actually a part of the transformer, and then detached!!
I will attest to your view on steelmaking 100% I work in the melt shop at Gerdau. It's deff not a job for most people! My advice to anyone starting a new job working on a crew running a steel arc furnace. 1.Always know were the overhead crane is, never be under a ladle or load! 2.Stay clear when charging the furnace! Keep your head in the game and on a swivel. Don't bother applying if you can't handle work thats ass busting and very hot most the time. It's a job that does pay pretty good money!
wauw!! that's a lot of current.
You are right there these machines are very dangerous, especially when wet iron or scrap is dumped into the furnace.
Explosions of liquid steel erupt.
@soundseeker63 A carbon arc can be struck at around 55 Volts.
the 300 to 400 Volts range at high amperage works well and is most efficient kWh / Ton wise.
BB Amps at 32-33kV.
Amps x 100 at 330 Volts which is at the electrodes, so between 20,000 and 60,000 Amps
Varies between 400 and 500 kWh per ton.
Multiply that by 50 tons and that is power consumed in one hour.
This is continuous current, a lightning strike lasts 1 second at the most.
Voltage levels are different though
It is the heat of the arc burning the carbon and melting the steel. It is around 3000°C at the arc.
You may need to google for the inert atmosphere part of your question.
Worked in a foundry for 12 years...the best I can describe it is a small volcano indoors.
@femix26 Intense, very hot and extremely noisy
Thanks for your comment.
This is awesome,I worked in a foundry in Scotland for 15 years and we had one of these beasts too.Wish i had taken footage of it.Its an amazing sight seeing the charges going in and the initail switch on.Rb Tennents was ourcompany name and were taken over by Sheffield Forgemasters.We made steel rolls for rolling mills world wide.Anybody know of us?
Yes, Arc furnaces are incredibly loud.
@jmartis2 - Actually, I am correct. VA, while affected by reactivity is a separate measure. Regardless of how many inductors, capacitors, etc you put in a circuit or how you modify the phase, VA is VA. This is because DC has a stationary wave form so it's power factor is constant. 10vdc*10a=100W period. 10vac*10a*cosθ=70w. This is because AC voltage changes with the waveform.
:)
The noise there must had to be EXTREME.
+Tim Heise Yes, it is extremely noisy.
Do standard ear plugs even help?
I wouldn't think so--not even ear plugs and external ear protectors together. You would simply have to remain in a separate, sound-proofed room.
Yes your plugs can help but you also at the realized how extremely extraordinarily loud that is it would literally or hurt your ears painfully without any type the hearing protection at all I wore your plugs and ear muffs that were attached to my hard hat. I cannot express enough how loud that is in you feel the noise in To your Chest. Also the fabrication process of cold steel is forest sharing it from the rolling mill and in fabrication is extremely loud rolling a 100 pieces of rebar 300' long on a roll line at steel is very loud and we had a huge guillotine sheer they could cut about 60 bars at a time depending on the diameter. Great work and I loved it my message like hell I wish I could go back to it tomorrow.👷♂️😎👋😸
The ammeter is designed to handle that abuse,
It has been on that panel for many years and is for coarse indication.
Glycerine gets put in pressure gauges, never seen it in an ammeter
@fractureme correct, primary metering at 33kV level.
Oh the sound is music to my bones. I envy you for working in such a job despite its risks.
My late uncle, Jim Laroche worked at Head Wrightson in Middlesbrough on Tees. He took me to the steel works for the day and I saw the steel being poured and my uncle testing it. A small quantity was poured and if OK he gave the go ahead to proceed. I will never forget it. That would have been around 1958. J.
Hi, it is all computer controlled. not to sure what type of controller is used, I will try to find out. The current is sensed at the primaries of the 33 kV furnace transformer. The computer controlls the height of the electrodes.
Learning this stuff for a course on materials, never imagined it would be THAT epic.
That machine is the most awesome sounding/badass thing ever invented. hands down.
If you mean the furnaces...
Danieli in Italy, VAI Siemens/Fuchs in Germany, Tenova in Italy (part of the Argentinian group Techint). I'm sure there's more, but those are the names I know. There are other companies that make all the 'add-ons': "More" (mor-AY) burners and injectors, Flohe electrode arms, UCAR roofs, etc.
@DxcBones That's a pity. It is really no state secret to see how an arc furnace operates. 3 electrodes in scrap metal with a lot of noise and heat.
Thanks for your reply.
RODALCO2007 that's an ac arc furnace... also single dc furnaces with anode at bottom....
The busbar arms are water cooled, so are the flexible cables.
@DxcBones Great time to make a video of your arc furnace to add to the TH-cam database.
That must be loud! Very nice furnace :) I can only imagine how does their electric bill look like :o
I enjoyed that place a lot, now working in Penrose on a 250 MVA substation transformer upgrade.
That machine is off the 'badass machine' charts.
So frickin cool. This is an arc welder from hell. I wish I could see it in person! Totally Awesome!!!
That Mariah Carey's 'Always Be My Baby' is the soundtrack in the control room radio to this epic industrial violence is pretty much the coolest thing ever.
is this what hell looks/sounds like?
Wow, temperatures like the surface of the Sun right here on Earth. What a monster! Thanks for posting.
First time I heard this noise I was delivering a flatbed load of limestone to Nucor in Utah. At first I thought the mill was blowing up. Then I realized it was just the world coming to an end. scary...
HOLY CRAP!!!! Before I read the description, I thought this was a serious problem...but evidently, a dead short is how this think wors, huh? YIKES!!!
Well...
There's a lot of burnable equipment and services around it: cables for sensors, hoses for hydraulics, oxygen, gas and carbon powder...
What would cause the most damage is a water leak. The whole top half of the furnace is water-cooled. Water would turn the magnesite lining of the furnace to mush and the liquid metal would go straight through. Or, if a build-up on the inside of the furnace became waterlogged and then fell into the molten pool, the explosion would destroy the furnace.
That is the watercooled exhaust which feeds to a 20 meter tall multi level filter stack to remove all unwanted particles.
No, the transformer is designed to operate under those harsh conditions.
New Zealand, 50 Hertz network, you are correct.
Pacific steel or NZSteel
@@lesliecox1715 Somewhere in all these comments he said it's Pacific Steel.
@OnnomonnomonnO Primary voltage is 33 kV
The meters are reading the primary (input) voltage and current from the electricity supplier. The output voltage from the EAF transformer to the electrodes is much lower,up to 1500 volts ,but the current is much higher.42000 amps is quite usual in these furnaces.
Correct, the analogue ammeters read values at 33,000 Volts.
the ampred monitoring system is actually correcting the auxiliary side of the systems kV threshold, therefore creating a polar disconnect between the two opposing voltages as you can see.
this looks dangerous and i love it!
Perfect for a Fire Type like myself
I worked in the lab here in 1970-71...brings back memories...
Primary of transformer is 33kV at 400-800 Ampères.
Secondary to EAF 300 Volts 42,000 - 52,000 Ampères.
I've been to several steel melting industries, and that's hell on earth. Lots of noise and heat. But I don't know why, but I like it a lot :D
Awesome - storm in a big bucket!😃 In my city there's a steel plant that has an EAF - perhaps one day I'll be able to go on a trip and see it...
wow, that plant must have its own substation!!
@kaaitj They are multiple 1600mm² cables feeding each electrode. Look under my EAF busbar video which gives you an idea of the TX side buswork.
They are the carbon electrodes and maintain the 3000°Celcius arc to melt the scrap steel.
@karlsruheprotestful A comparison: a cruising 747 generates approximately 60MW of power - this is enough to melt 2-and-a-bit metric tonnes of steel a minute. A 747 at takeoff generates approximately 140MW of power - now you can melt steel at around 4.9 tonnes per minute. The largest arc furnace in the world, a DC continuous-charge model in Tokyo, uses 320MW of power - 2x 160MW transformers, one for each phase.
It's an awesome experience allright
@KnittingPasta I think a blast furnace which uses gas or induction furnace which uses eddy currents.
@fractureme notice the 33KV reading was for the "bus bar volts"
presumaly the main supply input for the furnace showing the usage.
Place the graphite electrode into the electrode holder *securely*. Make sure you are wearing ALL YOUR PPE for welding. Turn the power on and bore into the crucible...
Things to note: the carbon electrode will get very hot - white-hot - very quickly. If you can somehow drip water onto it at the top of the stick, it will make the stick last longer. Be aware of flying metal droplets.
@denelson83 - A voltamp (VA) is a measure of power, like a watt, but in an AC circuit. In AC the voltage is constantly changing between a postive and negative value which means the circuit is only at peak power for a fraction of total time where a DC circuit stays at the same voltage. So the difference just allows one to compensate for that fact.
I was reading the gauges, BB volts is in kV, and Furnace Xfmr is in A.
If I'm wrong I stand corrected.
@sayrith The arc amongst the carbon rods melts the steel due to the 10,000 C temperature of the arc being just above or even in contact with the steel.
Holy Shit that is a lot of amps. I could not imagine being shocked by that, probably vaporize you in an instant
I now want someone to volunteer being in the middle of that arc. God damn. Atleast put a haunch of meat in that.
@@dimitar4y The new death row ?
@@wolfcatsden PFft. Smoked meat for days. The factory won't be able to clean up the stench or the remains. It'd ruin the metal, too. But the question is, just how fast will it cook a chicken tendie?
@@dimitar4y th-cam.com/video/VTzKIs19eZE/w-d-xo.html
Actually cause of the moisture content in meat and a human, it would explode- violently.
So what is all the smoke coming off from and where does it go from there? What is the arc on the left at 1:02? Also, why is one type of phase used over another? e.g. Delta or Wye? Lastly, what is the peak current drawn? I've watched this video many times the last few years. I still can't believe someone actually is walking past it lower left at 0:21. This video keeps me, as a Electronic Engineer & CS grad and knife maker (also into metallurgy) very interested. Thank you VERY much for sharing this! God bless!
This would be a perfect hobby to have out in the garage!
Interesting. A low voltage arc furnace. Electrode voltage on many here in the US is 11kV with similar amperage as your example here. Good stuff!
I operate a 3 phase arc furnace at the factory where i work you run 3 times the power we run to melt our fused cast refractories. I usually run about 18000 amps at 240 volts over a delta wye on the high end load. love your vids though :D
That current is sure erratic. I wonder if the neighbours complain of flickering lights?
I know when I lived in a Steel town you could tell when someone started up their EAF because the lights in the whole city would flicker.
If 2 EAFs in the town where running at the same time, it was positively headache inducing.
@1krr Nope, you have both W and VA in an AC circuit and they are the same only for unity power factor. When the power factor is less than 1, the V * A is less than W in the circuit. This might be caused either by reactive power (capacitive, inductive) which results in a phase difference in V/I, and/or a distortion of their waveforms. For example when you connect a capacitor to an AC source, it draws amps, there are volts of it but the watts are zero.
@RasterGraph There's a big integrated steel mill near where I live and they are the same way, no cameras no outsiders no nothing. Eventhough it is still the same 1950's technology in the plant.
That's Powerful.
The one at SSM in Sterling, IL is super-impressive, and is powered by regular utility power, provided by our fine Nuclear Power Plants. Nothing says I shit my pants like watching this thing go from 0 to Continuous lightning strikes in .3 seconds.
Hell is paradise compared to this.
Insane power.
I share that feeling, it's like a magnet to me too.
wow thats some heavy shit....amazing and thought your transformer videos were good...this is another level here. fuckin great