Steel Making Process with Hot Metal, Scrap and DRI
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- čas přidán 3. 10. 2019
- Electric arc furnaces are a refractory brick-lined U-shaped vertical vessel in which scrap steel, hot metal and sponge iron are melted by an electric arc. Electric Arc Furnaces (EAF) are used to produce carbon steels and alloy steels by using high-power electric arcs formed between a cathode and one (for DC) or three (for AC) anodes. An electric current is passed through the electrodes to form an arc. The heat generated by this arc melts the scrap.
Nowadays, Scrap is by far the most important resource, accounting for about 80% of all electric arc furnace metal feedstock.
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It's seldom you see hot iron from a blast furnace being charged into an electric furnace. Thanks for sharing!
amazing video, it's really shown the actual condition
That's just the wind blowing...LOL
Them cables swaying from the current running through them...😮
Is that from the magnetic fields generated?
Doxie Lain it could be. I just assumed it was from the thing as a whole moving downward, like the wires were coiling up and swaying as they did.
Those are some angry pixies!
That's more likely from the amount of current generated.
Yes it's correct, beside the effects of high current, there was an adjustable control from PLC for closed loop control, to adjust the gap between solid material and grounding, the working principle is same as the electrode welding. So the current keep changing rapidly, it's make the current flow also changing rapidly
這個是收集廢鐵，廢鋼，利用電弧爐去熔鍊成鋼水，再製成軋鋼用的鋼胚，或是澆鑄成鑄鋼件。
Real men burn stuff at work
Where does the hot molten metal charge come from? From excess in the casting CCM area?
From blast furnace
Gunung Garuda steel, cikarang, Bekasi, west java, Indonesia
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a magnet is not very effective for picking up sheet metal scrap. Why not use a claw?
some mills are better designed than others
Why is liquid steel charged to the arc furnace for the 2nd time?
Actually it's depends on the typical furnace, our furnace capacity is 130-140t, and the liquid steel ladle capacity is around 30-40t, but usually the actual liquid steel being poured is only 25t, because many reasons, such as drop temperature, to many slag in the ladle, etc
The liquid steel is called a "pour back". When the ladle spends too much time on the continious casting machine at a slow speed, the steel cools down below a certain point that is too dangerous to allow for safe continious casting, or too cool to not be flowing correctly through the ladle nozzle (nozzle gets clogged). Therefore ladles are sent back to the furnace to "pourback" the remaining steel to be re used.
This is often not a good sign, as it shows that there are operational issues in the caster (running with less casting strands for example), or because the steel was tapped at a relatively low temperature for its specified grade, or the ladle waiting time before it started casting took too long (crane issues, caster issues, treatment furnace issues, and so on)
Wow
Feel free to share this video to your friends, keep learning 👍
@@TFHC ya sure brother
Where is this steel mill america?
Indonesia 🇮🇩
I assume those electrode cables are swinging from induction?
Induction from the high voltage and current, but not from the movement or furnace
@@TFHC I thought it might be that, combined with the effect of high pressure cooling water within the same wrapping?
Yeah, but the most effect came from the high current induction during touching the ground
@@peteacher52 yeah but I did some observation during no load or no current, the HCC was not moved at all.
Whats with all of those orbs?
😁 it's sponge iron dust, limestone dust, etc
8:20
Tidak asing bagi saya EAF8-9 KS
What was that hum at the beginning before it started to go in
The hum? Do u mean the noises? We didn't measure it
Most likely the huge exhaust fan(s).
@skip7243 yes the exhaust fan is 6KV
Too much dead time
Bringing scrap from outdoors directly into the furnace...it must be a cold startup.
For startup it's correct, we used fuel burner during first heating, but for the continuous operation we still keep the rest steel around 2-3 tons on the furnace
@@TFHC I didn't quite understand the second part - you keep 2-3 tons of steel on the furnace? You mean near the furnace so it can warm and dry before charging?
Inside the furnace, after tapping the molten steel to the ladle, we still have rest steel inside the furnace
@@TFHC Ah OK
SSP
Nah ini salah satu mantan Nakhodanya...👍👍
Pak Matto is the best
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Bad mix redo?