Talk:Electric arc furnace

EAFs are also used in Glass Furnaces

So tell us more! I didn't know this - and they must be different from steelmaking furnaces due to non-conductive charge material. Please add any references you can. --Wtshymanski 16:43, 21 January 2007 (UTC)

- I think such processes as Electro Slag Remelting,(ESR), Vacuum Arc Remelting (VAR), Plasma Arc Remelting(PAM) and Electron Beam process deserve a separate page. In contrast to classical large scale metallurgy, this processes focused on production of smaller quantities but higher quality steels and alloys for very demanding applications. For example all rotor-stock of Ni-based superalloy Inconel 718 is produced via triple melting VIM (Vacuum Induction Melting)-ESR-VAR. Ti based alloys are typically doublemelted via 2xVAR process, even steel 300m for landing gears of Airbus and Boeing is produced via VAR process. There is much more interesting material about these processes, and I feel pity that Wiki saved just a few lines for VAR in the article about electric furnaces.

Unfortunately I am a bit by Wiki's requirements for references. Apparently most of the references for such processes are either closed sources, or scientific papers, which available online if you pay money. Or equipment manufacturer's websites, which I am afraid to list. —Preceding unsigned comment added by Dima333a (talk • contribs) 20:46, August 30, 2007 (UTC)

By the way. It looks like there are two different pages for Vacuum Arc Remelting. If you type VAR, or Vacuum arc remelting (only first word is capitalized), it brings you to electric furnaces page. However, if you type Vacuum Arc Remelting (all words capitalized) it brings you to a stub: http://en.wikipedia.org/wiki/Vacuum_Arc_Remelting. —Preceding unsigned comment added by 66.64.189.202 (talk) 12:54, 7 September 2007 (UTC)

Need a picture

We need a schematic cross-section through an arc furnace; we had one -but apparently it wasn't free enough for the Wikipedia. --Wtshymanski 02:45, 1 October 2007 (UTC)

show pic 129.18.207.179 (talk) 11:23, 25 October 2023 (UTC)

Second this! I could draw detailed, labeled pictures, but they would take time that I currently don't have much of. If there are amateur technical drawers out there, could you please help by contributing free pictures to this article? Sentinel75 (talk) 23:53, 8 March 2008 (UTC)

Home electric furnace

"Electric furnace" redirects here. What is the difference between this and an electric furnace in a home (as opposed to propane, natural gas, etc.)? Since this redirects here, there needs to be something about it, or a note indicating to go elsewhere. I actually came here looking for information about electric furnaces because I don't know much about them and I am considering changing to one in my home due to the increasing propane prices. Squad51 (talk) 14:30, 9 January 2008 (UTC)

Electric furnace for space heating ought not to redirect here! I've fixed this. --Wtshymanski (talk) 17:36, 9 January 2008 (UTC)

Laboratory Arc Furnaces

Research use for arc furnaces is mentioned briefly in the introduction. Is there an existing article for these that I can't find, or should I write a section for them in this article? JaredAllred (talk) 16:55, 30 September 2008 (UTC)

I'd be thrilled to read about such things - try searching for "arc furnace" and see if any laboratory articles turn up - if not, write away! (After a quick look I find nothing.) I hope you've got a reference to cite, too - or maybe a pointer to a good Web page. --Wtshymanski (talk) 19:41, 30 September 2008 (UTC)

If I'm not mistaken, laboratory scale arc furnaces are usually deemed to have such ridiculously high heat losses, that any information about power consumption that one would derive from them would be worthless. Rather, in the laboratory, induction or resistance type furnaces are generally used to simulate an EAF heat. That said, pilot scale EAF furnaces do exist. Again, heat losses are an issue, but better correlations can be drawn from pilot scale units, particularly if a database exists for scale up to a commercial size unit in a particular application. The pilot units I know of are at Mintek (South Africa) and MEFOS (Sweden). I'm sure there are more out there, and plenty of articles published...BSMet94 (talk) 20:13, 11 February 2009 (UTC)

Strip quality from EAF

I took out the allegation about erratic quality of strip produced from EAF steel, there were no sources and it is at variance with my own epxerience. No-one would be building EAF strip plants if there was no demand for the steel - and modern techniques of, say, auto body panel manufacture demand much higher steel quality than that of a generation ago. After all, EAF steel starts out as steel...blast furnace steel starts out as...dirt? --Wtshymanski (talk) 17:42, 21 January 2009 (UTC)

Wtshymanski, I worked on a project for an EAF strip mill in the US last year. As part of the project, we had to be sure that we could control sulphur levels in the steel, and the EAF was very careful to control phosphorous and copper levels in the steel, by adjusting the percentage shredded scrap and (highly expensive) pig iron in the charge - the net effect was more pig iron. The copper levels clearly had an impact on the quality of the steel that could only be remedied by the addition of raw iron. An integrated plant has a surplus of copper-free iron and uses some scrap in the steelmaking charge to balance the heat and lower costs. If the EAF didn't have to worry about copper levels, like in commercial grades of steel, I'm pretty sure that they'd attempt to do away with pig iron. Sentinel75 (talk) 06:56, 8 February 2009 (UTC)

But is this inherent in the EAF process or just the issue of control of raw materials you'd have in any process? --Wtshymanski (talk) 03:06, 9 February 2009 (UTC)

Lancing

I see several uses of the term "Lancing" in the main text, and I don't see either an explanation or a link to an explanation of this process. Could someone please elaborate? —Preceding unsigned comment added by 203.158.63.90 (talk) 11:46, 11 January 2010 (UTC)

ref added--217.155.32.221 (talk) 07:56, 16 April 2016 (UTC)

This sentence makes no sense!

In the last paragraph of the Construction subheading, there is this non-sensical sentence. I am not sure what the author was trying to convey, but I think it should be changed. "Therefore, the 300-tonne, 300 MVA EAF mentioned above will require approximately 132 MWh of energy to melt the steel, and a "power-on time" (the time that steel is being melted with an arc) of approximately 37 minutes, allowing for the power factor. " — Preceding unsigned comment added by 216.185.252.80 (talk) 02:26, 20 February 2012 (UTC)

Quality article!

Just came here to find some background about a current news item concerning self-sufficiency in UK steel recycling. Came away very well informed — thanks to all.--217.155.32.221 (talk) 10:37, 23 March 2016 (UTC)

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