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The use of blast furnaces in Europe has been pushed back at least to the 12th century by archeological finds, see Lapphyttan. — Preceding unsigned comment added by 150.227.15.253 ( talk) 12:53, 20 December 2012 (UTC)
The meaning and the geographic/chronological/process applicability of the section beginning "The phase transition..." are quite opaque. It badly needs re-written for clarity, or deleted. Blether ( talk) 02:29, 8 June 2020 (UTC)
We removed Arvin from the Ezzati's because the statement regarding "releasing the impurities into the atmosphere" since silicon dioxide has low volatility in normal atmospheres; that is, you cannot simply evaporate it. I'm not completely familiar with this process, but I believe the slag is removed by virtue of its lower density. —Preceding unsigned comment added by 128.111.193.92 ( talk) 20:45, 29 February 2008 (UTC)
Pig iron has become a desirable supplemental feed stock (...) since it is pure iron
Is it a kind of jargon? At the beginning it is stated that raw iron contains up to 3.5% carbon. Or, it merely should read "relatively pure"? saimhe 15:05, 18 June 2006 (UTC)
This page needs a great deal more refernces in general. There should be a reference for the statement
"The Chinese were making pig iron by the later Zhou Dynasty (1122 BC - 256 BC). In Europe, the process did not become common until the 14th century."
as the time period for Chinese technology is often wildly speculated/exaggerated. —Preceding unsigned comment added by 139.57.60.28 ( talk) 16:08, 6 April 2008 (UTC)
Sure that resin was used as fuel? Doesn't sound cheap and abundandant enough to me. -- Pjacobi ( talk) 12:30, 5 May 2008 (UTC)
A great deal of this article seems not to be about pig iron at all. The subject is much better covered in blast furnace. Could we have ideas about what ought to be in this article? Peterkingiron ( talk) 22:22, 15 August 2008 (UTC)
The picture shows two iron weights, but they have a specific shape, no doubt related to their function. Pig iron should refer to blocks of iron cast into a standard generic mould. The material of which these weights are made is no doubt identical to pig iron, but they are cast iron weights (probably counter-weights) specifically cast for the purpose, not pigs of iron. Peterkingiron ( talk) 15:17, 1 February 2009 (UTC)
Whatever is being done in the Chinese illustration, surely it is not properly described as "puddling". Peterkingiron ( talk) 17:04, 1 March 2009 (UTC)
I have removed the following as almost certainly wrong:
Pig iron workers were recorded to have been in parts of West Africa in some of the metalworking Bantu civilizations such as the Bunyoro Empire and the Nyoro people. Iron, Gender, and Power - By Eugenia W. Herbert and in East Africa. Africa from the Seventh to the Eleventh Century By Ivan Hrbek, M. El Fasi - Unesco International
This is almost certainly the result of a loose (i.e. inaccurate) use of terms. The author almost certainly meant "bar iron" or "blooms", neither of which are "pig iron". In searching to verify the nature of the source. I found an article in in Anglo-Saxon England 19, 9 similarly abusing the term. All these need better verification becfoer they can be included in the article, that is books articles recording the results of primary research. Peterkingiron ( talk) 11:13, 2 March 2009 (UTC)
The statement "The presence of a high sulphur content in pig iron makes it unsuitable for good quality castings." is ambiguous, at best. I removed it. It is such a broad statement it cannot be left in the article. Depending on the type of casting being made, sulfur may not be harmful. Depending on the type or grade of pig iron, the amount of sulfur may be minimal. Mfields1 ( talk) 19:57, 13 December 2009 (UTC)
I have just reverted the following:
In Europe, the process was used as early as the Etruscans, who used it to make many items such as chariots, helmets, urns. Source quoted: A History of the Roman People. 4th ed. Allen M. Ward, Fritz M. Heichelheim, & Cedric A Yeo. Prentice hall.
This has been added by a relatively new user. I have not seen the source cited, but the claim is not credible. It is possibly due to the authors of the book cited not knowing what pig iron is. This is a common mistake among non-specialists, who have failed to understand the technology involved, and are using "pig iron" as if it were a synonym for iron made in bloomeries. Before such a claim can be accepted into the article, a citation from an acedemic publication on the history and archaeology of metallurgy would be required; not a citation from social history book. Unfortunately, even academic authros are prone to errors when not writing about their own subject. Peterkingiron ( talk) 14:43, 31 January 2010 (UTC)
The History section needs significant improvement. First of all, it is very brief. More importantly, it is very misleading. The smelting of iron to produce pig iron was quite developed in the Roman Empire. This is documented by Roman historians and verified by archaeology. Just because many technologies were forgotten during the Middle Ages doesn't mean that Europe didn't have the technology "until the late medieval ages." The Greeks also had pig iron technology before the Romans. Furthermore, there is no evidence that the Chinese invented iron smelting. Archaeological findings suggest that the Hittites, the Egyptians, and the Indians all had iron-smelting technology before the Chinese. The Wiki Iron Age article gives a brief overview of some important findings. I suggest that the History section be rewritten and that different sources be used. -- ElZarco ( talk) 19:02, 20 April 2011 (UTC)
This should be linked to Italian "ghisa". — Preceding unsigned comment added by 121.98.105.51 ( talk) 03:11, 27 October 2014 (UTC)
I'd added a fact tag to this last month, after failing to confirm it to a reliable source. Peterrivington has been making a brave attempt to supply one, but nothing reliable so far. Please note that this anecdote has been in the article since it was created by an IP back in 2002. [1] As such, it will almost certainly predate any websites that make the same statement, indicating that they will have drawn on WP for their sourcing. In some cases, this is really clear, as with the on-the-surface reliable IIMA, which on inspection is clearly sourced from WP (the language is nearly identical and they kindly reference WP at the end of their article).
Anyway, good luck to anyone looking for a source for this. I'd suggest that it probably needs to be in a serious book (i.e. not something like this. Likewise, it really should pre-date the WP article, so this 2009 book fails. I note though that that is the fifth edition; if the claim is made in an earlier edition that predates 2002, that might work. Bromley86 ( talk) 23:32, 12 October 2015 (UTC)
And here it is. Reference added. Bromley86 ( talk) 23:41, 12 October 2015 (UTC)
Yours obediently
I have substantially altered the "history" section, because people have been adding material that is plain wrong. To the best of my knowledge (and I do know) there is no evidence for cast iron in the ancient West. I have removed the offending text and replaced it with something credible. I have not seen the work Bronze to iron which was in the citation I have removed, but it is either wrong or (more likely) misinterpreted by a WP editor, who did not know the difference between bloomer iron and pig iron. I used to watch iron articles in WP carefully, but in recent years I have not had the time and there has been much less vandalism and original research than their used to be. I hope I have not removed the results of constructive edits by others; if I have, I must apologise, but the article as I found it was just plain wrong. Specifically, in my edits, I have used pp.149-150 of Importance of Ironmaking (of which I have a copy). Peterkingiron ( talk) 17:38, 15 October 2017 (UTC)
Is there someone with some understanding of this subject or familiarity with this article who can take a look at the first couple sentences? The second sentence about "crude iron" isn't a sentence at all, and seems out of place. I don't know enough about iron to fix it. Cloud atlas ( talk) 05:51, 29 March 2018 (UTC)
Last sentence in the "History" section: "The phase transition of the iron into liquid in the furnace was an avoided phenomenon"
I think this term "avoided phenomenon" is incomprehensible to the average reader (such as me). Please would someone add an explanation or appropriate link ?
Darkman101 ( talk) 21:02, 4 April 2020 (UTC)