Talk:Open-hearth furnace

message: The Seimens furnace is also known as an open hearth furnace in Australia. Not quite sure where the material on the Catalan forge belongs, but probably under open hearth furnace as well, it seems to be a predecessor of the Seimens process. Andrewa 18:45, 7 October 2005 (UTC)
thread_title: Untitled

message: Wouldn't it be a good idea to put some descriptive information about these furnaces? How big were they? The article explains the capacity, but not the actual physical size of them. The article is a good start but it is really lacking in the area of explaining what they look like and their size. Cambios 15:37, 12 January 2006 (UTC)
thread_title:  Needs More Descriptive Information 

message: I merged in the content from Siemens regenerative furnace. I made a few minor changes, and linked regenerative preheating to air preheater. Comments and changes are welcome. Tom harrison 13:58, 28 October 2005 (UTC)
replies: text: The Siemens regenerative furnace was the greatest invention of the man who first fashioned it.  It greatly enhanced the productivity of glassmakers as well as steelmakers.  It probably should not be in the same article with older furnaces.  Ancient Chinese, Egyptians, and others operated furnaces which created temperatures high enough to allow the production of iron and steel. Putting the Siemens regenerative furnace into the same article with older furnaces is comparable to including the Indianapolis 500 in the same article with chariot racing.  Superslum 06:45, 13 December 2005 (UTC)
replies: text: Around Sheffield we always refer to Siemens Open Hearth Furnaces (used for making steel). The last ones were removed about 35 years ago. I don't think the air preheater article correctly describes the design and operation of the regenerators (honeycombs made of brick) used in the UK (I assume all others were similar). Probably better to describe it here. AHEMSLTD 13:27, 20 December 2005 (UTC)
thread_title:  Merged 

message: I have removed the references to 'Catalan forges', as these have nothing to do with the subject.  This principally involves the deletion of the following:
:The development of the Catalan forge during the Middle Ages was a major advance in the science of metallurgy.
I have also added some more detaila and references.  Peterkingiron 22:52, 27 April 2006 (UTC)
thread_title:  Catalan Forge 

message: What the heck is an oxygen ray - a jet of oxygen, maybe? Route: the diagram is probably from Dutch, Dutch has many German elements, ray / beam / jet in German is "Strahl", so our amateur linguist thinks "ray" is the right word from the (probably) three possibilities in his or her dictionary. Tilt!Maelli (talk) 16:02, 23 June 2010 (UTC)
replies: text: Yeah, it should say Tuyere. Wizard191 (talk) 16:15, 23 June 2010 (UTC)

text: Yeah, the image is quite poor, however I don't think it will last long because it's up for deletion right now for a copyright violation. Wizard191 (talk) 16:34, 23 June 2010 (UTC)
thread_title:  Oxygen ray? 

message: What does that mean? What is the "hearth", why is it better open? I there a closed hearth furnace? I have trouble following the process, but mostly how it relates to the name..45Colt 22:34, 5 March 2015 (UTC)
thread_title:  Why "open hearth"? 

message: "Because steel is difficult to manufacture owing to its high melting point, normal fuels and furnaces were insufficient for mass production of steel, and the open-hearth type of furnace was one of several technologies developed in the nineteenth century to overcome this difficulty."
Steel has lower melting point that wrought iron.
Cast iron: 2200 F (1204 C)
Steel: 2500 F (1371 C)
Wrought iron: 2700 F (1482 C)
Iron:2800 F (1538 C)
(not sure if this is a valid source, but its the first that I googled that didn't have just steel and cast iron.)
https://www.industrialmetalsupply.com/blog/melting-point-of-metals
I was just casually looking into this (so I'm not fully sure about this), but steel isn't difficult to manufacture because of its high melting temperature. The difficulty comes from controlling the amount of carbon in it. If you liquify it (using blast furnace), it absorbs too much carbon and becomes cast iron. 185.246.148.68 (talk) 03:53, 29 May 2024 (UTC)
thread_title:  This sentence is misleading