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== OSHA vs NIOSH levels ==
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Agree. I came here looking for info on coke combustion temps when used as domestic heating fuel. Apparently one needs stoves that tolerate a higher temp than wood burning because coke can melt the iron stove itself (source: norwegian wikipedia article on coke). Looking for info on domestic coke-burning ovens/stoves.
[[Special:Contributions/31.45.110.132|31.45.110.132]] ([[User talk:31.45.110.132|talk]]) 07:59, 5 July 2013 (UTC)
:Agree there should be more on the brief (at least in the UK) domestic importance of coke. My parent's first house, a new bungalow built about 1937, was heated by the usual open coal fires but the hot water was supplied by a coke-fired boiler. The coal bunker was a brick-built part of the house but low external bunkers, with hinged lids, held the coke. When I was very small (mid-1940s) our garden path was formed from burnt coke, later replaced by concrete.[[User:TSRL|TSRL]] ([[User talk:TSRL|talk]]) 22:30, 21 July 2021 (UTC)
== History ==
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:: When you say "It is produced as part of gas manufacture", is that mentioned anywhere in the existing article? It's a feedstock for producer gas production, but that ''consumes'' coke rather than producing it.
:: [[Special:Contributions/23.83.37.241|23.83.37.241]] ([[User talk:23.83.37.241|talk]]) 17:32, 26 April 2018 (UTC)
:: {{ping|Andy Dingley}} As this conversation has stalled, I went and re-did the edit to give things a nudge. (I think we can both agree the wording change is minor enough that [[WP:DDWIP]] doesn't apply.) [[Special:Contributions/23.83.37.241|23.83.37.241]] ([[User talk:23.83.37.241|talk]]) 06:23, 3 May 2018 (UTC)
== Coke in heat shield ... not true ==
"Discovered by accident to have superior heat shielding properties ..."
I don't believe that the part about coal coke being used in Apollo ablator material is true. At the very least it's unsupported. I've checked the references and none mention using coal coke in the ablative material. The most detailed description of NASA TN D-7564, which says, "The ablative material selected for the TPS is designated Avco 5026-39G and consists of an epoxy-novalac resin reinforced with quartz fibers and phenolic microballoons. "
I therefore conclude that the assertion contained in the article is incorrect, and I am removing this false fact. If someone has evidence the the contrary please provide it and reverse my deletion.
[[User:Pgramsey|Pgramsey]] ([[User talk:Pgramsey|talk]]) 13:30, 18 September 2018 (UTC)
* We ought to have a whole article or two on heatshields.
: "Coke" is the core of most ablative heatshields since the 1950s. Although it's not the same thing as that coked from coal. It was developed by the British (see the [[Black Knight (rocket)|Black Knight]] program) as a lighter weight heatshield for ICBM RVs, based on phenolic resins around carbon fibres. When heated, this forms a coke layer which has low thermal conductivity, is highly refractory and acts as an ablative heatshield. Many versions of this have been produced since, [[Avcoat]] here being one of them, but using glass fibres and a cheaper manufaturing process that's more easily applied to large areas. [[User:Andy Dingley|Andy Dingley]] ([[User talk:Andy Dingley|talk]]) 14:13, 18 September 2018 (UTC)
Right. I've heard of "coke" on the ablator, but it's not coke made from coal being added to the ablative material, it's a consequence of the ablative material being burned. So I stick to my original assertion: coke from coal is not a component of Avco 5026-39G, so the paragraph should be removed since it is not true.
I'm not an ablator guy, I work the other end of the temperature spectrum. But I'm pretty sure I'm right on this one.
[[User:Pgramsey|Pgramsey]] ([[User talk:Pgramsey|talk]]) 02:56, 19 September 2018 (UTC)
::: But it's still coke. This is a term in materials science, with a recognised meaning, and the material here falls under it. [[User:Andy Dingley|Andy Dingley]] ([[User talk:Andy Dingley|talk]]) 10:12, 19 September 2018 (UTC)
== "Uses" Section has an incorrect chemical reaction ==
The "Uses" section supplies the chemical reaction for the reduction of iron oxide by carbon monoxide in a blast furnace as:
<chem id="2Fe2O3 + 3C ">2Fe2O3 + 3C -> 4Fe + 3CO2 </chem>
While this equation is correctly balanced and is the correct chemical reaction for the reduction of iron oxide via charcoal in a bloom oven it is not the right reaction for the reduction of iron oxide in a blast furnace, which relies on carbon monoxide for reduction not carbon proper.
The correct reaction should be:
<chem id="Fe2O3 + 3CO ">Fe2O3 + 3CO -> 2Fe + 3CO2 </chem>
[[Special:Contributions/199.94.1.205|199.94.1.205]] ([[User talk:199.94.1.205|talk]]) 18:57, 27 September 2019 (UTC)
: Agreed, although I'd prefer to see it as a two stage reaction and shown in full. Carbon and oxygen are supplied to the blast furnace as inputs, only a little carbon monoxide is recirculated. Most (almost all) of it comes from combustion and that takes place within the blast furnace, even if it's a separate reaction. The reader's understanding would be better if we clarified that two reactions are taking place (and it would be useful to show the energy released from the burning of the coke too). [[User:Andy Dingley|Andy Dingley]] ([[User talk:Andy Dingley|talk]]) 19:18, 27 September 2019 (UTC)
== Conversion of units in rough estimates ==
In the History of British coke production, the paragraph that begins "In 1802, a battery of beehives..." a series of output estimates is stated in long tons, then parenthetically converted to the nearly equal figures in short tons and tons/tonnes. I think that those conversions should all be deleted. The figures are nearly equal to each other, are not necessary and impede the flow of the text. An historical figure of 7 million tons is quite rough, I expect accurate to no more than two significant figures. To give parenthetically the equivalent in short tons introduces false precision, like saying a shark may range 50 km from its customary feeding ground, then adding parenthetically the distance 31.07 miles. In a different part of the History section, American coke output is expressed in tens of thousands of tons, with no unit conversion. I think that's the way the article should read. Does anyone agree?[[User:Cieljaune|Cieljaune]] ([[User talk:Cieljaune|talk]]) 15:43, 19 April 2020 (UTC)
:Agree.[[User:TSRL|TSRL]] ([[User talk:TSRL|talk]]) 22:03, 21 July 2021 (UTC)
:Agree. Done. --[[User:MadeOfAtoms|MadeOfAtoms]] ([[User talk:MadeOfAtoms|talk]]) 08:49, 22 July 2021 (UTC)
== Citations not providing proper context. ==
In the first paragraph of the history section under the Britain label, this claim: "In 1589, a patent was granted to Thomas Proctor and William Peterson for making iron and [[steel]] and melting lead with "earth-coal, sea-coal, turf, and peat". The patent contains a distinct allusion to the preparation of coal by "cooking". In 1590, a patent was granted to the [[Dean of York]] to "purify pit-coal and free it from its offensive smell"." is associated with this citation: https://web.archive.org/web/20130523122125/http://fayette.psu.edu/Information/Community/31281.htm
This information is strictly about the origins of coal in the coke region of PA in the US. Nowhere is England mentioned. A book is referenced on the page linked, but the book is not cited, the web page is. This sentence has very specific claims about the original patents which may lead insight into the origins of coke in the England/Europe/the US, but they are not cited here. I am going to attempt to find the proper patents and cite them as such, but I wanted to bring attention to this issue.
Thank you :) [[User:Iamyoursheppard|Iamyoursheppard]] ([[User talk:Iamyoursheppard|talk]]) 20:49, 1 December 2022 (UTC)
== Basic technology ==
Define the following terms. Coke. Mould.casting. Smelting <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/105.112.177.50|105.112.177.50]] ([[User talk:105.112.177.50#top|talk]]) 19:21, 3 December 2022 (UTC)</small> <!--Autosigned by SineBot-->
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