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==Copper recovery from wastewater==
The biofuel cell made by [[Annemiek Ter Heijne]] can be used to retrieve copper from wastewater. This would increase yields, and more importantly, reduce the amount of cupper that comes into large rivers/lakes from the mine. See http://pubs.acs.org/doi/abs/10.1021/es100526g , http://www.wur.nl/uk/newsagenda/archive/news/2010/Biofuel_cell_retrieves_copper.htm

add to article
[[User:KVDP|KVDP]] ([[User talk:KVDP|talk]]) 13:30, 21 March 2011 (UTC)
http://pubs.acs.org/doi/abs/10.1021/es100526g

==Problems with the article==
I chanced across this article when looking for an explanation of "blister copper" in Wikipedia. It has some problems. For a start, the comment that it is about historical extraction techniques doesn't seem to accord with the content. 

Secondly, the heading "Blister copper extraction" is kind of meaningless. Blister copper is a step along the route to the production of copper metal that precedes fire refining. I changed the title to "Sulfide smelting".

Froth flotation is probably better separated from smelting, as it can be a precursor to leaching as well.

I don't have time at the moment, but I will get back to this page at some time in the future and fix the major issues.

By way of explanation, I worked in copper smelters for almost 20 years and have a modicum of understanding of the processes used.[[User:ChrisFountain|ChrisFountain]] ([[User talk:ChrisFountain|talk]]) 07:05, 25 June 2013 (UTC)

== Tepesi claims of 7,250 BC, and Serbian site in same section ("History") ==

Source gave only "4515" BC as a carbon-date, not 7250 BC as claimed in this article -- and NEITHER date is linked by the authors to the copper-production era of this site (they discuss findings in several eras, or "stages" within the same location); '''copper ITSELF cannot be carbon-dated, anyway (contrary to how a WP editor had (misre-)presented the claim of 7,250 BC, which was an unreferenced claim, as well), and so copper items need to be linked (by a credible scientific source) to contextual evidence, such as carbon life, within the SAME ARCHAEOLOGICAL LAYER as the copper items in question.''' 

Serbian site (Plocnik): The only source has a title which denotes uncertain (NOT "secure") dating: "Serbian site MAY HAVE hosted first...".  But then it contradicts itself by claiming "secure dating" a few lines down; source is a ''science journalist'' rather than an actual scientist (archaeologist), raising issues of WP:RS, etc, when combined with his self-contradiction, and '''getting a Primary Source (archaeologist) hopefully will help to clear up exactly how certain the ''actual scientific expert'' is, regarding his own dating.'''
[[Special:Contributions/72.183.52.92|72.183.52.92]] ([[User talk:72.183.52.92|talk]]) 02:56, 10 February 2016 (UTC)

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== Requested move 27 January 2017 ==
<div class="boilerplate" style="background-color: #efe; margin: 2em 0 0 0; padding: 0 10px 0 10px; border: 1px dotted #aaa;"><!-- Template:RM top -->
:''The following is a closed discussion of a [[WP:requested moves|requested move]]. <span style="color:red">'''Please do not modify it.'''</span> Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a [[Wikipedia:move review|move review]]. No further edits should be made to this section. ''

The result of the move request was: '''moved'''. <small>([[Wikipedia:Requested moves/Closing instructions#Non-admin closure|non-admin closure]])</small> [[User:SkyWarrior|<span style="font-family:Comic Sans MS;color:forestgreen">''Sky''</span>]][[User talk:SkyWarrior|<span style="font-family:Comic Sans MS;color:forestgreen">''Warrior''</span>]] 03:38, 11 February 2017 (UTC)
----

* [[:Copper extraction techniques]] → {{no redirect|Copper extraction}}
* [[:Cobalt extraction techniques]] → {{no redirect|Cobalt extraction}}
– The "techniques" at the end of the current name is unnecessary (see [[Gold extraction]]). [[User:Laurdecl|Laurdecl]] <sup>[[User_talk:Laurdecl|talk]]</sup> 05:58, 27 January 2017 (UTC) <small>--'''''Relisting.''''' [[User:JudgeRM|<span style="font-family:segoe print;color:goldenrod">'''JudgeRM'''</span>]] [[User talk:JudgeRM|<span style="font-family:Trebuchet MS;color:teal">'''(talk to me)'''</span>]] 03:26, 4 February 2017 (UTC)</small>
*'''Support''' seems uncontroversial [[User:BobLaRouche|BobLaRouche]] ([[User talk:BobLaRouche|talk]]) 17:08, 4 February 2017 (UTC)
*'''Support''' same reason. [[User:MartinezMD|MartinezMD]] ([[User talk:MartinezMD|talk]]) 19:21, 4 February 2017 (UTC)
----
:''The above discussion is preserved as an archive of a [[Wikipedia:Requested moves|requested move]].  <span style="color:red">'''Please do not modify it.'''</span> Subsequent comments should be made in a new section on this talk page or in a [[Wikipedia:Move review|move review]]. No further edits should be made to this section.''</div><!-- Template:RM bottom -->

==Wiki Education assignment: ERTH 4303 Resources of the Earth==
{{dashboard.wikiedu.org assignment | course = Wikipedia:Wiki_Ed/Carleton_University/ERTH_4303_Resources_of_the_Earth_(Winter) | assignments = [[User:User5843|User5843]] | reviewers = [[User:RockySurfaces|RockySurfaces]], [[User:Hylaversicolor|Hylaversicolor]] | start_date = 2023-01-13 | end_date = 2023-04-15 }}

<span class="wikied-assignment" style="font-size:85%;">— Assignment last updated by [[User:ChloejWard|ChloejWard]] ([[User talk:ChloejWard|talk]]) 03:40, 15 April 2023 (UTC)</span>

== Concentration (benefication) - Specialized Ores  ==

I have drafted a copy of a newly improved part of the specialized ores section for this article. This entailed changing some of the sentences in the section to match current research. I also added citations to the section since there currently are none. I will be moving the draft into the main article momentarily and it should be available to view within the hour. I would greatly appreciate any feedback that may further improve this section.  [[User:User5843|User5843]] ([[User talk:User5843|talk]]) 00:12, 11 March 2023 (UTC)

:I have also added another sentence describing new techniques tailored to processing low-grade ores.  [[User:User5843|User5843]] ([[User talk:User5843|talk]]) 02:11, 13 April 2023 (UTC)

== Scope of the article has changed to include modern techniques ==

It seems from the above comment that @[[User:User5843|User5843]] has added info about new techniques thus changing the scope of the article to broaden it from just historical techniques.

I think that was a good move therefore I am excerpting [[ISASMELT]] to this article. [[User:Chidgk1|Chidgk1]] ([[User talk:Chidgk1|talk]]) 07:36, 18 December 2023 (UTC)

== Splitting proposal ==
I not that the scope of the article is quite spruced and its different topics are poorly integrated. By this I refer mainly to copper mining and copper smelting. I therefore propose to split content about copper mining into an article called [[copper mining]] which is at the moment a redirect to here. [[User:Erosiva|Erosiva]] ([[User talk:Erosiva|talk]]) 15:09, 24 March 2025 (UTC)
* {{small|Retracted after reading more thoroughly. [[User:Gracen|Gracen]] ([[User talk:Gracen|they]]/[[Special:Contributions/Gracen|them]]) 18:34, 14 April 2025 (UTC)}} <s>'''Weak oppose''' at a first glance: based on your comments on the article (I've just woken up and will read the actual thing later today), it would make much more sense to clean up the article in its current state and better integrate the two topics rather than split it into multiple articles.</s> [[User:Gracen|Gracen]] ([[User talk:Gracen|they]]/[[Special:Contributions/Gracen|them]]) 11:19, 14 April 2025 (UTC)
*'''Support''' for split into [[Copper mining]] and [[Copper refining]]/[[Copper extraction]]. They are separate topics.  The former is more about where the mines are, how they operate, "peak copper" and things like that.  [[Copper refining]]/[[Copper extraction]] is a separate theme where some chemical knowledge would be needed. --[[User:Smokefoot|Smokefoot]] ([[User talk:Smokefoot|talk]]) 14:26, 14 April 2025 (UTC)

*'''Support.''' As said above, these are two different topics that could reasonably both be called "extraction", and require (at least) two different types of knowledge.
:Issue looks to be larger than just this page specifically, and might benefit from a more uniform approach to major industrial metals. For example, look at the difference in approach between the pages for [[copper ore]] (a table of minerals) and [[iron ore]] (much more similar to this page's mining sections). [[User:Fishsicles|Fishsicles]] ([[User talk:Fishsicles|talk]]) 16:22, 14 April 2025 (UTC)
::I have started a more general discussion of this at [[WT:CHEM#Uniform approach to extraction and refining of industrial metals]]. [[User:Fishsicles|Fishsicles]] ([[User talk:Fishsicles|talk]]) 19:04, 14 April 2025 (UTC)

*'''Support''' per above and my own (no longer sleep-addled) opinion. I also agree with [[User:Fishsicles|Fishsicles]] that this issue spans more than just this article. I was going to write a proposal for centralizing discussion, but Fishsicles beat me to it! [[User:Gracen|Gracen]] ([[User talk:Gracen|they]]/[[Special:Contributions/Gracen|them]]) 19:24, 14 April 2025 (UTC)