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Mine Exploration Forum

Author Explosive Results of Copper Precipitation
Alasdair Neill

Joined: 10/12/2008

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 09:49:00
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The following is an extract from the Reports of Inspectors of Mines 1878:
"The precipitation of copper from mineral water, which until recently has only been in operation above ground at certain mines, has during last year been introduced below ground in the Cronebane Mine, county Wicklow. It might, however, have proved a very serious affair, as but for the watchfulness of those acting in mamagement, who noticed the flame of the candles lengthening, the gas emitted might have occasioned a very destructive explosion"
What gas would be emitted by the Cu precipitation process?
Has anyone come across this elsewhere, particularly as the process can occur in old workings containing much old ironwork?.
IP: 46.60.252.79
Morlock

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Joined: 31/07/2008

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 13:33:52
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Not sure if it's relevant but a Google search under "gas from copper precipitation" mentions H2S in the process in differing contexts.

Stuey may offer some extra info.
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BertyBasset

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Joined: 13/12/2007
Location: Caernarfon, North Wales

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 13:57:24
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Flame lengthening would imply oxygen, but I can't see how it could be produced. IP: 194.28.139.160
stuey

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Joined: 15/08/2007

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 16:26:32
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In my estimation, it was either incidental and unrelated, or it was H2S (explosive/flammable as well as toxic). I can't think of anything which would liberate hydrogen or methane as a direct part of a precipitation (reduction). IP: 92.29.175.61
Tamarmole

Joined: 20/05/2009
Location: Tamar Valley

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 16:43:04
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My money is on hydrogen sulphide IP: 86.167.204.30
John Lawson

Joined: 09/12/2010
Location: Castle Douglas Dumfries & Galloway

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Explosive Results of Copper Precipitation
Posted: 22/03/2013 19:47:01
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Having been underground here and seen the sedimentation chambers , I would imagine that the water containing the Cu2+ ion will be highly acidic, and these guys over did the addition of scrap iron - hence generating Hydrogen.

I cannot see how Hydrogen sulphide would be generated by this technique at all.

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Roy Morton

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Joined: 09/10/2007
Location: Redruth Cornwall

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Explosive Results of Copper Precipitation
Posted: 23/03/2013 01:36:40
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You could understand it if they were using electricity to speed things up, but in a passive system........?

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Strangely Brown

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Explosive Results of Copper Precipitation
Posted: 23/03/2013 12:50:56
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It couldn't have been H2S, I'm sure it would have poisoned the observer long before it's proportions made a difference to a flame.

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Strangely Brown, was owaincbrown
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