Should have been more specific, tunnel vision set in. I'm interested
in metallurgical slags, more specifically iron.
Sorry
James Brothers
On Apr 26, 2006, at 11:10, Trevor Dunkerley wrote:
> Roger,
>
> I think one has to be very careful on this one. Slags can come from
> many and varied sources:
>
> Geological material ('natural slags') (lava, pumice, obsidian)
> Domestic and destruction slags (destruction of buildings by fire,
> slagged structures and remains of household ovens and heating
> installations)
> Technological, non metallurgical slags (brick and tile
> manufacturing, lime kilns, pottery kilns, glass-making and glazed
> stone production)
> Metallurgical slags (non-ferrous metal smelting (copper, lead, tin)
> non-ferrous metal melting (purification of raw materials, alloying)
> bloomery hearths for wrought iron production and iron smithing)
>
> What complicates the matter is that many can look very similar. I
> recently handed a piece of copper tap slag to an archaeologist who
> considered himself to be an 'expert' on iron slags. He was quite
> unable to accept that it was copper slag until I showed him the
> analysis. Metallurgical slags are of course predominately iron
> silicates.
>
> I would recommend a copy of:
>
> Bachmann Hans-Gert, 1982, The Identification of Slags from
> Archaeological Sites, Institute of Archaeology Occasional Paper No. 6.
>
> This is a good starter.
>
> Kindest regards,
>
> Trevor
>
> ----- Original Message ----- From: "Roger Gelder"
> <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, April 26, 2006 3:49 PM
> Subject: Re: Slag
>
>
>> An even nicer alternative would be if anyone with access to a wide
>> range of archived slags could provide images, sections,
>> etc for we innocents wandering the fields (as I have been doing
>> for the past 6 months' worth of Sundays) showing some typical
>> slags from various sources. Putting such images onto a CD/DVD
>> would provide an invaluable service both for me, the collector,
>> and yourselves, seeking original sources 'in situ'. As a for instance
>> our 48 acre field walk(say 550m x 350m) has yielded a number of
>> 2-3m diameter slag 'patches' which we think may be from traction
>> engine fire boxes being cleaned, but there are odd fragments of a
>> different nature from the half-melted bubbly traction engine slag.
>> Pictures - general and detailed, sectioned and micro-photographed,
>> would provide guidance. I would expect there are many
>> archaeological groups who would be only too willing to buy such a
>> resource, if it were
>> ever available. I know - who has the time to do it? Always the
>> difficulty.
>> Roger Gelder
>> (Abingdon Area Archaeological and History Society)
>>
>> ----- Original Message ----- From: "James Brothers" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Wednesday, April 26, 2006 3:30 PM
>> Subject: Slag
>>
>>
>>> Any recommendations on good books/articles on slag analysis?
>>> Another list I'm on is asking. I know of some, but I'm hoping
>>> that there are some newer ones. Audience is archaeologists and
>>> historians, not archaemetallurgists, chemists and physicists. So
>>> they are probably more interested in basics rather than phase
>>> diagrams. Although a few advanced references for the brave of
>>> heart would be a good idea.
>>>
>>> thank
>>> James Brothers
>>
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