Dave,
Dan is still at Sieritta. Serrita and Bagdad get their sulfuric acid from
Miami, where concentrate is still bing smelted. Danny thinks there might
be a new metallurgical process out there to extract the sufides without smelting,
but sources for the acid for leaching are beginning to be a problem.
Anne
>-- Original Message --
>Date: Tue, 28 Jan 2003 15:42:04 -0700
>Reply-To: "The mining-history list." <[log in to unmask]>
>From: David Killick <[log in to unmask]>
>Subject: Re: Sulphuric acid from sulphides
>To: [log in to unmask]
>
>
>Hi Anne,
>
>Good to hear from you, and yes, I would be interested in an answer!
>
>I had heard that Cananea was shut down with labor troubles. I trust that
>Dan
>is still employed? I saw the news about the layoffs at Sierrita.
>
>What are you up to at present?
>
>With best wishes
>Dave
>
>> -----Original Message-----
>> From: mining-history [mailto:[log in to unmask]]On Behalf Of
>> [log in to unmask]
>> Sent: Tuesday, January 28, 2003 3:07 PM
>> To: [log in to unmask]
>> Subject: Re: Sulphuric acid from sulphides
>>
>>
>> David,
>> How are you? I saw your question and may be able to get an answer if
you
>> are interested. The Cananea mine is closed over labor-management squabbles
>> that go back to privatization. The workers are also not seeing
>> the connection
>> between Grupo Mexico's financial problems and the mine's failure to keep
>> machinery repaired.
>> Anne
>> >-- Original Message --
>> >Date: Tue, 28 Jan 2003 15:02:05 -0700
>> >Reply-To: "The mining-history list." <[log in to unmask]>
>> >From: David Killick <[log in to unmask]>
>> >Subject: Re: Sulphuric acid from sulphides
>> >To: [log in to unmask]
>> >
>> >
>> >One of the largest single producers of sulphuric acid from sulphide ores
>> >is
>> >the Palabora Mining Company in South Africa. The sulphide ores
>> are contained
>> >in a vertical carbonatite complex, which was mined as an open
>> pit from 1965
>> >until 2000, when it attained a depth of 800m and was converted into an
>> >underground operation. The sulphur oxides captured from the smelter fumes
>> >supply, I believe, a bit more than half of South Africa's
>> industrial needs
>> >for sulphuric acid.
>> >
>> >While on this question, there is an interesting transition going on in
>> >Arizona's copper mining industry, in that smelting has largely
>> been replaced
>> >by heap leaching and electrowinning (largely for reasons of air quality).
>> >Heap leaching requires huge amounts of acid, and I have been
>> wondering where
>> >it comes from now that sulphide smelting is very much out of fashion.
>> >
>> >David Killick
>> >Associate Professor
>> >Department of Anthropology
>> >University of Arizona
>> >Tucson, AZ 85705-0030
>> >
>> >office (520)621-8685
>> >lab (520)621-7986
>> >fax (520)621-2088
>> >[log in to unmask]
>>
>> Anne Browning-Aiken, Senior Researcher and Program Manager, Environmental
>> Policy and Community Collaboration
>> Udall Center for Studies in Public Policy
>> SAHRA
>> University of Arizona
>> 520 884-4393
>>
Anne Browning-Aiken, Senior Researcher and Program Manager, Environmental
Policy and Community Collaboration
Udall Center for Studies in Public Policy
SAHRA
University of Arizona
520 884-4393
|