onsdag 18 juli 2012

Dundee´s smelter, bra artikel & svensk vinkling



ABB wins copper smelter contract
Contract will see ABB transfer skills to Namibians, as new state-of-the-art technology is introduced trained engineering staff will be required
Published:2012/07/18 06:56:40 AM

POWER and automation technology group ABB said yesterday that copper producer Namibia Custom Smelters had awarded it a five-year, full-service contract to manage and improve maintenance at a smelting and converting plant in northern Namibia.

Namibia Custom Smelters vice-president and MD Hans Nolte, said the contract would see ABB transfer skills to Namibians. "As new state-of-the-art technology is introduced, highly skilled engineering staff will be required to maintain the smelter in the future," Mr Nolte said.

The smelter was commissioned in 1963 in Tsumeb, about 425km north of Windhoek, to process concentrate from the Tsumeb copper mine.

The plant is one of only five commercial-scale smelters in Africa. It is linked by rail to the Atlantic port of Walvis Bay.

Namibia Custom Smelters is owned by Canadian mining company Dundee Precious Metals.

It consists of two primary smelting furnaces, three converters, and has an annual production capacity of 200000 tons of copper concentrate from the treatment of complex copper concentrates containing gold, silver and arsenic.

The smelter is one of only a few in the world that have the capacity to treat arsenic-bearing copper concentrates.

Blister copper and arsenic trioxide were produced from the concentrates and the copper was then delivered to refineries for final processing, while the arsenic trioxide was sold to third-party customers, ABB said.

Vad är då bakgrunden till att vi här har något så ovanligt som en guldproducent som även smälter sin egen metall?

I guld och kopparmalm så finns det ofta varierande grad av arsenik som bi-produkt (det har t.ex även Orvana i Spanien) och i en värld av enorma smältverk som jobbar mot allt lägre utsläpp så behövs det små specialicerade enheter som kan ta hand om just den malmen i en process som just handlar om att ha fullt fokus på säker hantering av arsenik på ett sätt som de stora "bulksmältverken" inte kan ha. Eftersom det fanns brist på effektiva sådana smältverk så bestämde sig Dundee för att köpa och modernisera ett av dessa nedgångna gamla smältverk och även om huvudorsaken var att kunna smälta sitt eget koncentrat så kommer har dom och kommer dom även kunna hantera arsenikhaltigt material från andra gruvor på ett miljömässigt överlägset sätt när moderniseringen är fullt genomförd.

Från bolagets hemsida ytterligare historik:
The smelter is one of only a few in the world which is able to treat arsenic and lead bearing copper concentrates and is therefore able to conclude long term favourable contracts to treat such concentrates. Both blister copper and arsenic trioxide (As2O3) are produced from the concentrates.


The blister copper is delivered to refineries for final processing and the As2O3 is sold to third party customers.

Tsumeb Smelter has become a major custom smelter with brown-fields expansion potential. It produces blister copper (98.5% Cu) and has the ability to treat complex copper concentrates.


On March 24, 2010, DPM completed the acquisition of NCS, a metals processing and smelting operation (the “Smelter”) from Weatherly Mining International by way of the purchase of 100% of the shares of NCS. As part of the agreement to purchase NCS, the Company has been provided with an indemnification with respect to certain matters, such as any environmental and license breaches or breaches of law that may exist up to the date of completion of the acquisition of NCS, being March 24, 2010.

Louis Dreyfus Commodities Metals Suisse SA has exclusive rights to purchase the Chelopech concentrate for toll processing through the Smelter and an exclusive arrangement to further supply concentrate feed for toll processing at the Smelter through to and including 2020. The arsenic trioxide (“As2O3“) produced is sold to third party customers.

History
The Tsumeb Smelter Complex was built between 1961-1962 and commissioned in 1963 by Tsumeb Corporation Limited (TCL) under mining giant Newmont Mining. It featured an integrated copper and lead section (with refinery), and smaller plants that produced cadmium and arsenic trioxide as by-products. Production officially started on March 3, 1964. At that stage, the Smelter produced more than 3,500 tons of copper and 6,000 tons of lead per month. By 1986 the Smelter was also producing sodium antimonite for export.

Namibia Custom Smelters Sustainable Development
Namibia Custom Smelters (NCS) is acutely aware of its position and history within the Tsumeb community, its role in the Namibian regional economy and its duties as responsible corporate citizens in Namibia and southern Africa in general. As part of DPM, NCS subscribes fully to its parent company’s corporate values & commitment to “… achieving and maintaining recognized best practice mining, processing, environmental and health and safety standards at all its operations and facilities.”

“The protection of employees, communities and the environment, from exploration and mining through to rehabilitation and closure” remains key to successful project development and operation at NCS and this important ethic is fully aligned with DPM’s corporate philosophy and overall sustainable development policy.
Since DPM’s purchase of NCS in March 2010, the installation of best practice environmental management and an enhanced, progressive social responsibility and investment credo has been an absolute priority. During 2011 and into 2012, a number of environmental and social improvements and projects will be initiated, consolidated and completed.

Environmental Responsibility
Notwithstanding pre-existing limitations, at this early stage in NCS’s renewed sustainable development evolution, there are a number of key aspects providing a specific and encouraging narrative of NCS’s commitment to maintaining a positive sustainable development trajectory.
  • The completion of infrastructure improvement projects, most of which have and will improve environmental performance as specific outcomes.
    • construction of an on-site hazardous waste disposal facility (one of only very few in Namibia);
    • installation of new, technically current baghouses to reduce airborne emissions;
    • development of fume extraction systems at copper tapping points; and
    • upgrade of product conveyor systems to minimize dust generation.
  • Initial discussions with WWF Namibia regarding corporate partnership models to support conservation projects in Namibia’s north (the Otjituuo & King Nehale conservancies are the closest to NCS);
  • The establishment of an NCS Environmental Department and the purchase of sophisticated air and water sampling equipment for measured metrics such as SO2, fall out dust, total suspended particulates, arsenic and lead;
  • The purchase of dust vacuuming and suppression vehicles for dedicated use on the NCS site to more effectively manage dust and its impact on the community;
  • The repair and rehabilitation of historical and current tailings facilities;
  • The rehabilitation and decontamination of historic facilities such as the tar pit site;
  • The assessment and development of a comprehensive site water management system which may include canal lining and dilution facilities; and
  • Detailed feasibility studies into the possibility of installing sulphur capturing facilities to reduce SO2 emissions and improve environmental performance.
Social Responsibility
  • The establishment of community trust to be funded by NCS aimed at providing financial support for educational, health, social welfare and environmental projects in the broader Tsumeb area. Potential projects of interest include HIV/AIDS community support training and education enhancement projects;

NCS donated furniture to Francis Galton primary school in Tsumeb.
NCS contributes to The Hope Centre in Tsumeb which feeds 155 street children twice daily and is home to 32 children.

NCS provided building materials in support of the new school hall and kitchen at Ondundu primary school in Tsumeb.
NCS is also donating laboratory equipment to the Opawa primary school in Tsumeb.
  • The establishment of a Public Relations Department to work closely with NCS’s Environmental Department to ensure enhanced and transparent communication with NCS stakeholders and the broader public.
Health and Safety
  • New and modified biological testing procedures and protocols to insure employee health and wellbeing and the installation of best practice medical surveillance software to track and comprehensively monitor employee health.
Kort sagt... ett modernt gruvföretag tog 2010 över en usel nedsmutsande verksamhet och de stora vinnarna är befolkningen i närområdet, anställda med familjer, vi som medverkar i att finansiera uppgraderingen och förhoppningsvis sen gör vinst och naturligtvis alla förbrukare av produkter från koppar och guld. Världen behöver utvecklas och förbättras inte överklagas och avvecklas.

1 kommentar:

  1. Bra köpsida som ställer upp sig i Aurcana idag

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