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December 19, 2012

Outotec to provide gas cleaning, sulfuric acid and effluent-treatment technologies for Namibia Custom Smelters

Gerald Ondrey

Outotec Oyj (Espoo, Finland; and Namibia Custom Smelters have agreed on the design and delivery of a gas cleaning system, sulfuric acid plant and related technologies downstream of the existing copper smelter in Tsumeb, North Province of Namibia. The total value of the contracts to be booked in Outotec's 2012 order intake is approximately €130 million. In addition, Outotec is negotiating the associated construction package, which potentially will increase the order value.

Namibia Custom Smelters, a subsidiary of a Canadian-based international mining company Dundee Precious Metals, operates an Ausmelt copper smelter on toll treatment basis in Tsumeb. Toll treatment is a service provided by custom smelters for mining companies who do not have their own downstream smelter operations to recover metal from the ore. The smelter receives a payment for the treatment.

Outotec's scope of delivery includes the basic and detail engineering, procurement and supply of a gas cleaning system and sulfuric acid plant, an effluent treatment plant as well as a sulfuric acid tank farm with rail and truck loading station based on proprietary Outotec technologies. The acid plant is expected to produce annually 230,000–320,000 metric tons of sulfuric acid. Outotec's delivery also includes two Peirce Smith converters, equipped with high efficiency converter hoods for maximizing the sulfur dioxide and impurities capture at the converters. The project is scheduled for completion in the third quarter of 2014.

The new gas cleaning system and sulfuric acid plant will process the off-gases from the copper smelter and the converters, reducing the emissions of the smelter and considerably improving the working and living conditions around the smelter.


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