1992-05-04_REVISION - M1988112 (3)

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I-L1,02 sysum. It is the first plant using an elemental sulfur burner to produce S02. The capital cost of the sulfur burner should be recovered in six months as a result of reduced operating costs over the use of liquid SO2. Prices vary depending on location, but in Canada, liquid SO, can be obtained at 5.5 to 11 cents per ]b SOZ; S02 fivm elemental sulfur at 3 cents per lb and metabisuLSu at 50 cents per Ib SO=. These costs are highly competitive with the costs of hydrogen peroxide, chlorine, sodium or calcium hypochloriu or chlorine dioxide. LICENSING FEES AND INCO SERVICES The Inco SO~/Air process is proprietary technology and does require a license prior to use. The licensing fees are structured such that they do not offset the cost benefits of the Inco SOa/Air process relative to other oxidation processes. Licensing fees are negotiated based on the lower of reagent consumption or a small fraction of the gold and silver extracted by cyanidation. A single payment option is available. Inco's scientists and engineers can provide a range of expertise from any single aspect of the project to compleu project management. Services include Laboratory testing, plant scale tests, flowsheet evaluation, capital and operating cost projection, equipment specifications, detailed engineering, siu inspection, commissioning, training of plant personnel, preparation of an operating manual and troubleshooting assistance. Any of these services can be negotiated within the framework of the license. References 1. G.J. Borberly, E.A. Devuyst, V.A. Ettel, M.A. Mosoiu and S.J. Konstandn. "Cyanide Remova! fiom Aqueous Streams" Can Paunt 1,165,474 (April 10, 1984). Covered by U.S. Patent 4,537,686 (August 27, 1985) and Australian Paunt 543,569 (December 6, 1985). 7