Cominco

Indium prices vary by purity level according to the number of mines. For 99.97 or 99.99% pure indium Meta/Bu//etm magazine s free-market prices ranged from 160 to 190/kg in 1993. Prices have trended downward since 1988. This, coupled with the fact that consumption increased during this period, is evidence that supply is ahead of demand. The most notable production increases have occurred at Indium Corp. of America, Nippon Mining Co. Ltd., Cominco Ltd., and Metaleurop S.A. The largest increase was made by Indium Corp. A 30-t increase was announced in 1988 in 1993 Indium Corp. announced plans to increase production by another 30 t to be phased in with demand, bringing the company s actual and planned increases to 60 metric tons over the 1988 level. 

Electrolytic Eefming. Electrolytic refining (26,27), used by Cominco Ltd. (Trad, B.C., Canada) and Cerro de Pasco Corp. (La Oroya, Pern), as weU as by several refineries in Europe and Japan, removes impurities in one step as slimes. The impurities must then be separated and purified. Before the development of the Betterton-KroU process, electrolytic refining was the only practical method of reducing bismuth to the required concentrations. 

A pressure leaching system to handle copper sulfide called the Sherritt-Cominco (SC) copper process was developed by these two Canadian firms. Pilot-plant testing was completed in 1976 (29), but commercial appHcation of this technology has not been achieved. 

Thus, roasting is avoided. The process, especially amenable to high iron and copper concentrates, has been installed by Cominco, Ltd. (44) at Trad, B.C., Canada, and will be installed at the Kidd Creek Mines, Ltd., plant at Timmins, Ontario. 

Magmont Iron, Mo. Cominco American Incorporated lead—zinc ore, concentrated ... 

Cia. Quimica Universal de Industrias (Mexico) Cominco (Canada)... 

Colour-Cheni Ltd. India, 170, 204 Colours Coatings Division, 211 Columbia Chemicals Company, 243 Columbian Chemicals Company, 223 Cominco Ltd., 148... 

Cominco [Consolidated Mining Smelting Company] A process for absorbing sulfur dioxide from smelting operations. The sulfur dioxide is absorbed in an aqueous solution of ammonium sulfite regeneration is by acidification with sulfuric acid. The ammonium sulfate byproduct is sold. Operated at the Cominco smelter at Trail, Canada, and at other smelters and sulfuric acid plants in the United States. Licensed by the Olin Mathieson Corporation. The name has been applied also to a lead extraction process. 

Sherritt-Cominco A process for extracting copper from chalcopyrite, CuFeS2. The ore is reduced with hydrogen, the iron leached out with sulfuric acid, the residual Cu5FeS4 dissolved in concentrated sulfuric acid, and the copper isolated by electrowinning or hydrogen reduction. Pilot testing was complete in 1976. 

Cominco, Ltd., 26 562 Comite International des Poids et Mesures (CIPM), 24 434, 435, 436 Comite International Special de Perturbations Radioelectriques (CISPR), 76 512... 

Consolidated Mining and Smelting Company of Canada (Cominco, Ltd.), 26 562... 

Tech Cominco, Product Technology Centre, Mississauga, Ontario, Canada... 

The Pebble Cu-Au-Mo porphyry deposit contains one of the largest resources of Cu and Au in the world. The deposit consists of two zones Pebble West, discovered by Cominco America in 1989, and Pebble East, discovered in 2005 by Northern Dynasty Minerals Inc. (NDM), who began exploring the area in 2001. In 2007, NDM and Anglo American formed the Pebble Limited Partnership. The West and East zones contain a combined resource of 72 billion pounds of Cu, 94 million ounces of Au, and 4.8 billion pounds of Mo (NDM 2009). 

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