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<br />Inco Exploration end Technical Services Inc. (IETS) is <br />a team of technical experts in metallurgy and mine <br />engineering. operations and process engineering... <br />bringing you costtffective technology researched and <br />developed by loco Limited. a world leader in the loca- <br />tion. development, mining, processing and marketing <br />of nickel, copper and other metals. <br />Tst^ Iweo.SOs/Atw Cra~istoti <br /><f' t•~ ::c <br />~itiTItYOT10M~ PROCiii'~s'_~~ <br />...A revolutionary approach to the safe, efficient and <br />economical removal oC cyanide and metal cyanide <br />complexes from industrial waste waters and slurries. <br />...Designed specifically for metallurgical processes <br />involving the use of cyanide, like gold eyeaidation, <br />metal plating and flotation. <br />...Reduces total cyanide to levels consistent with cus- <br />tomers' needs. In some cases this could be less rhea <br />1 milligram per litre. <br />...Draws on ibe skills end experience of Inco <br />researchers in the development and application of <br />imovative technological processes around the world. <br />...Marketed by Inco Exploration and Technical <br />Services Inc., a subsidiary of Inco Limited. <br />• Acbieves low total cyanide, including iron cyanides. <br />• Removes all base metals (including nickel and cap- <br />per to very low concentrations), without producing <br />toxic intermediaries. <br />• Uses safe reagents. <br />• Refpllrcb low Caplta] Costa. <br />• Targets more harmful cyanide first, resulting is <br />lower reagent and operating costa. <br />Developed and patented by Inco Limited for either <br />batch or coatiauoua cymide removal from industrial <br />waste streams (clear solutions or slurries.) <br />At Colosseum California's mill the Inco SOZ/Air <br />Process treats 3,500 tons of 45 per cent solids slurry <br />per day. <br /> <br />Tsse Pnocsii <br />Oxidizes both (ree and complexrd cyanide to evenate <br />IC:NO-) at pH ~-]0 at ambient temperature. <br />• The oxidizing agent: a combituttion oC S0: plus oxy- <br />gen in the presence of a small amount of soluble <br />copper catalyst; <br />• Supplies: Air for 0:. , <br />Gaseous or Gtptid SOZ, or soluble sulfites <br />or metebisulfites, or elemental sulphur, <br />for SOZ. , <br />CuSO4 as the copper eatalyet. • <br />• :Reagent contact with the solution or slurry to be <br />treated: in simple, open mixing tanks. <br />• Retention times: variable, depending on the compo- <br />sition of the solution to be treated, but generally <br />ranging from 5 to 60 minutes. <br />A reliable, straightforward, easy-to~ontrol operatioa <br />that removes: <br />• Cyanide bound to iron as a ferroeyeaide insoluble <br />salt, stable under a wide range of oxidizing and pH <br />conditions. <br />• Metals in solution, other rhea iroa, as hydroxides. <br />r~seis, Tw[aTY~M Rift/LTf <br />Cyanide (total) mgfl <br />Gold sad Silver milling Initial After treatinent. <br />Barren solution 420 0.1] <br />Leach tails slurry 240 0.30 <br />Plating wastes <br />Copper rinsewater 405 0.03 <br />Zinc rinsewater 147 0.12 <br />Cyanide rittse 1460 0.50 <br />