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Page 19 of 39 <br /> EYTEE <br /> PRODUCT <br /> XR Series Collectors <br /> Introduction Features AFRO3473 AE1103139 AEROA1X5160 <br /> Target l'lmeralsi <br /> Cytec XR Series Collectors are unique flotation e)re Types <br /> reagents that can be used as partial or full xanthate Coppersulid.:s <br /> replacements.Xanthate collectors were introduced in Precious metals <br /> 1925 and have been used for easy-to-treat ores,where (Au'Ag'Pcsra) <br /> ...........- .----...........--------------- <br /> selectivity(especially against iron sulfides and penalty Copper from copper <br /> elements)is not an issue.They are usually supplied in lead'zinc complex ores <br /> powder or pellet forms since solutions have relatively Zinc from lead/anc <br /> poor long-term stability.In addition to the stability complex ores <br /> issues,there are safety,health,and environmental issues <br /> Typical Operating <br /> related to the usage of xanthates;they are combustible. Conditians <br /> self-ignite/explode,and release toxic gases such as _-------� -- "------- <br /> Alkaline circuits <br /> CS„COS,etc.during storage,shipment and usage. (low,moderate,high) <br /> Hence,Cytec has developed the XR Series of xanthate P-Pertiev <br /> replacement products that exhibit a metallurgical -L'giud <br /> profile very similar to that of the xanthates without <br /> age <br /> the Safe Health and Environmental SHE concerns <br /> �' (SHE) (5-5ot)g;/tons) <br /> associated with xanthates. <br /> Undiluted <br /> XR Series <br /> Case Studies: <br /> The safety,health and environment problems,as <br /> mentioned above,prompted Cytec to develop more HERO 3473:A sulfide gold mine was looking to <br /> sustainable options to xanthates while keeping or improve their recoveries of gold while also lowering <br /> enhancing the metallurgical benefits.The novel solutions their overall reagent usage. <br /> are liquid products that can be dosed directly to the <br /> process, substantially Improving: Original Reagent Suite AERO 3473 Reagent.Suite. <br /> t Handling and level of exposure of the personnel to (;opuWr Consumption.ti7 g'tuns Collector Consumption:35 g+'tons <br /> product Frother Consumption 44 Winn Frother Consumption:25 ghons <br /> t Stock safety management %Au Recovery:45% %AuRecovery: 8M <br /> t Simplifying the plant operation <br /> Recovery increased by 2%while reagent usage was <br /> Xanthate replacements are typically custom-formulated decreased! <br /> products developed through Cytec's FM-100"m approach. <br /> There are several currently available formulations that <br /> can be used such as A ERO,�3473,AEM 3739,and <br /> AERO4 MX-5160 promoters. <br /> www.cytec.com <br /> Page 1 of 2 <br />