587 In 2002, when cyanide destruction in CIP tailings at Antapite began using Caro’s Acid, the average consumption was 10.5 kg.AC/ kg. cyanide; by the end of the optimization in 2010, consumption was reduced to 2.2kg.AC/kg. cyanide. Figure 2 - Caro’s Acid consumption (Kg) in the destruction of NaCN (Kg). Regarding the efficiency of the Caro’s Acid process in free cyanide destruction, it is necessary to establish a comparison parameter based on treatment cost relative to ore throughput. In 2002, the average cost of cyanide destruction with Caro’s Acid was $1.22/t of ore treated, while in 2006 it was $0.93/t. Cyanide destruction efficiency was 93.7%, and after optimization, the cost decreased to 0,30$/t, with efficiency reaching 99.9% Figure 3 - Caro’s Acid cost ($/t) Vs Cyanide destruction efficiency (%). 14.7 9.7 8.9 9.6 9.6 8.4 4.5 3.0 2.2 0 2 4 6 8 10 12 14 16 2002 2003 2004 2005 2006 2007 2008 2009 2010 Caro’s Acid (Kg) / NaCN( Kg) Caro’s Acid (Kg) / NaCN( Kg) 92.5 92.9 93.3 95.0 94.6 97.5 99.3 99.9 99.9 1.22 0.87 0.70 0.84 1.02 0.91 0.61 0.42 0.30 0 0.2 0.4 0.6 0.8 1 1.2 1.4 88 90 92 94 96 98 100 102 2002 2003 2004 2005 2006 2007 2008 2009 2010 Caro’s Acid ($/t) Destruction efficiency of NaCN % Destruction efficiency of NaCN % Caro’s Acid ($/t)
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