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0,20 0,18 0,16 . . Electrow<strong>in</strong>n<strong>in</strong>g . No electrow<strong>in</strong>n<strong>in</strong>g 0,14 " 0,12 bI) Z U 0,10 0:1 ~0,08 0,06 0,04 0,02 o o Flg.10-Rate 2 3 4 5 6 Time, h <strong>of</strong> oxidation <strong>of</strong> cy~nide Ina typical <strong>gold</strong>electrowlnnlng cell 4. FINKELSTEIN,N.P. <strong>The</strong> chemistry <strong>of</strong> <strong>the</strong> <strong>extraction</strong> <strong>of</strong> <strong>gold</strong> from its ores. Gold metallurgy <strong>in</strong> South Africa. Adamson, R.J. (ed.). Johannesburg, Chamber <strong>of</strong> M<strong>in</strong>es <strong>of</strong> South Africa, 1972. pp. 284-351. 5. MORITZ,G. Electrolytic decomposition <strong>of</strong> <strong>cyanide</strong>s. Mod. Ytbehandl<strong>in</strong>g, vol. 9, no. 4. 1974. pp. 34-36. 6. DAVIDSON,R.J. A pilot plant study on <strong>the</strong> effects <strong>of</strong> <strong>cyanide</strong> concentration on <strong>the</strong> CIP process. GOLD lOO.Proceed<strong>in</strong>gs <strong>of</strong> <strong>the</strong> International Conference on Gold. Fivaz, C.E., and K<strong>in</strong>g, R.P. (eds.). Johannesburg, South African Institute <strong>of</strong> M<strong>in</strong><strong>in</strong>g and Metallurgy, 1986. vol. 2, pp. 209-223. 7. ANON. Kidston Gold M<strong>in</strong>e. M<strong>in</strong>. Mag., voJ. 154. Jan. 1986. pp. 16-21. 8. DAVIDSON, R.J., and SCHMIDT, C.G. A review <strong>of</strong> <strong>the</strong> AARL process for <strong>the</strong> elution <strong>of</strong> <strong>gold</strong> from activated carbon. Proceed<strong>in</strong>gs <strong>of</strong> <strong>the</strong> 15th CMMI Congress. Field<strong>in</strong>g, LE., and Gordon, A.R. (eds.). S<strong>in</strong>gapore, <strong>The</strong> Australasian Institute <strong>of</strong> M<strong>in</strong><strong>in</strong>g and Metallurgy, 1986. vol. 4, pp. 215-225. 9. ROBEY, H.L Cyanide destruction <strong>in</strong> a commercial-scale hydrolysis reactor. Plato Surf. F<strong>in</strong>ish., voJ. 70, no. 6, 1983. pp. 79-82. 10. MOUSSAVI, M., and SUNDARAM, S.S. <strong>The</strong>rmal decomposition <strong>of</strong> <strong>cyanide</strong> waste. Plato Surf. F<strong>in</strong>ish., vol. 69, no. 7: 1982. pp. 67-71. 11. ADAMS, M.D., and NICOL, M.J. <strong>The</strong> k<strong>in</strong>etics <strong>of</strong> <strong>the</strong> elution <strong>of</strong> <strong>gold</strong> from activated carbon. GOLD lOO. Proceed<strong>in</strong>gs <strong>of</strong> <strong>the</strong> International Conference on Gold. Fivaz, C.E., and K<strong>in</strong>g, R.P. (eds.). Johannesburg, South African Institute <strong>of</strong> M<strong>in</strong><strong>in</strong>g and Metallurgy, 1986. voJ. 2, pp. lll-121. JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY MARCH 1990 73