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All Journal Jurnal Metalurgi dan Material Indonesia
R.M Ario Adisaputro
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Automotive Engineering Chemistry Engineering Industrial & Manufacturing Engineering

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Pengaruh Variasi Konsentrasi CN- Pada Proses Pelindian Bijih Au Terhadap Recovery Au, Gangue Ag, Cu dan Fe Sutarno Sutarno; Andri Kabarubun; Iskandar Muda; R.M Ario Adisaputro
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 2 (2019): Agustus
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

Gold is a precious metal, valuable, and widely found in Indonesia. Gold metal applications can be found in the jewelry, medical, catalyst and high-tech industries. In this study 35 mm of gold ore with a level of 15.6 ppm was extracted using NaCN as a lixiviant. The leaching process parameters included variations in 200, 300, and 400 ppm CN- concentrations, 48 hour leaching time and lixiviant pH in the range of 10-11. To increase the extraction rate was added Pb(NO3)2 catalyst and 15 ppm oxygen. Characterization results with AAS obtained the highest gold recovery was 88.46% Au at CN-300 ppm concentration, leaching time of 8 hours. In addition to gold metal, other metals are also found as gangue such as Ag, Cu and Fe.
Co-Authors Andri Kabarubun Holyness Nurdin Singadimedja Iskandar Muda