TY - JOUR AU - Parga, J. R. AU - Carrillo, F. R. PY - 1996/08/30 Y2 - 2024/03/29 TI - Advances in the methods for gold and silver recovery from refractory ores JF - Revista de Metalurgia JA - Rev. metal. VL - 32 IS - 4 SE - Reviews DO - 10.3989/revmetalm.1996.v32.i4.907 UR - https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/907 SP - 254-261 AB - Recent research work in hydrometallurgical processes for precious metals recovery from refractory ores is analyzed. Advantages and applications are discussed. Likewise, two methods, one stage direct pressure oxidation/cyanidation and pyrometallurgical recovery, are also described. In the first one, gold and silver oxidation and recovery can be carried out in the same reactor simultaneously. A higher than 96 % recovery in less than 90 min can be achieved. As for the pyrometallurgical recovery method, lead paste from automotive discharged batteries is use and no sulfur dioxide is generated. A precious metals recovery higher than 96 % is reached. ER -