%0 Journal Article
%T Recovery of Cyanide from Effluents: SART Process
%A Elif YILMAZ
%J -
%D 2019
%X Gold production from copper-rich gold ores is increasing at worldwide. Owing to the high dissolution of copper minerals in cyanide solutions, technical and economic difficulties have been faced in treatment of those ores. Gold extraction from ores that contain >0.5% Cu is often uneconomic by traditional cyanide leaching. High cyanide concentrations (CN:Cu>4) should be maintained to achieve high gold extractions. This, in turn, leads to an increase in reagent consumptions and environmental risk due to higher use cyanide. SART process was developed in particular for recovery of cyanide from the effluents of intensive cyanidation of Au-Cu ores. The process is applied worldwide and in Turkey at industrial scale. It is based on precipitation of copper in the form of Cu2S from leach solutions under acidic conditions (pH 4-5) by addition of sulphide (as Na2S) leading to the release of free cyanide prior to its recovery. Cu2S is sold as a by-product. The performance of the process is dependent on the addition of sulphur, precipitation period, retention of copper precipitates in the thickener and other parameters. Addition of sulphur should be strictly controlled to obtain a high purity Cu2S precipitate. In this study, chemical principles and factors affecting the performance of SART process are discussed in detail. A general economic analysis of the process in view of capital and operating costs is also presented
%K Bak£¿r £¿£¿eren Alt£¿n Cevherleri
%K Siyan¨¹r Li£¿i
%K Siyan¨¹r Geri Kazan£¿m£¿
%K SART Prosesi
%U http://dergipark.org.tr/gumusfenbil/issue/46153/452203