Enhancement of leaching refractory gold concentrate with high arsenic and sulphur content by ultrasonic electro-oxidation technology

2012 ◽  
Vol 51 (2) ◽  
pp. 141-149 ◽  
Author(s):  
P Zhu ◽  
L Y Wang ◽  
K F Li ◽  
M Zhou
Keyword(s):  
Sulphur Content ◽  
Refractory Gold ◽  
Oxidation Technology ◽  
Electro Oxidation ◽  
High Arsenic

scholarly journals Bio-oxidation of a refractory gold bearing high arsenic sulphide concentrate: A pilot study

1993 ◽  
Vol 11 (1-3) ◽  
pp. 243-252 ◽  
Author(s):  
J.T. Chapman ◽  
P.B. Marchant ◽  
R.W. Lawrence ◽  
R. Knopp
Keyword(s):  
Pilot Study ◽  
Refractory Gold ◽  
High Arsenic ◽  
Gold Bearing

Study on the Gold Leaching Process by Potassium Ferricyanide

2015 ◽  
Vol 814 ◽  
pp. 273-277
Author(s):  
Ping Tang ◽  
Jing Liu ◽  
Min Wei Song ◽  
Hai Ping Yu ◽  
Xu Zhang
Keyword(s):  
Room Temperature ◽  
Potassium Ferricyanide ◽  
Process Conditions ◽  
Leaching Rate ◽  
Gold Leaching ◽  
Solid Ratio ◽  
Leaching Process ◽  
Refractory Gold ◽  
Object Of Study ◽  
High Arsenic

The traditional gold leaching method is cyanidation, which carries serious security and environmental problems. More and more attention is paid to the research on non-cyanide process. A high-arsenic-and-sulphur refractory gold concentrate in Sichuan was taken as the object of study. After the roasting-oxidation pretreatment of the sample, potassium ferricyanide was adopted to carry on the process experiment on gold-leaching. The leaching results as well as correlative process conditions were both investigated. The results showed that good leaching effects could be achieved by potassium ferricyanide. When the amount of potassium ferricyanide was 60g/L, the concentration of NaOH 0.2mol/L, the liquid-solid ratio 6:1 and the leaching process at room temperature lasted for 20h, the gold leaching rate reached 88.1%. If the leaching aid CaO2 is added simultaneously, it can contribute to the gold leaching. When the amount of CaO2 was 3g/L, the gold leaching rate increased to more than 94%, the amount of potassium ferricyanide decreased to 50g/L and the leaching time reduced to 14h.

Bio-oxidation of a high-sulfur and high-arsenic refractory gold concentrate using a two-stage process

2018 ◽  
Vol 120 ◽  
pp. 94-101 ◽  
Author(s):  
Guohua Wang ◽  
Shuibo Xie ◽  
Xinxing Liu ◽  
Yonghong Wu ◽  
Yingjiu Liu ◽  
...  
Keyword(s):  
Two Stage ◽  
Refractory Gold ◽  
Stage Process ◽  
High Arsenic

Kinetics of high-sulphur and high-arsenic refractory gold concentrate oxidation by dilute nitric acid under mild conditions

2009 ◽  
Vol 22 (2) ◽  
pp. 111-115 ◽  
Author(s):  
Guolong Gao ◽  
Dengxin Li ◽  
Yong Zhou ◽  
Xianhao Sun ◽  
Wen Sun
Keyword(s):  
Nitric Acid ◽  
Mild Conditions ◽  
Refractory Gold ◽  
Kinetics Of ◽  
Dilute Nitric Acid ◽  
High Arsenic
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