Electro-oxidation process for molybdenum concentrates①
来源期刊：中南大学学报(英文版)2005年第2期
论文作者：符剑刚 钟宏 卜向明 王弗礼
文章页码：134 - 139
Key words：molybdenite;sodium hypochlorite;electro-oxidation;hydrometallurgical process;ultrasonic intensification
Abstract: Sodium hypochlorite was used to treat the standard molybdenum concentrates; the oxidization conditions for sodium hypochlorite were investigated, and the electro-oxidation process was performed. The results indicate that in the suitable conditions, such as temperature around 25℃, NaCl concentration 4.0 mol/L, mass ratio of oreslurry liquid to solid (mL/mS) 20, electric charge per gram Mo 0.522 C, pH value of original slurry 8, anodic current density 700 A·m-2(cell potential 2.7 2.9 V), the Mo leaching rate and the current efficiency reach 98% and 36%, respectively. In order to overcome some shortages of the electro-oxidation process, such as low current efficiency, low Mo concentration in the leaching solution, ultrasonic was adopted to intensify the leaching process. The results show that the Mo leaching rate exceeds 98%, current efficiency increases from 36% to 50% and the Mo concentration in the leaching solution reaches about 60 g/L at low mL/mS of 8 and low electric charge of 0.373 C.
