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首页> 外文期刊>Metals >Microwave and Ultrasound Augmented Leaching of Complicated Zinc Oxide Ores in Ammonia and Ammonium Citrate Solutions
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Microwave and Ultrasound Augmented Leaching of Complicated Zinc Oxide Ores in Ammonia and Ammonium Citrate Solutions

机译：复杂的氧化锌矿石在氨水和柠檬酸铵溶液中的微波和超声强化浸出

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Recovery of zinc from low grade zinc oxide ore is attempted with ammonia and ammonium citrate solutions augmented by microwave roasting and ultrasound radiation. The influence of the ammonia-ammonium ratio, roasting temperature, ultrasound power, and leaching time were assessed on the recovery of zinc. A maximum zinc recovery of 88.57% could be achieved at a roasting temperature of 673 K, leaching temperature of 298 K, stirring speed of 300 rpm, total ammonia concentration of 5 mol/L with an ammonium citrate concentration of 1.2 mol/L, liquid to solid ratio of 5:1, the ultrasound power was 600 W and the leaching time was 120 min. The enhancement in recovery with increases in the roasting temperature up to 673 K was attributed to the conversion of ZnCO 3 to ZnO. The phases of mineral samples and the reaction residues were characterized by X-ray diffraction (XRD).
机译：尝试通过微波焙烧和超声辐射增强氨和柠檬酸铵溶液从低品位氧化锌矿石中回收锌。评估了氨铵比，焙烧温度，超声功率和浸出时间对锌的回收率的影响。在673 K的焙烧温度，298 K的浸出温度，300 rpm的搅拌速度，5 mol / L的总氨浓度和1.2 mol / L的柠檬酸铵浓度下，液体可获得最大的锌回收率88.57％当固体比为5：1时，超声功率为600 W，浸出时间为120分钟。随着焙烧温度升高至673 K，回收率的提高归因于ZnCO 3向ZnO的转化。矿物样品的相和反应残留物通过X射线衍射（XRD）进行表征。

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