体系电解法
(1. 西安交通大学 金属材料强度国家重点实验室,
西安 710049;
2. 中南大学 冶金科学与工程学院, 长沙 410083;
3. 白银有色金属(集团)有限责任公司, 白银 730900)
摘 要: 研究了在Zn(Ⅱ)-NH3·H2O-(NH4)2SO4体系中电解制取活性锌粉新工艺。结果表明:在常温下, 电流效率高达88.19%,每吨产品能耗为3254.37kW·h, 其产品质量符合GB6890-86标准; 活性锌粉杂质含量低, 锌含量≥98.78%, 有效锌含量≥96%, 锌的总回收率为97.97% 。 该法与以金属锌为原料的蒸馏法、 雾化法相比较, 成本大幅度降低。
关键字: Zn(Ⅱ)-NH3·H2O-(NH4)2SO4;电解; 活性锌粉
system of Zn(Ⅱ)-NH3·H2O-(NH4)2SO4
(1. State Key Laboratory for Mechanical Behavior of Materials,
Xi'an Jiaotong University, Xi'an 710049, China;
2. School of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China;
3. Baiyin Nonferrous Metals(Group) Co. Ltd., Baiyin 730900, China)
Abstract:A new process for preparing active zinc powder by electrowinning in the system of Zn(Ⅱ)-NH3·H2O-(NH4)2SO4 was studied. Electrowinning at room temperature has a good result. The current efficiency is about 88.19%, the energy comsuption for per ton zinc is about 3254.37kW·h. The active zinc powder contains zinc 98.78% and the impurities included in product are low, meeting with the standard of GB6890-86. The total recovery of zinc is about 97.97%. This process has the lowest cost compared with the traditional processes.
Key words: ammonia ammonium sulphate; electrowinning; active zinc