Replacement of lead-silver anodes with Ti-based anodes in zinc electrowinning process: (feasibility, coating developement, side effects, performance and energy efficiency)

锌电解提取过程中用钛基阳极替代铅银阳极：（可行性、涂层开发、副作用、性能和能源效率）

• 批准号: 522069-2017
• 负责人: Alamdari, Houshang
• 金额: $ 13.11万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696206
• 关键词: Replacement; lead; silver; anodes; Ti

This research and development program aims to improve the energy efficiency of the zinc electrolysis process. Two industrial partners support this research program; CEZinc and Outotec Canada. The main research component is the replacement of conventional Pb-Ag anodes with titan anodes. Ti anodes have demonstrated a good performance in reducing the potential for oxygen evolution in electrolysis cells. This potential reduction of about 300 to 400 mV can translate into energy savings of nearly 100 GWh per year, or about 10% of the energy consumption of electrolysis. However, in order to use new anodes, their long-term performance needs to be validated and peripheral technologies need to be developed; i.e. the control of Mn and Cl concentrations in the electrolysis cells. The second area of research involves increasing the efficiency of purification process of the zinc solution. More particularly, the cobalt cementation process is targeted. Currently about 6% of zinc production is reinjected into the process for the removal of cobalt. This research program therefore aims to develop new technologies for the management of Mn and Cl in the electrolyte, to validate the performance of titanium anodes in the zinc electrolysis process, and to increase the efficiency of the cobalt cementation process by a new method of preparing Zn powders. The results obtained as part of this research program will give a considerable technological advantage to our partners; CEZinc and Outotec.

该研发计划旨在提高锌电解过程的能源效率。两个工业合作伙伴支持该研究计划； CEZinc 和奥图泰加拿大。主要研究内容是用钛阳极替代传统的Pb-Ag阳极。钛阳极在降低电解槽中析氧潜力方面表现出良好的性能。大约 300 至 400 mV 的潜在降低可以转化为每年近 100 GWh 的能源节省，或电解能耗的 10% 左右。然而，为了使用新的阳极，需要验证其长期性能并开发外围技术；即电解池中 Mn 和 Cl 浓度的控制。研究的第二个领域涉及提高锌溶液净化过程的效率。更具体地，以钴渗碳工艺为目标。目前，大约 6% 的锌产量被重新注入到脱钴工艺中。 因此，本研究计划旨在开发管理电解液中锰和氯的新技术，验证钛阳极在锌电解过程中的性能，并通过制备锌的新方法提高钴置换过程的效率粉末。作为该研究计划的一部分获得的成果将为我们的合作伙伴带来相当大的技术优势； CEZinc 和奥图泰。