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首页> 外文期刊>International Journal of Electrochemical Science >A Clean and Highly Efficient Leaching–Electrodeposition Lead Recovery Route in HClO4 Solution
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A Clean and Highly Efficient Leaching–Electrodeposition Lead Recovery Route in HClO4 Solution

机译：HClO 4 溶液中清洁高效的浸出-电沉积铅回收路线

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To address a series of problems in the hydrometallurgical process of lead recovery, such as high energy consumption (810-930 kWh ton-1), low efficiency and electrolyte pollution, we invented a novel, highly efficient and clean route for recovering high purity metallic lead via a leaching- electrodeposition process in a HClO4 solution. First, the desulfurated spent lead paste and lead plate- grids from spent lead–acid batteries were dissolved in the HClO4 solution to generate a HClO4– Pb(ClO4)2 solution, denoted as the leaching process. An electrolysis process was then conducted in this solution to obtain metallic lead with HClO4 regenerated for reuse in the next batch, denoted as the electrodeposition process. For the leaching process, the concentration of HClO4, leaching temperature and leaching time were systematically investigated to achieve the highest leaching rate. For the 2+ electrodeposition process, the influences of Pb concentration and HClO4 concentration, temperature, current density, and additives on the electrode position process were studied in detail and optimized. The results show that the invented route has a lead leaching rate of above 98.5%, an electrolytic energy -1 consumption of only 500 kWh tonnePb , and a purity for the electrodeposited lead product of up to 99.9991%.
机译：为解决湿法冶金铅回收过程中的一系列问题，例如高能耗（810-930 kWh ton-1），低效率和电解质污染，我们发明了一种新颖，高效，清洁的方法来回收高纯度金属通过HClO4溶液中的浸出-电沉积过程获得铅。首先，将废铅酸电池中的脱硫废铅膏和铅板栅溶解在HClO4溶液中，生成HClO4-Pb（ClO4）2溶液，称为浸出过程。然后在该溶液中进行电解过程，得到再生的HClO4的金属铅，可再用于下一批，称为电沉积过程。对于浸出过程，系统地研究了HClO4的浓度，浸出温度和浸出时间，以达到最高浸出率。对于2+电沉积工艺，详细研究和优化了Pb浓度和HClO4浓度，温度，电流密度和添加剂对电极定位工艺的影响。结果表明，本发明路线的铅浸出率达到98.5％以上，电解能量-1消耗仅为500 kWh吨铅，电沉积铅产品的纯度高达99.9991％。

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