The rapid digitalization of the world, technological up-gradation, and shorten life cycle of electronic gadgets leading to the generation of an enormous amount of waste tantalum capacitors (WTCs) rich in tantalum every year. The need of the hour is to develop an effective way to recycle tantalum from these waste scraps considering the scarcity of tantalum, environmental impacts, resource and energy utilization, and lower recycling rates. In this paper, various existing methods of recovery of metallic tantalum from WTCs have been extensively reviewed. Processes have been examined in light of recovery efficiency, purity of the resultant product, process complexity, and limitations. The bottleneck in the recovery of tantalum from WTCs is the presence of tightly covered mold resin over the surface of the tantalum anode. Various researchers have recovered Ta with varying degrees of success. Pyrolysis, followed by chloride metallurgy, has been proven to be an effective technology on account of its high removal rate, resource and energy utilization, and lesser environmental impacts. This article also explores the global scenario of tantalum. Overall this review provides a foundation to understand the potential barrier and various opportunities associated with the recovery of tantalum from WTCs.

世界的快速数字化、技术升级和电子产品生命周期的缩短导致每年产生大量富含钽的废钽电容器（WTC）。考虑到钽的稀缺性、环境影响、资源和能源利用以及较低的回收率，当前的需要是开发一种从这些废废料中回收钽的有效方法。在本文中，广泛回顾了从 WTC 中回收金属钽的各种现有方法。已根据回收效率、所得产品的纯度、工艺复杂性和局限性对工艺进行了检查。从 WTC 回收钽的瓶颈是在钽阳极表面存在紧密覆盖的模制树脂。不同的研究人员已经以不同程度的成功回收了 Ta。热解法和氯化物冶金法具有去除率高、资源和能源利用率高、环境影响小等优点，已被证明是一种有效的技术。本文还探讨了钽的全球情景。总体而言，本综述为了解与从世贸中心回收钽相关的潜在障碍和各种机会奠定了基础。