Tantalum Capacitor Separation from Waste Printed Circuit Boards with Molten Salt or Metal

被引：5

作者：

Riedewald, Frank ^{[1
]}

Povey, Ian ^{[2
]}

Barton, Killian ^{[3
]}

Lewis, Liam ^{[3
]}

Santos, Silvia ^{[4
]}

O'Mahoney, Maria ^{[5
]}

Sousa-Gallagher, Maria ^{[6
]}

机构：

[1] Composite Recycling Ltd, Rubicon Ctr, CIT Campus, Cork T12 Y275, Ireland

[2] Univ Coll Cork, Tyndall Natl Inst, Cork T12 R5CP, Ireland

[3] Munster Technol Univ, Cork T12 P928, Ireland

[4] Alumisel, Poligono A Granxa S-N, O Porrino 364000, Spain

[5] Univ Coll Cork, Environm Res Inst, Lee Rd, Sundays Well T23 XE10, Ireland

[6] Univ Coll Cork, Sch Engn, Proc & Chem Engn, Cork T12 K8AF, Ireland

来源：

CHEMIE INGENIEUR TECHNIK | 2023年 / 95卷 / 06期

关键词：

Metal recovery; Printed circuit boards recycling; Pyrolysis; Tantalum recycling; RECOVERY;

D O I：

10.1002/cite.202200008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Tantalum is the crucial metal of surface-mounted (SMD) tantalum capacitors. Some 50 % of the tantalum mined is consumed in its manufacture, making waste printed circuit boards (WPCBs) an excellent source of secondary tantalum. Yet, its recycling rate is less than 1 %. This paper proposes liberating SMD capacitors from WPCBs by treating them with molten metal or salt. For both processes, the epoxy encapsulation of the capacitors did not disengage from the tantalum core. Furthermore, the molten metal process appears superior to the molten salt one. The tantalum capacitors exit the pyrolysis chamber without salt adhering to them.

引用

页码：944 / 949

页数：6

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