Preparation of pure SnO_2 powders from tin slag of printed circuit boards waste  

作　　者：Bin Li Shen-Gen Zhang Kun Zhang De-An Pan Jian-Jun Tian Duan-Ting Zhang 

机构地区：[1]Institute for Advanced Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing [2]Beijing Nonferrous Metals and Rare Earth Research Institute

出　　处：《Rare Metals》2014年第6期749-753,共5页稀有金属（英文版）

基　　金：financially supported by the Beijing Nova Program (No. Z141103001814006);the National Key Technology R&D Program (Nos. 2012BAC12B05 and 2012BAC02B01);the National Natural Science Foundation of China (Nos. 51174247 and U1360202);the National High-Tech Research and the Development Program of China (No. 2012AA063202)

摘　　要：The recycling method and principle of SnO2 from the tin slag of printed circuit boards（PCB） waste were investigated. In this study, pure SnO2 powders were obtained through a multi-step process including ball-milling, roasting, dissolving, precipitating, and pickling. The total recovery rate of tin can be up to 91 %. The SnO2 powders obtained is the single phase, and the content of SnO2 is up to 99.9 %. However, the SnO2 particles are easier to agglomerate during the precipitation process. The agglomerate SnO2 particles are about 7.778 lm in mean particle size（D50）. This preparation method presents a viable alternative for the tin slag recycling. The tin is not only recycled, but also reused directly to prepare pure SnO2 powders.The recycling method and principle of SnO2 from the tin slag of printed circuit boards（PCB） waste were investigated. In this study, pure SnO2 powders were obtained through a multi-step process including ball-milling, roasting, dissolving, precipitating, and pickling. The total recovery rate of tin can be up to 91 %. The SnO2 powders obtained is the single phase, and the content of SnO2 is up to 99.9 %. However, the SnO2 particles are easier to agglomerate during the precipitation process. The agglomerate SnO2 particles are about 7.778 lm in mean particle size（D50）. This preparation method presents a viable alternative for the tin slag recycling. The tin is not only recycled, but also reused directly to prepare pure SnO2 powders.

关 键 词：SNO2 Tin slag Printed circuit boards（PCB） waste 

分 类 号：TQ134.32[化学工程—无机化工]