High-Temperature Vacuum Treatment of Aluminum Electrolytic Spent Carbon CathodeJournal of Sustainable Metallurgy - Tập 8 - Trang 1204-1214 - 2022
Xin Xin, Junxue Zhao, Ailin Hu, Ze Wang, Yi Kang, Mengmeng Ren, Bin Li, Wendan Tang
The spent carbon cathode (SCC) produced in the aluminum electrolysis process has been listed as hazardous waste due to excessive soluble fluoride and cyanide. In a high-temperature vacuum environment, the soluble fluoride and cyanide in SCC can be evaporated and decomposed, respectively. As a result, its impact on the environment can be eliminated. The remains and volatiles can be collected for re...... hiện toàn bộ
Nickel Metal Hydride Battery Waste: Mechano-hydrometallurgical Experimental Study on Recycling AspectsJournal of Sustainable Metallurgy - Tập 6 - Trang 78-90 - 2020
Antti Porvali, Severi Ojanen, Benjamin P. Wilson, Rodrigo Serna-Guerrero, Mari Lundström
In this research, the recycling of industrially collected and crushed nickel metal hydride battery waste, rich in valuable metals such as Ni and rare earth elements (REE), was investigated. The crushed waste was characterized based on elemental distribution per particle size class and density. Although issues with sieving, such as agglomeration of shredded separator fibers, were observed, a good s...... hiện toàn bộ
Recovery of Rare-Earth Elements from Molten Salt Electrolytic Slag by Fluorine Fixation Roasting and LeachingJournal of Sustainable Metallurgy - Tập 8 - Trang 522-531 - 2022
Peng Xing, Huiquan Li, Chunlin Ye, Liqin Zhong
Recycling waste containing rare earth has always been a research hotspot. The molten salt electrolysis process of rare-earth metals and alloys generates a large amount of waste slag, which contains high rare-earth content and, thus, has very considerable recovery value. However, the high content of fluorine in rare-earth molten salt slag brings challenges to the separation of rare-earth elements (...... hiện toàn bộ
Progress in Waste Lead Paste Recycling Technology from Spent Lead–Acid Battery in ChinaJournal of Sustainable Metallurgy - Tập 8 - Trang 978-993 - 2022
Xiaowu Jie, Zhichao Yao, Chengyan Wang, Dingfan Qiu, Yongqiang Chen, Yonglu Zhang, Baozhong Ma, Wei Gao
The incorporation of lead into most consumer items such as gasoline, paints, and welding materials is generally prohibited. However, lead–acid batteries (LABs) have become popular and have emerged as a major area where lead is utilized. Appropriate recycling technologies and the safe disposal of LABs (which contain approximately 65% lead) and lead-containing waste are, therefore, vital for the sus...... hiện toàn bộ
Effect of Na2O Addition on Phosphorus Dissolution from Steelmaking Slag with High P2O5 ContentJournal of Sustainable Metallurgy - Tập 3 - Trang 671-682 - 2017
Chuan-ming Du, Xu Gao, Shigeru Ueda, Shin-ya Kitamura
Slag with high P2O5 content generated during the use of high-P iron ores is an important potential source of phosphate. Because the P-rich 2CaO·SiO2–3CaO·P2O5 solid solution in the slag was preferentially dissolved compared with other phases in aqueous solutions, selective leaching of P from slag with high P2O5 content was applied to recover soluble P in this study. To improve dissolution of the ...... hiện toàn bộ