气候变化领域集成服务门户(CCPortal): A simple but effective method for the enrichment of Al in red mud waste

CCPortal

DOI	10.1016/j.seppur.2024.127053
	A simple but effective method for the enrichment of Al in red mud waste
	Feng, Haiwei; Wang, Zhiqing; Feng, Sihang; Sun, Haochen; Liu, Zheyu; Huang, Jiejie; Guo, Zhenxing; Hao, Zhenhua; Fang, Yitian
发表日期	2024
ISSN	1383-5866
EISSN	1873-3794
起始页码	342
卷号	342
英文摘要	This study proposes transforming red mud, an abundant byproduct from the aluminum industry, into minerals using Na2CO3 activation for efficient water leaching. It was aimed at breaking down the rigid Al-Si network structure. The investigation compares the effects of sodium salts, with Na2CO3 achieving an 88.90 % aluminum leaching rate crucial for activating katoite and cancrinite in red mud. Using XRD, FT-IR, SEM-EDS, in situ hotstage microscopy, FactSage, and Material Flow Analysis, the study explores changes in Na2CO3-loaded red mud, elucidating its role in converting aluminum-bearing minerals into water-soluble aluminates at a low temperature of 900 degrees C for an optimum activation duration of 90 min, with a preferred loading of 32 % Na2CO3. Introducing a new cyclic aluminum extraction method from red mud, utilizing sodium salts, especially Na2CO3, the study optimizes the activation process through a comprehensive exploration of thermal and mineral transformation behaviors. Quantitative analysis of Na and Al elements ensures successful recovery and cyclic utilization of Na2CO3, maintaining aluminum extraction efficiency above 82 % after six cycles. This economically feasible closed-loop system aligns with principles of industrial efficiency and climate change mitigation. Na2CO3, acting as an activator and a carbon sink, showcases significant potential for sustainable aluminum production.
英文关键词	Red mud; Water leaching; Na 2 CO 3 activation; Sustainable Al production; Closed-loop system
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:001220999400001
来源期刊	SEPARATION AND PURIFICATION TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295062
作者单位	Chinese Academy of Sciences; Institute of Coal Chemistry, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; North China Institute of Aerospace Engineering
推荐引用方式 GB/T 7714	Feng, Haiwei,Wang, Zhiqing,Feng, Sihang,et al. A simple but effective method for the enrichment of Al in red mud waste[J],2024,342.
APA	Feng, Haiwei.,Wang, Zhiqing.,Feng, Sihang.,Sun, Haochen.,Liu, Zheyu.,...&Fang, Yitian.(2024).A simple but effective method for the enrichment of Al in red mud waste.SEPARATION AND PURIFICATION TECHNOLOGY,342.
MLA	Feng, Haiwei,et al."A simple but effective method for the enrichment of Al in red mud waste".SEPARATION AND PURIFICATION TECHNOLOGY 342(2024).