文献类型：期刊文献

英文题名：A novel cleaner production for ferromagnetic materials from red mud: Process design, thermodynamic study and environment assessment

作者：Wu, Yadong Li, Fangqi Liu, Wei Yang, Chaosen Liu, Rong Huang, Hongsheng

第一作者：Wu, Yadong

通信作者：Huang, HS[1]|[144406c0812405d42e8a8]黄宏升;

机构：[1]Guizhou Inst Technol, Coll Artificial Intelligence Elect Engn, Sch Chem Engn, Guiyang 550029, Peoples R China;[2]Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550025, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn 1, 1 Caiguan Rd, Guiyang, Guizhou, Peoples R China.|贵州理工学院;

年份：2024

卷号：191

起止页码：861-872

外文期刊名：PROCESS SAFETY AND ENVIRONMENTAL PROTECTION

收录：;EI(收录号：20243717034640);Scopus(收录号：2-s2.0-85203540102);WOS:【SCI-EXPANDED(收录号:WOS:001315659000001)】；

基金：This study was supported by the Guizhou Provincial Federation of Social Sciences (GZLCLH-2024-97) ; Education Department of Guizhou Province (QJJ [2022] 266) ; National Science Foundation of China (21963006) ; Education Department of Guizhou Province (QJJ [2022] 035) .

语种：英文

外文关键词：Red mud; Ferromagnetic materias; Process design; Thermodynamic analysis; Environment assessment

摘要：The ineffective utilization of resources and the potential harm to the ecological environment are both consequences of the accumulation of red mud (RM). This study focuses on synthesizing ferromagnetic materials (FMs) through a hydrometallurgical method, using compounds containing iron (CCI) derived from RM. The study primarily focused on process design, thermodynamic analysis, and environment assessment. Effectively, this procedure resulted in the production of two varieties of FMs: Fe2O3 and Fe3O4, exhibiting purities of 94.8 % and 98.6 %, correspondingly. The utilization of different concentrations of various flocculants (APAM, PAM, and CPAM) resulted in a substantial improvement in the flocculation process, with APAM demonstrating superior effectiveness. Based on the results of environmental assessments, it was found that the levels of toxic and hazardous substances in the residual solids were below 0.01 wt%, while in wastewater they were below 10(-6) mol L-1. Furthermore, the study put forward mechanisms to explain phase transformation, flocculation, and magnetic separation. The thermodynamic calculation provided insights into the energy variation and reaction extent during the controllable synthesis of FMs. The current study provides a feasible resolution to improve the efficiency of resource recovery and reduce environmental pollution, thus encouraging the adoption of cleaner production methods.