Preparation of Na2FeO4 from Red Mud Sodium Roasting and Alkali Leaching Residue with the Aid of Ultrasound

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-01-27 DOI:10.1007/s11837-025-07144-1

Shuyue Guan, Junjie Tang, Yuan Sun, Yanhong Yang, Laishi Li, Yusheng Wu, Fanian Shi

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Abstract

Red mud is rich in Fe, Al, Si and Ti elements and is the main solid waste of the alumina industry, which has great recycling value. The red mud after sodium roasting is studied in this paper, considering the influences of leaching temperature, leaching time and solid-liquid ratio on the leaching rates of Al and Si elements in red mud. The result shows that the leaching rates of Al and Si elements are 96.28% and 54.04% under the optimum condition. The dissolubility of Al and Si elements in alkali leaching solution is analyzed from the phase changes of red mud after sodium roasting. The influences of ultrasound on the synthesis conditions of Na₂FeO₄ are researched, and the results show that the application of ultrasound can shorten the reaction time of Na₂FeO₄ and increase the concentration of Na₂FeO₄. The mechanism of promoting Na₂FeO₄ formation by ultrasonic was elucidated from the effects of physics and chemistry. Moreover, the response surface method is used to optimize the preparation process of Na₂FeO₄ by ultrasound.

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超声辅助赤泥钠焙烧碱浸渣制取Na2FeO4

赤泥富含铁、铝、硅、钛等元素，是氧化铝工业的主要固体废弃物，具有很大的回收利用价值。对钠焙烧后赤泥进行了研究，考察了浸出温度、浸出时间和料液比对赤泥中Al、Si元素浸出率的影响。结果表明，在最佳浸出条件下，铝和硅元素的浸出率分别为96.28%和54.04%。从赤泥经钠焙烧后的相变化出发，分析了铝、硅元素在碱浸溶液中的溶解性。研究了超声波对Na2FeO4合成条件的影响，结果表明，超声波的应用可以缩短Na2FeO4的反应时间，提高Na2FeO4的浓度。从物理和化学两方面阐述了超声波促进Na2FeO4生成的机理。利用响应面法对超声法制备Na2FeO4的工艺进行了优化。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.