Preheating Characteristics of Magnetite Pellets Under Microwave Irradiation

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

JOM Pub Date : 2024-10-30 DOI:10.1007/s11837-024-06955-y

Ran Tian, Zhiwei Peng, Wanlong Fan, Guanwen Luo, Mingjun Rao

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引用次数: 0

Abstract

The microwave preheating characteristics of magnetite pellets were investigated based on the microwave absorption capability analysis. With increasing microwave power from 1100 W to 1500 W, the initial heating rate of the pellets increased from 134.9°C/min to 233.0°C/min and then decreased because of the decrease in microwave magnetic loss induced by the oxidation of Fe₃O₄ to Fe₂O₃ and more heat loss from the pellets to the surroundings. With the same terminal temperature, the pellets after microwave preheating (MP pellets) obtained higher oxidation fraction and compressive strength and lower porosity than those produced by conventional preheating (CP pellets), associated with the variations of content and crystallite size of Fe₂O₃. Moreover, MP pellets had larger and more concentrated Fe₂O₃ particles in their cores than their shells and the corresponding areas in CP pellets, demonstrating the advantages of microwave which intensified the oxidation of the pellets in the preheating process.

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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.