Flash calcination of magnesite in a one-throughput transport bed: reaction characterization and industrial justification

IF 5.9 3区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of Industrial and Engineering Chemistry Pub Date : 2024-09-10 DOI:10.1016/j.jiec.2024.09.012

Ping An, Zhenglong Sun, Xiaofeng Song, Cong Sun, Bowei Yan, Zhennan Han, Dingrong Bai, Guangwen Xu

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Abstract

This study investigated flash calcination of magnesite powder in a one-throughput transport bed to clarify how the conversion and product activity as well as microstructure vary with reaction conditions including temperature, particle size, and numbers of re-calcination. Results showed that calcination of magnesite powder at 850–1000 °C is a quick reaction, allowing 99% of its containing MgCO to be decomposed in 1–2 s. Activity of product from the transport bed flash calcination (TBFC) is obviously higher than that from fixed bed calcination. Product activity depends on both decomposition rate and microstructure. During calcination, the surface structure of product changes from loose and porous to dense and smooth, even in a few seconds. A recently commissioned commercial TBFC plant indeed produced the light-burned magnesia according to the anticipation of this study, and it only requires a fuel consumption about 40 % lower than that of conventional reverberatory furnace.

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在单程传输床中闪速煅烧菱镁矿：反应特征和工业理由

本研究对菱镁矿粉在单通道传输床中的闪速煅烧进行了研究，以阐明转化率、产品活性以及微观结构如何随温度、粒度和再煅烧次数等反应条件的变化而变化。结果表明，在 850-1000 °C 下煅烧菱镁矿粉是一种快速反应，在 1-2 秒内就能分解出 99% 的 MgCO。产品活性取决于分解率和微观结构。在煅烧过程中，即使在几秒钟内，产品的表面结构也会从疏松多孔变为致密光滑。最近投产的一家商业 TBFC 工厂确实按照本研究的预期生产出了轻烧菱镁矿，而且所需的燃料消耗比传统反射炉低约 40%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Industrial and Engineering Chemistry 工程技术-工程：化工

CiteScore

10.40

自引率

6.60%

发文量

639

审稿时长

29 days

期刊介绍： Journal of Industrial and Engineering Chemistry is published monthly in English by the Korean Society of Industrial and Engineering Chemistry. JIEC brings together multidisciplinary interests in one journal and is to disseminate information on all aspects of research and development in industrial and engineering chemistry. Contributions in the form of research articles, short communications, notes and reviews are considered for publication. The editors welcome original contributions that have not been and are not to be published elsewhere. Instruction to authors and a manuscript submissions form are printed at the end of each issue. Bulk reprints of individual articles can be ordered. This publication is partially supported by Korea Research Foundation and the Korean Federation of Science and Technology Societies.