裂纹核模型在磁铁矿还原为浮士体中的应用

Reactivity of Solids Pub Date : 1990-06-01 DOI:10.1016/0168-7336(90)80012-9

J. Janowski, A. Barański, M. Łagan, J. Nedoma, A. Sadowski

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引用次数: 3

摘要

用热重法研究了磁铁矿在1293 K下还原为浮士体Fe0.936O的过程。在接近大气压的条件下，用CO2 + CO混合气体对半径在0.3 ~ 5.0 mm范围内的球状样品进行还原。得到了s型动力学曲线。1975年Park和Levenspiel提出的噼啪核心模型与数据吻合。该模型考虑了固体颗粒的脆裂和化学反应。详细讨论了模型的适用范围，并对原有的参数计算方法作了一定的修改。

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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On the application of the crackling core model to the reduction of magnetite to wustite

The reduction of magnetite to wustite Fe_0.936O was studied by means of thermogravimetry at 1293 K. Sphere-like samples of constant radius, within the radius range 0.3–5.0 mm, were reduced by flowing a CO₂ + CO gas mixture at nearly atmospheric pressure. Sigmoidal-type kinetic curves were obtained.

The crackling core model proposed in 1975 by Park and Levenspiel fits the data. The model takes into account crackling of solid grains and a chemical reaction. The limits of applicability of the model are discussed in more detail and the original procedure for calculating its parameters was modified to some extent.

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