磁铁矿助熔剂球团氧化过程的各种理化分析方法研究

IF 1.4 4区 化学 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Russian Journal of Physical Chemistry B Pub Date : 2024-12-11 DOI:10.1134/S1990793124700908
B. P. Yur’ev, V. A. Dudko
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引用次数: 0

摘要

为了获得磁铁矿球团氧化焙烧过程的最完整信息,采用多种物理化学分析方法进行了综合研究。为了近似评估氧化加热过程中最可能发生的反应,进行了热力学分析。根据化学反应等温线方程确定的等压势符号,我们判断某一特定化学反应在考虑的方向上发生的可能性。对碳酸钙解离反应的影响是通过硅酸钙和铁氧体的形成促进其发生,以及氧化铁与碳酸钙的相互作用反应,反之则抑制其发生来确定的。开发了一种技术,用于通过颗粒材料层过滤的固体-气体系统的热成像分析,该技术在一个装置上实现,该装置允许在不同氧含量、温度和热处理时间的气流中对颗粒进行实验。实验证明,在惰性单原子气体的气氛中,以及在不含二氧化碳的气体混合物中,颗粒脱碳最彻底、最迅速。在较宽的温度范围内对磁铁矿助熔剂球团样品进行了矿物学研究。将球团按照不同的加热曲线加热到一定的温度,然后冷却,以固定到达指定温度时形成的结构。在这项研究中获得的结果对参与技术开发的专家特别感兴趣,这些技术可以确保生产具有强冶金性能的球团。
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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Study of the Oxidation Process of Magnetite Fluxed Pellets by Various Methods of Physical and Chemical Analysis

In order to obtain the most complete information about the processes occurring during the oxidative roasting of magnetite iron ore pellets, comprehensive studies are carried out using various methods of physicochemical analysis. To approximate the assessment of the most probable reactions occurring in pellets during oxidative heating, a thermodynamic analysis is performed. Based on the sign of the isobaric potential, determined from the equation of the isotherm of a chemical reaction, we judge the possibility of a particular chemical reaction occurring in the direction under consideration. The influence on the dissociation reaction of calcium carbonate is established by the formation of calcium silicates and ferrites, which facilitate its occurrence, as well as the reaction of the interaction of iron oxide with calcium carbonate, which, on the contrary, inhibits its occurrence. A technique is developed for thermographic analysis of solid-gas systems filtered through a layer of granular material, which is implemented on an installation that allows experiments with pellets in a gas flow with different oxygen contents, temperatures, and heat treatment durations. It is experimentally established that pellets are decarbonized most completely and quickly in an atmosphere of inert monatomic gas, as well as in a mixture of gases that do not contain carbon dioxide. Mineralogical studies are carried out on samples of magnetite fluxed pellets in a wide temperature range. The pellets are heated in accordance with a differential heating curve to certain temperatures, and then cooled in order to fix the structure formed by the time the specified temperature is reached. The results obtained in this study are of particular interest to specialists involved in the development of technologies that ensure the production of pellets with strong metallurgical properties.

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来源期刊
Russian Journal of Physical Chemistry B
Russian Journal of Physical Chemistry B 化学-物理:原子、分子和化学物理
CiteScore
2.20
自引率
71.40%
发文量
106
审稿时长
4-8 weeks
期刊介绍: Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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