{"title":"磁铁矿助熔剂球团氧化过程的各种理化分析方法研究","authors":"B. P. Yur’ev, V. A. Dudko","doi":"10.1134/S1990793124700908","DOIUrl":null,"url":null,"abstract":"<p>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.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"18 5","pages":"1284 - 1293"},"PeriodicalIF":1.4000,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study of the Oxidation Process of Magnetite Fluxed Pellets by Various Methods of Physical and Chemical Analysis\",\"authors\":\"B. P. Yur’ev, V. A. Dudko\",\"doi\":\"10.1134/S1990793124700908\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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.</p>\",\"PeriodicalId\":768,\"journal\":{\"name\":\"Russian Journal of Physical Chemistry B\",\"volume\":\"18 5\",\"pages\":\"1284 - 1293\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2024-12-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Physical Chemistry B\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1990793124700908\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1990793124700908","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
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.
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.