Abstract
The chemical process appearing at thermal contact of hematite with carbon monoxide was modeled using TERRA software package. In this case, the molar ratio of CO/Fe 2 O 3 components varied in the range of 1 – 15, and the process temperature – in the range of 25 – 1500 °C. Carbon monoxide at normal temperature decomposes almost completely to form carbon and carbon dioxide (the Bell-Boudoir reaction). When the process temperature increases, this carbon consistently participates in formation of the phases of magnetite, iron and cementite, and carbon dioxide participates in vustite formation and in iron decarburization. The carbon monoxide does not directly participate as a reducing reagent in local chemical reactions of this process.
Highlights
Газовая фаза в доменных печах и в агрегатах, работающих по технологии CUREX или MIDREX, содержит в своем составе значительное количество монооксида углерода СО [1 – 3]
The chemical process appearing at thermal contact of hematite
this carbon consistently participates in formation of the phases
Summary
For citation: Berdnikov V.I., Gudim Yu.A. Chemical reactions during iron reduction from oxides in carbon monoxide environment. Газовая фаза в доменных печах и в агрегатах, работающих по технологии CUREX или MIDREX, содержит в своем составе значительное количество монооксида углерода СО [1 – 3]. Однако существующая информация о роли его в процессе восстановления железа крайне противоречива. Поэтому было решено провести термодинамический анализ системы Fe – O – C = {2, 3 + n, n}, имитирующей пребывание одного моля гематита в газовой среде, изначально содержащей n молей СО.
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