A graphical tool to describe the operating point of the direct reduction shaft processes - Université de Lorraine Access content directly
Preprints, Working Papers, ... Year : 2023

A graphical tool to describe the operating point of the direct reduction shaft processes

Thibault Quatravaux

Abstract

This article presents a new graphical tool for direct reduction shaft processes, inspired by the Rist diagram developed for the blast furnaces. The tool represents gas flows using vectors, with specific consumption and specific oxidation as components to indicate gas/iron ratios. Key features include consideration of gas chemical composition for vector directions, easy visual representation of gas mixtures, as well as reduction and carburization rates of Direct Reduced Iron (DRI). The tool also includes thermodynamic conditions for reduction from the Chaudron diagram, analogous to the Rist diagram. Several practical applications are presented, including quantifying gas moisture, evaluating the measurement consistency of flowmeters and gas analyzers in top gas recycling, and evaluating instantaneous DRI production by analyzing reducing gas at the inlet and outlet of the shaft. This graphical tool could be useful for production teams to monitor and optimize process flow and promote understanding among students, engineers, technicians and operators. Its potential for online use further enhances its practical value. As a result, the tool is of significant academic and industrial interest in improving process efficiency and optimization.
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Dates and versions

hal-04194698 , version 1 (04-09-2023)

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Thibault Quatravaux. A graphical tool to describe the operating point of the direct reduction shaft processes. 2023. ⟨hal-04194698⟩
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