Reduction kinetics of magnetite concentrate particles by carbon monoxide. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Abolpour, Bahador; Afsahi, M. Mehdi; Azizkarimi, Mehdi
• Is Part Of: Mineral processing and extractive metallurgy. Volume 127:Issue 1(2018)
• Page Start: 29
• Page End: 39
• Publication Date: 2018-01-02
• Subjects: Magnetite concentrate -- carbon monoxide -- reduction -- kinetics -- TGA; Ore-dressing -- Periodicals; Metallurgy -- Periodicals; Metallurgy; Ore-dressing; Periodicals; 669
• DOI: 10.1080/03719553.2016.1277094
• Languages: English
• ISSNs: 2572-6641

Abstract

ABSTRACT: In this study, the reaction kinetics of carbon monoxide reduction of magnetite ore concentrate in the temperature range of 973–1173 K (700–900°C) has been investigated using the thermal-gravimetric analysis. Various methods were used to obtain the governing mechanism and reaction rate constant of this reaction. It was observed that the sintering phenomenon affects the concentrate particles' reduction at temperatures higher than 1173 K (900°C). CO reduction of magnetite concentrate to pure iron or iron carbide occurred as a single-step reaction. The first-order reaction model and diffusion models are two important mechanisms for this reaction in the operating temperature range. The following equation is the result of our research work relevant to carbon monoxide reduction of the magnetite concentrate particles in order to predict the progress of the reduction reaction (with R 2 about 0.98):