Abstract
BackgroundThe dissolution process kinetics and optimization of iron from Akwuke ore were investigated in this study. The effects of process parameters such as agitation rate and ore particle size on the dissolution process were also examined. The Akwuke ore was characterized employing the XRD, FT-IR, SEM, and UV-spectroscopy.ResultsThe results from the rate constants indicated that the diffusion through the boundary layer process with R2 > 0.96 was the rate-determining mechanism. The maximum iron dissolution rate of 83.2% was obtained at 45-μm particle size while 81.2% and 72.6% iron dissolution rates were obtained at 490 and 390 rpm agitation rates, respectively. Silicon oxide, aluminum oxide, and iron oxide were present in Akwuke ore as indicated from the XRD analysis. The RSM predicted optimum value of the iron dissolution rate from the numerical optimization was experimentally validated to confirm the satisfactory performance of the quadratic model.ConclusionThis study concludes and presents the potential extraction of iron from Akwuke ore, which will be of immense benefit in hydrometallurgical process.
Highlights
The dissolution process kinetics and optimization of iron from Akwuke ore were investigated in this study
The statistical method used in this study investigates the kinetic model validity by estimating the degree of correlation between the experimental and model calculated data
Effects of process parameters Effect of particle size and agitation rate on iron dissolution from Akwuke ore The effects of ore particle sizes on iron dissolution rates from Akwuke ore was investigated at room temperature while varying the particle sizes from 45 μm, 75 μm, 150 μm, 300 μm, and 600 μm. Other experimental conditions such as agitation rate and reaction time were kept constant at 490 rpm and 240 min, respectively
Summary
The dissolution process kinetics and optimization of iron from Akwuke ore were investigated in this study. The effects of process parameters such as agitation rate and ore particle size on the dissolution process were examined. The Akwuke ore was characterized employing the XRD, FT-IR, SEM, and UV-spectroscopy. Iron as one of the most prevalent of all metals is among the earth’s crust abundant elements. Iron ores are embedded in minerals such as hematite, pyrite, and ilmenite in the form of iron (III) oxide (Olvera-Venegas et al 2017). Oxides in iron constitute impurities that require removal as it affects the commercial value of iron. Different hydrometallurgical extraction processes have been used to study the extraction processes of iron and other valuable metals of interest from their oxide bearing nature (Kokes et al, 2014).
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