Numerical approach for optimization of magnetic roller and evaluating the performance of permanent magnet roller separator through design of experiment

G.T. Mohanraj; Sharnappa Joladarashi; Harish Hanumanthappa; Bharath Kumar Shanmugam; Harsha Vardhan; Gajanan M. Naik; P. Devadas Bhat; M.R. Rahman

Alexandria Engineering Journal (Dec 2022)

Numerical approach for optimization of magnetic roller and evaluating the performance of permanent magnet roller separator through design of experiment

G.T. Mohanraj,
Sharnappa Joladarashi,
Harish Hanumanthappa,
Bharath Kumar Shanmugam,
Harsha Vardhan,
Gajanan M. Naik,
P. Devadas Bhat,
M.R. Rahman

Affiliations

G.T. Mohanraj: Department of Metallurgical and Materials Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India
Sharnappa Joladarashi: Department of Mechanical Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India
Harish Hanumanthappa: Department of Mechanical Engineering, Atria Institute of Technology, Karnataka, Bangalore 560024, India
Bharath Kumar Shanmugam: Department of Mining Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India
Harsha Vardhan: Department of Mining Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India
Gajanan M. Naik: Department of Mechanical Engineering, RV Institute of Technology and Management, Karnataka, JP Nagar, Bangalore 560076, India
P. Devadas Bhat: Department of Metallurgical and Materials Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India
M.R. Rahman: Department of Metallurgical and Materials Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India; Corresponding author.

Journal volume & issue: Vol. 61, no. 12
pp. 13011 – 13033

Abstract

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The present study is focused on numerical analysis of magnetic roller (Mr) using finite element method magnetics (FEMM) software for different magnet disc-to-steel disc (MD-to-SD) width ratios. The numerical (FEMM) results reveal that, the optimized Mr with the MD-to-SD width ratio of 5 mm: 2.5 mm was proved advantageous because of the effective magnetic field (Mf) value of 0.89–2.59 T. The artificial neural network (ANN) modelling technique was used for the prediction analysis of obtained numerical results. Furthermore, by using optimized Mr, the lab-scale permanent magnet roller separator (PMRS) was developed and parametric optimization has been carried out using Taguchi-based L27 orthogonal array design. The significance of parameters on the overall quality of the product has also been evaluated quantitatively by the analysis of variance (ANOVA) method. It was found that the belt thickness was the most influential factor in the product of desired Fe grade and recovery %. The obtained regression coefficient (i.e., R2 = 87.13 and 91.69% for Fe grade and Fe recovery %, respectively) and normal probability plot show the highest correlation between the experimented and predicted data. The results suggested that the numerical approach was suitable for designing optimized Mr for the processing of paramagnetic minerals.

Published in Alexandria Engineering Journal

ISSN: 1110-0168 (Print); 2090-2670 (Online)
Publisher: Elsevier
Country of publisher: Egypt
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/alexandria-engineering-journal/

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