Padhi, Mandakini
(2015)
Understanding Multicomponent classification behavior in a Hydrocyclone.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
In most mineral comminution circuit, the feed to the hydro cyclone classifier is composed of a mixture of particles having varying degrees of liberation and sizes. The different liberation degree for the minerals leads to multi density particles that are significantly differ in hydro cyclone during the classification. Hydro cyclone classifier performance calculation till now is based on single average mineral density component behavior, contradicting to the actual situation of naturally occurring ores. Therefore, present work is aimed to study the separation by size wise component classification curves of hydro cyclone operation including the study of varying density components. This involves on varying set of parameters i.e. spigot, pressure, cone angle and feed solid content. The initial studies is done with bicomponent mixture of pure magnetite and silica with 5 proportions 1:9, 2:8, 1:1, 8:2, 9:1 (silica: magnetite) conducted in 2 inch hydro cyclone. Further, this also includes the 3 inch hydro cyclone classification multicomponent studies, using naturally occurring iron ore slimes which have iron, alumina and silica as 3 compositions. The component analysis of iron ore has been done by combination of volumetric analysis, X-ray fluorescence (XRF), Inductively Coupled Plasma Mass Spectrometry(ICP-OES) and gravimetric method for ensuring the size-wise distribution of the Fe2O3, Al2O3and Si2O in respective streams after separation. A set of optimized hydro cyclone operation is identified for the iron ore slimes beneficiation suitable for pellet grade product.
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